finally package:streamly

Run the action m b whenever the stream Stream m a stops normally, aborts due to an exception or if it is garbage collected after a partial lazy evaluation. The semantics of running the action m b are similar to the cleanup action semantics described in bracket.

>>> finally action xs = Stream.bracket (return ()) (const action) (const xs)

See also finally_ Inhibits stream fusion

Run the action m b whenever the stream t m a stops normally, aborts due to an exception or if it is garbage collected after a partial lazy evaluation. The semantics of running the action m b are similar to the cleanup action semantics described in bracket. See also finally_ Inhibits stream fusion

Unfold the input a using Unfold m a b, run an action on a whenever the unfold stops normally, aborts due to an exception or if it is garbage collected after a partial lazy evaluation. The semantics of the action a -> m c are similar to the cleanup action semantics in bracket.

finally release = bracket return release

See also finally_ Inhibits stream fusion Pre-release

Like finally with following differences:

• action m b won't run if the stream is garbage collected after partial evaluation.
• does not require a MonadAsync constraint.
• has slightly better performance than finally.

Inhibits stream fusion Pre-release