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>&
12 // operator=(const basic_string<charT,traits,Allocator>& str); // constexpr since C++20
13
14 #include <string>
15 #include <cassert>
16
17 #include "test_macros.h"
18 #include "min_allocator.h"
19 #include "asan_testing.h"
20
21 template <class S>
test(S s1,const S & s2)22 TEST_CONSTEXPR_CXX20 void test(S s1, const S& s2) {
23 s1 = s2;
24 LIBCPP_ASSERT(s1.__invariants());
25 assert(s1 == s2);
26 assert(s1.capacity() >= s1.size());
27 LIBCPP_ASSERT(is_string_asan_correct(s1));
28 LIBCPP_ASSERT(is_string_asan_correct(s2));
29 }
30
31 template <class S>
test_string()32 TEST_CONSTEXPR_CXX20 void test_string() {
33 test(S(), S());
34 test(S("1"), S());
35 test(S(), S("1"));
36 test(S("1"), S("2"));
37 test(S("1"), S("2"));
38
39 test(S(), S("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
40 test(S("123456789"), S("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
41 test(S("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"), S("123456789"));
42 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"),
43 S("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
44 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"
45 "1234567890123456789012345678901234567890123456789012345678901234567890"),
46 S("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
47 }
48
test()49 TEST_CONSTEXPR_CXX20 bool test() {
50 test_string<std::string>();
51 #if TEST_STD_VER >= 11
52 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
53 test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();
54 #endif
55
56 #if TEST_STD_VER >= 11
57 { // LWG 2946
58 std::string s;
59 s = {"abc", 1};
60 assert(s.size() == 1);
61 assert(s == "a");
62 }
63 #endif
64
65 return true;
66 }
67
main(int,char **)68 int main(int, char**) {
69 test();
70 #if TEST_STD_VER > 17
71 static_assert(test());
72 #endif
73
74 return 0;
75 }
76