exceptional: Essentially the Maybe type with error messages.
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
- 0.1.4.0
- Added
fromMaybe
andtoMaybe
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
forAlternative
. - 0.1.2.0
- Added
fromEither
andtoEither
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
[Skip to Readme]
Downloads
- exceptional-0.1.4.0.tar.gz [browse] (Cabal source package)
- Package description (as included in the package)
Maintainer's Corner
For package maintainers and hackage trustees
Candidates
- No Candidates
Versions [RSS] | 0.1.0.0, 0.1.0.1, 0.1.1.0, 0.1.1.1, 0.1.1.2, 0.1.1.3, 0.1.2.0, 0.1.3.0, 0.1.4.0, 0.1.4.1, 0.1.4.2, 0.1.4.3, 0.1.5.1, 0.2.0.0, 0.3.0.0 (info) |
---|---|
Dependencies | base (>=4 && <5) [details] |
License | BSD-2-Clause |
Copyright | Copyright (c) 2015, Peter Harpending. |
Author | Peter Harpending |
Maintainer | peter@harpending.org |
Category | Control |
Home page | https://github.com/pharpend/exceptional |
Bug tracker | https://github.com/pharpend/exceptional/issues |
Source repo | head: git clone https://github.com/pharpend/exceptional.git -b master this: git clone https://github.com/pharpend/exceptional.git -b master(tag 0.1.4.0) |
Uploaded | by pharpend at 2015-05-15T22:25:40Z |
Distributions | |
Reverse Dependencies | 1 direct, 0 indirect [details] |
Downloads | 10970 total (16 in the last 30 days) |
Rating | (no votes yet) [estimated by Bayesian average] |
Your Rating | |
Status | Docs uploaded by user Build status unknown [no reports yet] |