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
11// class vector
12
13// size_type size() const noexcept;
14
15#include <vector>
16#include <cassert>
17
18#include "test_macros.h"
19#include "min_allocator.h"
20
21TEST_CONSTEXPR_CXX20 bool tests()
22{
23 {
24 typedef std::vector<int> C;
25 C c;
26 ASSERT_NOEXCEPT(c.size());
27 assert(c.size() == 0);
28 c.push_back(x: C::value_type(2));
29 assert(c.size() == 1);
30 c.push_back(x: C::value_type(1));
31 assert(c.size() == 2);
32 c.push_back(x: C::value_type(3));
33 assert(c.size() == 3);
34 c.erase(position: c.begin());
35 assert(c.size() == 2);
36 c.erase(position: c.begin());
37 assert(c.size() == 1);
38 c.erase(position: c.begin());
39 assert(c.size() == 0);
40 }
41#if TEST_STD_VER >= 11
42 {
43 typedef std::vector<int, min_allocator<int>> C;
44 C c;
45 ASSERT_NOEXCEPT(c.size());
46 assert(c.size() == 0);
47 c.push_back(C::value_type(2));
48 assert(c.size() == 1);
49 c.push_back(C::value_type(1));
50 assert(c.size() == 2);
51 c.push_back(C::value_type(3));
52 assert(c.size() == 3);
53 c.erase(c.begin());
54 assert(c.size() == 2);
55 c.erase(c.begin());
56 assert(c.size() == 1);
57 c.erase(c.begin());
58 assert(c.size() == 0);
59 }
60 {
61 typedef std::vector<int, safe_allocator<int>> C;
62 C c;
63 ASSERT_NOEXCEPT(c.size());
64 assert(c.size() == 0);
65 c.push_back(C::value_type(2));
66 assert(c.size() == 1);
67 c.push_back(C::value_type(1));
68 assert(c.size() == 2);
69 c.push_back(C::value_type(3));
70 assert(c.size() == 3);
71 c.erase(c.begin());
72 assert(c.size() == 2);
73 c.erase(c.begin());
74 assert(c.size() == 1);
75 c.erase(c.begin());
76 assert(c.size() == 0);
77 }
78#endif
79
80 return true;
81}
82
83int main(int, char**)
84{
85 tests();
86#if TEST_STD_VER > 17
87 static_assert(tests());
88#endif
89 return 0;
90}
91

source code of libcxx/test/std/containers/sequences/vector/vector.capacity/size.pass.cpp