Portability | ghc |
---|---|
Stability | beta |
Maintainer | Neil Sculthorpe <neil@ittc.ku.edu> |
Safe Haskell | Safe-Inferred |
- idR :: Monad m => Rewrite c m a
- successT :: Monad m => Transform c m a ()
- contextT :: Monad m => Transform c m a c
- exposeT :: Monad m => Transform c m a (c, a)
- liftContext :: (c -> c') -> Transform c' m a b -> Transform c m a b
- readerT :: (a -> Transform c m a b) -> Transform c m a b
- resultT :: (m b -> n d) -> Transform c m a b -> Transform c n a d
- catchesT :: MonadCatch m => [Transform c m a b] -> Transform c m a b
- mapT :: (Traversable t, Monad m) => Transform c m a b -> Transform c m (t a) (t b)
- joinT :: Transform c m (m a) a
- guardT :: Monad m => Transform c m Bool ()
- tryR :: MonadCatch m => Rewrite c m a -> Rewrite c m a
- andR :: (Foldable f, Monad m) => f (Rewrite c m a) -> Rewrite c m a
- orR :: (Functor f, Foldable f, MonadCatch m) => f (Rewrite c m a) -> Rewrite c m a
- (>+>) :: MonadCatch m => Rewrite c m a -> Rewrite c m a -> Rewrite c m a
- repeatR :: MonadCatch m => Rewrite c m a -> Rewrite c m a
- acceptR :: Monad m => (a -> Bool) -> Rewrite c m a
- acceptWithFailMsgR :: Monad m => (a -> Bool) -> String -> Rewrite c m a
- accepterR :: Monad m => Transform c m a Bool -> Rewrite c m a
- changedR :: (MonadCatch m, Eq a) => Rewrite c m a -> Rewrite c m a
- changedByR :: MonadCatch m => (a -> a -> Bool) -> Rewrite c m a -> Rewrite c m a
- sideEffectR :: Monad m => (c -> a -> m ()) -> Rewrite c m a
- data AnyR m a
- wrapAnyR :: MonadCatch m => Rewrite c m a -> Rewrite c (AnyR m) a
- unwrapAnyR :: Monad m => Rewrite c (AnyR m) a -> Rewrite c m a
- data OneR m a
- wrapOneR :: MonadCatch m => Rewrite c m g -> Rewrite c (OneR m) g
- unwrapOneR :: Monad m => Rewrite c (OneR m) a -> Rewrite c m a
Transformation Combinators
liftContext :: (c -> c') -> Transform c' m a b -> Transform c m a bSource
Lift a transformation to operate on a derived context.
readerT :: (a -> Transform c m a b) -> Transform c m a bSource
Look at the argument to the transformation before choosing which Transform
to use.
resultT :: (m b -> n d) -> Transform c m a b -> Transform c n a dSource
Convert the monadic result of a transformation into a result in another monad.
catchesT :: MonadCatch m => [Transform c m a b] -> Transform c m a bSource
Attempt each trransformation until one succeeds, then return that result and discard the rest of the transformations.
mapT :: (Traversable t, Monad m) => Transform c m a b -> Transform c m (t a) (t b)Source
Map a transformation over a list.
guardT :: Monad m => Transform c m Bool ()Source
Fail if the Boolean is False, succeed if the Boolean is True.
Rewrite Combinators
tryR :: MonadCatch m => Rewrite c m a -> Rewrite c m aSource
Catch a failing rewrite, making it into an identity.
andR :: (Foldable f, Monad m) => f (Rewrite c m a) -> Rewrite c m aSource
Perform a collection of rewrites in sequence, requiring all to succeed.
orR :: (Functor f, Foldable f, MonadCatch m) => f (Rewrite c m a) -> Rewrite c m aSource
Perform a collection of rewrites in sequence, succeeding if any succeed.
(>+>) :: MonadCatch m => Rewrite c m a -> Rewrite c m a -> Rewrite c m aSource
Perform two rewrites in sequence, succeeding if one or both succeed.
repeatR :: MonadCatch m => Rewrite c m a -> Rewrite c m aSource
Repeat a rewrite until it fails, then return the result before the failure. Requires at least the first attempt to succeed.
acceptR :: Monad m => (a -> Bool) -> Rewrite c m aSource
Look at the argument to a rewrite, and choose to be either idR
or a failure.
acceptWithFailMsgR :: Monad m => (a -> Bool) -> String -> Rewrite c m aSource
As acceptR
, but takes a custom failure message.
changedR :: (MonadCatch m, Eq a) => Rewrite c m a -> Rewrite c m aSource
Makes an rewrite fail if the result value equals the argument value.
changedByR :: MonadCatch m => (a -> a -> Bool) -> Rewrite c m a -> Rewrite c m aSource
sideEffectR :: Monad m => (c -> a -> m ()) -> Rewrite c m aSource
An identity rewrite with side-effects.
Monad Transformers
anyR Support
These are useful when defining congruence combinators that succeed if any child rewrite succeeds. See the "Expr" example, or the HERMIT package.
The AnyR
transformer, in combination with wrapAnyR
and unwrapAnyR
,
causes a sequence of rewrites to succeed if at least one succeeds, converting failures to
identity rewrites.
Monad m => Monad (AnyR m) | |
Monad m => Functor (AnyR m) | |
Monad m => Applicative (AnyR m) | |
MonadCatch m => MonadCatch (AnyR m) |
oneR Support
These are useful when defining congruence combinators that succeed if one child rewrite succeeds (and the remainder are then discarded). See the "Expr" example, or the HERMIT package.
The OneR
transformer, in combination with wrapOneR
and unwrapOneR
,
causes a sequence of rewrites to only apply the first success, converting the remainder (and failures) to identity rewrites.
Monad m => Monad (OneR m) | |
Monad m => Functor (OneR m) | |
Monad m => Applicative (OneR m) | |
MonadCatch m => MonadCatch (OneR m) |