emplace.pass.cpp revision 1ae14a374d5e15c60c6d3ae4adbcdf57c5e3a401 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// UNSUPPORTED: c++98, c++03
11
12// <unordered_map>
13
14// template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
15//           class Alloc = allocator<pair<const Key, T>>>
16// class unordered_map
17
18// template <class... Args>
19//     pair<iterator, bool> emplace(Args&&... args);
20
21#include <unordered_map>
22#include <cassert>
23
24#include "../../../Emplaceable.h"
25#include "min_allocator.h"
26
27int main()
28{
29    {
30        typedef std::unordered_map<int, Emplaceable> C;
31        typedef std::pair<C::iterator, bool> R;
32        C c;
33        R r = c.emplace(std::piecewise_construct, std::forward_as_tuple(3),
34                                                  std::forward_as_tuple());
35        assert(r.second);
36        assert(c.size() == 1);
37        assert(r.first->first == 3);
38        assert(r.first->second == Emplaceable());
39
40        r = c.emplace(std::pair<const int, Emplaceable>(4, Emplaceable(5, 6)));
41        assert(r.second);
42        assert(c.size() == 2);
43        assert(r.first->first == 4);
44        assert(r.first->second == Emplaceable(5, 6));
45
46        r = c.emplace(std::piecewise_construct, std::forward_as_tuple(5),
47                                               std::forward_as_tuple(6, 7));
48        assert(r.second);
49        assert(c.size() == 3);
50        assert(r.first->first == 5);
51        assert(r.first->second == Emplaceable(6, 7));
52    }
53    {
54        typedef std::unordered_map<int, Emplaceable, std::hash<int>, std::equal_to<int>,
55                            min_allocator<std::pair<const int, Emplaceable>>> C;
56        typedef std::pair<C::iterator, bool> R;
57        C c;
58        R r = c.emplace(std::piecewise_construct, std::forward_as_tuple(3),
59                                                  std::forward_as_tuple());
60        assert(r.second);
61        assert(c.size() == 1);
62        assert(r.first->first == 3);
63        assert(r.first->second == Emplaceable());
64
65        r = c.emplace(std::pair<const int, Emplaceable>(4, Emplaceable(5, 6)));
66        assert(r.second);
67        assert(c.size() == 2);
68        assert(r.first->first == 4);
69        assert(r.first->second == Emplaceable(5, 6));
70
71        r = c.emplace(std::piecewise_construct, std::forward_as_tuple(5),
72                                               std::forward_as_tuple(6, 7));
73        assert(r.second);
74        assert(c.size() == 3);
75        assert(r.first->first == 5);
76        assert(r.first->second == Emplaceable(6, 7));
77    }
78}
79