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Suppose I have a haskell expression like:
foo (Nothing, Just a) = bar a
foo (Just a, Nothing) = bar a
Is there any haskell syntax to collapse those cases, so I can match either pattern and specify bar a as the response for both? Or is that about as succinct as I can get it?
That’s as succinct as it gets in Haskell. In ML there is a syntax for what you want (by writing multiple patterns, which bind the same variables, next to each other separated by
|with the body after the last pattern), but in Haskell there is not.