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Un-obsolete 'string-to-unibyte'

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* lisp/subr.el (string-to-unibyte): No longer obsolete.  See the
emacs-devel discussion around this message:
http://lists.gnu.org/archive/html/emacs-devel/2018-05/msg00656.html.

* etc/NEWS: Announce the change.
This commit is contained in:
Eli Zaretskii 2018-06-02 13:04:15 +03:00
parent 9ac76456eb
commit 4a7e74fea6
2 changed files with 13 additions and 1 deletions
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7
etc/NEWS
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@ -670,6 +670,13 @@ loading messages if requested, and protects against recursive loads.
The history of variable names read by 'read-variable' is recorded in
the new variable 'custom-variable-history'.
---
** The function 'string-to-unibyte' is no longer declared obsolete.
We have found that there are legitimate use cases for this function,
where there's no better alternative. We believe that the incorrect
uses of this function all but disappeared by now, so we are
un-obsoleting it.
* Changes in Emacs 27.1 on Non-Free Operating Systems

7
lisp/subr.el
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@ -1438,8 +1438,13 @@ be a list of the form returned by `event-start' and `event-end'."
"27.1")
(make-obsolete 'invocation-name "use the variable of the same name." "27.1")
;; We used to declare string-to-unibyte obsolete, but it is a valid
;; way of getting a unibyte string that can be indexed by bytes, when
;; the original string has raw bytes in their internal multibyte
;; representation. This can be useful when one needs to examine
;; individual bytes at known offsets from the string beginning.
;; (make-obsolete 'string-to-unibyte "use `encode-coding-string'." "26.1")
;; bug#23850
(make-obsolete 'string-to-unibyte "use `encode-coding-string'." "26.1")
(make-obsolete 'string-as-unibyte "use `encode-coding-string'." "26.1")
(make-obsolete 'string-make-unibyte "use `encode-coding-string'." "26.1")
(make-obsolete 'string-to-multibyte "use `decode-coding-string'." "26.1")