fail

Forward-compatible MonadFail class

https://prime.haskell.org/wiki/Libraries/Proposals/MonadFail

LTS Haskell 23.19:	4.9.0.0
Stackage Nightly 2025-04-24:	4.9.0.0
Latest on Hackage:	4.9.0.0

See all snapshots fail appears in

BSD-3-Clause licensed by Herbert Valerio Riedel

Maintained by [email protected]

This version can be pinned in stack with:fail-4.9.0.0@sha256:35d1ee29364447c1b7d616bb1ee31f162b73e85fea91d7ca6441cf901398f572,1051

Module documentation for 4.9.0.0

There are no documented modules for this package.

Used by 15 packages in lts-18.6(full list with versions):

aeson-combinators, avro, BNFC-meta, equivalence, ersatz, happy-meta, HCodecs, llvm-hs-pure, mongoDB, rcu, scalpel-core, scanner, scotty, th-desugar, zippers

This package contains the Control.Monad.Fail module providing the MonadFail class that became available in base-4.9.0.0 for older base package versions.

This package turns into an empty package when used with GHC versions which already provide the Control.Monad.Fail module to make way for GHC's own Control.Monad.Fail module.