[opam-devel] [wg-camlp4] Changes to the parsetree

[Thomas Gazagnaire]

> Thomas, any objections to me doing this rearrangement in OCamlPro/opam-repository?

No pb. I am just a bit concerned with the list of compilers growing unbounded, but for now I think it's completely fine.

Thomas

> 
> -anil
> 
> On 26 Mar 2013, at 15:15, Mike McClurg <mike.mcclurg at gmail.com> wrote:
> 
>> Hi Alain,
>> 
>> Thanks for writing up that proposal. Is the code in your extension_points branch ready for testing at all yet?
>> 
>> On a separate note, might it be a good idea to add an opam-repo-dev repository to github.com/ocaml, which would provide opam switches for all the experimental OCaml branches, such as extension_points? Or is there such an experimental opam repo out there already?
>> 
>> Mike
>> 
>> 
>> On Mon, Mar 25, 2013 at 6:49 PM, Alain Frisch <alain.frisch at lexifi.com> wrote:
>> On 03/25/2013 03:13 PM, jathdr wrote:
>> Could we get a summary of the current syntax proposal? I've been
>> following along, but I'm a bit lost as to what has been discussed,
>> accepted, rejected, etc.
>> 
>> This file describes the current syntax proposal:
>> 
>> http://caml.inria.fr/cgi-bin/viewvc.cgi/ocaml/branches/extension_points/experimental/frisch/extension_points.txt?revision=HEAD&view=markup
>> 
>> 
>> 
>> This is probably a bit off topic, but while we're talking about
>> interval patterns: I discovered the other day that interval patterns
>> only work for chars, while I always assumed they also worked for
>> ints. Is there a reason why they don't?
>> 
>> Currently, range patterns for characters are expanded in the parser. Doing so for integers as well could lead to huge or-patterns to be processed by the rest of the compiler.  Supporting range patterns directly in the compiler would add a little bit of extra complexity for type-checking (exhaustiveness check) and code generation.  I don't see any theoretical problem, though.
>> 
>> 
>> -- Alain
>> 
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