Yes -- I'm in support.

On Aug 25, 2023, at 12:12 PM, Simon Peyton Jones wrote:

I support this.

Simon

On Fri, 25 Aug 2023 at 15:39, Joachim Breitner mailto:mail@joachim-breitner.de> wrote: Dear committee,

Vladislav Zavialov in https://github.com/ghc-proposals/ghc-proposals/pull/605 https://github.com/ghc-proposals/ghc-proposals/pull/605 proposes a small fix to #281, namely that for

f :: forall x -> Show x => x -> String f (type t) = show @t

to work, ExplicitNamespaces and RequiredTypeArguments is sufficient, and we should not also require ScopedTypeVariables, which we are moving away from.

I’ll shepherd this myself, and I suggest acceptance.

Cheers, Joachim

-- Joachim Breitner mail@joachim-breitner.de mailto:mail@joachim-breitner.de http://www.joachim-breitner.de/ http://www.joachim-breitner.de/

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I don't remember the details, but I assume that -XRequiredTypeArguments is essentially useless without this sort of patterns, isn't it? Plus this is the only occurrence of -XScopedTypeVariables in the text (well, there's one just below, but it's about what -XScopedTypeVariables *doesn't* do). It sounds like the right choice. On Fri, 25 Aug 2023 at 21:54, Adam Gundry wrote:

Agreed, we shouldn't require ScopedTypeVariables here.

Adam

On 25/08/2023 20:32, Richard Eisenberg wrote:

...

Yes -- I'm in support.

...

On Aug 25, 2023, at 12:12 PM, Simon Peyton Jones mailto:simon.peytonjones@gmail.com> wrote:

I support this.

Simon

On Fri, 25 Aug 2023 at 15:39, Joachim Breitner mailto:mail@joachim-breitner.de> wrote:

Dear committee,

Vladislav Zavialov in https://github.com/ghc-proposals/ghc-proposals/pull/605 https://github.com/ghc-proposals/ghc-proposals/pull/605 proposes a small fix to #281, namely that for

f :: forall x -> Show x => x -> String f (type t) = show @t

to work, ExplicitNamespaces and RequiredTypeArguments is sufficient, and we should not also require ScopedTypeVariables, which we are moving away from.

I’ll shepherd this myself, and I suggest acceptance.

Cheers, Joachim

-- Joachim Breitner mail@joachim-breitner.de mailto:mail@joachim-breitner.de http://www.joachim-breitner.de/ http://www.joachim-breitner.de/

-- Adam Gundry, Haskell Consultant Well-Typed LLP, https://www.well-typed.com/

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