fix ci: turn on import std tests, fix libc++ build (#96)

This PR:
- enables tests with `import std` usage in CI
- add all tests to build with cmake_subdir_test (because there was only a subset of tests supported)
- fixes tests build with `libc++`
- disables some tests with wchar_t with 'libc++'

.github/dependabot.yml

@@ -0,0 +1,11 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+        interval: "weekly"

.github/workflows/ci.yml

@@ -0,0 +1,260 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+      - develop
+      - feature/**
+
+env:
+  UBSAN_OPTIONS: print_stacktrace=1
+
+jobs:
+  posix:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - toolset: gcc-14  # Do not remove! It is the only toolset that tests CMake tests down below
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-24.04
+            compiler: g++-14
+          - toolset: gcc-12
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-22.04
+            cxxflags: "cxxflags=--coverage -fsanitize=address,leak,undefined -fno-sanitize-recover=undefined"
+            linkflags: "linkflags=--coverage -lasan -lubsan"
+            gcov_tool: "gcov-12"
+            launcher: "testing.launcher=LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libasan.so.8"
+          - toolset: gcc-11
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-22.04
+          - toolset: clang
+            compiler: clang++-14
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-22.04
+          - toolset: clang
+            cxxstd: "11,14,17,20"
+            os: macos-latest
+          - toolset: clang-19
+            cxxstd: "20,23"
+            os: ubuntu-24.04
+            compiler: clang++-19
+            install: clang-19 llvm-19 libclang-rt-19-dev libc++-19-dev libc++abi-19-dev clang-tools-19
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Install packages
+        if: matrix.install
+        run: sudo apt install ${{matrix.install}}
+
+      - name: Setup Boost
+        run: |
+          echo GITHUB_REPOSITORY: $GITHUB_REPOSITORY
+          LIBRARY=${GITHUB_REPOSITORY#*/}
+          echo LIBRARY: $LIBRARY
+          echo "LIBRARY=$LIBRARY" >> $GITHUB_ENV
+          echo GITHUB_BASE_REF: $GITHUB_BASE_REF
+          echo GITHUB_REF: $GITHUB_REF
+          REF=${GITHUB_BASE_REF:-$GITHUB_REF}
+          REF=${REF#refs/heads/}
+          echo REF: $REF
+          BOOST_BRANCH=develop && [ "$REF" == "master" ] && BOOST_BRANCH=master || true
+          echo BOOST_BRANCH: $BOOST_BRANCH
+          cd ..
+          git clone -b $BOOST_BRANCH --depth 10 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          git submodule update --init --depth 10 --jobs 2 tools/boostdep tools/inspect libs/filesystem
+          python tools/boostdep/depinst/depinst.py --git_args "--depth 10 --jobs 3" filesystem
+          rm -rf libs/$LIBRARY/*
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          python tools/boostdep/depinst/depinst.py --include benchmark --include example --include examples --include tools --git_args "--depth 10 --jobs 3" $LIBRARY
+          ./bootstrap.sh
+          ./b2 -j4 variant=debug tools/inspect
+
+      - name: Run modules tests without 'import std;'
+        if: ${{matrix.toolset == 'clang-19'}}
+        run: |
+          cd ../boost-root/libs/lexical_cast
+          cmake -S test/cmake_subdir_test -B build_module \
+            -GNinja \
+            -DBUILD_TESTING=1 \
+            -DBOOST_USE_MODULES=1 \
+            -DCMAKE_CXX_COMPILER=clang++-19 \
+            -DCMAKE_C_COMPILER=clang-19
+          cmake --build build_module
+          ctest --test-dir build_module -V --no-tests=error
+          rm -rf build_module
+
+      - name: Run modules tests
+        if: ${{matrix.toolset == 'clang-19'}}
+        run: |
+          cd ../boost-root/libs/lexical_cast
+          cmake -S test/cmake_subdir_test -B build_module \
+            -GNinja \
+            -DBUILD_TESTING=1 \
+            -DBOOST_USE_MODULES=1 \
+            -DCMAKE_CXX_COMPILER=clang++-19 \
+            -DCMAKE_C_COMPILER=clang-19 \
+            -DCMAKE_CXX_FLAGS=-stdlib=libc++ \
+            -DCMAKE_CXX_STANDARD=23 \
+            -DCMAKE_EXPERIMENTAL_CXX_IMPORT_STD=0e5b6991-d74f-4b3d-a41c-cf096e0b2508 \
+            -DCMAKE_CXX_MODULE_STD=ON
+          cmake --build build_module
+          ctest --test-dir build_module -V --no-tests=error
+          rm -rf build_module
+
+      - name: Run CMake tests
+        if: ${{matrix.toolset == 'gcc-14' || matrix.toolset == 'clang-19'}}
+        run: |
+          cd ../boost-root/
+          cmake -S . -B __build \
+            -DBUILD_TESTING=1 \
+            -DBOOST_INCLUDE_LIBRARIES=lexical_cast \
+            -DCMAKE_CXX_COMPILER=${{matrix.compiler}} \
+            -DCMAKE_C_COMPILER=${{matrix.toolset}}
+          cmake --build __build --target tests
+          ctest --test-dir __build --output-on-failure --no-tests=error
+          rm -rf __build
+
+      - name: Run tests
+        run: |
+          cd ../boost-root
+          ./b2 -j3 libs/$LIBRARY/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} variant=debug,release "${{matrix.cxxflags}}" "${{matrix.linkflags}}" "${{matrix.launcher}}"
+          dist/bin/inspect libs/$LIBRARY
+
+      - name: Prepare coverage data
+        if: matrix.gcov_tool
+        run: |
+          mkdir -p $GITHUB_WORKSPACE/coveralls
+
+          echo -e "#!/bin/bash\nexec ${{matrix.gcov_tool}} \"\$@\"" > $GITHUB_WORKSPACE/coveralls/gcov_wrapper.sh
+          chmod +x $GITHUB_WORKSPACE/coveralls/gcov_wrapper.sh
+          wget https://github.com/linux-test-project/lcov/archive/v1.16.zip
+          unzip v1.16.zip
+          LCOV="`pwd`/lcov-1.16/bin/lcov --gcov-tool $GITHUB_WORKSPACE/coveralls/gcov_wrapper.sh"
+
+          echo "$LCOV --directory ../boost-root/bin.v2/libs/$LIBRARY/ --base-directory `pwd`/libs/$LIBRARY/test --capture --output-file $GITHUB_WORKSPACE/coveralls/coverage.info"
+          $LCOV --directory ../boost-root/bin.v2/libs/$LIBRARY/ --base-directory ../boost-root/ --capture --output-file $GITHUB_WORKSPACE/coveralls/coverage.info
+          $LCOV --remove $GITHUB_WORKSPACE/coveralls/coverage.info "/usr*" "*/$LIBRARY/test/*" ${{matrix.ignore_coverage}} "*/$LIBRARY/tests/*" "*/$LIBRARY/examples/*" "*/$LIBRARY/example/*" -o $GITHUB_WORKSPACE/coveralls/coverage.info
+
+          cd ../boost-root
+          OTHER_LIBS=`grep "submodule .*" .gitmodules | sed 's/\[submodule\ "\(.*\)"\]/"\*\/boost\/\1\.hpp" "\*\/boost\/\1\/\*"/g'| sed "/\"\*\/boost\/$LIBRARY\/\*\"/d" | sed ':a;N;$!ba;s/\n/ /g'`
+          echo $OTHER_LIBS
+          eval "$LCOV --remove $GITHUB_WORKSPACE/coveralls/coverage.info $OTHER_LIBS -o $GITHUB_WORKSPACE/coveralls/coverage.info"
+
+      - name: Coveralls
+        uses: coverallsapp/github-action@master
+        if: matrix.gcov_tool
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          path-to-lcov: ./coveralls/coverage.info
+          parallel: true
+
+  windows:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - toolset: msvc-14.3
+            cxxstd: "14,17,20,latest"
+            addrmd: 32,64
+            os: windows-2022
+          - toolset: msvc
+            cxxstd: "14,17,latest"
+            addrmd: 64
+            os: windows-2025
+          - toolset: gcc
+            cxxstd: "03,11,14,17,2a"
+            addrmd: 64
+            os: windows-2022
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Setup Boost
+        shell: cmd
+        run: |
+          echo GITHUB_REPOSITORY: %GITHUB_REPOSITORY%
+          for /f %%i in ("%GITHUB_REPOSITORY%") do set LIBRARY=%%~nxi
+          echo LIBRARY: %LIBRARY%
+          echo LIBRARY=%LIBRARY%>>%GITHUB_ENV%
+          echo GITHUB_BASE_REF: %GITHUB_BASE_REF%
+          echo GITHUB_REF: %GITHUB_REF%
+          if "%GITHUB_BASE_REF%" == "" set GITHUB_BASE_REF=%GITHUB_REF%
+          set BOOST_BRANCH=develop
+          for /f %%i in ("%GITHUB_BASE_REF%") do if "%%~nxi" == "master" set BOOST_BRANCH=master
+          echo BOOST_BRANCH: %BOOST_BRANCH%
+          cd ..
+          git clone -b %BOOST_BRANCH% --depth 10 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          xcopy /s /e /q %GITHUB_WORKSPACE% libs\%LIBRARY%\
+          git submodule update --init tools/boostdep libs/test
+          python tools/boostdep/depinst/depinst.py --include benchmark --include example --include examples --include tools --git_args "--jobs 3" %LIBRARY%
+          cmd /c bootstrap
+
+      - name: Run CMake tests
+        if: ${{matrix.toolset == 'msvc-14.3'}}
+        shell: cmd
+        run: |
+          choco install --no-progress ninja
+          call "C:/Program Files/Microsoft Visual Studio/2022/Enterprise/VC/Auxiliary/Build/vcvarsall.bat" x64
+          cd ../boost-root/
+          mkdir __build
+          cd __build
+          cmake -DBUILD_TESTING=1 -DBOOST_INCLUDE_LIBRARIES=lexical_cast -G Ninja ..
+          cmake --build . --target tests --config Debug
+          ctest --output-on-failure --no-tests=error -C Debug
+
+      - name: Run modules tests
+        if: false
+        #if: ${{matrix.toolset == 'msvc-14.3'}}
+        shell: cmd
+        run: |
+          choco install --no-progress ninja
+          call "C:/Program Files/Microsoft Visual Studio/2022/Enterprise/VC/Auxiliary/Build/vcvarsall.bat" x64
+          cd ../boost-root/libs/lexical_cast
+          rm -rf build_module
+          mkdir build_module
+          cd build_module
+          cmake -DBOOST_USE_MODULES=1 -DCMAKE_CXX_STANDARD=23 -DCMAKE_EXPERIMENTAL_CXX_IMPORT_STD=0e5b6991-d74f-4b3d-a41c-cf096e0b2508 -G Ninja ../test/cmake_subdir_test/
+          cmake --build .
+          ctest --no-tests=error -V
+
+      - name: Run modules tests without 'import std;'
+        if: ${{matrix.toolset == 'msvc-14.3'}}
+        shell: cmd
+        run: |
+          choco install --no-progress ninja
+          call "C:/Program Files/Microsoft Visual Studio/2022/Enterprise/VC/Auxiliary/Build/vcvarsall.bat" x64
+          cd ../boost-root/libs/lexical_cast
+          rm -rf build_module
+          mkdir build_module
+          cd build_module
+          cmake -DBOOST_USE_MODULES=1 -DCMAKE_CXX_STANDARD=20 -G Ninja ../test/cmake_subdir_test/
+          cmake --build .
+          ctest --no-tests=error -V
+
+      - name: Run tests
+        shell: cmd
+        run: |
+          cd ../boost-root
+          b2 -j3 libs/%LIBRARY%/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} address-model=${{matrix.addrmd}} variant=debug,release
+
+  finish:
+    if: false
+    needs: posix
+    runs-on: ubuntu-latest
+    steps:
+    - name: Coveralls Finished
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.github_token }}
+        parallel-finished: true

.travis.yml

@@ -1,85 +0,0 @@
-# Use, modification, and distribution are
-# subject to the Boost Software License, Version 1.0. (See accompanying
-# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-#
-# Copyright Antony Polukhin 2014.
-
-#
-# See https://svn.boost.org/trac/boost/wiki/TravisCoverals for description of this file
-# and how it can be used with Boost libraries.
-#
-
-os:
-    - linux
-
-env:
-    - CXX_STANDARD=c++98
-    - CXX_STANDARD=c++0x
-
-before_install:
-    # Set this to the name of your Boost library
-    # Autodetect library name by using the following code: - PROJECT_TO_TEST=$(basename $(pwd))
-    - PROJECT_TO_TEST=$(basename $(pwd))
-
-    # Autodetect Boost branch by using the following code: - BRANCH_TO_TEST=`git rev-parse --abbrev-ref HEAD`
-    # or by - BRANCH_TO_TEST=$TRAVIS_BRANCH or just directly specify it
-    - BRANCH_TO_TEST=$TRAVIS_BRANCH
-
-    # Files, which coverage results must be ignored (files from other projects). Example: - IGNORE_COVERAGE='*/boost/progress.hpp */filesystem/src/path.cpp'
-    - IGNORE_COVERAGE='*/boost/progress.hpp */filesystem/src/path.cpp */numeric/conversion/converter_policies.hpp'
-
-
-    # From this point and below code is same for all the Boost libs
-    # Cloning Boost libraries (fast nondeep cloning)
-    - PROJECT_DIR=`pwd`
-    - BOOST=$HOME/boost-local
-    - git init $BOOST
-    - cd $BOOST
-    - git remote add --no-tags -t $BRANCH_TO_TEST origin https://github.com/boostorg/boost.git
-    - git fetch --depth=1
-    - git checkout $BRANCH_TO_TEST
-    - git submodule update --init --merge
-    - git remote set-branches --add origin $BRANCH_TO_TEST
-    - git pull --recurse-submodules
-    - git submodule update --init
-    - git checkout $BRANCH_TO_TEST
-    - git submodule foreach "git reset --quiet --hard; git clean -fxd"
-    - git reset --hard; git clean -fxd
-    - git status
-    - rm -rf $BOOST/libs/$PROJECT_TO_TEST
-    - mv $PROJECT_DIR/../$PROJECT_TO_TEST/ $BOOST/libs/$PROJECT_TO_TEST
-    - PROJECT_DIR=$BOOST/libs/$PROJECT_TO_TEST
-    - ./bootstrap.sh
-    - ./b2 headers
-
-script:
-    - if [ "$CCFLAGS" != "" ]; then FLAGS="cxxflags=\"$CCFLAGS\" linkflags=\"$LINKFLAGS\""; else FLAGS=""; fi
-    - cd $BOOST/libs/$PROJECT_TO_TEST/test/
-    # `--coverage` flags required to generate coverage info for Coveralls
-    - ../../../b2 cxxflags="--coverage -std=$CXX_STANDARD" linkflags="--coverage"
-
-after_success:
-    # Copying Coveralls data to a separate folder
-    - mkdir -p $PROJECT_DIR/coverals
-    - find ../../../bin.v2/ -name "*.gcda" -exec cp "{}" $PROJECT_DIR/coverals/ \;
-    - find ../../../bin.v2/ -name "*.gcno" -exec cp "{}" $PROJECT_DIR/coverals/ \;
-
-    # Preparing Coveralls data by
-    # ... installing the tools
-    - sudo apt-get install -qq python-yaml lcov
-    # ... changind data format to a readable one
-    - lcov --directory $PROJECT_DIR/coverals --base-directory ./ --capture --output-file $PROJECT_DIR/coverals/coverage.info
-
-    # ... erasing /test/ /example/ folder data
-    - cd $BOOST
-    - lcov --remove $PROJECT_DIR/coverals/coverage.info "/usr*" "*/$PROJECT_TO_TEST/test/*" $IGNORE_COVERAGE "*/$PROJECT_TO_TEST/tests/*" "*/$PROJECT_TO_TEST/examples/*" "*/$PROJECT_TO_TEST/example/*" -o $PROJECT_DIR/coverals/coverage.info
-
-    # ... erasing data that is not related to this project directly
-    - OTHER_LIBS=`grep "submodule .*" .gitmodules | sed 's/\[submodule\ "\(.*\)"\]/"\*\/boost\/\1\.hpp" "\*\/boost\/\1\/\*"/g'| sed "/\"\*\/boost\/$PROJECT_TO_TEST\/\*\"/d" | sed ':a;N;$!ba;s/\n/ /g'`
-    - echo $OTHER_LIBS
-    - eval "lcov --remove $PROJECT_DIR/coverals/coverage.info $OTHER_LIBS -o $PROJECT_DIR/coverals/coverage.info"
-
-    # Sending data to Coveralls
-    - cd $PROJECT_DIR
-    - gem install coveralls-lcov
-    - coveralls-lcov coverals/coverage.info

CMakeLists.txt

@@ -0,0 +1,46 @@
+# Generated by `boostdep --cmake lexical_cast`
+# Copyright 2020 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# https://www.boost.org/LICENSE_1_0.txt
+
+cmake_minimum_required(VERSION 3.5...4.0)
+
+project(boost_lexical_cast VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX)
+
+
+if (BOOST_USE_MODULES)
+    add_library(boost_lexical_cast)
+    target_sources(boost_lexical_cast PUBLIC
+        FILE_SET modules_public TYPE CXX_MODULES FILES
+            ${CMAKE_CURRENT_LIST_DIR}/modules/boost_lexical_cast.cppm
+    )
+
+    target_compile_features(boost_lexical_cast PUBLIC cxx_std_20)
+    target_compile_definitions(boost_lexical_cast PUBLIC BOOST_USE_MODULES)
+    if (CMAKE_CXX_COMPILER_IMPORT_STD)
+        target_compile_definitions(boost_lexical_cast PRIVATE BOOST_LEXICAL_CAST_USE_STD_MODULE)
+        message(STATUS "Using `import std;`")
+    else()
+        message(STATUS "`import std;` is not available")
+    endif()
+    set(__scope PUBLIC)
+else()
+    add_library(boost_lexical_cast INTERFACE)
+    set(__scope INTERFACE)
+endif()
+
+target_include_directories(boost_lexical_cast ${__scope} include)
+target_link_libraries(boost_lexical_cast
+  ${__scope}
+    Boost::config
+    Boost::container
+    Boost::core
+    Boost::throw_exception
+)
+
+add_library(Boost::lexical_cast ALIAS boost_lexical_cast)
+
+if(BUILD_TESTING)
+  add_subdirectory(test)
+endif()
+

README.md

@@ -1,16 +1,15 @@
-#[Boost.LexicalCast](http://boost.org/libs/lexical_cast)
-Boost.LexicalCast is one of the [Boost C++ Libraries](http://github.com/boostorg). This library is meant for general literal text conversions, such as an int represented a string, or vice-versa.
+# [Boost.LexicalCast](https://boost.org/libs/lexical_cast)
+Boost.LexicalCast is one of the [Boost C++ Libraries](https://github.com/boostorg). This library is meant for general literal text conversions, such as an int represented a string, or vice-versa.
 
 ### Test results
 
 @               | Build         | Tests coverage | More info
 ----------------|-------------- | -------------- |-----------
-Develop branch: | [![Build Status](https://travis-ci.org/apolukhin/lexical_cast.svg?branch=develop)](https://travis-ci.org/apolukhin/lexical_cast)  | [![Coverage Status](https://coveralls.io/repos/apolukhin/lexical_cast/badge.png?branch=develop)](https://coveralls.io/r/apolukhin/lexical_cast?branch=develop) | [details...](http://www.boost.org/development/tests/develop/developer/lexical_cast.html)
-Master branch:  | [![Build Status](https://travis-ci.org/apolukhin/lexical_cast.svg?branch=master)](https://travis-ci.org/apolukhin/lexical_cast)  | [![Coverage Status](https://coveralls.io/repos/apolukhin/lexical_cast/badge.png?branch=master)](https://coveralls.io/r/apolukhin/lexical_cast?branch=master) | [details...](http://www.boost.org/development/tests/master/developer/lexical_cast.html)
+Develop branch: | [![CI](https://github.com/boostorg/lexical_cast/actions/workflows/ci.yml/badge.svg?branch=develop)](https://github.com/boostorg/lexical_cast/actions/workflows/ci.yml) [![Build status](https://ci.appveyor.com/api/projects/status/mwwanh1bpsnuv38h/branch/develop?svg=true)](https://ci.appveyor.com/project/apolukhin/lexical-cast/branch/develop)  | [![Coverage Status](https://coveralls.io/repos/boostorg/lexical_cast/badge.png?branch=develop)](https://coveralls.io/r/boostorg/lexical_cast?branch=develop) | [details...](https://www.boost.org/development/tests/develop/developer/lexical_cast.html)
+Master branch:  | [![CI](https://github.com/boostorg/lexical_cast/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/boostorg/lexical_cast/actions/workflows/ci.yml) [![Build status](https://ci.appveyor.com/api/projects/status/mwwanh1bpsnuv38h/branch/master?svg=true)](https://ci.appveyor.com/project/apolukhin/lexical-cast/branch/master)  | [![Coverage Status](https://coveralls.io/repos/boostorg/lexical_cast/badge.png?branch=master)](https://coveralls.io/r/boostorg/lexical_cast?branch=master) | [details...](https://www.boost.org/development/tests/master/developer/lexical_cast.html)
 
-
-[Open Issues](https://svn.boost.org/trac/boost/query?status=!closed&component=lexical_cast)
+[Latest developer documentation](https://www.boost.org/doc/libs/develop/doc/html/boost_lexical_cast.html)
 
 ### License
 
-Distributed under the [Boost Software License, Version 1.0](http://boost.org/LICENSE_1_0.txt).
+Distributed under the [Boost Software License, Version 1.0](https://boost.org/LICENSE_1_0.txt).

build.jam

@@ -0,0 +1,26 @@
+# Copyright René Ferdinand Rivera Morell 2023-2024
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+require-b2 5.2 ;
+
+constant boost_dependencies :
+    /boost/config//boost_config
+    /boost/container//boost_container
+    /boost/core//boost_core
+    /boost/throw_exception//boost_throw_exception ;
+
+project /boost/lexical_cast
+    : common-requirements
+        <include>include
+    ;
+
+explicit
+    [ alias boost_lexical_cast : : : : <library>$(boost_dependencies) ]
+    [ alias all : boost_lexical_cast test ]
+    ;
+
+call-if : boost-library lexical_cast
+    ;
+

doc/Jamfile.v2

@@ -1,4 +1,6 @@
-# Copyright Antony Polukhin 2011. Use, modification, and distribution are
+# Copyright Antony Polukhin, 2011-2026.
+#
+# Use, modification, and distribution are
 # subject to the Boost Software License, Version 1.0. (See accompanying
 # file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
@@ -14,3 +16,12 @@ boostbook standalone
         <format>pdf:<xsl:param>boost.url.prefix=http://www.boost.org/doc/libs/release/doc/html
     ;
 
+###############################################################################
+alias boostdoc
+    : lexical_cast
+    :
+    :
+    : ;
+explicit boostdoc ;
+alias boostrelease ;
+explicit boostrelease ;

example/args_to_numbers.cpp

@@ -1,4 +1,4 @@
-// Copyright 2013 Antony Polukhin
+// Copyright Antony Polukhin, 2013-2026.
 
 // Distributed under the Boost Software License, Version 1.0.
 // (See the accompanying file LICENSE_1_0.txt
@@ -7,9 +7,10 @@
 //[lexical_cast_args_example
 //`The following example treats command line arguments as a sequence of numeric data
 
-#include <boost/lexical_cast.hpp>
 #include <vector>
 
+#include <boost/lexical_cast.hpp>
+
 int main(int /*argc*/, char * argv[])
 {
     using boost::lexical_cast;

example/generic_stringize.cpp

@@ -1,21 +1,31 @@
-// Copyright 2013 Antony Polukhin
+// Copyright Antony Polukhin, 2013-2026.
 
 // Distributed under the Boost Software License, Version 1.0.
 // (See the accompanying file LICENSE_1_0.txt
 // or a copy at <http://www.boost.org/LICENSE_1_0.txt>.)
 
+#include <boost/config.hpp>
+#ifdef BOOST_MSVC
+# pragma warning(disable: 4512) // generic_stringize.cpp(37) : warning C4512: 'stringize_functor' : assignment operator could not be generated
+#endif
 
 //[lexical_cast_stringize
 /*`
     In this example we'll make a `stringize` method that accepts a sequence, converts
     each element of the sequence into string and appends that string to the result.
 
-    Example is based on the example from the [@http://www.packtpub.com/boost-cplusplus-application-development-cookbook/book Boost C++ Application Development Cookbook]
-    by Antony Polukhin, ISBN 9781849514880.
+    Example is based on the example from the Boost C++ Application Development Cookbook
+    by Antony Polukhin, ISBN 9781849514880. Russian translation: [@https://dmkpress.com/catalog/computer/programming/c/978-5-97060-868-5/ ISBN: 9785970608685].
 
     Step 1: Making a functor that converts any type to a string and remembers result:
 */
 
+#include <string>
+
+#include <boost/fusion/include/for_each.hpp>
+#include <boost/fusion/adapted/std_tuple.hpp>
+#include <boost/fusion/adapted/std_pair.hpp>
+
 #include <boost/lexical_cast.hpp>
 
 struct stringize_functor {
@@ -34,7 +44,6 @@ public:
 };
 
 //` Step 2: Applying `stringize_functor` to each element in sequence:
-#include <boost/fusion/include/for_each.hpp>
 template <class Sequence>
 std::string stringize(const Sequence& seq) {
     std::string result;
@@ -43,16 +52,18 @@ std::string stringize(const Sequence& seq) {
 }
 
 //` Step 3: Using the `stringize` with different types:
-#include <cassert>
-#include <boost/fusion/adapted/boost_tuple.hpp>
-#include <boost/fusion/adapted/std_pair.hpp>
-
 int main() {
-    boost::tuple<char, int, char, int> decim('-', 10, 'e', 5);
-    assert(stringize(decim) == "-10e5");
+    std::tuple<char, int, char, int> decim('-', 10, 'e', 5);
+    if (stringize(decim) != "-10e5") {
+        return 1;
+    }
 
-    std::pair<short, std::string> value_and_type(270, "Kelvin");
-    assert(stringize(value_and_type) == "270Kelvin");
+    std::pair<int, std::string> value_and_type(270, "Kelvin");
+    if (stringize(value_and_type) != "270Kelvin") {
+        return 2;
+    }
+
+    return 0;
 }
 
 //] [/lexical_cast_stringize]

example/small_examples.cpp

@@ -1,15 +1,22 @@
-// Copyright 2013 Antony Polukhin
+// Copyright Antony Polukhin, 2013-2026.
 
 // Distributed under the Boost Software License, Version 1.0.
 // (See the accompanying file LICENSE_1_0.txt
 // or a copy at <http://www.boost.org/LICENSE_1_0.txt>.)
 
-#include <boost/lexical_cast.hpp>
+#include <array>
 #include <string>
+#include <string.h>
 #include <cstdio>
 
+#include <boost/lexical_cast.hpp>
+
+#ifdef BOOST_MSVC
+#  pragma warning(disable: 4996) // `strerror` is not safe
+#endif
+
 //[lexical_cast_log_errno
-//`The following example uses numeric data in a string expression: 
+//`The following example uses numeric data in a string expression:
 
 void log_message(const std::string &);
 
@@ -24,11 +31,11 @@ void log_errno(int yoko)
 //[lexical_cast_fixed_buffer
 //`The following example converts some number and puts it to file:
 
-void number_to_file(int number, FILE* file)
+void number_to_file(int number, std::FILE* file)
 {
-    typedef boost::array<char, 50> buf_t; // You can use std::array if your compiler supports it
+    using buf_t = std::array<char, 50>;
     buf_t buffer = boost::lexical_cast<buf_t>(number); // No dynamic memory allocation
-    std::fputs(buffer.begin(), file);
+    std::fputs(buffer.data(), file);
 }
 
 //] [/lexical_cast_fixed_buffer]

example/variant_to_long_double.cpp

@@ -1,4 +1,4 @@
-// Copyright 2013 Antony Polukhin
+// Copyright Antony Polukhin, 2013-2026.
 
 // Distributed under the Boost Software License, Version 1.0.
 // (See the accompanying file LICENSE_1_0.txt
@@ -10,15 +10,18 @@
     In this example we'll make a `to_long_double` method that converts value of the Boost.Variant to `long double`.
 */
 
-#include <boost/lexical_cast.hpp>
+#ifdef BOOST_USE_MODULES
+#include <compare>
+#endif
 #include <boost/variant.hpp>
-#include <cassert>
+
+#include <boost/lexical_cast.hpp>
 
 struct to_long_double_functor: boost::static_visitor<long double> {
     template <class T>
     long double operator()(const T& v) const {
-        // Lexical cast has many optimizations including optimizations for situations that usually 
-        // occur in generic programming, like std::string to std::string or arithmetic type to arithmetic type conversion. 
+        // Lexical cast has many optimizations including optimizations for situations that usually
+        // occur in generic programming, like std::string to std::string or arithmetic type to arithmetic type conversion.
         return boost::lexical_cast<long double>(v);
     }
 };
@@ -32,8 +35,12 @@ long double to_long_double(const Variant& v) {
 int main() {
     boost::variant<char, int, std::string> v1('0'), v2("10.0001"), v3(1);
 
-    long double sum = to_long_double(v1) + to_long_double(v2) + to_long_double(v3);
-    assert(sum > 11 && sum < 11.1);
+    const long double sum = to_long_double(v1) + to_long_double(v2) + to_long_double(v3);
+    if (11 < sum  && sum < 11.1) {
+        return 0;  // OK, as expected
+    };
+
+    return 1;      // FAIL
 }
 
 //] [/lexical_cast_variant_to_long_double]

include/boost/detail/basic_pointerbuf.hpp

@@ -18,7 +18,8 @@
 # pragma once
 #endif
 
-#include "boost/config.hpp"
+#include <boost/config.hpp>
+
 #include <streambuf>
 
 namespace boost { namespace detail {
@@ -39,25 +40,20 @@ protected:
    typedef typename base_type::off_type off_type;
 
 public:
-   basic_pointerbuf() : base_type() { setbuf(0, 0); }
+   basic_pointerbuf() : base_type() { this_type::setbuf(0, 0); }
    const charT* getnext() { return this->gptr(); }
 
-#ifndef BOOST_NO_USING_TEMPLATE
     using base_type::pptr;
     using base_type::pbase;
-#else
-    charT* pptr() const { return base_type::pptr(); }
-    charT* pbase() const { return base_type::pbase(); }
-#endif
 
 protected:
    // VC mistakenly assumes that `setbuf` and other functions are not referenced.
    // Marking those functions with `inline` suppresses the warnings.
    // There must be no harm from marking virtual functions as inline: inline virtual
    // call can be inlined ONLY when the compiler knows the "exact class".
-   inline base_type* setbuf(char_type* s, streamsize n);
-   inline typename this_type::pos_type seekpos(pos_type sp, ::std::ios_base::openmode which);
-   inline typename this_type::pos_type seekoff(off_type off, ::std::ios_base::seekdir way, ::std::ios_base::openmode which);
+   inline base_type* setbuf(char_type* s, streamsize n) BOOST_OVERRIDE;
+   inline typename this_type::pos_type seekpos(pos_type sp, ::std::ios_base::openmode which) BOOST_OVERRIDE;
+   inline typename this_type::pos_type seekoff(off_type off, ::std::ios_base::seekdir way, ::std::ios_base::openmode which) BOOST_OVERRIDE;
 
 private:
    basic_pointerbuf& operator=(const basic_pointerbuf&);
@@ -76,7 +72,7 @@ template<class charT, class BufferT>
 typename basic_pointerbuf<charT, BufferT>::pos_type
 basic_pointerbuf<charT, BufferT>::seekoff(off_type off, ::std::ios_base::seekdir way, ::std::ios_base::openmode which)
 {
-   typedef typename boost::int_t<sizeof(way) * CHAR_BIT>::least cast_type;
+   typedef ::std::ios_base::seekdir cast_type;
 
    if(which & ::std::ios_base::out)
       return pos_type(off_type(-1));
@@ -136,4 +132,3 @@ basic_pointerbuf<charT, BufferT>::seekpos(pos_type sp, ::std::ios_base::openmode
 }} // namespace boost::detail
 
 #endif // BOOST_DETAIL_BASIC_POINTERBUF_HPP
-

include/boost/detail/lcast_precision.hpp

@@ -1,184 +0,0 @@
-// Copyright Alexander Nasonov & Paul A. Bristow 2006.
-
-// Use, modification and distribution are subject to the
-// Boost Software License, Version 1.0.
-// (See accompanying file LICENSE_1_0.txt
-// or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-#ifndef BOOST_DETAIL_LCAST_PRECISION_HPP_INCLUDED
-#define BOOST_DETAIL_LCAST_PRECISION_HPP_INCLUDED
-
-#include <climits>
-#include <ios>
-#include <limits>
-
-#include <boost/config.hpp>
-#include <boost/integer_traits.hpp>
-
-#ifndef BOOST_NO_IS_ABSTRACT
-// Fix for SF:1358600 - lexical_cast & pure virtual functions & VC 8 STL
-#include <boost/mpl/if.hpp>
-#include <boost/type_traits/is_abstract.hpp>
-#endif
-
-#if defined(BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS) || \
-  (defined(BOOST_MSVC) && (BOOST_MSVC<1310))
-
-#define BOOST_LCAST_NO_COMPILE_TIME_PRECISION
-#endif
-
-#ifdef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
-#include <boost/assert.hpp>
-#else
-#include <boost/static_assert.hpp>
-#endif
-
-namespace boost { namespace detail {
-
-class lcast_abstract_stub {};
-
-#ifndef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
-// Calculate an argument to pass to std::ios_base::precision from
-// lexical_cast. See alternative implementation for broken standard
-// libraries in lcast_get_precision below. Keep them in sync, please.
-template<class T>
-struct lcast_precision
-{
-#ifdef BOOST_NO_IS_ABSTRACT
-    typedef std::numeric_limits<T> limits; // No fix for SF:1358600.
-#else
-    typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_<
-        boost::is_abstract<T>
-      , std::numeric_limits<lcast_abstract_stub>
-      , std::numeric_limits<T>
-      >::type limits;
-#endif
-
-    BOOST_STATIC_CONSTANT(bool, use_default_precision =
-            !limits::is_specialized || limits::is_exact
-        );
-
-    BOOST_STATIC_CONSTANT(bool, is_specialized_bin =
-            !use_default_precision &&
-            limits::radix == 2 && limits::digits > 0
-        );
-
-    BOOST_STATIC_CONSTANT(bool, is_specialized_dec =
-            !use_default_precision &&
-            limits::radix == 10 && limits::digits10 > 0
-        );
-
-    BOOST_STATIC_CONSTANT(std::streamsize, streamsize_max =
-            boost::integer_traits<std::streamsize>::const_max
-        );
-
-    BOOST_STATIC_CONSTANT(unsigned int, precision_dec = limits::digits10 + 1U);
-
-    BOOST_STATIC_ASSERT(!is_specialized_dec ||
-            precision_dec <= streamsize_max + 0UL
-        );
-
-    BOOST_STATIC_CONSTANT(unsigned long, precision_bin =
-            2UL + limits::digits * 30103UL / 100000UL
-        );
-
-    BOOST_STATIC_ASSERT(!is_specialized_bin ||
-            (limits::digits + 0UL < ULONG_MAX / 30103UL &&
-            precision_bin > limits::digits10 + 0UL &&
-            precision_bin <= streamsize_max + 0UL)
-        );
-
-    BOOST_STATIC_CONSTANT(std::streamsize, value =
-            is_specialized_bin ? precision_bin
-                               : is_specialized_dec ? precision_dec : 6
-        );
-};
-#endif
-
-template<class T>
-inline std::streamsize lcast_get_precision(T* = 0)
-{
-#ifndef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
-    return lcast_precision<T>::value;
-#else // Follow lcast_precision algorithm at run-time:
-
-#ifdef BOOST_NO_IS_ABSTRACT
-    typedef std::numeric_limits<T> limits; // No fix for SF:1358600.
-#else
-    typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_<
-        boost::is_abstract<T>
-      , std::numeric_limits<lcast_abstract_stub>
-      , std::numeric_limits<T>
-      >::type limits;
-#endif
-
-    bool const use_default_precision =
-        !limits::is_specialized || limits::is_exact;
-
-    if(!use_default_precision)
-    { // Includes all built-in floating-point types, float, double ...
-      // and UDT types for which digits (significand bits) is defined (not zero)
-
-        bool const is_specialized_bin =
-            limits::radix == 2 && limits::digits > 0;
-        bool const is_specialized_dec =
-            limits::radix == 10 && limits::digits10 > 0;
-        std::streamsize const streamsize_max =
-            (boost::integer_traits<std::streamsize>::max)();
-
-        if(is_specialized_bin)
-        { // Floating-point types with
-          // limits::digits defined by the specialization.
-
-            unsigned long const digits = limits::digits;
-            unsigned long const precision = 2UL + digits * 30103UL / 100000UL;
-            // unsigned long is selected because it is at least 32-bits
-            // and thus ULONG_MAX / 30103UL is big enough for all types.
-            BOOST_ASSERT(
-                    digits < ULONG_MAX / 30103UL &&
-                    precision > limits::digits10 + 0UL &&
-                    precision <= streamsize_max + 0UL
-                );
-            return precision;
-        }
-        else if(is_specialized_dec)
-        {   // Decimal Floating-point type, most likely a User Defined Type
-            // rather than a real floating-point hardware type.
-            unsigned int const precision = limits::digits10 + 1U;
-            BOOST_ASSERT(precision <= streamsize_max + 0UL);
-            return precision;
-        }
-    }
-
-    // Integral type (for which precision has no effect)
-    // or type T for which limits is NOT specialized,
-    // so assume stream precision remains the default 6 decimal digits.
-    // Warning: if your User-defined Floating-point type T is NOT specialized,
-    // then you may lose accuracy by only using 6 decimal digits.
-    // To avoid this, you need to specialize T with either
-    // radix == 2 and digits == the number of significand bits,
-    // OR
-    // radix = 10 and digits10 == the number of decimal digits.
-
-    return 6;
-#endif
-}
-
-template<class T>
-inline void lcast_set_precision(std::ios_base& stream, T*)
-{
-    stream.precision(lcast_get_precision<T>());
-}
-
-template<class Source, class Target>
-inline void lcast_set_precision(std::ios_base& stream, Source*, Target*)
-{
-    std::streamsize const s = lcast_get_precision(static_cast<Source*>(0));
-    std::streamsize const t = lcast_get_precision(static_cast<Target*>(0));
-    stream.precision(s > t ? s : t);
-}
-
-}}
-
-#endif //  BOOST_DETAIL_LCAST_PRECISION_HPP_INCLUDED
-

include/boost/lexical_cast.hpp

@@ -1,6 +1,6 @@
 // Copyright Kevlin Henney, 2000-2005.
 // Copyright Alexander Nasonov, 2006-2010.
-// Copyright Antony Polukhin, 2011-2014.
+// Copyright Antony Polukhin, 2011-2026.
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -18,25 +18,33 @@
 #ifndef BOOST_LEXICAL_CAST_INCLUDED
 #define BOOST_LEXICAL_CAST_INCLUDED
 
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 #include <boost/config.hpp>
 #ifdef BOOST_HAS_PRAGMA_ONCE
 #   pragma once
 #endif
+#endif
 
 #if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
 #define BOOST_LCAST_NO_WCHAR_T
 #endif
 
-#include <boost/range/iterator_range_core.hpp>
+#include <boost/lexical_cast/detail/buffer_view.hpp>
+
 #include <boost/lexical_cast/bad_lexical_cast.hpp>
 #include <boost/lexical_cast/try_lexical_convert.hpp>
 
-namespace boost 
+namespace boost
 {
+BOOST_LEXICAL_CAST_BEGIN_MODULE_EXPORT
     template <typename Target, typename Source>
     inline Target lexical_cast(const Source &arg)
     {
-        Target result;
+        Target result = Target();
 
         if (!boost::conversion::detail::try_lexical_convert(arg, result)) {
             boost::conversion::detail::throw_bad_cast<Source, Target>();
@@ -49,7 +57,7 @@ namespace boost
     inline Target lexical_cast(const char* chars, std::size_t count)
     {
         return ::boost::lexical_cast<Target>(
-            ::boost::iterator_range<const char*>(chars, chars + count)
+            ::boost::conversion::detail::make_buffer_view(chars, chars + count)
         );
     }
 
@@ -57,7 +65,7 @@ namespace boost
     inline Target lexical_cast(const unsigned char* chars, std::size_t count)
     {
         return ::boost::lexical_cast<Target>(
-            ::boost::iterator_range<const unsigned char*>(chars, chars + count)
+            ::boost::conversion::detail::make_buffer_view(chars, chars + count)
         );
     }
 
@@ -65,7 +73,7 @@ namespace boost
     inline Target lexical_cast(const signed char* chars, std::size_t count)
     {
         return ::boost::lexical_cast<Target>(
-            ::boost::iterator_range<const signed char*>(chars, chars + count)
+            ::boost::conversion::detail::make_buffer_view(chars, chars + count)
         );
     }
 
@@ -74,32 +82,31 @@ namespace boost
     inline Target lexical_cast(const wchar_t* chars, std::size_t count)
     {
         return ::boost::lexical_cast<Target>(
-            ::boost::iterator_range<const wchar_t*>(chars, chars + count)
+            ::boost::conversion::detail::make_buffer_view(chars, chars + count)
         );
     }
 #endif
-#ifndef BOOST_NO_CXX11_CHAR16_T
     template <typename Target>
     inline Target lexical_cast(const char16_t* chars, std::size_t count)
     {
         return ::boost::lexical_cast<Target>(
-            ::boost::iterator_range<const char16_t*>(chars, chars + count)
+            ::boost::conversion::detail::make_buffer_view(chars, chars + count)
         );
     }
-#endif
-#ifndef BOOST_NO_CXX11_CHAR32_T
     template <typename Target>
     inline Target lexical_cast(const char32_t* chars, std::size_t count)
     {
         return ::boost::lexical_cast<Target>(
-            ::boost::iterator_range<const char32_t*>(chars, chars + count)
+            ::boost::conversion::detail::make_buffer_view(chars, chars + count)
         );
     }
-#endif
 
+BOOST_LEXICAL_CAST_END_MODULE_EXPORT
 } // namespace boost
 
 #undef BOOST_LCAST_NO_WCHAR_T
 
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
 #endif // BOOST_LEXICAL_CAST_INCLUDED
 

include/boost/lexical_cast/bad_lexical_cast.hpp

@@ -1,6 +1,6 @@
 // Copyright Kevlin Henney, 2000-2005.
 // Copyright Alexander Nasonov, 2006-2010.
-// Copyright Antony Polukhin, 2011-2014.
+// Copyright Antony Polukhin, 2011-2026.
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -18,67 +18,76 @@
 #ifndef BOOST_LEXICAL_CAST_BAD_LEXICAL_CAST_HPP
 #define BOOST_LEXICAL_CAST_BAD_LEXICAL_CAST_HPP
 
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 #include <boost/config.hpp>
 #ifdef BOOST_HAS_PRAGMA_ONCE
 #   pragma once
 #endif
 
-#include <typeinfo>
 #include <exception>
+#include <typeinfo>
 #include <boost/throw_exception.hpp>
+#endif
 
 namespace boost
 {
+BOOST_LEXICAL_CAST_BEGIN_MODULE_EXPORT
     // exception used to indicate runtime lexical_cast failure
     class BOOST_SYMBOL_VISIBLE bad_lexical_cast :
-    // workaround MSVC bug with std::bad_cast when _HAS_EXCEPTIONS == 0 
-#if defined(BOOST_MSVC) && defined(_HAS_EXCEPTIONS) && !_HAS_EXCEPTIONS 
-        public std::exception 
-#else 
-        public std::bad_cast 
-#endif 
-
-#if defined(__BORLANDC__) && BOOST_WORKAROUND( __BORLANDC__, < 0x560 )
-        // under bcc32 5.5.1 bad_cast doesn't derive from exception
-        , public std::exception
+    // workaround MSVC bug with std::bad_cast when _HAS_EXCEPTIONS == 0
+#if defined(BOOST_MSVC) && defined(_HAS_EXCEPTIONS) && !_HAS_EXCEPTIONS
+        public std::exception
+#else
+        public std::bad_cast
 #endif
-
     {
     public:
-        bad_lexical_cast() BOOST_NOEXCEPT
+        bad_lexical_cast() noexcept
 #ifndef BOOST_NO_TYPEID
            : source(&typeid(void)), target(&typeid(void))
 #endif
         {}
 
-        virtual const char *what() const BOOST_NOEXCEPT_OR_NOTHROW {
+        const char *what() const BOOST_NOEXCEPT_OR_NOTHROW BOOST_OVERRIDE {
             return "bad lexical cast: "
                    "source type value could not be interpreted as target";
         }
 
-        virtual ~bad_lexical_cast() BOOST_NOEXCEPT_OR_NOTHROW
-        {}
+        bad_lexical_cast(const bad_lexical_cast&) = default;
+        bad_lexical_cast& operator=(const bad_lexical_cast&) = default;
 
 #ifndef BOOST_NO_TYPEID
+    private:
+#ifdef BOOST_NO_STD_TYPEINFO
+        typedef ::type_info type_info_t;
+#else
+        typedef ::std::type_info type_info_t;
+#endif
+    public:
         bad_lexical_cast(
-                const std::type_info &source_type_arg,
-                const std::type_info &target_type_arg) BOOST_NOEXCEPT
+                const type_info_t &source_type_arg,
+                const type_info_t &target_type_arg) noexcept
             : source(&source_type_arg), target(&target_type_arg)
         {}
 
-        const std::type_info &source_type() const BOOST_NOEXCEPT {
+        const type_info_t &source_type() const noexcept {
             return *source;
         }
 
-        const std::type_info &target_type() const BOOST_NOEXCEPT {
+        const type_info_t &target_type() const noexcept {
             return *target;
         }
 
     private:
-        const std::type_info *source;
-        const std::type_info *target;
+        const type_info_t *source;
+        const type_info_t *target;
 #endif
     };
+BOOST_LEXICAL_CAST_END_MODULE_EXPORT
 
     namespace conversion { namespace detail {
 #ifdef BOOST_NO_TYPEID
@@ -94,8 +103,8 @@ namespace boost
 #endif
     }} // namespace conversion::detail
 
-
 } // namespace boost
 
-#endif // BOOST_LEXICAL_CAST_BAD_LEXICAL_CAST_HPP
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
 
+#endif // BOOST_LEXICAL_CAST_BAD_LEXICAL_CAST_HPP

include/boost/lexical_cast/detail/buffer_view.hpp

@@ -0,0 +1,67 @@
+// Copyright Antony Polukhin, 2011-2026.
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_LEXICAL_CAST_DETAIL_BUFFER_VIEW_HPP
+#define BOOST_LEXICAL_CAST_DETAIL_BUFFER_VIEW_HPP
+
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
+#include <boost/config.hpp>
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#   pragma once
+#endif
+
+#include <iosfwd>
+#endif
+
+namespace boost { namespace conversion { namespace detail {
+
+    template < typename CharT >
+    struct buffer_view {
+        const CharT* begin;
+        const CharT* end;
+    };
+
+    template < typename CharT >
+    buffer_view<CharT> make_buffer_view(const CharT* begin, const CharT* end) {
+        return buffer_view<CharT>{begin, end};
+    }
+
+    inline buffer_view<char> make_buffer_view(const signed char* begin, const signed char* end) {
+        return buffer_view<char>{
+            reinterpret_cast<const char*>(begin),
+            reinterpret_cast<const char*>(end)
+        };
+    }
+
+    inline buffer_view<char> make_buffer_view(const unsigned char* begin, const unsigned char* end) {
+        return buffer_view<char>{
+            reinterpret_cast<const char*>(begin),
+            reinterpret_cast<const char*>(end)
+        };
+    }
+
+    template< typename CharT, typename Elem, typename Traits >
+    std::basic_ostream<Elem,Traits>& operator<<( 
+                std::basic_ostream<Elem, Traits>& os,
+                buffer_view<CharT> r)
+    {
+        while (r.begin != r.end) {
+          os << r.begin[0];
+          ++r.begin;
+        }
+        return os;
+    }
+
+}}}  // namespace boost::conversion::detail
+
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#endif // BOOST_LEXICAL_CAST_DETAIL_BUFFER_VIEW_HPP
+

include/boost/lexical_cast/detail/config.hpp

@@ -0,0 +1,22 @@
+// Copyright Antony Polukhin, 2021-2026.
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_LEXICAL_CAST_DETAIL_CONFIG_HPP
+#define BOOST_LEXICAL_CAST_DETAIL_CONFIG_HPP
+
+#ifdef BOOST_LEXICAL_CAST_INTERFACE_UNIT
+#   define BOOST_LEXICAL_CAST_BEGIN_MODULE_EXPORT export {
+#   define BOOST_LEXICAL_CAST_END_MODULE_EXPORT }
+#else
+#   define BOOST_LEXICAL_CAST_BEGIN_MODULE_EXPORT
+#   define BOOST_LEXICAL_CAST_END_MODULE_EXPORT
+#endif
+
+#if defined(BOOST_USE_MODULES) && !defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+import boost.lexical_cast;
+#endif
+
+#endif  // #ifndef BOOST_LEXICAL_CAST_DETAIL_CONFIG_HPP

include/boost/lexical_cast/detail/converter_lexical.hpp

@@ -1,6 +1,6 @@
 // Copyright Kevlin Henney, 2000-2005.
 // Copyright Alexander Nasonov, 2006-2010.
-// Copyright Antony Polukhin, 2011-2014.
+// Copyright Antony Polukhin, 2011-2026.
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -18,6 +18,11 @@
 #ifndef BOOST_LEXICAL_CAST_DETAIL_CONVERTER_LEXICAL_HPP
 #define BOOST_LEXICAL_CAST_DETAIL_CONVERTER_LEXICAL_HPP
 
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 #include <boost/config.hpp>
 #ifdef BOOST_HAS_PRAGMA_ONCE
 #   pragma once
@@ -27,59 +32,64 @@
 #define BOOST_LCAST_NO_WCHAR_T
 #endif
 
+#include <array>
 #include <cstddef>
 #include <string>
+#include <type_traits>
 #include <boost/limits.hpp>
-#include <boost/mpl/bool.hpp>
-#include <boost/mpl/identity.hpp>
-#include <boost/mpl/if.hpp>
-#include <boost/type_traits/is_integral.hpp>
-#include <boost/type_traits/is_float.hpp>
-#include <boost/type_traits/has_left_shift.hpp>
-#include <boost/type_traits/has_right_shift.hpp>
-#include <boost/static_assert.hpp>
-#include <boost/detail/lcast_precision.hpp>
 
-#include <boost/lexical_cast/detail/widest_char.hpp>
-#include <boost/lexical_cast/detail/is_character.hpp>
-
-#ifndef BOOST_NO_CXX11_HDR_ARRAY
 #include <array>
+
+#ifndef BOOST_NO_CXX17_HDR_STRING_VIEW
+#include <string_view>
 #endif
 
-#include <boost/array.hpp>
-#include <boost/range/iterator_range_core.hpp>
 #include <boost/container/container_fwd.hpp>
 
+#endif  // #ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
+
+#include <boost/lexical_cast/detail/lcast_precision.hpp>
+#include <boost/lexical_cast/detail/widest_char.hpp>
+#include <boost/lexical_cast/detail/is_character.hpp>
+#include <boost/lexical_cast/detail/buffer_view.hpp>
 #include <boost/lexical_cast/detail/converter_lexical_streams.hpp>
 
 namespace boost {
 
+    // Forward declaration
+    template<class T, std::size_t N>
+    class array;
+    template<class IteratorT>
+    class iterator_range;
+
+    // Forward declaration of boost::basic_string_view from Utility
+    template<class Ch, class Tr> class basic_string_view;
+
     namespace detail // normalize_single_byte_char<Char>
     {
         // Converts signed/unsigned char to char
         template < class Char >
-        struct normalize_single_byte_char 
+        struct normalize_single_byte_char
         {
-            typedef Char type;
+            using type = Char;
         };
 
         template <>
         struct normalize_single_byte_char< signed char >
         {
-            typedef char type;
+            using type = char;
         };
 
         template <>
         struct normalize_single_byte_char< unsigned char >
         {
-            typedef char type;
+            using type = char;
         };
     }
 
     namespace detail // deduce_character_type_later<T>
     {
-        // Helper type, meaning that stram character for T must be deduced 
+        // Helper type, meaning that stram character for T must be deduced
         // at Stage 2 (See deduce_source_char<T> and deduce_target_char<T>)
         template < class T > struct deduce_character_type_later {};
     }
@@ -90,35 +100,41 @@ namespace boost {
         // Returns one of char, wchar_t, char16_t, char32_t or deduce_character_type_later<T> types
         // Executed on Stage 1 (See deduce_source_char<T> and deduce_target_char<T>)
         template < typename Type >
-        struct stream_char_common: public boost::mpl::if_c<
+        struct stream_char_common: public std::conditional<
             boost::detail::is_character< Type >::value,
             Type,
             boost::detail::deduce_character_type_later< Type >
         > {};
 
         template < typename Char >
-        struct stream_char_common< Char* >: public boost::mpl::if_c<
+        struct stream_char_common< Char* >: public std::conditional<
             boost::detail::is_character< Char >::value,
             Char,
             boost::detail::deduce_character_type_later< Char* >
         > {};
 
         template < typename Char >
-        struct stream_char_common< const Char* >: public boost::mpl::if_c<
+        struct stream_char_common< const Char* >: public std::conditional<
             boost::detail::is_character< Char >::value,
             Char,
             boost::detail::deduce_character_type_later< const Char* >
         > {};
 
         template < typename Char >
-        struct stream_char_common< boost::iterator_range< Char* > >: public boost::mpl::if_c<
+        struct stream_char_common< boost::conversion::detail::buffer_view< Char > >
+        {
+            using type = Char;
+        };
+
+        template < typename Char >
+        struct stream_char_common< boost::iterator_range< Char* > >: public std::conditional<
             boost::detail::is_character< Char >::value,
             Char,
             boost::detail::deduce_character_type_later< boost::iterator_range< Char* > >
         > {};
-    
+
         template < typename Char >
-        struct stream_char_common< boost::iterator_range< const Char* > >: public boost::mpl::if_c<
+        struct stream_char_common< boost::iterator_range< const Char* > >: public std::conditional<
             boost::detail::is_character< Char >::value,
             Char,
             boost::detail::deduce_character_type_later< boost::iterator_range< const Char* > >
@@ -127,24 +143,24 @@ namespace boost {
         template < class Char, class Traits, class Alloc >
         struct stream_char_common< std::basic_string< Char, Traits, Alloc > >
         {
-            typedef Char type;
+            using type = Char;
         };
 
         template < class Char, class Traits, class Alloc >
         struct stream_char_common< boost::container::basic_string< Char, Traits, Alloc > >
         {
-            typedef Char type;
+            using type = Char;
         };
 
         template < typename Char, std::size_t N >
-        struct stream_char_common< boost::array< Char, N > >: public boost::mpl::if_c<
+        struct stream_char_common< boost::array< Char, N > >: public std::conditional<
             boost::detail::is_character< Char >::value,
             Char,
             boost::detail::deduce_character_type_later< boost::array< Char, N > >
         > {};
 
         template < typename Char, std::size_t N >
-        struct stream_char_common< boost::array< const Char, N > >: public boost::mpl::if_c<
+        struct stream_char_common< boost::array< const Char, N > >: public std::conditional<
             boost::detail::is_character< Char >::value,
             Char,
             boost::detail::deduce_character_type_later< boost::array< const Char, N > >
@@ -152,30 +168,49 @@ namespace boost {
 
