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 resize(size_type n);
12
13#include "asan_testing.h"
14#include <deque>
15#include <algorithm>
16#include <iterator>
17#include <cassert>
18#include <cstddef>
19
20#include "test_macros.h"
21#include "min_allocator.h"
22
23template <class C>
24C
25make(int size, int start = 0 )
26{
27 const int b = 4096 / sizeof(int);
28 int init = 0;
29 if (start > 0)
30 {
31 init = (start+1) / b + ((start+1) % b != 0);
32 init *= b;
33 --init;
34 }
35 C c(init, 0);
36 for (int i = 0; i < init-start; ++i)
37 c.pop_back();
38 LIBCPP_ASSERT(is_double_ended_contiguous_container_asan_correct(c));
39 for (int i = 0; i < size; ++i)
40 c.push_back(i);
41 LIBCPP_ASSERT(is_double_ended_contiguous_container_asan_correct(c));
42 for (int i = 0; i < start; ++i)
43 c.pop_front();
44 LIBCPP_ASSERT(is_double_ended_contiguous_container_asan_correct(c));
45 return c;
46}
47
48template <class C>
49void
50test(C& c1, int size)
51{
52 typedef typename C::const_iterator CI;
53 typename C::size_type c1_osize = c1.size();
54 c1.resize(size);
55 assert(c1.size() == static_cast<std::size_t>(size));
56 assert(static_cast<std::size_t>(std::distance(c1.begin(), c1.end())) == c1.size());
57 LIBCPP_ASSERT(is_double_ended_contiguous_container_asan_correct(c1));
58 CI i = c1.begin();
59 for (int j = 0; static_cast<std::size_t>(j) < std::min(c1_osize, c1.size()); ++j, ++i)
60 assert(*i == j);
61 for (std::size_t j = c1_osize; j < c1.size(); ++j, ++i)
62 assert(*i == 0);
63}
64
65template <class C>
66void
67testN(int start, int N, int M)
68{
69 C c1 = make<C>(N, start);
70 test(c1, M);
71}
72
73int main(int, char**)
74{
75 {
76 int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
77 const int N = sizeof(rng)/sizeof(rng[0]);
78 for (int i = 0; i < N; ++i)
79 for (int j = 0; j < N; ++j)
80 for (int k = 0; k < N; ++k)
81 testN<std::deque<int> >(start: rng[i], N: rng[j], M: rng[k]);
82 }
83#if TEST_STD_VER >= 11
84 {
85 int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
86 const int N = sizeof(rng)/sizeof(rng[0]);
87 for (int i = 0; i < N; ++i)
88 for (int j = 0; j < N; ++j)
89 for (int k = 0; k < N; ++k)
90 testN<std::deque<int, min_allocator<int>>>(rng[i], rng[j], rng[k]);
91 }
92 {
93 int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
94 const int N = sizeof(rng)/sizeof(rng[0]);
95 for (int i = 0; i < N; ++i)
96 for (int j = 0; j < N; ++j)
97 for (int k = 0; k < N; ++k)
98 testN<std::deque<int, safe_allocator<int>>>(rng[i], rng[j], rng[k]);
99 }
100#endif
101
102 return 0;
103}
104

source code of libcxx/test/std/containers/sequences/deque/deque.capacity/resize_size.pass.cpp