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 // basic_string<charT,traits,Allocator>& operator=(charT c); // constexpr since C++20
12
13 #include <string>
14 #include <cassert>
15
16 #include "test_macros.h"
17 #include "min_allocator.h"
18 #include "asan_testing.h"
19
20 template <class S>
test(S s1,typename S::value_type s2)21 TEST_CONSTEXPR_CXX20 void test(S s1, typename S::value_type s2) {
22 typedef typename S::traits_type T;
23 s1 = s2;
24 LIBCPP_ASSERT(s1.__invariants());
25 assert(s1.size() == 1);
26 assert(T::eq(s1[0], s2));
27 assert(s1.capacity() >= s1.size());
28 LIBCPP_ASSERT(is_string_asan_correct(s1));
29 }
30
31 template <class S>
test_string()32 TEST_CONSTEXPR_CXX20 void test_string() {
33 test(S(), 'a');
34 test(S("1"), 'a');
35 test(S("123456789"), 'a');
36 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"), 'a');
37 }
38
test()39 TEST_CONSTEXPR_CXX20 bool test() {
40 test_string<std::string>();
41 #if TEST_STD_VER >= 11
42 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
43 test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();
44 #endif
45
46 return true;
47 }
48
main(int,char **)49 int main(int, char**) {
50 test();
51 #if TEST_STD_VER > 17
52 static_assert(test());
53 #endif
54
55 return 0;
56 }
57