[Haskell-beginners] Using symbolic values in the case expression

[Ozgur Akgun]

On 11 November 2010 17:03, C K Kashyap <ckkashyap at gmail.com> wrote:

> v1 = 1
> v2 = 2
>
> f x = case x of
>  v1 -> "One"
>  v2 -> "Two"
>

The closest I can thin is the following:

f x | x == v1 = "One"
    | x == v2 = "Two"

But, keep in mind, this is *not* the same thing. It requires Eq on x, and
you lose all the exhaustiveness/overlapping checks pattern matching
provides.

HTH,

-- 
Ozgur Akgun
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