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octave-2.1.23
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pt-cmd.h
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2000-01-15
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/*
Copyright (C) 1996, 1997 John W. Eaton
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 2, 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, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#if !defined (octave_tree_cmd_h)
#define octave_tree_cmd_h 1
#if defined (__GNUG__)
#pragma interface
#endif
#include <string>
class tree_walker;
#include "pt.h"
// A base class for commands.
class
tree_command : public tree
{
public:
tree_command (int l = -1, int c = -1)
: tree (l, c) { }
virtual ~tree_command (void) { }
virtual void eval (void) = 0;
private:
// No copying!
tree_command (const tree_command&);
tree_command& operator = (const tree_command&);
};
// No-op.
class
tree_no_op_command : public tree_command
{
public:
tree_no_op_command (const string& cmd = "no_op", int l = -1, int c = -1)
: tree_command (l, c), orig_cmd (cmd) { }
~tree_no_op_command (void) { }
void eval (void) { }
void accept (tree_walker& tw);
string original_command (void) { return orig_cmd; }
private:
string orig_cmd;
// No copying!
tree_no_op_command (const tree_no_op_command&);
tree_no_op_command& operator = (const tree_no_op_command&);
};
#endif
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/