isClass
Test for a Class
Description
Tests if the specified character string corresponds to a currently-defined class.
Usage
isClass(Class, formal = TRUE, where = topenv(parent.frame()))
Arguments
| Class |
a character string defining the class.
|
| formal |
this argument is unimplemented, and a warning is generated if it is given.
|
| where |
this argument is unimplemented, and a warning is generated if it is given.
|
Value
returns a logical value. If TRUE, Class corresponds to a currently-defined class.
See Also
Examples
isClass("numeric") # TRUE - this class is always defined
isClass("undefined-class") # FALSE