[ghc-steering-committee] Type-level type applications (#80): Recommend accept

Simon Marlow marlowsd at gmail.com
Mon Feb 26 09:04:30 UTC 2018


Agreed.

On 23 February 2018 at 20:32, Richard Eisenberg <rae at cs.brynmawr.edu> wrote:

> This proposal (https://github.com/ghc-proposals/ghc-proposals/pull/80)
> introduces type-level type applications, extending the existing
> TypeApplications syntax to work in types.
>
> - With -XTypeApplications, you will be able to instantiate kind variables
> in types. For example, you could talk about `Proxy @(Type -> Type) Maybe`
> and `Category @(TYPE IntRep) (->)` or even `(->) @(TYPE LiftedRep) @(TYPE
> DoubleRep)`.
>
> And that's it! GHC *already* has the required/specified/inferred
> distinction in terms, which is unchanged in types.
>
> I believe strongly we should accept. There was no substantive dissenting
> commentary, just clarifying questions.
>
> Thanks,
> Richard
>
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