 #ifndef BOOST_NO_CXX11_HDR_ARRAY
         template < typename Char, std::size_t N >
-        struct stream_char_common< std::array<Char, N > >: public boost::mpl::if_c<
+        struct stream_char_common< std::array<Char, N > >: public std::conditional<
             boost::detail::is_character< Char >::value,
             Char,
             boost::detail::deduce_character_type_later< std::array< Char, N > >
         > {};
 
         template < typename Char, std::size_t N >
-        struct stream_char_common< std::array< const Char, N > >: public boost::mpl::if_c<
+        struct stream_char_common< std::array< const Char, N > >: public std::conditional<
             boost::detail::is_character< Char >::value,
             Char,
             boost::detail::deduce_character_type_later< std::array< const Char, N > >
         > {};
 #endif
 
+#ifndef BOOST_NO_CXX17_HDR_STRING_VIEW
+        template < class Char, class Traits >
+        struct stream_char_common< std::basic_string_view< Char, Traits > >
+        {
+            using type = Char;
+        };
+#endif
+        template < class Char, class Traits >
+        struct stream_char_common< boost::basic_string_view< Char, Traits > >
+        {
+            using type = Char;
+        };
+
 #ifdef BOOST_HAS_INT128
-        template <> struct stream_char_common< boost::int128_type >: public boost::mpl::identity< char > {};
-        template <> struct stream_char_common< boost::uint128_type >: public boost::mpl::identity< char > {};
+        template <> struct stream_char_common< boost::int128_type >
+        {
+            using type = char;
+        };
+        template <> struct stream_char_common< boost::uint128_type >
+        {
+            using type = char;
+        };
 #endif
 
 #if !defined(BOOST_LCAST_NO_WCHAR_T) && defined(BOOST_NO_INTRINSIC_WCHAR_T)
         template <>
         struct stream_char_common< wchar_t >
         {
-            typedef char type;
+            using type = char;
         };
 #endif
     }
@@ -183,33 +218,42 @@ namespace boost {
     namespace detail // deduce_source_char_impl<T>
     {
         // If type T is `deduce_character_type_later` type, then tries to deduce
-        // character type using boost::has_left_shift<T> metafunction.
+        // character type using streaming metafunctions.
         // Otherwise supplied type T is a character type, that must be normalized
         // using normalize_single_byte_char<Char>.
         // Executed at Stage 2  (See deduce_source_char<T> and deduce_target_char<T>)
-        template < class Char > 
+        template < class Char >
         struct deduce_source_char_impl
-        { 
-            typedef BOOST_DEDUCED_TYPENAME boost::detail::normalize_single_byte_char< Char >::type type; 
-        };
-        
-        template < class T > 
-        struct deduce_source_char_impl< deduce_character_type_later< T > > 
         {
-            typedef boost::has_left_shift< std::basic_ostream< char >, T > result_t;
+            typedef typename boost::detail::normalize_single_byte_char< Char >::type type;
+        };
 
-#if defined(BOOST_LCAST_NO_WCHAR_T)
-            BOOST_STATIC_ASSERT_MSG((result_t::value), 
-                "Source type is not std::ostream`able and std::wostream`s are not supported by your STL implementation");
-            typedef char type;
-#else
-            typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c<
-                result_t::value, char, wchar_t
-            >::type type;
+        template < class T >
+        struct deduce_source_char_impl< deduce_character_type_later< T > >
+        {
+            template <class U>
+            static auto left_shift_type(long)
+                -> decltype( std::declval<std::basic_ostream< char >&>() << std::declval<const U&>(), char{});
 
-            BOOST_STATIC_ASSERT_MSG((result_t::value || boost::has_left_shift< std::basic_ostream< type >, T >::value), 
-                "Source type is neither std::ostream`able nor std::wostream`able");
+#if !defined(BOOST_LCAST_NO_WCHAR_T)
+            template <class U>
+            static auto left_shift_type(int)
+                -> decltype( std::declval<std::basic_ostream< wchar_t >&>() << std::declval<const U&>(), wchar_t{});
 #endif
+
+            template <class U>
+            static void left_shift_type(...);
+
+            using type = decltype(left_shift_type<T>(1L));
+
+            static_assert(!std::is_same<type, void>::value,
+#if defined(BOOST_LCAST_NO_WCHAR_T)
+                "Source type is not std::ostream`able and std::wostream`s are "
+                "not supported by your STL implementation"
+#else
+                "Source type is neither std::ostream`able nor std::wostream`able"
+#endif
+            );
         };
     }
 
@@ -220,91 +264,70 @@ namespace boost {
         // Otherwise supplied type T is a character type, that must be normalized
         // using normalize_single_byte_char<Char>.
         // Executed at Stage 2  (See deduce_source_char<T> and deduce_target_char<T>)
-        template < class Char > 
-        struct deduce_target_char_impl 
-        { 
-            typedef BOOST_DEDUCED_TYPENAME normalize_single_byte_char< Char >::type type; 
+        template < class Char >
+        struct deduce_target_char_impl
+        {
+            typedef typename normalize_single_byte_char< Char >::type type;
         };
-        
-        template < class T > 
-        struct deduce_target_char_impl< deduce_character_type_later<T> > 
-        { 
-            typedef boost::has_right_shift<std::basic_istream<char>, T > result_t;
 
-#if defined(BOOST_LCAST_NO_WCHAR_T)
-            BOOST_STATIC_ASSERT_MSG((result_t::value), 
-                "Target type is not std::istream`able and std::wistream`s are not supported by your STL implementation");
-            typedef char type;
-#else
-            typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c<
-                result_t::value, char, wchar_t
-            >::type type;
-            
-            BOOST_STATIC_ASSERT_MSG((result_t::value || boost::has_right_shift<std::basic_istream<wchar_t>, T >::value), 
-                "Target type is neither std::istream`able nor std::wistream`able");
+        template < class T >
+        struct deduce_target_char_impl< deduce_character_type_later<T> >
+        {
+            template <class U>
+            static auto right_shift_type(long)
+                -> decltype( std::declval<std::basic_istream< char >&>() >> std::declval<U&>(), char{});
+
+#if !defined(BOOST_LCAST_NO_WCHAR_T)
+            template <class U>
+            static auto right_shift_type(int)
+                -> decltype( std::declval<std::basic_istream< wchar_t >&>() >> std::declval<U&>(), wchar_t{});
 #endif
+
+            template <class U>
+            static void right_shift_type(...);
+
+            using type = decltype(right_shift_type<T>(1L));
+
+            static_assert(!std::is_same<type, void>::value,
+#if defined(BOOST_LCAST_NO_WCHAR_T)
+               "Target type is not std::istream`able and std::wistream`s are "
+               "not supported by your STL implementation"
+#else
+               "Target type is neither std::istream`able nor std::wistream`able"
+#endif
+            );
         };
-    } 
+    }
 
     namespace detail  // deduce_target_char<T> and deduce_source_char<T>
     {
         // We deduce stream character types in two stages.
         //
-        // Stage 1 is common for Target and Source. At Stage 1 we get 
+        // Stage 1 is common for Target and Source. At Stage 1 we get
         // non normalized character type (may contain unsigned/signed char)
         // or deduce_character_type_later<T> where T is the original type.
         // Stage 1 is executed by stream_char_common<T>
         //
-        // At Stage 2 we normalize character types or try to deduce character 
-        // type using metafunctions. 
-        // Stage 2 is executed by deduce_target_char_impl<T> and 
+        // At Stage 2 we normalize character types or try to deduce character
+        // type using metafunctions.
+        // Stage 2 is executed by deduce_target_char_impl<T> and
         // deduce_source_char_impl<T>
         //
-        // deduce_target_char<T> and deduce_source_char<T> functions combine 
+        // deduce_target_char<T> and deduce_source_char<T> functions combine
         // both stages
 
         template < class T >
         struct deduce_target_char
         {
-            typedef BOOST_DEDUCED_TYPENAME stream_char_common< T >::type stage1_type;
-            typedef BOOST_DEDUCED_TYPENAME deduce_target_char_impl< stage1_type >::type stage2_type;
-
-            typedef stage2_type type;
+            typedef typename stream_char_common< T >::type stage1_type;
+            typedef typename deduce_target_char_impl< stage1_type >::type type;
         };
 
         template < class T >
         struct deduce_source_char
         {
-            typedef BOOST_DEDUCED_TYPENAME stream_char_common< T >::type stage1_type;
-            typedef BOOST_DEDUCED_TYPENAME deduce_source_char_impl< stage1_type >::type stage2_type;
-
-            typedef stage2_type type;
-        };
-    }
-
-    namespace detail // extract_char_traits template
-    {
-        // We are attempting to get char_traits<> from T
-        // template parameter. Otherwise we'll be using std::char_traits<Char>
-        template < class Char, class T >
-        struct extract_char_traits
-                : boost::false_type
-        {
-            typedef std::char_traits< Char > trait_t;
-        };
-
-        template < class Char, class Traits, class Alloc >
-        struct extract_char_traits< Char, std::basic_string< Char, Traits, Alloc > >
-            : boost::true_type
-        {
-            typedef Traits trait_t;
-        };
-
-        template < class Char, class Traits, class Alloc>
-        struct extract_char_traits< Char, boost::container::basic_string< Char, Traits, Alloc > >
-            : boost::true_type
-        {
-            typedef Traits trait_t;
+            typedef typename stream_char_common< T >::type stage1_type;
+            typedef typename deduce_source_char_impl< stage1_type >::type type;
         };
     }
 
@@ -322,7 +345,7 @@ namespace boost {
             typedef const T * type;
         };
     }
-    
+
     namespace detail // lcast_src_length
     {
         // Return max. length of string representation of Source;
@@ -349,26 +372,21 @@ namespace boost {
         // When is_specialized is false, the whole expression is 0.
         template <class Source>
         struct lcast_src_length<
-                    Source, BOOST_DEDUCED_TYPENAME boost::enable_if<boost::is_integral<Source> >::type
+                    Source, typename std::enable_if<boost::detail::lcast::is_integral<Source>::value >::type
                 >
         {
-#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
             BOOST_STATIC_CONSTANT(std::size_t, value =
                   std::numeric_limits<Source>::is_signed +
                   std::numeric_limits<Source>::is_specialized + /* == 1 */
                   std::numeric_limits<Source>::digits10 * 2
               );
-#else
-            BOOST_STATIC_CONSTANT(std::size_t, value = 156);
-            BOOST_STATIC_ASSERT(sizeof(Source) * CHAR_BIT <= 256);
-#endif
         };
 
         // Helper for floating point types.
         // -1.23456789e-123456
         // ^                   sign
         //  ^                  leading digit
-        //   ^                 decimal point 
+        //   ^                 decimal point
         //    ^^^^^^^^         lcast_precision<Source>::value
         //            ^        "e"
         //             ^       exponent sign
@@ -376,22 +394,17 @@ namespace boost {
         // sign + leading digit + decimal point + "e" + exponent sign == 5
         template<class Source>
         struct lcast_src_length<
-                Source, BOOST_DEDUCED_TYPENAME boost::enable_if<boost::is_float<Source> >::type
+                Source, typename std::enable_if<std::is_floating_point<Source>::value >::type
             >
         {
-
-#ifndef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
-            BOOST_STATIC_ASSERT(
+            static_assert(
                     std::numeric_limits<Source>::max_exponent10 <=  999999L &&
                     std::numeric_limits<Source>::min_exponent10 >= -999999L
-                );
+                , "");
 
             BOOST_STATIC_CONSTANT(std::size_t, value =
                     5 + lcast_precision<Source>::value + 6
                 );
-#else // #ifndef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
-            BOOST_STATIC_CONSTANT(std::size_t, value = 156);
-#endif // #ifndef BOOST_LCAST_NO_COMPILE_TIME_PRECISION
         };
     }
 
@@ -399,60 +412,34 @@ namespace boost {
     {
         template <class Source, class Target>
         struct lexical_cast_stream_traits {
-            typedef BOOST_DEDUCED_TYPENAME boost::detail::array_to_pointer_decay<Source>::type src;
-            typedef BOOST_DEDUCED_TYPENAME boost::remove_cv<src>::type            no_cv_src;
-                
+            typedef typename boost::detail::array_to_pointer_decay<Source>::type src;
+            typedef typename std::remove_cv<src>::type            no_cv_src;
+
             typedef boost::detail::deduce_source_char<no_cv_src>                           deduce_src_char_metafunc;
-            typedef BOOST_DEDUCED_TYPENAME deduce_src_char_metafunc::type           src_char_t;
-            typedef BOOST_DEDUCED_TYPENAME boost::detail::deduce_target_char<Target>::type target_char_t;
-                
-            typedef BOOST_DEDUCED_TYPENAME boost::detail::widest_char<
+            typedef typename deduce_src_char_metafunc::type           src_char_t;
+            typedef typename boost::detail::deduce_target_char<Target>::type target_char_t;
+
+            typedef typename boost::detail::widest_char<
                 target_char_t, src_char_t
             >::type char_type;
 
 #if !defined(BOOST_NO_CXX11_CHAR16_T) && defined(BOOST_NO_CXX11_UNICODE_LITERALS)
-            BOOST_STATIC_ASSERT_MSG(( !boost::is_same<char16_t, src_char_t>::value
-                                        && !boost::is_same<char16_t, target_char_t>::value),
+            static_assert(!std::is_same<char16_t, src_char_t>::value
+                                        && !std::is_same<char16_t, target_char_t>::value,
                 "Your compiler does not have full support for char16_t" );
 #endif
 #if !defined(BOOST_NO_CXX11_CHAR32_T) && defined(BOOST_NO_CXX11_UNICODE_LITERALS)
-            BOOST_STATIC_ASSERT_MSG(( !boost::is_same<char32_t, src_char_t>::value
-                                        && !boost::is_same<char32_t, target_char_t>::value),
+            static_assert(!std::is_same<char32_t, src_char_t>::value
+                                        && !std::is_same<char32_t, target_char_t>::value,
                 "Your compiler does not have full support for char32_t" );
 #endif
 
-            typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c<
-                boost::detail::extract_char_traits<char_type, Target>::value,
-                BOOST_DEDUCED_TYPENAME boost::detail::extract_char_traits<char_type, Target>,
-                BOOST_DEDUCED_TYPENAME boost::detail::extract_char_traits<char_type, no_cv_src>
-            >::type::trait_t traits;
-            
-            typedef boost::mpl::bool_
-            	<
-                boost::is_same<char, src_char_t>::value &&                                 // source is not a wide character based type
-                (sizeof(char) != sizeof(target_char_t)) &&  // target type is based on wide character
-                (!(boost::detail::is_character<no_cv_src>::value))
-            	> is_string_widening_required_t;
+            typedef std::char_traits<char_type> traits;
 
-            typedef boost::mpl::bool_
-            	<
-            	!(boost::is_integral<no_cv_src>::value || 
-                  boost::detail::is_character<
-                    BOOST_DEDUCED_TYPENAME deduce_src_char_metafunc::stage1_type          // if we did not get character type at stage1
-                  >::value                                                           // then we have no optimization for that type
-            	 )
-            	> is_source_input_not_optimized_t;
-            
-            // If we have an optimized conversion for
-            // Source, we do not need to construct stringbuf.
-            BOOST_STATIC_CONSTANT(bool, requires_stringbuf = 
-            	(is_string_widening_required_t::value || is_source_input_not_optimized_t::value)
-            );
-            
             typedef boost::detail::lcast_src_length<no_cv_src> len_t;
         };
     }
- 
+
     namespace detail
     {
         template<typename Target, typename Source>
@@ -460,29 +447,33 @@ namespace boost {
         {
             typedef lexical_cast_stream_traits<Source, Target>  stream_trait;
 
-            typedef detail::lexical_istream_limited_src<
-                BOOST_DEDUCED_TYPENAME stream_trait::char_type,
-                BOOST_DEDUCED_TYPENAME stream_trait::traits,
-                stream_trait::requires_stringbuf,
+            typedef detail::lcast::optimized_src_stream<
+                typename stream_trait::char_type,
+                typename stream_trait::traits,
                 stream_trait::len_t::value + 1
-            > i_interpreter_type;
+            > optimized_src_stream;
+            
+            template <class T>
+            static auto detect_type(int)
+                -> decltype(std::declval<optimized_src_stream&>().stream_in(std::declval<lcast::exact<T>>()), optimized_src_stream{});
 
-            typedef detail::lexical_ostream_limited_src<
-                BOOST_DEDUCED_TYPENAME stream_trait::char_type,
-                BOOST_DEDUCED_TYPENAME stream_trait::traits
-            > o_interpreter_type;
+            template <class T>
+            static lcast::ios_src_stream<typename stream_trait::char_type, typename stream_trait::traits> detect_type(...);
+
+            using from_src_stream = decltype(detect_type<Source>(1));
+
+            typedef detail::lcast::to_target_stream<
+                typename stream_trait::char_type,
+                typename stream_trait::traits
+            > to_target_stream;
 
             static inline bool try_convert(const Source& arg, Target& result) {
-                i_interpreter_type i_interpreter;
-
-                // Disabling ADL, by directly specifying operators.
-                if (!(i_interpreter.operator <<(arg)))
+                from_src_stream src_stream;
+                if (!src_stream.stream_in(lcast::exact<Source>{arg}))
                     return false;
 
-                o_interpreter_type out(i_interpreter.cbegin(), i_interpreter.cend());
-
-                // Disabling ADL, by directly specifying operators.
-                if(!(out.operator >>(result)))
+                to_target_stream out(src_stream.cbegin(), src_stream.cend());
+                if (!out.stream_out(result))
                     return false;
 
                 return true;
@@ -494,5 +485,7 @@ namespace boost {
 
 #undef BOOST_LCAST_NO_WCHAR_T
 
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
 #endif // BOOST_LEXICAL_CAST_DETAIL_CONVERTER_LEXICAL_HPP
 

include/boost/lexical_cast/detail/converter_numeric.hpp

@@ -1,6 +1,6 @@
 // Copyright Kevlin Henney, 2000-2005.
 // Copyright Alexander Nasonov, 2006-2010.
-// Copyright Antony Polukhin, 2011-2014.
+// Copyright Antony Polukhin, 2011-2026.
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -13,126 +13,142 @@
 //        Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov,
 //        Alexander Nasonov, Antony Polukhin, Justin Viiret, Michael Hofmann,
 //        Cheng Yang, Matthew Bradbury, David W. Birdsall, Pavel Korzh and other Boosters
-// when:  November 2000, March 2003, June 2005, June 2006, March 2011 - 2014
+// when:  November 2000, March 2003, June 2005, June 2006, March 2011 - 2016
 
 #ifndef BOOST_LEXICAL_CAST_DETAIL_CONVERTER_NUMERIC_HPP
 #define BOOST_LEXICAL_CAST_DETAIL_CONVERTER_NUMERIC_HPP
 
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 #include <boost/config.hpp>
 #ifdef BOOST_HAS_PRAGMA_ONCE
 #   pragma once
 #endif
 
+#include <type_traits>
+#include <boost/core/cmath.hpp>
 #include <boost/limits.hpp>
-#include <boost/mpl/eval_if.hpp>
-#include <boost/mpl/identity.hpp>
-#include <boost/mpl/if.hpp>
-#include <boost/type_traits/make_unsigned.hpp>
-#include <boost/type_traits/is_signed.hpp>
-#include <boost/type_traits/is_integral.hpp>
-#include <boost/type_traits/is_arithmetic.hpp>
-#include <boost/type_traits/is_base_of.hpp>
-#include <boost/type_traits/is_float.hpp>
 
-#include <boost/numeric/conversion/cast.hpp>
+#endif  // #ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
+
+#include <boost/lexical_cast/detail/type_traits.hpp>
 
 namespace boost { namespace detail {
 
-template <class Source >
-struct detect_precision_loss
-{
-    typedef Source source_type;
-    typedef boost::numeric::Trunc<Source> Rounder;
-    typedef BOOST_DEDUCED_TYPENAME mpl::if_<
-        boost::is_arithmetic<Source>, Source, Source const&
-    >::type argument_type ;
-
-    static inline source_type nearbyint(argument_type s, bool& is_ok) BOOST_NOEXCEPT {
-        const source_type near_int = Rounder::nearbyint(s);
-        if (near_int && is_ok) {
-            const source_type orig_div_round = s / near_int;
-            const source_type eps = std::numeric_limits<source_type>::epsilon();
-
-            is_ok = !((orig_div_round > 1 ? orig_div_round - 1 : 1 - orig_div_round) > eps);
-        }
-
-        return s;
-    }
-
-    typedef typename Rounder::round_style round_style;
-};
-
-template <typename Base, class Source>
-struct fake_precision_loss: public Base
-{
-    typedef Source source_type ;
-    typedef BOOST_DEDUCED_TYPENAME mpl::if_<
-        boost::is_arithmetic<Source>, Source, Source const&
-    >::type argument_type ;
-
-    static inline source_type nearbyint(argument_type s, bool& /*is_ok*/) BOOST_NOEXCEPT {
-        return s;
-    }
-};
-
-struct nothrow_overflow_handler
-{
-    inline bool operator() ( boost::numeric::range_check_result r ) const BOOST_NOEXCEPT {
-        return (r == boost::numeric::cInRange);
-    }
-};
-
-template <typename Target, typename Source>
-inline bool noexcept_numeric_convert(const Source& arg, Target& result) BOOST_NOEXCEPT {
-    typedef boost::numeric::converter<
-            Target,
-            Source,
-            boost::numeric::conversion_traits<Target, Source >,
-            nothrow_overflow_handler,
-            detect_precision_loss<Source >
-    > converter_orig_t;
-
-    typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c<
-        boost::is_base_of< detect_precision_loss<Source >, converter_orig_t >::value,
-        converter_orig_t,
-        fake_precision_loss<converter_orig_t, Source>
-    >::type converter_t;
-
-    bool res = nothrow_overflow_handler()(converter_t::out_of_range(arg));
-    result = converter_t::low_level_convert(converter_t::nearbyint(arg, res));
-    return res;
+template <class Source, class Target>
+bool ios_numeric_comparer_float(Source x, Source y) noexcept {
+    return x == y
+        || (boost::core::isnan(x) && boost::core::isnan(y))
+        || (x < (std::numeric_limits<Target>::min)())
+    ;
 }
 
+template <class RangeType, class T>
+constexpr bool is_out_of_range_for(T value) noexcept {
+    return value > static_cast<T>((std::numeric_limits<RangeType>::max)())
+        || value < static_cast<T>((std::numeric_limits<RangeType>::min)())
+        || boost::core::isnan(value);
+}
+
+
+// integral -> integral
 template <typename Target, typename Source>
+typename std::enable_if<
+    !std::is_floating_point<Source>::value && !std::is_floating_point<Target>::value, bool
+>::type noexcept_numeric_convert(Source arg, Target& result) noexcept {
+    const Target target_tmp = static_cast<Target>(arg);
+    const Source arg_restored = static_cast<Source>(target_tmp);
+    if (arg == arg_restored) {
+        result = target_tmp;
+        return true;
+    }
+    return false;
+}
+
+// integral -> floating point
+template <typename Target, typename Source>
+typename std::enable_if<
+    !std::is_floating_point<Source>::value && std::is_floating_point<Target>::value, bool
+>::type noexcept_numeric_convert(Source arg, Target& result) noexcept {
+    const Target target_tmp = static_cast<Target>(arg);
+    result = target_tmp;
+    return true;
+}
+
+
+// floating point -> floating point
+template <typename Target, typename Source>
+typename std::enable_if<
+    std::is_floating_point<Source>::value && std::is_floating_point<Target>::value, bool
+>::type noexcept_numeric_convert(Source arg, Target& result) noexcept {
+    const Target target_tmp = static_cast<Target>(arg);
+    const Source arg_restored = static_cast<Source>(target_tmp);
+    if (detail::ios_numeric_comparer_float<Source, Target>(arg, arg_restored)) {
+        result = target_tmp;
+        return true;
+    }
+
+    return false;
+}
+
+// floating point -> integral
+template <typename Target, typename Source>
+typename std::enable_if<
+    std::is_floating_point<Source>::value && !std::is_floating_point<Target>::value, bool
+>::type noexcept_numeric_convert(Source arg, Target& result) noexcept {
+    if (detail::is_out_of_range_for<Target>(arg)) {
+        return false;
+    }
+
+    const Target target_tmp = static_cast<Target>(arg);
+    const Source arg_restored = static_cast<Source>(target_tmp);
+    if (arg == arg_restored /* special values are handled in detail::is_out_of_range_for */) {
+        result = target_tmp;
+        return true;
+    }
+
+    return false;
+}
+
 struct lexical_cast_dynamic_num_not_ignoring_minus
 {
-    static inline bool try_convert(const Source &arg, Target& result) BOOST_NOEXCEPT {
-        return noexcept_numeric_convert<Target, Source >(arg, result);
+    template <typename Target, typename Source>
+    static inline bool try_convert(Source arg, Target& result) noexcept {
+        return boost::detail::noexcept_numeric_convert<Target, Source >(arg, result);
     }
 };
 
-template <typename Target, typename Source>
 struct lexical_cast_dynamic_num_ignoring_minus
 {
-    static inline bool try_convert(const Source &arg, Target& result) BOOST_NOEXCEPT {
-        typedef BOOST_DEDUCED_TYPENAME boost::mpl::eval_if_c<
-                boost::is_float<Source>::value,
-                boost::mpl::identity<Source>,
-                boost::make_unsigned<Source>
-        >::type usource_t;
+    template <typename Target, typename Source>
+#if defined(__clang__) && (__clang_major__ > 3 || __clang_minor__ > 6)
+    __attribute__((no_sanitize("unsigned-integer-overflow")))
+#endif
+    static inline bool try_convert(Source arg, Target& result) noexcept {
+        typedef typename std::conditional<
+                std::is_floating_point<Source>::value,
+                std::conditional<true, Source, Source>,  // std::type_identity emulation
+                boost::detail::lcast::make_unsigned<Source>
+        >::type usource_lazy_t;
+        typedef typename usource_lazy_t::type usource_t;
 
         if (arg < 0) {
-            const bool res = noexcept_numeric_convert<Target, usource_t>(0u - arg, result);
+            const bool res = boost::detail::noexcept_numeric_convert<Target, usource_t>(
+                static_cast<usource_t>(0u - static_cast<usource_t>(arg)), result
+            );
             result = static_cast<Target>(0u - result);
             return res;
         } else {
-            return noexcept_numeric_convert<Target, usource_t>(arg, result);
+            return boost::detail::noexcept_numeric_convert<Target, usource_t>(arg, result);
         }
     }
 };
 
 /*
- * lexical_cast_dynamic_num follows the rules:
+ * dynamic_num_converter_impl follows the rules:
  * 1) If Source can be converted to Target without precision loss and
  * without overflows, then assign Source to Target and return
  *
@@ -152,37 +168,15 @@ struct lexical_cast_dynamic_num_ignoring_minus
 template <typename Target, typename Source>
 struct dynamic_num_converter_impl
 {
-    static inline bool try_convert(const Source &arg, Target& result) BOOST_NOEXCEPT {
-        typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c<
-        	boost::is_unsigned<Target>::value &&
-        	(boost::is_signed<Source>::value || boost::is_float<Source>::value) &&
-        	!(boost::is_same<Source, bool>::value) &&
-        	!(boost::is_same<Target, bool>::value),
-            lexical_cast_dynamic_num_ignoring_minus<Target, Source>,
-            lexical_cast_dynamic_num_not_ignoring_minus<Target, Source>
+    static inline bool try_convert(Source arg, Target& result) noexcept {
+        typedef typename std::conditional<
+            boost::detail::lcast::is_unsigned<Target>::value &&
+            (boost::detail::lcast::is_signed<Source>::value || std::is_floating_point<Source>::value) &&
+            !(std::is_same<Source, bool>::value) &&
+            !(std::is_same<Target, bool>::value),
+            lexical_cast_dynamic_num_ignoring_minus,
+            lexical_cast_dynamic_num_not_ignoring_minus
         >::type caster_type;
-        
-#if 0
-
-        typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_<
-            BOOST_DEDUCED_TYPENAME boost::mpl::and_<
-                boost::is_unsigned<Target>,
-                boost::mpl::or_<
-                    boost::is_signed<Source>,
-                    boost::is_float<Source>
-                >,
-                boost::mpl::not_<
-                    boost::is_same<Source, bool>
-                >,
-                boost::mpl::not_<
-                    boost::is_same<Target, bool>
-                >
-            >::type,
-            lexical_cast_dynamic_num_ignoring_minus<Target, Source>,
-            lexical_cast_dynamic_num_not_ignoring_minus<Target, Source>
-        >::type caster_type;
-        
-#endif
 
         return caster_type::try_convert(arg, result);
     }
@@ -190,5 +184,7 @@ struct dynamic_num_converter_impl
 
 }} // namespace boost::detail
 
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
 #endif // BOOST_LEXICAL_CAST_DETAIL_CONVERTER_NUMERIC_HPP
 

include/boost/lexical_cast/detail/inf_nan.hpp

@@ -1,6 +1,6 @@
 // Copyright Kevlin Henney, 2000-2005.
 // Copyright Alexander Nasonov, 2006-2010.
-// Copyright Antony Polukhin, 2011-2014.
+// Copyright Antony Polukhin, 2011-2026.
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -18,6 +18,11 @@
 #ifndef BOOST_LEXICAL_CAST_DETAIL_INF_NAN_HPP
 #define BOOST_LEXICAL_CAST_DETAIL_INF_NAN_HPP
 
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 #include <boost/config.hpp>
 #ifdef BOOST_HAS_PRAGMA_ONCE
 #   pragma once
@@ -27,12 +32,12 @@
 #define BOOST_LCAST_NO_WCHAR_T
 #endif
 
+#include <boost/limits.hpp>
+#include <boost/config/workaround.hpp>
+#include <boost/core/cmath.hpp>
 #include <cstddef>
 #include <cstring>
-#include <boost/limits.hpp>
-#include <boost/detail/workaround.hpp>
-#include <boost/math/special_functions/sign.hpp>
-#include <boost/math/special_functions/fpclassify.hpp>
+#endif  // #ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 
 #include <boost/lexical_cast/detail/lcast_char_constants.hpp>
 
@@ -40,7 +45,7 @@ namespace boost {
     namespace detail
     {
         template <class CharT>
-        bool lc_iequal(const CharT* val, const CharT* lcase, const CharT* ucase, unsigned int len) BOOST_NOEXCEPT {
+        bool lc_iequal(const CharT* val, const CharT* lcase, const CharT* ucase, unsigned int len) noexcept {
             for( unsigned int i=0; i < len; ++i ) {
                 if ( val[i] != lcase[i] && val[i] != ucase[i] ) return false;
             }
@@ -53,9 +58,8 @@ namespace boost {
         inline bool parse_inf_nan_impl(const CharT* begin, const CharT* end, T& value
             , const CharT* lc_NAN, const CharT* lc_nan
             , const CharT* lc_INFINITY, const CharT* lc_infinity
-            , const CharT opening_brace, const CharT closing_brace) BOOST_NOEXCEPT
+            , const CharT opening_brace, const CharT closing_brace) noexcept
         {
-            using namespace std;
             if (begin == end) return false;
             const CharT minus = lcast_char_constants<CharT>::minus;
             const CharT plus = lcast_char_constants<CharT>::plus;
@@ -72,14 +76,14 @@ namespace boost {
                 begin += 3;
                 if (end != begin) {
                     /* It is 'nan(...)' or some bad input*/
-                    
+
                     if (end - begin < 2) return false; // bad input
                     -- end;
                     if (*begin != opening_brace || *end != closing_brace) return false; // bad input
                 }
 
                 if( !has_minus ) value = std::numeric_limits<T>::quiet_NaN();
-                else value = (boost::math::changesign) (std::numeric_limits<T>::quiet_NaN());
+                else value = boost::core::copysign(std::numeric_limits<T>::quiet_NaN(), static_cast<T>(-1));
                 return true;
             } else if (
                 ( /* 'INF' or 'inf' */
@@ -94,7 +98,7 @@ namespace boost {
              )
             {
                 if( !has_minus ) value = std::numeric_limits<T>::infinity();
-                else value = (boost::math::changesign) (std::numeric_limits<T>::infinity());
+                else value = -std::numeric_limits<T>::infinity();
                 return true;
             }
 
@@ -102,39 +106,31 @@ namespace boost {
         }
 
         template <class CharT, class T>
-        bool put_inf_nan_impl(CharT* begin, CharT*& end, const T& value
+        const CharT* get_inf_nan_impl(T value
                          , const CharT* lc_nan
-                         , const CharT* lc_infinity) BOOST_NOEXCEPT
+                         , const CharT* lc_minus_nan
+                         , const CharT* lc_infinity
+                         , const CharT* lc_minus_infinity) noexcept
         {
-            using namespace std;
-            const CharT minus = lcast_char_constants<CharT>::minus;
-            if ((boost::math::isnan)(value)) {
-                if ((boost::math::signbit)(value)) {
-                    *begin = minus;
-                    ++ begin;
+            if (boost::core::isnan(value)) {
+                if (boost::core::signbit(value)) {
+                    return lc_minus_nan;
                 }
-
-                memcpy(begin, lc_nan, 3 * sizeof(CharT));
-                end = begin + 3;
-                return true;
-            } else if ((boost::math::isinf)(value)) {
-                if ((boost::math::signbit)(value)) {
-                    *begin = minus;
-                    ++ begin;
+                return lc_nan;
+            } else if (boost::core::isinf(value)) {
+                if (boost::core::signbit(value)) {
+                    return lc_minus_infinity;
                 }
-
-                memcpy(begin, lc_infinity, 3 * sizeof(CharT));
-                end = begin + 3;
-                return true;
+                return lc_infinity;
             }
 
-            return false;
+            return nullptr;
         }
 
 
 #ifndef BOOST_LCAST_NO_WCHAR_T
         template <class T>
-        bool parse_inf_nan(const wchar_t* begin, const wchar_t* end, T& value) BOOST_NOEXCEPT {
+        bool parse_inf_nan(const wchar_t* begin, const wchar_t* end, T& value) noexcept {
             return parse_inf_nan_impl(begin, end, value
                                , L"NAN", L"nan"
                                , L"INFINITY", L"infinity"
@@ -142,14 +138,14 @@ namespace boost {
         }
 
         template <class T>
-        bool put_inf_nan(wchar_t* begin, wchar_t*& end, const T& value) BOOST_NOEXCEPT {
-            return put_inf_nan_impl(begin, end, value, L"nan", L"infinity");
+        const wchar_t* get_inf_nan(T value, wchar_t) noexcept {
+            return detail::get_inf_nan_impl(value, L"nan", L"-nan", L"inf", L"-inf");
         }
 
 #endif
 #if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
         template <class T>
-        bool parse_inf_nan(const char16_t* begin, const char16_t* end, T& value) BOOST_NOEXCEPT {
+        bool parse_inf_nan(const char16_t* begin, const char16_t* end, T& value) noexcept {
             return parse_inf_nan_impl(begin, end, value
                                , u"NAN", u"nan"
                                , u"INFINITY", u"infinity"
@@ -157,13 +153,13 @@ namespace boost {
         }
 
         template <class T>
-        bool put_inf_nan(char16_t* begin, char16_t*& end, const T& value) BOOST_NOEXCEPT {
-            return put_inf_nan_impl(begin, end, value, u"nan", u"infinity");
+        const char16_t* get_inf_nan(T value, char16_t) noexcept {
+            return detail::get_inf_nan_impl(value, u"nan", u"-nan", u"inf", u"-inf");
         }
 #endif
 #if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
         template <class T>
-        bool parse_inf_nan(const char32_t* begin, const char32_t* end, T& value) BOOST_NOEXCEPT {
+        bool parse_inf_nan(const char32_t* begin, const char32_t* end, T& value) noexcept {
             return parse_inf_nan_impl(begin, end, value
                                , U"NAN", U"nan"
                                , U"INFINITY", U"infinity"
@@ -171,27 +167,29 @@ namespace boost {
         }
 
         template <class T>
-        bool put_inf_nan(char32_t* begin, char32_t*& end, const T& value) BOOST_NOEXCEPT {
-            return put_inf_nan_impl(begin, end, value, U"nan", U"infinity");
+        const char32_t* get_inf_nan(T value, char32_t) noexcept {
+            return detail::get_inf_nan_impl(value, U"nan", U"-nan", U"inf", U"-inf");
         }
 #endif
 
         template <class CharT, class T>
-        bool parse_inf_nan(const CharT* begin, const CharT* end, T& value) BOOST_NOEXCEPT {
+        bool parse_inf_nan(const CharT* begin, const CharT* end, T& value) noexcept {
             return parse_inf_nan_impl(begin, end, value
                                , "NAN", "nan"
                                , "INFINITY", "infinity"
                                , '(', ')');
         }
 
-        template <class CharT, class T>
-        bool put_inf_nan(CharT* begin, CharT*& end, const T& value) BOOST_NOEXCEPT {
-            return put_inf_nan_impl(begin, end, value, "nan", "infinity");
+        template <class T>
+        const char* get_inf_nan(T value, char) noexcept {
+            return detail::get_inf_nan_impl(value, "nan", "-nan", "inf", "-inf");
         }
     }
 } // namespace boost
 
 #undef BOOST_LCAST_NO_WCHAR_T
 
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
 #endif // BOOST_LEXICAL_CAST_DETAIL_INF_NAN_HPP
 

include/boost/lexical_cast/detail/is_character.hpp

@@ -1,6 +1,6 @@
 // Copyright Kevlin Henney, 2000-2005.
 // Copyright Alexander Nasonov, 2006-2010.
-// Copyright Antony Polukhin, 2011-2014.
+// Copyright Antony Polukhin, 2011-2026.
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -18,41 +18,43 @@
 #ifndef BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP
 #define BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP
 
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 #include <boost/config.hpp>
 #ifdef BOOST_HAS_PRAGMA_ONCE
 #   pragma once
 #endif
 
-#include <boost/mpl/bool.hpp>
-#include <boost/type_traits/is_same.hpp>
+#include <type_traits>
 
-namespace boost {
+#endif  // #ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 
-    namespace detail // is_character<...>
-    {
-        // returns true, if T is one of the character types
-        template < typename T >
-        struct is_character
-        {
-            typedef BOOST_DEDUCED_TYPENAME boost::mpl::bool_<
-                    boost::is_same< T, char >::value ||
-                    #if !defined(BOOST_NO_STRINGSTREAM) && !defined(BOOST_NO_STD_WSTRING)
-                        boost::is_same< T, wchar_t >::value ||
-                    #endif
-                    #ifndef BOOST_NO_CXX11_CHAR16_T
-                        boost::is_same< T, char16_t >::value ||
-                    #endif
-                    #ifndef BOOST_NO_CXX11_CHAR32_T
-                        boost::is_same< T, char32_t >::value ||
-                    #endif
-                   	boost::is_same< T, unsigned char >::value ||
-                   	boost::is_same< T, signed char >::value
-            > type;
+namespace boost { namespace detail {
 
-            BOOST_STATIC_CONSTANT(bool, value = (type::value) );
-        };
-    }
-}
+// returns true, if T is one of the character types
+template < typename T >
+using is_character = std::integral_constant<
+    bool,
+    std::is_same< T, char >::value ||
+#if !defined(BOOST_NO_STRINGSTREAM) && !defined(BOOST_NO_STD_WSTRING)
+    std::is_same< T, wchar_t >::value ||
+#endif
+#ifndef BOOST_NO_CXX11_CHAR16_T
+    std::is_same< T, char16_t >::value ||
+#endif
+#ifndef BOOST_NO_CXX11_CHAR32_T
+    std::is_same< T, char32_t >::value ||
+#endif
+    std::is_same< T, unsigned char >::value ||
+    std::is_same< T, signed char >::value
+>;
+
+}}
+
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
 
 #endif // BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP
 

include/boost/lexical_cast/detail/lcast_basic_unlockedbuf.hpp

@@ -0,0 +1,82 @@
+// Copyright Kevlin Henney, 2000-2005.
+// Copyright Alexander Nasonov, 2006-2010.
+// Copyright Antony Polukhin, 2011-2026.
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_LEXICAL_CAST_DETAIL_CONVERTER_LEXICAL_BASIC_UNLOCKEDBUF_HPP
+#define BOOST_LEXICAL_CAST_DETAIL_CONVERTER_LEXICAL_BASIC_UNLOCKEDBUF_HPP
+
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
+
+#include <boost/config.hpp>
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#   pragma once
+#endif
+
+
+#ifdef BOOST_NO_STRINGSTREAM
+#include <strstream>
+#else
+#include <sstream>
+#endif
+
+#include <boost/detail/basic_pointerbuf.hpp>
+#ifndef BOOST_NO_CWCHAR
+#   include <cwchar>
+#endif
+#endif  // #ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
+
+namespace boost { namespace detail { namespace lcast {
+
+    // acts as a stream buffer which wraps around a pair of pointers
+    // and gives acces to internals
+    template <class BufferType, class CharT>
+    class basic_unlockedbuf : public basic_pointerbuf<CharT, BufferType> {
+    public:
+        typedef basic_pointerbuf<CharT, BufferType> base_type;
+        typedef typename base_type::streamsize streamsize;
+
+        using base_type::pptr;
+        using base_type::pbase;
+        using base_type::setbuf;
+    };
+
+#if defined(BOOST_NO_STRINGSTREAM)
+    template <class CharT, class Traits>
+    using out_stream_t = std::ostream;
+
+    template <class CharT, class Traits>
+    using stringbuffer_t = basic_unlockedbuf<std::strstreambuf, char>;
+#elif defined(BOOST_NO_STD_LOCALE)
+    template <class CharT, class Traits>
+    using out_stream_t = std::ostream;
+
+    template <class CharT, class Traits>
+    using stringbuffer_t = basic_unlockedbuf<std::stringbuf, char>;
+
+    template <class CharT, class Traits>
+    using buffer_t = basic_unlockedbuf<std::streambuf, char>;
+#else
+    template <class CharT, class Traits>
+    using out_stream_t = std::basic_ostream<CharT, Traits>;
+
+    template <class CharT, class Traits>
+    using stringbuffer_t = basic_unlockedbuf<std::basic_stringbuf<CharT, Traits>, CharT>;
+
+    template <class CharT, class Traits>
+    using buffer_t = basic_unlockedbuf<std::basic_streambuf<CharT, Traits>, CharT>;
+#endif
+
+}}} // namespace boost::detail::lcast
+
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#endif // BOOST_LEXICAL_CAST_DETAIL_CONVERTER_LEXICAL_BASIC_UNLOCKEDBUF_HPP
+

include/boost/lexical_cast/detail/lcast_char_constants.hpp

@@ -1,6 +1,6 @@
 // Copyright Kevlin Henney, 2000-2005.
 // Copyright Alexander Nasonov, 2006-2010.
-// Copyright Antony Polukhin, 2011-2014.
+// Copyright Antony Polukhin, 2011-2026.
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -18,12 +18,18 @@
 #ifndef BOOST_LEXICAL_CAST_DETAIL_LCAST_CHAR_CONSTANTS_HPP
 #define BOOST_LEXICAL_CAST_DETAIL_LCAST_CHAR_CONSTANTS_HPP
 
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 #include <boost/config.hpp>
 #ifdef BOOST_HAS_PRAGMA_ONCE
 #   pragma once
 #endif
+#endif  // #ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 
-namespace boost 
+namespace boost
 {
     namespace detail // '0', '-', '+', 'e', 'E' and '.' constants
     {
@@ -41,6 +47,7 @@ namespace boost
     }
 } // namespace boost
 
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
 
 #endif // BOOST_LEXICAL_CAST_DETAIL_LCAST_CHAR_CONSTANTS_HPP
 

include/boost/lexical_cast/detail/lcast_precision.hpp

@@ -0,0 +1,95 @@
+// Copyright Alexander Nasonov & Paul A. Bristow 2006.
+
+// Use, modification and distribution are subject to the
+// Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt
+// or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_DETAIL_LCAST_PRECISION_HPP_INCLUDED
+#define BOOST_DETAIL_LCAST_PRECISION_HPP_INCLUDED
+
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
+#include <boost/config.hpp>
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#   pragma once
+#endif
+
+#include <climits>
+#include <ios>
+#include <limits>
+
+#endif  // #ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
+
+namespace boost { namespace detail {
+
+// Calculate an argument to pass to std::ios_base::precision from
+// lexical_cast.
+template<class T>
+struct lcast_precision
+{
+    using limits = std::numeric_limits<T>;
+
+    static constexpr bool use_default_precision =
+            !limits::is_specialized || limits::is_exact
+        ;
+
+    static constexpr bool is_specialized_bin =
+            !use_default_precision &&
+            limits::radix == 2 && limits::digits > 0
+        ;
+
+    static constexpr bool is_specialized_dec =
+            !use_default_precision &&
+            limits::radix == 10 && limits::digits10 > 0
+        ;
+
+    static constexpr std::streamsize streamsize_max =
+            (std::numeric_limits<std::streamsize>::max)()
+        ;
+
+    static constexpr unsigned int precision_dec = limits::digits10 + 1U;
+
+    static_assert(!is_specialized_dec ||
+            precision_dec <= streamsize_max + 0UL
+        , "");
+
+    static constexpr unsigned long precision_bin =
+            2UL + limits::digits * 30103UL / 100000UL
+        ;
+
+    static_assert(!is_specialized_bin ||
+            (limits::digits + 0UL < ULONG_MAX / 30103UL &&
+            precision_bin > limits::digits10 + 0UL &&
+            precision_bin <= streamsize_max + 0UL)
+        , "");
+
+    static constexpr std::streamsize value =
+            is_specialized_bin ? precision_bin
+                               : is_specialized_dec ? precision_dec : 6
+        ;
+};
+
+template<class T>
+inline void lcast_set_precision(std::ios_base& stream, T*)
+{
+    stream.precision(lcast_precision<T>::value);
+}
+
+template<class Source, class Target>
+inline void lcast_set_precision(std::ios_base& stream, Source*, Target*)
+{
+    std::streamsize const s = lcast_precision<Source>::value;
+    std::streamsize const t = lcast_precision<Target*>::value;
+    stream.precision(s > t ? s : t);
+}
+
+}}
+
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#endif //  BOOST_DETAIL_LCAST_PRECISION_HPP_INCLUDED
+

include/boost/lexical_cast/detail/lcast_unsigned_converters.hpp

@@ -1,6 +1,6 @@
 // Copyright Kevlin Henney, 2000-2005.
 // Copyright Alexander Nasonov, 2006-2010.
-// Copyright Antony Polukhin, 2011-2014.
+// Copyright Antony Polukhin, 2011-2026.
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -18,6 +18,11 @@
 #ifndef BOOST_LEXICAL_CAST_DETAIL_LCAST_UNSIGNED_CONVERTERS_HPP
 #define BOOST_LEXICAL_CAST_DETAIL_LCAST_UNSIGNED_CONVERTERS_HPP
 
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 #include <boost/config.hpp>
 #ifdef BOOST_HAS_PRAGMA_ONCE
 #   pragma once
@@ -28,10 +33,10 @@
 #include <string>
 #include <cstring>
 #include <cstdio>
+#include <type_traits>
 #include <boost/limits.hpp>
-#include <boost/mpl/if.hpp>
-#include <boost/static_assert.hpp>
-#include <boost/detail/workaround.hpp>
+#include <boost/config/workaround.hpp>
+#include <boost/lexical_cast/detail/type_traits.hpp>
 
 
 #ifndef BOOST_NO_STD_LOCALE
@@ -48,20 +53,24 @@
 #endif
 
 #include <boost/lexical_cast/detail/lcast_char_constants.hpp>
-#include <boost/type_traits/make_unsigned.hpp>
-#include <boost/type_traits/is_signed.hpp>
-#include <boost/noncopyable.hpp>
+#include <boost/core/noncopyable.hpp>
+#endif  // #ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 
-namespace boost 
+#include <boost/lexical_cast/detail/lcast_char_constants.hpp>
+
+namespace boost
 {
     namespace detail // lcast_to_unsigned
     {
         template<class T>
+#if defined(__clang__) && (__clang_major__ > 3 || __clang_minor__ > 6)
+       __attribute__((no_sanitize("unsigned-integer-overflow")))
+#endif
         inline
-        BOOST_DEDUCED_TYPENAME boost::make_unsigned<T>::type lcast_to_unsigned(const T value) BOOST_NOEXCEPT {
-            typedef BOOST_DEDUCED_TYPENAME boost::make_unsigned<T>::type result_type;
-            return value < 0 
-                ? static_cast<result_type>(0u - static_cast<result_type>(value)) 
+        typename boost::detail::lcast::make_unsigned<T>::type lcast_to_unsigned(const T value) noexcept {
+            typedef typename boost::detail::lcast::make_unsigned<T>::type result_type;
+            return value < 0
+                ? static_cast<result_type>(0u - static_cast<result_type>(value))
                 : static_cast<result_type>(value);
         }
     }
@@ -70,10 +79,10 @@ namespace boost
     {
         template <class Traits, class T, class CharT>
         class lcast_put_unsigned: boost::noncopyable {
-            typedef BOOST_DEDUCED_TYPENAME Traits::int_type int_type;
-            BOOST_DEDUCED_TYPENAME boost::mpl::if_c<
-                    (sizeof(int_type) > sizeof(T))
-                    , int_type
+            typedef typename Traits::int_type int_type;
+            typename std::conditional<
+                    (sizeof(unsigned) > sizeof(T))
+                    , unsigned
                     , T
             >::type         m_value;
             CharT*          m_finish;
@@ -81,12 +90,12 @@ namespace boost
             int_type const  m_zero;
 
         public:
-            lcast_put_unsigned(const T n_param, CharT* finish) BOOST_NOEXCEPT 
+            lcast_put_unsigned(const T n_param, CharT* finish) noexcept
                 : m_value(n_param), m_finish(finish)
                 , m_czero(lcast_char_constants<CharT>::zero), m_zero(Traits::to_int_type(m_czero))
             {
 #ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
-                BOOST_STATIC_ASSERT(!std::numeric_limits<T>::is_signed);
+                static_assert(!std::numeric_limits<T>::is_signed, "");
 #endif
             }
 
@@ -108,7 +117,7 @@ namespace boost
 
 #ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
                 // Check that ulimited group is unreachable:
-                BOOST_STATIC_ASSERT(std::numeric_limits<T>::digits10 < CHAR_MAX);
+                static_assert(std::numeric_limits<T>::digits10 < CHAR_MAX, "");
 #endif
                 CharT const thousands_sep = np.thousands_sep();
                 std::string::size_type group = 0; // current group number
@@ -138,7 +147,7 @@ namespace boost
             }
 
         private:
-            inline bool main_convert_iteration() BOOST_NOEXCEPT {
+            inline bool main_convert_iteration() noexcept {
                 --m_finish;
                 int_type const digit = static_cast<int_type>(m_value % 10U);
                 Traits::assign(*m_finish, Traits::to_char_type(m_zero + digit));
@@ -146,7 +155,7 @@ namespace boost
                 return !!m_value; // suppressing warnings
             }
 
-            inline CharT* main_convert_loop() BOOST_NOEXCEPT {
+            inline CharT* main_convert_loop() noexcept {
                 while (main_convert_iteration());
                 return m_finish;
             }
@@ -162,20 +171,20 @@ namespace boost
             T& m_value;
             const CharT* const m_begin;
             const CharT* m_end;
-    
+
         public:
-            lcast_ret_unsigned(T& value, const CharT* const begin, const CharT* end) BOOST_NOEXCEPT
+            lcast_ret_unsigned(T& value, const CharT* const begin, const CharT* end) noexcept
                 : m_multiplier_overflowed(false), m_multiplier(1), m_value(value), m_begin(begin), m_end(end)
             {
 #ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
-                BOOST_STATIC_ASSERT(!std::numeric_limits<T>::is_signed);
+                static_assert(!std::numeric_limits<T>::is_signed, "");
 
                 // GCC when used with flag -std=c++0x may not have std::numeric_limits
                 // specializations for __int128 and unsigned __int128 types.
                 // Try compilation with -std=gnu++0x or -std=gnu++11.
                 //
                 // http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40856
-                BOOST_STATIC_ASSERT_MSG(std::numeric_limits<T>::is_specialized,
+                static_assert(std::numeric_limits<T>::is_specialized,
                     "std::numeric_limits are not specialized for integral type passed to boost::lexical_cast"
                 );
 #endif
@@ -250,9 +259,12 @@ namespace boost
             }
 
         private:
-            // Iteration that does not care about grouping/separators and assumes that all 
+            // Iteration that does not care about grouping/separators and assumes that all
             // input characters are digits
-            inline bool main_convert_iteration() BOOST_NOEXCEPT {
+#if defined(__clang__) && (__clang_major__ > 3 || __clang_minor__ > 6)
+            __attribute__((no_sanitize("unsigned-integer-overflow")))
+#endif
+            inline bool main_convert_iteration() noexcept {
                 CharT const czero = lcast_char_constants<CharT>::zero;
                 T const maxv = (std::numeric_limits<T>::max)();
 
