from_ptr_len.pass.cpp
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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, size_type _len)
// : __data (_s), __size(_len) {}
#include <string_view>
#include <string>
#include <cassert>
#include "test_macros.h"
template<typename CharT>
void test ( const CharT *s, size_t sz ) {
{
typedef std::basic_string_view<CharT> SV;
LIBCPP_ASSERT_NOEXCEPT(SV(s, sz));
SV sv1 ( s, sz );
assert ( sv1.size() == sz );
assert ( sv1.data() == s );
}
}
int main(int, char**) {
test ( "QBCDE", 5 );
test ( "QBCDE", 2 );
test ( "", 0 );
#if TEST_STD_VER > 11
{
constexpr const char *s = "QBCDE";
constexpr std::basic_string_view<char> sv1 ( s, 2 );
static_assert ( sv1.size() == 2, "" );
static_assert ( sv1.data() == s, "" );
}
#endif
test ( L"QBCDE", 5 );
test ( L"QBCDE", 2 );
test ( L"", 0 );
#if TEST_STD_VER > 11
{
constexpr const wchar_t *s = L"QBCDE";
constexpr std::basic_string_view<wchar_t> sv1 ( s, 2 );
static_assert ( sv1.size() == 2, "" );
static_assert ( sv1.data() == s, "" );
}
#endif
#if TEST_STD_VER >= 11
test ( u"QBCDE", 5 );
test ( u"QBCDE", 2 );
test ( u"", 0 );
#if TEST_STD_VER > 11
{
constexpr const char16_t *s = u"QBCDE";
constexpr std::basic_string_view<char16_t> sv1 ( s, 2 );
static_assert ( sv1.size() == 2, "" );
static_assert ( sv1.data() == s, "" );
}
#endif
test ( U"QBCDE", 5 );
test ( U"QBCDE", 2 );
test ( U"", 0 );
#if TEST_STD_VER > 11
{
constexpr const char32_t *s = U"QBCDE";
constexpr std::basic_string_view<char32_t> sv1 ( s, 2 );
static_assert ( sv1.size() == 2, "" );
static_assert ( sv1.data() == s, "" );
}
#endif
#endif
return 0;
}