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- /*
-
- eval.h
-
- This software is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This software 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this software; if not, write to the Free
- Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- Original copyright notice follows:
-
- Copyright, 1993, Brent Benson. All Rights Reserved.
- 0.4 & 0.5 Revisions Copyright 1994, Joseph N. Wilson. All Rights Reserved.
-
- Permission to use, copy, and modify this software and its
- documentation is hereby granted only under the following terms and
- conditions. Both the above copyright notice and this permission
- notice must appear in all copies of the software, derivative works
- or modified version, and both notices must appear in supporting
- documentation. Users of this software agree to the terms and
- conditions set forth in this notice.
-
- */
-
- #ifndef EVAL_H
- #define EVAL_H
-
- #include "object.h"
- #include "env.h"
-
- Object eval (Object obj);
- Object print_stack (void);
-
- struct eval_stack {
- struct eval_stack *next;
- Object context;
- struct frame *frame;
- };
-
- extern struct eval_stack *eval_stack;
-
- void pop_eval_stack (void);
- void push_eval_stack (Object obj);
-
- /* <pcb> to support tail recursion. */
- Object tail_eval (Object obj);
-
- #endif
-