| 1 | // Copyright 2021 Peter Dimov |
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| 2 | // Distributed under the Boost Software License, Version 1.0. |
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| 3 | // https://www.boost.org/LICENSE_1_0.txt |
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| 4 | |
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| 5 | #include <boost/core/detail/string_view.hpp> |
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| 6 | #include <boost/core/lightweight_test_trait.hpp> |
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| 7 | #include <boost/config/pragma_message.hpp> |
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| 8 | #include <boost/config.hpp> |
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| 9 | #include <string> |
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| 10 | |
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| 11 | #if defined(BOOST_NO_CXX20_HDR_CONCEPTS) |
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| 12 | |
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| 13 | BOOST_PRAGMA_MESSAGE( "Skipping test because BOOST_NO_CXX20_HDR_CONCEPTS is defined" ) |
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| 14 | int main() {} |
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| 15 | |
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| 16 | #else |
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| 17 | |
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| 18 | #include <concepts> |
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| 19 | #include <type_traits> |
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| 20 | |
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| 21 | using T = std::common_reference_t< boost::core::string_view&&, std::string& >; |
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| 22 | |
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| 23 | static_assert( std::common_reference_with< boost::core::string_view&&, std::string& > ); |
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| 24 | static_assert( std::common_reference_with< boost::core::wstring_view&&, std::wstring const& > ); |
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| 25 | |
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| 26 | int main() |
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| 27 | { |
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| 28 | BOOST_TEST_TRAIT_SAME( std::common_reference_t< boost::core::string_view&&, std::string& >, boost::core::string_view ); |
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| 29 | BOOST_TEST_TRAIT_SAME( std::common_reference_t< boost::core::wstring_view&&, std::wstring const& >, boost::core::wstring_view ); |
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| 30 | |
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| 31 | return boost::report_errors(); |
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| 32 | } |
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| 33 | |
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| 34 | #endif |
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| 35 | |
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