Control.Monad.Trans.Journal

Contents

Description

Monad transformer version of MonadJournal. JournalT provides journaling over a monad.

This modules defines a few useful instances. Check the list below for further information.

Synopsis

JournalT monad transformer

Transformer version of MonadJournal.

Instances

MonadBase b m => MonadBase b (JournalT w m) Source
(Monoid w, MonadBaseControl b m) => MonadBaseControl b (JournalT w m) Source
MonadError e m => MonadError e (JournalT w m) Source
MonadReader r m => MonadReader r (JournalT w m) Source
MonadState s m => MonadState s (JournalT w m) Source
MonadWriter w' m => MonadWriter w' (JournalT w m) Source
(Monoid w, Monad m) => MonadJournal w (JournalT w m) Source
MonadTrans (JournalT w) Source
Monoid w => MonadTransControl (JournalT w) Source
Monad m => Monad (JournalT w m) Source
Functor m => Functor (JournalT w m) Source
Monad m => Applicative (JournalT w m) Source
MonadPlus m => Alternative (JournalT w m) Source
MonadPlus m => MonadPlus (JournalT w m) Source
MonadIO m => MonadIO (JournalT w m) Source
type StT (JournalT w) a = (a, w) Source
type StM (JournalT w m) a = ComposeSt (JournalT w) m a Source

Retrieve the value and the log history.

Only retrieve the value.

Only retrieve the log history.

Re-exported