@@ -265,7 +277,7 @@ namespace boost
                 // We must correctly handle situations like `000000000000000000000000000001`.
                 // So we take care of overflow only if `dig_value` is not '0'.
                 if (*m_end < czero || *m_end >= czero + 10  // checking for correct digit
-                    || (dig_value && (                      // checking for overflow of ... 
+                    || (dig_value && (                      // checking for overflow of ...
                         m_multiplier_overflowed                             // ... multiplier
                         || static_cast<T>(maxv / dig_value) < m_multiplier  // ... subvalue
                         || static_cast<T>(maxv - new_sub_value) < m_value   // ... whole expression
@@ -273,22 +285,24 @@ namespace boost
                 ) return false;
 
                 m_value = static_cast<T>(m_value + new_sub_value);
-                
+
                 return true;
             }
 
-            bool main_convert_loop() BOOST_NOEXCEPT {
+            bool main_convert_loop() noexcept {
                 for ( ; m_end >= m_begin; --m_end) {
                     if (!main_convert_iteration()) {
                         return false;
                     }
                 }
-            
+
                 return true;
             }
         };
     }
 } // namespace boost
 
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
 #endif // BOOST_LEXICAL_CAST_DETAIL_LCAST_UNSIGNED_CONVERTERS_HPP
 

include/boost/lexical_cast/detail/type_traits.hpp

@@ -0,0 +1,81 @@
+// Copyright Peter Dimov, 2025.
+// Copyright Romain Geissler, 2025.
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_LEXICAL_CAST_DETAIL_TYPE_TRAITS_HPP
+#define BOOST_LEXICAL_CAST_DETAIL_TYPE_TRAITS_HPP
+
+#include <boost/config.hpp>
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#   pragma once
+#endif
+
+#include <type_traits>
+
+namespace boost { namespace detail { namespace lcast {
+
+// libstdc++ from gcc <= 15 doesn't provide support for __int128 in the standard traits,
+// so define them explicitly.
+// This was fixed with gcc >= 16, so we may eventually remove this workaround and use
+// directly the standard type_traits.
+
+template<class T> struct is_integral: public std::is_integral<T>
+{
+};
+
+template<class T> struct is_signed: public std::is_signed<T>
+{
+};
+
+template<class T> struct is_unsigned: public std::is_unsigned<T>
+{
+};
+
+template<class T> struct make_unsigned: public std::make_unsigned<T>
+{
+};
+
+#if defined(__SIZEOF_INT128__)
+
+template<> struct is_integral<__int128_t>: public std::true_type
+{
+};
+
+template<> struct is_integral<__uint128_t>: public std::true_type
+{
+};
+
+template<> struct is_signed<__int128_t>: public std::true_type
+{
+};
+
+template<> struct is_signed<__uint128_t>: public std::false_type
+{
+};
+
+template<> struct is_unsigned<__int128_t>: public std::false_type
+{
+};
+
+template<> struct is_unsigned<__uint128_t>: public std::true_type
+{
+};
+
+template<> struct make_unsigned<__int128_t>
+{
+    typedef __uint128_t type;
+};
+
+template<> struct make_unsigned<__uint128_t>
+{
+    typedef __uint128_t type;
+};
+
+#endif
+
+}}}  // namespace boost::detail::lcast
+
+#endif // BOOST_LEXICAL_CAST_DETAIL_TYPE_TRAITS_HPP

include/boost/lexical_cast/detail/widest_char.hpp

@@ -1,6 +1,6 @@
 // Copyright Kevlin Henney, 2000-2005.
 // Copyright Alexander Nasonov, 2006-2010.
-// Copyright Antony Polukhin, 2011-2014.
+// Copyright Antony Polukhin, 2011-2026.
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -18,23 +18,32 @@
 #ifndef BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP
 #define BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP
 
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 #include <boost/config.hpp>
 #ifdef BOOST_HAS_PRAGMA_ONCE
 #   pragma once
 #endif
 
+#include <type_traits>
+
+#endif  // #ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
+
 namespace boost { namespace detail {
 
-    template <typename TargetChar, typename SourceChar>
-    struct widest_char {
-        typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c<
-            (sizeof(TargetChar) > sizeof(SourceChar))
-            , TargetChar
-            , SourceChar
-        >::type type;
-    };
+template <typename TargetChar, typename SourceChar>
+using widest_char = std::conditional<
+    (sizeof(TargetChar) > sizeof(SourceChar))
+    , TargetChar
+    , SourceChar
+>;
 
 }} // namespace boost::detail
 
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
 #endif // BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP
 

include/boost/lexical_cast/try_lexical_convert.hpp

@@ -1,6 +1,6 @@
 // Copyright Kevlin Henney, 2000-2005.
 // Copyright Alexander Nasonov, 2006-2010.
-// Copyright Antony Polukhin, 2011-2014.
+// Copyright Antony Polukhin, 2011-2026.
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -18,165 +18,58 @@
 #ifndef BOOST_LEXICAL_CAST_TRY_LEXICAL_CONVERT_HPP
 #define BOOST_LEXICAL_CAST_TRY_LEXICAL_CONVERT_HPP
 
+#include <boost/lexical_cast/detail/config.hpp>
+
+#if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
+
+#ifndef BOOST_LEXICAL_CAST_INTERFACE_UNIT
 #include <boost/config.hpp>
 #ifdef BOOST_HAS_PRAGMA_ONCE
 #   pragma once
 #endif
 
-#if defined(__clang__) || (defined(__GNUC__) && \
-    !(defined(__INTEL_COMPILER) || defined(__ICL) || defined(__ICC) || defined(__ECC)) && \
-    (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)))
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wuninitialized"
+#include <type_traits>
 #endif
 
-#include <string>
-#include <boost/mpl/bool.hpp>
-#include <boost/mpl/identity.hpp>
-#include <boost/mpl/if.hpp>
-#include <boost/type_traits/is_same.hpp>
-#include <boost/type_traits/is_arithmetic.hpp>
-
+#include <boost/lexical_cast/detail/buffer_view.hpp>
 #include <boost/lexical_cast/detail/is_character.hpp>
 #include <boost/lexical_cast/detail/converter_numeric.hpp>
 #include <boost/lexical_cast/detail/converter_lexical.hpp>
 
-#include <boost/range/iterator_range_core.hpp>
-#include <boost/container/container_fwd.hpp>
-
 namespace boost {
     namespace detail
     {
-        template<typename T>
-        struct is_stdstring
-            : boost::false_type
-        {};
-
-        template<typename CharT, typename Traits, typename Alloc>
-        struct is_stdstring< std::basic_string<CharT, Traits, Alloc> >
-            : boost::true_type
-        {};
-
-        template<typename CharT, typename Traits, typename Alloc>
-        struct is_stdstring< boost::container::basic_string<CharT, Traits, Alloc> >
-            : boost::true_type
-        {};
-
         template<typename Target, typename Source>
-        struct is_arithmetic_and_not_xchars
-        {
-            typedef boost::mpl::bool_<
-                    !(boost::detail::is_character<Target>::value) &&
-                    !(boost::detail::is_character<Source>::value) &&
-                    boost::is_arithmetic<Source>::value &&
-                    boost::is_arithmetic<Target>::value
-                > type;
-        
-            BOOST_STATIC_CONSTANT(bool, value = (
-                type::value
-            ));
-        };
-
-        /*
-         * is_xchar_to_xchar<Target, Source>::value is true, 
-         * Target and Souce are char types of the same size 1 (char, signed char, unsigned char).
-         */
-        template<typename Target, typename Source>
-        struct is_xchar_to_xchar 
-        {
-            typedef boost::mpl::bool_<
-                     sizeof(Source) == sizeof(Target) &&
-                     sizeof(Source) == sizeof(char) &&
-                     boost::detail::is_character<Target>::value &&
-                     boost::detail::is_character<Source>::value
-                > type;
-                
-            BOOST_STATIC_CONSTANT(bool, value = (
-                type::value
-            ));
-        };
-
-        template<typename Target, typename Source>
-        struct is_char_array_to_stdstring
-            : boost::false_type
-        {};
-
-        template<typename CharT, typename Traits, typename Alloc>
-        struct is_char_array_to_stdstring< std::basic_string<CharT, Traits, Alloc>, CharT* >
-            : boost::true_type
-        {};
-
-        template<typename CharT, typename Traits, typename Alloc>
-        struct is_char_array_to_stdstring< std::basic_string<CharT, Traits, Alloc>, const CharT* >
-            : boost::true_type
-        {};
-
-        template<typename CharT, typename Traits, typename Alloc>
-        struct is_char_array_to_stdstring< boost::container::basic_string<CharT, Traits, Alloc>, CharT* >
-            : boost::true_type
-        {};
-
-        template<typename CharT, typename Traits, typename Alloc>
-        struct is_char_array_to_stdstring< boost::container::basic_string<CharT, Traits, Alloc>, const CharT* >
-            : boost::true_type
-        {};
-
-        template <typename Target, typename Source>
-        struct copy_converter_impl
-        {
-// MSVC fail to forward an array (DevDiv#555157 "SILENT BAD CODEGEN triggered by perfect forwarding",
-// fixed in 2013 RTM).
-#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && (!defined(BOOST_MSVC) || BOOST_MSVC >= 1800)
-            template <class T>
-            static inline bool try_convert(T&& arg, Target& result) {
-                result = static_cast<T&&>(arg); // eqaul to `result = std::forward<T>(arg);`
-                return true;
-            }
-#else
-            static inline bool try_convert(const Source& arg, Target& result) {
-                result = arg;
-                return true;
-            }
-#endif
-        };
+        using is_arithmetic_and_not_xchars = std::integral_constant<
+            bool,
+            !(boost::detail::is_character<Target>::value) &&
+                !(boost::detail::is_character<Source>::value) &&
+                std::is_arithmetic<Source>::value &&
+                std::is_arithmetic<Target>::value
+        >;
     }
 
     namespace conversion { namespace detail {
 
+BOOST_LEXICAL_CAST_BEGIN_MODULE_EXPORT
+
         template <typename Target, typename Source>
         inline bool try_lexical_convert(const Source& arg, Target& result)
         {
-            typedef BOOST_DEDUCED_TYPENAME boost::detail::array_to_pointer_decay<Source>::type src;
+            static_assert(
+                !std::is_volatile<Source>::value,
+                "Boost.LexicalCast does not support volatile input");
 
-            typedef boost::mpl::bool_<
-                boost::detail::is_xchar_to_xchar<Target, src >::value ||
-                boost::detail::is_char_array_to_stdstring<Target, src >::value ||
-                (
-                     boost::is_same<Target, src >::value &&
-                     boost::detail::is_stdstring<Target >::value
-                ) ||
-                (
-                     boost::is_same<Target, src >::value &&
-                     boost::detail::is_character<Target >::value
-                )
-            > shall_we_copy_t;
+            typedef typename boost::detail::array_to_pointer_decay<Source>::type src;
 
             typedef boost::detail::is_arithmetic_and_not_xchars<Target, src >
                 shall_we_copy_with_dynamic_check_t;
 
-            // We do evaluate second `if_` lazily to avoid unnecessary instantiations
-            // of `shall_we_copy_with_dynamic_check_t` and improve compilation times.
-            typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c<
-                shall_we_copy_t::value,
-                boost::mpl::identity<boost::detail::copy_converter_impl<Target, src > >,
-                boost::mpl::if_<
-                     shall_we_copy_with_dynamic_check_t,
-                     boost::detail::dynamic_num_converter_impl<Target, src >,
-                     boost::detail::lexical_converter_impl<Target, src >
-                >
-            >::type caster_type_lazy;
-
-            typedef BOOST_DEDUCED_TYPENAME caster_type_lazy::type caster_type;
+            typedef typename std::conditional<
+                 shall_we_copy_with_dynamic_check_t::value,
+                 boost::detail::dynamic_num_converter_impl<Target, src >,
+                 boost::detail::lexical_converter_impl<Target, src >
+            >::type caster_type;
 
             return caster_type::try_convert(arg, result);
         }
@@ -184,29 +77,29 @@ namespace boost {
         template <typename Target, typename CharacterT>
         inline bool try_lexical_convert(const CharacterT* chars, std::size_t count, Target& result)
         {
-            BOOST_STATIC_ASSERT_MSG(
+            static_assert(
                 boost::detail::is_character<CharacterT>::value,
                 "This overload of try_lexical_convert is meant to be used only with arrays of characters."
             );
             return ::boost::conversion::detail::try_lexical_convert(
-                ::boost::iterator_range<const CharacterT*>(chars, chars + count), result
+                ::boost::conversion::detail::make_buffer_view(chars, chars + count),
+                result
             );
         }
+BOOST_LEXICAL_CAST_END_MODULE_EXPORT
 
     }} // namespace conversion::detail
 
     namespace conversion {
+BOOST_LEXICAL_CAST_BEGIN_MODULE_EXPORT
         // ADL barrier
         using ::boost::conversion::detail::try_lexical_convert;
+BOOST_LEXICAL_CAST_END_MODULE_EXPORT
     }
 
 } // namespace boost
 
-#if defined(__clang__) || (defined(__GNUC__) && \
-    !(defined(__INTEL_COMPILER) || defined(__ICL) || defined(__ICC) || defined(__ECC)) && \
-    (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)))
-#pragma GCC diagnostic pop
-#endif
+#endif  // #if !defined(BOOST_USE_MODULES) || defined(BOOST_LEXICAL_CAST_INTERFACE_UNIT)
 
 #endif // BOOST_LEXICAL_CAST_TRY_LEXICAL_CONVERT_HPP
 

meta/libraries.json

@@ -11,5 +11,6 @@
     ],
     "maintainers": [
         "Antony Polukhin <antoshkka -at- gmail.com>"
-    ]
+    ],
+    "cxxstd": "11"
 }

modules/boost_lexical_cast.cppm

@@ -0,0 +1,57 @@
+// Copyright (c) 2016-2025 Antony Polukhin
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// To compile manually use a command like the folowing:
+// clang++ -I ../include -std=c++20 --precompile -x c++-module boost_lexical_cast.cppm
+
+module;
+
+#include <boost/assert.hpp>
+#include <boost/config.hpp>
+#include <boost/config/workaround.hpp>
+#include <boost/container/container_fwd.hpp>
+#include <boost/core/cmath.hpp>
+#include <boost/core/noncopyable.hpp>
+#include <boost/core/snprintf.hpp>
+#include <boost/limits.hpp>
+#include <boost/throw_exception.hpp>
+
+#include <boost/detail/basic_pointerbuf.hpp>
+
+#ifndef BOOST_LEXICAL_CAST_USE_STD_MODULE
+#include <array>
+#include <climits>
+#include <cstddef>
+#include <cstdio>
+#include <cstring>
+#ifndef BOOST_NO_CWCHAR
+#   include <cwchar>
+#endif
+#include <exception>
+#include <iosfwd>
+#include <istream>
+#ifndef BOOST_NO_STD_LOCALE
+#   include <locale>
+#endif
+#include <sstream>
+#include <string>
+#include <string_view>
+#include <typeinfo>
+#include <type_traits>
+#endif
+
+#define BOOST_LEXICAL_CAST_INTERFACE_UNIT
+
+export module boost.lexical_cast;
+
+#ifdef BOOST_LEXICAL_CAST_USE_STD_MODULE
+import std;
+#endif
+
+#ifdef __clang__
+#   pragma clang diagnostic ignored "-Winclude-angled-in-module-purview"
+#endif
+
+#include <boost/lexical_cast.hpp>

modules/usage_sample.cpp

@@ -0,0 +1,16 @@
+// Copyright (c) 2024-2025 Antony Polukhin
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// To compile manually use a command like the following:
+// clang++ -std=c++20 -fmodule-file=lexical_cast.pcm lexical_cast.pcm usage_sample.cpp
+
+//[lexical_cast_module_example
+import boost.lexical_cast;
+
+int main() {
+    return boost::lexical_cast<int>("0");
+}
+//]
+

perf/Jamfile.v2

@@ -1,5 +1,5 @@
 #==============================================================================
-#   Copyright (c) 2012 Antony Polukhin
+#   Copyright Antony Polukhin, 2012-2026.
 #
 #   Distributed under the Boost Software License, Version 1.0. (See accompanying
 #   file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

perf/performance_test.cpp

@@ -1,4 +1,4 @@
-//  (C) Copyright Antony Polukhin 2012.
+//  (C) Copyright Antony Polukhin, 2012-2026.
 //  Use, modification and distribution are subject to the
 //  Boost Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
@@ -14,10 +14,15 @@
 
 #include <boost/lexical_cast.hpp>
 
-#include <boost/chrono.hpp>
 #include <fstream>
 #include <cstring>
+#include <string_view>
+#include <type_traits>
+
+#include <boost/array.hpp>
+#include <boost/chrono.hpp>
 #include <boost/container/string.hpp>
+#include <boost/range/iterator_range.hpp>
 
 // File to output data
 std::fstream fout;
@@ -91,6 +96,12 @@ struct structure_sprintf {
         sprintf(buffer, conv, in_val.c_str());
         OutT out_val(buffer);
     }
+
+    template <class OutT, class BufferT>
+    static inline void test(BufferT* buffer, std::string_view in_val, const char* const conv) {
+        sprintf(buffer, conv, in_val.data());  // in_val is zero terminated in this program
+        OutT out_val(buffer);
+    }
 };
 
 struct structure_sscanf {
@@ -117,6 +128,12 @@ struct structure_sscanf {
         OutT out_val;
         sscanf(in_val.begin(), conv, &out_val);
     }
+
+    template <class OutT, class BufferT>
+    static inline void test(BufferT* /*buffer*/, std::string_view in_val, const char* const conv) {
+        OutT out_val;
+        sscanf(in_val.data(), conv, &out_val);  // in_val is zero terminated in this program
+    }
 };
 
 struct structure_fake {
@@ -226,7 +243,7 @@ static inline void perf_test_impl(const FromT& in_val, const char* const conv) {
                 lexical_cast_time.count(),
                 ss_constr_time.count(),
                 ss_noconstr_time.count(),
-                boost::is_same<SprintfT, structure_fake>::value ? fake_test_value : printf_time.count()
+                std::is_same<SprintfT, structure_fake>::value ? fake_test_value : printf_time.count()
     );
 }
 
@@ -312,6 +329,12 @@ struct to_array_50 {
     }
 };
 
+struct to_string_view {
+    std::string_view operator()(const char* const c) const {
+        return std::string_view{c};
+    }
+};
+
 int main(int argc, char** argv) {
     BOOST_ASSERT(argc >= 2);
     std::string output_path(argv[1]);
@@ -354,6 +377,7 @@ int main(int argc, char** argv) {
     string_like_test_set<to_uchar_conv>("unsigned char*");
     string_like_test_set<to_schar_conv>("signed char*");
     string_like_test_set<to_iterator_range>("iterator_range<char*>");
+    string_like_test_set<to_string_view>("std::string_view");
     string_like_test_set<to_array_50>("array<char, 50>");
 
     perf_test<int, structure_fake>("int->int", 100, "");

test/CMakeLists.txt

@@ -0,0 +1,84 @@
+# Copyright Antony Polukhin, 2021-2026.
+#
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
+
+if(NOT TARGET tests)
+  add_custom_target(tests)
+endif()
+
+function(boost_lexical_cast_add_test_impl test_name test_file libs)
+    add_executable(${test_name} ${test_file})
+    target_link_libraries(${test_name} PRIVATE ${libs})
+    add_test(NAME ${test_name} COMMAND ${test_name})
+    add_dependencies(tests ${test_name})
+endfunction()
+
+function(boost_lexical_cast_add_test name libs)
+    set(test_name lexical_cast_${name})
+    set(test_file ${name}.cpp)
+    boost_lexical_cast_add_test_impl(${test_name} ${test_file} "Boost::lexical_cast;${libs}")
+endfunction()
+
+boost_lexical_cast_add_test(lexical_cast_test Boost::type_traits)
+boost_lexical_cast_add_test(loopback_test "")
+boost_lexical_cast_add_test(abstract_test "")
+boost_lexical_cast_add_test(noncopyable_test "")
+boost_lexical_cast_add_test(vc8_bug_test "")
+boost_lexical_cast_add_test(implicit_convert "")
+boost_lexical_cast_add_test(wchars_test "")
+boost_lexical_cast_add_test(float_types_test "")
+
+if(NOT MSVC)
+    # Make sure that LexicalCast works the same way as some of the C++ Standard Libraries
+    boost_lexical_cast_add_test_impl(lexical_cast_float_types_non_opt float_types_test.cpp Boost::lexical_cast)
+    target_compile_definitions(lexical_cast_float_types_non_opt PRIVATE BOOST_LEXICAL_CAST_DETAIL_TEST_ON_OLD)
+endif()
+
+boost_lexical_cast_add_test(inf_nan_test "")
+boost_lexical_cast_add_test(containers_test "")
+boost_lexical_cast_add_test(empty_input_test Boost::range)
+boost_lexical_cast_add_test(pointers_test "")
+
+if(MSVC)
+    add_executable(lexical_cast_typedefed_wchar_test_compile typedefed_wchar_test.cpp)
+    target_compile_options(lexical_cast_typedefed_wchar_test_compile PRIVATE "/Zc:wchar_t-")
+
+    boost_lexical_cast_add_test(typedefed_wchar_test_runtime "")
+    target_compile_options(lexical_cast_typedefed_wchar_test_runtime PRIVATE "/Zc:wchar_t-")
+endif()
+
+boost_lexical_cast_add_test(no_locale_test Boost::range)
+target_compile_definitions(lexical_cast_no_locale_test
+    PRIVATE
+      BOOST_NO_STD_LOCALE
+      BOOST_LEXICAL_CAST_ASSUME_C_LOCALE
+)
+
+boost_lexical_cast_add_test_impl(lexical_cast_no_exceptions_test no_exceptions_test.cpp "Boost::container;Boost::range")
+target_include_directories(lexical_cast_no_exceptions_test PRIVATE ../include)
+target_compile_definitions(lexical_cast_no_exceptions_test
+    PRIVATE
+      _HAS_EXCEPTIONS=0 # MSVC stdlib
+      _STLP_NO_EXCEPTIONS # STLPort
+)
+if(MSVC)
+    target_compile_definitions(lexical_cast_no_exceptions_test PRIVATE BOOST_NO_EXCEPTIONS)
+endif()
+target_compile_options(lexical_cast_no_exceptions_test PRIVATE "-fno-exceptions")
+
+boost_lexical_cast_add_test(iterator_range_test Boost::range)
+boost_lexical_cast_add_test(string_view_test Boost::utility)
+boost_lexical_cast_add_test(arrays_test Boost::array)
+boost_lexical_cast_add_test(integral_types_test Boost::type_traits)
+boost_lexical_cast_add_test(stream_detection_test "")
+boost_lexical_cast_add_test(stream_traits_test "Boost::array;Boost::range;Boost::utility")
+
+boost_lexical_cast_add_test(filesystem_test Boost::filesystem)
+boost_lexical_cast_add_test(try_lexical_convert "")
+
+file(GLOB EXAMPLE_FILES "../example/*.cpp")
+foreach (testsourcefile ${EXAMPLE_FILES})
+    get_filename_component(testname ${testsourcefile} NAME_WE)
+    boost_lexical_cast_add_test_impl(lexical_cast_example_${testname} ${testsourcefile} "Boost::variant;Boost::date_time")
+endforeach()

test/Jamfile.v2

@@ -1,16 +1,20 @@
 # Copyright (C) 2001-2003 Douglas Gregor
-# Copyright (C) 2011-2014 Antony Polukhin
+# Copyright Antony Polukhin, 2011-2026.
 #
 # Distributed under the Boost Software License, Version 1.0. (See accompanying
 # file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 #
 
+require-b2 5.0.1 ;
+import-search /boost/config/checks ;
+import config : requires ;
 import testing ;
 import feature ;
 
 project
     : requirements
-        <library>/boost/test//boost_unit_test_framework
+        <library>/boost/lexical_cast//boost_lexical_cast
+        [ requires cxx11_rvalue_references cxx11_static_assert cxx11_template_aliases ]
         <link>static
         <toolset>gcc-4.7:<cxxflags>-ftrapv
         <toolset>gcc-4.6:<cxxflags>-ftrapv
@@ -19,53 +23,71 @@ project
         <warnings>all
         # set warnings as errors for those compilers we know we get warning free:
         <toolset>gcc:<cxxflags>-Wextra
-        <toolset>gcc:<cxxflags>-Wno-uninitialized
+
+        # Not a lexical_cast related warning: boost/preprocessor/variadic/elem.hpp:29:46: warning: variadic macros are a C99 feature
+        <toolset>clang:<cxxflags>-Wno-variadic-macros
+        <toolset>gcc:<cxxflags>-Wno-variadic-macros
+
+        # Not a lexical_cast related warning: boost/mpl/aux_/preprocessed/gcc/greater_equal.hpp:78:1: warning: empty macro arguments are a C99 feature [-Wc99-extensions]
+        #                                     boost/mpl/iter_fold.hpp:45:1: warning: empty macro arguments are a C99 feature [-Wc99-extensions]
+        <toolset>clang:<cxxflags>-Wno-c99-extensions
+
+        <library>/boost/array//boost_array
+        <library>/boost/range//boost_range
+        <library>/boost/utility//boost_utility
     ;
 
 # Thanks to Steven Watanabe for helping with <nowchar> feature
 feature.feature nowchar : on :
  composite optional propagated link-incompatible ;
-feature.compose <nowchar>on : <cxxflags>/Zc:wchar_t- ;
+feature.compose <nowchar>on : <cxxflags>"/Zc:wchar_t-" ;
 
 test-suite conversion
   : [ run lexical_cast_test.cpp ]
-    [ run lexical_cast_loopback_test.cpp ]
-    [ run lexical_cast_abstract_test.cpp ]
-    [ run lexical_cast_noncopyable_test.cpp ]
-    [ run lexical_cast_vc8_bug_test.cpp ]
-    [ run lexical_cast_wchars_test.cpp ]
-    [ run lexical_cast_float_types_test.cpp ]
-    [ run lexical_cast_inf_nan_test.cpp ]
-    [ run lexical_cast_containers_test.cpp : : : <toolset>gcc:<cxxflags>-Wno-long-long <toolset>clang:<cxxflags>-Wno-long-long ]
-    [ run lexical_cast_empty_input_test.cpp ]
-    [ run lexical_cast_pointers_test.cpp ]
-    [ compile lexical_cast_typedefed_wchar_test.cpp : <toolset>msvc:<nowchar>on ]
-    [ run lexical_cast_typedefed_wchar_test_runtime.cpp : : : <toolset>msvc:<nowchar>on <toolset>msvc,<stdlib>stlport:<build>no ]
-    [ run lexical_cast_no_locale_test.cpp : : : <define>BOOST_NO_STD_LOCALE <define>BOOST_LEXICAL_CAST_ASSUME_C_LOCALE ]
-    [ run lexical_cast_no_exceptions_test.cpp : : : <define>BOOST_NO_EXCEPTIONS
-      <toolset>gcc-4.3:<cxxflags>-fno-exceptions
-      <toolset>gcc-4.4:<cxxflags>-fno-exceptions
-      <toolset>gcc-4.5:<cxxflags>-fno-exceptions
-      <toolset>gcc-4.6:<cxxflags>-fno-exceptions
-      <toolset>gcc-4.7:<cxxflags>-fno-exceptions
-      <toolset>gcc-4.8:<cxxflags>-fno-exceptions
-      <toolset>clang:<cxxflags>-fno-exceptions
+    [ run loopback_test.cpp ]
+    [ run abstract_test.cpp ]
+    [ run noncopyable_test.cpp ]
+    [ run vc8_bug_test.cpp ]
+    [ run implicit_convert.cpp ]
+    [ run wchars_test.cpp ]
+    [ run float_types_test.cpp ]
+
+    # Make sure that LexicalCast works the same way as some of the C++ Standard Libraries
+    [ run float_types_test.cpp : : : <define>BOOST_LEXICAL_CAST_DETAIL_TEST_ON_OLD
+        <toolset>msvc:<build>no         # could have outdated behavior in some border cases
+        <target-os>darwin:<build>no     # may have outdated behavior in some border cases
+        : float_types_non_opt
     ]
-    [ run lexical_cast_iterator_range_test.cpp ]
-    [ run lexical_cast_arrays_test.cpp ]
-    [ run lexical_cast_integral_types_test.cpp ]
-    [ run lexical_cast_stream_detection_test.cpp ]
-    [ run lexical_cast_stream_traits_test.cpp ]
-    [ compile-fail lexical_cast_to_pointer_test.cpp ]
-    [ run lexical_cast_filesystem_test.cpp ../../filesystem/build//boost_filesystem/<link>static ]
-    [ run lexical_cast_try_lexical_convert.cpp ]
-    [ run lexical_cast_no_comp_time_prcision.cpp ]
+
+    [ run inf_nan_test.cpp ]
+    [ run containers_test.cpp : : : <toolset>gcc:<cxxflags>-Wno-long-long <toolset>clang:<cxxflags>-Wno-long-long ]
+    [ run empty_input_test.cpp ]
+    [ run pointers_test.cpp ]
+    [ compile typedefed_wchar_test.cpp : <toolset>msvc:<nowchar>on <library>/boost/date_time//boost_date_time ]
+    [ run typedefed_wchar_test_runtime.cpp : : : <toolset>msvc:<nowchar>on <toolset>msvc,<stdlib>stlport:<build>no ]
+    [ run no_locale_test.cpp : : : <define>BOOST_NO_STD_LOCALE <define>BOOST_LEXICAL_CAST_ASSUME_C_LOCALE ]
+    [ run no_exceptions_test.cpp : : : <exception-handling>off
+        <define>_HAS_EXCEPTIONS=0 # MSVC stdlib
+        <define>_STLP_NO_EXCEPTIONS # STLPort
+    ]
+    [ run iterator_range_test.cpp ]
+    [ run string_view_test.cpp ]
+    [ run arrays_test.cpp : : :
+        <toolset>msvc:<cxxflags>/wd4512 # assignment operator could not be generated
+    ]
+    [ run integral_types_test.cpp ]
+    [ run stream_detection_test.cpp ]
+    [ run stream_traits_test.cpp ]
+    [ compile-fail to_pointer_test.cpp ]
+    [ compile-fail from_volatile.cpp ]
+    [ run filesystem_test.cpp /boost/filesystem//boost_filesystem : : : <toolset>gcc,<target-os>windows:<build>no ] # Boost.Atomic no longer supports MinGW
+    [ run try_lexical_convert.cpp ]
   ;
 
-# Assuring that examples compile and run. Adding sources from `example` directory to the `conversion` test suite. 
+# Assuring that examples compile and run. Adding sources from `example` directory to the `conversion` test suite.
 for local p in [ glob ../example/*.cpp ]
 {
-    conversion += [ run $(p) ] ;
+    conversion += [ run $(p) : : : <library>/boost/variant//boost_variant <library>/boost/date_time//boost_date_time ] ;
 }
 
 

test/abstract_test.cpp

@@ -3,6 +3,7 @@
 //  See http://www.boost.org for most recent version, including documentation.
 //
 //  Copyright Sergey Shandar 2005, Alexander Nasonov, 2007.
+//  Copyright Antony Polukhin, 2023-2026.
 //
 //  Distributed under the Boost
 //  Software License, Version 1.0. (See accompanying file
@@ -11,34 +12,15 @@
 // Test abstract class. Bug 1358600:
 // http://sf.net/tracker/?func=detail&aid=1358600&group_id=7586&atid=107586
 
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
+#include <boost/core/lightweight_test.hpp>
 
 #include <boost/lexical_cast.hpp>
-#include <boost/test/unit_test.hpp>
-
-using namespace boost;
-
-void test_abstract();
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast unit test");
-    suite->add(BOOST_TEST_CASE(&test_abstract));
-
-    return suite;
-}
 
 class A
 {
 public:
     virtual void out(std::ostream &) const = 0;
+    virtual ~A() {}
 };
 
 class B: public A
@@ -56,6 +38,12 @@ std::ostream &operator<<(std::ostream &O, const A &a)
 void test_abstract()
 {
     const A &a = B();
-    BOOST_CHECK(boost::lexical_cast<std::string>(a) == "B");
+    BOOST_TEST(boost::lexical_cast<std::string>(a) == "B");
+}
+
+int main()
+{
+    test_abstract();
+    return boost::report_errors();
 }
 

test/appveyor.yml

@@ -0,0 +1,100 @@
+# Use, modification, and distribution are
+# subject to the Boost Software License, Version 1.0. (See accompanying
+# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#
+# Copyright Antony Polukhin, 2016-2026.
+
+#
+# See https://svn.boost.org/trac/boost/wiki/TravisCoverals for description of this file
+# and how it can be used with Boost libraries.
+#
+# File revision #6
+
+init:
+    # boost-local/libs/ folder to put this library into. This may be useful, if you're for example running Travis
+    # from `Boost.DLL` repo while Boost already has `dll` and with to replace `dll` with content of`Boost.DLL`.
+    #
+    # Otherwise just leave the default value - set BOOST_LIBS_FOLDER=%APPVEYOR_PROJECT_NAME%
+    - set BOOST_LIBS_FOLDER=%APPVEYOR_PROJECT_NAME%
+
+###############################################################################################################
+# From this point and below code is same for all the Boost libs
+###############################################################################################################
+
+version: 1.74.{build}-{branch}
+
+# branches to build
+branches:
+  except:
+    - gh-pages
+
+skip_tags: true
+
+environment:
+  matrix:
+#    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+#      TOOLSET: msvc # TODO: clang-win ???
+#      ADDRMD: 32,64
+#      CXXSTD: 17,latest
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: msvc # clang-win has problems with structured bindings - it can not correclty use std::tuple_size
+      ADDRMD: 32,64
+      CXXSTD: 17,latest
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: msvc # clang-win has problems with structured bindings - it can not correclty use std::tuple_size
+      ADDRMD: 32,64
+      CXXSTD: 17,latest
+      CXXFLAGS: /permissive-
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: msvc # clang-win has problems with structured bindings - it can not correclty use std::tuple_size
+      ADDRMD: 32,64
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      ADDPATH: C:\cygwin\bin;
+      TOOLSET: gcc
+      CXXSTD: 14,1z
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      ADDPATH: C:\cygwin64\bin;
+      TOOLSET: gcc
+      CXXSTD: 14,1z
+#    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+#      ADDPATH: C:\mingw\bin;
+#      TOOLSET: gcc
+#      CXXSTD: 14,1z
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      ADDPATH: C:\mingw-w64\x86_64-7.2.0-posix-seh-rt_v5-rev1\mingw64\bin;
+      TOOLSET: gcc
+      CXXSTD: 14,1z
+
+before_build:
+    - set BOOST_BRANCH=develop
+    - if "%APPVEYOR_REPO_BRANCH%" == "master" set BOOST_BRANCH=master
+    - echo "Testing %BOOST_LIBS_FOLDER%"
+    # Cloning Boost libraries (fast nondeep cloning)
+    - set BOOST=C:/boost-local
+    - git clone -b %BOOST_BRANCH% --depth 10 https://github.com/boostorg/boost.git %BOOST%
+    - cd %BOOST%
+    - git submodule update --init --depth 10 tools/build tools/boostdep
+
+    - echo "rm -rf %BOOST%/libs/%BOOST_LIBS_FOLDER%"
+    - rm -rf %BOOST%/libs/%BOOST_LIBS_FOLDER%
+    - mv %APPVEYOR_BUILD_FOLDER% %BOOST%/libs/%BOOST_LIBS_FOLDER%
+    - python tools/boostdep/depinst/depinst.py --git_args "--depth 10 --jobs 2" -I example -I examples %BOOST_LIBS_FOLDER%
+
+build_script:
+    - cmd /c bootstrap
+    - b2.exe headers
+    - cd %BOOST%/libs/%BOOST_LIBS_FOLDER%/test
+
+after_build:
+before_test:
+test_script:
+  - PATH=%ADDPATH%%PATH%
+  - if not "%CXXSTD%" == "" set CXXSTD=cxxstd=%CXXSTD%
+  - if not "%ADDRMD%" == "" set ADDRMD=address-model=%ADDRMD%
+  - echo "Running command ..\..\..\b2 -j3 toolset=%TOOLSET% %CXXSTD% %ADDRMD% variant=debug,release"
+  - ..\..\..\b2.exe -j3 toolset=%TOOLSET% %CXXSTD% %ADDRMD% variant=debug,release cxxflags="-DBOOST_TRAVISCI_BUILD %CXXFLAGS%"
+
+after_test:
+on_success:
+on_failure:
+on_finish:

test/arrays_test.cpp

@@ -2,49 +2,30 @@
 //
 //  See http://www.boost.org for most recent version, including documentation.
 //
-//  Copyright Antony Polukhin, 2012.
+//  Copyright Antony Polukhin, 2012-2026.
 //
 //  Distributed under the Boost
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
 
-#include <boost/lexical_cast.hpp>
+#include <boost/core/lightweight_test.hpp>
 
-#include <boost/test/unit_test.hpp>
-    
 #include <boost/array.hpp>
 
-void testing_boost_array_output_conversion();
-void testing_std_array_output_conversion();
-
-void testing_boost_array_input_conversion();
-void testing_std_array_input_conversion();
+#include <boost/lexical_cast.hpp>
 
 using namespace boost;
 
-#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(_LIBCPP_VERSION)
+#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(_LIBCPP_VERSION) && !defined(BOOST_MSVC)
 #define BOOST_LC_RUNU16
 #endif
 
-#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(_LIBCPP_VERSION)
+#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(_LIBCPP_VERSION) && !defined(BOOST_MSVC)
 #define BOOST_LC_RUNU32
 #endif
 
-boost::unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("Testing boost::lexical_cast with boost::array and std::array");
-
-    suite->add(BOOST_TEST_CASE(testing_boost_array_output_conversion));
-    suite->add(BOOST_TEST_CASE(testing_std_array_output_conversion));
-    suite->add(BOOST_TEST_CASE(testing_boost_array_input_conversion));
-    suite->add(BOOST_TEST_CASE(testing_std_array_input_conversion));
-
-    return suite;
-}
-
 template <template <class, std::size_t> class ArrayT, class T>
-static void testing_template_array_output_on_spec_value(T val) 
+static void testing_template_array_output_on_spec_value(T val)
 {
     typedef ArrayT<char, 300>             arr_type;
     typedef ArrayT<char, 1>               short_arr_type;
@@ -58,44 +39,44 @@ static void testing_template_array_output_on_spec_value(T val)
 
     {
         arr_type res1 = lexical_cast<arr_type>(val);
-        BOOST_CHECK_EQUAL(&res1[0], ethalon);
+        BOOST_TEST_EQ(&res1[0], ethalon);
         const arr_type res2 = lexical_cast<arr_type>(val);
-        BOOST_CHECK_EQUAL(&res2[0], ethalon);
-        BOOST_CHECK_THROW(lexical_cast<short_arr_type>(val), boost::bad_lexical_cast);
-    }
-    
-    {
-        uarr_type res1 = lexical_cast<uarr_type>(val);
-        BOOST_CHECK_EQUAL(reinterpret_cast<char*>(&res1[0]), ethalon);
-        const uarr_type res2 = lexical_cast<uarr_type>(val);
-        BOOST_CHECK_EQUAL(reinterpret_cast<const char*>(&res2[0]), ethalon);
-        BOOST_CHECK_THROW(lexical_cast<ushort_arr_type>(val), boost::bad_lexical_cast);
-    }
-    
-    {
-        sarr_type res1 = lexical_cast<sarr_type>(val);
-        BOOST_CHECK_EQUAL(reinterpret_cast<char*>(&res1[0]), ethalon);
-        const sarr_type res2 = lexical_cast<sarr_type>(val);
-        BOOST_CHECK_EQUAL(reinterpret_cast<const char*>(&res2[0]), ethalon);
-        BOOST_CHECK_THROW(lexical_cast<sshort_arr_type>(val), boost::bad_lexical_cast);
+        BOOST_TEST_EQ(&res2[0], ethalon);
+        BOOST_TEST_THROWS(lexical_cast<short_arr_type>(val), boost::bad_lexical_cast);
     }
 
-#if !defined(BOOST_NO_STRINGSTREAM) && !defined(BOOST_NO_STD_WSTRING)
+    {
+        uarr_type res1 = lexical_cast<uarr_type>(val);
+        BOOST_TEST_EQ(reinterpret_cast<char*>(&res1[0]), ethalon);
+        const uarr_type res2 = lexical_cast<uarr_type>(val);
+        BOOST_TEST_EQ(reinterpret_cast<const char*>(&res2[0]), ethalon);
+        BOOST_TEST_THROWS(lexical_cast<ushort_arr_type>(val), boost::bad_lexical_cast);
+    }
+
+    {
+        sarr_type res1 = lexical_cast<sarr_type>(val);
+        BOOST_TEST_EQ(reinterpret_cast<char*>(&res1[0]), ethalon);
+        const sarr_type res2 = lexical_cast<sarr_type>(val);
+        BOOST_TEST_EQ(reinterpret_cast<const char*>(&res2[0]), ethalon);
+        BOOST_TEST_THROWS(lexical_cast<sshort_arr_type>(val), boost::bad_lexical_cast);
+    }
+
+#if !defined(BOOST_NO_STRINGSTREAM) && !defined(BOOST_NO_STD_WSTRING) && !defined(_LIBCPP_VERSION)
     typedef ArrayT<wchar_t, 300> warr_type;
     typedef ArrayT<wchar_t, 3> wshort_arr_type;
     std::wstring wethalon(L"100");
 
     {
         warr_type res = lexical_cast<warr_type>(val);
-        BOOST_CHECK(&res[0] == wethalon);
+        BOOST_TEST(&res[0] == wethalon);
     }
 
     {
         const warr_type res = lexical_cast<warr_type>(val);
-        BOOST_CHECK(&res[0] == wethalon);
+        BOOST_TEST(&res[0] == wethalon);
     }
-    
-    BOOST_CHECK_THROW(lexical_cast<wshort_arr_type>(val), boost::bad_lexical_cast);
+
+    BOOST_TEST_THROWS(lexical_cast<wshort_arr_type>(val), boost::bad_lexical_cast);
 
 #endif
 
@@ -106,15 +87,15 @@ static void testing_template_array_output_on_spec_value(T val)
 
     {
         u16arr_type res = lexical_cast<u16arr_type>(val);
-        BOOST_CHECK(&res[0] == u16ethalon);
+        BOOST_TEST(&res[0] == u16ethalon);
     }
 
     {
         const u16arr_type res = lexical_cast<u16arr_type>(val);
-        BOOST_CHECK(&res[0] == u16ethalon);
+        BOOST_TEST(&res[0] == u16ethalon);
     }
-    
-    BOOST_CHECK_THROW(lexical_cast<u16short_arr_type>(val), boost::bad_lexical_cast);
+
+    BOOST_TEST_THROWS(lexical_cast<u16short_arr_type>(val), boost::bad_lexical_cast);
 #endif
 
 #ifdef BOOST_LC_RUNU32
@@ -124,21 +105,21 @@ static void testing_template_array_output_on_spec_value(T val)
 
     {
         u32arr_type res = lexical_cast<u32arr_type>(val);
-        BOOST_CHECK(&res[0] == u32ethalon);
+        BOOST_TEST(&res[0] == u32ethalon);
     }
 
     {
         const u32arr_type res = lexical_cast<u32arr_type>(val);
-        BOOST_CHECK(&res[0] == u32ethalon);
+        BOOST_TEST(&res[0] == u32ethalon);
     }
-    
-    BOOST_CHECK_THROW(lexical_cast<u32short_arr_type>(val), boost::bad_lexical_cast);
+
+    BOOST_TEST_THROWS(lexical_cast<u32short_arr_type>(val), boost::bad_lexical_cast);
 #endif
 }
 
 
 template <template <class, std::size_t> class ArrayT>
-static void testing_template_array_output_on_char_value() 
+static void testing_template_array_output_on_char_value()
 {
     typedef ArrayT<char, 300>             arr_type;
     typedef ArrayT<char, 1>               short_arr_type;
@@ -153,48 +134,48 @@ static void testing_template_array_output_on_char_value()
 
     {
         arr_type res1 = lexical_cast<arr_type>(val);
-        BOOST_CHECK_EQUAL(&res1[0], ethalon);
+        BOOST_TEST_EQ(&res1[0], ethalon);
         const arr_type res2 = lexical_cast<arr_type>(val);
-        BOOST_CHECK_EQUAL(&res2[0], ethalon);
-        BOOST_CHECK_THROW(lexical_cast<short_arr_type>(val), boost::bad_lexical_cast);
-    }
-    
-    {
-        uarr_type res1 = lexical_cast<uarr_type>(val);
-        BOOST_CHECK_EQUAL(reinterpret_cast<char*>(&res1[0]), ethalon);
-        const uarr_type res2 = lexical_cast<uarr_type>(val);
-        BOOST_CHECK_EQUAL(reinterpret_cast<const char*>(&res2[0]), ethalon);
-        BOOST_CHECK_THROW(lexical_cast<ushort_arr_type>(val), boost::bad_lexical_cast);
-    }
-    
-    {
-        sarr_type res1 = lexical_cast<sarr_type>(val);
-        BOOST_CHECK_EQUAL(reinterpret_cast<char*>(&res1[0]), ethalon);
-        const sarr_type res2 = lexical_cast<sarr_type>(val);
-        BOOST_CHECK_EQUAL(reinterpret_cast<const char*>(&res2[0]), ethalon);
-        BOOST_CHECK_THROW(lexical_cast<sshort_arr_type>(val), boost::bad_lexical_cast);
+        BOOST_TEST_EQ(&res2[0], ethalon);
+        BOOST_TEST_THROWS(lexical_cast<short_arr_type>(val), boost::bad_lexical_cast);
     }
 
-#if !defined(BOOST_NO_STRINGSTREAM) && !defined(BOOST_NO_STD_WSTRING)
+    {
+        uarr_type res1 = lexical_cast<uarr_type>(val);
+        BOOST_TEST_EQ(reinterpret_cast<char*>(&res1[0]), ethalon);
+        const uarr_type res2 = lexical_cast<uarr_type>(val);
+        BOOST_TEST_EQ(reinterpret_cast<const char*>(&res2[0]), ethalon);
+        BOOST_TEST_THROWS(lexical_cast<ushort_arr_type>(val), boost::bad_lexical_cast);
+    }
+
+    {
+        sarr_type res1 = lexical_cast<sarr_type>(val);
+        BOOST_TEST_EQ(reinterpret_cast<char*>(&res1[0]), ethalon);
+        const sarr_type res2 = lexical_cast<sarr_type>(val);
+        BOOST_TEST_EQ(reinterpret_cast<const char*>(&res2[0]), ethalon);
+        BOOST_TEST_THROWS(lexical_cast<sshort_arr_type>(val), boost::bad_lexical_cast);
+    }
+
+#if !defined(BOOST_NO_STRINGSTREAM) && !defined(BOOST_NO_STD_WSTRING) && !defined(_LIBCPP_VERSION)
     typedef ArrayT<wchar_t, 4> warr_type;
     typedef ArrayT<wchar_t, 3> wshort_arr_type;
     std::wstring wethalon(L"100");
 
     {
         warr_type res = lexical_cast<warr_type>(val);
-        BOOST_CHECK(&res[0] == wethalon);
+        BOOST_TEST(&res[0] == wethalon);
         warr_type res3 = lexical_cast<warr_type>(wethalon);
-        BOOST_CHECK(&res3[0] == wethalon);
+        BOOST_TEST(&res3[0] == wethalon);
     }
 
     {
         const warr_type res = lexical_cast<warr_type>(val);
-        BOOST_CHECK(&res[0] == wethalon);
+        BOOST_TEST(&res[0] == wethalon);
         const warr_type res3 = lexical_cast<warr_type>(wethalon);
-        BOOST_CHECK(&res3[0] == wethalon);
+        BOOST_TEST(&res3[0] == wethalon);
     }
-    
-    BOOST_CHECK_THROW(lexical_cast<wshort_arr_type>(val), boost::bad_lexical_cast);
+
+    BOOST_TEST_THROWS(lexical_cast<wshort_arr_type>(val), boost::bad_lexical_cast);
 
 #endif
 
@@ -206,24 +187,24 @@ static void testing_template_array_output_on_char_value()
     {
 #ifdef BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES
         u16arr_type res = lexical_cast<u16arr_type>(val);
-        BOOST_CHECK(&res[0] == u16ethalon);  
+        BOOST_TEST(&res[0] == u16ethalon);
 #endif
 
         u16arr_type res3 = lexical_cast<u16arr_type>(u16ethalon);
-        BOOST_CHECK(&res3[0] == u16ethalon);
+        BOOST_TEST(&res3[0] == u16ethalon);
     }
 
     {
 #ifdef BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES
         const u16arr_type res = lexical_cast<u16arr_type>(val);
-        BOOST_CHECK(&res[0] == u16ethalon);
+        BOOST_TEST(&res[0] == u16ethalon);
 #endif
         const u16arr_type res3 = lexical_cast<u16arr_type>(u16ethalon);
-        BOOST_CHECK(&res3[0] == u16ethalon);
+        BOOST_TEST(&res3[0] == u16ethalon);
     }
-    
+
     // Some compillers may throw std::bad_alloc here
-    BOOST_CHECK_THROW(lexical_cast<u16short_arr_type>(val), std::exception); 
+    BOOST_TEST_THROWS(lexical_cast<u16short_arr_type>(val), std::exception);
 #endif
 
 #ifdef BOOST_LC_RUNU32
@@ -234,34 +215,36 @@ static void testing_template_array_output_on_char_value()
     {
 #ifdef BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES
         u32arr_type res = lexical_cast<u32arr_type>(val);
-        BOOST_CHECK(&res[0] == u32ethalon);
+        BOOST_TEST(&res[0] == u32ethalon);
 #endif
         u32arr_type res3 = lexical_cast<u32arr_type>(u32ethalon);
-        BOOST_CHECK(&res3[0] == u32ethalon);
+        BOOST_TEST(&res3[0] == u32ethalon);
     }
 
     {
 #ifdef BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES
         const u32arr_type res = lexical_cast<u32arr_type>(val);
-        BOOST_CHECK(&res[0] == u32ethalon);
+        BOOST_TEST(&res[0] == u32ethalon);
 #endif
         const u32arr_type res3 = lexical_cast<u32arr_type>(u32ethalon);
-        BOOST_CHECK(&res3[0] == u32ethalon);
+        BOOST_TEST(&res3[0] == u32ethalon);
     }
-    
+
     // Some compillers may throw std::bad_alloc here
-    BOOST_CHECK_THROW(lexical_cast<u32short_arr_type>(val), std::exception);
+    BOOST_TEST_THROWS(lexical_cast<u32short_arr_type>(val), std::exception);
 #endif
 }
 
 
 void testing_boost_array_output_conversion()
-{   
+{
+#ifndef _LIBCPP_VERSION
     testing_template_array_output_on_char_value<boost::array>();
     testing_template_array_output_on_spec_value<boost::array>(100);
     testing_template_array_output_on_spec_value<boost::array>(static_cast<short>(100));
     testing_template_array_output_on_spec_value<boost::array>(static_cast<unsigned short>(100));
     testing_template_array_output_on_spec_value<boost::array>(static_cast<unsigned int>(100));
+#endif
 }
 
 void testing_std_array_output_conversion()
@@ -274,96 +257,99 @@ void testing_std_array_output_conversion()
     testing_template_array_output_on_spec_value<std::array>(static_cast<unsigned int>(100));
 #endif
 
-    BOOST_CHECK(true);
+    BOOST_TEST(true);
 }
 
 template <template <class, std::size_t> class ArrayT>
 static void testing_generic_array_input_conversion()
 {
     {
-        ArrayT<char, 4> var_zero_terminated = {{ '1', '0', '0', '\0'}}; 
-        BOOST_CHECK_EQUAL(lexical_cast<std::string>(var_zero_terminated), "100");
-        BOOST_CHECK_EQUAL(lexical_cast<int>(var_zero_terminated), 100);
+        ArrayT<char, 4> var_zero_terminated = {{ '1', '0', '0', '\0'}};
+        BOOST_TEST_EQ(lexical_cast<std::string>(var_zero_terminated), "100");
+        BOOST_TEST_EQ(lexical_cast<int>(var_zero_terminated), 100);
 
-        ArrayT<char, 3> var_none_terminated = {{ '1', '0', '0'}}; 
-        BOOST_CHECK_EQUAL(lexical_cast<std::string>(var_none_terminated), "100");
-        BOOST_CHECK_EQUAL(lexical_cast<short>(var_none_terminated), static_cast<short>(100));
+        ArrayT<char, 3> var_none_terminated = {{ '1', '0', '0'}};
+        BOOST_TEST_EQ(lexical_cast<std::string>(var_none_terminated), "100");
+        BOOST_TEST_EQ(lexical_cast<short>(var_none_terminated), static_cast<short>(100));
 
-        ArrayT<const char, 4> var_zero_terminated_const_char = {{ '1', '0', '0', '\0'}}; 
-        BOOST_CHECK_EQUAL(lexical_cast<std::string>(var_zero_terminated_const_char), "100");
+        ArrayT<const char, 4> var_zero_terminated_const_char = {{ '1', '0', '0', '\0'}};
+        BOOST_TEST_EQ(lexical_cast<std::string>(var_zero_terminated_const_char), "100");
 
-        ArrayT<const char, 3> var_none_terminated_const_char = {{ '1', '0', '0'}}; 
-        BOOST_CHECK_EQUAL(lexical_cast<std::string>(var_none_terminated_const_char), "100");
+        ArrayT<const char, 3> var_none_terminated_const_char = {{ '1', '0', '0'}};
+        BOOST_TEST_EQ(lexical_cast<std::string>(var_none_terminated_const_char), "100");
 
-        const ArrayT<char, 4> var_zero_terminated_const_var = {{ '1', '0', '0', '\0'}}; 
-        BOOST_CHECK_EQUAL(lexical_cast<std::string>(var_zero_terminated_const_var), "100");
+        const ArrayT<char, 4> var_zero_terminated_const_var = {{ '1', '0', '0', '\0'}};
+        BOOST_TEST_EQ(lexical_cast<std::string>(var_zero_terminated_const_var), "100");
 
-        const ArrayT<char, 3> var_none_terminated_const_var = {{ '1', '0', '0'}}; 
-        BOOST_CHECK_EQUAL(lexical_cast<std::string>(var_none_terminated_const_var), "100");
+        const ArrayT<char, 3> var_none_terminated_const_var = {{ '1', '0', '0'}};
+        BOOST_TEST_EQ(lexical_cast<std::string>(var_none_terminated_const_var), "100");
 
-        const ArrayT<const char, 4> var_zero_terminated_const_var_const_char = {{ '1', '0', '0', '\0'}}; 
-        BOOST_CHECK_EQUAL(lexical_cast<std::string>(var_zero_terminated_const_var_const_char), "100");
+        const ArrayT<const char, 4> var_zero_terminated_const_var_const_char = {{ '1', '0', '0', '\0'}};
+        BOOST_TEST_EQ(lexical_cast<std::string>(var_zero_terminated_const_var_const_char), "100");
 
