Re: [Rd] Improvement to documentation in dput.Rd

[Martin Maechler]

> Korpela Mikko (MML) 
> on Sat, 29 Sep 2018 06:49:25 + writes:

> If the "Matrix" package is attached, 'example(dget)'
> fails:
>> library(Matrix) example(dget)
  
dget> fil <- tempfile()
  
dget> ## Write an ASCII version of function mean to our temp
dget> file dput(mean, fil)

dget> ## And read it back into 'bar' bar <- dget(fil)
>   Error in initialize(value, ...) : '...' used in an
> incorrect context

> A possible fix would be to use 'dput(base::mean, fil)'
> instead of 'dput(mean, fil)' in
> src/library/base/man/dput.Rd .

> -- 
> Mikko Korpela

Thank you, Mikko,
indeed that's an improvement which I have done now (svn 75380).

-

In an ideal world the deparse()'ing  [equivalent: dput()] of S4
generics and methods would give an expression which is not only
parse()able -- which it is finely here -- but would also be
correct when eval()'ed subsequently.

So in this sense, one could also for a "bug" fix which would provide that.
OTOH we do say in the docs that parse() typically works as
inverse of deparse()  {and hence dget() as inverse of dput()}
but not always...

Martin

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[Rd] Query the pointer protection stack size (--max-ppsize=N) from within R?

[Henrik Bengtsson]

Hi,

for simply for troubleshooting purposes (e.g. making sure that
--max-ppsize=N) is set, is there a way to query the pointer protection
stack size from R?  I tried to grep the source code and couldn't find
anything, so I expect the answer is no.

Thxs,

Henrik

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