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// <map>
12
13// class map
14
15// template <class... Args>
16// pair<iterator, bool> emplace(Args&&... args);
17
18#include <map>
19#include <cassert>
20#include <tuple>
21
22#include "test_macros.h"
23#include "../../../Emplaceable.h"
24#include "DefaultOnly.h"
25#include "min_allocator.h"
26
27int main(int, char**) {
28 {
29 typedef std::map<int, DefaultOnly> M;
30 typedef std::pair<M::iterator, bool> R;
31 M m;
32 assert(DefaultOnly::count == 0);
33 R r = m.emplace();
34 assert(r.second);
35 assert(r.first == m.begin());
36 assert(m.size() == 1);
37 assert(m.begin()->first == 0);
38 assert(m.begin()->second == DefaultOnly());
39 assert(DefaultOnly::count == 1);
40 r = m.emplace(std::piecewise_construct, std::forward_as_tuple(args: 1), std::forward_as_tuple());
41 assert(r.second);
42 assert(r.first == std::next(m.begin()));
43 assert(m.size() == 2);
44 assert(std::next(m.begin())->first == 1);
45 assert(std::next(m.begin())->second == DefaultOnly());
46 assert(DefaultOnly::count == 2);
47 r = m.emplace(std::piecewise_construct, std::forward_as_tuple(args: 1), std::forward_as_tuple());
48 assert(!r.second);
49 assert(r.first == std::next(m.begin()));
50 assert(m.size() == 2);
51 assert(std::next(m.begin())->first == 1);
52 assert(std::next(m.begin())->second == DefaultOnly());
53 assert(DefaultOnly::count == 2);
54 }
55 assert(DefaultOnly::count == 0);
56 {
57 typedef std::map<int, Emplaceable> M;
58 typedef std::pair<M::iterator, bool> R;
59 M m;
60 R r = m.emplace(std::piecewise_construct, std::forward_as_tuple(args: 2), std::forward_as_tuple());
61 assert(r.second);
62 assert(r.first == m.begin());
63 assert(m.size() == 1);
64 assert(m.begin()->first == 2);
65 assert(m.begin()->second == Emplaceable());
66 r = m.emplace(std::piecewise_construct, std::forward_as_tuple(args: 1), std::forward_as_tuple(args: 2, args: 3.5));
67 assert(r.second);
68 assert(r.first == m.begin());
69 assert(m.size() == 2);
70 assert(m.begin()->first == 1);
71 assert(m.begin()->second == Emplaceable(2, 3.5));
72 r = m.emplace(std::piecewise_construct, std::forward_as_tuple(args: 1), std::forward_as_tuple(args: 2, args: 3.5));
73 assert(!r.second);
74 assert(r.first == m.begin());
75 assert(m.size() == 2);
76 assert(m.begin()->first == 1);
77 assert(m.begin()->second == Emplaceable(2, 3.5));
78 }
79 {
80 typedef std::map<int, double> M;
81 typedef std::pair<M::iterator, bool> R;
82 M m;
83 R r = m.emplace(args: M::value_type(2, 3.5));
84 assert(r.second);
85 assert(r.first == m.begin());
86 assert(m.size() == 1);
87 assert(m.begin()->first == 2);
88 assert(m.begin()->second == 3.5);
89 }
90 {
91 typedef std::map<int, DefaultOnly, std::less<int>, min_allocator<std::pair<const int, DefaultOnly>>> M;
92 typedef std::pair<M::iterator, bool> R;
93 M m;
94 assert(DefaultOnly::count == 0);
95 R r = m.emplace();
96 assert(r.second);
97 assert(r.first == m.begin());
98 assert(m.size() == 1);
99 assert(m.begin()->first == 0);
100 assert(m.begin()->second == DefaultOnly());
101 assert(DefaultOnly::count == 1);
102 r = m.emplace(std::piecewise_construct, std::forward_as_tuple(args: 1), std::forward_as_tuple());
103 assert(r.second);
104 assert(r.first == std::next(m.begin()));
105 assert(m.size() == 2);
106 assert(std::next(m.begin())->first == 1);
107 assert(std::next(m.begin())->second == DefaultOnly());
108 assert(DefaultOnly::count == 2);
109 r = m.emplace(std::piecewise_construct, std::forward_as_tuple(args: 1), std::forward_as_tuple());
110 assert(!r.second);
111 assert(r.first == std::next(m.begin()));
112 assert(m.size() == 2);
113 assert(std::next(m.begin())->first == 1);
114 assert(std::next(m.begin())->second == DefaultOnly());
115 assert(DefaultOnly::count == 2);
116 }
117 assert(DefaultOnly::count == 0);
118 {
119 typedef std::map<int, Emplaceable, std::less<int>, min_allocator<std::pair<const int, Emplaceable>>> M;
120 typedef std::pair<M::iterator, bool> R;
121 M m;
122 R r = m.emplace(std::piecewise_construct, std::forward_as_tuple(args: 2), std::forward_as_tuple());
123 assert(r.second);
124 assert(r.first == m.begin());
125 assert(m.size() == 1);
126 assert(m.begin()->first == 2);
127 assert(m.begin()->second == Emplaceable());
128 r = m.emplace(std::piecewise_construct, std::forward_as_tuple(args: 1), std::forward_as_tuple(args: 2, args: 3.5));
129 assert(r.second);
130 assert(r.first == m.begin());
131 assert(m.size() == 2);
132 assert(m.begin()->first == 1);
133 assert(m.begin()->second == Emplaceable(2, 3.5));
134 r = m.emplace(std::piecewise_construct, std::forward_as_tuple(args: 1), std::forward_as_tuple(args: 2, args: 3.5));
135 assert(!r.second);
136 assert(r.first == m.begin());
137 assert(m.size() == 2);
138 assert(m.begin()->first == 1);
139 assert(m.begin()->second == Emplaceable(2, 3.5));
140 }
141 {
142 typedef std::map<int, double, std::less<int>, min_allocator<std::pair<const int, double>>> M;
143 typedef std::pair<M::iterator, bool> R;
144 M m;
145 R r = m.emplace(M::value_type(2, 3.5));
146 assert(r.second);
147 assert(r.first == m.begin());
148 assert(m.size() == 1);
149 assert(m.begin()->first == 2);
150 assert(m.begin()->second == 3.5);
151 }
152
153 return 0;
154}
155

source code of libcxx/test/std/containers/associative/map/map.modifiers/emplace.pass.cpp