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 #include "asan_testing.h"
20
21 template <class S>
test(S s,typename S::size_type n,typename S::value_type c,S expected)22 TEST_CONSTEXPR_CXX20 void test(S s, typename S::size_type n, typename S::value_type c, S expected) {
23 s.assign(n, c);
24 LIBCPP_ASSERT(s.__invariants());
25 assert(s == expected);
26 LIBCPP_ASSERT(is_string_asan_correct(s));
27 }
28
29 template <class S>
test_string()30 TEST_CONSTEXPR_CXX20 void test_string() {
31 test(S(), 0, 'a', S());
32 test(S(), 1, 'a', S(1, 'a'));
33 test(S(), 10, 'a', S(10, 'a'));
34 test(S(), 100, 'a', S(100, 'a'));
35
36 test(S("12345"), 0, 'a', S());
37 test(S("12345"), 1, 'a', S(1, 'a'));
38 test(S("12345"), 10, 'a', S(10, 'a'));
39
40 test(S("12345678901234567890"), 0, 'a', S());
41 test(S("12345678901234567890"), 1, 'a', S(1, 'a'));
42 test(S("12345678901234567890"), 10, 'a', S(10, 'a'));
43 }
44
test()45 TEST_CONSTEXPR_CXX20 bool test() {
46 test_string<std::string>();
47 #if TEST_STD_VER >= 11
48 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
49 test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();
50 #endif
51
52 return true;
53 }
54
main(int,char **)55 int main(int, char**) {
56 test();
57 #if TEST_STD_VER > 17
58 static_assert(test());
59 #endif
60
61 return 0;
62 }
63