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// void pop_front()
12
13#include "asan_testing.h"
14#include <deque>
15#include <cassert>
16#include <cstddef>
17
18#include "test_macros.h"
19#include "min_allocator.h"
20
21template <class C>
22C
23make(int size, int start = 0 )
24{
25 const int b = 4096 / sizeof(int);
26 int init = 0;
27 if (start > 0)
28 {
29 init = (start+1) / b + ((start+1) % b != 0);
30 init *= b;
31 --init;
32 }
33 C c(init, 0);
34 for (int i = 0; i < init-start; ++i)
35 c.pop_back();
36 for (int i = 0; i < size; ++i)
37 c.push_back(i);
38 for (int i = 0; i < start; ++i)
39 c.pop_front();
40 return c;
41}
42
43template <class C>
44void
45test(C& c1)
46{
47 typedef typename C::iterator I;
48 std::size_t c1_osize = c1.size();
49 c1.pop_front();
50 assert(c1.size() == c1_osize - 1);
51 assert(static_cast<std::size_t>(std::distance(c1.begin(), c1.end())) == c1.size());
52 LIBCPP_ASSERT(is_double_ended_contiguous_container_asan_correct(c1));
53 I i = c1.begin();
54 for (int j = 1; static_cast<std::size_t>(j) < c1.size(); ++j, ++i)
55 assert(*i == j);
56}
57
58template <class C>
59void
60testN(int start, int N)
61{
62 if (N != 0)
63 {
64 C c1 = make<C>(N, start);
65 test(c1);
66 }
67}
68
69int main(int, char**)
70{
71 {
72 int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
73 const int N = sizeof(rng)/sizeof(rng[0]);
74 for (int i = 0; i < N; ++i)
75 for (int j = 0; j < N; ++j)
76 testN<std::deque<int> >(start: rng[i], N: rng[j]);
77 }
78#if TEST_STD_VER >= 11
79 {
80 int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
81 const int N = sizeof(rng)/sizeof(rng[0]);
82 for (int i = 0; i < N; ++i)
83 for (int j = 0; j < N; ++j)
84 testN<std::deque<int, min_allocator<int>> >(rng[i], rng[j]);
85 }
86#endif
87
88 return 0;
89}
90

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