1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// <flat_map>
// [[nodiscard]] bool empty() const noexcept;
#include <flat_map>
#include <cassert>
#include <deque>
#include <functional>
#include <utility>
#include <vector>
#include "MinSequenceContainer.h"
#include "test_macros.h"
#include "min_allocator.h"
template <class KeyContainer, class ValueContainer>
constexpr void test() {
using Key = typename KeyContainer::value_type;
using Value = typename ValueContainer::value_type;
using M = std::flat_map<Key, Value, std::less<int>, KeyContainer, ValueContainer>;
M m;
ASSERT_SAME_TYPE(decltype(m.empty()), bool);
ASSERT_NOEXCEPT(m.empty());
assert(m.empty());
assert(std::as_const(m).empty());
m = {{1, 1.0}};
assert(!m.empty());
m.clear();
assert(m.empty());
}
constexpr bool test() {
test<std::vector<int>, std::vector<double>>();
#ifndef __cpp_lib_constexpr_deque
if (!TEST_IS_CONSTANT_EVALUATED)
#endif
{
test<std::deque<int>, std::vector<double>>();
}
test<MinSequenceContainer<int>, MinSequenceContainer<double>>();
test<std::vector<int, min_allocator<int>>, std::vector<double, min_allocator<double>>>();
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER >= 26
static_assert(test());
#endif
return 0;
}
|
