Modules

[JohnCoene]

Proper isolated modules

[JohnCoene]

Can't make it work nicely with R packages I think: not without massive complexity

[JohnCoene]

Follow directory structure. Export #export functions, otherwise internal

modules/
------ module

module <- local({
  exported <- new.env(parent = emptyenv())

  internal <- 42L

  exported$foo <- function() {
    internal
  }

  exported
})

modules/
------ module/
--------- submodule

Where submodules are expanded to

module <- local({
  exported <- new.env(parent = emptyenv())

  internal <- 42L

  exported$foo <- function() {
    internal
  }

  exported$submodule <- local({
    exported <- new.env(parent = emptyenv())

    internal <- 69L

    exported$bar <- function() {
      internal
    }

    exported
  })

  exported
})

[JohnCoene]

No import needed, we assume we work with R packages

[JohnCoene]

I'd rather we put #module name at the top of every file, as done in Go for instance, but then the "transpiled" code needs to combine multiple input files into one which may change the order, it's probably OK?