Re: Minor Comments on Polishing ExprComment

Hi Sean.  Thanks for the feedback.

Isn't your issue covered by the longest token rule ("When tokenizing, the 
longest possible match that is valid in the current lexical state is 
preferred .")?  I understand that means you can't have a comment opening 
followed immediately by a colon... but I think the only thing to do for 
that is to change the characters used in one of the delimiters.  It's late 
at night and I might be misreading your note, so forgive me if I'm not on 
target.

> (Moreover, since Pragma and MUExtension seem to follow a common idiom, 
and
> one which may well be extended in future versions of XQuery, perhaps 
it'd
> be wiser to group them under a common Extension production.)

Makes sense to me.  I would be open to that. 

-scott

public-qt-comments-request@w3.org wrote on 09/10/2003 10:20:15 AM:

> 
> The ExprComment production [1] of XQuery also matches that of Pragma and
> MUExtension. Since these can occur in the same lexical context (state) 
as
> one another, I suggest that one of the following routes be taken:
> 
> * ExprComment be re-written to explicitly disallow Pragma and 
MUExtension.
> (Moreover, since Pragma and MUExtension seem to follow a common idiom, 
and
> one which may well be extended in future versions of XQuery, perhaps 
it'd
> be wiser to group them under a common Extension production.)
> * A note added that parsers must look ahead when matching ExprComment's
> opening terminal, so that they don't pick up a Pragma or MUExtension
> production instance.
> 
> Here is a possibility for re-written comment and extension productions,
> should that route be taken:
> 
> ExprComment ::= "(:" ExprCommentContent ":)"
> Extension ::= "(::" QName QName ExtensionContent "::)"
> ExprCommentContent ::= (Char - ":") (Char* - ":)")
> ExtensionContent ::= ((Char - ':') | (':' (Char - ':')))*
> 
> Colophon, from #rdfig on Freenode:
> 
> <darobin> bah, python has bindings to libxslt, what more do you need ? 
:)
> <sbp`> that's odd. I'm starting to see smileys as XQuery comments
> 
> Cheers,
> 
> [1] http://www.w3.org/TR/2003/WD-xquery-20030822/#comments
> - W3C Working Draft 22 August 2003
> 
> -- 
> Sean B. Palmer, <http://purl.org/net/sbp/>
> "phenomicity by the bucketful" - http://miscoranda.com/
>