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- //===----------------------------------------------------------------------===//
- //
- // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
- // See https://llvm.org/LICENSE.txt for license information.
- // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
- //
- //===----------------------------------------------------------------------===//
- // <string_view>
- // constexpr basic_string_view(const _CharT* _s)
- // : __data (_s), __size(_Traits::length(_s)) {}
- #include <string_view>
- #include <string>
- #include <cassert>
- #include "test_macros.h"
- #include "constexpr_char_traits.h"
- template<typename CharT>
- size_t StrLen ( const CharT *s ) {
- size_t retVal = 0;
- while ( *s != 0 ) { ++retVal; ++s; }
- return retVal;
- }
- template<typename CharT>
- void test ( const CharT *s ) {
- typedef std::basic_string_view<CharT> SV;
- // I'd love to do this, but it would require traits::length() to be noexcept
- // LIBCPP_ASSERT_NOEXCEPT(SV(s));
- SV sv1 ( s );
- assert ( sv1.size() == StrLen( s ));
- assert ( sv1.data() == s );
- }
- int main(int, char**) {
- test ( "QBCDE" );
- test ( "A" );
- test ( "" );
- test ( L"QBCDE" );
- test ( L"A" );
- test ( L"" );
- #if TEST_STD_VER >= 11
- test ( u"QBCDE" );
- test ( u"A" );
- test ( u"" );
- test ( U"QBCDE" );
- test ( U"A" );
- test ( U"" );
- #endif
- #if TEST_STD_VER > 11
- {
- constexpr std::basic_string_view<char, constexpr_char_traits<char>> sv1 ( "ABCDE" );
- static_assert ( sv1.size() == 5, "");
- }
- #endif
- return 0;
- }
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