[Python-Dev] PEP 246, redux (original) (raw)

Michael Chermside mcherm at mcherm.com
Tue Jan 11 18:27:26 CET 2005

Phillip:

I think you must inhabit a far more perfect world than I do.

You say, for instance, that:

...-1 if this introduces a performance penalty [...] just to support people who want to create deliberate Liskov violations. I personally don't think that we should pander to Liskov violators

... but in my world, people violate Liskov all the time, even in languages that attempt (unsuccessfully) to enforce it. [1]

You say that:

I think one should adapt primarily to interfaces, and interface-to-interface adaptation should be reserved for non-lossy, non-noisy adapters.

... but in my world, half the time I'm using adaptation to correct for the fact that someone else's poorly-written code requests some class where it should have just used an interface.

You seem to inhabit a world in which transitivity of adaptation can be enforced. But in my world, people occasionally misuse adaptation because they think they know what they're doing or because they're in a big hurry and it's the most convenient tool at hand.

I wish I lived in your world, but I don't.

-- Michael Chermside

[1] - Except for Eiffel. Eiffel seems to do a pretty good job of enforcing it.

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