[Rd] Warning on backslash sequences (was sprintf behavior)

Prof Brian Ripley ripley at stats.ox.ac.uk
Thu Sep 28 17:28:14 CEST 2006

On Thu, 28 Sep 2006, Peter Dalgaard wrote:

> "Gabor Grothendieck" <ggrothendieck at gmail.com> writes:
>> That's a good idea for the case I mentioned although there is still
>> the case where one requires a single quoted string (maybe for
>> generating code for some other language) and that is
>> not handled by deparse.
> Yes, but there be devils lurking in there. I think you do in general
> need to know what the other language is. Take a look at shQuote(), for
> instance. (Why, BTW, does that not simply "escape" single quotes using
> '"'"' instead of switching to double-quotes and escaping everything in
> sight?)

I suspect because the references consulted suggested that was not 
portable.  Since 'sh' covers many variants (at least Bourne sh, ash, bash, 
ksh, zsh) it is hard to get definitive answers.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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