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
17int 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