MethodDefinition-class {methods} | R Documentation |
These classes extend the basic class "function"
when
functions are to be stored and used as method definitions.
Method definition objects are functions with additional information
defining how the function is being used as a method. The
target
slot is the class signature for which the method will
be dispatched, and the defined
slot the signature for which
the method was orignally specified (that is, the one that appeared
in some call to setMethod
).
The action of setting a method by a call to setMethod
creates an object of this class. It's
unwise to create them directly.
The class "SealedMethodDefinition"
is created by a call to
setMethod
with argument sealed = TRUE
. It has
the same representation as "MethodDefinition"
.
.Data
:"function"
; the data
part of the definition. target
:"signature"
; the
signature for which the method was wanted. defined
:"signature"
; the
signature for which a method was found. If the method was
inherited, this will not be identical to target
.
Class "function"
, from data part.
Class "PossibleMethod"
, directly.
Class "OptionalMethods"
, by class "function"
.
class MethodsList-class
for the objects
defining sets of methods associated with a particular generic
function. The individual method definitions stored in these objects
are from class MethodDefinition
, or an extension.
MethodWithNext-class
for an extension used by
callNextMethod
.