[Haskell-beginners] "Trinary" version of Either

[Ozgur Akgun]

Hi,

On 9 June 2011 16:15, Christopher Howard <christopher.howard at frigidcode.com>
 wrote:

> a "trinary" version of Either, i.e., allowing three values instead of two
>

I'd probably nest Eithers: Either a (Either b c)

You can also do some nicer trickery using the TypeOperators extension:

{-# LANGUAGE TypeOperators #-}

type Or = Either
infixr 5 `Or`

k :: a `Or` b `Or` c -- Same as "Either a (Either b c)"
k = undefined


HTH,
Ozgur
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