>>>>> Korpela Mikko (MML)
>>>>> on Sat, 29 Sep 2018 06:49:25 +0000 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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