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// void clear(); // constexpr since C++20
12
13#include <string>
14#include <cassert>
15
16#include "test_macros.h"
17#include "min_allocator.h"
18#include "asan_testing.h"
19
20template <class S>
21TEST_CONSTEXPR_CXX20 void test(S s) {
22 s.clear();
23 assert(s.size() == 0);
24 LIBCPP_ASSERT(is_string_asan_correct(s));
25}
26
27template <class S>
28TEST_CONSTEXPR_CXX20 void test_string() {
29 S s;
30 test(s);
31 LIBCPP_ASSERT(is_string_asan_correct(s));
32
33 s.assign(10, 'a');
34 s.erase(5);
35 LIBCPP_ASSERT(is_string_asan_correct(s));
36 test(s);
37 LIBCPP_ASSERT(is_string_asan_correct(s));
38
39 s.assign(100, 'a');
40 s.erase(50);
41 LIBCPP_ASSERT(is_string_asan_correct(s));
42 test(s);
43 LIBCPP_ASSERT(is_string_asan_correct(s));
44}
45
46TEST_CONSTEXPR_CXX20 bool test() {
47 test_string<std::string>();
48#if TEST_STD_VER >= 11
49 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
50 test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();
51#endif
52
53 return true;
54}
55
56int main(int, char**) {
57 test();
58#if TEST_STD_VER > 17
59 static_assert(test());
60#endif
61
62 return 0;
63}
64

source code of libcxx/test/std/strings/basic.string/string.capacity/clear.pass.cpp