Fixes: debbugs:19645 * lisp/emacs-lisp/cl-generic.el (cl-defgeneric): Add support for `declare'. (cl--generic-setf-rewrite): Setup the setf expander right away. (cl-defmethod): Make sure the setf expander is setup before we expand the body. (cl-defmethod): Silence byte-compiler warnings. (cl-generic-define-method): Shuffle code to change return value. (cl--generic-method-info): New function, extracted from cl--generic-describe. (cl--generic-describe): Use it. * lisp/emacs-lisp/eieio-speedbar.el: * lisp/emacs-lisp/eieio-datadebug.el: * lisp/emacs-lisp/eieio-custom.el: * lisp/emacs-lisp/eieio-base.el: Use cl-defmethod. * lisp/emacs-lisp/eieio-compat.el (eieio--defmethod): Avoid no-next-method errors when there's a `before' but no `primary'. (next-method-p): Return nil rather than signal an error. (eieio-defgeneric): Remove bogus (fboundp 'method). * lisp/emacs-lisp/eieio-opt.el: Adapt to cl-generic. (eieio--specializers-apply-to-class-p): New function. (eieio-all-generic-functions): Use it. (eieio-method-documentation): Use it as well as cl--generic-method-info. Change format of return value. (eieio-help-class): Adapt accordingly. * lisp/emacs-lisp/eieio.el: Use cl-defmethod. (defclass): Generate cl-defmethod calls; use setf methods for :accessor. (eieio-object-name-string): Declare as obsolete. * test/automated/cl-generic-tests.el (setf cl--generic-2): Make sure the setf can be used already in the body of the method.