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; Improve documentation of with-restriction

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* lisp/subr.el (with-restriction):
* doc/lispref/positions.texi (Narrowing): Make it clear that the
argument is evaluated and that the result of the evaluation must
not be nil.
This commit is contained in:
Gregory Heytings 2023-07-09 19:27:12 +00:00
parent be34e8294a
commit 419b4d4491
2 changed files with 9 additions and 9 deletions
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3
doc/lispref/positions.texi
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@ -1169,7 +1169,8 @@ saved bounds. In that case it is equivalent to
@cindex labeled narrowing
@cindex labeled restriction
When the optional argument @var{label}, a symbol, is present, the
When the optional argument @var{label}, which is evaluated to get the
label to use and must yield a non-@code{nil} value, is present, the
narrowing is @dfn{labeled}. A labeled narrowing differs from a
non-labeled one in several ways:

15
lisp/subr.el
View file

@ -3964,11 +3964,11 @@ See also `locate-user-emacs-file'.")
The current restrictions, if any, are restored upon return.
When the optional :label LABEL argument is present, in which
LABEL is a symbol, inside BODY, `narrow-to-region' and `widen'
can be used only within the START and END limits. To gain access
to other portions of the buffer, use `without-restriction' with the
same LABEL argument.
When the optional LABEL argument, which is evaluated to get the
label to use and must yield a non-nil value, is present, inside
BODY, `narrow-to-region' and `widen' can be used only within the
START and END limits. To gain access to other portions of the
buffer, use `without-restriction' with the same LABEL argument.
\(fn START END [:label LABEL] BODY)"
(declare (indent 2) (debug t))
@ -3990,9 +3990,8 @@ same LABEL argument.
The current restrictions, if any, are restored upon return.
When the optional :label LABEL argument is present, the
restrictions set by `with-restriction' with the same LABEL argument
are lifted.
When the optional LABEL argument is present, the restrictions set
by `with-restriction' with the same LABEL argument are lifted.
\(fn [:label LABEL] BODY)"
(declare (indent 0) (debug t))