[Rd] Changes to Rd handling in R-devel

[hadley wickham]

On Fri, Jun 19, 2009 at 6:12 PM, Duncan Murdoch<murdoch at stats.uwo.ca> wrote:
> I've just committed some fairly big changes to R-devel.  - There's a new tag
> \Sexpr which allows R code to be embedded within the Rd file, similar to
> Sweave,  \RdOpts
>   corresponds to \SweaveOpts.
>  - The parser now mainly issues warnings, rather than errors, in case of
> syntax errors.  It throws away a few tokens and tries to restart.  This
> should let you see most of your errors in one pass, rather than one at a
> time.  (Don't ignore the warnings -- you've lost some of your file if you
> get them!)  (Romain:  yes, this is done using the special "error" token in
> bison.)
>  - There are also a number of bug fixes to the rendering code (e.g.
> Rd2HTML).  I'm hoping to switch over soon to the new parser being used to
> produce all man pages.
>
> I need to write up more about \Sexpr, but the basic idea is that the format
> is
>
> \Sexpr{R code}
>
> or
>
> \Sexpr[options]{R code}
>
> Currently the R code is not executed unless you do it manually, but once
> we're using this engine for man pages, you'll be able to choose when to
> execute the code:  build time, install time, or render time.

Can the R code emit top-level rdoc tags? i.e. could the complete rd
file just be \Sexpr{} ?

Hadley


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