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Doc and manual updates for cl-letf and letf

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Fixes: debbugs:12760

* doc/misc/cl.texi (Modify Macros): Update for cl-letf changes.
(Obsolete Lexical Macros): Say a little more about letf/cl-letf.

* lisp/emacs-lisp/cl.el (letf): Doc fix. 

* etc/NEWS: Related edit.
This commit is contained in:
Glenn Morris 2012-10-30 00:34:37 -07:00
parent ce69a8443a
commit 4ddedf94c8
5 changed files with 52 additions and 23 deletions
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4
lisp/emacs-lisp/cl.el
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@ -511,7 +511,9 @@ rather than relying on `lexical-binding'."
(defmacro letf (bindings &rest body)
"Dynamically scoped let-style bindings for places.
Like `cl-letf', but with some extra backward compatibility."
For more details, see `cl-letf'. This macro behaves like that one
in almost every respect (apart from details that relate to some
deprecated usage of `symbol-function' in place forms)." ; bug#12760
(declare (indent 1) (debug cl-letf))
;; Like cl-letf, but with special handling of symbol-function.
`(cl-letf ,(mapcar (lambda (x) (if (eq (car-safe (car x)) 'symbol-function)