S4 Classes Used Internally During Method Selection

Description

Objects from class "EmptyMethodsList" are generated during method selection to indicate failed search (forcing backtracking). Other classes described here are used internally in method dispatch. All these are for internal use.

Usage

## class described below
"EmptyMethodsList" # deprecated, since \R 3.2.0; rather "defunct" from 4.5.0

### Other, virtual classes used in method dispatch
"standardGeneric"
"standardGenericWithTrace"
"nonstandardGeneric"
"nonstandardGenericFunction"
"nonstandardGroupGenericFunction"
"OptionalFunction"
"optionalMethod"
"PossibleMethod"
"derivedDefaultMethod"
"internalDispatchMethod"

Extends / Slots

"EmptyMethodsList":

argument:

Object of class "name" the argument names being selected on.

sublist:

Object of class "list" (unused, and perhaps to be dropped in a later version.)

"optionalMethod" and "PossibleMethod" have no slots and extend S4 class "function".

Methods

No methods defined with class "EmptyMethodsList" in the signature.

See Also

Function MethodsListSelect (deprecated since R version 3.2.0) uses the objects; class MethodsList is formally defunct since R 3.2.0.