[ESS] synthax higlighting \Sexpr in .Rnw files

[Tim Hesterberg]

It would be nice if \Sexpr were handled like a \verb construct.
>From poking around in tex-mode.el, I suspect that the way
to do this is to modify
	tex-font-lock-syntactic-keywords
but I haven't figured out the right syntax.

>On Wed, Nov 18, 2009 at 11:24 AM, Emanuel Heitlinger
><emanuelheitlinger at googlemail.com> wrote:
>> Hi List,
>>
>> editing the .Rnw files of Sweave/Noweb I have a problem with
>> \Sexpr{whatever$name}:
>
>An equivalent, and less problematic, expression is
>
>\Sexpr{whatever[["name"]]}
>
>It's a bit more typing but it doesn't have the problem of LaTeX-mode
>and R-mode fighting over the interpretation of the $ symbol.
>
>In some ways the surprising thing about a hybrid like Sweave and ESS
>support of Sweave is not that sometimes some aspects get confused but
>that it works at all.
>
>> The $ makes Latex-mode use font-latex-math-face (according to M-x
>> describe-text-properties).
>>
>> How to make Latex-mode aware of \Sexpr?
>> Where to look for the Regexp that control highlighting in Latex-mode?
>> Or is there another workaround to be defined in Noweb-mode?
>> I would be happy to learn something about emacs solving this problem!
>>
>> Thanks for your help!
>> Emanuel
>>
>> here is the output of M-x describe-mode in the tex-region of a .Rnw:
>>
>> Enabled minor modes: Auto-Composition Auto-Compression Auto-Encryption
>> Column-Number Diff-Auto-Refine File-Name-Shadow
>> Global-Auto-Composition Global-Font-Lock Global-Highlight-Parentheses
>> Highlight-Parentheses Line-Number Noweb Noweb-Font-Lock Reftex
>> Shell-Dirtrack Tooltip Transient-Mark
>>
>> (Information about these minor modes follows the major mode info.)
>>
>> LaTeX mode:
>> Major mode in AUCTeX for editing LaTeX files.
>> ...
>>
>> --
>> Emanuel Heitlinger
>>
>> University of Karlsruhe (IT)
>> Zoological Institute 1 Ecology/Parasitology
>> Kornblumenstr. 13
>> 76131 Karlsruhe
>> Germany
>> Telephone +49 (0)721-608 7654
>>
>> http://www.scienceblogs.de/alles-was-lebt/
>>
>> or
>> University of Edinburgh
>> Institute of Evolutionary Biology
>> Kings Buildings, Ashworth Laboratories, West Mains Road
>> Edinburgh EH9 3JT
>> Scotland, UK
>> Telephone:+44 (0)131-650 6761
>>
>> ______________________________________________
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>>
>
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