Convert object to a box
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, ...)
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,
|
.x |
An R object. |
.p |
A predicate function. |
... |
Arguments passed to |
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