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// <unordered_map>
10
11// template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
12// class Alloc = allocator<pair<const Key, T>>>
13// class unordered_map
14
15// void clear() noexcept;
16
17#include <unordered_map>
18#include <string>
19#include <cassert>
20
21#include "test_macros.h"
22#include "min_allocator.h"
23
24int main(int, char**)
25{
26 {
27 typedef std::unordered_map<int, std::string> C;
28 typedef std::pair<int, std::string> P;
29 P a[] =
30 {
31 P(1, "one"),
32 P(2, "two"),
33 P(3, "three"),
34 P(4, "four"),
35 P(1, "four"),
36 P(2, "four"),
37 };
38 C c(a, a + sizeof(a)/sizeof(a[0]));
39 ASSERT_NOEXCEPT(c.clear());
40 c.clear();
41 assert(c.size() == 0);
42 }
43#if TEST_STD_VER >= 11
44 {
45 typedef std::unordered_map<int, std::string, std::hash<int>, std::equal_to<int>,
46 min_allocator<std::pair<const int, std::string>>> C;
47 typedef std::pair<int, std::string> P;
48 P a[] =
49 {
50 P(1, "one"),
51 P(2, "two"),
52 P(3, "three"),
53 P(4, "four"),
54 P(1, "four"),
55 P(2, "four"),
56 };
57 C c(a, a + sizeof(a)/sizeof(a[0]));
58 ASSERT_NOEXCEPT(c.clear());
59 c.clear();
60 assert(c.size() == 0);
61 }
62#endif
63
64 return 0;
65}
66

source code of libcxx/test/std/containers/unord/unord.map/unord.map.modifiers/clear.pass.cpp