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(size_type n, charT c); // constexpr since C++20
13
14 #include <string>
15 #include <cassert>
16
17 #include "test_macros.h"
18 #include "min_allocator.h"
19
20 template <class S>
21 TEST_CONSTEXPR_CXX20 void
test(S s,typename S::size_type n,typename S::value_type c,S expected)22 test(S s, typename S::size_type n, typename S::value_type c, S expected)
23 {
24 s.assign(n, c);
25 LIBCPP_ASSERT(s.__invariants());
26 assert(s == expected);
27 }
28
test()29 TEST_CONSTEXPR_CXX20 bool test() {
30 {
31 typedef std::string S;
32 test(S(), 0, 'a', S());
33 test(S(), 1, 'a', S(1, 'a'));
34 test(S(), 10, 'a', S(10, 'a'));
35 test(S(), 100, 'a', S(100, 'a'));
36
37 test(S("12345"), 0, 'a', S());
38 test(S("12345"), 1, 'a', S(1, 'a'));
39 test(S("12345"), 10, 'a', S(10, 'a'));
40
41 test(S("12345678901234567890"), 0, 'a', S());
42 test(S("12345678901234567890"), 1, 'a', S(1, 'a'));
43 test(S("12345678901234567890"), 10, 'a', S(10, 'a'));
44 }
45 #if TEST_STD_VER >= 11
46 {
47 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
48 test(S(), 0, 'a', S());
49 test(S(), 1, 'a', S(1, 'a'));
50 test(S(), 10, 'a', S(10, 'a'));
51 test(S(), 100, 'a', S(100, 'a'));
52
53 test(S("12345"), 0, 'a', S());
54 test(S("12345"), 1, 'a', S(1, 'a'));
55 test(S("12345"), 10, 'a', S(10, 'a'));
56
57 test(S("12345678901234567890"), 0, 'a', S());
58 test(S("12345678901234567890"), 1, 'a', S(1, 'a'));
59 test(S("12345678901234567890"), 10, 'a', S(10, 'a'));
60 }
61 #endif
62
63 return true;
64 }
65
main(int,char **)66 int main(int, char**)
67 {
68 test();
69 #if TEST_STD_VER > 17
70 static_assert(test());
71 #endif
72
73 return 0;
74 }
75