-- Hoogle documentation, generated by Haddock
-- See Hoogle, http://www.haskell.org/hoogle/


-- | Library to convert polymorphic datatypes to/from its monomorphic represetation
--   
--   This library provides the type-class and functions to convert between
--   polymorphic data-types and its monomorphic representation type, such
--   as length-indexed vectors, singletons for type-level natural numbers,
--   etc.
@package monomorphic
@version 0.0.3.2

module Data.Type.Monomorphic

-- | A wrapper type for polymophic types.
data Monomorphic k
Monomorphic :: (k a) -> Monomorphic k

-- | A types which have the monomorphic representation.
class Monomorphicable k where type family MonomorphicRep k :: *
promote :: Monomorphicable k => MonomorphicRep k -> Monomorphic k
demote :: Monomorphicable k => Monomorphic k -> MonomorphicRep k

-- | Convinience function to demote polymorphic types into monomorphic one
--   directly.
demote' :: Monomorphicable k => k a -> MonomorphicRep k

-- | Demote polymorphic nested types directly into monomorphic
--   representation.
demoteComposed :: Monomorphicable (f :.: g) => f (g a) -> MonomorphicRep (f :.: g)
monomorphicCompose :: f (g a) -> Monomorphic (f :.: g)

-- | Apply dependently-typed function to the monomorphic representation.
withPolymorhic :: Monomorphicable k => MonomorphicRep k -> (forall a. k a -> b) -> b

-- | Flipped version of <a>withPolymorhic</a>.
liftPoly :: Monomorphicable k => (forall a. k a -> b) -> MonomorphicRep k -> b

-- | Demote the function between polymorphic types into the one between
--   monomorphic one.
viaPoly :: (Monomorphicable k, Monomorphicable k') => (forall x y. k x -> k' y) -> MonomorphicRep k -> MonomorphicRep k'
newtype (:.:) f g a
Comp :: (f (g a)) -> :.: f g a
instance (Read (MonomorphicRep k k1), Monomorphicable k k1) => Read (Monomorphic k k1)
instance (Show (MonomorphicRep k k1), Monomorphicable k k1) => Show (Monomorphic k k1)