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// const_reference front() const;
12
13#include <queue>
14#include <cassert>
15
16#include "test_macros.h"
17
18int main(int, char**)
19{
20 std::queue<int> q;
21 assert(q.size() == 0);
22 q.push(1);
23 q.push(2);
24 q.push(3);
25 const std::queue<int>& cqr = q;
26 const int& cir = cqr.front();
27 assert(cir == 1);
28
29 return 0;
30}
31

source code of libcxx/test/std/containers/container.adaptors/queue/queue.defn/front_const.pass.cpp