* lisp/emacs-lisp/advice.el (ad-preactivate-advice): Adjust the cleanup to

the use of nadvice.el.
* lisp/emacs-lisp/nadvice.el (advice--tweak): Make it possible for `tweak'
to return an explicit nil.
(advice--remove-function): Change accordingly.
* test/automated/advice-tests.el: Split up.  Add advice-test-preactivate.

5 files changed, 127 insertions, 105 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 56770098b43..f324ebbad51 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,5 +1,12 @@
 2013-01-15  Stefan Monnier  <monnier@iro.umontreal.ca>
 
+        * emacs-lisp/nadvice.el (advice--tweak): Make it possible for `tweak'
+        to return an explicit nil.
+        (advice--remove-function): Change accordingly.
+
+        * emacs-lisp/advice.el (ad-preactivate-advice): Adjust the cleanup to
+        the use of nadvice.el.
+
         * progmodes/which-func.el (which-function): Silence imenu errors
         (bug#13433).
 
diff --git a/lisp/emacs-lisp/advice.el b/lisp/emacs-lisp/advice.el
index 07340f06a13..3d03e894534 100644
--- a/lisp/emacs-lisp/advice.el
+++ b/lisp/emacs-lisp/advice.el
@@ -2866,10 +2866,8 @@ advised definition from scratch."
 
 (defun ad-preactivate-advice (function advice class position)
   "Preactivate FUNCTION and returns the constructed cache."
-  (let* ((function-defined-p (fboundp function))
-         (old-definition
-          (if function-defined-p
-              (symbol-function function)))
+  (let* ((advicefunname (ad-get-advice-info-field function 'advicefunname))
+         (old-advice (symbol-function advicefunname))
          (old-advice-info (ad-copy-advice-info function))
          (ad-advised-functions ad-advised-functions))
     (unwind-protect
@@ -2883,10 +2881,9 @@ advised definition from scratch."
               (list (ad-get-cache-definition function)
                     (ad-get-cache-id function))))
       (ad-set-advice-info function old-advice-info)
-      ;; Don't `fset' function to nil if it was previously unbound:
-      (if function-defined-p
-          (fset function old-definition)
-        (fmakunbound function)))))
+      (advice-remove function advicefunname)
+      (fset advicefunname old-advice)
+      (if old-advice (advice-add function :around advicefunname)))))
 
 
 ;; @@ Activation and definition handling:
diff --git a/lisp/emacs-lisp/nadvice.el b/lisp/emacs-lisp/nadvice.el
index 1715763d482..b0711fed26c 100644
--- a/lisp/emacs-lisp/nadvice.el
+++ b/lisp/emacs-lisp/nadvice.el
@@ -173,20 +173,21 @@ WHERE is a symbol to select an entry in `advice--where-alist'."
     (let ((first (advice--car flist))
           (rest (advice--cdr flist))
           (props (advice--props flist)))
-      (or (funcall tweaker first rest props)
+      (let ((val (funcall tweaker first rest props)))
+        (if val (car val)
           (let ((nrest (advice--tweak rest tweaker)))
             (if (eq rest nrest) flist
               (advice--make-1 (aref flist 1) (aref flist 3)
-                              first nrest props)))))))
+                              first nrest props))))))))
 
 ;;;###autoload
 (defun advice--remove-function (flist function)
   (advice--tweak flist
                  (lambda (first rest props)
-                   (if (or (not first)
-                           (equal function first)
+                   (cond ((not first) rest)
+                         ((or (equal function first)
                            (equal function (cdr (assq 'name props))))
-                       rest))))
+                          (list rest))))))
 
 (defvar advice--buffer-local-function-sample nil)
 
diff --git a/test/ChangeLog b/test/ChangeLog
index 472a6073884..7857000ba2f 100644
--- a/test/ChangeLog
+++ b/test/ChangeLog
@@ -1,3 +1,7 @@
+2013-01-15  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+        * automated/advice-tests.el: Split up.  Add advice-test-preactivate.
+
 2013-01-14  Glenn Morris  <rgm@gnu.org>
 
