Because "depends" is treated incorrectly (if I may place a value judgement on it). I had an earlier thread on this, not sure if any changes have taken place since then:
http://r.789695.n4.nabble.com/Dependencies-of-Imports-not-attached-td4666529.html On Mon, Feb 10, 2014 at 5:53 PM, Kirill Müller <kirill.muel...@ivt.baug.ethz.ch> wrote: > Hi > > > Accesses the $new method for a class defined in a package fails if the > methods package is not loaded. I have created a test package with the > following single code file: > > newTest <- function() { > cl <- get("someClass") > cl$new > } > > someClass <- setRefClass("someClass") > > (This is similar to code actually used in the testthat package.) > > If methods is not loaded, executing the newTest function fails in the > following scenarios: > > - Package "depends" on methods (scenario "depend") > - Package "imports" methods and imports either the setRefClass function > (scenario "import-setRefClass") or the whole package (scenario > "import-methods") > > It succeeds if the newTest function calls require(methods) (scenario > "require"). > > The script at https://raw2.github.com/krlmlr/methodsTest/master/test-all.sh > creates an empty user library in subdirectory r-lib of the current > directory, installs devtools, and tests the four scenarios by repeatedly > installing the corresponding version of the package and trying to execute > newTest() from Rscript. I have attached the output. The package itself is on > GitHub: https://github.com/krlmlr/methodsTest , there is a branch for each > scenario. > > Why does it seem to be necessary to load the methods package here? > > > Best regards > > Kirill > > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
