+
−/*
+
−
+
−Copyright (C) 1996-2015 John W. Eaton
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−
+
−This file is part of Octave.
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−
+
−Octave is free software; you can redistribute it and/or modify it
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−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
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−ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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−FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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−for more details.
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−
+
−You should have received a copy of the GNU General Public License
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−along with Octave; see the file COPYING.  If not, see
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−<http://www.gnu.org/licenses/>.
+
−
+
−*/
+
−
+
−#if ! defined (octave_pt_h)
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−#define octave_pt_h 1
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−
+
−#include <string>
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−
+
−#include <iosfwd>
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−
+
−class octave_function;
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−class tree_walker;
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−
+
−// Base class for the parse tree.
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−
+
−class
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−tree
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−{
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−public:
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−
+
−  tree (int l = -1, int c = -1)
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−    : line_num (l), column_num (c), bp (false) { }
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−
+
−  virtual ~tree (void) { }
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−
+
−  virtual int line (void) const { return line_num; }
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−
+
−  virtual int column (void) const { return column_num; }
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−
+
−  void line (int l) { line_num = l; }
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−
+
−  void column (int c) { column_num = c; }
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−
+
−  void set_location (int l, int c)
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−  {
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−    line_num = l;
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−    column_num = c;
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−  }
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−
+
−  virtual void set_breakpoint (void) { bp = true; }
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−
+
−  virtual void delete_breakpoint (void) { bp = false; }
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−
+
−  bool is_breakpoint (void) const { return bp; }
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−
+
−  std::string str_print_code (void);
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−
+
−  virtual void accept (tree_walker& tw) = 0;
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−
+
−private:
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−
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−  // The input line and column where we found the text that was
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−  // eventually converted to this tree node.
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−  int line_num;
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−  int column_num;
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−
+
−  // Breakpoint flag.
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−  bool bp;
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−
+
−  // No copying!
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−
+
−  tree (const tree&);
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−
+
−  tree& operator = (const tree&);
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−};
+
−
+
−#endif