1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <queue>
10 
11 // priority_queue();
12 
13 // bool empty() const;
14 
15 #include <queue>
16 #include <cassert>
17 
18 int main()
19 {
20     std::priority_queue<int> q;
21     assert(q.empty());
22     q.push(1);
23     assert(!q.empty());
24     q.pop();
25     assert(q.empty());
26 }
27