These options will be used on arrays. Note that arrays can be built on top of
vectors, lists or expressions. Canonical arrays have an implicit class "array"
shown by class()
but "array" is not part of the class attribute.
opts_array(constructor = c("array", "next"), ...)
An object of class <constructive_options/constructive_options_array>
String. Name of the function used to construct the object, see Details section.
Additional options used by user defined constructors through the opts
object
Depending on constructor
, we construct the object as follows: