Hi! I'm trying to create a persistent memoising class with a destructor and an option to evaluate cache misses in parallel. I want to lock all its fields because it doesn't make sense to change them after the filename, the environment object and the function are set in the object. (I'm not sure whether I should lock the environment field I use as the hash, though.)
The problem is, I can't figure out how to use class$lock(...) properly: > test.class <- setRefClass("test", fields=c("field")) > test.class$lock("field") Error in .makeDefaultBinding(current@field, current@className, TRUE, environment(current)) : use of NULL environment is defunct By looking at traceback() and source of methods:::.lockRefFields, I see that environment(zzz@generator$def@fieldPrototypes[["field"]]) is, indeed, NULL. I'm using R version 3.3.3 (2017-03-06), version$`svn rev` is "72310". What am I doing wring? -- Best regards, Ivan P.S. Please Cc me in your replies to the list, if possible. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.