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Re: [Swig-user] swig guile2

From: Tristan Colgate
Subject: Re: [Swig-user] swig guile2
Date: Fri, 8 Apr 2011 07:53:55 +0100

I've reworked it so that it is a replacement for the existing guile
module and have made some headway on the test suite (much of it now
"passes", in that the test cases don't give errors/warnings, but I'd
like to rework it to actually run a few more tests rather than just

  The big gap at the moment is documentation, and the linkage options
(which I don't fully understand yet).

  I will keep you posted on my progress.

On 25 March 2011 20:14, William S Fulton <address@hidden> wrote:
> On 22/03/11 08:16, Tristan Colgate wrote:
>> On 21 March 2011 20:32, William S Fulton<address@hidden>  wrote:
>>> Are you proposing a 2nd SWIG Guile module in addition to the current
>>> module?
>>   The code as it stands is exactly that, a new module. I have worked
>> under the assumption that breaking the existing guile support was
>> taboo.
>>> I am no guile user, so can't help on the Guile side. The guile SWIG
>>> module
>>> is suffering neglect and doesn't seem to work with modern versions of
>>> Guile
>>> - the test-suite fails for me. Only very rarely are there Guile queries
>>> on
>>> the SWIG mailing list, so suspect it isn't used much. Would it make sense
>>> to
>>> drop the older Guile interface altogether and just use Guile 2?
>>   The existing guile module support the gh_ interface and the older
>> version of the SCM interface. It also doesn't work with guiles current
>> GC. It's entirely useless for the current version of guile. I had
>> assumed that since SWIG still ships it, enough people care about
>> legacy guile support to not want it broken.
>>   I've only just started looking into getting the test-suite working
>> with my guile2 work, but I do intend on getting it to the point where
>> it all passes.
> If it all passes, it will then be good enough to commit to trunk and to be
> included in future SWIG releases. Please discuss on swig-devel if you get to
> this stage.
>>   For me personally, the old guile module is no longer useful.
>> However, guile 2.0 is not widely deployed in distributions yet and
>> that may take some time.
>>> BTW, there
>>> is the swig -scm option for guile 1.6+. So there seems to be GH and SCM
>>> and
>>> now guile 2 API... does that sound right that there are so many C
>>> interfaces
>>> or is your Guile 2 interface just SCM?
>>   The -scm support works by mapping the old SCM interface to the GH
>> interface.. Almost all the scm_ calls used by the existing guile
>> module are deprecated. I tried implementing and -scm2 option within
>> the existing module but it was more awkward than I could bare.
>>   I'm not sure that there is going to be enormous support for this
>> within the guile community either really. Guile 2 ships with a new FFI
>> and using that is, obviosuly, of more interest to them. I've struggled
>> wrapping legacy APIs with it though and SWIG really is rather good.
> Well if you get the new version up to scratch perhaps SWIG could just
> support Guile 2 and later unless someone really objects. The older Guile
> would then require earlier versions of SWIG.
> William

Tristan Colgate-McFarlane
  "You can get all your daily vitamins from 52 pints of guiness, and a
glass of milk"

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