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 // template<class charT, class traits, class Allocator>
12 // void swap(basic_string<charT,traits,Allocator>& lhs,
13 // basic_string<charT,traits,Allocator>& rhs); // constexpr since C++20
14
15 #include <string>
16 #include <stdexcept>
17 #include <algorithm>
18 #include <cassert>
19
20 #include "test_macros.h"
21 #include "min_allocator.h"
22 #include "asan_testing.h"
23
24 template <class S>
test(S s1,S s2)25 TEST_CONSTEXPR_CXX20 void test(S s1, S s2) {
26 S s1_ = s1;
27 S s2_ = s2;
28 swap(s1, s2);
29 LIBCPP_ASSERT(s1.__invariants());
30 LIBCPP_ASSERT(s2.__invariants());
31 assert(s1 == s2_);
32 assert(s2 == s1_);
33 LIBCPP_ASSERT(is_string_asan_correct(s1));
34 LIBCPP_ASSERT(is_string_asan_correct(s2));
35 }
36
37 template <class S>
test_string()38 TEST_CONSTEXPR_CXX20 void test_string() {
39 test(S(""), S(""));
40 test(S(""), S("12345"));
41 test(S(""), S("1234567890"));
42 test(S(""), S("12345678901234567890"));
43 test(S("abcde"), S(""));
44 test(S("abcde"), S("12345"));
45 test(S("abcde"), S("1234567890"));
46 test(S("abcde"), S("12345678901234567890"));
47 test(S("abcdefghij"), S(""));
48 test(S("abcdefghij"), S("12345"));
49 test(S("abcdefghij"), S("1234567890"));
50 test(S("abcdefghij"), S("12345678901234567890"));
51 test(S("abcdefghijklmnopqrst"), S(""));
52 test(S("abcdefghijklmnopqrst"), S("12345"));
53 test(S("abcdefghijklmnopqrst"), S("1234567890"));
54 test(S("abcdefghijklmnopqrst"), S("12345678901234567890"));
55 test(S("abcdefghijklmnopqrst123456LONG1234567890"), S(""));
56 test(S("abcdefghijklmnopqrst123456LONG1234567890"), S("12345"));
57 test(S("abcdefghijklmnopqrst123456LONG1234567890"), S("1234567890"));
58 test(S("abcdefghijklmnopqrst123456LONG1234567890"), S("12345678901234567890"));
59 }
60
test()61 TEST_CONSTEXPR_CXX20 bool test() {
62 test_string<std::string>();
63 #if TEST_STD_VER >= 11
64 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
65 test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char> > >();
66 #endif
67
68 return true;
69 }
70
main(int,char **)71 int main(int, char**) {
72 test();
73 #if TEST_STD_VER > 17
74 static_assert(test());
75 #endif
76
77 return 0;
78 }
79