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// void clear() noexcept;
16
17#include <cassert>
18#include <deque>
19#include <flat_map>
20#include <functional>
21#include <vector>
22
23#include "MinSequenceContainer.h"
24#include "../helpers.h"
25#include "test_macros.h"
26#include "min_allocator.h"
27
28// test noexcept
29
30template <class T>
31concept NoExceptClear = requires(T t) {
32 { t.clear() } noexcept;
33};
34
35static_assert(NoExceptClear<std::flat_multimap<int, int>>);
36#ifndef TEST_HAS_NO_EXCEPTIONS
37static_assert(
38 NoExceptClear<std::flat_multimap<int, int, std::less<int>, ThrowOnMoveContainer<int>, ThrowOnMoveContainer<int>>>);
39#endif
40
41template <class KeyContainer, class ValueContainer>
42void test() {
43 using Key = typename KeyContainer::value_type;
44 using Value = typename ValueContainer::value_type;
45 using M = std::flat_multimap<Key, Value, std::less<Key>, KeyContainer, ValueContainer>;
46
47 M m = {{5, 2}, {2, 1}, {2, 3}, {2, 1}, {5, 0}};
48 assert(m.size() == 5);
49 ASSERT_NOEXCEPT(m.clear());
50 ASSERT_SAME_TYPE(decltype(m.clear()), void);
51 m.clear();
52 assert(m.size() == 0);
53}
54
55int main(int, char**) {
56 test<std::vector<int>, std::vector<int>>();
57 test<std::vector<int>, std::vector<double>>();
58 test<std::deque<int>, std::vector<double>>();
59 test<MinSequenceContainer<int>, MinSequenceContainer<double>>();
60 test<std::vector<int, min_allocator<int>>, std::vector<double, min_allocator<double>>>();
61 test<std::vector<int, min_allocator<int>>, std::vector<int, min_allocator<int>>>();
62
63 return 0;
64}
65

source code of libcxx/test/std/containers/container.adaptors/flat.multimap/flat.multimap.modifiers/clear.pass.cpp