FreeBSD/btree/parse.y

/* parser */
%{
#include <stdio.h>
extern int yylineno;
extern int do_quit;
static void yyerror(const char *);

static void yyerror(const char *errmsg)
{
    fprintf(stderr, "ruleset line %d: %s.", yylineno - 1, errmsg);
}

int yywrap(void)
{
    return (1);
}

int dbinsert(size_t key, char *data);
int dbdelete(size_t key);
int dbget(size_t key);

%}

%union 
{
        size_t number;
        char *string;
}

%token <number> KEY
%token <string> STRING

%token QUOTE INSERT DELETE GET QUIT

%%



ruleset:	/*empty*/
	|	ruleset	command
	;

command:	
	insert
	|
	delete
	|
	get
	|
	quit
	;

insert:
	INSERT	KEY STRING
	{
		dbinsert($2, $3);
	}
	;
	
delete:
	DELETE	KEY
	{
		dbdelete($2);
	}
	;
get:
	GET	KEY
	{
		dbget($2);
	}
	;
quit:
	QUIT
	{
		do_quit = 1;
		YYACCEPT;
	}
	;
%%