         * automated/compile-tests.el (compile-tests--test-regexps-data):
diff --git a/test/automated/advice-tests.el b/test/automated/advice-tests.el
index 238561bef84..8beaea64cd9 100644
--- a/test/automated/advice-tests.el
+++ b/test/automated/advice-tests.el
@@ -21,99 +21,112 @@
 
 ;;; Code:
 
-(ert-deftest advice-tests ()
+(ert-deftest advice-tests-nadvice ()
+  "Test nadvice code."
+  (defun sm-test1 (x) (+ x 4))
+  (should (equal (sm-test1 6) 10))
+  (advice-add 'sm-test1 :around (lambda (f y) (* (funcall f y) 5)))
+  (should (equal (sm-test1 6) 50))
+  (defun sm-test1 (x) (+ x 14))
+  (should (equal (sm-test1 6) 100))
+  (should (equal (null (get 'sm-test1 'defalias-fset-function)) nil))
+  (advice-remove 'sm-test1 (lambda (f y) (* (funcall f y) 5)))
+  (should (equal (sm-test1 6) 20))
+  (should (equal (get 'sm-test1 'defalias-fset-function) nil))
+
+  (advice-add 'sm-test3 :around
+              (lambda (f &rest args) `(toto ,(apply f args)))
+              '((name . wrap-with-toto)))
+  (defmacro sm-test3 (x) `(call-test3 ,x))
+  (should (equal (macroexpand '(sm-test3 56)) '(toto (call-test3 56)))))
+
+(ert-deftest advice-tests-advice ()
   "Test advice code."
-  (with-temp-buffer
-    (defun sm-test1 (x) (+ x 4))
-    (should (equal (sm-test1 6) 10))
-    (advice-add 'sm-test1 :around (lambda (f y) (* (funcall f y) 5)))
-    (should (equal (sm-test1 6) 50))
-    (defun sm-test1 (x) (+ x 14))
-    (should (equal (sm-test1 6) 100))
-    (should (equal (null (get 'sm-test1 'defalias-fset-function)) nil))
-    (advice-remove 'sm-test1 (lambda (f y) (* (funcall f y) 5)))
-    (should (equal (sm-test1 6) 20))
-    (should (equal (null (get 'sm-test1 'defalias-fset-function)) t))
-
-    (defun sm-test2 (x) (+ x 4))
-    (should (equal (sm-test2 6) 10))
-    (defadvice sm-test2 (around sm-test activate)
-       ad-do-it (setq ad-return-value (* ad-return-value 5)))
-    (should (equal (sm-test2 6) 50))
-    (ad-deactivate 'sm-test2)
-    (should (equal (sm-test2 6) 10))
-    (ad-activate 'sm-test2)
-    (should (equal (sm-test2 6) 50))
-    (defun sm-test2 (x) (+ x 14))
-    (should (equal (sm-test2 6) 100))
-    (should (equal (null (get 'sm-test2 'defalias-fset-function)) nil))
-    (ad-remove-advice 'sm-test2 'around 'sm-test)
-    (should (equal (sm-test2 6) 100))
-    (ad-activate 'sm-test2)
-    (should (equal (sm-test2 6) 20))
-    (should (equal (null (get 'sm-test2 'defalias-fset-function)) t))
-
-    (advice-add 'sm-test3 :around
-                 (lambda (f &rest args) `(toto ,(apply f args)))
-                 '((name . wrap-with-toto)))
-     (defmacro sm-test3 (x) `(call-test3 ,x))
-    (should (equal (macroexpand '(sm-test3 56)) '(toto (call-test3 56))))
-
-    (defadvice sm-test4 (around wrap-with-toto activate)
-       ad-do-it (setq ad-return-value `(toto ,ad-return-value)))
-     (defmacro sm-test4 (x) `(call-test4 ,x))
-    (should (equal (macroexpand '(sm-test4 56)) '(toto (call-test4 56))))
-    (defmacro sm-test4 (x) `(call-testq ,x))
