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 // <unordered_set>
11 
12 // template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>,
13 //           class Alloc = allocator<Value>>
14 // class unordered_set
15 
16 // template <class... Args>
17 //     pair<iterator, bool> emplace(Args&&... args);
18 
19 #include <unordered_set>
20 #include <cassert>
21 
22 #include "../../Emplaceable.h"
23 #include "../../min_allocator.h"
24 
25 int main()
26 {
27 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
28     {
29         typedef std::unordered_set<Emplaceable> C;
30         typedef std::pair<C::iterator, bool> R;
31         C c;
32         R r = c.emplace();
33         assert(c.size() == 1);
34         assert(*r.first == Emplaceable());
35         assert(r.second);
36 
37         r = c.emplace(Emplaceable(5, 6));
38         assert(c.size() == 2);
39         assert(*r.first == Emplaceable(5, 6));
40         assert(r.second);
41 
42         r = c.emplace(5, 6);
43         assert(c.size() == 2);
44         assert(*r.first == Emplaceable(5, 6));
45         assert(!r.second);
46     }
47 #if __cplusplus >= 201103L
48     {
49         typedef std::unordered_set<Emplaceable, std::hash<Emplaceable>,
50                       std::equal_to<Emplaceable>, min_allocator<Emplaceable>> C;
51         typedef std::pair<C::iterator, bool> R;
52         C c;
53         R r = c.emplace();
54         assert(c.size() == 1);
55         assert(*r.first == Emplaceable());
56         assert(r.second);
57 
58         r = c.emplace(Emplaceable(5, 6));
59         assert(c.size() == 2);
60         assert(*r.first == Emplaceable(5, 6));
61         assert(r.second);
62 
63         r = c.emplace(5, 6);
64         assert(c.size() == 2);
65         assert(*r.first == Emplaceable(5, 6));
66         assert(!r.second);
67     }
68 #endif
69 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
70 }
71