[Haskell-cafe] Partial pattern matching

[Andrew Wagner]

The question is, is there some very important reason you can't do this?
firstCoord (P x _) = x

2009/3/9 Peter Verswyvelen <bugfact at gmail.com>

> In Haskell, a data constructor can be used partially applied:
> data Pair a b = P a b
>
> f = P 1
>
> however, I cannot do "partial pattern matching", e.g
>
> firstCoord (P x) = x
>
> does not work.
>
> I guess a very important reason must exist why this is the case?
>
>
>
>
>
>
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