Re: with-wrapper-hook is obsolete; how to replace it?

[Paul Eggert <eggert@cs.ucla.edu>]

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On 05/15/2016 11:43 AM, Stefan Monnier wrote:
> I don't think you can do it in a backward-compatible way.
> Which is why buffer-substring--filter still uses with-wrapper-hook (but
> only to implement the obsolete filter-buffer-substring-functions variable).

OK, thanks, how about the attached patch instead? The idea is to pacify 
the byte compiler without attempting to use add-function, by creating an 
internal-use-only version of the obsolete macro, a version that does not 
generate the warnings.


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diff --git a/lisp/abbrev.el b/lisp/abbrev.el
index 7814ea2..163dc8e 100644
--- a/lisp/abbrev.el
+++ b/lisp/abbrev.el
@@ -848,7 +848,7 @@ abbrev--default-expand
   "Default function to use for `abbrev-expand-function'.
 This respects the wrapper hook `abbrev-expand-functions'.
 Calls `abbrev-insert' to insert any expansion, and returns what it does."
-  (with-wrapper-hook abbrev-expand-functions ()
+  (subr--with-wrapper-hook-no-warnings abbrev-expand-functions ()
     (pcase-let ((`(,sym ,name ,wordstart ,wordend) (abbrev--before-point)))
       (when sym
         (let ((startpos (copy-marker (point) t))
diff --git a/lisp/minibuffer.el b/lisp/minibuffer.el
index 1ee05d3..9190c1f 100644
--- a/lisp/minibuffer.el
+++ b/lisp/minibuffer.el
@@ -1970,7 +1970,7 @@ completion--in-region
   "Default function to use for `completion-in-region-function'.
 Its arguments and return value are as specified for `completion-in-region'.
 This respects the wrapper hook `completion-in-region-functions'."
-  (with-wrapper-hook
+  (subr--with-wrapper-hook-no-warnings
       ;; FIXME: Maybe we should use this hook to provide a "display
       ;; completions" operation as well.
       completion-in-region-functions (start end collection predicate)
diff --git a/lisp/simple.el b/lisp/simple.el
index e257062..65664c9 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -4061,7 +4061,8 @@ buffer-substring--filter
 This respects the wrapper hook `filter-buffer-substring-functions',
 and the abnormal hook `buffer-substring-filters'.
 No filtering is done unless a hook says to."
-  (with-wrapper-hook filter-buffer-substring-functions (beg end delete)
+  (subr--with-wrapper-hook-no-warnings
+    filter-buffer-substring-functions (beg end delete)
     (cond
      ((or delete buffer-substring-filters)
       (save-excursion
diff --git a/lisp/subr.el b/lisp/subr.el
index 0fa6404..438f00a 100644
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -1546,6 +1546,10 @@ with-wrapper-hook
   (declare (indent 2) (debug (form sexp body))
            (obsolete "use a <foo>-function variable modified by `add-function'."
                      "24.4"))
+  `(subr--with-wrapper-hook-no-warnings ,hook ,args ,@body))
+
+(defmacro subr--with-wrapper-hook-no-warnings (hook args &rest body)
+  "Like (with-wrapper-hook HOOK ARGS BODY), but without warnings."
   ;; We need those two gensyms because CL's lexical scoping is not available
   ;; for function arguments :-(
   (let ((funs (make-symbol "funs"))