1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
10
11// <string_view>
12
13// template<class Allocator>
14// basic_string_view(const basic_string<_CharT, _Traits, Allocator>& _str) noexcept
15
16#include <string_view>
17#include <string>
18#include <cassert>
19
20#include "test_macros.h"
21
22struct dummy_char_traits : public std::char_traits<char> {};
23
24template <typename CharT, typename Traits>
25void test(const std::basic_string<CharT, Traits>& str) {
26 typedef std::basic_string_view<CharT, Traits> SV;
27 ASSERT_NOEXCEPT(SV(str));
28
29 SV sv1(str);
30 assert(sv1.size() == str.size());
31 assert(sv1.data() == str.data());
32}
33
34int main(int, char**) {
35 test(std::string("QBCDE"));
36 test(std::string(""));
37 test(std::string());
38
39#ifndef TEST_HAS_NO_WIDE_CHARACTERS
40 test(std::wstring(L"QBCDE"));
41 test(std::wstring(L""));
42 test(std::wstring());
43#endif
44
45#ifndef TEST_HAS_NO_CHAR8_T
46 test(std::u8string{u8"QBCDE"});
47 test(std::u8string{u8""});
48 test(std::u8string{});
49#endif
50
51#if TEST_STD_VER >= 11
52 test(std::u16string{u"QBCDE"});
53 test(std::u16string{u""});
54 test(std::u16string{});
55
56 test(std::u32string{U"QBCDE"});
57 test(std::u32string{U""});
58 test(std::u32string{});
59#endif
60
61 test(std::basic_string<char, dummy_char_traits>("QBCDE"));
62 test(std::basic_string<char, dummy_char_traits>(""));
63 test(std::basic_string<char, dummy_char_traits>());
64
65 return 0;
66}
67

source code of libcxx/test/std/strings/string.view/string.view.cons/from_string.pass.cpp