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 // <queue>
13 
14 // template <class... Args> reference emplace(Args&&... args);
15 
16 #include <queue>
17 #include <cassert>
18 
19 #include "../../../Emplaceable.h"
20 
21 int main()
22 {
23     typedef Emplaceable T;
24     std::queue<Emplaceable> q;
25     T& r1 = q.emplace(1, 2.5);
26     assert(&r1 == &q.back());
27     T& r2 = q.emplace(2, 3.5);
28     assert(&r2 == &q.back());
29     T& r3 = q.emplace(3, 4.5);
30     assert(&r3 == &q.back());
31     assert(q.size() == 3);
32     assert(q.front() == Emplaceable(1, 2.5));
33     assert(q.back() == Emplaceable(3, 4.5));
34     assert(&r3 == &q.back());
35     assert(&r1 == &q.front());
36 }
37