These classes are for specifying a test on the type of an object
using the class of that object and comparing it to target class
names. The tests can be either for
x inherits from class name (or
x is an instance of class name (i.e.
The first of these is represented by
and the second by
Objects can be created for the non-virtual classes
new("StrictIsTypeTest",...) or the convenience functions
Additionally, where appropriate,
a character vector is coerced to
Object of class
This is an internal data type to represent the class names.
It is not to be used directly. It is inherited from the
"character", from data part.
"vector", by class
signature(from = "character", to =
converts a character vector into a
Duncan Temple Lang <[email protected]>
1 2 3 4 5 6 7 8
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.