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 // <stack>
11
12 // reference top();
13
14 #include <stack>
15 #include <cassert>
16
main()17 int main()
18 {
19 std::stack<int> q;
20 assert(q.size() == 0);
21 q.push(1);
22 q.push(2);
23 q.push(3);
24 int& ir = q.top();
25 assert(ir == 3);
26 }
27