OK. Based on comments in serialize.c, this sort of thing isn't available(yet). However, I also came to the conclusion that for my purposes (caching functions-of existing R objects) I might implement the cache not with an environment but with the weak-reference facility exposed in the C interfaces.
Thanks to those who replied! Peter [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel