autocomplete for Class$new() parameters.

[dfalbel]

It would be great to have autocomplete for the initialize method.

R6 <- R6Class("R6",
  public = list(
    x = NULL,
    initialize = function(x = 1) self$x <- x,
    getx = function() self$x,
    inc = function(n = 1) self$x <- x + n
  )
)

In this example R6$new() autocompletes with ..., it would be nice to show x.

[hadley]

This would be fairly easy to do if you don't mind an rlang dep, but not too hard to do without it.

[wch]

I'd prefer to keep R6 dependency-free, especially if the dependency package requires compilation.

[wch]

FWIW, I just learned that the RStudio IDE has had autocomplete support for $new() for some time now. https://github.com/rstudio/rstudio/blob/2a9eaa49/src/cpp/session/modules/SessionRCompletions.R#L654-L658