#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include "parser.h"

KEYWORD struct|end|method|var|if|then|else|while|do|return|not|or|this
IDENTIFIER [a-zA-Z_][0-9a-zA-Z_]*
NUMBER_HEX 0x[0-9A-Fa-f]+
NUMBER_DEC [0-9]+
WHITESPACE [\t\n\r ]
COMMENT_START \/\*
COMMENT_END	\*\/

%x COMMENT
%option yylineno
%%

{COMMENT_START} BEGIN(COMMENT);

<COMMENT>{COMMENT_END} BEGIN(INITIAL);

<COMMENT><<EOF>> {
	fprintf(stderr, "Kommentar nicht geschlossen\n");
	exit(1);
}

<COMMENT>(.|\n) /* alles im kommentar wird ignoriert */

struct return(STRUCT);
end return(END);
method return(METHOD);
var return(VAR);
if return(IF);
then return(THEN);
else return(ELSE);
while return(WHILE);
do return(DO);
return return(RETURN);
not return(NOT);
or return(OR);
this return(THIS);

{IDENTIFIER} return(IDENT); @{ @IDENT.name@ = strdup(yytext); @}

{NUMBER_DEC} return(NUM); @{ @NUM.val@ = strtol(yytext, (char **)NULL, 10); @}
{NUMBER_HEX} return(NUM); @{ @NUM.val@ = strtol(yytext, (char **)NULL, 16); @}

\:= return(ASSIGN);
\; return(';');
\( return('(');
\) return(')');
\. return('.');
\- return('-');
\* return('*');
\< return('<');
\= return('=');
\, return(',');

{WHITESPACE} /* ignore */

. {
		fprintf(stderr, "Lexical error on line %i\n", yylineno);
		exit(1);
}

%%