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// <deque>
10
11// iterator erase(const_iterator f)
12
13// Erasing items from the beginning or the end of a deque shall not invalidate iterators
14// to items that were not erased.
15
16#include "asan_testing.h"
17#include <deque>
18#include <cassert>
19
20#include "test_macros.h"
21
22template <typename C>
23void del_at_start(C c) {
24 typename C::iterator first = c.begin();
25 typename C::iterator it1 = first + 1;
26 typename C::iterator it2 = c.end() - 1;
27
28 c.erase(first);
29
30 typename C::iterator it3 = c.begin();
31 typename C::iterator it4 = c.end() - 1;
32 assert(it1 == it3);
33 assert(*it1 == *it3);
34 assert(&*it1 == &*it3);
35 assert(it2 == it4);
36 assert(*it2 == *it4);
37 assert(&*it2 == &*it4);
38}
39
40template <typename C>
41void del_at_end(C c) {
42 typename C::iterator first = c.end() - 1;
43 typename C::iterator it1 = c.begin();
44 typename C::iterator it2 = first - 1;
45
46 c.erase(first);
47
48 typename C::iterator it3 = c.begin();
49 typename C::iterator it4 = c.end() - 1;
50 assert(it1 == it3);
51 assert(*it1 == *it3);
52 assert(&*it1 == &*it3);
53 assert(it2 == it4);
54 assert(*it2 == *it4);
55 assert(&*it2 == &*it4);
56 LIBCPP_ASSERT(is_double_ended_contiguous_container_asan_correct(c));
57}
58
59int main(int, char**) {
60 std::deque<int> queue;
61 for (int i = 0; i < 20; ++i)
62 queue.push_back(i);
63
64 while (queue.size() > 1) {
65 del_at_start(queue);
66 del_at_end(queue);
67 queue.pop_back();
68 }
69
70 return 0;
71}
72

source code of libcxx/test/std/containers/sequences/deque/deque.modifiers/erase_iter.invalidation.pass.cpp