-        const ArrayT<const char, 3> var_none_terminated_const_var_const_char = {{ '1', '0', '0'}}; 
-        BOOST_CHECK_EQUAL(lexical_cast<std::string>(var_none_terminated_const_var_const_char), "100");
-        BOOST_CHECK_EQUAL(lexical_cast<int>(var_none_terminated_const_var_const_char), 100);
+        const ArrayT<const char, 3> var_none_terminated_const_var_const_char = {{ '1', '0', '0'}};
+        BOOST_TEST_EQ(lexical_cast<std::string>(var_none_terminated_const_var_const_char), "100");
+        BOOST_TEST_EQ(lexical_cast<int>(var_none_terminated_const_var_const_char), 100);
     }
 
     {
-        const ArrayT<const unsigned char, 4> var_zero_terminated_const_var_const_char = {{ '1', '0', '0', '\0'}}; 
-        BOOST_CHECK_EQUAL(lexical_cast<std::string>(var_zero_terminated_const_var_const_char), "100");
+        const ArrayT<const unsigned char, 4> var_zero_terminated_const_var_const_char = {{ '1', '0', '0', '\0'}};
+        BOOST_TEST_EQ(lexical_cast<std::string>(var_zero_terminated_const_var_const_char), "100");
 
-        const ArrayT<const unsigned char, 3> var_none_terminated_const_var_const_char = {{ '1', '0', '0'}}; 
-        BOOST_CHECK_EQUAL(lexical_cast<std::string>(var_none_terminated_const_var_const_char), "100");
+        const ArrayT<const unsigned char, 3> var_none_terminated_const_var_const_char = {{ '1', '0', '0'}};
+        BOOST_TEST_EQ(lexical_cast<std::string>(var_none_terminated_const_var_const_char), "100");
     }
 
     {
-        const ArrayT<const signed char, 4> var_zero_terminated_const_var_const_char = {{ '1', '0', '0', '\0'}}; 
-        BOOST_CHECK_EQUAL(lexical_cast<std::string>(var_zero_terminated_const_var_const_char), "100");
+        const ArrayT<const signed char, 4> var_zero_terminated_const_var_const_char = {{ '1', '0', '0', '\0'}};
+        BOOST_TEST_EQ(lexical_cast<std::string>(var_zero_terminated_const_var_const_char), "100");
 
-        const ArrayT<const signed char, 3> var_none_terminated_const_var_const_char = {{ '1', '0', '0'}}; 
-        BOOST_CHECK_EQUAL(lexical_cast<std::string>(var_none_terminated_const_var_const_char), "100");
-        BOOST_CHECK_EQUAL(lexical_cast<unsigned int>(var_none_terminated_const_var_const_char), 100u);
+        const ArrayT<const signed char, 3> var_none_terminated_const_var_const_char = {{ '1', '0', '0'}};
+        BOOST_TEST_EQ(lexical_cast<std::string>(var_none_terminated_const_var_const_char), "100");
+        BOOST_TEST_EQ(lexical_cast<unsigned int>(var_none_terminated_const_var_const_char), 100u);
     }
 
 
 #if !defined(BOOST_NO_STRINGSTREAM) && !defined(BOOST_NO_STD_WSTRING)
     {
-        const ArrayT<const wchar_t, 4> var_zero_terminated_const_var_const_char = {{ L'1', L'0', L'0', L'\0'}}; 
-        BOOST_CHECK(lexical_cast<std::wstring>(var_zero_terminated_const_var_const_char) == L"100");
+        const ArrayT<const wchar_t, 4> var_zero_terminated_const_var_const_char = {{ L'1', L'0', L'0', L'\0'}};
+        BOOST_TEST(lexical_cast<std::wstring>(var_zero_terminated_const_var_const_char) == L"100");
 
-        const ArrayT<const wchar_t, 3> var_none_terminated_const_var_const_char = {{ L'1', L'0', L'0'}}; 
-        BOOST_CHECK(lexical_cast<std::wstring>(var_none_terminated_const_var_const_char) == L"100");
-        BOOST_CHECK_EQUAL(lexical_cast<int>(var_none_terminated_const_var_const_char), 100);
+        const ArrayT<const wchar_t, 3> var_none_terminated_const_var_const_char = {{ L'1', L'0', L'0'}};
+        BOOST_TEST(lexical_cast<std::wstring>(var_none_terminated_const_var_const_char) == L"100");
+        BOOST_TEST_EQ(lexical_cast<int>(var_none_terminated_const_var_const_char), 100);
     }
 #endif
 
 #ifdef BOOST_LC_RUNU16
     {
-        const ArrayT<const char16_t, 4> var_zero_terminated_const_var_const_char = {{ u'1', u'0', u'0', u'\0'}}; 
-        BOOST_CHECK(lexical_cast<std::u16string>(var_zero_terminated_const_var_const_char) == u"100");
-        BOOST_CHECK_EQUAL(lexical_cast<unsigned short>(var_zero_terminated_const_var_const_char), static_cast<unsigned short>(100));
+        const ArrayT<const char16_t, 4> var_zero_terminated_const_var_const_char = {{ u'1', u'0', u'0', u'\0'}};
+        BOOST_TEST(lexical_cast<std::u16string>(var_zero_terminated_const_var_const_char) == u"100");
+        BOOST_TEST_EQ(lexical_cast<unsigned short>(var_zero_terminated_const_var_const_char), static_cast<unsigned short>(100));
 
-        const ArrayT<const char16_t, 3> var_none_terminated_const_var_const_char = {{ u'1', u'0', u'0'}}; 
-        BOOST_CHECK(lexical_cast<std::u16string>(var_none_terminated_const_var_const_char) == u"100");
+        const ArrayT<const char16_t, 3> var_none_terminated_const_var_const_char = {{ u'1', u'0', u'0'}};
+        BOOST_TEST(lexical_cast<std::u16string>(var_none_terminated_const_var_const_char) == u"100");
     }
 #endif
 
 #ifdef BOOST_LC_RUNU32
     {
-        const ArrayT<const char32_t, 4> var_zero_terminated_const_var_const_char = {{ U'1', U'0', U'0', U'\0'}}; 
-        BOOST_CHECK(lexical_cast<std::u32string>(var_zero_terminated_const_var_const_char) == U"100");
+        const ArrayT<const char32_t, 4> var_zero_terminated_const_var_const_char = {{ U'1', U'0', U'0', U'\0'}};
+        BOOST_TEST(lexical_cast<std::u32string>(var_zero_terminated_const_var_const_char) == U"100");
 
-        const ArrayT<const char32_t, 3> var_none_terminated_const_var_const_char = {{ U'1', U'0', U'0'}}; 
-        BOOST_CHECK(lexical_cast<std::u32string>(var_none_terminated_const_var_const_char) == U"100");
-        BOOST_CHECK_EQUAL(lexical_cast<int>(var_none_terminated_const_var_const_char), 100);
+        const ArrayT<const char32_t, 3> var_none_terminated_const_var_const_char = {{ U'1', U'0', U'0'}};
+        BOOST_TEST(lexical_cast<std::u32string>(var_none_terminated_const_var_const_char) == U"100");
+        BOOST_TEST_EQ(lexical_cast<int>(var_none_terminated_const_var_const_char), 100);
     }
 #endif
 }
 
 void testing_boost_array_input_conversion()
 {
+#ifndef _LIBCPP_VERSION
     testing_generic_array_input_conversion<boost::array>();
+#endif
+    BOOST_TEST(true);
 }
 
 void testing_std_array_input_conversion()
@@ -372,6 +358,16 @@ void testing_std_array_input_conversion()
     testing_generic_array_input_conversion<std::array>();
 #endif
 
-    BOOST_CHECK(true);
+    BOOST_TEST(true);
+}
+
+int main()
+{
+    testing_boost_array_output_conversion();
+    testing_std_array_output_conversion();
+    testing_boost_array_input_conversion();
+    testing_std_array_input_conversion();
+
+    return boost::report_errors();
 }
 

test/cmake_subdir_test/CMakeLists.txt

@@ -0,0 +1,80 @@
+# Copyright  (c) 2016-2025 Antony Polukhin
+# Copyright  (c) 2025-2026 Fedor Osetrov
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
+
+cmake_minimum_required(VERSION 3.5...4.0)
+
+project(lexical_cast_subdir_test LANGUAGES CXX)
+
+set(deps
+
+# Library dependencies
+config
+container
+core
+throw_exception
+
+# Test dependencies
+algorithm
+array
+align
+assert
+atomic
+bind
+compat
+concept_check
+container_hash
+conversion
+date_time
+describe
+detail
+exception
+filesystem
+function
+function_types
+functional
+fusion
+integer
+intrusive
+io
+iterator
+move
+mp11
+mpl
+numeric/conversion
+optional
+predef
+preprocessor
+range
+regex
+scope
+smart_ptr
+static_assert
+system
+test
+tokenizer
+tuple
+type_index
+type_traits
+typeof
+unordered
+utility
+variant
+variant2
+winapi
+)
+
+foreach(dep IN LISTS deps)
+    add_subdirectory(../../../${dep} boostorg/${dep})
+endforeach()
+
+enable_testing()
+add_subdirectory(../../ boostorg/lexical_cast)
+
+if (BOOST_USE_MODULES)
+    add_executable(boost_lexical_cast_module_usage ../modules/usage_sample.cpp)
+    target_link_libraries(boost_lexical_cast_module_usage PRIVATE Boost::lexical_cast)
+    add_test(NAME boost_lexical_cast_module_usage COMMAND boost_lexical_cast_module_usage)
+endif()
+

test/containers_test.cpp

@@ -0,0 +1,77 @@
+//  Testing boost::lexical_cast with boost::container::string.
+//
+//  See http://www.boost.org for most recent version, including documentation.
+//
+//  Copyright Antony Polukhin, 2011-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+#include <boost/core/lightweight_test.hpp>
+#include <boost/container/string.hpp>
+
+#include <boost/lexical_cast.hpp>
+
+using namespace boost;
+
+void testing_boost_containers_basic_string()
+{
+    BOOST_TEST("100" == lexical_cast<boost::container::string>("100"));
+    BOOST_TEST(L"100" == lexical_cast<boost::container::wstring>(L"100"));
+
+    BOOST_TEST("100" == lexical_cast<boost::container::string>(100));
+    boost::container::string str("1000");
+    BOOST_TEST(1000 == lexical_cast<int>(str));
+}
+
+#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
+#define BOOST_LCAST_NO_WCHAR_T
+#endif
+
+void testing_boost_containers_string_std_string()
+{
+    std::string std_str("std_str");
+    boost::container::string boost_str("boost_str");
+    BOOST_TEST(boost::lexical_cast<std::string>(boost_str) == "boost_str");
+    BOOST_TEST(boost::lexical_cast<boost::container::string>(std_str) == "std_str");
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+    std::wstring std_wstr(L"std_wstr");
+    boost::container::wstring boost_wstr(L"boost_wstr");
+
+    BOOST_TEST(boost::lexical_cast<std::wstring>(boost_wstr) == L"boost_wstr");
+    BOOST_TEST(boost::lexical_cast<boost::container::wstring>(std_wstr) == L"std_wstr");
+
+#endif
+
+}
+
+void testing_boost_containers_string_widening()
+{
+    const char char_array[] = "Test string";
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+    const wchar_t wchar_array[] = L"Test string";
+    BOOST_TEST(boost::lexical_cast<boost::container::wstring>(char_array) == wchar_array);
+#endif
+
+#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && defined(BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES)
+    const char16_t char16_array[] = u"Test string";
+    BOOST_TEST(boost::lexical_cast<boost::container::basic_string<char16_t> >(char_array) == char16_array);
+#endif
+
+#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && defined(BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES)
+    const char32_t char32_array[] = U"Test string";
+    BOOST_TEST(boost::lexical_cast<boost::container::basic_string<char32_t> >(char_array) == char32_array);
+#endif
+}
+
+int main()
+{
+    testing_boost_containers_basic_string();
+    testing_boost_containers_string_std_string();
+    testing_boost_containers_string_widening();
+
+    return boost::report_errors();
+}

test/empty_input_test.cpp

@@ -0,0 +1,150 @@
+//  Unit test for boost::lexical_cast.
+//
+//  See http://www.boost.org for most recent version, including documentation.
+//
+//  Copyright Antony Polukhin, 2011-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+#include <boost/range/iterator_range.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <vector>
+
+#include <boost/lexical_cast.hpp>
+
+#include "escape_struct.hpp"
+
+using namespace boost;
+
+#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
+#define BOOST_LCAST_NO_WCHAR_T
+#endif
+
+template <class T>
+void do_test_on_empty_input(T& v)
+{
+    BOOST_TEST_THROWS(lexical_cast<int>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<float>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<double>(v), bad_lexical_cast);
+#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
+    BOOST_TEST_THROWS(lexical_cast<long double>(v), bad_lexical_cast);
+#endif
+    BOOST_TEST_THROWS(lexical_cast<unsigned int>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned short>(v), bad_lexical_cast);
+#if defined(BOOST_HAS_LONG_LONG)
+    BOOST_TEST_THROWS(lexical_cast<boost::ulong_long_type>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<boost::long_long_type>(v), bad_lexical_cast);
+#elif defined(BOOST_HAS_MS_INT64)
+    BOOST_TEST_THROWS(lexical_cast<unsigned __int64>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<__int64>(v), bad_lexical_cast);
+#endif
+}
+
+void test_empty_iterator_range()
+{
+
+    boost::iterator_range<char*> v;
+    do_test_on_empty_input(v);
+    BOOST_TEST_EQ(lexical_cast<std::string>(v), std::string());
+    BOOST_TEST_THROWS(lexical_cast<char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<signed char>(v), bad_lexical_cast);
+
+    boost::iterator_range<const char*> cv;
+    do_test_on_empty_input(cv);
+    BOOST_TEST_EQ(lexical_cast<std::string>(cv), std::string());
+    BOOST_TEST_THROWS(lexical_cast<char>(cv), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned char>(cv), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<signed char>(cv), bad_lexical_cast);
+
+    const boost::iterator_range<const char*> ccv;
+    do_test_on_empty_input(ccv);
+    BOOST_TEST_EQ(lexical_cast<std::string>(ccv), std::string());
+    BOOST_TEST_THROWS(lexical_cast<char>(ccv), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned char>(ccv), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<signed char>(ccv), bad_lexical_cast);
+}
+
+void test_empty_string()
+{
+    std::string v;
+    do_test_on_empty_input(v);
+    BOOST_TEST_THROWS(lexical_cast<char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<signed char>(v), bad_lexical_cast);
+
+#ifndef BOOST_LCAST_NO_WCHAR_T
+    std::wstring vw;
+    do_test_on_empty_input(vw);
+    BOOST_TEST_THROWS(lexical_cast<wchar_t>(vw), bad_lexical_cast);
+#endif
+
+// Currently, no compiler and STL library fully support char16_t and char32_t
+//#ifndef BOOST_NO_CXX11_CHAR16_T
+//    std::basic_string<char16_t> v16w;
+//    do_test_on_empty_input(v16w);
+//    BOOST_TEST_THROWS(lexical_cast<char16_t>(v16w), bad_lexical_cast);
+//#endif
+//#ifndef BOOST_NO_CXX11_CHAR32_T
+//    std::basic_string<char32_t> v32w;
+//    do_test_on_empty_input(v32w);
+//    BOOST_TEST_THROWS(lexical_cast<char32_t>(v32w), bad_lexical_cast);
+//#endif
+}
+
+void test_empty_user_class()
+{
+    EscapeStruct v("");
+    do_test_on_empty_input(v);
+    BOOST_TEST_THROWS(lexical_cast<char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<signed char>(v), bad_lexical_cast);
+}
+
+namespace std {
+inline std::ostream & operator<<(std::ostream & out, const std::vector<long> & v)
+{
+    std::ostream_iterator<long> it(out);
+    std::copy(v.begin(), v.end(), it);
+    BOOST_TEST(out);
+    return out;
+}
+}
+
+void test_empty_vector()
+{
+    std::vector<long> v;
+    do_test_on_empty_input(v);
+    BOOST_TEST_THROWS(lexical_cast<char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<signed char>(v), bad_lexical_cast);
+}
+
+
+struct my_string {
+    friend std::ostream &operator<<(std::ostream& sout, my_string const&/* st*/) {
+            return sout << "";
+    }
+};
+
+void test_empty_zero_terminated_string()
+{
+    my_string st;
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(st), std::string());;
+}
+
+
+int main()
+{
+    test_empty_iterator_range();
+    test_empty_string();
+    test_empty_user_class();
+    test_empty_vector();
+    test_empty_zero_terminated_string();
+
+    return boost::report_errors();
+}

test/escape_struct.hpp

@@ -0,0 +1,36 @@
+//  See http://www.boost.org for most recent version, including documentation.
+//
+//  Copyright Antony Polukhin, 2020-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+#ifndef BOOST_LEXICAL_CAST_TEST_ESCAPE_STRUCT_HPP_
+#define BOOST_LEXICAL_CAST_TEST_ESCAPE_STRUCT_HPP_
+
+#include <istream>
+#include <ostream>
+
+struct EscapeStruct
+{
+    EscapeStruct() {}
+    EscapeStruct(const std::string& s)
+        : str_(s)
+    {}
+
+    std::string str_;
+};
+
+inline std::ostream& operator<< (std::ostream& o, const EscapeStruct& rhs)
+{
+    return o << rhs.str_;
+}
+
+inline std::istream& operator>> (std::istream& i, EscapeStruct& rhs)
+{
+    return i >> rhs.str_;
+}
+
+
+#endif // BOOST_LEXICAL_CAST_TEST_ESCAPE_STRUCT_HPP_

test/filesystem_test.cpp

@@ -0,0 +1,60 @@
+//  Unit test for boost::lexical_cast.
+//
+//  See http://www.boost.org for most recent version, including documentation.
+//
+//  Copyright Antony Polukhin, 2013-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+//
+// Test lexical_cast usage with long filesystem::path. Bug 7704.
+
+#include <boost/core/lightweight_test.hpp>
+#include <boost/filesystem/path.hpp>
+
+#include <boost/lexical_cast.hpp>
+
+void test_filesystem()
+{
+    boost::filesystem::path p;
+    std::string s1 = "aaaaaaaaaaaaaaaaaaaaaaa";
+    p = boost::lexical_cast<boost::filesystem::path>(s1);
+    BOOST_TEST(!p.empty());
+    BOOST_TEST_EQ(p, s1);
+    p.clear();
+
+    const char ab[] = "aaaaaaaaaaaaaaaaaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb";
+    p = boost::lexical_cast<boost::filesystem::path>(ab);
+    BOOST_TEST(!p.empty());
+    BOOST_TEST_EQ(p, ab);
+
+    // Tests for
+    // https://github.com/boostorg/lexical_cast/issues/25
+
+    const char quoted_path[] = "\"/home/my user\"";
+    p = boost::lexical_cast<boost::filesystem::path>(quoted_path);
+    BOOST_TEST(!p.empty());
+    const char unquoted_path[] = "/home/my user";
+    BOOST_TEST_EQ(p, boost::filesystem::path(unquoted_path));
+
+    // Converting back to std::string gives the initial string
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(p), quoted_path);
+
+    try {
+        // Without quotes the path will have only `/home/my` in it.
+        // `user` remains in the stream, so an exception must be thrown.
+        p = boost::lexical_cast<boost::filesystem::path>(unquoted_path);
+        BOOST_TEST(false);
+    } catch (const boost::bad_lexical_cast& ) {
+        // Exception is expected
+    }
+}
+
+int main()
+{
+    test_filesystem();
+
+    return boost::report_errors();
+}
+

test/float_types_test.cpp

@@ -0,0 +1,604 @@
+//  Unit test for boost::lexical_cast.
+//
+//  See http://www.boost.org for most recent version, including documentation.
+//
+//  Copyright Antony Polukhin, 2011-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+#include <sstream>
+#include <type_traits>
+
+#include <boost/cstdint.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#ifndef BOOST_LEXICAL_CAST_DETAIL_TEST_ON_OLD
+#include <boost/lexical_cast/detail/type_traits.hpp>
+#include <boost/lexical_cast.hpp>
+#else
+// Make sure that tests work the same way on non-optimized version
+#include "lexical_cast_old.hpp"
+#include <boost/lexical_cast/detail/type_traits.hpp>
+#endif
+
+
+#ifndef BOOST_TEST_CLOSE_FRACTION
+// Naiive, but works for most tests in this file 
+#define BOOST_TEST_CLOSE_FRACTION(x, y, eps) \
+    BOOST_TEST(x - y + eps <= eps * 2); \
+    BOOST_TEST(y - x + eps <= eps * 2);
+#endif
+
+#if (defined(__CYGWIN__) || defined(__FreeBSD__) || defined(__NetBSD__) \
+   || (defined(__hppa) && !defined(__OpenBSD__)) || (defined(__NO_LONG_DOUBLE_MATH) && (DBL_MANT_DIG != LDBL_MANT_DIG))) \
+   || defined(__MINGW64__)
+#  define BOOST_LEXICAL_CAST_NO_LONG_DOUBLE_MATH_FUNCTIONS
+#endif
+
+using namespace boost;
+
+
+// Replace "-,999" with "-999".
+template<class CharT>
+std::basic_string<CharT> to_str_gcc_workaround(std::basic_string<CharT> str)
+{
+    std::locale loc;
+    std::numpunct<CharT> const& np = BOOST_USE_FACET(std::numpunct<CharT>, loc);
+    std::ctype<CharT> const& ct = BOOST_USE_FACET(std::ctype<CharT>, loc);
+
+    if(np.grouping().empty())
+        return str;
+
+    CharT prefix[3] = { ct.widen('-'), np.thousands_sep(), CharT() };
+
+    if(str.find(prefix) != 0)
+        return str;
+
+    prefix[1] = CharT();
+    str.replace(0, 2, prefix);
+    return str;
+}
+
+template<class CharT, class T>
+std::basic_string<CharT> to_str(T t)
+{
+    std::basic_ostringstream<CharT> o;
+    o << t;
+    return to_str_gcc_workaround(o.str());
+}
+
+
+template<class T>
+void test_conversion_from_to_float_for_locale()
+{
+    std::locale current_locale;
+    typedef std::numpunct<char> numpunct;
+    numpunct const& np = BOOST_USE_FACET(numpunct, current_locale);
+    if ( !np.grouping().empty() )
+    {
+        BOOST_TEST_THROWS(
+                lexical_cast<T>( std::string("100") + np.thousands_sep() + np.thousands_sep() + "0" )
+                , bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>( std::string("100") + np.thousands_sep() ), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>( np.thousands_sep() + std::string("100") ), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>( std::string("1") + np.thousands_sep() + np.decimal_point() + "e10" ), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>( std::string("1e10") + np.thousands_sep() ), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>( std::string("1") + np.thousands_sep() + "e10" ), bad_lexical_cast);
+
+        BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( to_str< char >(100000) ), 100000, (std::numeric_limits<T>::epsilon()) );
+        BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( to_str< char >(10000000u) ), 10000000u, (std::numeric_limits<T>::epsilon()) );
+        BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( to_str< char >(100) ), 100, (std::numeric_limits<T>::epsilon()) );
+#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
+        BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( to_str< wchar_t >(100000) ), 100000, (std::numeric_limits<T>::epsilon()) );
+        BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( to_str< wchar_t >(10000000u) ), 10000000u, (std::numeric_limits<T>::epsilon()) );
+        BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( to_str< wchar_t >(100) ), 100, (std::numeric_limits<T>::epsilon()) );
+#endif
+        // Exception must not be thrown, when we are using no separators at all
+        BOOST_TEST_CLOSE_FRACTION( lexical_cast<T>("30000"), static_cast<T>(30000), (std::numeric_limits<T>::epsilon()) );
+    }
+}
+
+
+
+
+/*
+ * Converts char* [and wchar_t*] to float number type and checks, that generated
+ * number does not exceeds allowed epsilon.
+ */
+#ifndef BOOST_LCAST_NO_WCHAR_T
+#define CHECK_CLOSE_ABS_DIFF(VAL,PREFIX)                                                          \
+    converted_val = lexical_cast<test_t>(#VAL);                                                   \
+    BOOST_TEST_CLOSE_FRACTION( (static_cast<bool>(VAL ## L)? VAL ## L : std::numeric_limits<test_t>::epsilon()), \
+                       (converted_val ? converted_val : std::numeric_limits<test_t>::epsilon()),  \
+                       std::numeric_limits<test_t>::epsilon()                                     \
+                     );                                                                           \
+    BOOST_TEST_EQ(converted_val, lexical_cast<test_t>(L## #VAL) );
+
+#else
+#define CHECK_CLOSE_ABS_DIFF(VAL,TYPE)                                                            \
+    converted_val = lexical_cast<test_t>(#VAL);                                                   \
+    BOOST_TEST_CLOSE_FRACTION( (static_cast<bool>(VAL ## L)? VAL ## L : std::numeric_limits<test_t>::epsilon()), \
+                       (converted_val ? converted_val : std::numeric_limits<test_t>::epsilon()),  \
+                       std::numeric_limits<test_t>::epsilon()                                     \
+                     );
+#endif
+
+template <class TestType>
+void test_converion_to_float_types()
+{
+    typedef TestType test_t;
+    test_t converted_val;
+
+    BOOST_TEST_CLOSE_FRACTION(1.0, lexical_cast<test_t>('1'), (std::numeric_limits<test_t>::epsilon()));
+    BOOST_TEST_EQ(0.0, lexical_cast<test_t>('0'));
+
+    unsigned char const uc_one = '1';
+    unsigned char const uc_zero ='0';
+    BOOST_TEST_CLOSE_FRACTION(1.0, lexical_cast<test_t>(uc_one), (std::numeric_limits<test_t>::epsilon()));
+    BOOST_TEST_EQ(0.0, lexical_cast<test_t>(uc_zero));
+
+    signed char const sc_one = '1';
+    signed char const sc_zero ='0';
+    BOOST_TEST_CLOSE_FRACTION(1.0, lexical_cast<test_t>(sc_one), (std::numeric_limits<test_t>::epsilon()));
+    BOOST_TEST_EQ(0.0, lexical_cast<test_t>(sc_zero));
+
+    BOOST_TEST_CLOSE_FRACTION(1e34L, lexical_cast<test_t>( "10000000000000000000000000000000000"), (std::numeric_limits<test_t>::epsilon() * 1e34L) );
+
+//    VC failes the next test
+//    BOOST_TEST_CLOSE_FRACTION(1e-35L, lexical_cast<test_t>("0.00000000000000000000000000000000001"), (std::numeric_limits<test_t>::epsilon()) );
+    BOOST_TEST_CLOSE_FRACTION(
+                                    0.1111111111111111111111111111111111111111111111111111111111111111111111111L
+            , lexical_cast<test_t>("0.1111111111111111111111111111111111111111111111111111111111111111111111111")
+            , (std::numeric_limits<test_t>::epsilon()) );
+
+    CHECK_CLOSE_ABS_DIFF(1,test_t);
+    BOOST_TEST_EQ(0,lexical_cast<test_t>("0"));
+    CHECK_CLOSE_ABS_DIFF(-1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(1.0, test_t);
+    CHECK_CLOSE_ABS_DIFF(0.0, test_t);
+    CHECK_CLOSE_ABS_DIFF(-1.0,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(1e1, test_t);
+    CHECK_CLOSE_ABS_DIFF(0e1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-1e1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(1.0e1, test_t);
+    CHECK_CLOSE_ABS_DIFF(0.0e1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-1.0e1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(1e-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(0e-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-1e-1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(1.0e-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(0.0e-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-1.0e-1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(1E1, test_t);
+    CHECK_CLOSE_ABS_DIFF(0E1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-1E1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(1.0E1, test_t);
+    CHECK_CLOSE_ABS_DIFF(0.0E1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-1.0E1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(1E-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(0E-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-1E-1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(1.0E-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(0.0E-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-1.0E-1, test_t);
+
+    CHECK_CLOSE_ABS_DIFF(.0E-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(.0E-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-.0E-1, test_t);
+
+    CHECK_CLOSE_ABS_DIFF(10.0, test_t);
+    CHECK_CLOSE_ABS_DIFF(00.0, test_t);
+    CHECK_CLOSE_ABS_DIFF(-10.0,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(10e1, test_t);
+    CHECK_CLOSE_ABS_DIFF(00e1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-10e1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(10.0e1, test_t);
+    CHECK_CLOSE_ABS_DIFF(00.0e1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-10.0e1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(10e-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(00e-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-10e-1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(10.0e-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(00.0e-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-10.0e-1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(10E1, test_t);
+    CHECK_CLOSE_ABS_DIFF(00E1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-10E1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(10.0E1, test_t);
+    CHECK_CLOSE_ABS_DIFF(00.0E1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-10.0E1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(10E-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(00E-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-10E-1,test_t);
+
+    CHECK_CLOSE_ABS_DIFF(10.0E-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(00.0E-1, test_t);
+    CHECK_CLOSE_ABS_DIFF(-10.0E-1, test_t);
+
+    CHECK_CLOSE_ABS_DIFF(-10101.0E-011, test_t);
+    CHECK_CLOSE_ABS_DIFF(-10101093, test_t);
+    CHECK_CLOSE_ABS_DIFF(10101093, test_t);
+
+    CHECK_CLOSE_ABS_DIFF(-.34, test_t);
+    CHECK_CLOSE_ABS_DIFF(.34, test_t);
+    CHECK_CLOSE_ABS_DIFF(.34e10, test_t);
+
+    BOOST_TEST_THROWS(lexical_cast<test_t>("-1.e"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("-1.E"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("1.e"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("1.E"), bad_lexical_cast);
+
+    BOOST_TEST_THROWS(lexical_cast<test_t>("1.0e"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("1.0E"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("10E"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("10e"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("1.0e-"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("1.0E-"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("10E-"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("10e-"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("e1"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("e-1"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("e-"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>(".e"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>(".11111111111111111111111111111111111111111111111111111111111111111111ee"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>(".11111111111111111111111111111111111111111111111111111111111111111111e-"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("."), bad_lexical_cast);
+
+    BOOST_TEST_THROWS(lexical_cast<test_t>("-B"), bad_lexical_cast);
+
+    // Following two tests are not valid for C++11 compilers
+    //BOOST_TEST_THROWS(lexical_cast<test_t>("0xB"), bad_lexical_cast);
+    //BOOST_TEST_THROWS(lexical_cast<test_t>("0x0"), bad_lexical_cast);
+
+    BOOST_TEST_THROWS(lexical_cast<test_t>("--1.0"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("1.0e--1"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("1.0.0"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("1e1e1"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("1.0e-1e-1"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>(" 1.0"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("1.0 "), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>(""), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("-"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>('\0'), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>('-'), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>('.'), bad_lexical_cast);
+}
+
+template <class T>
+void test_float_typess_for_overflows()
+{
+    typedef T test_t;
+    test_t minvalue = (std::numeric_limits<test_t>::min)();
+    std::string s_min_value = lexical_cast<std::string>(minvalue);
+    BOOST_TEST_CLOSE_FRACTION(minvalue, lexical_cast<test_t>(minvalue), (std::numeric_limits<test_t>::epsilon()));
+    BOOST_TEST_CLOSE_FRACTION(minvalue, lexical_cast<test_t>(s_min_value), (std::numeric_limits<test_t>::epsilon() * 2));
+
+    test_t maxvalue = (std::numeric_limits<test_t>::max)();
+    std::string s_max_value = lexical_cast<std::string>(maxvalue);
+    BOOST_TEST_CLOSE_FRACTION(maxvalue, lexical_cast<test_t>(maxvalue), (std::numeric_limits<test_t>::epsilon()));
+    BOOST_TEST_CLOSE_FRACTION(maxvalue, lexical_cast<test_t>(s_max_value), (std::numeric_limits<test_t>::epsilon()));
+
+#ifndef _LIBCPP_VERSION
+    // libc++ had a bug in implementation of stream conversions for values that must be represented as infinity.
+    // http://llvm.org/bugs/show_bug.cgi?id=15723#c4
+    BOOST_TEST_THROWS(lexical_cast<test_t>(s_max_value+"1"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>(s_max_value+"9"), bad_lexical_cast);
+
+    // VC9 can fail the following tests on floats and doubles when using stingstream...
+    BOOST_TEST_THROWS(lexical_cast<test_t>("1"+s_max_value), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<test_t>("9"+s_max_value), bad_lexical_cast);
+#endif
+#if !(defined(_LIBCPP_VERSION) && defined(BOOST_LEXICAL_CAST_DETAIL_TEST_ON_OLD))
+    if ( std::is_same<test_t,float>::value )
+    {
+        BOOST_TEST_THROWS(lexical_cast<test_t>( (std::numeric_limits<double>::max)() ), bad_lexical_cast);
+        BOOST_TEST(
+                (std::numeric_limits<double>::min)() - std::numeric_limits<test_t>::epsilon()
+                <= lexical_cast<test_t>( (std::numeric_limits<double>::min)() )
+                && lexical_cast<test_t>( (std::numeric_limits<double>::min)() )
+                <= (std::numeric_limits<double>::min)() + std::numeric_limits<test_t>::epsilon()
+        );
+
+        BOOST_TEST(
+                (std::numeric_limits<double>::min)() / 2 - std::numeric_limits<test_t>::epsilon()
+                <= lexical_cast<test_t>( (std::numeric_limits<double>::min)() / 2 )
+                && lexical_cast<test_t>( (std::numeric_limits<double>::min)() / 2 )
+                <= (std::numeric_limits<double>::min)() / 2 + std::numeric_limits<test_t>::epsilon()
+        );
+    }
+
+    if ( sizeof(test_t) < sizeof(long double) )
+    {
+        BOOST_TEST_THROWS(lexical_cast<test_t>( (std::numeric_limits<long double>::max)() ), bad_lexical_cast);
+        BOOST_TEST(
+                (std::numeric_limits<long double>::min)() - std::numeric_limits<test_t>::epsilon()
+                <= lexical_cast<test_t>( (std::numeric_limits<long double>::min)() )
+                && lexical_cast<test_t>( (std::numeric_limits<long double>::min)() )
+                <= (std::numeric_limits<long double>::min)() + std::numeric_limits<test_t>::epsilon()
+        );
+
+        BOOST_TEST(
+                (std::numeric_limits<long double>::min)() / 2 - std::numeric_limits<test_t>::epsilon()
+                <= lexical_cast<test_t>( (std::numeric_limits<long double>::min)() / 2 )
+                && lexical_cast<test_t>( (std::numeric_limits<long double>::min)() / 2 )
+                <= (std::numeric_limits<long double>::min)() / 2 + std::numeric_limits<test_t>::epsilon()
+        );
+    }
+#endif
+}
+
+#undef CHECK_CLOSE_ABS_DIFF
+
+// Epsilon is multiplied by 2 because of two lexical conversions
+#define TEST_TO_FROM_CAST_AROUND_TYPED(VAL,STRING_TYPE)                             \
+    test_value = VAL + std::numeric_limits<test_t>::epsilon() * i ;                 \
+    converted_val = lexical_cast<test_t>( lexical_cast<STRING_TYPE>(test_value) );  \
+    BOOST_TEST_CLOSE_FRACTION(                                                     \
+            test_value,                                                             \
+            converted_val,                                                          \
+            std::numeric_limits<test_t>::epsilon() * 2                              \
+        );
+
+/*
+ * For interval [ from_mult*epsilon+VAL, to_mult*epsilon+VAL ], converts float type
+ * numbers to string[wstring] and then back to float type, then compares initial
+ * values and generated.
+ * Step is epsilon
+ */
+#ifndef BOOST_LCAST_NO_WCHAR_T
+#   define TEST_TO_FROM_CAST_AROUND(VAL)                    \
+    for(i=from_mult; i<=to_mult; ++i) {                     \
+        TEST_TO_FROM_CAST_AROUND_TYPED(VAL, std::string)    \
+        TEST_TO_FROM_CAST_AROUND_TYPED(VAL, std::wstring)   \
+    }
+#else
+#   define TEST_TO_FROM_CAST_AROUND(VAL)                    \
+    for(i=from_mult; i<=to_mult; ++i) {                     \
+        TEST_TO_FROM_CAST_AROUND_TYPED(VAL, std::string)    \
+    }
+#endif
+
+template <class TestType>
+void test_converion_from_to_float_types()
+{
+    typedef TestType test_t;
+    test_t test_value;
+    test_t converted_val;
+
+    int i;
+    int from_mult = -50;
+    int to_mult = 50;
+
+    TEST_TO_FROM_CAST_AROUND( 0.0 );
+
+    long double val1;
+    for(val1 = 1.0e-10L; val1 < 1e11; val1*=10 )
+        TEST_TO_FROM_CAST_AROUND( val1 );
+
+    long double val2;
+    for(val2 = -1.0e-10L; val2 > -1e11; val2*=10 )
+        TEST_TO_FROM_CAST_AROUND( val2 );
+
+    from_mult = -100;
+    to_mult = 0;
+    TEST_TO_FROM_CAST_AROUND( (std::numeric_limits<test_t>::max)() );
+
+    from_mult = 0;
+    to_mult = 100;
+    TEST_TO_FROM_CAST_AROUND( (std::numeric_limits<test_t>::min)() );
+}
+
+#undef TEST_TO_FROM_CAST_AROUND
+#undef TEST_TO_FROM_CAST_AROUND_TYPED
+
+
+template<class T, class CharT>
+void test_conversion_from_float_to_char(CharT zero)
+{
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(0)) == zero + 0);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(1)) == zero + 1);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(2)) == zero + 2);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(3)) == zero + 3);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(4)) == zero + 4);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(5)) == zero + 5);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(6)) == zero + 6);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(7)) == zero + 7);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(8)) == zero + 8);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(9)) == zero + 9);
+
+    BOOST_TEST_THROWS(lexical_cast<CharT>(static_cast<T>(10)), bad_lexical_cast);
+
+    T t = (std::numeric_limits<T>::max)();
+    BOOST_TEST_THROWS(lexical_cast<CharT>(t), bad_lexical_cast);
+}
+
+template<class T, class CharT>
+void test_conversion_from_char_to_float(CharT zero)
+{
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 0)), static_cast<T>(0), (std::numeric_limits<T>::epsilon()) );
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 1)), static_cast<T>(1), (std::numeric_limits<T>::epsilon()) );
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 2)), static_cast<T>(2), (std::numeric_limits<T>::epsilon()) );
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 3)), static_cast<T>(3), (std::numeric_limits<T>::epsilon()) );
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 4)), static_cast<T>(4), (std::numeric_limits<T>::epsilon()) );
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 5)), static_cast<T>(5), (std::numeric_limits<T>::epsilon()) );
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 6)), static_cast<T>(6), (std::numeric_limits<T>::epsilon()) );
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 7)), static_cast<T>(7), (std::numeric_limits<T>::epsilon()) );
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 8)), static_cast<T>(8), (std::numeric_limits<T>::epsilon()) );
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 9)), static_cast<T>(9), (std::numeric_limits<T>::epsilon()) );
+
+    BOOST_TEST_THROWS(lexical_cast<T>( static_cast<CharT>(zero + 10)), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>( static_cast<CharT>(zero - 1)), bad_lexical_cast);
+}
+
+struct restore_oldloc
+{
+    std::locale oldloc;
+    ~restore_oldloc() { std::locale::global(oldloc); }
+};
+
+template<class T>
+void test_conversion_from_to_float()
+{    char const zero = '0';
+    signed char const szero = '0';
+    unsigned char const uzero = '0';
+    test_conversion_from_float_to_char<T>(zero);
+    test_conversion_from_char_to_float<T>(zero);
+    test_conversion_from_float_to_char<T>(szero);
+    test_conversion_from_char_to_float<T>(szero);
+    test_conversion_from_float_to_char<T>(uzero);
+    test_conversion_from_char_to_float<T>(uzero);
+    #if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
+    wchar_t const wzero = L'0';
+    test_conversion_from_float_to_char<T>(wzero);
+    test_conversion_from_char_to_float<T>(wzero);
+    #endif
+
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>("+1"), 1, std::numeric_limits<T>::epsilon());
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<T>("+9"), 9, std::numeric_limits<T>::epsilon());
+
+    BOOST_TEST_THROWS(lexical_cast<T>("++1"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>("-+9"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>("--1"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>("+-9"), bad_lexical_cast);
+
+    test_converion_to_float_types<T>();
+    test_float_typess_for_overflows<T>();
+    test_converion_from_to_float_types<T>();
+
+
+    typedef std::numpunct<char> numpunct;
+
+    restore_oldloc guard;
+    std::locale const& oldloc = guard.oldloc;
+
+    std::string grouping1 = BOOST_USE_FACET(numpunct, oldloc).grouping();
+    std::string grouping2(grouping1);
+
+    test_conversion_from_to_float_for_locale<T>();
+
+    try
+    {
+        std::locale newloc("");
+        std::locale::global(newloc);
+
+        grouping2 = BOOST_USE_FACET(numpunct, newloc).grouping();
+    }
+    catch(std::exception const& ex)
+    {
+        std::string msg("Failed to set system locale: ");
+        msg += ex.what();
+        std::cerr << msg;
+    }
+
+    if(grouping1 != grouping2)
+        test_conversion_from_to_float_for_locale<T>();
+
+    if(grouping1.empty() && grouping2.empty())
+        std::cerr << "Formatting with thousands_sep has not been tested";
+}
+
+
+
+void test_conversion_from_to_float()
+{
+    test_conversion_from_to_float<float>();
+}
+void test_conversion_from_to_double()
+{
+    test_conversion_from_to_float<double>();
+}
+void test_conversion_from_to_long_double()
+{
+// We do not run tests on compilers and Standard Libraries with poor support of long double
+#if !defined(BOOST_LEXICAL_CAST_NO_LONG_DOUBLE_MATH_FUNCTIONS)
+    test_conversion_from_to_float<long double>();
+#endif
+    BOOST_TEST(true);
+}
+
+template <class Integral, class Float>
+void test_conversion_integral_float()
+{
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<Float>(static_cast<Float>(1)), static_cast<Float>(1), std::numeric_limits<Float>::epsilon());
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<Float>(static_cast<Float>(1.1234)), static_cast<Float>(1.1234), std::numeric_limits<Float>::epsilon());
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<Float>(static_cast<Float>(-1.1234)), static_cast<Float>(-1.1234), std::numeric_limits<Float>::epsilon());
+
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<Float>(static_cast<Integral>(0)), static_cast<Float>(0), std::numeric_limits<Float>::epsilon());
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<Float>(static_cast<Integral>(1)), static_cast<Float>(1), std::numeric_limits<Float>::epsilon());
+
+#ifndef __CYGWIN__
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<Float>((std::numeric_limits<Integral>::max)()), static_cast<Float>((std::numeric_limits<Integral>::max)()), std::numeric_limits<Float>::epsilon());
+    BOOST_TEST_CLOSE_FRACTION(lexical_cast<Float>((std::numeric_limits<Integral>::min)()), static_cast<Float>((std::numeric_limits<Integral>::min)()), std::numeric_limits<Float>::epsilon());
+#endif
+
+    BOOST_TEST_EQ(lexical_cast<Integral>(static_cast<Float>(0.0)), 0);
+    BOOST_TEST_EQ(lexical_cast<Integral>(static_cast<Float>(1.0)), 1);
+    BOOST_TEST_EQ(lexical_cast<Integral>(static_cast<Float>(8.0)), 8);
+    BOOST_TEST_EQ(lexical_cast<Integral>(static_cast<Float>(16.0)), 16);
+
+    if (boost::detail::lcast::is_signed<Integral>::value) {
+        BOOST_TEST_EQ(lexical_cast<Integral>(static_cast<Float>(-1.0)), -1);
+        BOOST_TEST_EQ(lexical_cast<Integral>(static_cast<Float>(-8.0)), -8);
+        BOOST_TEST_EQ(lexical_cast<Integral>(static_cast<Float>(-16.0)), -16);
+    } else {
+        BOOST_TEST_EQ(lexical_cast<Integral>(static_cast<Float>(-1.0)), (std::numeric_limits<Integral>::max)());
+        BOOST_TEST_EQ(lexical_cast<Integral>(static_cast<Float>(-8.0)), (std::numeric_limits<Integral>::max)() - 7);
+        BOOST_TEST_EQ(lexical_cast<Integral>(static_cast<Float>(-16.0)), (std::numeric_limits<Integral>::max)() - 15);
+    }
+
+    BOOST_TEST_THROWS(lexical_cast<Integral>(static_cast<Float>(0.5)), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(static_cast<Float>(-0.5)), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(static_cast<Float>(1.5)), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(static_cast<Float>(-1.5)), bad_lexical_cast);
+
+    BOOST_TEST_THROWS(lexical_cast<Integral>((std::numeric_limits<Float>::min)()), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>((std::numeric_limits<Float>::max)()), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>((std::numeric_limits<Float>::epsilon)()), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>((std::numeric_limits<Float>::lowest)()), bad_lexical_cast);
+
+    BOOST_TEST_THROWS(lexical_cast<Integral>(std::numeric_limits<Float>::quiet_NaN()), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(-std::numeric_limits<Float>::quiet_NaN()), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(std::numeric_limits<Float>::infinity()), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(-std::numeric_limits<Float>::infinity()), bad_lexical_cast);
+}
+
+
+int main()
+{
+    test_conversion_from_to_float();
+    test_conversion_from_to_double();
+    test_conversion_from_to_long_double();
+
+    test_conversion_integral_float<int, float>();
+    test_conversion_integral_float<int, double>();
+    test_conversion_integral_float<unsigned short, float>();
+    test_conversion_integral_float<unsigned short, double>();
+    test_conversion_integral_float<short, float>();
+    test_conversion_integral_float<short, double>();
+    test_conversion_integral_float<long int, float>();
+    test_conversion_integral_float<long int, double>();
+    test_conversion_integral_float<long long, float>();
+    test_conversion_integral_float<long long, double>();
+    test_conversion_integral_float<unsigned long long, float>();
+    test_conversion_integral_float<unsigned long long, double>();
+
+    return boost::report_errors();
+}

test/from_volatile.cpp

@@ -0,0 +1,16 @@
+//  Copyright Antony Polukhin, 2013-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+#include <boost/lexical_cast.hpp>
+#include <string>
+
+int main()
+{
+    volatile int i = 42;
+    boost::lexical_cast<std::string>(i);
+    return 1;
+}
+

test/implicit_convert.cpp

@@ -0,0 +1,63 @@
+//  Copyright Antony Polukhin, 2023-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <boost/lexical_cast.hpp>
+
+struct oops {
+    operator int () const {
+        return 41;
+    }
+};
+
+inline std::ostream& operator<<(std::ostream& os, const oops&) {
+    return os << 42;
+}
+
+struct oops2 {
+    operator double () const {
+        return 1.12;
+    }
+};
+
+inline std::ostream& operator<<(std::ostream& os, const oops2&) {
+    return os << 2;
+}
+
+struct Value {
+    explicit Value(double x) : x(x) {}
+
+    operator double() const {
+        return x;
+    }
+
+    double x;
+};
+
+int main() {
+    BOOST_TEST_EQ(boost::lexical_cast<int>(oops{}), 42);
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(oops{}), "42");
+
+    BOOST_TEST_EQ(boost::lexical_cast<double>(oops2{}), 2);
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(oops2{}), "2");
+
+    Value longer_that_1_digit(128);
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(longer_that_1_digit), "128");
+
+    // iostreams have default precision 6, see [basic.ios.cons]
+    const double precision_more_than_6_digits = 1.23456789123;
+    // At the moment we do not set the precision for types that use conversion
+    // operators for ostreaming, so the below test pass. We do not set precision
+    // for user provided `operator<<`, types with conversion operators follow
+    // the same design decision for now.
+    BOOST_TEST_NE(
+        boost::lexical_cast<std::string>(Value(precision_more_than_6_digits)),
+        boost::lexical_cast<std::string>(precision_more_than_6_digits)
+    );
+
+    return boost::report_errors();
+}

test/inf_nan_test.cpp

@@ -0,0 +1,242 @@
+//  Unit test for boost::lexical_cast.
+//
+//  See http://www.boost.org for most recent version, including documentation.
+//
+//  Copyright Antony Polukhin, 2011-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+#include <type_traits>
+
+#include <boost/core/cmath.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <boost/lexical_cast.hpp>
+
+#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
+#define BOOST_LCAST_NO_WCHAR_T
+#endif
+
+using namespace boost;
+
+template <class T>
+bool is_pos_inf(T value)
+{
+    return (boost::core::isinf)(value) && !(boost::core::signbit)(value);
+}
+
+template <class T>
+bool is_neg_inf(T value)
+{
+    return (boost::core::isinf)(value) && (boost::core::signbit)(value);
+}
+
+template <class T>
+bool is_pos_nan(T value)
+{
+    return (boost::core::isnan)(value) && !(boost::core::signbit)(value);
+}
+
+template <class T>
+bool is_neg_nan(T value)
+{
+    /* There is some strange behaviour on Itanium platform with -nan nuber for long double.
+    * It is a IA64 feature, or it is a boost::math feature, not a lexical_cast bug */
+#if defined(__ia64__) || defined(_M_IA64)
+    return (boost::core::isnan)(value)
+            && ( std::is_same<T, long double >::value || (boost::core::signbit)(value) );
+#else
+    return (boost::core::isnan)(value) && (boost::core::signbit)(value);
+#endif
+}
+
+template <class T>
+void test_inf_nan_templated()
+{
+    typedef T test_t;
+
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>("inf") ) );
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>("INF") ) );
+
+    BOOST_TEST( is_neg_inf( lexical_cast<test_t>("-inf") ) );
+    BOOST_TEST( is_neg_inf( lexical_cast<test_t>("-INF") ) );
+
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>("+inf") ) );
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>("+INF") ) );
+
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>("infinity") ) );
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>("INFINITY") ) );
+
+    BOOST_TEST( is_neg_inf( lexical_cast<test_t>("-infinity") ) );
+    BOOST_TEST( is_neg_inf( lexical_cast<test_t>("-INFINITY") ) );
+
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>("+infinity") ) );
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>("+INFINITY") ) );
+
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>("iNfiNity") ) );
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>("INfinity") ) );
+
+    BOOST_TEST( is_neg_inf( lexical_cast<test_t>("-inFINITY") ) );
+    BOOST_TEST( is_neg_inf( lexical_cast<test_t>("-INFINITY") ) );
+
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>("nan") ) );
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>("NAN") ) );
+
+    BOOST_TEST( is_neg_nan( lexical_cast<test_t>("-nan") ) );
+    BOOST_TEST( is_neg_nan( lexical_cast<test_t>("-NAN") ) );
+
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>("+nan") ) );
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>("+NAN") ) );
+
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>("nAn") ) );
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>("NaN") ) );
+
+    BOOST_TEST( is_neg_nan( lexical_cast<test_t>("-nAn") ) );
+    BOOST_TEST( is_neg_nan( lexical_cast<test_t>("-NaN") ) );
+
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>("+Nan") ) );
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>("+nAN") ) );
+
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>("nan()") ) );
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>("NAN(some string)") ) );
+    BOOST_TEST_THROWS( lexical_cast<test_t>("NAN(some string"), bad_lexical_cast );
+
+    BOOST_TEST(lexical_cast<std::string>( (boost::core::copysign)(std::numeric_limits<test_t >::infinity(), static_cast<test_t>(-1.0)))
+                == "-inf" );
+    BOOST_TEST(lexical_cast<std::string>( std::numeric_limits<test_t >::infinity()) == "inf" );
+    BOOST_TEST(lexical_cast<std::string>( std::numeric_limits<test_t >::quiet_NaN()) == "nan" );
+#if !defined(__ia64__) && !defined(_M_IA64)
+    BOOST_TEST(lexical_cast<std::string>(
+                (boost::core::copysign)(std::numeric_limits<test_t >::quiet_NaN(), static_cast<test_t>(-1.0)))
+                == "-nan" );
+#endif
+
+#ifndef  BOOST_LCAST_NO_WCHAR_T
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>(L"inf") ) );
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>(L"INF") ) );
+
+    BOOST_TEST( is_neg_inf( lexical_cast<test_t>(L"-inf") ) );
+    BOOST_TEST( is_neg_inf( lexical_cast<test_t>(L"-INF") ) );
+
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>(L"+inf") ) );
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>(L"+INF") ) );
+
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>(L"infinity") ) );
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>(L"INFINITY") ) );
+
+    BOOST_TEST( is_neg_inf( lexical_cast<test_t>(L"-infinity") ) );
+    BOOST_TEST( is_neg_inf( lexical_cast<test_t>(L"-INFINITY") ) );
+
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>(L"+infinity") ) );
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>(L"+INFINITY") ) );
+
+    BOOST_TEST( is_neg_inf( lexical_cast<test_t>(L"-infINIty") ) );
+    BOOST_TEST( is_neg_inf( lexical_cast<test_t>(L"-INFiniTY") ) );
+
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>(L"+inFINIty") ) );
+    BOOST_TEST( is_pos_inf( lexical_cast<test_t>(L"+INfinITY") ) );
+
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>(L"nan") ) );
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>(L"NAN") ) );
+
+    BOOST_TEST( is_neg_nan( lexical_cast<test_t>(L"-nan") ) );
+    BOOST_TEST( is_neg_nan( lexical_cast<test_t>(L"-NAN") ) );
+
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>(L"+nan") ) );
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>(L"+NAN") ) );
+
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>(L"nan()") ) );
+    BOOST_TEST( is_pos_nan( lexical_cast<test_t>(L"NAN(some string)") ) );
+    BOOST_TEST_THROWS( lexical_cast<test_t>(L"NAN(some string"), bad_lexical_cast );
+
+    BOOST_TEST(lexical_cast<std::wstring>( (boost::core::copysign)(std::numeric_limits<test_t >::infinity(), static_cast<test_t>(-1.0)))
+                == L"-inf" );
+    BOOST_TEST(lexical_cast<std::wstring>( std::numeric_limits<test_t >::infinity()) == L"inf" );
+    BOOST_TEST(lexical_cast<std::wstring>( std::numeric_limits<test_t >::quiet_NaN()) == L"nan" );
+#if !defined(__ia64__) && !defined(_M_IA64)
+    BOOST_TEST(lexical_cast<std::wstring>(
+                (boost::core::copysign)(std::numeric_limits<test_t >::quiet_NaN(), static_cast<test_t>(-1.0)))
+                == L"-nan" );
+#endif
+
+#endif
+}
+
+void test_inf_nan_float()
+{
+    test_inf_nan_templated<float >();
+
+    BOOST_TEST(is_pos_nan(lexical_cast<float>(std::numeric_limits<float>::quiet_NaN())));
+    BOOST_TEST(is_neg_nan(lexical_cast<float>(-std::numeric_limits<float>::quiet_NaN())));
+    BOOST_TEST(is_pos_inf(lexical_cast<float>(std::numeric_limits<float>::infinity())));
+    BOOST_TEST(is_neg_inf(lexical_cast<float>(-std::numeric_limits<float>::infinity())));
+
+    BOOST_TEST(is_pos_nan(lexical_cast<float>(std::numeric_limits<double>::quiet_NaN())));
+    BOOST_TEST(is_neg_nan(lexical_cast<float>(-std::numeric_limits<double>::quiet_NaN())));
+    BOOST_TEST(is_pos_inf(lexical_cast<float>(std::numeric_limits<double>::infinity())));
+    BOOST_TEST(is_neg_inf(lexical_cast<float>(-std::numeric_limits<double>::infinity())));
+}
+
+void test_inf_nan_double()
+{
+    test_inf_nan_templated<double >();
+
+    BOOST_TEST(is_pos_nan(lexical_cast<double>(std::numeric_limits<float>::quiet_NaN())));
+    BOOST_TEST(is_neg_nan(lexical_cast<double>(-std::numeric_limits<float>::quiet_NaN())));
+    BOOST_TEST(is_pos_inf(lexical_cast<double>(std::numeric_limits<float>::infinity())));
+    BOOST_TEST(is_neg_inf(lexical_cast<double>(-std::numeric_limits<float>::infinity())));
+
+    BOOST_TEST(is_pos_nan(lexical_cast<double>(std::numeric_limits<double>::quiet_NaN())));
+    BOOST_TEST(is_neg_nan(lexical_cast<double>(-std::numeric_limits<double>::quiet_NaN())));
+    BOOST_TEST(is_pos_inf(lexical_cast<double>(std::numeric_limits<double>::infinity())));
+    BOOST_TEST(is_neg_inf(lexical_cast<double>(-std::numeric_limits<double>::infinity())));
+
+    BOOST_TEST(is_pos_nan(lexical_cast<double>(std::numeric_limits<long double>::quiet_NaN())));
+    BOOST_TEST(is_neg_nan(lexical_cast<double>(-std::numeric_limits<long double>::quiet_NaN())));
+    BOOST_TEST(is_pos_inf(lexical_cast<double>(std::numeric_limits<long double>::infinity())));
+    BOOST_TEST(is_neg_inf(lexical_cast<double>(-std::numeric_limits<long double>::infinity())));
+}
+
+void test_inf_nan_long_double()
+{
+// We do not run tests on compilers with bugs
+#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
+    test_inf_nan_templated<long double >();
+#endif
+    BOOST_TEST(true);
+}
+
+template <class Integral>
+void test_inf_nan_to_integral()
+{
+    BOOST_TEST_THROWS(lexical_cast<Integral>(std::numeric_limits<float>::quiet_NaN()), boost::bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(-std::numeric_limits<float>::quiet_NaN()), boost::bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(std::numeric_limits<float>::infinity()), boost::bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(-std::numeric_limits<float>::infinity()), boost::bad_lexical_cast);
+
+    BOOST_TEST_THROWS(lexical_cast<Integral>(std::numeric_limits<double>::quiet_NaN()), boost::bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(-std::numeric_limits<double>::quiet_NaN()), boost::bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(std::numeric_limits<double>::infinity()), boost::bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(-std::numeric_limits<double>::infinity()), boost::bad_lexical_cast);
+
+    BOOST_TEST_THROWS(lexical_cast<Integral>(std::numeric_limits<long double>::quiet_NaN()), boost::bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(-std::numeric_limits<long double>::quiet_NaN()), boost::bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(std::numeric_limits<long double>::infinity()), boost::bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<Integral>(-std::numeric_limits<long double>::infinity()), boost::bad_lexical_cast);
+}
+
+int main()
+{
+    test_inf_nan_float();
+    test_inf_nan_double();
+    test_inf_nan_long_double();
+
+    test_inf_nan_to_integral<int>();
+    test_inf_nan_to_integral<bool>();
+    test_inf_nan_to_integral<short>();
+
+    return boost::report_errors();
+}

test/integral_types_test.cpp

@@ -4,7 +4,7 @@
 //
 //  Copyright Terje Sletteb and Kevlin Henney, 2005.
 //  Copyright Alexander Nasonov, 2006.
-//  Copyright Antony Polukhin, 2011-2012.
+//  Copyright Antony Polukhin, 2011-2026.
 //
 //  Distributed under the Boost
 //  Software License, Version 1.0. (See accompanying file
@@ -19,25 +19,20 @@
 //
 #define _SCL_SECURE_NO_WARNINGS
 
