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// constexpr basic_string_view& operator=(const basic_string_view &) noexcept = default;
14
15#include <string_view>
16#include <cassert>
17
18#include "test_macros.h"
19
20template <typename T>
21#if TEST_STD_VER > 11
22constexpr
23#endif
24 bool
25 test(T sv0) {
26 T sv1;
27 sv1 = sv0;
28 // We can't just say "sv0 == sv1" here because string_view::compare
29 // isn't constexpr until C++17, and we want to support back to C++14
30 return sv0.size() == sv1.size() && sv0.data() == sv1.data();
31}
32
33int main(int, char**) {
34 assert(test<std::string_view>("1234"));
35#ifndef TEST_HAS_NO_CHAR8_T
36 assert(test<std::u8string_view>(u8"1234"));
37#endif
38#if TEST_STD_VER >= 11
39 assert(test<std::u16string_view>(u"1234"));
40 assert(test<std::u32string_view>(U"1234"));
41#endif
42#ifndef TEST_HAS_NO_WIDE_CHARACTERS
43 assert(test<std::wstring_view>(L"1234"));
44#endif
45
46#if TEST_STD_VER > 11
47 static_assert(test<std::string_view>({"abc", 3}), "");
48# ifndef TEST_HAS_NO_CHAR8_T
49 static_assert(test<std::u8string_view>({u8"abc", 3}), "");
50# endif
51 static_assert(test<std::u16string_view>({u"abc", 3}), "");
52 static_assert(test<std::u32string_view>({U"abc", 3}), "");
53# ifndef TEST_HAS_NO_WIDE_CHARACTERS
54 static_assert(test<std::wstring_view>({L"abc", 3}), "");
55# endif
56#endif
57
58 return 0;
59}
60

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