EIEIO&cl-generic: Add obsolescence warnings and fix corner case

* lisp/emacs-lisp/cl-generic.el (cl-generic-define-method): Correctly handle
introduction of a new dispatch argument.
(cl--generic-cache-miss): Handle dispatch on an argument which was not
considered as dispatchable for this method.
(cl-defmethod): Warn when adding a method to an obsolete generic function.
(cl--generic-lambda): Make sure it works if cl-lib is not yet loaded.

* lisp/emacs-lisp/eieio-generic.el (eieio--defgeneric-init-form):
Use autoloadp.

* lisp/emacs-lisp/eieio.el (defclass): Add obsolescence warning for the
`newname' argument.

* test/automated/cl-generic-tests.el (cl-generic-test-10-weird): New test.
Rename other tests to preserve ordering.

1 files changed, 2 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index be283bbc1c3..4551c9c6b79 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -203,6 +203,8 @@ the old behavior -- *shell* buffer displays in current window -- use
 
 ** EIEIO
 *** The `:protection' slot option is not obeyed any more.
+*** The `newname' argument to constructors is optional&deprecated.
+If you need your objects to be named, do it by inheriting from `eieio-named'.
 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
 *** The <class> variables are declared obsolete.
 *** The <initarg> variables are declared obsolete.