queue

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// <queue> -*- C++ -*-
 
// Copyright (C) 2001-2026 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
 
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
 
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.
 
/*
 *
 * Copyright (c) 1994
 * Hewlett-Packard Company
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Hewlett-Packard Company makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 *
 * Copyright (c) 1996,1997
 * Silicon Graphics Computer Systems, Inc.
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Silicon Graphics makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 */
 
/** @file include/queue
 *  This is a Standard C++ Library header.
 */
 
#ifndef _GLIBCXX_QUEUE
#define _GLIBCXX_QUEUE 1
 
#ifdef _GLIBCXX_SYSHDR
#pragma GCC system_header
#endif
 
#include <bits/requires_hosted.h> // containers
 
#define __glibcxx_want_adaptor_iterator_pair_constructor
#define __glibcxx_want_containers_ranges
#define __glibcxx_want_constexpr_queue
#include <bits/version.h>
 
#include <deque>
#include <vector>
#include <bits/stl_heap.h>
#include <bits/stl_function.h>
#include <bits/stl_queue.h>
 
#ifdef __glibcxx_format_ranges // C++ >= 23 && HOSTED
#include <bits/formatfwd.h>
 
#ifdef __glibcxx_constexpr_format // C++ >= 26 && HOSTED && CXX11 strings
# define _GLIBCXX_CONSTEXPR_FORMAT constexpr
#else
# define _GLIBCXX_CONSTEXPR_FORMAT
#endif
 
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
  // Standard does not constrain accepted _CharT, we do so we can
  // befriend specializations.
  template<__format::__char _CharT, typename _Tp,
           formattable<_CharT> _Container>
    struct formatter<queue<_Tp, _Container>, _CharT>
    {
    private:
      using __maybe_const_adaptor
        = __conditional_t<
            __format::__const_formattable_range<_Container, _CharT>,
            const queue<_Tp, _Container>, queue<_Tp, _Container>>;
 
    public:
      // Standard declares this as template accepting unconstrained
      // ParseContext type.
      constexpr typename basic_format_parse_context<_CharT>::iterator
      parse(basic_format_parse_context<_CharT>& __pc)
      { return _M_f.parse(__pc); }
 
      // Standard declares this as template accepting unconstrained
      // FormatContext type.
      template<typename _Out>
        _GLIBCXX_CONSTEXPR_FORMAT
        typename basic_format_context<_Out, _CharT>::iterator
        format(__maybe_const_adaptor& __a,
               basic_format_context<_Out, _CharT>& __fc) const
        { return _M_f.format(__a.c, __fc); }
 
    private:
      // Standard uses formatter<ref_view<_Container>, _CharT>, but range_formatter
      // provides same behavior.
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 3881. Incorrect formatting of container adapters backed by std::string
      range_formatter<_Tp, _CharT> _M_f;
    };
 
#if __glibcxx_print >= 202406L
  // _GLIBCXX_RESOLVE_LIB_DEFECTS
  // 4398. enable_nonlocking_formatter_optimization should be disabled for container adaptors
  template<typename _Tp, typename _Container>
    constexpr bool
    enable_nonlocking_formatter_optimization<queue<_Tp, _Container>> = false;
#endif
 
  template<__format::__char _CharT, typename _Tp,
           formattable<_CharT> _Container, typename _Compare>
    struct formatter<priority_queue<_Tp, _Container, _Compare>, _CharT>
    {
    private:
      using __maybe_const_adaptor
        = __conditional_t<
            __format::__const_formattable_range<_Container, _CharT>,
            const priority_queue<_Tp, _Container, _Compare>,
            priority_queue<_Tp, _Container, _Compare>>;
 
    public:
      // Standard declares this as template accepting unconstrained
      // ParseContext type.
      constexpr typename basic_format_parse_context<_CharT>::iterator
      parse(basic_format_parse_context<_CharT>& __pc)
      { return _M_f.parse(__pc); }
 
      // Standard declares this as template accepting unconstrained
      // FormatContext type.
      template<typename _Out>
        _GLIBCXX_CONSTEXPR_FORMAT
        typename basic_format_context<_Out, _CharT>::iterator
        format(__maybe_const_adaptor& __a,
               basic_format_context<_Out, _CharT>& __fc) const
        { return _M_f.format(__a.c, __fc); }
 
    private:
      // Standard uses formatter<ref_view<_Container>, _CharT>, but range_formatter
      // provides same behavior.
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 3881. Incorrect formatting of container adapters backed by std::string
      range_formatter<_Tp, _CharT> _M_f;
    };
 
#if __glibcxx_print >= 202406L
  // _GLIBCXX_RESOLVE_LIB_DEFECTS
  // 4398. enable_nonlocking_formatter_optimization should be disabled for container adaptors
  template<typename _Tp, typename _Container, typename _Comparator>
    constexpr bool
    enable_nonlocking_formatter_optimization<
      priority_queue<_Tp, _Container, _Comparator>> = false;
#endif
 
#undef _GLIBCXX_CONSTEXPR_FORMAT
 
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // __glibcxx_format_ranges
 
 
#endif /* _GLIBCXX_QUEUE */