errors

Simplified error-handling

Version on this page:	2.3.0@rev:1
LTS Haskell 19.13:	2.3.0@rev:3
Stackage Nightly 2022-06-27:	2.3.0@rev:3
Latest on Hackage:	2.3.0@rev:3

See all snapshots errors appears in

BSD-3-Clause licensed by Gabriel Gonzalez

Maintained by Gabriel439@gmail.com

This version can be pinned in stack with:errors-2.3.0@sha256:377ffba00149eba85e269df3392eea461cde7cd8f7325e17dd2270cbed01c623,1429

Module documentation for 2.3.0

Control
- Control.Error
Data
- Data.EitherR

Depends on 6 packages(full list with versions):

base, exceptions, safe, text, transformers, transformers-compat

Used by 10 packages in nightly-2021-09-18(full list with versions):

clash-lib, errors-ext, faktory, freckle-app, gopher-proxy, hedis, HPDF, http-link-header, text-conversions, xlsx

The one-stop shop for all your error-handling needs! Just import Control.Error.

This library encourages an error-handling style that directly uses the type system, rather than out-of-band exceptions.

Changes

2.3.0

BREAKING CHANGE: syncIO now expects a MonadIO constraint instead of UnexceptionalIO
- syncIO also changes how it detects asynchronous exceptions. It now decides based on whether or not an exception inherits from SomeAsyncException
- See: https://github.com/Gabriel439/Haskell-Errors-Library/pull/53

2.2.5

Increase upper bound on exceptions

2.2.4

Increase upper bound on exceptions

2.2.3

Increase upper bound on transformers-compat

2.2.2

Support GHC 8.4 through compatibility with Semigroup/Monoid proposal

2.2.1

Add precedence and fixity for (?:)

2.2.0

BREAKING CHANGE: Use Text instead of String
Add handleExceptT

2.1.3

Support older versions of ghc

2.1.2

Increase upper bound on transformers dependency

2.1.1

Increase upper bound on transformers-compat

2.1.0

Change syncio to use unexceptionalio to prove that all synchronous exceptions were caught and handled

2.0.0

Switch from EitherT to ExceptT

1.4.7

Increase upper bound on transformers from 0.4 to 0.5

1.4.6

Add bool
Add (?:)
Add isJustT
Add isNothingT
Add isLeftT
Add isRightT

1.4.5

Increase upper bound on either from 4.1 to 5

1.4.4

Add failWith
Add failWithM

1.4.3

Add AllE
Add AnyE
Increase upper bound on either from 3.5 to 4.1

1.4.2

Add (??)
Add (!?)
Add syncIO

1.4.1

Re-export EitherT
Re-export MaybeT

1.4.0

Add maybeT
Add just
Add nothing
Add upper bound to either
Add upper bound to safe
Add upper bound to transformers

1.3.1

Increase lower bound on transformers from 0.2 to 0.3.0.0

1.3.0

Add assertMay
Add rightMay
Add justErr
Add tryJust
Add tryRight
Add MonadPlus functions to Control.Error.Safe
Add isLeft
Add isRight
Add fmapR
Add fmapRT
Add err
Add errLn
Add flipE
Add flipET
Rename tryIO to scriptIO
Remove tryMaybe
Remove tryEither
Rename liftMaybe to hoistMaybe
Rename liftEither to hoistEither

1.2.1

Add lower bound to either

1.2.0

Remove right
Remove left

1.1.1

Cosmetic changes

1.1.0

Add left

1.0.0

Initial release