I have this code in flex program ".l"
"if" {return IF;}
"else" {return ELSE;}
"For" {return FOR;}
. {printf("SYNTAX ERROR .. EXIT ..");exit(0);}
and this code in bison program ".y"
%token IF ELSE FOR
but i got that error of
warning, rule cannot be matched
warning, rule cannot be matched
warning, rule cannot be matched
i found the problem
i needed to write the code on a single line like this
"if" { return IF; }
and not like this
"if" {
return IF;
}