Convert object to a box

Source: R/s3.R

  • as_box() boxes its input only if it is not already a box. The class is also checked if supplied.

  • as_box_if() boxes its input only if it not already a box, or if the predicate .p returns TRUE.

as_box(x, class = NULL)

as_box_if(.x, .p, .class = NULL, ...)

Arguments

x

An R object.
class, .class

A box class. If the input is already a box of that class, it is returned as is. If the input needs to be boxed, class is passed to new_box().
.x

An R object.
.p

A predicate function.
...

Arguments passed to .p.