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The latest version of exceptional is 0.3.0.0-0.

exceptional

Version 0.2.0.0 revision 0 uploaded by pharpend.

Package meta

Synopsis
Essentially the Maybe type with error messages.
Description

This is a very simple 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.

Changes

0.2.0.0
Add exceptional function to encapsulate ordinary exceptions in the Exceptional monad. Add folding functions.
0.1.5.0
Add exceptIO function to encapsulate IO errors in the Exceptional monad.
0.1.4.3
Fix bug where exceptional won't compile on base < 4.8. Also move the changelog back to the description so it's more visible.
0.1.4.2
Moved change log to a separate file so Hackage displays it correctly.
0.1.4.1
Documentation enhancements/fixes.
0.1.4.0
Added fromMaybe and toMaybe functions, and a link to the bug tracker.
0.1.3.0
Fixed a typo. 0.1.2.0 won't build. Also added definition of empty for Alternative.
0.1.2.0
Added fromEither and toEither functions.
0.1.1.3
Hackage is terrible. Yet another formatting fix.
0.1.1.2
Yet another formatting fix.
0.1.1.1
Formatting fix to the haddock documentation.
0.1.1.0
Add runExceptional function.
0.1.0.1
Minor documentation changes. No changes to the API.
0.1.0.0
Initial version
Author
Peter Harpending
Bug reports
https://github.com/pharpend/exceptional/issues
Category
Control
Copyright
Copyright (c) 2015, Peter Harpending.
Homepage
https://github.com/pharpend/exceptional
Maintainer
peter@harpending.org
Package URL
n/a
Stability
n/a

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