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
-
-#include <boost/lexical_cast.hpp>
-
 #include <boost/cstdint.hpp>
-#include <boost/test/unit_test.hpp>
-#include <boost/test/floating_point_comparison.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <boost/lexical_cast/detail/type_traits.hpp>
 
 #include <boost/type_traits/integral_promotion.hpp>
-#include <boost/type_traits/make_unsigned.hpp>
 #include <string>
+#include <sstream>
 #include <vector>
 #include <memory>
+#include <type_traits>
+
+#include <boost/lexical_cast.hpp>
 
 #if (defined(BOOST_HAS_LONG_LONG) || defined(BOOST_HAS_MS_INT64)) \
     && !(defined(BOOST_MSVC) && BOOST_MSVC < 1300)
@@ -48,6 +43,11 @@
 #define BOOST_LCAST_NO_WCHAR_T
 #endif
 
+// There's no typeinfo for unsigned __int128 in Xcode_15.0.1
+#if defined(BOOST_HAS_INT128) && !defined(BOOST_LEXICAL_CAST_TEST_NO_128_INTS) && !defined(__APPLE__)
+# define BOOST_LCAST_TEST_128 1
+#endif
+
 // Test all 65536 values if true:
 bool const lcast_test_small_integral_types_completely = false;
 
@@ -57,112 +57,65 @@ int const lcast_integral_test_counter=500;
 
 using namespace boost;
 
-
-
-void test_conversion_from_to_short();
-void test_conversion_from_to_ushort();
-void test_conversion_from_to_int();
-void test_conversion_from_to_uint();
-void test_conversion_from_to_long();
-void test_conversion_from_to_ulong();
-void test_conversion_from_to_intmax_t();
-void test_conversion_from_to_uintmax_t();
-#ifdef LCAST_TEST_LONGLONG
-void test_conversion_from_to_longlong();
-void test_conversion_from_to_ulonglong();
-#endif
-#ifdef BOOST_HAS_INT128
-void test_conversion_from_to_int128();
-void test_conversion_from_to_uint128();
-#endif
-void test_integral_conversions_on_min_max();
-
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast unit test on integral types");
-
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_short));
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_ushort));
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_int));
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_uint));
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_long));
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_ulong));
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_intmax_t));
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_uintmax_t));
-#ifdef LCAST_TEST_LONGLONG
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_longlong));
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_ulonglong));
-#endif
-#ifdef BOOST_HAS_INT128
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_int128));
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_uint128));
-#endif
-    suite->add(BOOST_TEST_CASE(&test_integral_conversions_on_min_max));
-
-    return suite;
-}
-
 template<class T, class CharT>
 void test_conversion_from_integral_to_char(CharT zero)
 {
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(0)) == zero + 0);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(1)) == zero + 1);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(2)) == zero + 2);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(3)) == zero + 3);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(4)) == zero + 4);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(5)) == zero + 5);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(6)) == zero + 6);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(7)) == zero + 7);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(8)) == zero + 8);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(9)) == zero + 9);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(0)) == zero + 0);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(1)) == zero + 1);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(2)) == zero + 2);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(3)) == zero + 3);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(4)) == zero + 4);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(5)) == zero + 5);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(6)) == zero + 6);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(7)) == zero + 7);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(8)) == zero + 8);
+    BOOST_TEST(lexical_cast<CharT>(static_cast<T>(9)) == zero + 9);
 
-    BOOST_CHECK_THROW(lexical_cast<CharT>(static_cast<T>(10)), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<CharT>(static_cast<T>(10)), bad_lexical_cast);
 
     T t = (std::numeric_limits<T>::max)();
-    BOOST_CHECK_THROW(lexical_cast<CharT>(t), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<CharT>(t), bad_lexical_cast);
 }
 
 template<class T, class CharT>
 void test_conversion_from_char_to_integral(CharT zero)
 {
-    BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 0)) == static_cast<T>(0) );
-    BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 1)) == static_cast<T>(1) );
-    BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 2)) == static_cast<T>(2) );
-    BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 3)) == static_cast<T>(3) );
-    BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 4)) == static_cast<T>(4) );
-    BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 5)) == static_cast<T>(5) );
-    BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 6)) == static_cast<T>(6) );
-    BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 7)) == static_cast<T>(7) );
-    BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 8)) == static_cast<T>(8) );
-    BOOST_CHECK(lexical_cast<T>( static_cast<CharT>(zero + 9)) == static_cast<T>(9) );
+    BOOST_TEST(lexical_cast<T>( static_cast<CharT>(zero + 0)) == static_cast<T>(0) );
+    BOOST_TEST(lexical_cast<T>( static_cast<CharT>(zero + 1)) == static_cast<T>(1) );
+    BOOST_TEST(lexical_cast<T>( static_cast<CharT>(zero + 2)) == static_cast<T>(2) );
+    BOOST_TEST(lexical_cast<T>( static_cast<CharT>(zero + 3)) == static_cast<T>(3) );
+    BOOST_TEST(lexical_cast<T>( static_cast<CharT>(zero + 4)) == static_cast<T>(4) );
+    BOOST_TEST(lexical_cast<T>( static_cast<CharT>(zero + 5)) == static_cast<T>(5) );
+    BOOST_TEST(lexical_cast<T>( static_cast<CharT>(zero + 6)) == static_cast<T>(6) );
+    BOOST_TEST(lexical_cast<T>( static_cast<CharT>(zero + 7)) == static_cast<T>(7) );
+    BOOST_TEST(lexical_cast<T>( static_cast<CharT>(zero + 8)) == static_cast<T>(8) );
+    BOOST_TEST(lexical_cast<T>( static_cast<CharT>(zero + 9)) == static_cast<T>(9) );
 
-    BOOST_CHECK_THROW(lexical_cast<T>( static_cast<CharT>(zero + 10)), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>( static_cast<CharT>(zero - 1)), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>( static_cast<CharT>(zero + 10)), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>( static_cast<CharT>(zero - 1)), bad_lexical_cast);
 }
 
 template<class T>
 void test_conversion_from_integral_to_integral()
 {
     T t = 0;
-    BOOST_CHECK(lexical_cast<T>(t) == t);
+    BOOST_TEST(lexical_cast<T>(t) == t);
 
     // Next two variables are used to suppress warnings.
     int st = 32767; unsigned int ut = st;
     t = st;
-    BOOST_CHECK(lexical_cast<short>(t) == st);
-    BOOST_CHECK(lexical_cast<unsigned short>(t) == ut);
-    BOOST_CHECK(lexical_cast<int>(t) == st);
-    BOOST_CHECK(lexical_cast<unsigned int>(t) == ut);
-    BOOST_CHECK(lexical_cast<long>(t) == st);
-    BOOST_CHECK(lexical_cast<unsigned long>(t) == ut);
+    BOOST_TEST(lexical_cast<short>(t) == st);
+    BOOST_TEST(lexical_cast<unsigned short>(t) == ut);
+    BOOST_TEST(lexical_cast<int>(t) == st);
+    BOOST_TEST(lexical_cast<unsigned int>(t) == ut);
+    BOOST_TEST(lexical_cast<long>(t) == st);
+    BOOST_TEST(lexical_cast<unsigned long>(t) == ut);
 
     t = (std::numeric_limits<T>::max)();
-    BOOST_CHECK(lexical_cast<T>(t) == t);
+    BOOST_TEST(lexical_cast<T>(t) == t);
 
     t = (std::numeric_limits<T>::min)();
-    BOOST_CHECK(lexical_cast<T>(t) == t);
+    BOOST_TEST(lexical_cast<T>(t) == t);
 }
 
 
@@ -207,39 +160,39 @@ void test_conversion_from_integral_to_string(CharT)
     T t;
 
     t = (limits::min)();
-    BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
+    BOOST_TEST(lexical_cast<string_type>(t) == to_str<CharT>(t));
 
     t = (limits::max)();
-    BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
+    BOOST_TEST(lexical_cast<string_type>(t) == to_str<CharT>(t));
 
     if(limits::digits <= 16 && lcast_test_small_integral_types_completely)
         // min and max have already been tested.
         for(t = 1 + (limits::min)(); t != (limits::max)(); ++t)
-            BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
+            BOOST_TEST(lexical_cast<string_type>(t) == to_str<CharT>(t));
     else
     {
         T const min_val = (limits::min)();
         T const max_val = (limits::max)();
         T const half_max_val = max_val / 2;
         T const cnt = lcast_integral_test_counter; // to suppress warnings
-        unsigned int const counter = cnt < half_max_val ? cnt : half_max_val;
+        T const counter = cnt < half_max_val ? cnt : half_max_val;
 
-        unsigned int i;
+        T i = 0;
 
         // Test values around min:
         t = min_val;
         for(i = 0; i < counter; ++i, ++t)
-            BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
+            BOOST_TEST(lexical_cast<string_type>(t) == to_str<CharT>(t));
 
         // Test values around max:
         t = max_val;
         for(i = 0; i < counter; ++i, --t)
-            BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
+            BOOST_TEST(lexical_cast<string_type>(t) == to_str<CharT>(t));
 
         // Test values around zero:
         if(limits::is_signed)
             for(t = static_cast<T>(-counter); t < static_cast<T>(counter); ++t)
-                BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
+                BOOST_TEST(lexical_cast<string_type>(t) == to_str<CharT>(t));
 
         // Test values around 100, 1000, 10000, ...
         T ten_power = 100;
@@ -247,7 +200,7 @@ void test_conversion_from_integral_to_string(CharT)
         {
             // ten_power + 100 probably never overflows
             for(t = ten_power - 100; t != ten_power + 100; ++t)
-                BOOST_CHECK(lexical_cast<string_type>(t) == to_str<CharT>(t));
+                BOOST_TEST(lexical_cast<string_type>(t) == to_str<CharT>(t));
         }
     }
 }
@@ -265,23 +218,23 @@ void test_conversion_from_string_to_integral(CharT)
     T const max_val = (limits::max)();
 
     s = to_str<CharT>(min_val);
-    BOOST_CHECK_EQUAL(lexical_cast<T>(s), min_val);
+    BOOST_TEST_EQ(lexical_cast<T>(s), min_val);
     if(limits::is_signed)
     {
-        BOOST_CHECK_THROW(lexical_cast<T>(s + zero), bad_lexical_cast);
-        BOOST_CHECK_THROW(lexical_cast<T>(s + nine), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>(s + zero), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>(s + nine), bad_lexical_cast);
     }
 
     s = to_str<CharT>(max_val);
-    BOOST_CHECK_EQUAL(lexical_cast<T>(s), max_val);
+    BOOST_TEST_EQ(lexical_cast<T>(s), max_val);
     {
-        BOOST_CHECK_THROW(lexical_cast<T>(s + zero), bad_lexical_cast);
-        BOOST_CHECK_THROW(lexical_cast<T>(s + nine), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>(s + zero), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>(s + nine), bad_lexical_cast);
 
         s = to_str<CharT>(max_val);
         for (int i =1; i <=10; ++i) {
             s[s.size()-1] += 1;
-            BOOST_CHECK_THROW(lexical_cast<T>( s ), bad_lexical_cast);
+            BOOST_TEST_THROWS(lexical_cast<T>( s ), bad_lexical_cast);
         }
 
         s = to_str<CharT>(max_val);
@@ -289,23 +242,23 @@ void test_conversion_from_string_to_integral(CharT)
         typedef std::numpunct<char> numpunct;
         if ( BOOST_USE_FACET(numpunct, loc).grouping().empty() ) {
             // Following tests work well for locale C
-            BOOST_CHECK_EQUAL(lexical_cast<T>(to_str<CharT>(0)+s), max_val);
-            BOOST_CHECK_EQUAL(lexical_cast<T>(to_str<CharT>(0)+to_str<CharT>(0)+s), max_val);
-            BOOST_CHECK_EQUAL(lexical_cast<T>(to_str<CharT>(0)+to_str<CharT>(0)+to_str<CharT>(0)+s), max_val);
+            BOOST_TEST_EQ(lexical_cast<T>(to_str<CharT>(0)+s), max_val);
+            BOOST_TEST_EQ(lexical_cast<T>(to_str<CharT>(0)+to_str<CharT>(0)+s), max_val);
+            BOOST_TEST_EQ(lexical_cast<T>(to_str<CharT>(0)+to_str<CharT>(0)+to_str<CharT>(0)+s), max_val);
         }
 
         for (int i =1; i <=256; ++i) {
-            BOOST_CHECK_THROW(lexical_cast<T>( to_str<CharT>(i)+s ), bad_lexical_cast);
+            BOOST_TEST_THROWS(lexical_cast<T>( to_str<CharT>(i)+s ), bad_lexical_cast);
         }
 
-        typedef BOOST_DEDUCED_TYPENAME boost::integral_promotion<T>::type promoted;
-        if ( !(boost::is_same<T, promoted>::value) )
+        typedef typename boost::integral_promotion<T>::type promoted;
+        if ( !(std::is_same<T, promoted>::value) )
         {
             promoted prom = max_val;
             s = to_str<CharT>(max_val);
             for (int i =1; i <=256; ++i) {
-                BOOST_CHECK_THROW(lexical_cast<T>( to_str<CharT>(prom+i) ), bad_lexical_cast);
-                BOOST_CHECK_THROW(lexical_cast<T>( to_str<CharT>(i)+s ), bad_lexical_cast);
+                BOOST_TEST_THROWS(lexical_cast<T>( to_str<CharT>(prom+i) ), bad_lexical_cast);
+                BOOST_TEST_THROWS(lexical_cast<T>( to_str<CharT>(i)+s ), bad_lexical_cast);
             }
         }
     }
@@ -313,30 +266,30 @@ void test_conversion_from_string_to_integral(CharT)
     if(limits::digits <= 16 && lcast_test_small_integral_types_completely)
         // min and max have already been tested.
         for(T t = 1 + min_val; t != max_val; ++t)
-            BOOST_CHECK(lexical_cast<T>(to_str<CharT>(t)) == t);
+            BOOST_TEST(lexical_cast<T>(to_str<CharT>(t)) == t);
     else
     {
         T const half_max_val = max_val / 2;
         T const cnt = lcast_integral_test_counter; // to suppress warnings
-        unsigned int const counter = cnt < half_max_val ? cnt : half_max_val;
+        T const counter = cnt < half_max_val ? cnt : half_max_val;
 
         T t;
-        unsigned int i;
+        T i;
 
         // Test values around min:
         t = min_val;
         for(i = 0; i < counter; ++i, ++t)
-            BOOST_CHECK(lexical_cast<T>(to_str<CharT>(t)) == t);
+            BOOST_TEST(lexical_cast<T>(to_str<CharT>(t)) == t);
 
         // Test values around max:
         t = max_val;
         for(i = 0; i < counter; ++i, --t)
-            BOOST_CHECK(lexical_cast<T>(to_str<CharT>(t)) == t);
+            BOOST_TEST(lexical_cast<T>(to_str<CharT>(t)) == t);
 
         // Test values around zero:
         if(limits::is_signed)
             for(t = static_cast<T>(-counter); t < static_cast<T>(counter); ++t)
-                BOOST_CHECK(lexical_cast<T>(to_str<CharT>(t)) == t);
+                BOOST_TEST(lexical_cast<T>(to_str<CharT>(t)) == t);
 
         // Test values around 100, 1000, 10000, ...
         T ten_power = 100;
@@ -344,7 +297,7 @@ void test_conversion_from_string_to_integral(CharT)
         {
             // ten_power + 100 probably never overflows
             for(t = ten_power - 100; t != ten_power + 100; ++t)
-                BOOST_CHECK(lexical_cast<T>(to_str<CharT>(t)) == t);
+                BOOST_TEST(lexical_cast<T>(to_str<CharT>(t)) == t);
         }
     }
 }
@@ -357,32 +310,32 @@ void test_conversion_from_to_integral_for_locale()
     numpunct const& np = BOOST_USE_FACET(numpunct, current_locale);
     if ( !np.grouping().empty() )
     {
-        BOOST_CHECK_THROW(
+        BOOST_TEST_THROWS(
                 lexical_cast<T>( std::string("100") + np.thousands_sep() + np.thousands_sep() + "0" )
                 , bad_lexical_cast);
-        BOOST_CHECK_THROW(lexical_cast<T>( std::string("100") + np.thousands_sep() ), bad_lexical_cast);
-        BOOST_CHECK_THROW(lexical_cast<T>( np.thousands_sep() + std::string("100") ), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>( std::string("100") + np.thousands_sep() ), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>( np.thousands_sep() + std::string("100") ), bad_lexical_cast);
 
         // Exception must not be thrown, when we are using no separators at all
-        BOOST_CHECK( lexical_cast<T>("30000") == static_cast<T>(30000) );
+        BOOST_TEST( lexical_cast<T>("30000") == static_cast<T>(30000) );
     }
 
 
     test_conversion_from_integral_to_integral<T>();
 
     // This is a part of test_conversion_from_integral_to_string<T>('0') method,
-    // but with BOOST_CHECK_EQUAL instead of BOOST_CHECK. It is required to see 
-    // what is produced by the to_str<char>(t) method in situations when result 
-    // is different. BOOST_CHECK does not work with wchar_t.
+    // but with BOOST_TEST_EQ instead of BOOST_TEST. It is required to see
+    // what is produced by the to_str<char>(t) method in situations when result
+    // is different. BOOST_TEST does not work with wchar_t.
     typedef std::numeric_limits<T> limits;
     T t = (limits::min)();
-    BOOST_CHECK_EQUAL(lexical_cast<std::string>(t), to_str<char>(t));
+    BOOST_TEST_EQ(lexical_cast<std::string>(t), to_str<char>(t));
 
     test_conversion_from_integral_to_string<T>('0');
     test_conversion_from_string_to_integral<T>('0');
 #if !defined(BOOST_LCAST_NO_WCHAR_T)
     if (lexical_cast<std::wstring>(t) != to_str<wchar_t>(t)) {
-        // Something went wrong, and now we are attempting to find and print the 
+        // Something went wrong, and now we are attempting to find and print the
         // difference.
         std::wstring wstr = to_str<wchar_t>(t);
         std::string lcast_str = lexical_cast<std::string>(t);
@@ -391,10 +344,10 @@ void test_conversion_from_to_integral_for_locale()
         for (std::size_t i = 0; i < wstr.size(); ++i) {
             str.push_back(static_cast<char>(wstr[i]));
         }
-        
-        BOOST_CHECK_EQUAL(lcast_str.length(), lexical_cast<std::wstring>(t).length());
-        BOOST_CHECK_EQUAL(to_str<char>(t), str);
-        BOOST_CHECK_EQUAL(lcast_str, str);
+
+        BOOST_TEST_EQ(lcast_str.length(), lexical_cast<std::wstring>(t).length());
+        BOOST_TEST_EQ(to_str<char>(t), str);
+        BOOST_TEST_EQ(lcast_str, str);
     }
 
     test_conversion_from_integral_to_string<T>(L'0');
@@ -425,52 +378,52 @@ void test_conversion_from_to_integral_minimal()
     test_conversion_from_integral_to_char<T>(wzero);
     test_conversion_from_char_to_integral<T>(wzero);
 #endif
-#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(_LIBCPP_VERSION)
+#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(_LIBCPP_VERSION) && !defined(BOOST_MSVC)
     char16_t const u16zero = u'0';
     test_conversion_from_integral_to_char<T>(u16zero);
     test_conversion_from_char_to_integral<T>(u16zero);
 #endif
-#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(_LIBCPP_VERSION)
+#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(_LIBCPP_VERSION) && !defined(BOOST_MSVC)
     char32_t const u32zero = u'0';
     test_conversion_from_integral_to_char<T>(u32zero);
     test_conversion_from_char_to_integral<T>(u32zero);
 #endif
 
-    BOOST_CHECK(lexical_cast<T>("-1") == static_cast<T>(-1));
-    BOOST_CHECK(lexical_cast<T>("-9") == static_cast<T>(-9));
-    BOOST_CHECK(lexical_cast<T>(-1) == static_cast<T>(-1));
-    BOOST_CHECK(lexical_cast<T>(-9) == static_cast<T>(-9));
+    BOOST_TEST(lexical_cast<T>("-1") == static_cast<T>(-1));
+    BOOST_TEST(lexical_cast<T>("-9") == static_cast<T>(-9));
+    BOOST_TEST(lexical_cast<T>(-1) == static_cast<T>(-1));
+    BOOST_TEST(lexical_cast<T>(-9) == static_cast<T>(-9));
 
-    BOOST_CHECK_THROW(lexical_cast<T>("-1.0"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>("-9.0"), bad_lexical_cast);
-    BOOST_CHECK(lexical_cast<T>(-1.0) == static_cast<T>(-1));
-    BOOST_CHECK(lexical_cast<T>(-9.0) == static_cast<T>(-9));
+    BOOST_TEST_THROWS(lexical_cast<T>("-1.0"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>("-9.0"), bad_lexical_cast);
+    BOOST_TEST(lexical_cast<T>(-1.0) == static_cast<T>(-1));
+    BOOST_TEST(lexical_cast<T>(-9.0) == static_cast<T>(-9));
 
-    BOOST_CHECK(lexical_cast<T>(static_cast<T>(1)) == static_cast<T>(1));
-    BOOST_CHECK(lexical_cast<T>(static_cast<T>(9)) == static_cast<T>(9));
-    BOOST_CHECK_THROW(lexical_cast<T>(1.1f), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>(1.1), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>(1.1L), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>(1.0001f), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>(1.0001), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>(1.0001L), bad_lexical_cast);
+    BOOST_TEST(lexical_cast<T>(static_cast<T>(1)) == static_cast<T>(1));
+    BOOST_TEST(lexical_cast<T>(static_cast<T>(9)) == static_cast<T>(9));
+    BOOST_TEST_THROWS(lexical_cast<T>(1.1f), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>(1.1), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>(1.1L), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>(1.0001f), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>(1.0001), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>(1.0001L), bad_lexical_cast);
 
-    BOOST_CHECK(lexical_cast<T>("+1") == static_cast<T>(1) );
-    BOOST_CHECK(lexical_cast<T>("+9") == static_cast<T>(9) );
-    BOOST_CHECK(lexical_cast<T>("+10") == static_cast<T>(10) );
-    BOOST_CHECK(lexical_cast<T>("+90") == static_cast<T>(90) );
-    BOOST_CHECK_THROW(lexical_cast<T>("++1"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>("-+9"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>("--1"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>("+-9"), bad_lexical_cast);
+    BOOST_TEST(lexical_cast<T>("+1") == static_cast<T>(1) );
+    BOOST_TEST(lexical_cast<T>("+9") == static_cast<T>(9) );
+    BOOST_TEST(lexical_cast<T>("+10") == static_cast<T>(10) );
+    BOOST_TEST(lexical_cast<T>("+90") == static_cast<T>(90) );
+    BOOST_TEST_THROWS(lexical_cast<T>("++1"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>("-+9"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>("--1"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>("+-9"), bad_lexical_cast);
     // test_conversion_from_to_integral_for_locale
 
     // Overflow test case from David W. Birdsall
     std::string must_owerflow_str =             (sizeof(T) < 16 ?  "160000000000000000000" :  "1600000000000000000000000000000000000000");
     std::string must_owerflow_negative_str =    (sizeof(T) < 16 ? "-160000000000000000000" : "-1600000000000000000000000000000000000000");
     for (int i = 0; i < 15; ++i) {
-        BOOST_CHECK_THROW(lexical_cast<T>(must_owerflow_str), bad_lexical_cast);
-        BOOST_CHECK_THROW(lexical_cast<T>(must_owerflow_negative_str), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>(must_owerflow_str), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>(must_owerflow_negative_str), bad_lexical_cast);
 
         must_owerflow_str += '0';
         must_owerflow_negative_str += '0';
@@ -502,14 +455,14 @@ void test_conversion_from_to_integral()
     {
         std::string msg("Failed to set system locale: ");
         msg += ex.what();
-        BOOST_TEST_MESSAGE(msg);
+        std::cerr << msg;
     }
 
     if(grouping1 != grouping2)
         test_conversion_from_to_integral_for_locale<T>();
 
     if(grouping1.empty() && grouping2.empty())
-        BOOST_TEST_MESSAGE("Formatting with thousands_sep has not been tested");
+        std::cerr << "Formatting with thousands_sep has not been tested";
 }
 
 void test_conversion_from_to_short()
@@ -579,7 +532,7 @@ void test_conversion_from_to_ulonglong()
 #endif
 
 
-#ifdef BOOST_HAS_INT128
+#ifdef BOOST_LCAST_TEST_128
 
 template <bool Specialized, class T>
 struct test_if_specialized {
@@ -596,7 +549,7 @@ struct test_if_specialized<true, T> {
 void test_conversion_from_to_int128()
 {
     test_if_specialized<
-        std::numeric_limits<boost::int128_type>::is_specialized, 
+        std::numeric_limits<boost::int128_type>::is_specialized,
         boost::int128_type
     >::test();
 }
@@ -604,7 +557,7 @@ void test_conversion_from_to_int128()
 void test_conversion_from_to_uint128()
 {
     test_if_specialized<
-        std::numeric_limits<boost::int128_type>::is_specialized, 
+        std::numeric_limits<boost::int128_type>::is_specialized,
         boost::uint128_type
     >::test();
 }
@@ -614,19 +567,19 @@ template <typename SignedT>
 void test_integral_conversions_on_min_max_impl()
 {
     typedef SignedT signed_t;
-    typedef BOOST_DEDUCED_TYPENAME boost::make_unsigned<signed_t>::type unsigned_t;
-    
+    typedef typename boost::detail::lcast::make_unsigned<signed_t>::type unsigned_t;
+
     typedef std::numeric_limits<signed_t> s_limits;
     typedef std::numeric_limits<unsigned_t> uns_limits;
 
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned_t>((uns_limits::max)()), (uns_limits::max)());
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned_t>((uns_limits::min)()), (uns_limits::min)());
+    BOOST_TEST_EQ(lexical_cast<unsigned_t>((uns_limits::max)()), (uns_limits::max)());
+    BOOST_TEST_EQ(lexical_cast<unsigned_t>((uns_limits::min)()), (uns_limits::min)());
 
-    BOOST_CHECK_EQUAL(lexical_cast<signed_t>((s_limits::max)()), (s_limits::max)());
-    BOOST_CHECK_EQUAL(lexical_cast<signed_t>((uns_limits::min)()), static_cast<signed_t>((uns_limits::min)()));
+    BOOST_TEST_EQ(lexical_cast<signed_t>((s_limits::max)()), (s_limits::max)());
+    BOOST_TEST_EQ(lexical_cast<signed_t>((uns_limits::min)()), static_cast<signed_t>((uns_limits::min)()));
 
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned_t>((s_limits::max)()), static_cast<unsigned_t>((s_limits::max)()));
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned_t>((s_limits::min)()), static_cast<unsigned_t>((s_limits::min)()));
+    BOOST_TEST_EQ(lexical_cast<unsigned_t>((s_limits::max)()), static_cast<unsigned_t>((s_limits::max)()));
+    BOOST_TEST_EQ(lexical_cast<unsigned_t>((s_limits::min)()), static_cast<unsigned_t>((s_limits::min)()));
 }
 
 void test_integral_conversions_on_min_max()
@@ -643,11 +596,62 @@ void test_integral_conversions_on_min_max()
     test_integral_conversions_on_min_max_impl<__int64>();
 #endif
 
-#ifdef BOOST_HAS_INT128
+#ifdef BOOST_LCAST_TEST_128
     test_integral_conversions_on_min_max_impl<boost::int128_type>();
 #endif
 #endif
 
 }
 
+void test_negative_integral() {
+    // From https://github.com/boostorg/lexical_cast/issues/45
+    BOOST_TEST_EQ(boost::lexical_cast<int>("-6575543"), -6575543);
+
+    BOOST_TEST_EQ(boost::lexical_cast<int>(-6575543), -6575543);
+
+    BOOST_TEST_EQ(boost::lexical_cast<int>("+6575543"), +6575543);
+    BOOST_TEST_EQ(boost::lexical_cast<int>(6575543), 6575543);
+
+    if (sizeof(short) == 2 && CHAR_BIT == 8) {
+        BOOST_TEST_EQ(boost::lexical_cast<short>("-32768"), -32768);
+        BOOST_TEST_EQ(boost::lexical_cast<short>(-32768), -32768);
+        BOOST_TEST_EQ(boost::lexical_cast<unsigned short>("-32768"), 32768);
+        BOOST_TEST_EQ(boost::lexical_cast<unsigned short>(-32768), 32768);
+
+        BOOST_TEST_EQ(boost::lexical_cast<unsigned short>(65535), 65535);
+
+        BOOST_TEST_THROWS(boost::lexical_cast<unsigned short>(-65536), bad_lexical_cast);
+        BOOST_TEST_EQ(boost::lexical_cast<unsigned short>(-65535), 1);
+        BOOST_TEST_EQ(boost::lexical_cast<unsigned short>(-65534), 2);
+
+        BOOST_TEST_THROWS(boost::lexical_cast<short>(65535), bad_lexical_cast);
+        BOOST_TEST_THROWS(boost::lexical_cast<short>(-65536), bad_lexical_cast);
+        BOOST_TEST_THROWS(boost::lexical_cast<short>(-65535), bad_lexical_cast);
+    }
+}
+
+int main()
+{
+    test_conversion_from_to_short();
+    test_conversion_from_to_ushort();
+    test_conversion_from_to_int();
+    test_conversion_from_to_uint();
+    test_conversion_from_to_long();
+    test_conversion_from_to_ulong();
+    test_conversion_from_to_intmax_t();
+    test_conversion_from_to_uintmax_t();
+#ifdef LCAST_TEST_LONGLONG
+    test_conversion_from_to_longlong();
+    test_conversion_from_to_ulonglong();
+#endif
+#ifdef BOOST_LCAST_TEST_128
+    test_conversion_from_to_int128();
+    test_conversion_from_to_uint128();
+#endif
+    test_integral_conversions_on_min_max();
+
+    test_negative_integral();
+
+    return boost::report_errors();
+}
 

test/iterator_range_test.cpp

@@ -0,0 +1,238 @@
+//  Unit test for boost::lexical_cast.
+//
+//  See http://www.boost.org for most recent version, including documentation.
+//
+//  Copyright Antony Polukhin, 2012-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+
+#include <boost/range/iterator_range.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <boost/lexical_cast.hpp>
+
+using namespace boost;
+
+#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
+#define BOOST_LCAST_NO_WCHAR_T
+#endif
+
+
+#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(_LIBCPP_VERSION) && !defined(BOOST_MSVC)
+#define BOOST_LC_RUNU16
+#endif
+
+#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(_LIBCPP_VERSION) && !defined(BOOST_MSVC)
+#define BOOST_LC_RUNU32
+#endif
+
+struct class_with_user_defined_sream_operators {
+    int i;
+
+    operator int() const {
+        return i;
+    }
+};
+
+template <class CharT>
+inline std::basic_istream<CharT>& operator >> (std::basic_istream<CharT>& istr, class_with_user_defined_sream_operators& rhs)
+{
+    return istr >> rhs.i;
+}
+
+
+template <class RngT>
+void do_test_iterator_range_impl(const RngT& rng)
+{
+    BOOST_TEST_EQ(lexical_cast<int>(rng), 1);
+    BOOST_TEST_EQ(lexical_cast<int>(rng.begin(), rng.size()), 1);
+    BOOST_TEST_EQ(lexical_cast<unsigned int>(rng), 1u);
+    BOOST_TEST_EQ(lexical_cast<unsigned int>(rng.begin(), rng.size()), 1u);
+    BOOST_TEST_EQ(lexical_cast<short>(rng), 1);
+    BOOST_TEST_EQ(lexical_cast<short>(rng.begin(), rng.size()), 1);
+    BOOST_TEST_EQ(lexical_cast<unsigned short>(rng), 1u);
+    BOOST_TEST_EQ(lexical_cast<unsigned short>(rng.begin(), rng.size()), 1u);
+    BOOST_TEST_EQ(lexical_cast<long int>(rng), 1);
+    BOOST_TEST_EQ(lexical_cast<long int>(rng.begin(), rng.size()), 1);
+    BOOST_TEST_EQ(lexical_cast<unsigned long int>(rng), 1u);
+    BOOST_TEST_EQ(lexical_cast<unsigned long int>(rng.begin(), rng.size()), 1u);
+
+#ifdef BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES
+    BOOST_TEST_EQ(lexical_cast<float>(rng), 1.0f);
+    BOOST_TEST_EQ(lexical_cast<float>(rng.begin(), rng.size()), 1.0f);
+    BOOST_TEST_EQ(lexical_cast<double>(rng), 1.0);
+    BOOST_TEST_EQ(lexical_cast<double>(rng.begin(), rng.size()), 1.0);
+#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
+    BOOST_TEST_EQ(lexical_cast<long double>(rng), 1.0L);
+    BOOST_TEST_EQ(lexical_cast<long double>(rng.begin(), rng.size()), 1.0L);
+#endif
+    BOOST_TEST_EQ(lexical_cast<class_with_user_defined_sream_operators>(rng), 1);
+#endif
+#if defined(BOOST_HAS_LONG_LONG)
+    BOOST_TEST_EQ(lexical_cast<boost::ulong_long_type>(rng), 1u);
+    BOOST_TEST_EQ(lexical_cast<boost::ulong_long_type>(rng.begin(), rng.size()), 1u);
+    BOOST_TEST_EQ(lexical_cast<boost::long_long_type>(rng), 1);
+    BOOST_TEST_EQ(lexical_cast<boost::long_long_type>(rng.begin(), rng.size()), 1);
+#elif defined(BOOST_HAS_MS_INT64)
+    BOOST_TEST_EQ(lexical_cast<unsigned __int64>(rng), 1u);
+    BOOST_TEST_EQ(lexical_cast<unsigned __int64>(rng.begin(), rng.size()), 1u);
+    BOOST_TEST_EQ(lexical_cast<__int64>(rng), 1);
+    BOOST_TEST_EQ(lexical_cast<__int64>(rng.begin(), rng.size()), 1);
+#endif
+}
+
+template <class CharT>
+void test_it_range_using_any_chars(CharT* one, CharT* eleven)
+{
+    typedef CharT test_char_type;
+
+    // Zero terminated
+    iterator_range<test_char_type*> rng1(one, one + 1);
+    do_test_iterator_range_impl(rng1);
+
+    iterator_range<const test_char_type*> crng1(one, one + 1);
+    do_test_iterator_range_impl(crng1);
+
+    // Non zero terminated
+    iterator_range<test_char_type*> rng2(eleven, eleven + 1);
+    do_test_iterator_range_impl(rng2);
+
+    iterator_range<const test_char_type*> crng2(eleven, eleven + 1);
+    do_test_iterator_range_impl(crng2);
+}
+
+template <class CharT>
+void test_it_range_using_char(CharT* one, CharT* eleven)
+{
+    typedef CharT test_char_type;
+
+    iterator_range<test_char_type*> rng1(one, one + 1);
+    BOOST_TEST_EQ(lexical_cast<std::string>(rng1), "1");
+
+    iterator_range<const test_char_type*> crng1(one, one + 1);
+    BOOST_TEST_EQ(lexical_cast<std::string>(crng1), "1");
+
+    iterator_range<test_char_type*> rng2(eleven, eleven + 1);
+    BOOST_TEST_EQ(lexical_cast<std::string>(rng2), "1");
+
+    iterator_range<const test_char_type*> crng2(eleven, eleven + 1);
+    BOOST_TEST_EQ(lexical_cast<std::string>(crng2), "1");
+
+    BOOST_TEST_EQ(lexical_cast<float>(rng1), 1.0f);
+    BOOST_TEST_EQ(lexical_cast<double>(rng1), 1.0);
+#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
+    BOOST_TEST_EQ(lexical_cast<long double>(rng1), 1.0L);
+#endif
+    BOOST_TEST_EQ(lexical_cast<class_with_user_defined_sream_operators>(rng1), 1);
+
+    BOOST_TEST_EQ(lexical_cast<float>(crng2), 1.0f);
+    BOOST_TEST_EQ(lexical_cast<double>(crng2), 1.0);
+#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
+    BOOST_TEST_EQ(lexical_cast<long double>(crng2), 1.0L);
+#endif
+    BOOST_TEST_EQ(lexical_cast<class_with_user_defined_sream_operators>(crng2), 1);
+
+#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(_LIBCPP_VERSION)
+    BOOST_TEST(lexical_cast<std::wstring>(rng1) == L"1");
+    BOOST_TEST(lexical_cast<std::wstring>(crng1) == L"1");
+    BOOST_TEST(lexical_cast<std::wstring>(rng2) == L"1");
+    BOOST_TEST(lexical_cast<std::wstring>(crng2) == L"1");
+#endif
+
+#if defined(BOOST_LC_RUNU16) && defined(BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES)
+    typedef std::basic_string<char16_t> my_char16_string;
+    BOOST_TEST(lexical_cast<my_char16_string>(rng1) == u"1");
+    BOOST_TEST(lexical_cast<my_char16_string>(crng1) == u"1");
+    BOOST_TEST(lexical_cast<my_char16_string>(rng2) == u"1");
+    BOOST_TEST(lexical_cast<my_char16_string>(crng2) == u"1");
+#endif
+
+#if defined(BOOST_LC_RUNU32) && defined(BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES)
+    typedef std::basic_string<char32_t> my_char32_string;
+    BOOST_TEST(lexical_cast<my_char32_string>(rng1) == U"1");
+    BOOST_TEST(lexical_cast<my_char32_string>(crng1) == U"1");
+    BOOST_TEST(lexical_cast<my_char32_string>(rng2) == U"1");
+    BOOST_TEST(lexical_cast<my_char32_string>(crng2) == U"1");
+#endif
+}
+
+void test_char_iterator_ranges()
+{
+    typedef char test_char_type;
+    test_char_type data1[] = "1";
+    test_char_type data2[] = "11";
+    test_it_range_using_any_chars(data1, data2);
+    test_it_range_using_char(data1, data2);
+}
+
+
+
+void test_unsigned_char_iterator_ranges()
+{
+    typedef unsigned char test_char_type;
+    test_char_type data1[] = "1";
+    test_char_type data2[] = "11";
+    test_it_range_using_any_chars(data1, data2);
+    test_it_range_using_char(data1, data2);
+}
+
+void test_signed_char_iterator_ranges()
+{
+    typedef signed char test_char_type;
+    test_char_type data1[] = "1";
+    test_char_type data2[] = "11";
+    test_it_range_using_any_chars(data1, data2);
+    test_it_range_using_char(data1, data2);
+}
+
+void test_wchar_iterator_ranges()
+{
+#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(_LIBCPP_VERSION)
+    typedef wchar_t test_char_type;
+    test_char_type data1[] = L"1";
+    test_char_type data2[] = L"11";
+    test_it_range_using_any_chars(data1, data2);
+#endif
+
+    BOOST_TEST(true);
+}
+
+void test_char16_iterator_ranges()
+{
+#if defined(BOOST_LC_RUNU16)
+    typedef char16_t test_char_type;
+    test_char_type data1[] = u"1";
+    test_char_type data2[] = u"11";
+    test_it_range_using_any_chars(data1, data2);
+#endif
+
+    BOOST_TEST(true);
+}
+
+void test_char32_iterator_ranges()
+{
+#if defined(BOOST_LC_RUNU32)
+    typedef char32_t test_char_type;
+    test_char_type data1[] = U"1";
+    test_char_type data2[] = U"11";
+    test_it_range_using_any_chars(data1, data2);
+#endif
+
+    BOOST_TEST(true);
+}
+
+int main()
+{
+    test_char_iterator_ranges();
+    test_unsigned_char_iterator_ranges();
+    test_signed_char_iterator_ranges();
+    test_wchar_iterator_ranges();
+    test_char16_iterator_ranges();
+    test_char32_iterator_ranges();
+
+    return boost::report_errors();
+}

test/lexical_cast_containers_test.cpp

@@ -1,83 +0,0 @@
-//  Testing boost::lexical_cast with boost::container::string.
-//
-//  See http://www.boost.org for most recent version, including documentation.
-//
-//  Copyright Antony Polukhin, 2011.
-//
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
-
-#include <boost/lexical_cast.hpp>
-#include <boost/test/unit_test.hpp>
-#include <boost/container/string.hpp>
-
-void testing_boost_containers_basic_string();
-void testing_boost_containers_string_std_string();
-void testing_boost_containers_string_widening();
-
-
-using namespace boost;
-
-boost::unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("Testing boost::lexical_cast with boost::container::string");
-    suite->add(BOOST_TEST_CASE(testing_boost_containers_basic_string));
-    suite->add(BOOST_TEST_CASE(testing_boost_containers_string_std_string));
-    suite->add(BOOST_TEST_CASE(testing_boost_containers_string_widening));
-
-    return suite;
-}
-
-void testing_boost_containers_basic_string()
-{
-    BOOST_CHECK("100" == lexical_cast<boost::container::string>("100"));
-    BOOST_CHECK(L"100" == lexical_cast<boost::container::wstring>(L"100"));
-
-    BOOST_CHECK("100" == lexical_cast<boost::container::string>(100));
-    boost::container::string str("1000");
-    BOOST_CHECK(1000 == lexical_cast<int>(str));
-}
-
-#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
-#define BOOST_LCAST_NO_WCHAR_T
-#endif
-
-void testing_boost_containers_string_std_string()
-{
-    std::string std_str("std_str");
-    boost::container::string boost_str("boost_str");
-    BOOST_CHECK(boost::lexical_cast<std::string>(boost_str) == "boost_str");
-    BOOST_CHECK(boost::lexical_cast<boost::container::string>(std_str) == "std_str");
-
-#ifndef BOOST_LCAST_NO_WCHAR_T
-    std::wstring std_wstr(L"std_wstr");
-    boost::container::wstring boost_wstr(L"boost_wstr");
-
-    BOOST_CHECK(boost::lexical_cast<std::wstring>(boost_wstr) == L"boost_wstr");
-    BOOST_CHECK(boost::lexical_cast<boost::container::wstring>(std_wstr) == L"std_wstr");
-
-#endif
-
-}
-
-void testing_boost_containers_string_widening()
-{
-    const char char_array[] = "Test string";
-
-#ifndef BOOST_LCAST_NO_WCHAR_T
-    const wchar_t wchar_array[] = L"Test string";
-    BOOST_CHECK(boost::lexical_cast<boost::container::wstring>(char_array) == wchar_array);
-#endif
-
-#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && defined(BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES)
-    const char16_t char16_array[] = u"Test string";
-    BOOST_CHECK(boost::lexical_cast<boost::container::basic_string<char16_t> >(char_array) == char16_array);
-#endif
-
-#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && defined(BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES)
-    const char32_t char32_array[] = U"Test string";
-    BOOST_CHECK(boost::lexical_cast<boost::container::basic_string<char32_t> >(char_array) == char32_array);
-#endif
-}

test/lexical_cast_empty_input_test.cpp

@@ -1,167 +0,0 @@
-//  Unit test for boost::lexical_cast.
-//
-//  See http://www.boost.org for most recent version, including documentation.
-//
-//  Copyright Antony Polukhin, 2011.
-//
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
-
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
-
-#include <boost/lexical_cast.hpp>
-#include <boost/test/unit_test.hpp>
-#include <boost/range/iterator_range.hpp>
-
-using namespace boost;
-
-#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
-#define BOOST_LCAST_NO_WCHAR_T
-#endif
-
-template <class T>
-void do_test_on_empty_input(T& v)
-{
-    BOOST_CHECK_THROW(lexical_cast<int>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<float>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<double>(v), bad_lexical_cast);
-#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
-    BOOST_CHECK_THROW(lexical_cast<long double>(v), bad_lexical_cast);
-#endif
-    BOOST_CHECK_THROW(lexical_cast<unsigned int>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned short>(v), bad_lexical_cast);
-#if defined(BOOST_HAS_LONG_LONG)
-    BOOST_CHECK_THROW(lexical_cast<boost::ulong_long_type>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<boost::long_long_type>(v), bad_lexical_cast);
-#elif defined(BOOST_HAS_MS_INT64)
-    BOOST_CHECK_THROW(lexical_cast<unsigned __int64>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<__int64>(v), bad_lexical_cast);
-#endif
-}
-
-void test_empty_iterator_range()
-{
-
-    boost::iterator_range<char*> v;
-    do_test_on_empty_input(v);
-    BOOST_CHECK_EQUAL(lexical_cast<std::string>(v), std::string());
-    BOOST_CHECK_THROW(lexical_cast<char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<signed char>(v), bad_lexical_cast);
-
-    boost::iterator_range<const char*> cv;
-    do_test_on_empty_input(cv);
-    BOOST_CHECK_EQUAL(lexical_cast<std::string>(cv), std::string());
-    BOOST_CHECK_THROW(lexical_cast<char>(cv), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned char>(cv), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<signed char>(cv), bad_lexical_cast);
-
-    const boost::iterator_range<const char*> ccv;
-    do_test_on_empty_input(ccv);
-    BOOST_CHECK_EQUAL(lexical_cast<std::string>(ccv), std::string());
-    BOOST_CHECK_THROW(lexical_cast<char>(ccv), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned char>(ccv), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<signed char>(ccv), bad_lexical_cast);
-}
-
-void test_empty_string()
-{
-    std::string v;
-    do_test_on_empty_input(v);
-    BOOST_CHECK_THROW(lexical_cast<char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<signed char>(v), bad_lexical_cast);
-
-#ifndef BOOST_LCAST_NO_WCHAR_T
-    std::wstring vw;
-    do_test_on_empty_input(vw);
-    BOOST_CHECK_THROW(lexical_cast<wchar_t>(vw), bad_lexical_cast);
-#endif
-
-// Currently, no compiler and STL library fully support char16_t and char32_t
-//#ifndef BOOST_NO_CXX11_CHAR16_T
-//    std::basic_string<char16_t> v16w;
-//    do_test_on_empty_input(v16w);
-//    BOOST_CHECK_THROW(lexical_cast<char16_t>(v16w), bad_lexical_cast);
-//#endif
-//#ifndef BOOST_NO_CXX11_CHAR32_T
-//    std::basic_string<char32_t> v32w;
-//    do_test_on_empty_input(v32w);
-//    BOOST_CHECK_THROW(lexical_cast<char32_t>(v32w), bad_lexical_cast);
-//#endif
-}
-
-struct Escape
-{
-    Escape(const std::string& s)
-        : str_(s)
-    {}
-
-    std::string str_;
-};
-
-inline std::ostream& operator<< (std::ostream& o, const Escape& rhs)
-{
-    return o << rhs.str_;
-}
-
-void test_empty_user_class()
-{
-    Escape v("");
-    do_test_on_empty_input(v);
-    BOOST_CHECK_THROW(lexical_cast<char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<signed char>(v), bad_lexical_cast);
-}
-
-namespace std {
-inline std::ostream & operator<<(std::ostream & out, const std::vector<long> & v)
-{
-    std::ostream_iterator<long> it(out);
-    std::copy(v.begin(), v.end(), it);
-    assert(out);
-    return out;
-}
-}
-
-void test_empty_vector()
-{
-    std::vector<long> v;
-    do_test_on_empty_input(v);
-    BOOST_CHECK_THROW(lexical_cast<char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<signed char>(v), bad_lexical_cast);
-}
-
-
-struct my_string {
-    friend std::ostream &operator<<(std::ostream& sout, my_string const&/* st*/) {
-            return sout << "";
-    }
-};
-
-void test_empty_zero_terminated_string()
-{
-    my_string st;
-    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(st), std::string());;
-}
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast. Empty input unit test");
-    suite->add(BOOST_TEST_CASE(&test_empty_iterator_range));
-    suite->add(BOOST_TEST_CASE(&test_empty_string));
-    suite->add(BOOST_TEST_CASE(&test_empty_user_class));
-    suite->add(BOOST_TEST_CASE(&test_empty_vector));
-    suite->add(BOOST_TEST_CASE(&test_empty_zero_terminated_string));
-
-    return suite;
-}

test/lexical_cast_filesystem_test.cpp

@@ -1,46 +0,0 @@
-//  Unit test for boost::lexical_cast.
-//
-//  See http://www.boost.org for most recent version, including documentation.
-//
-//  Copyright Antony Polukhin, 2013.
-//
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
-//
-// Test lexical_cast usage with long filesystem::path. Bug 7704.
-
-#include <boost/config.hpp>
-
-#include <boost/test/unit_test.hpp>
-#include <boost/lexical_cast.hpp>
-#include <boost/filesystem/path.hpp>
-
-using namespace boost;
-
-void test_filesystem();
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast unit test");
-    suite->add(BOOST_TEST_CASE(&test_filesystem));
-
-    return suite;
-}
-
-void test_filesystem()
-{
-    boost::filesystem::path p;
-    std::string s1 = "aaaaaaaaaaaaaaaaaaaaaaa";
-    p = boost::lexical_cast<boost::filesystem::path>(s1);
-    BOOST_CHECK(!p.empty());
-    BOOST_CHECK_EQUAL(p, s1);
-    p.clear();
-
-    const char ab[] = "aaaaaaaaaaaaaaaaaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb";
-    p = boost::lexical_cast<boost::filesystem::path>(ab);
-    BOOST_CHECK(!p.empty());
-    BOOST_CHECK_EQUAL(p, ab);
-}
-

