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 {
25 std::vector<bool> v;
26 v.reserve(n: 10);
27 assert(v.capacity() >= 10);
28 }
29 {
30 std::vector<bool> v(100);
31 assert(v.capacity() >= 100);
32 v.reserve(n: 50);
33 assert(v.size() == 100);
34 assert(v.capacity() >= 100);
35 v.reserve(n: 150);
36 assert(v.size() == 100);
37 assert(v.capacity() >= 150);
38 }
39#if TEST_STD_VER >= 11
40 {
41 std::vector<bool, min_allocator<bool>> v;
42 v.reserve(10);
43 assert(v.capacity() >= 10);
44 }
45 {
46 std::vector<bool, explicit_allocator<bool>> v;
47 v.reserve(10);
48 assert(v.capacity() >= 10);
49 }
50 {
51 std::vector<bool, min_allocator<bool>> v(100);
52 assert(v.capacity() >= 100);
53 v.reserve(50);
54 assert(v.size() == 100);
55 assert(v.capacity() >= 100);
56 v.reserve(150);
57 assert(v.size() == 100);
58 assert(v.capacity() >= 150);
59 }
60#endif
61#ifndef TEST_HAS_NO_EXCEPTIONS
62 if (!TEST_IS_CONSTANT_EVALUATED) {
63 std::vector<bool, limited_allocator<bool, 10> > v;
64 v.reserve(5);
65 try {
66 // A typical implementation would allocate chunks of bits.
67 // In libc++ the chunk has the same size as the machine word. It is
68 // reasonable to assume that in practice no implementation would use
69 // 64 kB or larger chunks.
70 v.reserve(10 * 65536);
71 assert(false);
72 } catch (const std::length_error&) {
73 // no-op
74 }
75 assert(v.capacity() >= 5);
76 }
77#endif
78
79 return true;
80}
81
82int main(int, char**)
83{
84 tests();
85#if TEST_STD_VER > 17
86 static_assert(tests());
87#endif
88 return 0;
89}
90

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