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Today's Topics:

   1.  Viewing desugared classes and instances (PATRICK BROWNE)


Message: 1
Date: Wed, 21 Feb 2018 17:15:10 +0000
To: The Haskell-Beginners Mailing List - Discussion of primarily
        beginner-level topics related to Haskell <>
Subject: [Haskell-beginners] Viewing desugared classes and instances
Content-Type: text/plain; charset="utf-8"

In the Haskell litrature desugaring of type clases to a data type is
For example:
class Foo a where
    quux :: a -> Int
    muux :: a -> Bool
Desugared to
data FooD a = FooD          -- class Foo a where
    { quuxD :: a -> Int     --    quux :: a -> Int
    , muuxD :: a -> Bool    --    muux :: a -> Bool

Is there any way using core dumps to actuall view the desugring of classes,
sub-classes, and instances, in my own code?
I have tried:
ghc -c -ddump-ds Foo.hs
But I cannot understand the output.



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