test/lexical_cast_float_types_test.cpp

@@ -1,528 +0,0 @@
-//  Unit test for boost::lexical_cast.
-//
-//  See http://www.boost.org for most recent version, including documentation.
-//
-//  Copyright Antony Polukhin, 2011.
-//
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
-
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
-
-#include <boost/lexical_cast.hpp>
-
-#include <boost/cstdint.hpp>
-#include <boost/test/unit_test.hpp>
-#include <boost/test/floating_point_comparison.hpp>
-#include <boost/math/tools/precision.hpp>
-
-void test_conversion_from_to_float();
-void test_conversion_from_to_double();
-void test_conversion_from_to_long_double();
-
-using namespace boost;
-
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast float types unit test");
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_float));
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_double));
-    suite->add(BOOST_TEST_CASE(&test_conversion_from_to_long_double));
-
-    return suite;
-}
-
-
-// Replace "-,999" with "-999".
-template<class CharT>
-std::basic_string<CharT> to_str_gcc_workaround(std::basic_string<CharT> str)
-{
-    std::locale loc;
-    std::numpunct<CharT> const& np = BOOST_USE_FACET(std::numpunct<CharT>, loc);
-    std::ctype<CharT> const& ct = BOOST_USE_FACET(std::ctype<CharT>, loc);
-
-    if(np.grouping().empty())
-        return str;
-
-    CharT prefix[3] = { ct.widen('-'), np.thousands_sep(), CharT() };
-
-    if(str.find(prefix) != 0)
-        return str;
-
-    prefix[1] = CharT();
-    str.replace(0, 2, prefix);
-    return str;
-}
-
-template<class CharT, class T>
-std::basic_string<CharT> to_str(T t)
-{
-    std::basic_ostringstream<CharT> o;
-    o << t;
-    return to_str_gcc_workaround(o.str());
-}
-
-
-template<class T>
-void test_conversion_from_to_float_for_locale()
-{
-    std::locale current_locale;
-    typedef std::numpunct<char> numpunct;
-    numpunct const& np = BOOST_USE_FACET(numpunct, current_locale);
-    if ( !np.grouping().empty() )
-    {
-        BOOST_CHECK_THROW(
-                lexical_cast<T>( std::string("100") + np.thousands_sep() + np.thousands_sep() + "0" )
-                , bad_lexical_cast);
-        BOOST_CHECK_THROW(lexical_cast<T>( std::string("100") + np.thousands_sep() ), bad_lexical_cast);
-        BOOST_CHECK_THROW(lexical_cast<T>( np.thousands_sep() + std::string("100") ), bad_lexical_cast);
-        BOOST_CHECK_THROW(lexical_cast<T>( std::string("1") + np.thousands_sep() + np.decimal_point() + "e10" ), bad_lexical_cast);
-        BOOST_CHECK_THROW(lexical_cast<T>( std::string("1e10") + np.thousands_sep() ), bad_lexical_cast);
-        BOOST_CHECK_THROW(lexical_cast<T>( std::string("1") + np.thousands_sep() + "e10" ), bad_lexical_cast);
-
-        BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( to_str< char >(100000) ), 100000, (boost::math::tools::epsilon<T>()) );
-        BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( to_str< char >(10000000u) ), 10000000u, (boost::math::tools::epsilon<T>()) );
-        BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( to_str< char >(100) ), 100, (boost::math::tools::epsilon<T>()) );
-#if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
-        BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( to_str< wchar_t >(100000) ), 100000, (boost::math::tools::epsilon<T>()) );
-        BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( to_str< wchar_t >(10000000u) ), 10000000u, (boost::math::tools::epsilon<T>()) );
-        BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( to_str< wchar_t >(100) ), 100, (boost::math::tools::epsilon<T>()) );
-#endif
-        // Exception must not be thrown, when we are using no separators at all
-        BOOST_CHECK_CLOSE_FRACTION( lexical_cast<T>("30000"), static_cast<T>(30000), (boost::math::tools::epsilon<T>()) );
-    }
-}
-
-
-
-
-/*
- * Converts char* [and wchar_t*] to float number type and checks, that generated
- * number does not exceeds allowed epsilon.
- */
-#ifndef BOOST_LCAST_NO_WCHAR_T
-#define CHECK_CLOSE_ABS_DIFF(VAL,PREFIX)                                                          \
-    converted_val = lexical_cast<test_t>(#VAL);                                                   \
-    BOOST_CHECK_CLOSE_FRACTION( (static_cast<bool>(VAL ## L)? VAL ## L : boost::math::tools::epsilon<test_t>()), \
-                       (converted_val ? converted_val : boost::math::tools::epsilon<test_t>()),\
-                       boost::math::tools::epsilon<test_t>()                                     \
-                     );                                                                           \
-    BOOST_CHECK_EQUAL(converted_val, lexical_cast<test_t>(L## #VAL) );
-
-#else
-#define CHECK_CLOSE_ABS_DIFF(VAL,TYPE)                                                            \
-    converted_val = lexical_cast<test_t>(#VAL);                                                   \
-    BOOST_CHECK_CLOSE_FRACTION( (static_cast<bool>(VAL ## L)? VAL ## L : boost::math::tools::epsilon<test_t>()), \
-                       (converted_val ? converted_val : boost::math::tools::epsilon<test_t>()),\
-                       boost::math::tools::epsilon<test_t>()                                     \
-                     );
-#endif
-
-template <class TestType>
-void test_converion_to_float_types()
-{
-    typedef TestType test_t;
-    test_t converted_val;
-
-    BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<test_t>('1'), (boost::math::tools::epsilon<test_t>()));
-    BOOST_CHECK_EQUAL(0.0, lexical_cast<test_t>('0'));
-
-    unsigned char const uc_one = '1';
-    unsigned char const uc_zero ='0';
-    BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<test_t>(uc_one), (boost::math::tools::epsilon<test_t>()));
-    BOOST_CHECK_EQUAL(0.0, lexical_cast<test_t>(uc_zero));
-
-    signed char const sc_one = '1';
-    signed char const sc_zero ='0';
-    BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<test_t>(sc_one), (boost::math::tools::epsilon<test_t>()));
-    BOOST_CHECK_EQUAL(0.0, lexical_cast<test_t>(sc_zero));
-
-    BOOST_CHECK_CLOSE_FRACTION(1e34L, lexical_cast<test_t>( "10000000000000000000000000000000000"), (boost::math::tools::epsilon<test_t>()) );
-
-//    VC failes the next test
-//    BOOST_CHECK_CLOSE_FRACTION(1e-35L, lexical_cast<test_t>("0.00000000000000000000000000000000001"), (boost::math::tools::epsilon<test_t>()) );
-    BOOST_CHECK_CLOSE_FRACTION(
-                                    0.1111111111111111111111111111111111111111111111111111111111111111111111111L
-            , lexical_cast<test_t>("0.1111111111111111111111111111111111111111111111111111111111111111111111111")
-            , (boost::math::tools::epsilon<test_t>()) );
-
-    CHECK_CLOSE_ABS_DIFF(1,test_t);
-    BOOST_CHECK_EQUAL(0,lexical_cast<test_t>("0"));
-    CHECK_CLOSE_ABS_DIFF(-1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(1.0, test_t);
-    CHECK_CLOSE_ABS_DIFF(0.0, test_t);
-    CHECK_CLOSE_ABS_DIFF(-1.0,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(1e1, test_t);
-    CHECK_CLOSE_ABS_DIFF(0e1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-1e1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(1.0e1, test_t);
-    CHECK_CLOSE_ABS_DIFF(0.0e1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-1.0e1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(1e-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(0e-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-1e-1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(1.0e-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(0.0e-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-1.0e-1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(1E1, test_t);
-    CHECK_CLOSE_ABS_DIFF(0E1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-1E1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(1.0E1, test_t);
-    CHECK_CLOSE_ABS_DIFF(0.0E1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-1.0E1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(1E-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(0E-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-1E-1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(1.0E-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(0.0E-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-1.0E-1, test_t);
-
-    CHECK_CLOSE_ABS_DIFF(.0E-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(.0E-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-.0E-1, test_t);
-
-    CHECK_CLOSE_ABS_DIFF(10.0, test_t);
-    CHECK_CLOSE_ABS_DIFF(00.0, test_t);
-    CHECK_CLOSE_ABS_DIFF(-10.0,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(10e1, test_t);
-    CHECK_CLOSE_ABS_DIFF(00e1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-10e1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(10.0e1, test_t);
-    CHECK_CLOSE_ABS_DIFF(00.0e1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-10.0e1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(10e-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(00e-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-10e-1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(10.0e-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(00.0e-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-10.0e-1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(10E1, test_t);
-    CHECK_CLOSE_ABS_DIFF(00E1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-10E1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(10.0E1, test_t);
-    CHECK_CLOSE_ABS_DIFF(00.0E1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-10.0E1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(10E-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(00E-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-10E-1,test_t);
-
-    CHECK_CLOSE_ABS_DIFF(10.0E-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(00.0E-1, test_t);
-    CHECK_CLOSE_ABS_DIFF(-10.0E-1, test_t);
-
-    CHECK_CLOSE_ABS_DIFF(-10101.0E-011, test_t);
-    CHECK_CLOSE_ABS_DIFF(-10101093, test_t);
-    CHECK_CLOSE_ABS_DIFF(10101093, test_t);
-
-    CHECK_CLOSE_ABS_DIFF(-.34, test_t);
-    CHECK_CLOSE_ABS_DIFF(.34, test_t);
-    CHECK_CLOSE_ABS_DIFF(.34e10, test_t);
-
-    BOOST_CHECK_THROW(lexical_cast<test_t>("-1.e"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("-1.E"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("1.e"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("1.E"), bad_lexical_cast);
-
-    BOOST_CHECK_THROW(lexical_cast<test_t>("1.0e"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("1.0E"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("10E"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("10e"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("1.0e-"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("1.0E-"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("10E-"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("10e-"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("e1"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("e-1"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("e-"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>(".e"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>(".11111111111111111111111111111111111111111111111111111111111111111111ee"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>(".11111111111111111111111111111111111111111111111111111111111111111111e-"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("."), bad_lexical_cast);
-
-    BOOST_CHECK_THROW(lexical_cast<test_t>("-B"), bad_lexical_cast);
-
-    // Following two tests are not valid for C++11 compilers    
-    //BOOST_CHECK_THROW(lexical_cast<test_t>("0xB"), bad_lexical_cast);
-    //BOOST_CHECK_THROW(lexical_cast<test_t>("0x0"), bad_lexical_cast);
-
-    BOOST_CHECK_THROW(lexical_cast<test_t>("--1.0"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("1.0e--1"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("1.0.0"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("1e1e1"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("1.0e-1e-1"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>(" 1.0"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("1.0 "), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>(""), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("-"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>('\0'), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>('-'), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>('.'), bad_lexical_cast);
-}
-
-template <class T>
-void test_float_typess_for_overflows()
-{
-    typedef T test_t;
-    test_t minvalue = (std::numeric_limits<test_t>::min)();
-    std::string s_min_value = lexical_cast<std::string>(minvalue);
-    BOOST_CHECK_CLOSE_FRACTION(minvalue, lexical_cast<test_t>(minvalue), (boost::math::tools::epsilon<test_t>()));
-    BOOST_CHECK_CLOSE_FRACTION(minvalue, lexical_cast<test_t>(s_min_value), (boost::math::tools::epsilon<test_t>() * 2));
-
-    test_t maxvalue = (std::numeric_limits<test_t>::max)();
-    std::string s_max_value = lexical_cast<std::string>(maxvalue);
-    BOOST_CHECK_CLOSE_FRACTION(maxvalue, lexical_cast<test_t>(maxvalue), (boost::math::tools::epsilon<test_t>()));
-    BOOST_CHECK_CLOSE_FRACTION(maxvalue, lexical_cast<test_t>(s_max_value), (boost::math::tools::epsilon<test_t>()));
-
-#ifndef _LIBCPP_VERSION
-    // libc++ had a bug in implementation of stream conversions for values that must be represented as infinity. 
-    // http://llvm.org/bugs/show_bug.cgi?id=15723#c4
-    BOOST_CHECK_THROW(lexical_cast<test_t>(s_max_value+"1"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>(s_max_value+"9"), bad_lexical_cast);
-
-    // VC9 can fail the following tests on floats and doubles when using stingstream...
-    BOOST_CHECK_THROW(lexical_cast<test_t>("1"+s_max_value), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<test_t>("9"+s_max_value), bad_lexical_cast);
-#endif
-
-    if ( is_same<test_t,float>::value )
-    {
-        BOOST_CHECK_THROW(lexical_cast<test_t>( (std::numeric_limits<double>::max)() ), bad_lexical_cast);
-        BOOST_CHECK(
-                (std::numeric_limits<double>::min)() - boost::math::tools::epsilon<test_t>()
-                <= lexical_cast<test_t>( (std::numeric_limits<double>::min)() )
-                && lexical_cast<test_t>( (std::numeric_limits<double>::min)() )
-                <= (std::numeric_limits<double>::min)() + boost::math::tools::epsilon<test_t>()
-        );
-    }
-
-    if ( sizeof(test_t) < sizeof(long double) )
-    {
-        BOOST_CHECK_THROW(lexical_cast<test_t>( (std::numeric_limits<long double>::max)() ), bad_lexical_cast);
-        BOOST_CHECK(
-                (std::numeric_limits<long double>::min)() - boost::math::tools::epsilon<test_t>()
-                <= lexical_cast<test_t>( (std::numeric_limits<long double>::min)() )
-                && lexical_cast<test_t>( (std::numeric_limits<long double>::min)() )
-                <= (std::numeric_limits<long double>::min)() + boost::math::tools::epsilon<test_t>()
-        );
-    }
-}
-
-#undef CHECK_CLOSE_ABS_DIFF
-
-// Epsilon is multiplied by 2 because of two lexical conversions
-#define TEST_TO_FROM_CAST_AROUND_TYPED(VAL,STRING_TYPE)                             \
-    test_value = VAL + boost::math::tools::epsilon<test_t>() * i ;                 \
-    converted_val = lexical_cast<test_t>( lexical_cast<STRING_TYPE>(test_value) );  \
-    BOOST_CHECK_CLOSE_FRACTION(                                                     \
-            test_value,                                                             \
-            converted_val,                                                          \
-            boost::math::tools::epsilon<test_t>() * 2                              \
-        );
-
-/*
- * For interval [ from_mult*epsilon+VAL, to_mult*epsilon+VAL ], converts float type
- * numbers to string[wstring] and then back to float type, then compares initial
- * values and generated.
- * Step is epsilon
- */
-#ifndef BOOST_LCAST_NO_WCHAR_T
-#   define TEST_TO_FROM_CAST_AROUND(VAL)                    \
-    for(i=from_mult; i<=to_mult; ++i) {                     \
-        TEST_TO_FROM_CAST_AROUND_TYPED(VAL, std::string)    \
-        TEST_TO_FROM_CAST_AROUND_TYPED(VAL, std::wstring)   \
-    }
-#else
-#   define TEST_TO_FROM_CAST_AROUND(VAL)                    \
-    for(i=from_mult; i<=to_mult; ++i) {                     \
-        TEST_TO_FROM_CAST_AROUND_TYPED(VAL, std::string)    \
-    }
-#endif
-
-template <class TestType>
-void test_converion_from_to_float_types()
-{
-    typedef TestType test_t;
-    test_t test_value;
-    test_t converted_val;
-
-    int i;
-    int from_mult = -50;
-    int to_mult = 50;
-
-    TEST_TO_FROM_CAST_AROUND( 0.0 );
-
-    long double val1;
-    for(val1 = 1.0e-10L; val1 < 1e11; val1*=10 )
-        TEST_TO_FROM_CAST_AROUND( val1 );
-
-    long double val2;
-    for(val2 = -1.0e-10L; val2 > -1e11; val2*=10 )
-        TEST_TO_FROM_CAST_AROUND( val2 );
-
-    from_mult = -100;
-    to_mult = 0;
-    TEST_TO_FROM_CAST_AROUND( (std::numeric_limits<test_t>::max)() );
-
-    from_mult = 0;
-    to_mult = 100;
-    TEST_TO_FROM_CAST_AROUND( (std::numeric_limits<test_t>::min)() );
-}
-
-#undef TEST_TO_FROM_CAST_AROUND
-#undef TEST_TO_FROM_CAST_AROUND_TYPED
-
-
-template<class T, class CharT>
-void test_conversion_from_float_to_char(CharT zero)
-{
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(0)) == zero + 0);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(1)) == zero + 1);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(2)) == zero + 2);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(3)) == zero + 3);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(4)) == zero + 4);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(5)) == zero + 5);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(6)) == zero + 6);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(7)) == zero + 7);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(8)) == zero + 8);
-    BOOST_CHECK(lexical_cast<CharT>(static_cast<T>(9)) == zero + 9);
-
-    BOOST_CHECK_THROW(lexical_cast<CharT>(static_cast<T>(10)), bad_lexical_cast);
-
-    T t = (std::numeric_limits<T>::max)();
-    BOOST_CHECK_THROW(lexical_cast<CharT>(t), bad_lexical_cast);
-}
-
-template<class T, class CharT>
-void test_conversion_from_char_to_float(CharT zero)
-{
-    BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 0)), static_cast<T>(0), (boost::math::tools::epsilon<T>()) );
-    BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 1)), static_cast<T>(1), (boost::math::tools::epsilon<T>()) );
-    BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 2)), static_cast<T>(2), (boost::math::tools::epsilon<T>()) );
-    BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 3)), static_cast<T>(3), (boost::math::tools::epsilon<T>()) );
-    BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 4)), static_cast<T>(4), (boost::math::tools::epsilon<T>()) );
-    BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 5)), static_cast<T>(5), (boost::math::tools::epsilon<T>()) );
-    BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 6)), static_cast<T>(6), (boost::math::tools::epsilon<T>()) );
-    BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 7)), static_cast<T>(7), (boost::math::tools::epsilon<T>()) );
-    BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 8)), static_cast<T>(8), (boost::math::tools::epsilon<T>()) );
-    BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>( static_cast<CharT>(zero + 9)), static_cast<T>(9), (boost::math::tools::epsilon<T>()) );
-
-    BOOST_CHECK_THROW(lexical_cast<T>( static_cast<CharT>(zero + 10)), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>( static_cast<CharT>(zero - 1)), bad_lexical_cast);
-}
-
-struct restore_oldloc
-{
-    std::locale oldloc;
-    ~restore_oldloc() { std::locale::global(oldloc); }
-};
-
-template<class T>
-void test_conversion_from_to_float()
-{    char const zero = '0';
-    signed char const szero = '0';
-    unsigned char const uzero = '0';
-    test_conversion_from_float_to_char<T>(zero);
-    test_conversion_from_char_to_float<T>(zero);
-    test_conversion_from_float_to_char<T>(szero);
-    test_conversion_from_char_to_float<T>(szero);
-    test_conversion_from_float_to_char<T>(uzero);
-    test_conversion_from_char_to_float<T>(uzero);
-    #if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
-    wchar_t const wzero = L'0';
-    test_conversion_from_float_to_char<T>(wzero);
-    test_conversion_from_char_to_float<T>(wzero);
-    #endif
-
-    BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>("+1"), 1, boost::math::tools::epsilon<T>());
-    BOOST_CHECK_CLOSE_FRACTION(lexical_cast<T>("+9"), 9, boost::math::tools::epsilon<T>());
-
-    BOOST_CHECK_THROW(lexical_cast<T>("++1"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>("-+9"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>("--1"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<T>("+-9"), bad_lexical_cast);
-
-    test_converion_to_float_types<T>();
-    test_float_typess_for_overflows<T>();
-    test_converion_from_to_float_types<T>();
-
-
-    typedef std::numpunct<char> numpunct;
-
-    restore_oldloc guard;
-    std::locale const& oldloc = guard.oldloc;
-
-    std::string grouping1 = BOOST_USE_FACET(numpunct, oldloc).grouping();
-    std::string grouping2(grouping1);
-
-    test_conversion_from_to_float_for_locale<T>();
-
-    try
-    {
-        std::locale newloc("");
-        std::locale::global(newloc);
-
-        grouping2 = BOOST_USE_FACET(numpunct, newloc).grouping();
-    }
-    catch(std::exception const& ex)
-    {
-        std::string msg("Failed to set system locale: ");
-        msg += ex.what();
-        BOOST_TEST_MESSAGE(msg);
-    }
-
-    if(grouping1 != grouping2)
-        test_conversion_from_to_float_for_locale<T>();
-
-    if(grouping1.empty() && grouping2.empty())
-        BOOST_TEST_MESSAGE("Formatting with thousands_sep has not been tested");
-}
-
-
-void test_conversion_from_to_float()
-{
-    test_conversion_from_to_float<float>();
-}
-void test_conversion_from_to_double()
-{
-    test_conversion_from_to_float<double>();
-}
-void test_conversion_from_to_long_double()
-{
-// We do not run tests on compilers with bugs
-#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
-    test_conversion_from_to_float<long double>();
-#endif
-    BOOST_CHECK(true);
-}
-
-
-
-
-
-
-

test/lexical_cast_inf_nan_test.cpp

@@ -1,205 +0,0 @@
-//  Unit test for boost::lexical_cast.
-//
-//  See http://www.boost.org for most recent version, including documentation.
-//
-//  Copyright Antony Polukhin, 2011.
-//
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
-
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
-
-#include <boost/lexical_cast.hpp>
-
-
-#include <boost/math/special_functions/sign.hpp>
-#include <boost/math/special_functions/fpclassify.hpp>
-#include <boost/type_traits/is_same.hpp>
-#include <boost/test/unit_test.hpp>
-#include <boost/test/floating_point_comparison.hpp>
-
-#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
-#define BOOST_LCAST_NO_WCHAR_T
-#endif
-
-using namespace boost;
-
-template <class T>
-bool is_pos_inf(T value)
-{
-    return (boost::math::isinf)(value) && !(boost::math::signbit)(value);
-}
-
-template <class T>
-bool is_neg_inf(T value)
-{
-    return (boost::math::isinf)(value) && (boost::math::signbit)(value);
-}
-
-template <class T>
-bool is_pos_nan(T value)
-{
-    return (boost::math::isnan)(value) && !(boost::math::signbit)(value);
-}
-
-template <class T>
-bool is_neg_nan(T value)
-{
-    /* There is some strange behaviour on Itanium platform with -nan nuber for long double.
-    * It is a IA64 feature, or it is a boost::math feature, not a lexical_cast bug */
-#if defined(__ia64__) || defined(_M_IA64)
-    return (boost::math::isnan)(value)
-            && ( boost::is_same<T, long double >::value || (boost::math::signbit)(value) );
-#else
-    return (boost::math::isnan)(value) && (boost::math::signbit)(value);
-#endif
-}
-
-template <class T>
-void test_inf_nan_templated()
-{
-    typedef T test_t;
-
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("inf") ) );
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("INF") ) );
-
-    BOOST_CHECK( is_neg_inf( lexical_cast<test_t>("-inf") ) );
-    BOOST_CHECK( is_neg_inf( lexical_cast<test_t>("-INF") ) );
-
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("+inf") ) );
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("+INF") ) );
-
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("infinity") ) );
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("INFINITY") ) );
-
-    BOOST_CHECK( is_neg_inf( lexical_cast<test_t>("-infinity") ) );
-    BOOST_CHECK( is_neg_inf( lexical_cast<test_t>("-INFINITY") ) );
-
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("+infinity") ) );
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("+INFINITY") ) );
-
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("iNfiNity") ) );
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>("INfinity") ) );
-
-    BOOST_CHECK( is_neg_inf( lexical_cast<test_t>("-inFINITY") ) );
-    BOOST_CHECK( is_neg_inf( lexical_cast<test_t>("-INFINITY") ) );
-
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("nan") ) );
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("NAN") ) );
-
-    BOOST_CHECK( is_neg_nan( lexical_cast<test_t>("-nan") ) );
-    BOOST_CHECK( is_neg_nan( lexical_cast<test_t>("-NAN") ) );
-
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("+nan") ) );
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("+NAN") ) );
-
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("nAn") ) );
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("NaN") ) );
-
-    BOOST_CHECK( is_neg_nan( lexical_cast<test_t>("-nAn") ) );
-    BOOST_CHECK( is_neg_nan( lexical_cast<test_t>("-NaN") ) );
-
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("+Nan") ) );
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("+nAN") ) );
-
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("nan()") ) );
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>("NAN(some string)") ) );
-    BOOST_CHECK_THROW( lexical_cast<test_t>("NAN(some string"), bad_lexical_cast );
-
-    BOOST_CHECK(lexical_cast<std::string>( (boost::math::changesign)(std::numeric_limits<test_t >::infinity()))
-                == "-inf" );
-    BOOST_CHECK(lexical_cast<std::string>( std::numeric_limits<test_t >::infinity()) == "inf" );
-    BOOST_CHECK(lexical_cast<std::string>( std::numeric_limits<test_t >::quiet_NaN()) == "nan" );
-#if !defined(__ia64__) && !defined(_M_IA64)
-    BOOST_CHECK(lexical_cast<std::string>(
-                (boost::math::changesign)(std::numeric_limits<test_t >::quiet_NaN()))
-                == "-nan" );
-#endif
-
-#ifndef  BOOST_LCAST_NO_WCHAR_T
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"inf") ) );
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"INF") ) );
-
-    BOOST_CHECK( is_neg_inf( lexical_cast<test_t>(L"-inf") ) );
-    BOOST_CHECK( is_neg_inf( lexical_cast<test_t>(L"-INF") ) );
-
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"+inf") ) );
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"+INF") ) );
-
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"infinity") ) );
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"INFINITY") ) );
-
-    BOOST_CHECK( is_neg_inf( lexical_cast<test_t>(L"-infinity") ) );
-    BOOST_CHECK( is_neg_inf( lexical_cast<test_t>(L"-INFINITY") ) );
-
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"+infinity") ) );
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"+INFINITY") ) );
-
-    BOOST_CHECK( is_neg_inf( lexical_cast<test_t>(L"-infINIty") ) );
-    BOOST_CHECK( is_neg_inf( lexical_cast<test_t>(L"-INFiniTY") ) );
-
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"+inFINIty") ) );
-    BOOST_CHECK( is_pos_inf( lexical_cast<test_t>(L"+INfinITY") ) );
-
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>(L"nan") ) );
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>(L"NAN") ) );
-
-    BOOST_CHECK( is_neg_nan( lexical_cast<test_t>(L"-nan") ) );
-    BOOST_CHECK( is_neg_nan( lexical_cast<test_t>(L"-NAN") ) );
-
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>(L"+nan") ) );
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>(L"+NAN") ) );
-
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>(L"nan()") ) );
-    BOOST_CHECK( is_pos_nan( lexical_cast<test_t>(L"NAN(some string)") ) );
-    BOOST_CHECK_THROW( lexical_cast<test_t>(L"NAN(some string"), bad_lexical_cast );
-
-    BOOST_CHECK(lexical_cast<std::wstring>( (boost::math::changesign)(std::numeric_limits<test_t >::infinity()))
-                == L"-inf" );
-    BOOST_CHECK(lexical_cast<std::wstring>( std::numeric_limits<test_t >::infinity()) == L"inf" );
-    BOOST_CHECK(lexical_cast<std::wstring>( std::numeric_limits<test_t >::quiet_NaN()) == L"nan" );
-#if !defined(__ia64__) && !defined(_M_IA64)
-    BOOST_CHECK(lexical_cast<std::wstring>(
-                (boost::math::changesign)(std::numeric_limits<test_t >::quiet_NaN()))
-                == L"-nan" );
-#endif
-
-#endif
-}
-
-void test_inf_nan_float()
-{
-    test_inf_nan_templated<float >();
-}
-
-void test_inf_nan_double()
-{
-    test_inf_nan_templated<double >();
-}
-
-void test_inf_nan_long_double()
-{
-// We do not run tests on compilers with bugs
-#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
-    test_inf_nan_templated<long double >();
-#endif
-    BOOST_CHECK(true);
-}
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast inf anf nan parsing unit test");
-    suite->add(BOOST_TEST_CASE(&test_inf_nan_float));
-    suite->add(BOOST_TEST_CASE(&test_inf_nan_double));
-    suite->add(BOOST_TEST_CASE(&test_inf_nan_long_double));
-
-    return suite;
-}

test/lexical_cast_iterator_range_test.cpp

@@ -1,245 +0,0 @@
-//  Unit test for boost::lexical_cast.
-//
-//  See http://www.boost.org for most recent version, including documentation.
-//
-//  Copyright Antony Polukhin, 2012.
-//
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
-
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
-
-#include <boost/lexical_cast.hpp>
-
-#include <boost/test/unit_test.hpp>
-#include <boost/range/iterator_range.hpp>
-
-using namespace boost;
-
-#if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
-#define BOOST_LCAST_NO_WCHAR_T
-#endif
-
-
-#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(_LIBCPP_VERSION)
-#define BOOST_LC_RUNU16
-#endif
-
-#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(_LIBCPP_VERSION)
-#define BOOST_LC_RUNU32
-#endif
-
-struct class_with_user_defined_sream_operators {
-    int i;
-
-    operator int() const {
-        return i;
-    }
-};
-
-template <class CharT>
-inline std::basic_istream<CharT>& operator >> (std::basic_istream<CharT>& istr, class_with_user_defined_sream_operators& rhs)
-{
-    return istr >> rhs.i;
-}
-
-
-template <class RngT>
-void do_test_iterator_range_impl(const RngT& rng)
-{
-    BOOST_CHECK_EQUAL(lexical_cast<int>(rng), 1);
-    BOOST_CHECK_EQUAL(lexical_cast<int>(rng.begin(), rng.size()), 1);
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned int>(rng), 1u);
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned int>(rng.begin(), rng.size()), 1u);
-    BOOST_CHECK_EQUAL(lexical_cast<short>(rng), 1);
-    BOOST_CHECK_EQUAL(lexical_cast<short>(rng.begin(), rng.size()), 1);
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned short>(rng), 1u);
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned short>(rng.begin(), rng.size()), 1u);
-    BOOST_CHECK_EQUAL(lexical_cast<long int>(rng), 1);
-    BOOST_CHECK_EQUAL(lexical_cast<long int>(rng.begin(), rng.size()), 1);
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned long int>(rng), 1u);
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned long int>(rng.begin(), rng.size()), 1u);
-
-#ifdef BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES
-    BOOST_CHECK_EQUAL(lexical_cast<float>(rng), 1.0f);
-    BOOST_CHECK_EQUAL(lexical_cast<float>(rng.begin(), rng.size()), 1.0f);
-    BOOST_CHECK_EQUAL(lexical_cast<double>(rng), 1.0);
-    BOOST_CHECK_EQUAL(lexical_cast<double>(rng.begin(), rng.size()), 1.0);
-#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
-    BOOST_CHECK_EQUAL(lexical_cast<long double>(rng), 1.0L);
-    BOOST_CHECK_EQUAL(lexical_cast<long double>(rng.begin(), rng.size()), 1.0L);
-#endif
-    BOOST_CHECK_EQUAL(lexical_cast<class_with_user_defined_sream_operators>(rng), 1);
-#endif
-#if defined(BOOST_HAS_LONG_LONG)
-    BOOST_CHECK_EQUAL(lexical_cast<boost::ulong_long_type>(rng), 1u);
-    BOOST_CHECK_EQUAL(lexical_cast<boost::ulong_long_type>(rng.begin(), rng.size()), 1u);
-    BOOST_CHECK_EQUAL(lexical_cast<boost::long_long_type>(rng), 1);
-    BOOST_CHECK_EQUAL(lexical_cast<boost::long_long_type>(rng.begin(), rng.size()), 1);
-#elif defined(BOOST_HAS_MS_INT64)
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned __int64>(rng), 1u);
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned __int64>(rng.begin(), rng.size()), 1u);
-    BOOST_CHECK_EQUAL(lexical_cast<__int64>(rng), 1);
-    BOOST_CHECK_EQUAL(lexical_cast<__int64>(rng.begin(), rng.size()), 1);
-#endif
-}
-
-template <class CharT>
-void test_it_range_using_any_chars(CharT* one, CharT* eleven)
-{
-    typedef CharT test_char_type;
-
-    // Zero terminated
-    iterator_range<test_char_type*> rng1(one, one + 1);
-    do_test_iterator_range_impl(rng1);
-
-    iterator_range<const test_char_type*> crng1(one, one + 1);
-    do_test_iterator_range_impl(crng1);
-
-    // Non zero terminated
-    iterator_range<test_char_type*> rng2(eleven, eleven + 1);
-    do_test_iterator_range_impl(rng2);
-
-    iterator_range<const test_char_type*> crng2(eleven, eleven + 1);
-    do_test_iterator_range_impl(crng2);
-}
-
-template <class CharT>
-void test_it_range_using_char(CharT* one, CharT* eleven)
-{
-    typedef CharT test_char_type;
-
-    iterator_range<test_char_type*> rng1(one, one + 1);
-    BOOST_CHECK_EQUAL(lexical_cast<std::string>(rng1), "1");
-
-    iterator_range<const test_char_type*> crng1(one, one + 1);
-    BOOST_CHECK_EQUAL(lexical_cast<std::string>(crng1), "1");
-
-    iterator_range<test_char_type*> rng2(eleven, eleven + 1);
-    BOOST_CHECK_EQUAL(lexical_cast<std::string>(rng2), "1");
-
-    iterator_range<const test_char_type*> crng2(eleven, eleven + 1);
-    BOOST_CHECK_EQUAL(lexical_cast<std::string>(crng2), "1");
-
-    BOOST_CHECK_EQUAL(lexical_cast<float>(rng1), 1.0f);
-    BOOST_CHECK_EQUAL(lexical_cast<double>(rng1), 1.0);
-#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
-    BOOST_CHECK_EQUAL(lexical_cast<long double>(rng1), 1.0L);
-#endif
-    BOOST_CHECK_EQUAL(lexical_cast<class_with_user_defined_sream_operators>(rng1), 1);
-
-    BOOST_CHECK_EQUAL(lexical_cast<float>(crng2), 1.0f);
-    BOOST_CHECK_EQUAL(lexical_cast<double>(crng2), 1.0);
-#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
-    BOOST_CHECK_EQUAL(lexical_cast<long double>(crng2), 1.0L);
-#endif
-    BOOST_CHECK_EQUAL(lexical_cast<class_with_user_defined_sream_operators>(crng2), 1);
-
-#ifndef BOOST_LCAST_NO_WCHAR_T
-    BOOST_CHECK(lexical_cast<std::wstring>(rng1) == L"1");
-    BOOST_CHECK(lexical_cast<std::wstring>(crng1) == L"1");
-    BOOST_CHECK(lexical_cast<std::wstring>(rng2) == L"1");
-    BOOST_CHECK(lexical_cast<std::wstring>(crng2) == L"1");
-#endif
-
-#if defined(BOOST_LC_RUNU16) && defined(BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES)
-    typedef std::basic_string<char16_t> my_char16_string;
-    BOOST_CHECK(lexical_cast<my_char16_string>(rng1) == u"1");
-    BOOST_CHECK(lexical_cast<my_char16_string>(crng1) == u"1");
-    BOOST_CHECK(lexical_cast<my_char16_string>(rng2) == u"1");
-    BOOST_CHECK(lexical_cast<my_char16_string>(crng2) == u"1");
-#endif
-
-#if defined(BOOST_LC_RUNU32) && defined(BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES)
-    typedef std::basic_string<char32_t> my_char32_string;
-    BOOST_CHECK(lexical_cast<my_char32_string>(rng1) == U"1");
-    BOOST_CHECK(lexical_cast<my_char32_string>(crng1) == U"1");
-    BOOST_CHECK(lexical_cast<my_char32_string>(rng2) == U"1");
-    BOOST_CHECK(lexical_cast<my_char32_string>(crng2) == U"1");
-#endif
-}
-
-void test_char_iterator_ranges()
-{
-    typedef char test_char_type;
-    test_char_type data1[] = "1";
-    test_char_type data2[] = "11";
-    test_it_range_using_any_chars(data1, data2);
-    test_it_range_using_char(data1, data2);
-}
-
-
-
-void test_unsigned_char_iterator_ranges()
-{
-    typedef unsigned char test_char_type;
-    test_char_type data1[] = "1";
-    test_char_type data2[] = "11";
-    test_it_range_using_any_chars(data1, data2);
-    test_it_range_using_char(data1, data2);
-}
-
-void test_signed_char_iterator_ranges()
-{
-    typedef signed char test_char_type;
-    test_char_type data1[] = "1";
-    test_char_type data2[] = "11";
-    test_it_range_using_any_chars(data1, data2);
-    test_it_range_using_char(data1, data2);
-}
-
-void test_wchar_iterator_ranges()
-{
-#ifndef BOOST_LCAST_NO_WCHAR_T
-    typedef wchar_t test_char_type;
-    test_char_type data1[] = L"1";
-    test_char_type data2[] = L"11";
-    test_it_range_using_any_chars(data1, data2);
-#endif
-
-    BOOST_CHECK(true);
-}
-
-void test_char16_iterator_ranges()
-{
-#if defined(BOOST_LC_RUNU16)
-    typedef char16_t test_char_type;
-    test_char_type data1[] = u"1";
-    test_char_type data2[] = u"11";
-    test_it_range_using_any_chars(data1, data2);
-#endif
-
-    BOOST_CHECK(true);
-}
-
-void test_char32_iterator_ranges()
-{
-#if defined(BOOST_LC_RUNU32)
-    typedef char32_t test_char_type;
-    test_char_type data1[] = U"1";
-    test_char_type data2[] = U"11";
-    test_it_range_using_any_chars(data1, data2);
-#endif
-
-    BOOST_CHECK(true);
-}
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite = BOOST_TEST_SUITE("lexical_cast. Testing conversions using iterator_range<>");
-    suite->add(BOOST_TEST_CASE(&test_char_iterator_ranges));
-    suite->add(BOOST_TEST_CASE(&test_unsigned_char_iterator_ranges));
-    suite->add(BOOST_TEST_CASE(&test_signed_char_iterator_ranges));
-    suite->add(BOOST_TEST_CASE(&test_wchar_iterator_ranges));
-    suite->add(BOOST_TEST_CASE(&test_char16_iterator_ranges));
-    suite->add(BOOST_TEST_CASE(&test_char32_iterator_ranges));
-
-    return suite;
-}

test/lexical_cast_no_comp_time_prcision.cpp

@@ -1,28 +0,0 @@
-//  Unit test for boost::lexical_cast for https://svn.boost.org/trac/boost/ticket/11669.
-//
-//  See http://www.boost.org for most recent version, including documentation.
-//
-//  Copyright Antony Polukhin, 2015.
-//
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
-
-#include <string>
-#define BOOST_LCAST_NO_COMPILE_TIME_PRECISION
-#include <boost/lexical_cast.hpp>
-
-#include <boost/test/unit_test.hpp>
-
-void main_check() {
-    BOOST_CHECK(!boost::lexical_cast<std::string>(2.12345).empty());
-    BOOST_CHECK(!boost::lexical_cast<std::string>(2.12345678).empty());
-}
-
-boost::unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    boost::unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast no-compile-time-precision check");
-    suite->add(BOOST_TEST_CASE(main_check));
-    return suite;
-}

test/lexical_cast_no_exceptions_test.cpp

@@ -1,95 +0,0 @@
-//  Unit test for boost::lexical_cast.
-//
-//  See http://www.boost.org for most recent version, including documentation.
-//
-//  Copyright Antony Polukhin, 2012.
-//
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
-
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
-
-#include <boost/lexical_cast.hpp>
-#include <boost/test/unit_test.hpp>
-#include <boost/range/iterator_range.hpp>
-
-#ifndef BOOST_NO_EXCEPTIONS
-#error "This test must be compiled with -DBOOST_NO_EXCEPTIONS"
-#endif
-
-bool g_was_exception = false;
-
-namespace boost {
-
-void throw_exception(std::exception const & ) {
-    g_was_exception = true;
-}
-
-}
-
-using namespace boost;
-
-
-struct Escape
-{
-    Escape(){}
-    Escape(const std::string& s)
-        : str_(s)
-    {}
-
-    std::string str_;
-};
-
-inline std::ostream& operator<< (std::ostream& o, const Escape& rhs)
-{
-    return o << rhs.str_;
-}
-
-inline std::istream& operator>> (std::istream& i, Escape& rhs)
-{
-    return i >> rhs.str_;
-}
-
-void test_exceptions_off()
-{
-    Escape v("");
-
-    g_was_exception = false;
-    lexical_cast<char>(v);
-    BOOST_CHECK(g_was_exception);
-
-    g_was_exception = false;
-    lexical_cast<unsigned char>(v);
-    BOOST_CHECK(g_was_exception);
-
-    v = lexical_cast<Escape>(100);
-    BOOST_CHECK_EQUAL(lexical_cast<int>(v), 100);
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned int>(v), 100u);
-
-    v = lexical_cast<Escape>(0.0);
-    BOOST_CHECK_EQUAL(lexical_cast<double>(v), 0.0);
-
-    BOOST_CHECK_EQUAL(lexical_cast<short>(100), 100);
-    BOOST_CHECK_EQUAL(lexical_cast<float>(0.0), 0.0);
-
-    g_was_exception = false;
-    lexical_cast<short>(700000);
-    BOOST_CHECK(g_was_exception);
-}
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast. Testing with BOOST_NO_EXCEPTIONS");
-    suite->add(BOOST_TEST_CASE(&test_exceptions_off));
-
-    return suite;
-}
-

test/lexical_cast_no_locale_test.cpp

@@ -1,168 +0,0 @@
-//  Unit test for boost::lexical_cast.
-//
-//  See http://www.boost.org for most recent version, including documentation.
-//
-//  Copyright Antony Polukhin, 2012.
-//
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
-
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
-
-#include <boost/lexical_cast.hpp>
-#include <boost/test/unit_test.hpp>
-#include <boost/range/iterator_range.hpp>
-
-using namespace boost;
-
-// Testing compilation and some basic usage with BOOST_NO_STD_LOCALE
-// Tests are mainly copyied from lexical_cast_empty_input_test.cpp (something
-// new added to test_empty_3)
-
-#ifndef BOOST_NO_STD_LOCALE
-#error "This test must be compiled with -DBOOST_NO_STD_LOCALE"
-#endif
-
-
-template <class T>
-void do_test_on_empty_input(T& v)
-{
-    BOOST_CHECK_THROW(lexical_cast<int>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<float>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<double>(v), bad_lexical_cast);
-#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
-    BOOST_CHECK_THROW(lexical_cast<long double>(v), bad_lexical_cast);
-#endif
-    BOOST_CHECK_THROW(lexical_cast<unsigned int>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned short>(v), bad_lexical_cast);
-#if defined(BOOST_HAS_LONG_LONG)
-    BOOST_CHECK_THROW(lexical_cast<boost::ulong_long_type>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<boost::long_long_type>(v), bad_lexical_cast);
-#elif defined(BOOST_HAS_MS_INT64)
-    BOOST_CHECK_THROW(lexical_cast<unsigned __int64>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<__int64>(v), bad_lexical_cast);
-#endif
-}
-
-void test_empty_1()
-{
-    boost::iterator_range<char*> v;
-    do_test_on_empty_input(v);
-    BOOST_CHECK_EQUAL(lexical_cast<std::string>(v), std::string());
-    BOOST_CHECK_THROW(lexical_cast<char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<signed char>(v), bad_lexical_cast);
-
-    boost::iterator_range<const char*> cv;
-    do_test_on_empty_input(cv);
-    BOOST_CHECK_EQUAL(lexical_cast<std::string>(cv), std::string());
-    BOOST_CHECK_THROW(lexical_cast<char>(cv), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned char>(cv), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<signed char>(cv), bad_lexical_cast);
-
-    const boost::iterator_range<const char*> ccv;
-    do_test_on_empty_input(ccv);
-    BOOST_CHECK_EQUAL(lexical_cast<std::string>(ccv), std::string());
-    BOOST_CHECK_THROW(lexical_cast<char>(ccv), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned char>(ccv), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<signed char>(ccv), bad_lexical_cast);
-}
-
-void test_empty_2()
-{
-    std::string v;
-    do_test_on_empty_input(v);
-    BOOST_CHECK_THROW(lexical_cast<char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<signed char>(v), bad_lexical_cast);
-}
-
-struct Escape
-{
-    Escape(){}
-    Escape(const std::string& s)
-        : str_(s)
-    {}
-
-    std::string str_;
-};
-
-inline std::ostream& operator<< (std::ostream& o, const Escape& rhs)
-{
-    return o << rhs.str_;
-}
-
-inline std::istream& operator>> (std::istream& i, Escape& rhs)
-{
-    return i >> rhs.str_;
-}
-
-void test_empty_3()
-{
-    Escape v("");
-    do_test_on_empty_input(v);
-
-    BOOST_CHECK_THROW(lexical_cast<char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<signed char>(v), bad_lexical_cast);
-
-    v = lexical_cast<Escape>(100);
-    BOOST_CHECK_EQUAL(lexical_cast<int>(v), 100);
-    BOOST_CHECK_EQUAL(lexical_cast<unsigned int>(v), 100u);
-
-    v = lexical_cast<Escape>(0.0);
-    BOOST_CHECK_EQUAL(lexical_cast<double>(v), 0.0);
-}
-
-namespace std {
-inline std::ostream & operator<<(std::ostream & out, const std::vector<long> & v)
-{
-    std::ostream_iterator<long> it(out);
-    std::copy(v.begin(), v.end(), it);
-    assert(out);
-    return out;
-}
-}
-
-void test_empty_4()
-{
-    std::vector<long> v;
-    do_test_on_empty_input(v);
-    BOOST_CHECK_THROW(lexical_cast<char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<unsigned char>(v), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<signed char>(v), bad_lexical_cast);
-}
-
-
-struct my_string {
-    friend std::ostream &operator<<(std::ostream& sout, my_string const&/* st*/) {
-            return sout << "";
-    }
-};
-
-void test_empty_5()
-{
-    my_string st;
-    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(st), std::string());;
-}
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast. Testing with BOOST_NO_STD_LOCALE");
-    suite->add(BOOST_TEST_CASE(&test_empty_1));
-    suite->add(BOOST_TEST_CASE(&test_empty_2));
-    suite->add(BOOST_TEST_CASE(&test_empty_3));
-    suite->add(BOOST_TEST_CASE(&test_empty_4));
-    suite->add(BOOST_TEST_CASE(&test_empty_5));
-
-    return suite;
-}
-

test/lexical_cast_old.hpp

@@ -1,6 +1,6 @@
 // Copyright Kevlin Henney, 2000-2005.
 // Copyright Alexander Nasonov, 2006-2010.
-// Copyright Antony Polukhin, 2011-2014.
+// Copyright Antony Polukhin, 2011-2026.
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -32,13 +32,9 @@
 #include <string>
 #include <cstring>
 #include <cstdio>
+#include <type_traits>
 #include <boost/limits.hpp>
-#include <boost/mpl/if.hpp>
-#include <boost/type_traits/ice.hpp>
-#include <boost/type_traits/is_pointer.hpp>
-#include <boost/static_assert.hpp>
-#include <boost/detail/lcast_precision.hpp>
-#include <boost/detail/workaround.hpp>
+#include <boost/config/workaround.hpp>
 
 #ifdef BOOST_NO_STRINGSTREAM
 #include <strstream>
@@ -46,6 +42,10 @@
 #include <sstream>
 #endif
 
+#if defined(BOOST_USE_MODULES)
+#undef BOOST_USE_MODULES
+#endif
+#include <boost/lexical_cast/detail/lcast_precision.hpp>
 #include <boost/lexical_cast/bad_lexical_cast.hpp>
 #include <boost/lexical_cast/detail/widest_char.hpp>
 
@@ -118,7 +118,7 @@ namespace boost {
             template<typename InputStreamable>
             bool operator>>(InputStreamable &output)
             {
-                return !is_pointer<InputStreamable>::value &&
+                return !std::is_pointer<InputStreamable>::value &&
                        stream >> output &&
                        stream.get() == traits_type::eof();
             }
@@ -155,14 +155,14 @@ namespace boost {
     template<typename Target, typename Source>
     Target lexical_cast(Source arg)
     {
-        typedef typename detail::widest_char< 
-            BOOST_DEDUCED_TYPENAME detail::stream_char<Target>::type 
-          , BOOST_DEDUCED_TYPENAME detail::stream_char<Source>::type 
-        >::type char_type; 
+        typedef typename detail::widest_char<
+            typename detail::stream_char<Target>::type
+          , typename detail::stream_char<Source>::type
+        >::type char_type;
 
         typedef std::char_traits<char_type> traits;
         detail::lexical_stream<Target, Source, traits> interpreter;
-        Target result;
+        Target result{};
 
         if(!(interpreter << arg && interpreter >> result))
             boost::conversion::detail::throw_bad_cast<Source, Target>();

test/lexical_cast_stream_traits_test.cpp

@@ -1,154 +0,0 @@
-//  Unit test for boost::lexical_cast.
-//
-//  See http://www.boost.org for most recent version, including documentation.
-//
-//  Copyright Antony Polukhin, 2012-2014.
-//
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
-
-#include <boost/config.hpp>
-
-#include <boost/lexical_cast/detail/converter_lexical.hpp>
-
-#include <boost/test/unit_test.hpp>
-
-template <class T>
-static void test_optimized_types_to_string_const()
-{
-    namespace de = boost::detail;
-    typedef de::lexical_cast_stream_traits<T, std::string> trait_1;
-    BOOST_CHECK(!trait_1::is_source_input_not_optimized_t::value);
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_1::src_char_t, char>::value));
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_1::target_char_t, char>::value));
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_1::char_type, char>::value));
-    BOOST_CHECK(!trait_1::is_string_widening_required_t::value);
-    BOOST_CHECK(!trait_1::is_source_input_not_optimized_t::value);
-        
-    typedef de::lexical_cast_stream_traits<const T, std::string> trait_2;
-    BOOST_CHECK(!trait_2::is_source_input_not_optimized_t::value);
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_2::src_char_t, char>::value));
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_2::target_char_t, char>::value));
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_2::char_type, char>::value));
-    BOOST_CHECK(!trait_2::is_string_widening_required_t::value);
-    BOOST_CHECK(!trait_2::is_source_input_not_optimized_t::value);
-
-    typedef de::lexical_cast_stream_traits<T, std::wstring> trait_3;
-    BOOST_CHECK(!trait_3::is_source_input_not_optimized_t::value);
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_3::src_char_t, char>::value));
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_3::target_char_t, wchar_t>::value));
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_3::char_type, wchar_t>::value));
-
-    BOOST_CHECK((boost::detail::is_character<BOOST_DEDUCED_TYPENAME trait_3::no_cv_src>::value != trait_3::is_string_widening_required_t::value));
-
-    BOOST_CHECK(!trait_3::is_source_input_not_optimized_t::value);
-}    
-
-
-template <class T>
-static void test_optimized_types_to_string()
-{
-    test_optimized_types_to_string_const<T>();
-
-    namespace de = boost::detail;
-    typedef de::lexical_cast_stream_traits<std::string, T> trait_4;
-    BOOST_CHECK(!trait_4::is_source_input_not_optimized_t::value);
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_4::src_char_t, char>::value));
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_4::target_char_t, char>::value));
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_4::char_type, char>::value));
-    BOOST_CHECK(!trait_4::is_string_widening_required_t::value);
-    BOOST_CHECK(!trait_4::is_source_input_not_optimized_t::value);
-        
-    typedef de::lexical_cast_stream_traits<const std::string, T> trait_5;
-    BOOST_CHECK(!trait_5::is_source_input_not_optimized_t::value);
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_5::src_char_t, char>::value));
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_5::target_char_t, char>::value));
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_5::char_type, char>::value));
-    BOOST_CHECK(!trait_5::is_string_widening_required_t::value);
-    BOOST_CHECK(!trait_5::is_source_input_not_optimized_t::value);
-
-    typedef de::lexical_cast_stream_traits<const std::wstring, T> trait_6;
-    BOOST_CHECK(!trait_6::is_source_input_not_optimized_t::value);
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_6::src_char_t, wchar_t>::value));
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_6::target_char_t, char>::value));
-    BOOST_CHECK((boost::is_same<BOOST_DEDUCED_TYPENAME trait_6::char_type, wchar_t>::value));
-    BOOST_CHECK(!trait_6::is_string_widening_required_t::value);
-}
-
-void test_metafunctions()
-{
-    test_optimized_types_to_string<bool>();
-    test_optimized_types_to_string<char>();
-    test_optimized_types_to_string<unsigned char>();
-    test_optimized_types_to_string<signed char>();
-    test_optimized_types_to_string<short>();
-    test_optimized_types_to_string<unsigned short>();
-    test_optimized_types_to_string<int>();
-    test_optimized_types_to_string<unsigned int>();
-    test_optimized_types_to_string<long>();
-    test_optimized_types_to_string<unsigned long>();
-
-#if defined(BOOST_HAS_LONG_LONG)
-    test_optimized_types_to_string<boost::ulong_long_type>();
-    test_optimized_types_to_string<boost::long_long_type>();
-#elif defined(BOOST_HAS_MS_INT64)
-    test_optimized_types_to_string<unsigned __int64>();
-    test_optimized_types_to_string<__int64>();
-#endif
-    
-    test_optimized_types_to_string<std::string>();
-    test_optimized_types_to_string<char*>();
-    //test_optimized_types_to_string<char[5]>();
-    //test_optimized_types_to_string<char[1]>();
-    test_optimized_types_to_string<unsigned char*>();
-    //test_optimized_types_to_string<unsigned char[5]>();
-    //test_optimized_types_to_string<unsigned char[1]>();
-    test_optimized_types_to_string<signed char*>();
-    //test_optimized_types_to_string<signed char[5]>();
-    //test_optimized_types_to_string<signed char[1]>();
-    test_optimized_types_to_string<boost::array<char, 1> >();
-    test_optimized_types_to_string<boost::array<char, 5> >();
-    test_optimized_types_to_string<boost::array<unsigned char, 1> >();
-    test_optimized_types_to_string<boost::array<unsigned char, 5> >();
-    test_optimized_types_to_string<boost::array<signed char, 1> >();
-    test_optimized_types_to_string<boost::array<signed char, 5> >();
-    test_optimized_types_to_string<boost::iterator_range<char*> >();
-    test_optimized_types_to_string<boost::iterator_range<unsigned char*> >();
-    test_optimized_types_to_string<boost::iterator_range<signed char*> >();
-
-    test_optimized_types_to_string_const<boost::array<const char, 1> >();
-    test_optimized_types_to_string_const<boost::array<const char, 5> >();
-    test_optimized_types_to_string_const<boost::array<const unsigned char, 1> >();
-    test_optimized_types_to_string_const<boost::array<const unsigned char, 5> >();
-    test_optimized_types_to_string_const<boost::array<const signed char, 1> >();
-    test_optimized_types_to_string_const<boost::array<const signed char, 5> >();
-    test_optimized_types_to_string_const<boost::iterator_range<const char*> >();
-    test_optimized_types_to_string_const<boost::iterator_range<const unsigned char*> >();
-    test_optimized_types_to_string_const<boost::iterator_range<const signed char*> >();
-
-#ifndef BOOST_NO_CXX11_HDR_ARRAY
-    test_optimized_types_to_string<std::array<char, 1> >();
-    test_optimized_types_to_string<std::array<char, 5> >();
-    test_optimized_types_to_string<std::array<unsigned char, 1> >();
-    test_optimized_types_to_string<std::array<unsigned char, 5> >();
-    test_optimized_types_to_string<std::array<signed char, 1> >();
-    test_optimized_types_to_string<std::array<signed char, 5> >();
-    
-    test_optimized_types_to_string_const<std::array<const char, 1> >();
-    test_optimized_types_to_string_const<std::array<const char, 5> >();
-    test_optimized_types_to_string_const<std::array<const unsigned char, 1> >();
-    test_optimized_types_to_string_const<std::array<const unsigned char, 5> >();
-    test_optimized_types_to_string_const<std::array<const signed char, 1> >();
-    test_optimized_types_to_string_const<std::array<const signed char, 5> >();
-#endif
-}
-
-boost::unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    boost::unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast traits tests");
-    suite->add(BOOST_TEST_CASE(&test_metafunctions));
-    return suite;
-}
-

test/lexical_cast_test.cpp

@@ -4,7 +4,7 @@
 //
 //  Copyright Terje Sletteb and Kevlin Henney, 2005.
 //  Copyright Alexander Nasonov, 2006.
-//  Copyright Antony Polukhin, 2011-2012.
+//  Copyright Antony Polukhin, 2011-2026.
 //
 //  Distributed under the Boost
 //  Software License, Version 1.0. (See accompanying file
@@ -19,19 +19,9 @@
 //
 #define _SCL_SECURE_NO_WARNINGS
 
