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
20 template <class S>
test(const S & s,const typename S::allocator_type & a)21 TEST_CONSTEXPR_CXX20 void test(const S& s, const typename S::allocator_type& a) {
22 assert(s.get_allocator() == a);
23 }
24
25 template <class Alloc>
test_string(const Alloc & a)26 TEST_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
test()34 TEST_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
main(int,char **)47 int main(int, char**) {
48 test();
49 #if TEST_STD_VER > 17
50 static_assert(test());
51 #endif
52
53 return 0;
54 }
55