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.
I hope these changes don't introduce any bugs in old Rd files, but if
they do, please let me know and I'll fix them. (Not today; I'll be
travelling.)
Duncan Murdoch
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