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// <string>
10
11// allocator_type get_allocator() const; // constexpr since C++20
12
13#include <string>
14#include <cassert>
15
16#include "test_macros.h"
17#include "test_allocator.h"
18#include "min_allocator.h"
19
20template <class S>
21TEST_CONSTEXPR_CXX20 void test(const S& s, const typename S::allocator_type& a) {
22 assert(s.get_allocator() == a);
23}
24
25template <class Alloc>
26TEST_CONSTEXPR_CXX20 void test_string(const Alloc& a) {
27 using S = std::basic_string<char, std::char_traits<char>, Alloc>;
28 test(S(""), Alloc());
29 test(S("abcde", Alloc(a)), Alloc(a));
30 test(S("abcdefghij", Alloc(a)), Alloc(a));
31 test(S("abcdefghijklmnopqrst", Alloc(a)), Alloc(a));
32}
33
34TEST_CONSTEXPR_CXX20 bool test() {
35 test_string(std::allocator<char>());
36 test_string(test_allocator<char>());
37 test_string(test_allocator<char>(1));
38 test_string(test_allocator<char>(2));
39 test_string(test_allocator<char>(3));
40#if TEST_STD_VER >= 11
41 test_string(min_allocator<char>());
42#endif
43
44 return true;
45}
46
47int main(int, char**) {
48 test();
49#if TEST_STD_VER > 17
50 static_assert(test());
51#endif
52
53 return 0;
54}
55

source code of libcxx/test/std/strings/basic.string/string.ops/string.accessors/get_allocator.pass.cpp