ghc-fail

Forward-compatible MonadFail class

This package contains the "Control.Monad.Fail" module providing the <<a href="https://prime.haskell.org/wiki/Libraries/Proposals/MonadFail">https://prime.haskell.org/wiki/Libraries/Proposals/MonadFail</a> MonadFail> class that became available in <<a href="https://hackage.haskell.org/package/base-4.9.0.0">https://hackage.haskell.org/package/base-4.9.0.0</a> 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.