%{
#define YYERROR_VERBOSE
void yyerror(char *);
%}
%verbose
%token ID ILLEGAL_CHAR BOGUS
/* Das Token BOGUS wird niemals benutzt. */
%%
def:              param_spec return_spec ','
                ;
param_spec:       type
                | name_list ':' type
                ;
return_spec:      type
                | name ':' type
                | ID BOGUS
                ;
type:             ID
                ;
name:             ID
                ;
name_list:        name
                | name ',' name_list
                ;
%%
void yyerror(char *msg) {
    printf("\n%s\n", msg);
}
int main() {
    return yyparse();
}