-    (should (equal (macroexpand '(sm-test4 56)) '(toto (call-testq 56))))
-
-    ;; Combining old style and new style advices.
-    (defun sm-test5 (x) (+ x 4))
-    (should (equal (sm-test5 6) 10))
-    (advice-add 'sm-test5 :around (lambda (f y) (* (funcall f y) 5)))
-    (should (equal (sm-test5 6) 50))
-    (defadvice sm-test5 (around test activate)
-       ad-do-it (setq ad-return-value (+ ad-return-value 0.1)))
-    (should (equal (sm-test5 5) 45.1))
-    (ad-deactivate 'sm-test5)
-    (should (equal (sm-test5 6) 50))
-    (ad-activate 'sm-test5)
-    (should (equal (sm-test5 6) 50.1))
-    (defun sm-test5 (x) (+ x 14))
-    (should (equal (sm-test5 6) 100.1))
-    (advice-remove 'sm-test5 (lambda (f y) (* (funcall f y) 5)))
-    (should (equal (sm-test5 6) 20.1))
-
-    ;; This used to signal an error (bug#12858).
-    (autoload 'sm-test6 "foo")
-     (defadvice sm-test6 (around test activate)
-       ad-do-it)
-
-    ;; Check interaction between advice and called-interactively-p.
-    (defun sm-test7 (&optional x) (interactive) (+ (or x 7) 4))
-    (advice-add 'sm-test7 :around
-                (lambda (f &rest args)
-                  (list (cons 1 (called-interactively-p)) (apply f args))))
-    (should (equal (sm-test7) '((1 . nil) 11)))
-    (should (equal (call-interactively 'sm-test7) '((1 . t) 11)))
-    (let ((smi 7))
-      (advice-add 'sm-test7 :before
-                  (lambda (&rest args)
-                    (setq smi (called-interactively-p))))
-      (should (equal (list (sm-test7) smi)
-                     '(((1 . nil) 11) nil)))
-      (should (equal (list (call-interactively 'sm-test7) smi)
-                      '(((1 . t) 11) t))))
-    (advice-add 'sm-test7 :around
-                (lambda (f &rest args)
-                  (cons (cons 2 (called-interactively-p)) (apply f args))))
-    (should (equal (call-interactively 'sm-test7) '((2 . t) (1 . t) 11)))
-
-    ;; Check handling of interactive spec.
-    (defun sm-test8 (a) (interactive "p") a)
-    (defadvice sm-test8 (before adv1 activate) nil)
-    (defadvice sm-test8 (before adv2 activate) (interactive "P") nil)
-    (should (equal (interactive-form 'sm-test8) '(interactive "P")))
-    ))
+  (defun sm-test2 (x) (+ x 4))
+  (should (equal (sm-test2 6) 10))
+  (defadvice sm-test2 (around sm-test activate)
+    ad-do-it (setq ad-return-value (* ad-return-value 5)))
+  (should (equal (sm-test2 6) 50))
+  (ad-deactivate 'sm-test2)
+  (should (equal (sm-test2 6) 10))
+  (ad-activate 'sm-test2)
+  (should (equal (sm-test2 6) 50))
+  (defun sm-test2 (x) (+ x 14))
+  (should (equal (sm-test2 6) 100))
+  (should (equal (null (get 'sm-test2 'defalias-fset-function)) nil))
+  (ad-remove-advice 'sm-test2 'around 'sm-test)
+  (should (equal (sm-test2 6) 100))
+  (ad-activate 'sm-test2)
+  (should (equal (sm-test2 6) 20))
+  (should (equal (null (get 'sm-test2 'defalias-fset-function)) t))
+
+  (defadvice sm-test4 (around wrap-with-toto activate)
