%option nounput noinput 

%{
#include <stdlib.h>

#ifdef FLEXALONE /* Mode flex seul */
  enum Return_Token_Values { UNION=1000, INTER, COMP, DIFF, ELEM, VAR};
#else            /* couplage flex/bison */
  #include "set.h"  //Requis avant yyparse.h a cause "union"...
  #include "yyparse.h"  
#endif

%}

ELEM [0-9]+
  // element = entier , range non checké en lexical

VAR S_[0-9]{1,2}
  // nom de variable de S_0 a S_99

SPACE [ \t]*
COMM "#"[^\n]*

%%
union		return UNION;
inter		return INTER;
comp		return COMP;
diff		return DIFF;
[=(){},]	return yytext[0];
\n		return yytext[0];
{ELEM}		{ yylval.elem=atoi(yytext); return(ELEM);}
{VAR}		{ yylval.index=atoi(yytext+2); return(VAR);}
{COMM}		;
{SPACE}		;
. 		printf("Invalid Char : %c",yytext[0]);
%%

int yywrap (void) {return 1;}
#ifdef FLEXALONE 
  int main(int argc, char *argv[]) { while (yylex()!=0) ; return 0; } 
#endif