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Re: Simple inheritance question

by ikegami (Pope)
on Apr 23, 2010 at 16:51 UTC ( #836563=note: print w/replies, xml ) Need Help??


in reply to Simple inheritance question

Perl has no idea it's suppose to call test as a method.

The only difference between a function and a method is how the sub is called, or rather, how it expects to be called.

test() # function Module::test() # function $obj->test() # virtual instance method $class->test() # static method

Non-virtual instance methods can be approximated using

test($obj) # From within the object that defines test(). -or- Class::test($obj) # From anywhere.

I say "approximate", since it's doesn't check inheritance.

And there's also this syntax:

$obj->Class::test() $class->Class::test() $obj->SUPER::test() $class->SUPER::test()

In this case, all of the following work:

sub eg { $_[0]->test($_[1]); } sub eg { One::test(@_); } sub eg { Two->test($_[1]); } sub eg { One->test($_[1]); }

Only the first really makes sense, though. And maybe the second one if you don't want test to be overridden by a child class of Two.

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