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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
// <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 ) {
std::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 ( "" );
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test ( L"QBCDE" );
test ( L"A" );
test ( L"" );
#endif
#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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