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 // <queue>
11 
12 // void pop();
13 
14 #include <queue>
15 #include <cassert>
16 
17 int main()
18 {
19     std::queue<int> q;
20     assert(q.size() == 0);
21     q.push(1);
22     q.push(2);
23     q.push(3);
24     assert(q.size() == 3);
25     assert(q.front() == 1);
26     assert(q.back() == 3);
27     q.pop();
28     assert(q.size() == 2);
29     assert(q.front() == 2);
30     assert(q.back() == 3);
31     q.pop();
32     assert(q.size() == 1);
33     assert(q.front() == 3);
34     assert(q.back() == 3);
35     q.pop();
36     assert(q.size() == 0);
37 }
38