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 // reference front(); 13 14 #include <queue> 15 #include <cassert> 16 main()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 int& ir = q.front(); 25 assert(ir == 1); 26 } 27