check warning with .onLoad() and setClass()

Dirk Eddelbuettel <edd at debian.org> writes:

On 4 October 2013 at 14:15, Rainer M Krug wrote:
| Hm. loadModule is Rcpp function, but I am only interested in using the
| setClass() function, which has nothing to do with Rcpp. I don't even use
| Rcpp in the package, only in one which is imported.

Sorry, assumed Reference Class created via Modules. My bad, and never mind.

But as John said, .onLoad() can be replaces since he made those changes in R
(and also in Rcpp). See ?setLoadAction, evalOnLoad(), ...

Ok - theat far I folow you. But how do I implement this?

I have now the following .onLoad() function:

,----
| .onLoad <- function(libname, pkgname) {
|     setClass(
|         "inDrak",
|         representation(
|             init = "SpatialGridDataFrame"
|             ),
|         contains = "simObj"
|         )
| }
`----

in the file ./R/onLoad.R in my package.

Now how can I now use the setLoadFunction()? I tried to simply put the
setClass in the setLoadFunction() as follow into the ./R/onLoad.R file:

,----
| setLoadFunction( function(libname, pkgname) {
|     setClass(
|         "inDrak",
|         representation(
|             init = "SpatialGridDataFrame"
|             ),
|         contains = "simObj"
|         )
| }
`----

but this did not work. 

So what do I have to do with it? I only find very few examples using
setLoadFunction().

Rainer

Dirk

-- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

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