At this point, I have 2 questions:
1. Where is can documented ?
2. How is it that I can use isa even though no features have been enabled ?

From UNIVERSAL:

UNIVERSAL is the base class from which all blessed references inherit....
UNIVERSAL provides the following methods:
$obj->isa( TYPE )
...
$obj->can( METHOD )

Regarding use feature 'isa', it appears this refers to the experimental isa operator, as opposed to the UNIVERSAL method.

Hope that helps,

Athanasius <°(((>< contra mundum סתם עוד האקר של פרל,

In reply to Re^4: A little overloading conundrum by Athanasius
in thread A little overloading conundrum by syphilis

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