diff options
Diffstat (limited to 'libraries/base/Data')
| -rw-r--r-- | libraries/base/Data/Typeable/Internal.hs | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/libraries/base/Data/Typeable/Internal.hs b/libraries/base/Data/Typeable/Internal.hs index 547fd13d62..008ac1b81b 100644 --- a/libraries/base/Data/Typeable/Internal.hs +++ b/libraries/base/Data/Typeable/Internal.hs @@ -79,7 +79,7 @@ module Data.Typeable.Internal ( -- | These are for internal use only mkTrType, mkTrCon, mkTrApp, mkTrAppChecked, mkTrFun, mkTyCon, mkTyCon#, - typeSymbolTypeRep, typeNatTypeRep, + typeSymbolTypeRep, typeNatTypeRep, typeCharTypeRep ) where import GHC.Prim ( FUN ) @@ -90,7 +90,7 @@ import Data.Type.Equality import GHC.List ( splitAt, foldl', elem ) import GHC.Word import GHC.Show -import GHC.TypeLits ( KnownSymbol, symbolVal', AppendSymbol ) +import GHC.TypeLits ( KnownChar, charVal', KnownSymbol, symbolVal', AppendSymbol ) import GHC.TypeNats ( KnownNat, Nat, natVal' ) import Unsafe.Coerce ( unsafeCoerce ) @@ -986,11 +986,17 @@ typeNatTypeRep = typeLitTypeRep (show (natVal' (proxy# @a))) tcNat typeSymbolTypeRep :: forall a. KnownSymbol a => TypeRep a typeSymbolTypeRep = typeLitTypeRep (show (symbolVal' (proxy# @a))) tcSymbol +-- | Used to make `'Typeable' instance for things of kind Char +typeCharTypeRep :: forall a. KnownChar a => TypeRep a +typeCharTypeRep = typeLitTypeRep (show (charVal' (proxy# @a))) tcChar + mkTypeLitFromString :: TypeLitSort -> String -> SomeTypeRep mkTypeLitFromString TypeLitSymbol s = SomeTypeRep $ (typeLitTypeRep s tcSymbol :: TypeRep Symbol) mkTypeLitFromString TypeLitNat s = SomeTypeRep $ (typeLitTypeRep s tcNat :: TypeRep Nat) +mkTypeLitFromString TypeLitChar s = + SomeTypeRep $ (typeLitTypeRep s tcChar :: TypeRep Char) tcSymbol :: TyCon tcSymbol = typeRepTyCon (typeRep @Symbol) @@ -998,6 +1004,9 @@ tcSymbol = typeRepTyCon (typeRep @Symbol) tcNat :: TyCon tcNat = typeRepTyCon (typeRep @Nat) +tcChar :: TyCon +tcChar = typeRepTyCon (typeRep @Char) + -- | An internal function, to make representations for type literals. typeLitTypeRep :: forall k (a :: k). (Typeable k) => String -> TyCon -> TypeRep a |