mirror of
https://github.com/boostorg/conversion.git
synced 2026-07-21 13:13:35 +00:00
Fedor Osetrov
50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
// boost implicit_cast.hpp header file ----------------------------------------------//
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// (C) Copyright David Abrahams, 2003.
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// (C) Copyright Fedor Osetrov, 2025-2026.
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_IMPLICIT_CAST_DWA200356_HPP
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#define BOOST_IMPLICIT_CAST_DWA200356_HPP
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#include <boost/conversion/detail/config.hpp>
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#if !defined(BOOST_USE_MODULES) || defined(BOOST_CONVERSION_INTERFACE_UNIT)
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#ifdef BOOST_HAS_PRAGMA_ONCE
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# pragma once
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#endif
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namespace boost {
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namespace detail {
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template<class T> struct icast_identity
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{
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using type = T;
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};
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} // namespace detail
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BOOST_CONVERSION_BEGIN_MODULE_EXPORT
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// implementation originally suggested by C. Green in
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// http://lists.boost.org/MailArchives/boost/msg00886.php
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// The use of identity creates a non-deduced form, so that the
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// explicit template argument must be supplied
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template <typename T>
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constexpr T implicit_cast (typename boost::detail::icast_identity<T>::type x) {
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return x;
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}
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BOOST_CONVERSION_END_MODULE_EXPORT
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} // namespace boost
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#endif // !defined(BOOST_USE_MODULES) || defined(BOOST_CONVERSION_INTERFACE_UNIT)
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#endif // BOOST_IMPLICIT_CAST_DWA200356_HPP
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