[R-pkg-devel] S3 dispatch for select()

[Kirill Müller]

Hi


When a package defines a select() generic, objects of type list seem to 
be forcibly dispatched to utils::select.list(). This is not the case 
when the generic is defined in a regular R script. I could define a 
select__() generic and forward all select() calls to select__() first, 
but I wonder if there's a better way. Thanks.

Examples below, the first needs the *select* package [1].


Best regards

Kirill


[1] https://github.com/krlmlr/select


# 1. From package:

library(select)
select(letters)
#> [1] "select.default"
select(1:3)
#> [1] "select.default"
select(list(1:3))
#> Error in select.list(list(1:3)): select.list() cannot be used 
non-interactively


# 2. From script

select <- function(x, ...) UseMethod("select")

select.default <- function(x, ...) "select.default"

select.list <- function(x, ...) "select.list"

select(letters)
#> [1] "select.default"
select(1:3)
#> [1] "select.default"
select(list(1:3))
#> [1] "select.list"