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Postings from March 2005
Darren Duncan <darren@darrenduncan.net> wrote:
> A question: Would "has PkgNameArray @.tmpl_set_nms;" do what I
> expect, where the array as a whole is the sub-type, or would it make
> an array where each element is the sub-type?
I think this declares an array of PkgNameArrays, but "has
@.tmpl_set_nms is PkgNameArray;" will do what you want.
> New question: Is there a way to say that two classes have a
> privileged relationship, sort of like a marriage, such that each can
> see and/or change otherwise private attributes in objects of the
> other class, and yet the attribute list of each class is completely
> different from the other? Neither of the two objects is a subclass
> of the other, nor fulfills a role defined by the other.
S12:
Attributes are never visible outside a class definition, so a multi
method can only directly access the attributes of a class it's defined
within. However, it may call the private attribute accessors from a
different class if that other class has indicated that it trusts the
class the multi method is defined in:
class MyClass {
trusts Yourclass;
...
}
(end quote)
So for the relationship to work both ways, each class would have to
mark the other as trusted.
--
Brent 'Dax' Royal-Gordon <brent@brentdax.com>
Perl and Parrot hacker
"I used to have a life, but I liked mail-reading so much better."
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