* emacs-lisp/eieio.el (eieio-specialized-key-to-generic-key): New
function.
(eieio-defmethod, eieio-generic-form, eieio-generic-call): Use it.
(eieio-default-eval-maybe): Eval val instead of unquoting only.
(class-precedence-list): If class is nil, return nil.
(eieio-generic-call): If class of first input arg is nil, don't
look up static methods, and do check for primary methods.
(initialize-instance): See if the default needs to be evaluated
during the constructor.
(eieio-perform-slot-validation-for-default): Don't do the check
for values that will eventually be evaluated.
(eieio-eval-default-p): New function.
(eieio-default-eval-maybe): Use it.
* emacs-lisp/eieio.el (eieio-defclass): Allow :c3
method-invocation-order.
(eieio-c3-candidate, eieio-c3-merge-lists): New functions.
(eieio-class-precedence-dfs): Compute class precedence list using
dfs algorithm.
(eieio-class-precedence-bfs): Compute class precedence list using
bfs algorithm.
(eieio-class-precedence-c3): compute class precedence list using
c3 algorithm.
(class-precedence-list): New function.
(eieiomt-method-list, eieiomt-sym-optimize): Use it.
(inconsistent-class-hierarchy): New error symbol.
(call-next-method): Stow the replacement argument list for future
call-next-method invocations.
(eieio-defclass): Apply deftype handler and setf-method properties
directly.
(eieio-add-new-slot): Avoid union function from cl library.
(eieio--typep): New function.
(eieio-perform-slot-validation): Use it.
