method {S7} | R Documentation |
Retrieve a method for an S7 generic
Description
method()
takes a generic and signature and retrieves the corresponding
method. This is rarely needed because most of the time you'll rely on the
the generic, via S7_dispatch()
, to find and call the method for you.
However, this introspection is useful if you want to see the implementation
of a specific method.
Usage
method(generic, class = NULL, object = NULL)
Arguments
generic |
A generic function, i.e. an S7 generic, an external generic, an S3 generic, or an S4 generic. |
class , object |
Perform introspection either with a |
Value
A function with class <S7_method>.
See Also
method_explain()
to explain why a specific method was picked.
Examples
# Create a generic and register some methods
bizarro <- new_generic("bizarro", "x")
method(bizarro, class_numeric) <- function(x) rev(x)
method(bizarro, new_S3_class("factor")) <- function(x) {
levels(x) <- rev(levels(x))
x
}
# Printing the generic shows the registered method
bizarro
# And you can use method() to inspect specific implementations
method(bizarro, class = class_integer)
method(bizarro, object = 1)
method(bizarro, new_S3_class("factor"))
[Package S7 version 0.1.1 Index]