Data.Conduit.Lazy

Use lazy I/O for consuming the contents of a source. Warning: All normal warnings of lazy I/O apply. In particular, if you are using this with a ResourceT transformer, you must force the list to be evaluated before exiting the ResourceT.

Documentation

lazyConsume :: (MonadBaseControl IO m, MonadActive m) => Source m a -> m [a]

Use lazy I/O to consume all elements from a Source.

This function relies on monadActive to determine if the underlying monadic state has been closed.

Since 0.3.0

class Monad m => MonadActive m where

Determine if some monad is still active. This is intended to prevent usage of a monadic state after it has been closed. This is necessary for such cases as lazy I/O, where an unevaluated thunk may still refer to a closed ResourceT.

Since 0.3.0

Methods

monadActive :: m Bool

Instances

MonadActive IO

MonadActive Identity

MonadActive m => MonadActive (MaybeT m)

MonadActive m => MonadActive (ListT m)

MonadActive (ST s)

(MonadIO m, MonadActive m) => MonadActive (ResourceT m)

MonadActive m => MonadActive (IdentityT m)

MonadActive (ST s)

(Monoid w, MonadActive m) => MonadActive (WriterT w m)

(Monoid w, MonadActive m) => MonadActive (WriterT w m)

MonadActive m => MonadActive (StateT s m)

MonadActive m => MonadActive (StateT s m)

MonadActive m => MonadActive (ReaderT r m)

(Error e, MonadActive m) => MonadActive (ErrorT e m)

MonadActive m => MonadActive (ConduitM i o m)

(Monoid w, MonadActive m) => MonadActive (RWST r w s m)

(Monoid w, MonadActive m) => MonadActive (RWST r w s m)

MonadActive m => MonadActive (Pipe l i o u m)