Tomasz Zielonka <[EMAIL PROTECTED]> writes:
> I have an idea for a funny extension to pattern matching in Haskell. I
> wonder if it was proposed before, and most importantly, if it would be seen
> as useful.
Yes, it has been proposed before. See
Marcus Mohnen, "Context Patterns", Proceedings of IFL'96 (LNCS 1268)
Marcus Mohnen, "Context Patterns II", Proceedings of IFL'97 (LNCS 1467)
Regards,
Malcolm
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