williamr@2: //  (C) Copyright Jeremy Siek 2004 
williamr@2: //  Distributed under the Boost Software License, Version 1.0. (See
williamr@2: //  accompanying file LICENSE_1_0.txt or copy at
williamr@2: //  http://www.boost.org/LICENSE_1_0.txt)
williamr@2: 
williamr@2: #ifndef BOOST_QUEUE_HPP
williamr@2: #define BOOST_QUEUE_HPP
williamr@2: 
williamr@2: #include <deque>
williamr@2: #include <algorithm>
williamr@2: 
williamr@2: namespace boost {
williamr@2: 
williamr@2: template <class _Tp, 
williamr@2:           class _Sequence = std::deque<_Tp> >
williamr@2: class queue;
williamr@2: 
williamr@2: template <class _Tp, class _Seq>
williamr@2: inline bool operator==(const queue<_Tp, _Seq>&, const queue<_Tp, _Seq>&);
williamr@2: 
williamr@2: template <class _Tp, class _Seq>
williamr@2: inline bool operator<(const queue<_Tp, _Seq>&, const queue<_Tp, _Seq>&);
williamr@2: 
williamr@2: 
williamr@2: template <class _Tp, class _Sequence>
williamr@2: class queue {
williamr@2: 
williamr@2: #ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
williamr@2:   template <class _Tp1, class _Seq1>
williamr@2:   friend bool operator== (const queue<_Tp1, _Seq1>&,
williamr@2:                           const queue<_Tp1, _Seq1>&);
williamr@2:   template <class _Tp1, class _Seq1>
williamr@2:   friend bool operator< (const queue<_Tp1, _Seq1>&,
williamr@2:                          const queue<_Tp1, _Seq1>&);
williamr@2: #endif
williamr@2: public:
williamr@2:   typedef typename _Sequence::value_type      value_type;
williamr@2:   typedef typename _Sequence::size_type       size_type;
williamr@2:   typedef          _Sequence                  container_type;
williamr@2: 
williamr@2:   typedef typename _Sequence::reference       reference;
williamr@2:   typedef typename _Sequence::const_reference const_reference;
williamr@2: #ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
williamr@2: protected:
williamr@2: #endif
williamr@2:   _Sequence c;
williamr@2: public:
williamr@2:   queue() : c() {}
williamr@2:   explicit queue(const _Sequence& __c) : c(__c) {}
williamr@2: 
williamr@2:   bool empty() const { return c.empty(); }
williamr@2:   size_type size() const { return c.size(); }
williamr@2:   reference front() { return c.front(); }
williamr@2:   const_reference front() const { return c.front(); }
williamr@2:   reference top() { return c.front(); }
williamr@2:   const_reference top() const { return c.front(); }
williamr@2:   reference back() { return c.back(); }
williamr@2:   const_reference back() const { return c.back(); }
williamr@2:   void push(const value_type& __x) { c.push_back(__x); }
williamr@2:   void pop() { c.pop_front(); }
williamr@2: 
williamr@2:   void swap(queue& other)
williamr@2:   {
williamr@2:     using std::swap;
williamr@2:     swap(c, other.c);
williamr@2:   }
williamr@2: };
williamr@2: 
williamr@2: template <class _Tp, class _Sequence>
williamr@2: bool 
williamr@2: operator==(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
williamr@2: {
williamr@2:   return __x.c == __y.c;
williamr@2: }
williamr@2: 
williamr@2: template <class _Tp, class _Sequence>
williamr@2: bool
williamr@2: operator<(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
williamr@2: {
williamr@2:   return __x.c < __y.c;
williamr@2: }
williamr@2: 
williamr@2: template <class _Tp, class _Sequence>
williamr@2: bool
williamr@2: operator!=(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
williamr@2: {
williamr@2:   return !(__x == __y);
williamr@2: }
williamr@2: 
williamr@2: template <class _Tp, class _Sequence>
williamr@2: bool 
williamr@2: operator>(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
williamr@2: {
williamr@2:   return __y < __x;
williamr@2: }
williamr@2: 
williamr@2: template <class _Tp, class _Sequence>
williamr@2: bool 
williamr@2: operator<=(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
williamr@2: {
williamr@2:   return !(__y < __x);
williamr@2: }
williamr@2: 
williamr@2: template <class _Tp, class _Sequence>
williamr@2: bool 
williamr@2: operator>=(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
williamr@2: {
williamr@2:   return !(__x < __y);
williamr@2: }
williamr@2: 
williamr@2: template <class _Tp, class _Sequence>
williamr@2: inline void
williamr@2: swap(queue<_Tp, _Sequence>& __x, queue<_Tp, _Sequence>& __y)
williamr@2: { __x.swap(__y); }
williamr@2: 
williamr@2: } /* namespace boost */
williamr@2: 
williamr@2: #endif /* BOOST_QUEUE_HPP */