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
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