fail is:module

Transitional module providing the MonadFail class and primitive instances. This module can be imported for defining forward compatible MonadFail instances:

import qualified Control.Monad.Fail as Fail

instance Monad Foo where
(>>=) = {- ...bind impl... -}

-- Provide legacy fail implementation for when
-- new-style MonadFail desugaring is not enabled.
fail = Fail.fail

instance Fail.MonadFail Foo where
fail = {- ...fail implementation... -}

See https://gitlab.haskell.org/haskell/prime/-/wikis/libraries/proposals/monad-fail for more details.

Transitional module providing the MonadFail class and primitive instances. This module can be imported for defining forward compatible MonadFail instances:

import qualified Control.Monad.Fail as Fail

instance Monad Foo where
(>>=) = {- ...bind impl... -}

-- Provide legacy fail implementation for when
-- new-style MonadFail desugaring is not enabled.
fail = Fail.fail

instance Fail.MonadFail Foo where
fail = {- ...fail implementation... -}

See https://prime.haskell.org/wiki/Libraries/Proposals/MonadFail for more details.

Provider of the MonadFail instance for Eff.

An effect providing failure with an error message. This effect is invoked through the fail method from MonadFail. Predefined carriers:

• Control.Carrier.Fail.Either

A pure MonadFail.

Monad transformer providing MonadFail.

Types for specifying how text encoding/decoding fails

Types for specifying how text encoding/decoding fails

The failure report formatter is like the print formatter, but it only shows failures. Documentation can be found here.

Failover the instance to its failover replica instance. See: Cloud SQL Admin API Reference for sql.instances.failover.

Compatibility layer for Control.Monad.Fail