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
-
-#include <boost/lexical_cast.hpp>
-
 #include <boost/cstdint.hpp>
-#include <boost/test/unit_test.hpp>
-#include <boost/test/floating_point_comparison.hpp>
+
+#include <boost/core/lightweight_test.hpp>
 
 #include <boost/type_traits/integral_promotion.hpp>
 #include <string>
@@ -39,6 +29,8 @@
 #include <algorithm> // std::transform
 #include <memory>
 
+#include <boost/lexical_cast.hpp>
+
 #if (defined(BOOST_HAS_LONG_LONG) || defined(BOOST_HAS_MS_INT64)) \
     && !(defined(BOOST_MSVC) && BOOST_MSVC < 1300)
 #define LCAST_TEST_LONGLONG
@@ -48,6 +40,11 @@
 #define BOOST_LCAST_NO_WCHAR_T
 #endif
 
+#ifndef BOOST_TEST_CLOSE_FRACTION
+// Naiive, but works for tests in this file 
+#define BOOST_TEST_CLOSE_FRACTION(x, y, eps) BOOST_TEST(x - y + eps <= eps * 2)
+#endif
+
 template<class CharT>
 struct my_traits : std::char_traits<CharT>
 {
@@ -66,131 +63,61 @@ struct my_allocator : std::allocator<CharT>
 
 using namespace boost;
 
-void test_conversion_to_char();
-void test_conversion_to_int();
-void test_conversion_to_double();
-void test_conversion_to_bool();
-void test_conversion_with_nonconst_char();
-void test_conversion_to_string();
-void test_conversion_from_to_wchar_t_alias();
-void test_conversion_from_wchar_t();
-void test_conversion_to_wchar_t();
-void test_conversion_from_wstring();
-void test_conversion_to_wstring();
-void test_bad_lexical_cast();
-void test_no_whitespace_stripping();
-void test_volatile_types_conversions();
-#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
-void test_traits();
-void test_wtraits();
-void test_allocator();
-void test_wallocator();
-#endif
-void test_char_types_conversions();
-void operators_overload_test();
-#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
-void test_char16_conversions();
-#endif
-#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
-void test_char32_conversions();
-#endif
-void test_getting_pointer_to_function();
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast unit test");
-    suite->add(BOOST_TEST_CASE(test_conversion_to_char));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_int));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_double));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_bool));
-    suite->add(BOOST_TEST_CASE(test_conversion_from_to_wchar_t_alias));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_string));
-    suite->add(BOOST_TEST_CASE(test_conversion_with_nonconst_char));
-#ifndef BOOST_LCAST_NO_WCHAR_T
-    suite->add(BOOST_TEST_CASE(test_conversion_from_wchar_t));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_wchar_t));
-    suite->add(BOOST_TEST_CASE(test_conversion_from_wstring));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_wstring));
-#endif
-    suite->add(BOOST_TEST_CASE(test_bad_lexical_cast));
-    suite->add(BOOST_TEST_CASE(test_no_whitespace_stripping));
-    suite->add(BOOST_TEST_CASE(test_volatile_types_conversions));
-#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
-    suite->add(BOOST_TEST_CASE(&test_traits));
-    suite->add(BOOST_TEST_CASE(&test_wtraits));
-    suite->add(BOOST_TEST_CASE(&test_allocator));
-    suite->add(BOOST_TEST_CASE(&test_wallocator));
-#endif
-
-    suite->add(BOOST_TEST_CASE(&test_char_types_conversions));
-    suite->add(BOOST_TEST_CASE(&operators_overload_test));
-#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
-    suite->add(BOOST_TEST_CASE(&test_char16_conversions));
-#endif
-#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
-    suite->add(BOOST_TEST_CASE(&test_char32_conversions));
-#endif
-    suite->add(BOOST_TEST_CASE(&test_getting_pointer_to_function));
-
-    return suite;
-}
-
 void test_conversion_to_char()
 {
-    BOOST_CHECK_EQUAL('A', lexical_cast<char>('A'));
-    BOOST_CHECK_EQUAL(' ', lexical_cast<char>(' '));
-    BOOST_CHECK_EQUAL('1', lexical_cast<char>(1));
-    BOOST_CHECK_EQUAL('0', lexical_cast<char>(0));
-    BOOST_CHECK_THROW(lexical_cast<char>(123), bad_lexical_cast);
-    BOOST_CHECK_EQUAL('1', lexical_cast<char>(1.0));
-    BOOST_CHECK_EQUAL('1', lexical_cast<char>(true));
-    BOOST_CHECK_EQUAL('0', lexical_cast<char>(false));
-    BOOST_CHECK_EQUAL('A', lexical_cast<char>("A"));
-    BOOST_CHECK_EQUAL(' ', lexical_cast<char>(" "));
-    BOOST_CHECK_THROW(lexical_cast<char>(""), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<char>("Test"), bad_lexical_cast);
-    BOOST_CHECK_EQUAL('A', lexical_cast<char>(std::string("A")));
-    BOOST_CHECK_EQUAL(' ', lexical_cast<char>(std::string(" ")));
-    BOOST_CHECK_THROW(
+    BOOST_TEST_EQ('A', lexical_cast<char>('A'));
+    BOOST_TEST_EQ(' ', lexical_cast<char>(' '));
+    BOOST_TEST_EQ('1', lexical_cast<char>(1));
+    BOOST_TEST_EQ('0', lexical_cast<char>(0));
+    BOOST_TEST_THROWS(lexical_cast<char>(123), bad_lexical_cast);
+    BOOST_TEST_EQ('1', lexical_cast<char>(1.0));
+    BOOST_TEST_EQ('1', lexical_cast<char>(true));
+    BOOST_TEST_EQ('0', lexical_cast<char>(false));
+    BOOST_TEST_EQ('A', lexical_cast<char>("A"));
+    BOOST_TEST_EQ(' ', lexical_cast<char>(" "));
+    BOOST_TEST_THROWS(lexical_cast<char>(""), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<char>("Test"), bad_lexical_cast);
+    BOOST_TEST_EQ('A', lexical_cast<char>(std::string("A")));
+    BOOST_TEST_EQ(' ', lexical_cast<char>(std::string(" ")));
+    BOOST_TEST_THROWS(
         lexical_cast<char>(std::string("")), bad_lexical_cast);
-    BOOST_CHECK_THROW(
+    BOOST_TEST_THROWS(
         lexical_cast<char>(std::string("Test")), bad_lexical_cast);
 }
 
 void test_conversion_to_int()
 {
-    BOOST_CHECK_EQUAL(1, lexical_cast<int>('1'));
-    BOOST_CHECK_EQUAL(0, lexical_cast<int>('0'));
-    BOOST_CHECK_THROW(lexical_cast<int>('A'), bad_lexical_cast);
-    BOOST_CHECK_EQUAL(1, lexical_cast<int>(1));
-    BOOST_CHECK_EQUAL(1, lexical_cast<int>(1.0));
+    BOOST_TEST_EQ(1, lexical_cast<int>('1'));
+    BOOST_TEST_EQ(0, lexical_cast<int>('0'));
+    BOOST_TEST_THROWS(lexical_cast<int>('A'), bad_lexical_cast);
+    BOOST_TEST_EQ(1, lexical_cast<int>(1));
+    BOOST_TEST_EQ(1, lexical_cast<int>(1.0));
 
-    BOOST_CHECK_EQUAL(
+    BOOST_TEST_EQ(
         (std::numeric_limits<int>::max)(),
         lexical_cast<int>((std::numeric_limits<int>::max)()));
 
-    BOOST_CHECK_EQUAL(
+    BOOST_TEST_EQ(
         (std::numeric_limits<int>::min)(),
         lexical_cast<int>((std::numeric_limits<int>::min)()));
 
-    BOOST_CHECK_THROW(lexical_cast<int>(1.23), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<int>(1.23), bad_lexical_cast);
 
-    BOOST_CHECK_THROW(lexical_cast<int>(1e20), bad_lexical_cast);
-    BOOST_CHECK_EQUAL(1, lexical_cast<int>(true));
-    BOOST_CHECK_EQUAL(0, lexical_cast<int>(false));
-    BOOST_CHECK_EQUAL(123, lexical_cast<int>("123"));
-    BOOST_CHECK_THROW(
+    BOOST_TEST_THROWS(lexical_cast<int>(1e20), bad_lexical_cast);
+    BOOST_TEST_EQ(1, lexical_cast<int>(true));
+    BOOST_TEST_EQ(0, lexical_cast<int>(false));
+    BOOST_TEST_EQ(123, lexical_cast<int>("123"));
+    BOOST_TEST_THROWS(
         lexical_cast<int>(" 123"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<int>(""), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<int>("Test"), bad_lexical_cast);
-    BOOST_CHECK_EQUAL(123, lexical_cast<int>("123"));
-    BOOST_CHECK_EQUAL(123, lexical_cast<int>(std::string("123")));
-    BOOST_CHECK_THROW(
+    BOOST_TEST_THROWS(lexical_cast<int>(""), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<int>("Test"), bad_lexical_cast);
+    BOOST_TEST_EQ(123, lexical_cast<int>("123"));
+    BOOST_TEST_EQ(123, lexical_cast<int>(std::string("123")));
+    BOOST_TEST_THROWS(
         lexical_cast<int>(std::string(" 123")), bad_lexical_cast);
-    BOOST_CHECK_THROW(
+    BOOST_TEST_THROWS(
         lexical_cast<int>(std::string("")), bad_lexical_cast);
-    BOOST_CHECK_THROW(
+    BOOST_TEST_THROWS(
         lexical_cast<int>(std::string("Test")), bad_lexical_cast);
 }
 
@@ -199,222 +126,222 @@ void test_conversion_with_nonconst_char()
     std::vector<char> buffer;
     buffer.push_back('1');
     buffer.push_back('\0');
-    BOOST_CHECK_EQUAL(boost::lexical_cast<int>(&buffer[0]), 1);
+    BOOST_TEST_EQ(boost::lexical_cast<int>(&buffer[0]), 1);
 
     std::vector<unsigned char> buffer2;
     buffer2.push_back('1');
     buffer2.push_back('\0');
-    BOOST_CHECK_EQUAL(boost::lexical_cast<int>(&buffer2[0]), 1);
+    BOOST_TEST_EQ(boost::lexical_cast<int>(&buffer2[0]), 1);
 
     std::vector<unsigned char> buffer3;
     buffer3.push_back('1');
     buffer3.push_back('\0');
-    BOOST_CHECK_EQUAL(boost::lexical_cast<int>(&buffer3[0]), 1);
+    BOOST_TEST_EQ(boost::lexical_cast<int>(&buffer3[0]), 1);
 
 #ifndef BOOST_LCAST_NO_WCHAR_T
     std::vector<wchar_t> buffer4;
     buffer4.push_back(L'1');
     buffer4.push_back(L'\0');
-    BOOST_CHECK_EQUAL(boost::lexical_cast<int>(&buffer4[0]), 1);
+    BOOST_TEST_EQ(boost::lexical_cast<int>(&buffer4[0]), 1);
 #endif
 }
 
 void test_conversion_to_double()
 {
-    BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<double>('1'), (std::numeric_limits<double>::epsilon()));
-    BOOST_CHECK_THROW(lexical_cast<double>('A'), bad_lexical_cast);
-    BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<double>(1), (std::numeric_limits<double>::epsilon()));
-    BOOST_CHECK_CLOSE_FRACTION(1.23, lexical_cast<double>(1.23), (std::numeric_limits<double>::epsilon()));
-    BOOST_CHECK_CLOSE_FRACTION(1.234567890, lexical_cast<double>(1.234567890), std::numeric_limits<double>::epsilon());
-    BOOST_CHECK_CLOSE_FRACTION(1.234567890, lexical_cast<double>("1.234567890"), std::numeric_limits<double>::epsilon());
-    BOOST_CHECK_CLOSE_FRACTION(1.0, lexical_cast<double>(true), (std::numeric_limits<double>::epsilon()));
-    BOOST_CHECK_CLOSE_FRACTION(0.0, lexical_cast<double>(false), (std::numeric_limits<double>::epsilon()));
-    BOOST_CHECK_CLOSE_FRACTION(1.23, lexical_cast<double>("1.23"), (std::numeric_limits<double>::epsilon()));
-    BOOST_CHECK_THROW(lexical_cast<double>(""), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<double>("Test"), bad_lexical_cast);
-    BOOST_CHECK_CLOSE_FRACTION(1.23, lexical_cast<double>(std::string("1.23")), (std::numeric_limits<double>::epsilon()));
-    BOOST_CHECK_THROW(
+    BOOST_TEST_CLOSE_FRACTION(1.0, lexical_cast<double>('1'), (std::numeric_limits<double>::epsilon()));
+    BOOST_TEST_THROWS(lexical_cast<double>('A'), bad_lexical_cast);
+    BOOST_TEST_CLOSE_FRACTION(1.0, lexical_cast<double>(1), (std::numeric_limits<double>::epsilon()));
+    BOOST_TEST_CLOSE_FRACTION(1.23, lexical_cast<double>(1.23), (std::numeric_limits<double>::epsilon()));
+    BOOST_TEST_CLOSE_FRACTION(1.234567890, lexical_cast<double>(1.234567890), std::numeric_limits<double>::epsilon());
+    BOOST_TEST_CLOSE_FRACTION(1.234567890, lexical_cast<double>("1.234567890"), std::numeric_limits<double>::epsilon());
+    BOOST_TEST_CLOSE_FRACTION(1.0, lexical_cast<double>(true), (std::numeric_limits<double>::epsilon()));
+    BOOST_TEST_CLOSE_FRACTION(0.0, lexical_cast<double>(false), (std::numeric_limits<double>::epsilon()));
+    BOOST_TEST_CLOSE_FRACTION(1.23, lexical_cast<double>("1.23"), (std::numeric_limits<double>::epsilon()));
+    BOOST_TEST_THROWS(lexical_cast<double>(""), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<double>("Test"), bad_lexical_cast);
+    BOOST_TEST_CLOSE_FRACTION(1.23, lexical_cast<double>(std::string("1.23")), (std::numeric_limits<double>::epsilon()));
+    BOOST_TEST_THROWS(
         lexical_cast<double>(std::string("")), bad_lexical_cast);
-    BOOST_CHECK_THROW(
+    BOOST_TEST_THROWS(
         lexical_cast<double>(std::string("Test")), bad_lexical_cast);
 }
 
 void test_conversion_to_bool()
 {
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>('1'));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>('0'));
-    BOOST_CHECK_THROW(lexical_cast<bool>('A'), bad_lexical_cast);
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(1));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(0));
-    BOOST_CHECK_THROW(lexical_cast<bool>(123), bad_lexical_cast);
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(1.0));
-    BOOST_CHECK_THROW(lexical_cast<bool>(-123), bad_lexical_cast);
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(0.0));
-    BOOST_CHECK_THROW(lexical_cast<bool>(1234), bad_lexical_cast);
+    BOOST_TEST_EQ(true, lexical_cast<bool>('1'));
+    BOOST_TEST_EQ(false, lexical_cast<bool>('0'));
+    BOOST_TEST_THROWS(lexical_cast<bool>('A'), bad_lexical_cast);
+    BOOST_TEST_EQ(true, lexical_cast<bool>(1));
+    BOOST_TEST_EQ(false, lexical_cast<bool>(0));
+    BOOST_TEST_THROWS(lexical_cast<bool>(123), bad_lexical_cast);
+    BOOST_TEST_EQ(true, lexical_cast<bool>(1.0));
+    BOOST_TEST_THROWS(lexical_cast<bool>(-123), bad_lexical_cast);
+    BOOST_TEST_EQ(false, lexical_cast<bool>(0.0));
+    BOOST_TEST_THROWS(lexical_cast<bool>(1234), bad_lexical_cast);
 #if !defined(_CRAYC)
     // Looks like a bug in CRAY compiler (throws bad_lexical_cast)
     // TODO: localize the bug and report it to developers.
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(true));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(false));
+    BOOST_TEST_EQ(true, lexical_cast<bool>(true));
+    BOOST_TEST_EQ(false, lexical_cast<bool>(false));
 #endif
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>("1"));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>("0"));
-    BOOST_CHECK_THROW(lexical_cast<bool>(""), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("Test"), bad_lexical_cast);
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>("1"));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>("0"));
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(std::string("1")));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(std::string("0")));
+    BOOST_TEST_EQ(true, lexical_cast<bool>("1"));
+    BOOST_TEST_EQ(false, lexical_cast<bool>("0"));
+    BOOST_TEST_THROWS(lexical_cast<bool>(""), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("Test"), bad_lexical_cast);
+    BOOST_TEST_EQ(true, lexical_cast<bool>("1"));
+    BOOST_TEST_EQ(false, lexical_cast<bool>("0"));
+    BOOST_TEST_EQ(true, lexical_cast<bool>(std::string("1")));
+    BOOST_TEST_EQ(false, lexical_cast<bool>(std::string("0")));
 
-    BOOST_CHECK_THROW(lexical_cast<bool>(1.0001L), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>(2), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>(2u), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>(-1), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>(-2), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>(1.0001L), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>(2), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>(2u), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>(-1), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>(-2), bad_lexical_cast);
 
 
-    BOOST_CHECK_THROW(
+    BOOST_TEST_THROWS(
         lexical_cast<bool>(std::string("")), bad_lexical_cast);
-    BOOST_CHECK_THROW(
+    BOOST_TEST_THROWS(
         lexical_cast<bool>(std::string("Test")), bad_lexical_cast);
 
-    BOOST_CHECK(lexical_cast<bool>("+1") == true);
-    BOOST_CHECK(lexical_cast<bool>("+0") == false);
-    BOOST_CHECK(lexical_cast<bool>("-0") == false);
-    BOOST_CHECK_THROW(lexical_cast<bool>("--0"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("-+-0"), bad_lexical_cast);
+    BOOST_TEST(lexical_cast<bool>("+1") == true);
+    BOOST_TEST(lexical_cast<bool>("+0") == false);
+    BOOST_TEST(lexical_cast<bool>("-0") == false);
+    BOOST_TEST_THROWS(lexical_cast<bool>("--0"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("-+-0"), bad_lexical_cast);
 
-    BOOST_CHECK(lexical_cast<bool>("0") == false);
-    BOOST_CHECK(lexical_cast<bool>("1") == true);
-    BOOST_CHECK(lexical_cast<bool>("00") == false);
-    BOOST_CHECK(lexical_cast<bool>("00000000000") == false);
-    BOOST_CHECK(lexical_cast<bool>("000000000001") == true);
-    BOOST_CHECK(lexical_cast<bool>("+00") == false );
-    BOOST_CHECK(lexical_cast<bool>("-00") == false );
-    BOOST_CHECK(lexical_cast<bool>("+00000000001") == true );
+    BOOST_TEST(lexical_cast<bool>("0") == false);
+    BOOST_TEST(lexical_cast<bool>("1") == true);
+    BOOST_TEST(lexical_cast<bool>("00") == false);
+    BOOST_TEST(lexical_cast<bool>("00000000000") == false);
+    BOOST_TEST(lexical_cast<bool>("000000000001") == true);
+    BOOST_TEST(lexical_cast<bool>("+00") == false );
+    BOOST_TEST(lexical_cast<bool>("-00") == false );
+    BOOST_TEST(lexical_cast<bool>("+00000000001") == true );
 
-    BOOST_CHECK_THROW(lexical_cast<bool>("020"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("00200"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("-00200"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("+00200"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("000000000002"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("-1"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("-0000000001"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("00000000011"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("001001"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("-00000000010"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("-000000000100"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("020"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("00200"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("-00200"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("+00200"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("000000000002"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("-1"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("-0000000001"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("00000000011"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("001001"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("-00000000010"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>("-000000000100"), bad_lexical_cast);
 }
 
 void test_conversion_to_string()
 {
     char buf[] = "hello";
     char* str = buf;
-    BOOST_CHECK_EQUAL(str, lexical_cast<std::string>(str));
-    BOOST_CHECK_EQUAL("A", lexical_cast<std::string>('A'));
-    BOOST_CHECK_EQUAL(" ", lexical_cast<std::string>(' '));
-    BOOST_CHECK_EQUAL("123", lexical_cast<std::string>(123));
-    BOOST_CHECK_EQUAL("1.23", lexical_cast<std::string>(1.23));
-    BOOST_CHECK_EQUAL("1.111111111", lexical_cast<std::string>(1.111111111));
-    BOOST_CHECK_EQUAL("1", lexical_cast<std::string>(true));
-    BOOST_CHECK_EQUAL("0", lexical_cast<std::string>(false));
-    BOOST_CHECK_EQUAL("Test", lexical_cast<std::string>("Test"));
-    BOOST_CHECK_EQUAL(" ", lexical_cast<std::string>(" "));
-    BOOST_CHECK_EQUAL("", lexical_cast<std::string>(""));
-    BOOST_CHECK_EQUAL("Test", lexical_cast<std::string>(std::string("Test")));
-    BOOST_CHECK_EQUAL(" ", lexical_cast<std::string>(std::string(" ")));
-    BOOST_CHECK_EQUAL("", lexical_cast<std::string>(std::string("")));
+    BOOST_TEST_EQ(str, lexical_cast<std::string>(str));
+    BOOST_TEST_EQ("A", lexical_cast<std::string>('A'));
+    BOOST_TEST_EQ(" ", lexical_cast<std::string>(' '));
+    BOOST_TEST_EQ("123", lexical_cast<std::string>(123));
+    BOOST_TEST_EQ("1.23", lexical_cast<std::string>(1.23));
+    BOOST_TEST_EQ("1.111111111", lexical_cast<std::string>(1.111111111));
+    BOOST_TEST_EQ("1", lexical_cast<std::string>(true));
+    BOOST_TEST_EQ("0", lexical_cast<std::string>(false));
+    BOOST_TEST_EQ("Test", lexical_cast<std::string>("Test"));
+    BOOST_TEST_EQ(" ", lexical_cast<std::string>(" "));
+    BOOST_TEST_EQ("", lexical_cast<std::string>(""));
+    BOOST_TEST_EQ("Test", lexical_cast<std::string>(std::string("Test")));
+    BOOST_TEST_EQ(" ", lexical_cast<std::string>(std::string(" ")));
+    BOOST_TEST_EQ("", lexical_cast<std::string>(std::string("")));
 }
 
 void test_conversion_from_to_wchar_t_alias()
 {
-    BOOST_CHECK_EQUAL(123u, lexical_cast<unsigned short>("123"));
-    BOOST_CHECK_EQUAL(123u, lexical_cast<unsigned int>("123"));
-    BOOST_CHECK_EQUAL(123u, lexical_cast<unsigned long>("123"));
-    BOOST_CHECK_EQUAL(std::string("123"),
+    BOOST_TEST_EQ(123u, lexical_cast<unsigned short>("123"));
+    BOOST_TEST_EQ(123u, lexical_cast<unsigned int>("123"));
+    BOOST_TEST_EQ(123u, lexical_cast<unsigned long>("123"));
+    BOOST_TEST_EQ(std::string("123"),
         lexical_cast<std::string>(static_cast<unsigned short>(123)));
-    BOOST_CHECK_EQUAL(std::string("123"), lexical_cast<std::string>(123u));
-    BOOST_CHECK_EQUAL(std::string("123"), lexical_cast<std::string>(123ul));
+    BOOST_TEST_EQ(std::string("123"), lexical_cast<std::string>(123u));
+    BOOST_TEST_EQ(std::string("123"), lexical_cast<std::string>(123ul));
 }
 
 void test_conversion_from_wchar_t()
 {
 #ifndef BOOST_LCAST_NO_WCHAR_T
 #if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
-    BOOST_CHECK_EQUAL(1, lexical_cast<int>(L'1'));
-    BOOST_CHECK_THROW(lexical_cast<int>(L'A'), bad_lexical_cast);
+    BOOST_TEST_EQ(1, lexical_cast<int>(L'1'));
+    BOOST_TEST_THROWS(lexical_cast<int>(L'A'), bad_lexical_cast);
 #endif
 
-    BOOST_CHECK_EQUAL(123, lexical_cast<int>(L"123"));
-    BOOST_CHECK_THROW(lexical_cast<int>(L""), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<int>(L"Test"), bad_lexical_cast);
+    BOOST_TEST_EQ(123, lexical_cast<int>(L"123"));
+    BOOST_TEST_THROWS(lexical_cast<int>(L""), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<int>(L"Test"), bad_lexical_cast);
 
 #if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
-    BOOST_CHECK_EQUAL(1.0, lexical_cast<double>(L'1'));
-    BOOST_CHECK_THROW(lexical_cast<double>(L'A'), bad_lexical_cast);
+    BOOST_TEST_EQ(1.0, lexical_cast<double>(L'1'));
+    BOOST_TEST_THROWS(lexical_cast<double>(L'A'), bad_lexical_cast);
 #endif
 
-    BOOST_CHECK_EQUAL(1.23, lexical_cast<double>(L"1.23"));
-    BOOST_CHECK_THROW(lexical_cast<double>(L""), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<double>(L"Test"), bad_lexical_cast);
+    BOOST_TEST_EQ(1.23, lexical_cast<double>(L"1.23"));
+    BOOST_TEST_THROWS(lexical_cast<double>(L""), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<double>(L"Test"), bad_lexical_cast);
 
 #if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(L'1'));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(L'0'));
-    BOOST_CHECK_THROW(lexical_cast<bool>(L'A'), bad_lexical_cast);
+    BOOST_TEST_EQ(true, lexical_cast<bool>(L'1'));
+    BOOST_TEST_EQ(false, lexical_cast<bool>(L'0'));
+    BOOST_TEST_THROWS(lexical_cast<bool>(L'A'), bad_lexical_cast);
 #endif
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(L"1"));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(L"0"));
-    BOOST_CHECK_THROW(lexical_cast<bool>(L""), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>(L"Test"), bad_lexical_cast);
+    BOOST_TEST_EQ(true, lexical_cast<bool>(L"1"));
+    BOOST_TEST_EQ(false, lexical_cast<bool>(L"0"));
+    BOOST_TEST_THROWS(lexical_cast<bool>(L""), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<bool>(L"Test"), bad_lexical_cast);
 #endif
 }
 
 void test_conversion_to_wchar_t()
 {
 #if !defined(BOOST_LCAST_NO_WCHAR_T) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
-    BOOST_CHECK_EQUAL(L'1', lexical_cast<wchar_t>(1));
-    BOOST_CHECK_EQUAL(L'0', lexical_cast<wchar_t>(0));
-    BOOST_CHECK_EQUAL(L'1', lexical_cast<wchar_t>('1'));
-    BOOST_CHECK_EQUAL(L'0', lexical_cast<wchar_t>('0'));
-    BOOST_CHECK_THROW(lexical_cast<wchar_t>(123), bad_lexical_cast);
-    BOOST_CHECK_EQUAL(L'1', lexical_cast<wchar_t>(1.0));
-    BOOST_CHECK_EQUAL(L'0', lexical_cast<wchar_t>(0.0));
-    BOOST_CHECK_EQUAL(L'1', lexical_cast<wchar_t>(true));
-    BOOST_CHECK_EQUAL(L'0', lexical_cast<wchar_t>(false));
-    BOOST_CHECK_EQUAL(L'A', lexical_cast<wchar_t>(L'A'));
-    BOOST_CHECK_EQUAL(L' ', lexical_cast<wchar_t>(L' '));
-    BOOST_CHECK_EQUAL(L'A', lexical_cast<wchar_t>(L"A"));
-    BOOST_CHECK_EQUAL(L' ', lexical_cast<wchar_t>(L" "));
-    BOOST_CHECK_THROW(lexical_cast<wchar_t>(L""), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<wchar_t>(L"Test"), bad_lexical_cast);
-    BOOST_CHECK_EQUAL(L'A', lexical_cast<wchar_t>(std::wstring(L"A")));
-    BOOST_CHECK_EQUAL(L' ', lexical_cast<wchar_t>(std::wstring(L" ")));
-    BOOST_CHECK_THROW(
+    BOOST_TEST(L'1' == lexical_cast<wchar_t>(1));
+    BOOST_TEST(L'0' == lexical_cast<wchar_t>(0));
+    BOOST_TEST(L'1' == lexical_cast<wchar_t>('1'));
+    BOOST_TEST(L'0' == lexical_cast<wchar_t>('0'));
+    BOOST_TEST_THROWS(lexical_cast<wchar_t>(123), bad_lexical_cast);
+    BOOST_TEST(L'1' == lexical_cast<wchar_t>(1.0));
+    BOOST_TEST(L'0' == lexical_cast<wchar_t>(0.0));
+    BOOST_TEST(L'1' == lexical_cast<wchar_t>(true));
+    BOOST_TEST(L'0' == lexical_cast<wchar_t>(false));
+    BOOST_TEST(L'A' == lexical_cast<wchar_t>(L'A'));
+    BOOST_TEST(L' ' == lexical_cast<wchar_t>(L' '));
+    BOOST_TEST(L'A' == lexical_cast<wchar_t>(L"A"));
+    BOOST_TEST(L' ' == lexical_cast<wchar_t>(L" "));
+    BOOST_TEST_THROWS(lexical_cast<wchar_t>(L""), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<wchar_t>(L"Test"), bad_lexical_cast);
+    BOOST_TEST(L'A' == lexical_cast<wchar_t>(std::wstring(L"A")));
+    BOOST_TEST(L' ' == lexical_cast<wchar_t>(std::wstring(L" ")));
+    BOOST_TEST_THROWS(
         lexical_cast<wchar_t>(std::wstring(L"")), bad_lexical_cast);
-    BOOST_CHECK_THROW(
+    BOOST_TEST_THROWS(
         lexical_cast<wchar_t>(std::wstring(L"Test")), bad_lexical_cast);
 #endif
-    BOOST_CHECK(true);
+    BOOST_TEST(true);
 }
 
 void test_conversion_from_wstring()
 {
 #ifndef BOOST_LCAST_NO_WCHAR_T
-    BOOST_CHECK_EQUAL(123, lexical_cast<int>(std::wstring(L"123")));
-    BOOST_CHECK_THROW(
+    BOOST_TEST_EQ(123, lexical_cast<int>(std::wstring(L"123")));
+    BOOST_TEST_THROWS(
         lexical_cast<int>(std::wstring(L"")), bad_lexical_cast);
-    BOOST_CHECK_THROW(
+    BOOST_TEST_THROWS(
         lexical_cast<int>(std::wstring(L"Test")), bad_lexical_cast);
 
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(std::wstring(L"1")));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(std::wstring(L"0")));
-    BOOST_CHECK_THROW(
+    BOOST_TEST_EQ(true, lexical_cast<bool>(std::wstring(L"1")));
+    BOOST_TEST_EQ(false, lexical_cast<bool>(std::wstring(L"0")));
+    BOOST_TEST_THROWS(
         lexical_cast<bool>(std::wstring(L"")), bad_lexical_cast);
-    BOOST_CHECK_THROW(
+    BOOST_TEST_THROWS(
         lexical_cast<bool>(std::wstring(L"Test")), bad_lexical_cast);
 #endif
-    BOOST_CHECK(true);
+    BOOST_TEST(true);
 }
 
 void test_conversion_to_wstring()
@@ -422,24 +349,24 @@ void test_conversion_to_wstring()
 #ifndef BOOST_LCAST_NO_WCHAR_T
     wchar_t buf[] = L"hello";
     wchar_t* str = buf;
-    BOOST_CHECK(str == lexical_cast<std::wstring>(str));
-    BOOST_CHECK(L"123" == lexical_cast<std::wstring>(123));
-    BOOST_CHECK(L"1.23" == lexical_cast<std::wstring>(1.23));
-    BOOST_CHECK(L"1" == lexical_cast<std::wstring>(true));
-    BOOST_CHECK(L"0" == lexical_cast<std::wstring>(false));
+    BOOST_TEST(str == lexical_cast<std::wstring>(str));
+    BOOST_TEST(L"123" == lexical_cast<std::wstring>(123));
+    BOOST_TEST(L"1.23" == lexical_cast<std::wstring>(1.23));
+    BOOST_TEST(L"1" == lexical_cast<std::wstring>(true));
+    BOOST_TEST(L"0" == lexical_cast<std::wstring>(false));
 #if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
-    BOOST_CHECK(L"A" == lexical_cast<std::wstring>(L'A'));
-    BOOST_CHECK(L" " == lexical_cast<std::wstring>(L' '));
-    BOOST_CHECK(L"A" == lexical_cast<std::wstring>('A'));
+    BOOST_TEST(L"A" == lexical_cast<std::wstring>(L'A'));
+    BOOST_TEST(L" " == lexical_cast<std::wstring>(L' '));
+    BOOST_TEST(L"A" == lexical_cast<std::wstring>('A'));
 #endif
-    BOOST_CHECK(L"Test" == lexical_cast<std::wstring>(L"Test"));
-    BOOST_CHECK(L" " == lexical_cast<std::wstring>(L" "));
-    BOOST_CHECK(L"" == lexical_cast<std::wstring>(L""));
-    BOOST_CHECK(L"Test" == lexical_cast<std::wstring>(std::wstring(L"Test")));
-    BOOST_CHECK(L" " == lexical_cast<std::wstring>(std::wstring(L" ")));
-    BOOST_CHECK(L"" == lexical_cast<std::wstring>(std::wstring(L"")));
+    BOOST_TEST(L"Test" == lexical_cast<std::wstring>(L"Test"));
+    BOOST_TEST(L" " == lexical_cast<std::wstring>(L" "));
+    BOOST_TEST(L"" == lexical_cast<std::wstring>(L""));
+    BOOST_TEST(L"Test" == lexical_cast<std::wstring>(std::wstring(L"Test")));
+    BOOST_TEST(L" " == lexical_cast<std::wstring>(std::wstring(L" ")));
+    BOOST_TEST(L"" == lexical_cast<std::wstring>(std::wstring(L"")));
 #endif
-    BOOST_CHECK(true);
+    BOOST_TEST(true);
 }
 
 void test_bad_lexical_cast()
@@ -448,42 +375,31 @@ void test_bad_lexical_cast()
     {
         lexical_cast<int>(std::string("Test"));
 
-        BOOST_CHECK(false); // Exception expected
+        BOOST_TEST(false); // Exception expected
     }
     catch(const bad_lexical_cast &e)
     {
-        BOOST_CHECK(e.source_type() == typeid(std::string));
-        BOOST_CHECK(e.target_type() == typeid(int));
+        BOOST_TEST(e.source_type() == typeid(std::string));
+        BOOST_TEST(e.target_type() == typeid(int));
     }
 }
 
 void test_no_whitespace_stripping()
 {
-    BOOST_CHECK_THROW(lexical_cast<int>(" 123"), bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<int>("123 "), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<int>(" 123"), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<int>("123 "), bad_lexical_cast);
 }
 
-void test_volatile_types_conversions()
-{
-    volatile int i1 = 100000;
-    BOOST_CHECK_EQUAL("100000", boost::lexical_cast<std::string>(i1));
-
-    volatile const int i2 = 100000;
-    BOOST_CHECK_EQUAL("100000", boost::lexical_cast<std::string>(i2));
-
-    volatile const long int i3 = 1000000;
-    BOOST_CHECK_EQUAL("1000000", boost::lexical_cast<std::string>(i3));
-}
-
-#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
 void test_traits()
 {
     typedef std::basic_string<char, my_traits<char> > my_string;
 
     my_string const s("s");
-    BOOST_CHECK(boost::lexical_cast<char>(s) == s[0]);
-    BOOST_CHECK(boost::lexical_cast<my_string>(s) == s);
-    BOOST_CHECK(boost::lexical_cast<my_string>(-1) == "-1");
+    BOOST_TEST(boost::lexical_cast<char>(s) == s[0]);
+    BOOST_TEST(boost::lexical_cast<my_string>(s) == s);
+    BOOST_TEST(boost::lexical_cast<my_string>(-1) == "-1");
+    BOOST_TEST(boost::lexical_cast<int>(my_string("42")) == 42);
+    BOOST_TEST(boost::lexical_cast<double>(my_string("1.0")) == 1.0);
 }
 
 void test_wtraits()
@@ -491,18 +407,18 @@ void test_wtraits()
     typedef std::basic_string<wchar_t, my_traits<wchar_t> > my_string;
 
     my_string const s(L"s");
-    BOOST_CHECK(boost::lexical_cast<wchar_t>(s) == s[0]);
-    BOOST_CHECK(boost::lexical_cast<my_string>(s) == s);
-    //BOOST_CHECK(boost::lexical_cast<my_string>(-1) == L"-1");
-    // Commented out because gcc 3.3 doesn't support this:
-    // basic_ostream<wchar_t, my_traits<wchar_t> > o; o << -1;
+    BOOST_TEST(boost::lexical_cast<wchar_t>(s) == s[0]);
+    BOOST_TEST(boost::lexical_cast<my_string>(s) == s);
+    BOOST_TEST(boost::lexical_cast<my_string>(-1) == L"-1");
+    BOOST_TEST(boost::lexical_cast<int>(my_string(L"42")) == 42);
+    BOOST_TEST(boost::lexical_cast<double>(my_string(L"1.0")) == 1.0);
 }
 
 void test_allocator()
 {
 // Following test cause compilation error on MSVC2012:
 // (Reason: cannot convert from 'std::_Wrap_alloc<_Alloc>' to 'const my_allocator<CharT>')
-// 
+//
 // MSVC developer is notified about this issue
 #if !defined(_MSC_VER) || (_MSC_VER < 1700)
     typedef std::basic_string< char
@@ -511,12 +427,12 @@ void test_allocator()
                              > my_string;
 
     my_string s("s");
-    BOOST_CHECK(boost::lexical_cast<char>(s) == s[0]);
-    BOOST_CHECK(boost::lexical_cast<std::string>(s) == "s");
-    BOOST_CHECK(boost::lexical_cast<my_string>(s) == s);
-    BOOST_CHECK(boost::lexical_cast<my_string>(1) == "1");
-    BOOST_CHECK(boost::lexical_cast<my_string>("s") == s);
-    BOOST_CHECK(boost::lexical_cast<my_string>(std::string("s")) == s);
+    BOOST_TEST(boost::lexical_cast<char>(s) == s[0]);
+    BOOST_TEST(boost::lexical_cast<std::string>(s) == "s");
+    BOOST_TEST(boost::lexical_cast<my_string>(s) == s);
+    BOOST_TEST(boost::lexical_cast<my_string>(1) == "1");
+    BOOST_TEST(boost::lexical_cast<my_string>("s") == s);
+    BOOST_TEST(boost::lexical_cast<my_string>(std::string("s")) == s);
 #endif
 }
 
@@ -524,7 +440,7 @@ void test_wallocator()
 {
 // Following test cause compilation error on MSVC2012:
 // (Reason: cannot convert from 'std::_Wrap_alloc<_Alloc>' to 'const my_allocator<CharT>')
-// 
+//
 // MSVC developer is notified about this issue
 #if !defined(_MSC_VER) || (_MSC_VER < 1700)
     typedef std::basic_string< wchar_t
@@ -533,17 +449,15 @@ void test_wallocator()
                              > my_string;
 
     my_string s(L"s");
-    BOOST_CHECK(boost::lexical_cast<wchar_t>(s) == s[0]);
-    BOOST_CHECK(boost::lexical_cast<std::wstring>(s) == L"s");
-    BOOST_CHECK(boost::lexical_cast<my_string>(s) == s);
-    BOOST_CHECK(boost::lexical_cast<my_string>(1) == L"1");
-    BOOST_CHECK(boost::lexical_cast<my_string>(L"s") == s);
-    BOOST_CHECK(boost::lexical_cast<my_string>(std::wstring(L"s")) == s);
+    BOOST_TEST(boost::lexical_cast<wchar_t>(s) == s[0]);
+    BOOST_TEST(boost::lexical_cast<std::wstring>(s) == L"s");
+    BOOST_TEST(boost::lexical_cast<my_string>(s) == s);
+    BOOST_TEST(boost::lexical_cast<my_string>(1) == L"1");
+    BOOST_TEST(boost::lexical_cast<my_string>(L"s") == s);
+    BOOST_TEST(boost::lexical_cast<my_string>(std::wstring(L"s")) == s);
 #endif
 }
 
-#endif
-
 
 void test_char_types_conversions()
 {
@@ -551,27 +465,27 @@ void test_char_types_conversions()
     const unsigned char uc_arr[]  = "Test array of chars";
     const signed char sc_arr[]    = "Test array of chars";
 
-    BOOST_CHECK(boost::lexical_cast<std::string>(c_arr) == std::string(c_arr));
-    BOOST_CHECK(boost::lexical_cast<std::string>(uc_arr) == std::string(c_arr));
-    BOOST_CHECK(boost::lexical_cast<std::string>(sc_arr) == std::string(c_arr));
+    BOOST_TEST(boost::lexical_cast<std::string>(c_arr) == std::string(c_arr));
+    BOOST_TEST(boost::lexical_cast<std::string>(uc_arr) == std::string(c_arr));
+    BOOST_TEST(boost::lexical_cast<std::string>(sc_arr) == std::string(c_arr));
 
-    BOOST_CHECK(boost::lexical_cast<char>(c_arr[0]) == c_arr[0]);
-    BOOST_CHECK(boost::lexical_cast<char>(uc_arr[0]) == c_arr[0]);
-    BOOST_CHECK(boost::lexical_cast<char>(sc_arr[0]) == c_arr[0]);
+    BOOST_TEST(boost::lexical_cast<char>(c_arr[0]) == c_arr[0]);
+    BOOST_TEST(boost::lexical_cast<char>(uc_arr[0]) == c_arr[0]);
+    BOOST_TEST(boost::lexical_cast<char>(sc_arr[0]) == c_arr[0]);
 
-    BOOST_CHECK(boost::lexical_cast<unsigned char>(c_arr[0]) == uc_arr[0]);
-    BOOST_CHECK(boost::lexical_cast<unsigned char>(uc_arr[0]) == uc_arr[0]);
-    BOOST_CHECK(boost::lexical_cast<unsigned char>(sc_arr[0]) == uc_arr[0]);
+    BOOST_TEST(boost::lexical_cast<unsigned char>(c_arr[0]) == uc_arr[0]);
+    BOOST_TEST(boost::lexical_cast<unsigned char>(uc_arr[0]) == uc_arr[0]);
+    BOOST_TEST(boost::lexical_cast<unsigned char>(sc_arr[0]) == uc_arr[0]);
 
-    BOOST_CHECK(boost::lexical_cast<signed char>(c_arr[0]) == sc_arr[0]);
-    BOOST_CHECK(boost::lexical_cast<signed char>(uc_arr[0]) == sc_arr[0]);
-    BOOST_CHECK(boost::lexical_cast<signed char>(sc_arr[0]) == sc_arr[0]);
+    BOOST_TEST(boost::lexical_cast<signed char>(c_arr[0]) == sc_arr[0]);
+    BOOST_TEST(boost::lexical_cast<signed char>(uc_arr[0]) == sc_arr[0]);
+    BOOST_TEST(boost::lexical_cast<signed char>(sc_arr[0]) == sc_arr[0]);
 
 #ifndef BOOST_LCAST_NO_WCHAR_T
     const wchar_t wc_arr[]=L"Test array of chars";
 
-    BOOST_CHECK(boost::lexical_cast<std::wstring>(wc_arr) == std::wstring(wc_arr));
-    BOOST_CHECK(boost::lexical_cast<wchar_t>(wc_arr[0]) == wc_arr[0]);
+    BOOST_TEST(boost::lexical_cast<std::wstring>(wc_arr) == std::wstring(wc_arr));
+    BOOST_TEST(boost::lexical_cast<wchar_t>(wc_arr[0]) == wc_arr[0]);
 
 #endif
 }
@@ -601,49 +515,87 @@ IStream& operator>>(IStream& istr, foo_operators_test& foo)
 void operators_overload_test()
 {
     foo_operators_test foo;
-    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(foo), "2");
-    BOOST_CHECK_EQUAL((boost::lexical_cast<foo_operators_test>("2")).f, 2);
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(foo), "2");
+    BOOST_TEST_EQ((boost::lexical_cast<foo_operators_test>("2")).f, 2);
 
     // Must compile
     (void)boost::lexical_cast<foo_operators_test>(foo);
 }
 
 
-#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
 void test_char16_conversions()
 {
-    BOOST_CHECK(u"100" == lexical_cast<std::u16string>(u"100"));
-    BOOST_CHECK(u"1" == lexical_cast<std::u16string>(u'1'));
-}
+// There's no std::ctype<char16_t> in Xcode_15.0.1
+#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(__APPLE__)
+    BOOST_TEST(u"100" == lexical_cast<std::u16string>(u"100"));
+#if !defined(_LIBCPP_VERSION) // libc++ also does not have std::ctype<char16_t>
+    BOOST_TEST(u"1" == lexical_cast<std::u16string>(u'1'));
 #endif
+#endif
+}
 
-#if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS)
 void test_char32_conversions()
 {
-    BOOST_CHECK(U"100" == lexical_cast<std::u32string>(U"100"));
-    BOOST_CHECK(U"1" == lexical_cast<std::u32string>(U'1'));
-}
+// There's no std::ctype<char32_t> in Xcode_15.0.1
+#if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(__APPLE__)
+    BOOST_TEST(U"100" == lexical_cast<std::u32string>(U"100"));
+#if !defined(_LIBCPP_VERSION) // libc++ also does not have std::ctype<char32_t>
+    BOOST_TEST(U"1" == lexical_cast<std::u32string>(U'1'));
 #endif
+#endif
+}
 
 void test_getting_pointer_to_function()
 {
     // Just checking that &lexical_cast<To, From> is not ambiguous
-    typedef char char_arr[4];    
+    typedef char char_arr[4];
     typedef int(*f1)(const char_arr&);
     f1 p1 = &boost::lexical_cast<int, char_arr>;
-    BOOST_CHECK(p1);
+    BOOST_TEST(p1);
 
     typedef int(*f2)(const std::string&);
     f2 p2 = &boost::lexical_cast<int, std::string>;
-    BOOST_CHECK(p2);
+    BOOST_TEST(p2);
 
     typedef std::string(*f3)(const int&);
     f3 p3 = &boost::lexical_cast<std::string, int>;
-    BOOST_CHECK(p3);
+    BOOST_TEST(p3);
 
     std::vector<int> values;
     std::vector<std::string> ret;
     std::transform(values.begin(), values.end(), ret.begin(), boost::lexical_cast<std::string, int>);
 }
 
+int main()
+{
+    test_conversion_to_char();
+    test_conversion_to_int();
+    test_conversion_to_double();
+    test_conversion_to_bool();
+    test_conversion_from_to_wchar_t_alias();
+    test_conversion_to_string();
+    test_conversion_with_nonconst_char();
+#ifndef BOOST_LCAST_NO_WCHAR_T
+    test_conversion_from_wchar_t();
+    test_conversion_to_wchar_t();
+    test_conversion_from_wstring();
+    test_conversion_to_wstring();
+#endif
+    test_bad_lexical_cast();
+    test_no_whitespace_stripping();
+
+    test_traits();
+    test_wtraits();
+    test_allocator();
+    test_wallocator();
+
+    test_char_types_conversions();
+    operators_overload_test();
+    test_char16_conversions();
+    test_char32_conversions();
+    test_getting_pointer_to_function();
+
+    return boost::report_errors();
+}
+
 

test/lexical_cast_try_lexical_convert.cpp

@@ -1,78 +0,0 @@
-//  Unit test for boost::lexical_cast.
-//
-//  See http://www.boost.org for most recent version, including documentation.
-//
-//  Copyright Antony Polukhin, 2014.
-//
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
-
-#include <boost/config.hpp>
-
-#include <boost/lexical_cast/try_lexical_convert.hpp>
-#include <boost/test/unit_test.hpp>
-
-using namespace boost::conversion;
-
-void try_uncommon_cases()
-{
-    std::string sres;
-    const bool res1 = try_lexical_convert(std::string("Test string"), sres);
-    BOOST_CHECK(res1);
-    BOOST_CHECK_EQUAL(sres, "Test string");
-
-    volatile int vires;
-    const bool res2 = try_lexical_convert(100, vires);
-    BOOST_CHECK(res2);
-    BOOST_CHECK_EQUAL(vires, 100);
-
-    const bool res3 = try_lexical_convert("Test string", sres);
-    BOOST_CHECK(res3);
-    BOOST_CHECK_EQUAL(sres, "Test string");
-
-    const bool res4 = try_lexical_convert("Test string", sizeof("Test string") - 1, sres);
-    BOOST_CHECK(res4);
-    BOOST_CHECK_EQUAL(sres, "Test string");
-
-    int ires;
-    BOOST_CHECK(!try_lexical_convert("Test string", ires));
-    BOOST_CHECK(!try_lexical_convert(1.1, ires));
-    BOOST_CHECK(!try_lexical_convert(-1.9, ires));
-    BOOST_CHECK(!try_lexical_convert("1.1", ires));
-    BOOST_CHECK(!try_lexical_convert("1000000000000000000000000000000000000000", ires));
-}
-
-
-void try_common_cases()
-{
-    int ires = 0;
-    const bool res1 = try_lexical_convert(std::string("100"), ires);
-    BOOST_CHECK(res1);
-    BOOST_CHECK_EQUAL(ires, 100);
-
-    ires = 0;
-    const bool res2 = try_lexical_convert("-100", ires);
-    BOOST_CHECK(res2);
-    BOOST_CHECK_EQUAL(ires, -100);
-
-    float fres = 1.0f;
-    const bool res3 = try_lexical_convert("0.0", fres);
-    BOOST_CHECK(res3);
-    BOOST_CHECK_EQUAL(fres, 0.0f);
-
-    fres = 1.0f;
-    const bool res4 = try_lexical_convert("0.0", sizeof("0.0") - 1, fres);
-    BOOST_CHECK(res4);
-    BOOST_CHECK_EQUAL(fres, 0.0f);
-}
-
-boost::unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    boost::unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("Tests for try_lexical_convert");
-    suite->add(BOOST_TEST_CASE(&try_uncommon_cases));
-    suite->add(BOOST_TEST_CASE(&try_common_cases));
-
-    return suite;
-}

test/lexical_cast_typedefed_wchar_test_runtime.cpp

@@ -1,48 +0,0 @@
-//  Unit test for boost::lexical_cast.
-//
-//  See http://www.boost.org for most recent version, including documentation.
-//
-//  Copyright Antony Polukhin, 2011.
-//
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
-
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
-
-#include <boost/lexical_cast.hpp>
-
-#include <boost/test/unit_test.hpp>
-using namespace boost;
-
-void test_typedefed_wchar_t_runtime()
-{
-#ifndef BOOST_LCAST_NO_WCHAR_T
-#ifdef BOOST_MSVC
-    BOOST_STATIC_ASSERT((boost::is_same<wchar_t, unsigned short>::value));
-
-
-    BOOST_CHECK_EQUAL(boost::lexical_cast<int>(L'A'), 65);
-    BOOST_CHECK_EQUAL(boost::lexical_cast<int>(L'B'), 66);
-
-    BOOST_CHECK_EQUAL(boost::lexical_cast<wchar_t>(L"65"), 65);
-    BOOST_CHECK_EQUAL(boost::lexical_cast<wchar_t>(L"66"), 66);
-#endif
-#endif
-    BOOST_CHECK(1);
-}
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast typedefed wchar_t runtime test");
-    suite->add(BOOST_TEST_CASE(&test_typedefed_wchar_t_runtime));
-
-    return suite;
-}

test/loopback_test.cpp

@@ -3,6 +3,7 @@
 //  See http://www.boost.org for most recent version, including documentation.
 //
 //  Copyright Alexander Nasonov, 2006.
+//  Copyright Antony Polukhin, 2023-2026.
 //
 //  Distributed under the Boost
 //  Software License, Version 1.0. (See accompanying file
@@ -11,56 +12,38 @@
 //  Test round-tripping conversion FPT -> string -> FPT,
 //  where FPT is Floating Point Type.
 
