[wg-camlp4] Time for a summary?

Hongbo Zhang hongboz at seas.upenn.edu
Tue Feb 5 14:15:34 GMT 2013

A cursory look at this proposal seems to me that it's beautiful. But I
guess it is not easy to give a robust implementation

On Tue, Feb 5, 2013 at 8:05 AM, Gabriel Scherer
<gabriel.scherer at gmail.com>wrote:

> There have been very good inputs by Alain, Leo, Hongbo and Jeremy.
> I've considered doing a summary as you request (after all, I have a
> blog to feed), but Leo promises that he has some more ideas that he
> would expose "early this week", so I've mostly been waiting for that.
> My opinionated one-paragraph (in fact one-list) take-away would be:
> - nobody apparently objects to Alain's idea of using lightweight
> quotations and annotations to mimic most existing extensions, and him
> and Leo have been busy discussing concrete syntax for that (see
> Alain's examples here :
> https://github.com/gasche/ocaml-syntax-extension-discussion/wiki/Use-Cases-using-light-annotations
> )
> - there is an ongoing discussion on the robustness of global rewrites
> and possible restrictions (Alain promotes the immediately available,
> low-tech social approach, Jeremy has a nice technical suggestion, Leo
> is going to write something, and a compromise *is* probably possible
> along the lines of encapsulating common local use cases as a strongly
> suggested library (like type-conv did for type-derived boilerplate))
> - Hongbo has been asking for a discussion on the AST definition at the
> core of syntax manipulations, but so far nobody had the courage to
> look in details into the polymorphic variant solution of Fan
> - relatedly, there is no consensus on the neededness and
> implementation of antiquotations; so far we're heading towards a
> solution where they are not well supported
> Hope that helped.
> On Tue, Feb 5, 2013 at 1:43 PM, Yaron Minsky <yminsky at janestreet.com>
> wrote:
> > There have been so many detailed and thoughtful emails that it's hard
> > to keep up with the deluge.  I would humbly submit that this would be
> > a good time for one of the organizers (Leo or Alain) to put together a
> > summary of the different positions that have been expressed about how
> > ppx might work, so that one could read over and think through those.
> > Right now, I have a hard time keeping the current state of the
> > conversation in my head, and I'm pretty sure I'm not alone.
> >
> > y
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-- Regards, Hongbo
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