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: c++03, c++11, c++14
10// TODO: Change to XFAIL once https://github.com/llvm/llvm-project/issues/40340 is fixed
11// UNSUPPORTED: availability-pmr-missing
12
13// <string>
14
15// namespace std::pmr {
16// template <class Char, class Traits = ...>
17// using basic_string =
18// ::std::basic_string<Char, Traits, polymorphic_allocator<Char>>
19//
20// typedef ... string
21// typedef ... u16string
22// typedef ... u32string
23// typedef ... wstring
24//
25// } // namespace std::pmr
26
27#include <string>
28#include <cassert>
29#include <memory_resource>
30#include <type_traits>
31
32#include "constexpr_char_traits.h"
33#include "test_macros.h"
34
35template <class Char, class PmrTypedef>
36void test_string_typedef() {
37 using StdStr = std::basic_string<Char, std::char_traits<Char>, std::pmr::polymorphic_allocator<Char>>;
38 using PmrStr = std::pmr::basic_string<Char>;
39 static_assert(std::is_same<StdStr, PmrStr>::value, "");
40 static_assert(std::is_same<PmrStr, PmrTypedef>::value, "");
41}
42
43template <class Char, class Traits>
44void test_basic_string_alias() {
45 using StdStr = std::basic_string<Char, Traits, std::pmr::polymorphic_allocator<Char>>;
46 using PmrStr = std::pmr::basic_string<Char, Traits>;
47 static_assert(std::is_same<StdStr, PmrStr>::value, "");
48}
49
50int main(int, char**) {
51 {
52 test_string_typedef<char, std::pmr::string>();
53#ifndef TEST_HAS_NO_WIDE_CHARACTERS
54 test_string_typedef<wchar_t, std::pmr::wstring>();
55#endif
56 test_string_typedef<char16_t, std::pmr::u16string>();
57 test_string_typedef<char32_t, std::pmr::u32string>();
58 }
59 {
60 test_basic_string_alias<char, constexpr_char_traits<char>>();
61#ifndef TEST_HAS_NO_WIDE_CHARACTERS
62 test_basic_string_alias<wchar_t, constexpr_char_traits<wchar_t>>();
63#endif
64 test_basic_string_alias<char16_t, constexpr_char_traits<char16_t>>();
65 test_basic_string_alias<char32_t, constexpr_char_traits<char32_t>>();
66 }
67 {
68 // Check that std::basic_string has been included and is complete.
69 std::pmr::string s;
70 assert(s.get_allocator().resource() == std::pmr::get_default_resource());
71 }
72
73 return 0;
74}
75

source code of libcxx/test/std/utilities/utility/mem.res/mem.res.aliases/header_string_synop.pass.cpp