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// <forward_list>
10
11// void clear() noexcept;
12
13#include <forward_list>
14#include <cassert>
15#include <iterator>
16
17#include "test_macros.h"
18#include "../../../NotConstructible.h"
19#include "min_allocator.h"
20
21int main(int, char**)
22{
23 {
24 typedef NotConstructible T;
25 typedef std::forward_list<T> C;
26 C c;
27 ASSERT_NOEXCEPT(c.clear());
28 c.clear();
29 assert(std::distance(c.begin(), c.end()) == 0);
30 }
31 {
32 typedef int T;
33 typedef std::forward_list<T> C;
34 const T t[] = {0, 1, 2, 3, 4};
35 C c(std::begin(t), std::end(t));
36
37 ASSERT_NOEXCEPT(c.clear());
38 c.clear();
39 assert(std::distance(c.begin(), c.end()) == 0);
40
41 c.clear();
42 assert(std::distance(c.begin(), c.end()) == 0);
43 }
44#if TEST_STD_VER >= 11
45 {
46 typedef NotConstructible T;
47 typedef std::forward_list<T, min_allocator<T>> C;
48 C c;
49 ASSERT_NOEXCEPT(c.clear());
50 c.clear();
51 assert(std::distance(c.begin(), c.end()) == 0);
52 }
53 {
54 typedef int T;
55 typedef std::forward_list<T, min_allocator<T>> C;
56 const T t[] = {0, 1, 2, 3, 4};
57 C c(std::begin(t), std::end(t));
58
59 ASSERT_NOEXCEPT(c.clear());
60 c.clear();
61 assert(std::distance(c.begin(), c.end()) == 0);
62
63 c.clear();
64 assert(std::distance(c.begin(), c.end()) == 0);
65 }
66#endif
67
68 return 0;
69}
70

source code of libcxx/test/std/containers/sequences/forwardlist/forwardlist.modifiers/clear.pass.cpp