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/* This file is part of the Project Athena Zephyr Notification System.
* It is one of the source files comprising zwgc, the Zephyr WindowGram
* client.
*
* Created by: Marc Horowitz <marc@athena.mit.edu>
*
* $Id$
*
* Copyright (c) 1989 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#include <zephyr/mit-copyright.h>
#ifndef eval_MODULE
#define eval_MODULE
#include "new_string.h"
/*
* string eval_expr(Node *expr)
* Modifies: dict
* Requires: expr is a proper expression (NOT NULL). (see node.c)
* Effects: Evaluates expr to its string value which is returned.
* The returned string is on the heap and must be freed
* eventually.
*/
extern string eval_expr(Node *);
/*
* int eval_bool_expr(Node *expr)
* Modifies: dict
* Requires: expr is a proper expression or NULL. (see node.c)
* Effects: Evaluates expr to its boolean value which is returned.
* NULL is defined to have the boolean value true.
*/
extern int eval_bool_expr(Node *);
#endif
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