| Safe Haskell | None |
|---|---|
| Language | Haskell98 |
Data.Conduit.Lazy
Description
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.
- lazyConsume :: (MonadBaseControl IO m, MonadActive m) => Source m a -> m [a]
- class Monad m => MonadActive m where
- monadActive :: m Bool
Documentation
lazyConsume :: (MonadBaseControl IO m, MonadActive m) => Source m a -> m [a] Source
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 Source
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 Source
Instances
| MonadActive IO | |
| MonadActive Identity | |
| MonadActive (ST s) | |
| MonadActive (ST s) | |
| MonadActive m => MonadActive (MaybeT m) | |
| MonadActive m => MonadActive (ListT m) | |
| MonadActive m => MonadActive (IdentityT m) | |
| (MonadIO m, MonadActive m) => MonadActive (ResourceT m) | |
| (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) |