Di.Df1.Monad

This module exports an API compatible with Di.Monad.

Documentation

type Df1T = DiT Level Path Message

Convenience type-synonym for a DiT restricted to all the df1 monomorphic types.

Df1T == DiT Level Path Message
   :: (* -> *) -> * -> *

Df1T m == DiT Level Path Message m
   :: * -> *

Df1T m a == DiT Level Path Message m a
   :: *

This type-synonym is not used within the di-df1 library itself because all functions exposed in the library have more general types. However, users are encouraged to use MonadDf1 if they find it useful to reduce boilerplate and improve type inferrence.

type MonadDf1 = MonadDi Level Path Message

Convenience type-synonym for a MonadDi restricted to all the df1 monomorphic types.

MonadDf1 == MonadDi Level Path Message
   :: (* -> *) -> Constraint

MonadDf1 m == MonadDi Level Path Message m
   :: Constraint

This type-synonym is not used within the di-df1 library itself because all functions exposed in the library have more general types. However, users are encouraged to use MonadDf1 if they find it useful to reduce boilerplate and improve type inferrence.

Hierarchy

push

Arguments

:: MonadDi level Path msg m

=> Segment

-> m a

-> m a

Push a new Segment to the MonadDi.

Metadata

attr

Arguments

:: MonadDi level Path msg m

=> Key

-> Value

-> m a

-> m a

Push a new attribute Key and Value to the MonadDi.

Messages

debug :: MonadDi Level path Message m => Message -> m ()

Log a message intended to be useful only when deliberately debugging a program.

info :: MonadDi Level path Message m => Message -> m ()

Log an informational message.

notice :: MonadDi Level path Message m => Message -> m ()

Log a condition that is not an error, but should possibly be handled specially.

warning :: MonadDi Level path Message m => Message -> m ()

Log a warning condition, such as an exception being gracefully handled or some missing configuration setting being assigned a default value.

error :: MonadDi Level path Message m => Message -> m ()

Log an error condition, such as an unhandled exception.

alert :: MonadDi Level path Message m => Message -> m ()

Log a condition that should be corrected immediately, such as a corrupted database.

critical :: MonadDi Level path Message m => Message -> m ()

Log a critical condition that could result in system failure, such as a disk running out of space.

emergency :: MonadDi Level path Message m => Message -> m ()

Log a message stating that the system is unusable.