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99 flavor:compose-handler-source
flavor: compose-handler-source generic flavor-name &key env Function
Finds the methods that handle the specified generic operation on instances
of the flavor specified by flavor-name, and finds the source code of the combined
method (if any). Seven values are returned:
form
A Lisp form which is the body of the combined method.
If there isn't actually a combined method, this is nil.
handler-function-spec
The name of the handler, which can be a combined
method, a single method, or an instance-variable accessor.
combined-method-list
A list of function specs of all the methods called,. in order
of execution; the order is approximate because of
wrappers.
wrapper-sources Information that the combined method requires so that
Flavors knows when it needs to be recompiled.
lambda-list A list describing what the arguments of the combined
method should be (not including the three interal arguments
automatically given to all methods).
method-combination
error
A list of the method combination type and parameters to
it.
nil normally, otherwise a string describing an error that
occurred.
flavor:compose-handler-source is generally slower than
flavor: compose-handler, since the latter function can usually take advantage
of pre-computed information present in virtual memory.
The env parameter to flavor:compose-handler and
flavor:compose-handler-source can be used to insert hypotheses into their
computations. If env is nil, the generics, flavors, and methods in the running
world are used. env can be an alist of modifications to the running
world; each element takes the form:
(name flavor-structure generic-structure (method definition) ... )
Everything except name can be nil. name is the name of a generic, or a
flavor, or both. flavor-structure is nil or the internal structure that
describes the flavor. generic-structure is nil or the internal structure that
describes the generic function. The remaining elements of an alist element
refer to methods of the flavor named name; method is a function spec and
definition is nil if that method is to be ignored, t if the method is to be assumed
to exist, or the actual definition (expander function) in the case of a
wrapper.
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