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
+#include <boost/core/lightweight_test.hpp>
 
 #include <boost/lexical_cast.hpp>
-#include <boost/test/unit_test.hpp>
 
-using namespace boost;
-
-void test_round_conversion_float();
-void test_round_conversion_double();
-void test_round_conversion_long_double();
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast unit test");
-    suite->add(BOOST_TEST_CASE(&test_round_conversion_float));
-    suite->add(BOOST_TEST_CASE(&test_round_conversion_double));
-    suite->add(BOOST_TEST_CASE(&test_round_conversion_long_double));
-
-    return suite;
-}
+#if (defined(__CYGWIN__) || defined(__FreeBSD__) || defined(__NetBSD__) \
+   || (defined(__hppa) && !defined(__OpenBSD__)) || (defined(__NO_LONG_DOUBLE_MATH) && (DBL_MANT_DIG != LDBL_MANT_DIG))) \
+   || defined(__MINGW64__)
+#  define BOOST_LEXICAL_CAST_NO_LONG_DOUBLE_MATH_FUNCTIONS
+#endif
 
 template<class T>
 void test_round_conversion()
 {
     T epsilon = std::numeric_limits<T>::epsilon();
     std::string const epsilon_s = boost::lexical_cast<std::string>(epsilon);
-    BOOST_CHECK(epsilon == lexical_cast<T>(epsilon_s));
+    BOOST_TEST(epsilon == boost::lexical_cast<T>(epsilon_s));
 
     T max_ = (std::numeric_limits<T>::max)();
     std::string const max_s = boost::lexical_cast<std::string>(max_);
-    BOOST_CHECK(max_ == lexical_cast<T>(max_s));
+    BOOST_TEST(max_ == boost::lexical_cast<T>(max_s));
 
     T min_ = (std::numeric_limits<T>::min)();
     std::string const min_s = boost::lexical_cast<std::string>(min_);
-    BOOST_CHECK(min_ == lexical_cast<T>(min_s));
+    BOOST_TEST(min_ == boost::lexical_cast<T>(min_s));
 
     T max_div137 = max_ / 137;
     std::string max_div137_s = boost::lexical_cast<std::string>(max_div137);
-    BOOST_CHECK(max_div137 == lexical_cast<T>(max_div137_s));
+    BOOST_TEST(max_div137 == boost::lexical_cast<T>(max_div137_s));
 
     T epsilon_mult137 = epsilon * 137;
-    std::string epsilon_mult137_s(lexical_cast<std::string>(epsilon_mult137));
-    BOOST_CHECK(epsilon_mult137 == lexical_cast<T>(epsilon_mult137_s));
+    std::string epsilon_mult137_s(boost::lexical_cast<std::string>(epsilon_mult137));
+    BOOST_TEST(epsilon_mult137 == boost::lexical_cast<T>(epsilon_mult137_s));
 
 }
 
@@ -70,7 +53,7 @@ void test_msvc_magic_values()
 {
     T magic_msvc = 0.00010000433948393407;
     std::string magic_msvc_s = boost::lexical_cast<std::string>(magic_msvc);
-    BOOST_CHECK(magic_msvc == lexical_cast<T>(magic_msvc_s));
+    BOOST_TEST(magic_msvc == boost::lexical_cast<T>(magic_msvc_s));
 }
 
 void test_round_conversion_float()
@@ -86,11 +69,20 @@ void test_round_conversion_double()
 
 void test_round_conversion_long_double()
 {
-// We do not run tests on compilers with bugs
-#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
+// We do not run tests on compilers and Standard Libraries with poor support of long double
+#if !defined(BOOST_LEXICAL_CAST_NO_LONG_DOUBLE_MATH_FUNCTIONS)
     test_round_conversion<long double>();
     test_msvc_magic_values<long double>();
 #endif
-    BOOST_CHECK(true);
+    BOOST_TEST(true);
+}
+
+int main()
+{
+    test_round_conversion_float();
+    test_round_conversion_double();
+    test_round_conversion_long_double();
+
+    return boost::report_errors();
 }
 

test/no_exceptions_test.cpp

@@ -0,0 +1,78 @@
+//  Unit test for boost::lexical_cast.
+//
+//  See http://www.boost.org for most recent version, including documentation.
+//
+//  Copyright Antony Polukhin, 2012-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+#include <boost/config.hpp>
+
+#if defined(__INTEL_COMPILER)
+#pragma warning(disable: 193 383 488 981 1418 1419)
+#elif defined(BOOST_MSVC)
+#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
+#endif
+
+#include <boost/core/lightweight_test.hpp>
+#include <boost/range/iterator_range.hpp>
+
+#include <cstdlib>
+
+#if defined(BOOST_USE_MODULES)
+#undef BOOST_USE_MODULES
+#endif
+#include <boost/lexical_cast.hpp>
+
+#include "escape_struct.hpp"
+
+#ifndef BOOST_NO_EXCEPTIONS
+#error "This test must be compiled with -DBOOST_NO_EXCEPTIONS"
+#endif
+
+namespace boost {
+
+BOOST_NORETURN void throw_exception(std::exception const & ) {
+    static int state = 0;
+    ++ state;
+
+    EscapeStruct v("");
+    switch(state) {
+    case 1:
+        lexical_cast<char>(v); // should call boost::throw_exception
+        std::exit(1);
+    case 2:
+        lexical_cast<unsigned char>(v); // should call boost::throw_exception
+        std::exit(2);
+    }
+    std::exit(boost::report_errors());
+}
+
+}
+
+void test_exceptions_off() {
+    using namespace boost;
+    EscapeStruct v("");
+
+    v = lexical_cast<EscapeStruct>(100);
+    BOOST_TEST_EQ(lexical_cast<int>(v), 100);
+    BOOST_TEST_EQ(lexical_cast<unsigned int>(v), 100u);
+
+    v = lexical_cast<EscapeStruct>(0.0);
+    BOOST_TEST_EQ(lexical_cast<double>(v), 0.0);
+
+    BOOST_TEST_EQ(lexical_cast<short>(100), 100);
+    BOOST_TEST_EQ(lexical_cast<float>(0.0), 0.0);
+
+    lexical_cast<short>(700000); // should call boost::throw_exception
+    BOOST_TEST(false);
+}
+
+int main() {
+    test_exceptions_off();
+
+    return boost::report_errors();
+}
+

test/no_locale_test.cpp

@@ -0,0 +1,143 @@
+//  Unit test for boost::lexical_cast.
+//
+//  See http://www.boost.org for most recent version, including documentation.
+//
+//  Copyright Antony Polukhin, 2012-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+#include <boost/core/lightweight_test.hpp>
+#include <boost/range/iterator_range.hpp>
+
+#include "escape_struct.hpp"
+
+#include <vector>
+
+#include <boost/lexical_cast.hpp>
+
+using namespace boost;
+
+// Testing compilation and some basic usage with BOOST_NO_STD_LOCALE
+// Tests are mainly copyied from empty_input_test.cpp (something
+// new added to test_empty_3)
+
+#ifndef BOOST_NO_STD_LOCALE
+#error "This test must be compiled with -DBOOST_NO_STD_LOCALE"
+#endif
+
+
+template <class T>
+void do_test_on_empty_input(T& v)
+{
+    BOOST_TEST_THROWS(lexical_cast<int>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<float>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<double>(v), bad_lexical_cast);
+#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
+    BOOST_TEST_THROWS(lexical_cast<long double>(v), bad_lexical_cast);
+#endif
+    BOOST_TEST_THROWS(lexical_cast<unsigned int>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned short>(v), bad_lexical_cast);
+#if defined(BOOST_HAS_LONG_LONG)
+    BOOST_TEST_THROWS(lexical_cast<boost::ulong_long_type>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<boost::long_long_type>(v), bad_lexical_cast);
+#elif defined(BOOST_HAS_MS_INT64)
+    BOOST_TEST_THROWS(lexical_cast<unsigned __int64>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<__int64>(v), bad_lexical_cast);
+#endif
+}
+
+void test_empty_1()
+{
+    boost::iterator_range<char*> v;
+    do_test_on_empty_input(v);
+    BOOST_TEST_EQ(lexical_cast<std::string>(v), std::string());
+    BOOST_TEST_THROWS(lexical_cast<char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<signed char>(v), bad_lexical_cast);
+
+    boost::iterator_range<const char*> cv;
+    do_test_on_empty_input(cv);
+    BOOST_TEST_EQ(lexical_cast<std::string>(cv), std::string());
+    BOOST_TEST_THROWS(lexical_cast<char>(cv), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned char>(cv), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<signed char>(cv), bad_lexical_cast);
+
+    const boost::iterator_range<const char*> ccv;
+    do_test_on_empty_input(ccv);
+    BOOST_TEST_EQ(lexical_cast<std::string>(ccv), std::string());
+    BOOST_TEST_THROWS(lexical_cast<char>(ccv), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned char>(ccv), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<signed char>(ccv), bad_lexical_cast);
+}
+
+void test_empty_2()
+{
+    std::string v;
+    do_test_on_empty_input(v);
+    BOOST_TEST_THROWS(lexical_cast<char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<signed char>(v), bad_lexical_cast);
+}
+
+void test_empty_3()
+{
+    EscapeStruct v("");
+    do_test_on_empty_input(v);
+
+    BOOST_TEST_THROWS(lexical_cast<char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<signed char>(v), bad_lexical_cast);
+
+    v = lexical_cast<EscapeStruct>(100);
+    BOOST_TEST_EQ(lexical_cast<int>(v), 100);
+    BOOST_TEST_EQ(lexical_cast<unsigned int>(v), 100u);
+
+    v = lexical_cast<EscapeStruct>(0.0);
+    BOOST_TEST_EQ(lexical_cast<double>(v), 0.0);
+}
+
+namespace std {
+inline std::ostream & operator<<(std::ostream & out, const std::vector<long> & v)
+{
+    std::ostream_iterator<long> it(out);
+    std::copy(v.begin(), v.end(), it);
+    BOOST_TEST(out);
+    return out;
+}
+}
+
+void test_empty_4()
+{
+    std::vector<long> v;
+    do_test_on_empty_input(v);
+    BOOST_TEST_THROWS(lexical_cast<char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<unsigned char>(v), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<signed char>(v), bad_lexical_cast);
+}
+
+
+struct my_string {
+    friend std::ostream &operator<<(std::ostream& sout, my_string const&/* st*/) {
+            return sout << "";
+    }
+};
+
+void test_empty_5()
+{
+    my_string st;
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(st), std::string());;
+}
+
+int main()
+{
+    test_empty_1();
+    test_empty_2();
+    test_empty_3();
+    test_empty_4();
+    test_empty_5();
+
+    return boost::report_errors();
+}
+

test/noncopyable_test.cpp

@@ -3,6 +3,7 @@
 //  See http://www.boost.org for most recent version, including documentation.
 //
 //  Copyright Alexander Nasonov, 2007.
+//  Copyright Antony Polukhin, 2023-2026.
 //
 //  Distributed under the Boost
 //  Software License, Version 1.0. (See accompanying file
@@ -10,30 +11,11 @@
 //
 //  Test that Source can be non-copyable.
 
-#include <boost/config.hpp>
+#include <boost/core/noncopyable.hpp>
 
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
+#include <boost/core/lightweight_test.hpp>
 
 #include <boost/lexical_cast.hpp>
-#include <boost/noncopyable.hpp>
-#include <boost/test/unit_test.hpp>
-
-using namespace boost;
-
-void test_noncopyable();
-
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast unit test");
-    suite->add(BOOST_TEST_CASE(&test_noncopyable));
-
-    return suite;
-}
 
 class Noncopyable : private boost::noncopyable
 {
@@ -49,6 +31,11 @@ inline std::ostream &operator<<(std::ostream &out, const Noncopyable&)
 void test_noncopyable()
 {
     Noncopyable x;
-    BOOST_CHECK(boost::lexical_cast<std::string>(x) == "Noncopyable");
+    BOOST_TEST(boost::lexical_cast<std::string>(x) == "Noncopyable");
 }
 
+int main()
+{
+    test_noncopyable();
+    return boost::report_errors();
+}

test/pointers_test.cpp

@@ -2,24 +2,17 @@
 //
 //  See http://www.boost.org for most recent version, including documentation.
 //
-//  Copyright Antony Polukhin, 2012.
+//  Copyright Antony Polukhin, 2012-2026.
 //
 //  Distributed under the Boost
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
 
-#include <boost/config.hpp>
+#include <boost/core/lightweight_test.hpp>
 
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
+#include <sstream>
 
 #include <boost/lexical_cast.hpp>
-#include <boost/test/unit_test.hpp>
-
-using namespace boost;
 
 #if defined(BOOST_NO_STRINGSTREAM)
             typedef std::strstream ss_t;
@@ -36,15 +29,15 @@ void test_void_pointers_conversions()
     ss_t ss;
 
     ss << p_to_null;
-    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(p_to_null), ss.str());
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(p_to_null), ss.str());
     ss.str(std::string());
 
     ss << cp_to_data;
-    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(cp_to_data), ss.str());
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(cp_to_data), ss.str());
     ss.str(std::string());
 
     ss << p_to_data;
-    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(p_to_data), ss.str());
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(p_to_data), ss.str());
     ss.str(std::string());
 }
 
@@ -59,15 +52,15 @@ void test_incomplete_type_pointers_conversions()
     ss_t ss;
 
     ss << p_to_null;
-    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(p_to_null), ss.str());
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(p_to_null), ss.str());
     ss.str(std::string());
 
     ss << cp_to_data;
-    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(cp_to_data), ss.str());
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(cp_to_data), ss.str());
     ss.str(std::string());
 
     ss << p_to_data;
-    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(p_to_data), ss.str());
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(p_to_data), ss.str());
     ss.str(std::string());
 }
 
@@ -82,15 +75,14 @@ void test_inomplete_type_with_overloaded_ostream_op() {
     meh heh = NULL;
     ss_t ss;
     ss << heh;
-    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(heh), ss.str());
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(heh), ss.str());
 }
 
-unit_test::test_suite *init_unit_test_suite(int, char *[])
+int main()
 {
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast pinters test");
-    suite->add(BOOST_TEST_CASE(&test_void_pointers_conversions));
-    suite->add(BOOST_TEST_CASE(&test_incomplete_type_pointers_conversions));
-    suite->add(BOOST_TEST_CASE(&test_inomplete_type_with_overloaded_ostream_op));
-    return suite;
+    test_void_pointers_conversions();
+    test_incomplete_type_pointers_conversions();
+    test_inomplete_type_with_overloaded_ostream_op();
+
+    return boost::report_errors();
 }

test/stream_detection_test.cpp

@@ -2,19 +2,18 @@
 //
 //  See http://www.boost.org for most recent version, including documentation.
 //
-//  Copyright Antony Polukhin, 2011-2012.
+//  Copyright Antony Polukhin, 2011-2026.
 //
 //  Distributed under the Boost
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
 
-
-#include <boost/config.hpp>
-#include <boost/test/unit_test.hpp>
-
-#include <boost/lexical_cast.hpp>
+#include <boost/core/lightweight_test.hpp>
 
 #include <iostream>
+#include <type_traits>
+
+#include <boost/lexical_cast.hpp>
 
 
 ///////////////////////// char streamable classes ///////////////////////////////////////////
@@ -24,33 +23,33 @@ std::ostream& operator << (std::ostream& ostr, const streamable_easy&) {
     return ostr << streamable_easy::value;
 }
 std::istream& operator >> (std::istream& istr, const streamable_easy&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, streamable_easy::value);
+    int i; istr >> i; BOOST_TEST_EQ(i, streamable_easy::value);
     return istr;
 }
 
 struct streamable_medium { enum ENU {value = 1}; };
 template <class CharT>
-typename boost::enable_if<boost::is_same<CharT, char>, std::basic_ostream<CharT>&>::type 
+typename std::enable_if<std::is_same<CharT, char>::value, std::basic_ostream<CharT>&>::type
 operator << (std::basic_ostream<CharT>& ostr, const streamable_medium&) {
     return ostr << streamable_medium::value;
 }
 template <class CharT>
-typename boost::enable_if<boost::is_same<CharT, char>, std::basic_istream<CharT>&>::type 
+typename std::enable_if<std::is_same<CharT, char>::value, std::basic_istream<CharT>&>::type
 operator >> (std::basic_istream<CharT>& istr, const streamable_medium&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, streamable_medium::value);
+    int i; istr >> i; BOOST_TEST_EQ(i, streamable_medium::value);
     return istr;
 }
 
 struct streamable_hard { enum ENU {value = 2}; };
 template <class CharT, class TraitsT>
-typename boost::enable_if<boost::is_same<CharT, char>, std::basic_ostream<CharT, TraitsT>&>::type 
+typename std::enable_if<std::is_same<CharT, char>::value, std::basic_ostream<CharT, TraitsT>&>::type
 operator << (std::basic_ostream<CharT, TraitsT>& ostr, const streamable_hard&) {
     return ostr << streamable_hard::value;
 }
 template <class CharT, class TraitsT>
-typename boost::enable_if<boost::is_same<CharT, char>, std::basic_istream<CharT, TraitsT>&>::type 
+typename std::enable_if<std::is_same<CharT, char>::value, std::basic_istream<CharT, TraitsT>&>::type
 operator >> (std::basic_istream<CharT, TraitsT>& istr, const streamable_hard&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, streamable_hard::value);
+    int i; istr >> i; BOOST_TEST_EQ(i, streamable_hard::value);
     return istr;
 }
 
@@ -61,7 +60,7 @@ std::basic_ostream<char, TraitsT>& operator << (std::basic_ostream<char, TraitsT
 }
 template <class TraitsT>
 std::basic_istream<char, TraitsT>& operator >> (std::basic_istream<char, TraitsT>& istr, const streamable_hard2&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, streamable_hard2::value);
+    int i; istr >> i; BOOST_TEST_EQ(i, streamable_hard2::value);
     return istr;
 }
 
@@ -73,33 +72,33 @@ std::wostream& operator << (std::wostream& ostr, const wstreamable_easy&) {
     return ostr << wstreamable_easy::value;
 }
 std::wistream& operator >> (std::wistream& istr, const wstreamable_easy&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, wstreamable_easy::value);
+    int i; istr >> i; BOOST_TEST_EQ(i, wstreamable_easy::value);
     return istr;
 }
 
 struct wstreamable_medium { enum ENU {value = 5}; };
 template <class CharT>
-typename boost::enable_if<boost::is_same<CharT, wchar_t>, std::basic_ostream<CharT>& >::type 
+typename std::enable_if<std::is_same<CharT, wchar_t>::value, std::basic_ostream<CharT>& >::type
 operator << (std::basic_ostream<CharT>& ostr, const wstreamable_medium&) {
     return ostr << wstreamable_medium::value;
 }
 template <class CharT>
-typename boost::enable_if<boost::is_same<CharT, wchar_t>, std::basic_istream<CharT>& >::type 
+typename std::enable_if<std::is_same<CharT, wchar_t>::value, std::basic_istream<CharT>& >::type
 operator >> (std::basic_istream<CharT>& istr, const wstreamable_medium&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, wstreamable_medium::value);
+    int i; istr >> i; BOOST_TEST_EQ(i, wstreamable_medium::value);
     return istr;
 }
 
 struct wstreamable_hard { enum ENU {value = 6}; };
 template <class CharT, class TraitsT>
-typename boost::enable_if<boost::is_same<CharT, wchar_t>, std::basic_ostream<CharT, TraitsT>&>::type 
+typename std::enable_if<std::is_same<CharT, wchar_t>::value, std::basic_ostream<CharT, TraitsT>&>::type
 operator << (std::basic_ostream<CharT, TraitsT>& ostr, const wstreamable_hard&) {
     return ostr << wstreamable_hard::value;
 }
 template <class CharT, class TraitsT>
-typename boost::enable_if<boost::is_same<CharT, wchar_t>, std::basic_istream<CharT, TraitsT>&>::type 
+typename std::enable_if<std::is_same<CharT, wchar_t>::value, std::basic_istream<CharT, TraitsT>&>::type
 operator >> (std::basic_istream<CharT, TraitsT>& istr, const wstreamable_hard&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, wstreamable_hard::value);
+    int i; istr >> i; BOOST_TEST_EQ(i, wstreamable_hard::value);
     return istr;
 }
 
@@ -110,7 +109,7 @@ std::basic_ostream<wchar_t, TraitsT>& operator << (std::basic_ostream<wchar_t, T
 }
 template <class TraitsT>
 std::basic_istream<wchar_t, TraitsT>& operator >> (std::basic_istream<wchar_t, TraitsT>& istr, const wstreamable_hard2&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, wstreamable_hard2::value);
+    int i; istr >> i; BOOST_TEST_EQ(i, wstreamable_hard2::value);
     return istr;
 }
 
@@ -122,7 +121,7 @@ std::ostream& operator << (std::ostream& ostr, const bistreamable_easy&) {
     return ostr << bistreamable_easy::value;
 }
 std::istream& operator >> (std::istream& istr, const bistreamable_easy&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, bistreamable_easy::value);
+    int i; istr >> i; BOOST_TEST_EQ(i, bistreamable_easy::value);
     return istr;
 }
 
@@ -130,7 +129,7 @@ std::wostream& operator << (std::wostream& ostr, const bistreamable_easy&) {
     return ostr << bistreamable_easy::value + 100;
 }
 std::wistream& operator >> (std::wistream& istr, const bistreamable_easy&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, bistreamable_easy::value + 100);
+    int i; istr >> i; BOOST_TEST_EQ(i, bistreamable_easy::value + 100);
     return istr;
 }
 
@@ -141,7 +140,7 @@ std::basic_ostream<CharT>& operator << (std::basic_ostream<CharT>& ostr, const b
 }
 template <class CharT>
 std::basic_istream<CharT>& operator >> (std::basic_istream<CharT>& istr, const bistreamable_medium&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, bistreamable_medium::value + (sizeof(CharT) == 1 ? 0 : 100));
+    int i; istr >> i; BOOST_TEST_EQ(i, bistreamable_medium::value + (sizeof(CharT) == 1 ? 0 : 100));
     return istr;
 }
 
@@ -152,7 +151,7 @@ std::basic_ostream<CharT, TraitsT>& operator << (std::basic_ostream<CharT, Trait
 }
 template <class CharT, class TraitsT>
 std::basic_istream<CharT, TraitsT>& operator >> (std::basic_istream<CharT, TraitsT>& istr, const bistreamable_hard&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, bistreamable_hard::value + (sizeof(CharT) == 1 ? 0 : 100));
+    int i; istr >> i; BOOST_TEST_EQ(i, bistreamable_hard::value + (sizeof(CharT) == 1 ? 0 : 100));
     return istr;
 }
 
@@ -163,7 +162,7 @@ std::basic_ostream<char, TraitsT>& operator << (std::basic_ostream<char, TraitsT
 }
 template <class TraitsT>
 std::basic_istream<char, TraitsT>& operator >> (std::basic_istream<char, TraitsT>& istr, const bistreamable_hard2&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, bistreamable_hard2::value);
+    int i; istr >> i; BOOST_TEST_EQ(i, bistreamable_hard2::value);
     return istr;
 }
 
@@ -173,49 +172,33 @@ std::basic_ostream<wchar_t, TraitsT>& operator << (std::basic_ostream<wchar_t, T
 }
 template <class TraitsT>
 std::basic_istream<wchar_t, TraitsT>& operator >> (std::basic_istream<wchar_t, TraitsT>& istr, const bistreamable_hard2&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, bistreamable_hard2::value + 100);
+    int i; istr >> i; BOOST_TEST_EQ(i, bistreamable_hard2::value + 100);
     return istr;
 }
 
-
-void test_ostream_character_detection();
-void test_istream_character_detection();
-void test_mixed_stream_character_detection();
-
-boost::unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    boost::unit_test::test_suite *suite = 
-        BOOST_TEST_SUITE("lexical_cast stream character detection");
-    suite->add(BOOST_TEST_CASE(&test_ostream_character_detection));
-    suite->add(BOOST_TEST_CASE(&test_istream_character_detection));
-    suite->add(BOOST_TEST_CASE(&test_mixed_stream_character_detection));
-    
-    return suite;
-}
-
 template <class T>
 static void test_ostr_impl() {
     T streamable;
-    BOOST_CHECK_EQUAL(T::value,  boost::lexical_cast<int>(streamable));
-    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(T::value),  boost::lexical_cast<std::string>(streamable));
+    BOOST_TEST_EQ(T::value,  boost::lexical_cast<int>(streamable));
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(T::value),  boost::lexical_cast<std::string>(streamable));
 }
 
 template <class T>
 static void test_wostr_impl() {
     T streamable;
-    BOOST_CHECK_EQUAL(T::value,  boost::lexical_cast<int>(streamable));
-    // BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(T::value), boost::lexical_cast<std::string>(streamable)); // Shall not compile???
-    BOOST_CHECK(boost::lexical_cast<std::wstring>(T::value) == boost::lexical_cast<std::wstring>(streamable));
+    BOOST_TEST_EQ(T::value,  boost::lexical_cast<int>(streamable));
+    // BOOST_TEST_EQ(boost::lexical_cast<std::string>(T::value), boost::lexical_cast<std::string>(streamable)); // Shall not compile???
+    BOOST_TEST(boost::lexical_cast<std::wstring>(T::value) == boost::lexical_cast<std::wstring>(streamable));
 }
 
 template <class T>
 static void test_bistr_impl() {
     T streamable;
 
-    BOOST_CHECK_EQUAL(T::value,  boost::lexical_cast<int>(streamable));
-    BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(T::value),  boost::lexical_cast<std::string>(streamable));
+    BOOST_TEST_EQ(T::value,  boost::lexical_cast<int>(streamable));
+    BOOST_TEST_EQ(boost::lexical_cast<std::string>(T::value),  boost::lexical_cast<std::string>(streamable));
 
-    BOOST_CHECK(boost::lexical_cast<std::wstring>(T::value + 100) == boost::lexical_cast<std::wstring>(streamable));
+    BOOST_TEST(boost::lexical_cast<std::wstring>(T::value + 100) == boost::lexical_cast<std::wstring>(streamable));
 }
 
 void test_ostream_character_detection() {
@@ -223,12 +206,12 @@ void test_ostream_character_detection() {
     test_ostr_impl<streamable_medium>();
     test_ostr_impl<streamable_hard>();
     test_ostr_impl<streamable_hard2>();
-    
+
     test_wostr_impl<wstreamable_easy>();
     test_wostr_impl<wstreamable_medium>();
     test_wostr_impl<wstreamable_hard>();
     test_wostr_impl<wstreamable_hard2>();
-    
+
     test_bistr_impl<bistreamable_easy>();
     test_bistr_impl<bistreamable_medium>();
     test_bistr_impl<bistreamable_hard>();
@@ -261,29 +244,26 @@ void test_istream_character_detection() {
     test_istr_impl<streamable_medium>();
     test_istr_impl<streamable_hard>();
     test_istr_impl<streamable_hard2>();
-    
+
     test_wistr_impl<wstreamable_easy>();
     test_wistr_impl<wstreamable_medium>();
     test_wistr_impl<wstreamable_hard>();
     test_wistr_impl<wstreamable_hard2>();
-    
+
     test_bistr_instr_impl<bistreamable_easy>();
     test_bistr_instr_impl<bistreamable_medium>();
     test_bistr_instr_impl<bistreamable_hard>();
     test_bistr_instr_impl<bistreamable_hard2>();
 }
 
-
-
-
-
-
 struct wistreamble_ostreamable { enum ENU {value = 200}; };
 std::ostream& operator << (std::ostream& ostr, const wistreamble_ostreamable&) {
     return ostr << wistreamble_ostreamable::value;
 }
 std::wistream& operator >> (std::wistream& istr, const wistreamble_ostreamable&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, wistreamble_ostreamable::value);
+    int i = 100;
+    istr >> i;
+    BOOST_TEST_EQ(i, wistreamble_ostreamable::value);
     return istr;
 }
 
@@ -292,16 +272,27 @@ std::wostream& operator << (std::wostream& ostr, const istreamble_wostreamable&)
     return ostr << istreamble_wostreamable::value;
 }
 std::istream& operator >> (std::istream& istr, const istreamble_wostreamable&) {
-    int i; istr >> i; BOOST_CHECK_EQUAL(i, istreamble_wostreamable::value);
+    int i; istr >> i; BOOST_TEST_EQ(i, istreamble_wostreamable::value);
     return istr;
 }
 
 void test_mixed_stream_character_detection() {
     //boost::lexical_cast<std::wstring>(std::string("qwe")); // TODO: ALLOW IT AS EXTENSION!
-    
+
+    BOOST_TEST_EQ(boost::lexical_cast<int>(wistreamble_ostreamable::value), wistreamble_ostreamable::value);
     boost::lexical_cast<wistreamble_ostreamable>(wistreamble_ostreamable::value);
-    BOOST_CHECK_EQUAL(boost::lexical_cast<int>(wistreamble_ostreamable()), wistreamble_ostreamable::value);
-    
+    BOOST_TEST_EQ(boost::lexical_cast<int>(wistreamble_ostreamable()), wistreamble_ostreamable::value);
+
     boost::lexical_cast<istreamble_wostreamable>(istreamble_wostreamable::value);
-    BOOST_CHECK_EQUAL(boost::lexical_cast<int>(istreamble_wostreamable()), istreamble_wostreamable::value);
+    BOOST_TEST_EQ(boost::lexical_cast<int>(istreamble_wostreamable()), istreamble_wostreamable::value);
+}
+
+
+int main()
+{
+    test_ostream_character_detection();
+    test_istream_character_detection();
+    test_mixed_stream_character_detection();
+
+    return boost::report_errors();
 }

test/stream_traits_test.cpp

@@ -0,0 +1,195 @@
+//  Copyright Antony Polukhin, 2012-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+#if defined(BOOST_USE_MODULES)
+#undef BOOST_USE_MODULES
+#endif
+#include <boost/lexical_cast/detail/converter_lexical.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <boost/array.hpp>
+#include <boost/container/string.hpp>
+#include <boost/range/iterator_range.hpp>
+#include <boost/utility/string_view.hpp>
+
+#include <type_traits>
+
+template <class T>
+struct is_optimized_stream : std::false_type {};
+
+template <class CharT, class Traits, std::size_t CharacterBufferSize>
+struct is_optimized_stream< boost::detail::lcast::optimized_src_stream<CharT, Traits, CharacterBufferSize> > : std::true_type {};
+
+template <class Source, class Target>
+static void assert_optimized_stream()
+{
+    BOOST_TEST((is_optimized_stream<
+        typename boost::detail::lexical_converter_impl<Source, Target>::from_src_stream
+    >::value));
+}
+
+template <class T>
+static void test_optimized_types_to_string_const()
+{
+    namespace de = boost::detail;
+    typedef de::lexical_cast_stream_traits<T, std::string> trait_1;
+    BOOST_TEST((std::is_same<typename trait_1::src_char_t, char>::value));
+    BOOST_TEST((std::is_same<typename trait_1::target_char_t, char>::value));
+    BOOST_TEST((std::is_same<typename trait_1::char_type, char>::value));
+    assert_optimized_stream<T, std::string>();
+    assert_optimized_stream<T, boost::container::string>();
+
+    typedef de::lexical_cast_stream_traits<const T, std::string> trait_2;
+    BOOST_TEST((std::is_same<typename trait_2::src_char_t, char>::value));
+    BOOST_TEST((std::is_same<typename trait_2::target_char_t, char>::value));
+    BOOST_TEST((std::is_same<typename trait_2::char_type, char>::value));
+
+    typedef de::lexical_cast_stream_traits<T, std::wstring> trait_3;
+    BOOST_TEST((std::is_same<typename trait_3::src_char_t, char>::value));
+    BOOST_TEST((std::is_same<typename trait_3::target_char_t, wchar_t>::value));
+    BOOST_TEST((std::is_same<typename trait_3::char_type, wchar_t>::value));
+    assert_optimized_stream<T, std::wstring>();
+    assert_optimized_stream<T, boost::container::wstring>();
+}
+
+
+template <class T>
+static void test_optimized_types_to_string()
+{
+    test_optimized_types_to_string_const<T>();
+
+    namespace de = boost::detail;
+    typedef de::lexical_cast_stream_traits<std::string, T> trait_4;
+    BOOST_TEST((std::is_same<typename trait_4::src_char_t, char>::value));
+    BOOST_TEST((std::is_same<typename trait_4::target_char_t, char>::value));
+    BOOST_TEST((std::is_same<typename trait_4::char_type, char>::value));
+    assert_optimized_stream<std::string, T>();
+
+    typedef de::lexical_cast_stream_traits<const std::string, T> trait_5;
+    BOOST_TEST((std::is_same<typename trait_5::src_char_t, char>::value));
+    BOOST_TEST((std::is_same<typename trait_5::target_char_t, char>::value));
+    BOOST_TEST((std::is_same<typename trait_5::char_type, char>::value));
+
+    typedef de::lexical_cast_stream_traits<const std::wstring, T> trait_6;
+    BOOST_TEST((std::is_same<typename trait_6::src_char_t, wchar_t>::value));
+    BOOST_TEST((std::is_same<typename trait_6::target_char_t, char>::value));
+    BOOST_TEST((std::is_same<typename trait_6::char_type, wchar_t>::value));
+}
+
+
+template <class T>
+static void test_optimized_types_to_x_string()
+{
+    test_optimized_types_to_string<T>();
+    assert_optimized_stream<std::wstring, T>();
+    assert_optimized_stream<boost::container::wstring, T>();
+}
+
+
+template <class T>
+static void test_optimized_types_to_wstring()
+{
+    assert_optimized_stream<std::wstring, T>();
+    assert_optimized_stream<T, std::wstring>();
+    assert_optimized_stream<boost::container::wstring, T>();
+    assert_optimized_stream<T, boost::container::wstring>();
+}
+
+void test_metafunctions()
+{
+    test_optimized_types_to_x_string<bool>();
+    test_optimized_types_to_x_string<char>();
+    test_optimized_types_to_x_string<unsigned char>();
+    test_optimized_types_to_x_string<signed char>();
+    test_optimized_types_to_x_string<short>();
+    test_optimized_types_to_x_string<unsigned short>();
+    test_optimized_types_to_x_string<int>();
+    test_optimized_types_to_x_string<unsigned int>();
+    test_optimized_types_to_x_string<long>();
+    test_optimized_types_to_x_string<unsigned long>();
+
+#if defined(BOOST_HAS_LONG_LONG)
+    test_optimized_types_to_x_string<boost::ulong_long_type>();
+    test_optimized_types_to_x_string<boost::long_long_type>();
+#elif defined(BOOST_HAS_MS_INT64)
+    test_optimized_types_to_x_string<unsigned __int64>();
+    test_optimized_types_to_x_string<__int64>();
+#endif
+
+    test_optimized_types_to_string<float>();
+    test_optimized_types_to_string<double>();
+    test_optimized_types_to_string<long double>();
+    test_optimized_types_to_string<std::string>();
+    test_optimized_types_to_string<char*>();
+    //test_optimized_types_to_string<char[5]>();
+    //test_optimized_types_to_string<char[1]>();
+    test_optimized_types_to_string<unsigned char*>();
+    //test_optimized_types_to_string<unsigned char[5]>();
+    //test_optimized_types_to_string<unsigned char[1]>();
+    test_optimized_types_to_string<signed char*>();
+    //test_optimized_types_to_string<signed char[5]>();
+    //test_optimized_types_to_string<signed char[1]>();
+    test_optimized_types_to_string<boost::array<char, 1> >();
+    test_optimized_types_to_string<boost::array<char, 5> >();
+    test_optimized_types_to_string<boost::array<unsigned char, 1> >();
+    test_optimized_types_to_string<boost::array<unsigned char, 5> >();
+    test_optimized_types_to_string<boost::array<signed char, 1> >();
+    test_optimized_types_to_string<boost::array<signed char, 5> >();
+    test_optimized_types_to_string<boost::iterator_range<char*> >();
+    test_optimized_types_to_string<boost::iterator_range<unsigned char*> >();
+    test_optimized_types_to_string<boost::iterator_range<signed char*> >();
+
+    test_optimized_types_to_string_const<boost::array<const char, 1> >();
+    test_optimized_types_to_string_const<boost::array<const char, 5> >();
+    test_optimized_types_to_string_const<boost::array<const unsigned char, 1> >();
+    test_optimized_types_to_string_const<boost::array<const unsigned char, 5> >();
+    test_optimized_types_to_string_const<boost::array<const signed char, 1> >();
+    test_optimized_types_to_string_const<boost::array<const signed char, 5> >();
+    test_optimized_types_to_string_const<boost::iterator_range<const char*> >();
+    test_optimized_types_to_string_const<boost::iterator_range<const unsigned char*> >();
+    test_optimized_types_to_string_const<boost::iterator_range<const signed char*> >();
+
+#ifndef BOOST_NO_CXX11_HDR_ARRAY
+    test_optimized_types_to_string<std::array<char, 1> >();
+    test_optimized_types_to_string<std::array<char, 5> >();
+    test_optimized_types_to_string<std::array<unsigned char, 1> >();
+    test_optimized_types_to_string<std::array<unsigned char, 5> >();
+    test_optimized_types_to_string<std::array<signed char, 1> >();
+    test_optimized_types_to_string<std::array<signed char, 5> >();
+
+    test_optimized_types_to_string_const<std::array<const char, 1> >();
+    test_optimized_types_to_string_const<std::array<const char, 5> >();
+    test_optimized_types_to_string_const<std::array<const unsigned char, 1> >();
+    test_optimized_types_to_string_const<std::array<const unsigned char, 5> >();
+    test_optimized_types_to_string_const<std::array<const signed char, 1> >();
+    test_optimized_types_to_string_const<std::array<const signed char, 5> >();
+
+    test_optimized_types_to_wstring<std::array<wchar_t, 42>>();
+    test_optimized_types_to_wstring<std::array<const wchar_t, 42>>();
+#endif
+    
+    test_optimized_types_to_wstring<wchar_t*>();
+    test_optimized_types_to_wstring<const wchar_t*>();
+    test_optimized_types_to_wstring<boost::iterator_range<const wchar_t*>>();
+    test_optimized_types_to_wstring<boost::iterator_range<wchar_t*>>();
+
+    test_optimized_types_to_string<boost::string_view>();
+    test_optimized_types_to_wstring<boost::basic_string_view<wchar_t>>();
+
+#ifndef BOOST_NO_CXX17_HDR_STRING_VIEW
+    test_optimized_types_to_string<std::string_view>();
+    test_optimized_types_to_wstring<std::basic_string_view<wchar_t>>();
+#endif
+}
+
+int main()
+{
+    test_metafunctions();
+
+    return boost::report_errors();
+}
+

test/string_view_test.cpp

@@ -0,0 +1,49 @@
+//  Unit test for boost::lexical_cast.
+//
+//  See http://www.boost.org for most recent version, including documentation.
+//
+//  Copyright Antony Polukhin, 2012-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+
+#include <boost/utility/string_view.hpp>
+
+#ifndef BOOST_NO_CXX17_HDR_STRING_VIEW
+#include <string_view>
+#endif
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <boost/lexical_cast.hpp>
+
+
+template <class StringView>
+void test_string_view_conversion() {
+    using boost::lexical_cast;
+
+    StringView sw = "1";
+    BOOST_TEST_EQ(lexical_cast<std::string>(sw), "1");
+    BOOST_TEST_EQ(lexical_cast<int>(sw), 1);
+
+    sw = StringView("a\0b", 3);
+    BOOST_TEST_EQ(lexical_cast<std::string>(sw), std::string("a\0b", 3));
+
+    sw = StringView("a\0b", 4);
+    BOOST_TEST_EQ(lexical_cast<std::string>(sw), std::string("a\0b", 4));
+
+    sw = StringView("\0a\0", 3);
+    BOOST_TEST_EQ(lexical_cast<std::string>(sw), std::string("\0a\0", 3));
+}
+
+int main() {
+    test_string_view_conversion<boost::string_view>();
+
+#ifndef BOOST_NO_CXX17_HDR_STRING_VIEW
+    test_string_view_conversion<std::string_view>();
+#endif
+
+    return boost::report_errors();
+}

test/to_pointer_test.cpp

@@ -2,22 +2,17 @@
 //
 //  See http://www.boost.org for most recent version, including documentation.
 //
-//  Copyright Antony Polukhin, 2013.
+//  Copyright Antony Polukhin, 2013-2026.
 //
 //  Distributed under the Boost
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
 
 #include <boost/lexical_cast.hpp>
-#include <boost/type.hpp>
 
-#define BOOST_INCLUDE_MAIN
-#include <boost/test/test_tools.hpp>
-
-int test_main(int, char*[])
+int main()
 {
     boost::lexical_cast<char*>("Hello");
-    BOOST_CHECK(false); // suppressing warning about 'boost::unit_test::{anonymous}::unit_test_log' defined but not used
-    return 0;
+    return 1;
 }
 

test/try_lexical_convert.cpp

@@ -0,0 +1,75 @@
+//  Unit test for boost::lexical_cast.
+//
+//  See http://www.boost.org for most recent version, including documentation.
+//
+//  Copyright Antony Polukhin, 2014-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+#include <boost/core/lightweight_test.hpp>
+
+#include <boost/lexical_cast/try_lexical_convert.hpp>
+
+using namespace boost::conversion;
+
+void try_uncommon_cases()
+{
+    std::string sres;
+    const bool res1 = try_lexical_convert(std::string("Test string"), sres);
+    BOOST_TEST(res1);
+    BOOST_TEST_EQ(sres, "Test string");
+
+    volatile int vires;
+    const bool res2 = try_lexical_convert(100, vires);
+    BOOST_TEST(res2);
+    BOOST_TEST_EQ(vires, 100);
+
+    const bool res3 = try_lexical_convert("Test string", sres);
+    BOOST_TEST(res3);
+    BOOST_TEST_EQ(sres, "Test string");
+
+    const bool res4 = try_lexical_convert("Test string", sizeof("Test string") - 1, sres);
+    BOOST_TEST(res4);
+    BOOST_TEST_EQ(sres, "Test string");
+
+    int ires;
+    BOOST_TEST(!try_lexical_convert("Test string", ires));
+    BOOST_TEST(!try_lexical_convert(1.1, ires));
+    BOOST_TEST(!try_lexical_convert(-1.9, ires));
+    BOOST_TEST(!try_lexical_convert("1.1", ires));
+    BOOST_TEST(!try_lexical_convert("1000000000000000000000000000000000000000", ires));
+}
+
+
+void try_common_cases()
+{
+    int ires = 0;
+    const bool res1 = try_lexical_convert(std::string("100"), ires);
+    BOOST_TEST(res1);
+    BOOST_TEST_EQ(ires, 100);
+
+    ires = 0;
+    const bool res2 = try_lexical_convert("-100", ires);
+    BOOST_TEST(res2);
+    BOOST_TEST_EQ(ires, -100);
+
+    float fres = 1.0f;
+    const bool res3 = try_lexical_convert("0.0", fres);
+    BOOST_TEST(res3);
+    BOOST_TEST_EQ(fres, 0.0f);
+
+    fres = 1.0f;
+    const bool res4 = try_lexical_convert("0.0", sizeof("0.0") - 1, fres);
+    BOOST_TEST(res4);
+    BOOST_TEST_EQ(fres, 0.0f);
+}
+
+int main()
+{
+    try_uncommon_cases();
+    try_common_cases();
+
+    return boost::report_errors();
+}

test/typedefed_wchar_test.cpp

@@ -2,17 +2,15 @@
 //
 //  See http://www.boost.org for most recent version, including documentation.
 //
-//  Copyright Antony Polukhin, 2011.
+//  Copyright Antony Polukhin, 2011-2026.
 //
 //  Distributed under the Boost
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
 
-#include <boost/config.hpp>
-
-#include <boost/static_assert.hpp>
 #include <boost/lexical_cast.hpp>
 
+#include <boost/static_assert.hpp>
 #include <boost/date_time/gregorian/gregorian.hpp>
 #include <boost/date_time/posix_time/posix_time.hpp>
 
@@ -29,10 +27,6 @@ void parseDate()
 
 int main()
 {
-#ifdef BOOST_MSVC
-    BOOST_STATIC_ASSERT((boost::is_same<wchar_t, unsigned short>::value));
-#endif
-
     parseDate();
     return ::boost::lexical_cast<int>(L"1000") == 1000;
 }

test/typedefed_wchar_test_runtime.cpp

@@ -0,0 +1,53 @@
+//  Unit test for boost::lexical_cast.
+//
+//  See http://www.boost.org for most recent version, including documentation.
+//
+//  Copyright Antony Polukhin, 2011-2026.
+//
+//  Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
+
+#include <boost/lexical_cast.hpp>
+
+#include <boost/core/lightweight_test.hpp>
+
+void test_typedefed_wchar_t(unsigned short)  // wchar_t is a typedef for unsigned short
+{
+    BOOST_TEST(boost::lexical_cast<int>(L'A') == 65);
+    BOOST_TEST(boost::lexical_cast<int>(L'B') == 66);
+
+    BOOST_TEST(boost::lexical_cast<wchar_t>(L"65") == 65);
+    BOOST_TEST(boost::lexical_cast<wchar_t>(L"66") == 66);
+}
+
+template <class T>
+void test_typedefed_wchar_t(T)
+{
+    BOOST_TEST(1);
+}
+
+void test_typedefed_wchar_t_runtime()
+{
+    test_typedefed_wchar_t(L'0');
+}
+
+void test_unsigned_short_to_wstring()
+{
+    // Test case from https://github.com/boostorg/lexical_cast/issues/89
+    unsigned short number = 4550;
+
+    auto res1 = boost::lexical_cast<std::wstring>(number);
+    BOOST_TEST(res1 == L"4550");
+
+    auto res2 = boost::lexical_cast<std::string>(number);
+    BOOST_TEST_EQ(res2, "4550");
+}
+
+int main()
+{
+    test_typedefed_wchar_t_runtime();
+    test_unsigned_short_to_wstring();
+
+    return boost::report_errors();
+}

test/vc8_bug_test.cpp

@@ -12,12 +12,18 @@
 // implementation has changed and it does not use stringstream for casts
 // to integral types
 
-#include <boost/config.hpp>
-#include <boost/lexical_cast.hpp>
 #include <boost/cstdint.hpp>
-#include <boost/test/unit_test.hpp>
+
+#include <boost/core/lightweight_test.hpp>
 
 #include <string>
+#include <sstream>
+
+#include <boost/lexical_cast.hpp>
+
+#ifdef BOOST_MSVC
+# pragma warning(disable: 4127) // conditional expression is constant
+#endif
 
 using namespace boost;
 
@@ -33,22 +39,22 @@ void test_too_long_number(CharT zero)
     std::basic_ostringstream<CharT> o;
     o << (limits::max)() << zero;
     s = o.str();
-    BOOST_CHECK_THROW(lexical_cast<T>(s), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>(s), bad_lexical_cast);
     s[s.size()-1] += static_cast<CharT>(9); // '0' -> '9'
-    BOOST_CHECK_THROW(lexical_cast<T>(s), bad_lexical_cast);
+    BOOST_TEST_THROWS(lexical_cast<T>(s), bad_lexical_cast);
 
-    if(limits::is_signed)
+    if (limits::is_signed)
     {
-        std::basic_ostringstream<CharT> o;
-        o << (limits::min)() << zero;
-        s = o.str();
-        BOOST_CHECK_THROW(lexical_cast<T>(s), bad_lexical_cast);
+        std::basic_ostringstream<CharT> o2;
+        o2 << (limits::min)() << zero;
+        s = o2.str();
+        BOOST_TEST_THROWS(lexical_cast<T>(s), bad_lexical_cast);
         s[s.size()-1] += static_cast<CharT>(9); // '0' -> '9'
-        BOOST_CHECK_THROW(lexical_cast<T>(s), bad_lexical_cast);
+        BOOST_TEST_THROWS(lexical_cast<T>(s), bad_lexical_cast);
     }
 }
 
-void test_vc8_bug()
+int main()
 {
     test_too_long_number<boost::intmax_t>('0');
     test_too_long_number<boost::uintmax_t>('0');
@@ -56,12 +62,6 @@ void test_vc8_bug()
     test_too_long_number<boost::intmax_t>(L'0');
     test_too_long_number<boost::uintmax_t>(L'0');
 #endif
-}
 
-unit_test::test_suite *init_unit_test_suite(int, char *[])
-{
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast vc8 bug unit test");
-    suite->add(BOOST_TEST_CASE(test_vc8_bug));
-    return suite;
+    return boost::report_errors();
 }

test/wchars_test.cpp

@@ -2,24 +2,20 @@
 //
 //  See http://www.boost.org for most recent version, including documentation.
 //
-//  Copyright Antony Polukhin, 2011-2012.
+//  Copyright Antony Polukhin, 2011-2026.
 //
 //  Distributed under the Boost
 //  Software License, Version 1.0. (See accompanying file
 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
 
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
+#include <boost/core/lightweight_test.hpp>
 
 #include <boost/lexical_cast.hpp>
-#include <boost/test/unit_test.hpp>
 
-using namespace boost;
+#if defined(BOOST_USE_MODULES)
+#undef BOOST_USE_MODULES
+#endif
+#include <boost/lexical_cast/detail/lcast_char_constants.hpp>
 
 #if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
 #define BOOST_LCAST_NO_WCHAR_T
@@ -36,14 +32,14 @@ void test_impl(const CharT* wc_arr)
 
     // Following tests depend on realization of std::locale
     // and pass for popular compilers and STL realizations
-    BOOST_CHECK(boost::lexical_cast<wide_char>(c_arr[0]) == wc_arr[0]);
-    BOOST_CHECK(boost::lexical_cast<wide_string>(c_arr) == wide_string(wc_arr));
+    BOOST_TEST(boost::lexical_cast<wide_char>(c_arr[0]) == wc_arr[0]);
+    BOOST_TEST(boost::lexical_cast<wide_string>(c_arr) == wide_string(wc_arr));
 
-    BOOST_CHECK(boost::lexical_cast<wide_string>(sc_arr) == wide_string(wc_arr) );
-    BOOST_CHECK(boost::lexical_cast<wide_string>(uc_arr) == wide_string(wc_arr) );
+    BOOST_TEST(boost::lexical_cast<wide_string>(sc_arr) == wide_string(wc_arr) );
+    BOOST_TEST(boost::lexical_cast<wide_string>(uc_arr) == wide_string(wc_arr) );
 
-    BOOST_CHECK_EQUAL(boost::lexical_cast<wide_char>(uc_arr[0]), wc_arr[0]);
-    BOOST_CHECK_EQUAL(boost::lexical_cast<wide_char>(sc_arr[0]), wc_arr[0]);
+    BOOST_TEST(boost::lexical_cast<wide_char>(uc_arr[0]) == wc_arr[0]);
+    BOOST_TEST(boost::lexical_cast<wide_char>(sc_arr[0]) == wc_arr[0]);
 }
 
 
@@ -52,25 +48,25 @@ void test_char_types_conversions_wchar_t()
 #ifndef BOOST_LCAST_NO_WCHAR_T
     test_impl(L"Test array of chars");
     wchar_t c = boost::detail::lcast_char_constants<wchar_t>::zero;
-    BOOST_CHECK_EQUAL(L'0', c);
+    BOOST_TEST(L'0' == c);
 
     c = boost::detail::lcast_char_constants<wchar_t>::minus;
-    BOOST_CHECK_EQUAL(L'-', c);
+    BOOST_TEST(L'-' == c);
 
     c = boost::detail::lcast_char_constants<wchar_t>::plus;
-    BOOST_CHECK_EQUAL(L'+', c);
+    BOOST_TEST(L'+' == c);
 
     c = boost::detail::lcast_char_constants<wchar_t>::lowercase_e;
-    BOOST_CHECK_EQUAL(L'e', c);
+    BOOST_TEST(L'e' == c);
 
     c = boost::detail::lcast_char_constants<wchar_t>::capital_e;
-    BOOST_CHECK_EQUAL(L'E', c);
+    BOOST_TEST(L'E' == c);
 
     c = boost::detail::lcast_char_constants<wchar_t>::c_decimal_separator;
-    BOOST_CHECK_EQUAL(L'.', c);
+    BOOST_TEST(L'.' == c);
 #endif
 
-    BOOST_CHECK(true);
+    BOOST_TEST(true);
 }
 
 void test_char_types_conversions_char16_t()
@@ -78,25 +74,25 @@ void test_char_types_conversions_char16_t()
 #if !defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && defined(BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES)
     test_impl(u"Test array of chars");
     char16_t c = boost::detail::lcast_char_constants<char16_t>::zero;
-    BOOST_CHECK_EQUAL(u'0', c);
+    BOOST_TEST(u'0' == c);
 
     c = boost::detail::lcast_char_constants<char16_t>::minus;
-    BOOST_CHECK_EQUAL(u'-', c);
+    BOOST_TEST(u'-' == c);
 
     c = boost::detail::lcast_char_constants<char16_t>::plus;
-    BOOST_CHECK_EQUAL(u'+', c);
+    BOOST_TEST(u'+' == c);
 
     c = boost::detail::lcast_char_constants<char16_t>::lowercase_e;
-    BOOST_CHECK_EQUAL(u'e', c);
+    BOOST_TEST(u'e' == c);
 
     c = boost::detail::lcast_char_constants<char16_t>::capital_e;
-    BOOST_CHECK_EQUAL(u'E', c);
+    BOOST_TEST(u'E' == c);
 
     c = boost::detail::lcast_char_constants<char16_t>::c_decimal_separator;
-    BOOST_CHECK_EQUAL(u'.', c);
+    BOOST_TEST(u'.' == c);
 #endif
 
-    BOOST_CHECK(true);
+    BOOST_TEST(true);
 }
 
 void test_char_types_conversions_char32_t()
@@ -104,34 +100,32 @@ void test_char_types_conversions_char32_t()
 #if !defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CXX11_UNICODE_LITERALS) && defined(BOOST_STL_SUPPORTS_NEW_UNICODE_LOCALES)
     test_impl(U"Test array of chars");
     char32_t c = boost::detail::lcast_char_constants<char32_t>::zero;
-    BOOST_CHECK_EQUAL(U'0', c);
+    BOOST_TEST(U'0' == c);
 
     c = boost::detail::lcast_char_constants<char32_t>::minus;
-    BOOST_CHECK_EQUAL(U'-', c);
+    BOOST_TEST(U'-' == c);
 
     c = boost::detail::lcast_char_constants<char32_t>::plus;
-    BOOST_CHECK_EQUAL(U'+', c);
+    BOOST_TEST(U'+' == c);
 
     c = boost::detail::lcast_char_constants<char32_t>::lowercase_e;
-    BOOST_CHECK_EQUAL(U'e', c);
+    BOOST_TEST(U'e' == c);
 
     c = boost::detail::lcast_char_constants<char32_t>::capital_e;
-    BOOST_CHECK_EQUAL(U'E', c);
+    BOOST_TEST(U'E', == c);
 
     c = boost::detail::lcast_char_constants<char32_t>::c_decimal_separator;
-    BOOST_CHECK_EQUAL(U'.', c);
+    BOOST_TEST(U'.' == c);
 #endif
 
-    BOOST_CHECK(true);
+    BOOST_TEST(true);
 }
 
-unit_test::test_suite *init_unit_test_suite(int, char *[])
+int main()
 {
-    unit_test::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast char => wide characters unit test (widening test)");
-    suite->add(BOOST_TEST_CASE(&test_char_types_conversions_wchar_t));
-    suite->add(BOOST_TEST_CASE(&test_char_types_conversions_char16_t));
-    suite->add(BOOST_TEST_CASE(&test_char_types_conversions_char32_t));
+    test_char_types_conversions_wchar_t();
+    test_char_types_conversions_char16_t();
+    test_char_types_conversions_char32_t();
 
-    return suite;
+    return boost::report_errors();
 }