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Re^2: Safer monkey-patching

by tobyink (Abbot)
on Jan 19, 2012 at 09:18 UTC ( #948726=note: print w/ replies, xml ) Need Help??

in reply to Re: Safer monkey-patching
in thread Safer monkey-patching

Indeed, this problem is not really solvable. However, my solution does offer a partial way forward.

Let's imagine that My::AwesomeError and Your::GroovyError both superclass Example::Error, and both add an asplode method.

We can then do:

my $err = Example::Error->new('Heat death of universe detected!'); $err->My::AwesomeError::asplode(); $err->Your::GroovyError::asplode(); $err->asplode(); # Russian roulette

With true monkey patching, where My::AwesomeError and Your::GroovyError each defined the asplode method directly in the Example::Error namespace, we wouldn't get the option to do the above.

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Re^3: Safer monkey-patching
by moritz (Cardinal) on Jan 19, 2012 at 09:40 UTC
    We can then do:
    my $err = Example::Error->new('Heat death of universe detected!'); $err->My::AwesomeError::asplode(); $err->Your::GroovyError::asplode(); $err->asplode(); # Russian roulette

    Of course you can, but it's not really a benefit. As you wrote in the OP, monkey patching is often done to work around limitations in existing code that you don't want to patch. But writing $obj->Class::method() requires the author of that code to be aware of the issue, and when he is, he can simply write Class::method($obj) without requiring any monkey patching.

    I do find your idea cute, but it really doesn't solve the "hard" problem, and the small problems it does solve seem to be either artifically constructed, or non-issues.

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