parse.c

一个FREE编译器原码

/*
 * parse.c - Parse source file.
 */

#include <stdio.h>
#include "util.h"
#include "symbol.h"
#include "absyn.h"
#include "errormsg.h"
#include "parse.h"

extern int yyparse(void);
extern A_exp absyn_root;

/* parse source file fname; 
   return abstract syntax data structure */
A_exp parse(string fname) 
{EM_reset(fname);
 if (yyparse() == 0) /* parsing worked */
   return absyn_root;
 else return NULL;
}