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// bool empty() 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 typedef std::vector<int> C;
24 C c;
25 ASSERT_NOEXCEPT(c.empty());
26 assert(c.empty());
27 c.push_back(x: C::value_type(1));
28 assert(!c.empty());
29 c.clear();
30 assert(c.empty());
31 }
32#if TEST_STD_VER >= 11
33 {
34 typedef std::vector<int, min_allocator<int>> C;
35 C c;
36 ASSERT_NOEXCEPT(c.empty());
37 assert(c.empty());
38 c.push_back(C::value_type(1));
39 assert(!c.empty());
40 c.clear();
41 assert(c.empty());
42 }
43 {
44 typedef std::vector<int, safe_allocator<int>> C;
45 C c;
46 ASSERT_NOEXCEPT(c.empty());
47 assert(c.empty());
48 c.push_back(C::value_type(1));
49 assert(!c.empty());
50 c.clear();
51 assert(c.empty());
52 }
53#endif
54
55 return true;
56}
57
58int main(int, char**) {
59 tests();
60#if TEST_STD_VER > 17
61 static_assert(tests());
62#endif
63 return 0;
64}
65

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