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Within LTS Haskell 24.36 (ghc-9.10.3)
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tyConSingleAlgDataCon_maybe :: TyCon -> Maybe DataConghc GHC.Core.TyCon Like tyConSingleDataCon_maybe, but returns Nothing for newtypes.
tyConSingleDataCon_maybe :: TyCon -> Maybe DataConghc GHC.Core.TyCon If the given TyCon has a single data constructor, i.e. it is a data type with one alternative, a tuple type or a newtype then that constructor is returned. If the TyCon has more than one constructor, or represents a primitive or function type constructor then Nothing is returned.
tyConTuple_maybe :: TyCon -> Maybe TupleSortghc GHC.Core.TyCon No documentation available.
unwrapNewTyConEtad_maybe :: TyCon -> Maybe ([TyVar], Type, CoAxiom Unbranched)ghc GHC.Core.TyCon No documentation available.
unwrapNewTyCon_maybe :: TyCon -> Maybe ([TyVar], Type, CoAxiom Unbranched)ghc GHC.Core.TyCon Take a TyCon apart into the TyVars it scopes over, the Type it expands into, and (possibly) a coercion from the representation type to the newtype. Returns Nothing if this is not possible.
mapMaybeDTyConEnv :: (a -> Maybe b) -> DTyConEnv a -> DTyConEnv bghc GHC.Core.TyCon.Env No documentation available.
anonPiTyBinderType_maybe :: PiTyBinder -> Maybe Typeghc GHC.Core.Type Extract a relevant type, if there is one.
deepUserTypeError_maybe :: Type -> Maybe ErrorMsgTypeghc GHC.Core.Type No documentation available.
funTyConAppTy_maybe :: FunTyFlag -> Type -> Type -> Type -> Maybe (TyCon, [Type])ghc GHC.Core.Type Given the components of a FunTy figure out the corresponding TyConApp.
getCastedTyVar_maybe :: Type -> Maybe (TyVar, CoercionN)ghc GHC.Core.Type If the type is a tyvar, possibly under a cast, returns it, along with the coercion. Thus, the co is :: kind tv ~N kind ty