| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
Bluefin.Writer
Description
This is an old interface and will be deprecated in the future. You are encouraged to use Bluefin.Capability.Writer instead.
Synopsis
- type Writer = Tell
- runWriter :: forall w (es :: Effects) r. Monoid w => (forall (e :: Effects). Writer w e -> Eff (e :& es) r) -> Eff es (r, w)
- execWriter :: forall w (es :: Effects) r. Monoid w => (forall (e :: Effects). Writer w e -> Eff (e :& es) r) -> Eff es w
- tell :: forall (e :: Effects) (es :: Effects) w. e <: es => Tell w e -> w -> Eff es ()
Documentation
In most cases you'll probably prefer Stream
to Writer, but Writer can still be useful in some cases,
for example with Data.Monoid. to determine
whether an event ever occurred.Any
Handle
Handlers
runWriter :: forall w (es :: Effects) r. Monoid w => (forall (e :: Effects). Writer w e -> Eff (e :& es) r) -> Eff es (r, w) #
execWriter :: forall w (es :: Effects) r. Monoid w => (forall (e :: Effects). Writer w e -> Eff (e :& es) r) -> Eff es w #