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// <vector>
10// vector<bool>
11
12// void reserve(size_type n);
13
14#include <vector>
15#include <cassert>
16#include <stdexcept>
17
18#include "test_macros.h"
19#include "min_allocator.h"
20#include "test_allocator.h"
21
22TEST_CONSTEXPR_CXX20 bool tests() {
23 {
24 std::vector<bool> v;
25 v.reserve(n: 10);
26 assert(v.capacity() >= 10);
27 }
28 {
29 std::vector<bool> v(100);
30 assert(v.capacity() >= 100);
31 v.reserve(n: 50);
32 assert(v.size() == 100);
33 assert(v.capacity() >= 100);
34 v.reserve(n: 150);
35 assert(v.size() == 100);
36 assert(v.capacity() >= 150);
37 }
38#if TEST_STD_VER >= 11
39 {
40 std::vector<bool, min_allocator<bool>> v;
41 v.reserve(10);
42 assert(v.capacity() >= 10);
43 }
44 {
45 std::vector<bool, explicit_allocator<bool>> v;
46 v.reserve(10);
47 assert(v.capacity() >= 10);
48 }
49 {
50 std::vector<bool, min_allocator<bool>> v(100);
51 assert(v.capacity() >= 100);
52 v.reserve(50);
53 assert(v.size() == 100);
54 assert(v.capacity() >= 100);
55 v.reserve(150);
56 assert(v.size() == 100);
57 assert(v.capacity() >= 150);
58 }
59#endif
60#ifndef TEST_HAS_NO_EXCEPTIONS
61 if (!TEST_IS_CONSTANT_EVALUATED) {
62 std::vector<bool, limited_allocator<bool, 10> > v;
63 v.reserve(5);
64 try {
65 // A typical implementation would allocate chunks of bits.
66 // In libc++ the chunk has the same size as the machine word. It is
67 // reasonable to assume that in practice no implementation would use
68 // 64 kB or larger chunks.
69 v.reserve(10 * 65536);
70 assert(false);
71 } catch (const std::length_error&) {
72 // no-op
73 }
74 assert(v.capacity() >= 5);
75 }
76#endif
77
78 return true;
79}
80
81int main(int, char**) {
82 tests();
83#if TEST_STD_VER > 17
84 static_assert(tests());
85#endif
86 return 0;
87}
88

source code of libcxx/test/std/containers/sequences/vector.bool/reserve.pass.cpp