[R-pkg-devel] Do I need to namespace and import functions from 'methods' package?

[Dean Attali]

I see there have been several messages about this recently. I apologize, I
wasn't aware of the fact that I could search old messages on the board -
will do that next time, thanks

---
http://deanattali.com

On 12 July 2015 at 13:36, Duncan Murdoch <murdoch.duncan at gmail.com> wrote:

> On 12/07/2015 4:01 PM, Dean Attali wrote:
> > I have a package that is using the 'is' function from the 'methods'
> > package.  My package has been on CRAN for some time now and has had 3
> > different versions already. Yesterday when submitting, I got a response
> > with:
> >
> > * checking R code for possible problems ... NOTE
> >> ggMarginal: no visible global function definition for 'is'
> >> Undefined global functions or variables:
> >>   is
> >
> >
> > So I fixed it by changing 'is' to 'methods::is', and then I got a
> response
> >
> > * checking dependencies in R code ... WARNING
> >> '::' or ':::' import not declared from: ‘methods’
> >
> >
> > So I suppose I need to declare 'methods' in my imported packages.
> >
> > My question is: is this a new requirement, to explicitly import 'methods'
> > and namespace functions from it, or has it always been a requirement but
> I
> > just wasn't caught? Or is it not even a requirement and the R CMD check
> was
> > being weird?
> >
>
> It is a new requirement.  As Joshua Ulrich posted on Friday,
>
> > Yes, this is expected.  See:
> >
> http://developer.r-project.org/blosxom.cgi/R-devel/NEWS/2015/06/29#n2015-06-29
> >
> > And an earlier email on this list:
> > https://stat.ethz.ch/pipermail/r-package-devel/2015q2/000171.html
>
>
>

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