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[project @ 1997-05-16 07:05:15 by jwe]
author jwe
date Fri, 16 May 1997 07:05:49 +0000
parents
children fc751d2a99fd
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2987
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1 /*
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2
ae20b3f37f5e [project @ 1997-05-16 07:05:15 by jwe]
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3 Copyright (C) 1996, 1997 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
ae20b3f37f5e [project @ 1997-05-16 07:05:15 by jwe]
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
ae20b3f37f5e [project @ 1997-05-16 07:05:15 by jwe]
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18 along with Octave; see the file COPYING. If not, write to the Free
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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20
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21 */
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22
ae20b3f37f5e [project @ 1997-05-16 07:05:15 by jwe]
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23 #if !defined (octave_tree_h)
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24 #define octave_tree_h 1
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25
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26 #if defined (__GNUG__)
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27 #pragma interface
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28 #endif
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29
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30 class tree_walker;
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31
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32 // Base class for the parse tree.
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33
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34 class
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35 tree
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36 {
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37 public:
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38
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39 tree (int l = -1, int c = -1)
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40 {
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41 line_num = l;
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42 column_num = c;
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43 }
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44
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45 virtual ~tree (void) { }
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46
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47 virtual int line (void) const
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48 { return line_num; }
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49
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50 virtual int column (void) const
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51 { return column_num; }
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52
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53 virtual void accept (tree_walker& tw) = 0;
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54
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55 private:
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56
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57 // The input line and column where we found the text that was
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58 // eventually converted to this tree node.
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59 int line_num;
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60 int column_num;
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61
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62 // No copying!
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63
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64 tree (const tree&);
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65
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66 tree& operator = (const tree&);
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67 };
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68
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69 #endif
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70
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71 /*
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72 ;;; Local Variables: ***
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73 ;;; mode: C++ ***
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74 ;;; End: ***
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75 */