Yes, I agree that we need functions in both directions. I support this proposal. Richard

On Mar 8, 2019, at 12:03 PM, Iavor Diatchki wrote:

I agree that we should probably accept this.

I wonder if there are cases where one might one to go in the other direction, i.e., do we also need a function: `Code a -> Q (TExp a)`?

-Iavor

On Fri, Mar 8, 2019 at 12:51 AM Simon Peyton Jones via ghc-steering-committee mailto:ghc-steering-committee@haskell.org> wrote: Yes, I agree.

Simon

From: ghc-steering-committee mailto:ghc-steering-committee-bounces@haskell.org> On Behalf Of Vitaly Bragilevsky Sent: 08 March 2019 06:41 To: ghc-steering-committee mailto:ghc-steering-committee@haskell.org> Subject: [ghc-steering-committee] #195: Make Q (TExp a) into a newtype, rec: accept

Hi everyone,

Matthew Pickering proposed to make Q (TExp a) into a newtype called Code.

Proposal #195: https://github.com/ghc-proposals/ghc-proposals/blob/22e97d7693edb0b3676c948a... https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fghc-proposals%2Fghc-proposals%2Fblob%2F22e97d7693edb0b3676c948a123e57ea93c462e3%2Fproposals%2F0000-code-texp.rst&data=02%7C01%7Csimonpj%40microsoft.com%7C283dee8b70474ae9761308d6a3910fb5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636876240764020521&sdata=Cq32fdykV9oonakOOFbAnV7LulmupHXHq0p2c9raKFs%3D&reserved=0 Pull request discussion: https://github.com/ghc-proposals/ghc-proposals/pull/195 https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fghc-proposals%2Fghc-proposals%2Fpull%2F195&data=02%7C01%7Csimonpj%40microsoft.com%7C283dee8b70474ae9761308d6a3910fb5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636876240764030529&sdata=6CqagCiMbgVgSgmWeLTcDbauGsB111fn7DOyuMiXemI%3D&reserved=0

It looks like the motivation behind this proposal boils down to the convenience of writing instances which seems a good thing. The minor problem I see is the proposed name "Code" as it looks a little bit too abstract for Typed Template Haskell expressions. Nevertheless, I recommend to accept the proposal as it is. Silence is understood as agreement.

Regards,

Vitaly

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