Popularity
1.4
Growing
Activity
0.5
Growing
1
1
1

Monthly Downloads: 46
Programming language: Haskell
License: BSD 2-clause "Simplified" License
Tags: Control    

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README

exceptional

This is a Haskell library that exists to house a type:

data Exceptional x
  = Failure String
  | Success x

It's much like Maybe, except instead of Nothing, we have Failure String.

A comparison could also be made to Either String. I made this library because I was dissatisfied with the Monad instance for Either. In this type, fail = Failure. It's rather simple.

Installing

cabal install exceptional

Or, add exceptional to the build-depends field in your .cabal file.