cast<R> method
Returns a view of this list as a list of R
instances, if necessary.
If this list is already a List<R>
, it is returned unchanged.
If this list contains only instances of R
, all read operations
will work correctly. If any operation tries to access an element
that is not an instance of R
, the access will throw instead.
Elements added to the list (e.g., by using add or addAll)
must be instance of R
to be valid arguments to the adding function,
and they must be instances of E
as well to be accepted by
this list as well.
Implementation
List<R> cast<R>() {
List<Object> self = this;
return self is List<R> ? self : List.castFrom<E, R>(this);
}