TYPE_OP_PLUS
if ((exp->next->type == TYPE_OP_PLUS) ||
case TYPE_OP_PLUS:
} else if ((at->type == TYPE_OP_PLUS) ||
at->type = TYPE_OP_PLUS;
case TYPE_OP_PLUS:
if ((op->type != TYPE_OP_PLUS) &&
case TYPE_OP_PLUS: