/*
    This file is part of exprparser, a lex/yacc based expression parser
    Copyright (C) 2002-6 Toby Thain, toby@telegraphics.com.au

    This program 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 of the License, or
    (at your option) any later version.

    This program 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 this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "symtab.h"

struct node{
	struct node *next; // to thread the linked-list of allocations
	int kind;
	struct node *child[3];
	union{
		double value;
		struct sym_rec *sym;
	} v;
};

#undef YYSTYPE
#define YYSTYPE struct node *

extern struct node *node_list;

struct node *newnode(int kind);
void dumptree(struct node *root,int level);
double eval(struct node *root);
void freetree(struct node*);
void freeallnodes();
void checkvars(struct node *t,int varused[]);