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

KEYWORD struct|end|method|var|if|then|else|while|do|return|not|or|this
SPECIAL_CHAR \;|\(|\)|\:=|\.|\-|\*|\<|\=|\,
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 ist unsere zustandsvariable! */
%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 */

{KEYWORD} printf("%s\n", yytext);

{SPECIAL_CHAR} printf("%s\n", yytext);

{IDENTIFIER} printf("ident %s\n", yytext);

{NUMBER_DEC} printf("num %lx\n", strtol(yytext, (char **)NULL, 10));

{NUMBER_HEX} printf("num %lx\n", strtol(yytext, (char **)NULL, 16));

{WHITESPACE} /* ignorieren */

. {
	fprintf(stderr, "Lexikalischer Fehler auf Zeile %i\n", yylineno);
	exit(1);
}

%%

int main(int argc, char **argv) {
	yylex();
	return 0;
}