%{
#include <stdio.h>
%}

%token NAME NUMBER
%%
statement:	NAME '=' expression	{ printf("pretending to assign %s the value %d\n", $1, $3); }
	/* Note that in the current version, the lexer never actually
returns NAME, so this rule will never happen. */
	;
	|	expression		{ printf("= %d\n", $1); }
	;
expression:	expression '+' NUMBER	{ $$ = $1 + $3;
					printf ("Recognized '+' expression.\n");
					}
	|	expression '-' NUMBER	{ $$ = $1 - $3; 
					printf ("Recognized '-' expression.\n");
					}
	|	NUMBER			{ $$ = $1; 
					printf ("Recognized a number.\n");
					}
	;
%%
int main (void) {
	return yyparse();
	}

/* Added because panther doesn't have liby.a installed. */
int yyerror (char *msg) {
	return fprintf (stderr, "YACC: %s\n", msg);
	}