[ESS] noweb file and assignment key

[Martin Maechler]

>>>>> "RM" == Richard Morrisroe <richie.morrisroe at gmail.com>
>>>>>     on Tue, 30 Oct 2012 20:57:32 +0000 writes:

    RM> Hi All, While attempting to avoid real work, I appear to
    RM> have found a possible cause for this kind of error.

    RM> See the .Rnw file below.

now committed to the ESS development sources as
ess/etc/in-string-bug-ex.Rnw

    RM> Essentially, it appears that an apostrophe ' will
    RM> confuse ess-smart-underscore and it then believes that
    RM> it is in a string, 
    RM> where the normal behaviour does not occur.

exactly: You diagnosed perfectly.

    RM> Another apostrophe fixes the problem. I hope this proves
    RM> useful.

it does, thank you.

The bad news is that this bug is still in the ESS development
sources ... which I had wanted to release as  ESS 12.09-1
tomorrow.
Now this small nastyness is really something we (ESS core
developers) should address before release.

Martin Maechler, ETH Zurich


    RM> \documentclass{article}

    RM> \begin{document}

    RM> <<packages, echo=FALSE, results=hide>>=
    RM> i.can.haz.assginment <- TRUE @

    RM> Now, we will introduce an extraneous apostrophe, for no
    RM> reason '

    RM> <<test2>>= #ess-smart-underscore-no-longer-works @

    RM> ' <<test3, echo=TRUE, results=verbatim >>= nowitdoes <-
    RM> cat("Note the apostrophe above which closes the earlier
    RM> one\n") @

    RM> \end{document}

    RM> I have attempted to localise the problem more precisely,
    RM> but have not had much success.

    RM> ------------------------------



>>>>> Denis Haine <denis.haine at gmail.com>
>>>>>     on Mon, 29 Oct 2012 11:26:36 -0400 writes:

    >> Hello, After upgrading to emacs 24 (emacs 24.2.1, ess
    >> 12.09) I noticed the underscore key is not mapped anymore
    >> to the R/S assignment sign when into a Rnw buffer. The
    >> underscore key is still correctly giving the assignment
    >> sign when into a R buffer. How can I restore the usual
    >> underscore behavior in a noweb buffer?  Thanks for your
    >> help,

    > I'm pretty sure this was not a universal problem.  Our
    > group here uses ESS 12.09 (I'm using the development
    > version), and we use Sweave ( *.Rnw ) very very often.
    > Nobody has told me about such a problem.

    > Couldn't it be that it happens exactly in the situation
    > where The switch from R mode ("code chunk") to latex
    > mode ("text chunk") does not quite work... and we know
    > that happens not so infrequently.  But you can always
    > work around that by "re syncing" or sometimes easiest by
    > re-opening the *.Rnw file.

    > Martin

    >> Denis