1 // { dg-do compile }
2 // { dg-require-normal-namespace "" }
3 
4 // Copyright (C) 2007-2020 Free Software Foundation, Inc.
5 //
6 // This file is part of the GNU ISO C++ Library.  This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
10 // any later version.
11 
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 // GNU General Public License for more details.
16 
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING3.  If not see
19 // <http://www.gnu.org/licenses/>.
20 
21 #include <queue>
22 
23 namespace std {
24   template <class T, class Container> class queue;
25   template <class T, class Container>
26     bool operator==(const queue<T, Container>& x,
27                     const queue<T, Container>& y);
28 
29   template <class T, class Container>
30     bool operator< (const queue<T, Container>& x,
31                     const queue<T, Container>& y);
32 
33   template <class T, class Container>
34     bool operator!=(const queue<T, Container>& x,
35                     const queue<T, Container>& y);
36 
37   template <class T, class Container>
38     bool operator> (const queue<T, Container>& x,
39                     const queue<T, Container>& y);
40 
41   template <class T, class Container>
42     bool operator>=(const queue<T, Container>& x,
43                     const queue<T, Container>& y);
44 
45   template <class T, class Container>
46     bool operator<=(const queue<T, Container>& x,
47                     const queue<T, Container>& y);
48 
49   template <class T, class Container, class Compare>
50   class priority_queue;
51 }
52