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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