A consideration is to preserve can() as a test for the applicability of a method.

For example to avoid unnecessary or invalid processing around the method call: 

if ($myobj->can('do_something')) {

    my $input = do_something_before();

    my $result = $myobj->do_something($input);

    do_something_after($result);

}

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In reply to Re: OO design: abstract class or can()? by snoopy
in thread OO design: abstract class or can()? by perrin

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