Displaying 1 result from an estimated 1 matches for "obj_child".
2019 Aug 07
1
NextMethod() and argument laziness
...e `child` method.
my_generic <- function(x, cols) {
UseMethod("my_generic")
}
my_generic.parent <- function(x, cols) {
substitute(cols)
}
my_generic.child <- function(x, cols) {
NextMethod()
}
obj_parent <- structure(mtcars, class = c("parent", class(mtcars)))
obj_child <- structure(obj_parent, class = c("child", class(obj_parent)))
my_generic(obj_parent, mpg)
#> mpg
my_generic(obj_child, mpg)
#> cols
Thanks,
Davis
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