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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
10
11// <flat_map>
12
13// class flat_multimap
14
15// [[nodiscard]] bool empty() const noexcept;
16
17#include <flat_map>
18#include <cassert>
19#include <deque>
20#include <functional>
21#include <utility>
22#include <vector>
23
24#include "MinSequenceContainer.h"
25#include "test_macros.h"
26#include "min_allocator.h"
27
28template <class KeyContainer, class ValueContainer>
29void test() {
30 using Key = typename KeyContainer::value_type;
31 using Value = typename ValueContainer::value_type;
32 using M = std::flat_multimap<Key, Value, std::less<int>, KeyContainer, ValueContainer>;
33 M m;
34 ASSERT_SAME_TYPE(decltype(m.empty()), bool);
35 ASSERT_NOEXCEPT(m.empty());
36 assert(m.empty());
37 assert(std::as_const(m).empty());
38 m = {{1, 1.0}, {1, 2.0}};
39 assert(!m.empty());
40 m.clear();
41 assert(m.empty());
42}
43
44int main(int, char**) {
45 test<std::vector<int>, std::vector<double>>();
46 test<std::deque<int>, std::vector<double>>();
47 test<MinSequenceContainer<int>, MinSequenceContainer<double>>();
48 test<std::vector<int, min_allocator<int>>, std::vector<double, min_allocator<double>>>();
49
50 return 0;
51}
52

source code of libcxx/test/std/containers/container.adaptors/flat.multimap/flat.multimap.capacity/empty.pass.cpp