Recipe 3.10: Changing an Attribute to a Method, or Vice Versa

Last Updated: Sep 8, 2003 Status: Draft

Problem:  

You are inheriting from a class that has a .foo attribute: you want your subclass to implement .foo as an algorithm, not a simple value.

Solution:  

Just do it:

class MyClass {
    has int $.foo = 0;
}

class DerivedClass {
    method int foo { ... }
}

Discussion:

(Need info from Apoc6)

Issue: There may a subtle problem with the whole attribute/method symmetry thing when you are attempting to store an anonymous method in an attribute. Not that you couldn't do it, but would the behavior be transparent?... I have to think about it a bit more.

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