Re: (sxml match)

[ludo@gnu.org (Ludovic Courtès)]

Hi Andy!

Andy Wingo <wingo@pobox.com> writes:

> On Tue 25 May 2010 23:42, ludo@gnu.org (Ludovic Courtès) writes:

>> I integrated the doc in the manual.  Unfortunately it can’t be made to
>> appear close to the automatically generated doc of (sxml simple), so it
>> actually appears before.  I’m open to suggestions to improve that.
>
> You could put the documentation in the module commentary of (sxml
> match), as texinfo. Or you could extend module-commentary somehow to
> look for commentaries in other sources. Probably easiest just to paste
> the texinfo you already wrote into the commentary, no?

Actually I don’t want that much Texinfo in a Scheme file, and I don’t
want the automatically-generated “Usage” subsection.

Besides, I initially started by just putting ‘@include sxml-match.texi’
in the module’s commentary but that didn’t work (I forgot the details.)

>> The test suite reveals an interesting psyntax “problem”: renaming the
>> ‘xyzpq’ variable in sxml-match-tests.ss to ‘x’ leads to:
>>
>> ERROR: In procedure macroexpand:
>> ERROR: identifier out of context in subform `x' of `(quote (d (a 1 2 3) (a 4 5) (a 6 7 8) (a 9 10)))'
>>
>> Ideas?
>>
>> (Would be good if psyntax error reporting contained source location
>> info.)
>
> It would certainly be possible to maintain a stack of source locations
> in the expander, and modify syntax-violation to look in that stack.
>
> There is also the possibility of simply inspecting the syntax objects
> given to syntax-violation for source info, but it might not be there --
> best to have a stack to at least give approximate info.

Thanks for the hints, I’ll try to look into it.

I note that you subtly omitted to comment on the issue above.  :-)

Thanks,
Ludo’.