a_token_val
extern union a_token_val a_t_val;
primary(int token, union a_token_val *val, int op, int noeval)
union a_token_val val;
binop(int token, union a_token_val *val, int op, int noeval)
and(int token, union a_token_val *val, int op, int noeval)
or(int token, union a_token_val *val, int op, int noeval)
cond(int token, union a_token_val *val, int op, int noeval)
union a_token_val val = a_t_val;
union a_token_val a_t_val;