{-# OPTIONS_GHC -Wunused-imports #-}
module Agda.Utils.Maybe.Strict
( module Data.Strict.Maybe
, module Data.Strict.Classes
, module Agda.Utils.Maybe.Strict
) where
import Prelude hiding (Maybe(..), maybe)
import Data.Strict.Classes
import Data.Strict.Maybe
import Agda.Utils.Null
instance Applicative Maybe where
pure :: forall a. a -> Maybe a
pure = a -> Maybe a
forall a. a -> Maybe a
Just
Just a -> b
f <*> :: forall a b. Maybe (a -> b) -> Maybe a -> Maybe b
<*> Just a
x = b -> Maybe b
forall a. a -> Maybe a
Just (b -> Maybe b) -> b -> Maybe b
forall a b. (a -> b) -> a -> b
$ a -> b
f a
x
Maybe (a -> b)
_ <*> Maybe a
_ = Maybe b
forall a. Maybe a
Nothing
instance Null (Maybe a) where
empty :: Maybe a
empty = Maybe a
forall a. Maybe a
Nothing
null :: Maybe a -> Bool
null = Maybe a -> Bool
forall a. Maybe a -> Bool
isNothing
unionMaybeWith :: (a -> a -> a) -> Maybe a -> Maybe a -> Maybe a
unionMaybeWith :: forall a. (a -> a -> a) -> Maybe a -> Maybe a -> Maybe a
unionMaybeWith a -> a -> a
f Maybe a
Nothing Maybe a
mb = Maybe a
mb
unionMaybeWith a -> a -> a
f Maybe a
ma Maybe a
Nothing = Maybe a
ma
unionMaybeWith a -> a -> a
f (Just a
a) (Just a
b) = a -> Maybe a
forall a. a -> Maybe a
Just (a -> Maybe a) -> a -> Maybe a
forall a b. (a -> b) -> a -> b
$ a -> a -> a
f a
a a
b
unzipMaybe :: Maybe (a,b) -> (Maybe a, Maybe b)
unzipMaybe :: forall a b. Maybe (a, b) -> (Maybe a, Maybe b)
unzipMaybe Maybe (a, b)
Nothing = (Maybe a
forall a. Maybe a
Nothing, Maybe b
forall a. Maybe a
Nothing)
unzipMaybe (Just (a
a,b
b)) = (a -> Maybe a
forall a. a -> Maybe a
Just a
a, b -> Maybe b
forall a. a -> Maybe a
Just b
b)
filterMaybe :: (a -> Bool) -> a -> Maybe a
filterMaybe :: forall a. (a -> Bool) -> a -> Maybe a
filterMaybe a -> Bool
p a
a
| a -> Bool
p a
a = a -> Maybe a
forall a. a -> Maybe a
Just a
a
| Bool
otherwise = Maybe a
forall a. Maybe a
Nothing
forMaybe :: [a] -> (a -> Maybe b) -> [b]
forMaybe :: forall a b. [a] -> (a -> Maybe b) -> [b]
forMaybe = ((a -> Maybe b) -> [a] -> [b]) -> [a] -> (a -> Maybe b) -> [b]
forall a b c. (a -> b -> c) -> b -> a -> c
flip (a -> Maybe b) -> [a] -> [b]
forall a b. (a -> Maybe b) -> [a] -> [b]
mapMaybe
caseMaybe :: Maybe a -> b -> (a -> b) -> b
caseMaybe :: forall a b. Maybe a -> b -> (a -> b) -> b
caseMaybe Maybe a
m b
err a -> b
f = b -> (a -> b) -> Maybe a -> b
forall b a. b -> (a -> b) -> Maybe a -> b
maybe b
err a -> b
f Maybe a
m
maybeM :: Monad m => m b -> (a -> m b) -> m (Maybe a) -> m b
maybeM :: forall (m :: * -> *) b a.
Monad m =>
m b -> (a -> m b) -> m (Maybe a) -> m b
maybeM m b
n a -> m b
j m (Maybe a)
mm = m b -> (a -> m b) -> Maybe a -> m b
forall b a. b -> (a -> b) -> Maybe a -> b
maybe m b
n a -> m b
j (Maybe a -> m b) -> m (Maybe a) -> m b
forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< m (Maybe a)
mm
fromMaybeM :: Monad m => m a -> m (Maybe a) -> m a
fromMaybeM :: forall (m :: * -> *) a. Monad m => m a -> m (Maybe a) -> m a
fromMaybeM m a
m m (Maybe a)
mm = m a -> (a -> m a) -> m (Maybe a) -> m a
forall (m :: * -> *) b a.
Monad m =>
m b -> (a -> m b) -> m (Maybe a) -> m b
maybeM m a
m a -> m a
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return m (Maybe a)
mm
caseMaybeM :: Monad m => m (Maybe a) -> m b -> (a -> m b) -> m b
caseMaybeM :: forall (m :: * -> *) a b.
Monad m =>
m (Maybe a) -> m b -> (a -> m b) -> m b
caseMaybeM m (Maybe a)
mm m b
err a -> m b
f = m b -> (a -> m b) -> m (Maybe a) -> m b
forall (m :: * -> *) b a.
Monad m =>
m b -> (a -> m b) -> m (Maybe a) -> m b
maybeM m b
err a -> m b
f m (Maybe a)
mm
ifJustM :: Monad m => m (Maybe a) -> (a -> m b) -> m b -> m b
ifJustM :: forall (m :: * -> *) a b.
Monad m =>
m (Maybe a) -> (a -> m b) -> m b -> m b
ifJustM m (Maybe a)
mm = (m b -> (a -> m b) -> m b) -> (a -> m b) -> m b -> m b
forall a b c. (a -> b -> c) -> b -> a -> c
flip (m (Maybe a) -> m b -> (a -> m b) -> m b
forall (m :: * -> *) a b.
Monad m =>
m (Maybe a) -> m b -> (a -> m b) -> m b
caseMaybeM m (Maybe a)
mm)
whenJust :: Monad m => Maybe a -> (a -> m ()) -> m ()
whenJust :: forall (m :: * -> *) a. Monad m => Maybe a -> (a -> m ()) -> m ()
whenJust Maybe a
m a -> m ()
k = Maybe a -> m () -> (a -> m ()) -> m ()
forall a b. Maybe a -> b -> (a -> b) -> b
caseMaybe Maybe a
m (() -> m ()
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return ()) a -> m ()
k
whenJustM :: Monad m => m (Maybe a) -> (a -> m ()) -> m ()
whenJustM :: forall (m :: * -> *) a.
Monad m =>
m (Maybe a) -> (a -> m ()) -> m ()
whenJustM m (Maybe a)
c a -> m ()
m = m (Maybe a)
c m (Maybe a) -> (Maybe a -> m ()) -> m ()
forall a b. m a -> (a -> m b) -> m b
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= (Maybe a -> (a -> m ()) -> m ()
forall (m :: * -> *) a. Monad m => Maybe a -> (a -> m ()) -> m ()
`whenJust` a -> m ()
m)