Copyright | (c) Aaron Friel |
---|---|
License | BSD-3 |
Maintainer | Aaron Friel <mayreply@aaronfriel.com> |
Stability | unstable |
Portability | portable |
Safe Haskell | Safe |
Language | Haskell2010 |
- class GMonad m => GMonadFail m where
- type Fail m :: p
Documentation
class GMonad m => GMonadFail m where Source #
Graph indexed monad with failure.
gfail :: String -> m (Fail m) a Source #
Fail with a message.
Default implementation requires the default instance of Fail
.
gfail :: (GMonadZero m, Zero m ~ Fail m) => String -> m (Fail m) a Source #
Fail with a message.
Default implementation requires the default instance of Fail
.
Monad m => GMonadFail * (GWrapped m) Source # | |
IxMonadZero * m => GMonadFail (*, *) (WrappedIx m) Source # | |