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Efficient skipToNthElementImpl for Take and Map generators

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This commit is contained in:
Martin Hořeňovský
2026-02-15 21:43:54 +01:00
parent 75bfcc3f30
commit edfed6c04e
1 changed files with 4 additions and 18 deletions
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src/catch2/generators/catch_generators_adapters.hpp
+4 -18
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@@ -30,13 +30,8 @@ namespace Generators {
"Coud not jump to Nth element: not enough elements" );
}
for (; m_returned < n; ++m_returned) {
const auto success = m_generator.next();
if ( !success ) {
Detail::throw_generator_exception(
"Coud not jump to Nth element: not enough elements" );
}
}
m_generator.skipToNthElement( n );
m_returned = n;
}
public:
@@ -186,17 +181,8 @@ namespace Generators {
mutable Optional<T> m_cache;
void skipToNthElementImpl( std::size_t n ) override {
for ( size_t curr = GeneratorUntypedBase::currentElementIndex();
curr < n;
++curr ) {
const auto success = m_generator.next();
if (!success) {
Detail::throw_generator_exception(
"Coud not jump to Nth element: not enough elements" );
}
}
m_cache = m_function( m_generator.get() );
m_generator.skipToNthElement( n );
m_cache.reset();
}
public: