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// assign(basic_string<charT,traits>&& str); // constexpr since C++20
13
14#include <string>
15#include <utility>
16#include <cassert>
17
18#include "test_macros.h"
19#include "min_allocator.h"
20
21template <class S>
22TEST_CONSTEXPR_CXX20 void test(S s, S str, S expected) {
23 s.assign(std::move(str));
24 LIBCPP_ASSERT(s.__invariants());
25 assert(s == expected);
26}
27
28template <class S>
29TEST_CONSTEXPR_CXX20 void test_string() {
30 test(S(), S(), S());
31 test(S(), S("12345"), S("12345"));
32 test(S(), S("1234567890"), S("1234567890"));
33 test(S(), S("12345678901234567890"), S("12345678901234567890"));
34
35 test(S("12345"), S(), S());
36 test(S("12345"), S("12345"), S("12345"));
37 test(S("12345"), S("1234567890"), S("1234567890"));
38 test(S("12345"), S("12345678901234567890"), S("12345678901234567890"));
39
40 test(S("1234567890"), S(), S());
41 test(S("1234567890"), S("12345"), S("12345"));
42 test(S("1234567890"), S("1234567890"), S("1234567890"));
43 test(S("1234567890"), S("12345678901234567890"), S("12345678901234567890"));
44
45 test(S("12345678901234567890"), S(), S());
46 test(S("12345678901234567890"), S("12345"), S("12345"));
47 test(S("12345678901234567890"), S("1234567890"), S("1234567890"));
48 test(S("12345678901234567890"), S("12345678901234567890"), S("12345678901234567890"));
49}
50
51TEST_CONSTEXPR_CXX20 bool test() {
52 test_string<std::string>();
53#if TEST_STD_VER >= 11
54 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
55#endif
56
57 return true;
58}
59
60int main(int, char**) {
61 test();
62#if TEST_STD_VER > 17
63 static_assert(test());
64#endif
65
66 return 0;
67}
68

source code of libcxx/test/std/strings/basic.string/string.modifiers/string_assign/rv_string.pass.cpp