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An operation object of the appropriate type is instantiated whenever the user wants to do something with a system like
Operations can be invoked directly, or examined to see what their effects would be without performing them. FIXME: document how! There are a bunch of methods specialised on operation and component type that actually do the grunt work.
The operation object contains whatever state is relevant for this purpose
(perhaps a list of visited nodes, for example)
but primarily is a nice thing to specialise operation methods on
and easier than having them all be EQL
methods.
Operations are invoked on systems via operate
.
operate
operation system &rest initargsoos
operation system &rest initargsoperate
invokes operation on system.
oos
is a synonym for operate
.
operation is a symbol that is passed, along with the supplied
initargs, to make-instance
to create the operation object.
system is a system designator.
The initargs are passed to the make-instance
call
when creating the operation object.
Note that dependencies may cause the operation
to invoke other operations on the system or its components:
the new operations will be created
with the same initargs as the original one.
• Predefined operations of ASDF: | ||
• Creating new operations: |
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