gcc/libstdc++-v3/include/std/stack

// <stack> -*- 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/stack
 *  This is a Standard C++ Library header.
 */

#ifndef _GLIBCXX_STACK
#define _GLIBCXX_STACK 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
#include <bits/version.h>

#include <deque>
#include <bits/stl_stack.h>

#ifdef __glibcxx_format_ranges // C++ >= 23 && HOSTED
#include <bits/formatfwd.h>

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<stack<_Tp, _Container>, _CharT>
    {
    private:
      using __maybe_const_adaptor
	= __conditional_t<
	    __format::__const_formattable_range<_Container, _CharT>,
	    const stack<_Tp, _Container>, stack<_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>
	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>.
      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<stack<_Tp, _Container>> = false;
#endif
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // __glibcxx_format_ranges


#endif /* _GLIBCXX_STACK */