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1. kindBoxedRepLevity_maybe :: Type -> Maybe Levity

   ghc	GHC.Plugins

   Check whether a kind is of the form `TYPE (BoxedRep Lifted)` or `TYPE (BoxedRep Unlifted)`. Returns:

   • `Just Lifted` for `TYPE (BoxedRep Lifted)` and Type,
   • `Just Unlifted` for `TYPE (BoxedRep Unlifted)` and UnliftedType,
   • Nothing for anything else, e.g. `TYPE IntRep`, `TYPE (BoxedRep l)`, etc.

2. kindRep_maybe :: HasDebugCallStack => Kind -> Maybe RuntimeRepType

   ghc	GHC.Plugins

   Given a kind (TYPE rr) or (CONSTRAINT rr), extract its RuntimeRep classifier rr. For example, kindRep_maybe * = Just LiftedRep Returns Nothing if the kind is not of form (TYPE rr)

3. levityType_maybe :: LevityType -> Maybe Levity

   ghc	GHC.Plugins

   levityType_maybe takes a Type of kind Levity, and returns its levity May not be possible for a type variable or type family application

4. lookupIdSubst_maybe :: HasDebugCallStack => Subst -> Id -> Maybe CoreExpr

   ghc	GHC.Plugins

   No documentation available.

5. mapMaybeOccEnv :: (a -> Maybe b) -> OccEnv a -> OccEnv b

   ghc	GHC.Plugins

   mapMaybe for b OccEnv.

6. mapMaybeOccEnv :: (a -> Maybe b) -> OccEnv a -> OccEnv b

   ghc	GHC.Plugins

   mapMaybe for b OccEnv.

7. mkBoxedRepApp_maybe :: LevityType -> Maybe Type

   ghc	GHC.Plugins

   Given a Levity, apply BoxedRep to it On the fly, rewrite BoxedRep Lifted --> liftedRepTy (a synonym) BoxedRep Unlifted --> unliftedRepTy (ditto) See Note [TYPE and CONSTRAINT] in GHC.Builtin.Types.Prim. See Note [Using synonyms to compress types] in GHC.Core.Type

8. mkCONSTRAINTapp_maybe :: RuntimeRepType -> Maybe Type

   ghc	GHC.Plugins

   Just like mkTYPEapp_maybe

9. mkTYPEapp_maybe :: RuntimeRepType -> Maybe Type

   ghc	GHC.Plugins

   Given a RuntimeRep, applies TYPE to it. On the fly it rewrites TYPE LiftedRep --> liftedTypeKind (a synonym) TYPE UnliftedRep --> unliftedTypeKind (ditto) TYPE ZeroBitRep --> zeroBitTypeKind (ditto) NB: no need to check for TYPE (BoxedRep Lifted), TYPE (BoxedRep Unlifted) because those inner types should already have been rewritten to LiftedRep and UnliftedRep respectively, by mkTyConApp see Note [TYPE and CONSTRAINT] in GHC.Builtin.Types.Prim. See Note [Using synonyms to compress types] in GHC.Core.Type

10. mkTupleRepApp_maybe :: Type -> Maybe Type

    ghc	GHC.Plugins

    Given a `[RuntimeRep]`, apply TupleRep to it On the fly, rewrite TupleRep [] -> zeroBitRepTy (a synonym) See Note [TYPE and CONSTRAINT] in GHC.Builtin.Types.Prim. See Note [Using synonyms to compress types] in GHC.Core.Type

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