[ghc-steering-committee] #195 recommendation: accept

[Simon Peyton Jones]

It's really helpful if email of this kind includes a link to the proposal.   Here it is

https://github.com/ghc-proposals/ghc-proposals/pull/195

Simon

|  -----Original Message-----
|  From: ghc-steering-committee <ghc-steering-committee-bounces at haskell.org>
|  On Behalf Of Iavor Diatchki
|  Sent: 05 November 2019 16:44
|  To: ghc-steering-committee <ghc-steering-committee at haskell.org>
|  Subject: [ghc-steering-committee] #195 recommendation: accept
|  
|  Hello everyone,
|  
|  I am the shepherd for pull request #195 to wrap `Q (TExtp a)` into a
|  newtype synonym `Code a`.  The main change to the language is that the
|  special Template Haskell notation for typed splices will will work
|  with `Code a` rather than `Q (TExtp a)`.
|  
|  The benefit of having the newtype is that it makes it possible to
|  abstract over `Code`.  For example, you can work with typed name
|  environments like `MapF Name Code`, where `MapF` is an "indexed"
|  variant of `Map` which maps `Name a` to `Code a` (`MapF` is defined in
|  package `parameterized-utils` on hackage).
|  
|  Making typed TH work with `Code` directly avoids the need to
|  constantly switch between `Code` and `Q (TExp a)` and with the new
|  system users of typed TH are not likely to deal with the latter much
|  at all.
|  
|  For these reasons I recommend that we accept this proposal.  Please
|  let me know if you think otherwise.
|  
|  -Iavor
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