Re: [Rd] Class generator functions for reference classes

From: John Chambers <jmc_at_r-project.org>
Date: Tue, 30 Oct 2012 14:09:05 -0700

A heads up for those using Rcpp and perhaps other packages related to reference classes.

The changes in 61035 cause a problem for classes defined with a slot using the return value of setRefClass(), notably for Rcpp. The name of that class changed.

Rather than introduce back-incompatibility, I will rename a couple of classes so the class name of the return value remains the same. (It's not as natural a naming scheme as what is in place, but not the first time back-compatibility has won out over preferred design.)

It will be a day or two before I can get to this, so don't panic if your package does not install from the current r-devel until then.

John

On 10/27/12 2:07 PM, John Chambers wrote:
> As of rev. 61035 in r-devel, setRefClass() now returns a generator
> function, as setClass() has done since 2.15.0.
>
> The convenient style is now:
> mEdit <- setRefClass("mEdit",......)
> xx <- mEdit(data = xMat)
>
> instead of
> xx <- mEdit$new(data = xMat)
>
> The returned object still has fields and methods accessible as before.
>
> See the "Value" and "Reference Class Generators" sections of
> ?ReferenceClasses for details.
>
> Thanks to Romain François for suggesting this.
>
> John
>
> ______________________________________________
> R-devel_at_r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel



R-devel_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel Received on Tue 30 Oct 2012 - 21:12:47 GMT

This quarter's messages: by month, or sorted: [ by date ] [ by thread ] [ by subject ] [ by author ]

All messages

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Wed 31 Oct 2012 - 22:10:50 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-devel. Please read the posting guide before posting to the list.

list of date sections of archive