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// Copyright 2021, 2024 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/core/detail/string_view.hpp>
#include <boost/config.hpp>
#include <boost/config/pragma_message.hpp>
#if defined(BOOST_NO_CXX14_CONSTEXPR)
BOOST_PRAGMA_MESSAGE( "Test skipped because BOOST_NO_CXX14_CONSTEXPR is defined" )
int main() {}
#elif BOOST_CXX_VERSION < 201703L
// std::char_traits is not constexpr in C++14
BOOST_PRAGMA_MESSAGE( "Test skipped because BOOST_CXX_VERSION < 201703L" )
int main() {}
#elif defined(BOOST_LIBSTDCXX_VERSION) && BOOST_LIBSTDCXX_VERSION < 70300
// std::char_traits is not constexpr in libstdc++ 7.2
BOOST_PRAGMA_MESSAGE( "Test skipped because BOOST_LIBSTDCXX_VERSION < 70300" )
int main() {}
#else
#define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
int main()
{
{
constexpr char const* s = "";
constexpr boost::core::string_view sv( s );
STATIC_ASSERT( sv.data() == s );
STATIC_ASSERT( sv.size() == 0 );
STATIC_ASSERT( sv.begin() == sv.data() );
STATIC_ASSERT( sv.end() == sv.data() + sv.size() );
STATIC_ASSERT( sv.cbegin() == sv.data() );
STATIC_ASSERT( sv.cend() == sv.data() + sv.size() );
STATIC_ASSERT( sv.length() == sv.size() );
STATIC_ASSERT( sv.empty() == ( sv.size() == 0 ) );
STATIC_ASSERT( sv.max_size() == boost::core::string_view::npos );
}
{
constexpr char const* s = "123";
constexpr boost::core::string_view sv( s );
STATIC_ASSERT( sv.data() == s );
STATIC_ASSERT( sv.size() == 3 );
STATIC_ASSERT( sv.begin() == sv.data() );
STATIC_ASSERT( sv.end() == sv.data() + sv.size() );
STATIC_ASSERT( sv.cbegin() == sv.data() );
STATIC_ASSERT( sv.cend() == sv.data() + sv.size() );
STATIC_ASSERT( sv.length() == sv.size() );
STATIC_ASSERT( sv.empty() == ( sv.size() == 0 ) );
STATIC_ASSERT( sv.max_size() == boost::core::string_view::npos );
}
}
#endif
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