pt-delimiter-list.h

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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2024-2025 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave 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 of the License, or
// (at your option) any later version.
//
// Octave 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.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
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////////////////////////////////////////////////////////////////////////
 
#if ! defined (octave_tree_delimiter_list_h)
#define octave_tree_delimiter_list_h 1
 
#include "octave-config.h"
 
#include <stack>
 
#include "filepos.h"
#include "token.h"
 
OCTAVE_BEGIN_NAMESPACE(octave)
 
class tree_delimiter_list
{
public:
 
  typedef std::pair<token, token> element_type;
 
  OCTAVE_DEFAULT_CONSTRUCT_COPY_MOVE_DELETE (tree_delimiter_list)
 
  size_t count () const { return m_delimiters.size (); }
 
  bool empty () const { return m_delimiters.empty (); }
 
  void push (const token& open_delim, const token& close_delim)
  {
    m_delimiters.push (element_type (open_delim, close_delim));
  }
 
  filepos beg_pos () const
  {
    if (m_delimiters.empty ())
      return filepos ();
 
    const element_type& elt = m_delimiters.top ();
    return elt.first.beg_pos ();
  }
 
  filepos end_pos () const
  {
    if (m_delimiters.empty ())
      return filepos ();
 
    const element_type& elt = m_delimiters.top ();
    return elt.second.end_pos ();
  }
 
private:
 
  std::stack<element_type> m_delimiters;
};
 
OCTAVE_END_NAMESPACE(octave)
 
#endif