+    ad-do-it (setq ad-return-value `(toto ,ad-return-value)))
+  (defmacro sm-test4 (x) `(call-test4 ,x))
+  (should (equal (macroexpand '(sm-test4 56)) '(toto (call-test4 56))))
+  (defmacro sm-test4 (x) `(call-testq ,x))
+  (should (equal (macroexpand '(sm-test4 56)) '(toto (call-testq 56))))
+
+  ;; This used to signal an error (bug#12858).
+  (autoload 'sm-test6 "foo")
+  (defadvice sm-test6 (around test activate)
+    ad-do-it))
+
+(ert-deftest advice-tests-combination ()
+  "Combining old style and new style advices."
+  (defun sm-test5 (x) (+ x 4))
+  (should (equal (sm-test5 6) 10))
+  (advice-add 'sm-test5 :around (lambda (f y) (* (funcall f y) 5)))
+  (should (equal (sm-test5 6) 50))
+  (defadvice sm-test5 (around test activate)
+    ad-do-it (setq ad-return-value (+ ad-return-value 0.1)))
+  (should (equal (sm-test5 5) 45.1))
+  (ad-deactivate 'sm-test5)
+  (should (equal (sm-test5 6) 50))
+  (ad-activate 'sm-test5)
+  (should (equal (sm-test5 6) 50.1))
+  (defun sm-test5 (x) (+ x 14))
+  (should (equal (sm-test5 6) 100.1))
+  (advice-remove 'sm-test5 (lambda (f y) (* (funcall f y) 5)))
+  (should (equal (sm-test5 6) 20.1)))
+
+(ert-deftest advice-test-called-interactively-p ()
+  "Check interaction between advice and called-interactively-p."
+  (defun sm-test7 (&optional x) (interactive) (+ (or x 7) 4))
+  (advice-add 'sm-test7 :around
+              (lambda (f &rest args)
+                (list (cons 1 (called-interactively-p)) (apply f args))))
+  (should (equal (sm-test7) '((1 . nil) 11)))
+  (should (equal (call-interactively 'sm-test7) '((1 . t) 11)))
+  (let ((smi 7))
+    (advice-add 'sm-test7 :before
+                (lambda (&rest args)
+                  (setq smi (called-interactively-p))))
+    (should (equal (list (sm-test7) smi)
+                   '(((1 . nil) 11) nil)))
+    (should (equal (list (call-interactively 'sm-test7) smi)
+                   '(((1 . t) 11) t))))
+  (advice-add 'sm-test7 :around
+              (lambda (f &rest args)
+                (cons (cons 2 (called-interactively-p)) (apply f args))))
+  (should (equal (call-interactively 'sm-test7) '((2 . t) (1 . t) 11))))
+
+(ert-deftest advice-test-interactive ()
+  "Check handling of interactive spec."
+  (defun sm-test8 (a) (interactive "p") a)
+  (defadvice sm-test8 (before adv1 activate) nil)
+  (defadvice sm-test8 (before adv2 activate) (interactive "P") nil)
+  (should (equal (interactive-form 'sm-test8) '(interactive "P"))))
+
+(ert-deftest advice-test-preactivate ()
+  (should (equal (null (get 'sm-test9 'defalias-fset-function)) t))
+  (defun sm-test9 (a) (interactive "p") a)
+  (should (equal (null (get 'sm-test9 'defalias-fset-function)) t))
+  (defadvice sm-test9 (before adv1 pre act protect compile) nil)
+  (should (equal (null (get 'sm-test9 'defalias-fset-function)) nil))
+  (defadvice sm-test9 (before adv2 pre act protect compile)
+    (interactive "P") nil)
+  (should (equal (interactive-form 'sm-test9) '(interactive "P"))))
 
 ;; Local Variables:
 ;; no-byte-compile: t