[R-pkg-devel] advice about errorCondition() function in the Rcmdr package

[Fox, John]

Dear Uwe,

> -----Original Message-----
> From: Uwe Ligges [mailto:ligges using statistik.tu-dortmund.de]
> Sent: Wednesday, May 15, 2019 7:51 AM
> To: Fox, John <jfox using mcmaster.ca>; R Package Development <r-package-
> devel using r-project.org>
> Subject: Re: [R-pkg-devel] advice about errorCondition() function in the Rcmdr
> package
> 
> Dear John,
> 
> I guess Rcmdr::errorCondition() will rarely be called by users

I think that here rarely == never!

> (nor
> base::errorCondition), hence it should be quite safe if other packages import
> correctly into their namespace and use the version their maintainers import?

Typically an Rcmdr plug-in package will import(Rcmdr) because it will use many functions exported by the Rcmdr package.

> 
>  From that point of view, there are no changes required in Rcmdr.

Ok -- thanks -- that makes sense.

Best,
 John

> 
> Best,
> Uwe
> 
> 
> 
> On 14.05.2019 16:28, Fox, John wrote:
> > Dear list members,
> >
> > I noticed that there's a name clash between errorCondition() in the Rcmdr
> package and the new function by the same name in the base package in R
> 3.6.0. errorCondition() has been in the Rcmdr package for many years and is
> used extensively -- literally dozens of times. It's exported because it's also
> used in Rcmdr plug-in packages. The function checks for errors, prints an error
> message, cleans up after the error, and restarts a dialog.
> >
> > For the time-being, I've renamed the function as ErrorCondition() (with an
> uppercase "E") in the development version of the Rcmdr package, to be
> released in late summer, but have retained and deprecated errorCondition()
> because I expect that removing it will break most or even all Rcmdr plug-in
> packages, but I also suspect that masking base::errorCondition() can be
> problematic.
> >
> > Can anyone suggest the best way to proceed?
> >
> > Best,
> >   John
> >
> > --------------------------------------
> > John Fox, Professor Emeritus
> > McMaster University
> > Hamilton, Ontario, Canada
> > Web: socialsciences.mcmaster.ca/jfox/
> >
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