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Is there a way to pass a modified argument from an S3 generic to a method? Here's a non-working example that I want to return "abcd". test <- function(x, y = NULL){ y <- "abcd" UseMethod("test") } test.default <- function(x, y = NULL) y test(x = 3) Is that possible? I've looked around a lot, but can't find any examples or

Hi Gabriel, Thanks for your answer and future update plan. Somehow this email has been delayed for a week, so there might be a wired reply from me saying that I have found the answer from the R source code, it was sent from me last week. Hopefully, this reply will not cost another week to post:) As a side note, I like the idea that defining a macro for sortedness, and I can see why we can only