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
10
11// <unordered_map>
12
13// template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
14// class Alloc = allocator<pair<const Key, T>>>
15// class unordered_multimap
16
17// template <class... Args>
18// iterator emplace_hint(const_iterator p, Args&&... args);
19
20#include <unordered_map>
21#include <cassert>
22#include <iterator>
23
24#include "../../../Emplaceable.h"
25#include "min_allocator.h"
26#include "test_macros.h"
27
28int main(int, char**) {
29 {
30 typedef std::unordered_multimap<int, Emplaceable> C;
31 typedef C::iterator R;
32 C c;
33 C::const_iterator e = c.end();
34 R r = c.emplace_hint(e, std::piecewise_construct, std::forward_as_tuple(args: 3), std::forward_as_tuple());
35 assert(c.size() == 1);
36 assert(r->first == 3);
37 assert(r->second == Emplaceable());
38
39 r = c.emplace_hint(c.end(), std::pair<const int, Emplaceable>(3, Emplaceable(5, 6)));
40 assert(c.size() == 2);
41 assert(r->first == 3);
42 assert(r->second == Emplaceable(5, 6));
43 LIBCPP_ASSERT(r == std::next(c.begin()));
44
45 r = c.emplace_hint(r, std::piecewise_construct, std::forward_as_tuple(args: 3), std::forward_as_tuple(args: 6, args: 7));
46 assert(c.size() == 3);
47 assert(r->first == 3);
48 assert(r->second == Emplaceable(6, 7));
49 LIBCPP_ASSERT(r == std::next(c.begin()));
50 r = c.begin();
51 assert(r->first == 3);
52 LIBCPP_ASSERT(r->second == Emplaceable());
53 r = std::next(r, 2);
54 assert(r->first == 3);
55 LIBCPP_ASSERT(r->second == Emplaceable(5, 6));
56 }
57 {
58 typedef std::unordered_multimap<int,
59 Emplaceable,
60 std::hash<int>,
61 std::equal_to<int>,
62 min_allocator<std::pair<const int, Emplaceable>>>
63 C;
64 typedef C::iterator R;
65 C c;
66 C::const_iterator e = c.end();
67 R r = c.emplace_hint(e, std::piecewise_construct, std::forward_as_tuple(args: 3), std::forward_as_tuple());
68 assert(c.size() == 1);
69 assert(r->first == 3);
70 assert(r->second == Emplaceable());
71
72 r = c.emplace_hint(c.end(), std::pair<const int, Emplaceable>(3, Emplaceable(5, 6)));
73 assert(c.size() == 2);
74 assert(r->first == 3);
75 assert(r->second == Emplaceable(5, 6));
76 LIBCPP_ASSERT(r == std::next(c.begin()));
77
78 r = c.emplace_hint(r, std::piecewise_construct, std::forward_as_tuple(args: 3), std::forward_as_tuple(args: 6, args: 7));
79 assert(c.size() == 3);
80 assert(r->first == 3);
81 assert(r->second == Emplaceable(6, 7));
82 LIBCPP_ASSERT(r == std::next(c.begin()));
83 r = c.begin();
84 assert(r->first == 3);
85 LIBCPP_ASSERT(r->second == Emplaceable());
86 r = std::next(r, 2);
87 assert(r->first == 3);
88 LIBCPP_ASSERT(r->second == Emplaceable(5, 6));
89 }
90
91 return 0;
92}
93

source code of libcxx/test/std/containers/unord/unord.multimap/unord.multimap.modifiers/emplace_hint.pass.cpp