Re: TupleT type constructor
"Alfonso Acosta" <[email protected]> Mon, 5 Nov 2007 19:57:01 +0100
| Newsgroups | gmane.comp.lang.haskell.template |
|---|---|
| Message-ID | <[email protected]> |
I've been thinking about it for a while and the special TupleT constructor still seems pretty useful. However, I think it should only be kept if there's a way to guarantee that reify is consistent with the definition of Type (i.e. it should alwa produce TupleT and not "ConT ''(,,,)" and friends ) Furthermore I would find it more appropiate to split Type into Constructors and Types themselves (just like it happens in Data.Typeable and Language.Haskell.Syntax) data Cons = Cons Name | SpecialCons data SpecialCons = Arrow | Tuple Int | List data Type = ForallT [Name] Cxt Type | VarT ConT Cons | AppT Type Type On 11/2/07, Alfonso Acosta <[email protected]> wrote: > On 11/2/07, Simon Peyton-Jones <[email protected]> wrote: > > I agree. As in: I would not be opposed to removing it. But we'd just need to be sure there was a convenient way of conjuring up the appropriate data constructor for an n-tuple. > > TH.Syntax already provides: > > tupleTypeName :: Int -> Name > tupleDataName :: Int -> Name > > IMHO, that should be enough >