diff options
author | Richard Stallman <rms@gnu.org> | 2023-11-19 12:14:36 +0200 |
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committer | Eli Zaretskii <eliz@gnu.org> | 2023-11-19 12:14:36 +0200 |
commit | e521669fb3f5fea6f7b9ee88cbcbcf2750c00f9d (patch) | |
tree | 9cf553e3318c3fc68a3623ee4f0043bc63afb92a /doc/lispintro | |
parent | da946ca6924b5ba1a1c785284406cf894aef12b5 (diff) |
Fix wording in ELisp Intro manual
* doc/lispintro/emacs-lisp-intro.texi (Lisp macro): Improve
wording in description of 'unless'. (Bug#67185)
Diffstat (limited to 'doc/lispintro')
-rw-r--r-- | doc/lispintro/emacs-lisp-intro.texi | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/doc/lispintro/emacs-lisp-intro.texi b/doc/lispintro/emacs-lisp-intro.texi index c5b33ac5eaa..e4a0f585f69 100644 --- a/doc/lispintro/emacs-lisp-intro.texi +++ b/doc/lispintro/emacs-lisp-intro.texi @@ -8165,9 +8165,9 @@ the expectation that all goes well has a @code{when}. The code uses text that exists. A @code{when} expression is simply a programmers' convenience. It is -an @code{if} without the possibility of an else clause. In your mind, -you can replace @code{when} with @code{if} and understand what goes -on. That is what the Lisp interpreter does. +like an @code{if} without the possibility of an else clause. In your +mind, you can replace @code{when} with @code{if} and understand what +goes on. That is what the Lisp interpreter does. Technically speaking, @code{when} is a Lisp macro. A Lisp macro enables you to define new control constructs and other language @@ -8176,8 +8176,9 @@ expression which will in turn compute the value. In this case, the other expression is an @code{if} expression. The @code{kill-region} function definition also has an @code{unless} -macro; it is the converse of @code{when}. The @code{unless} macro is -an @code{if} without a then clause +macro; it is the opposite of @code{when}. The @code{unless} macro is +like an @code{if} except that it has no then-clause, and it supplies +an implicit @code{nil} for that. For more about Lisp macros, see @ref{Macros, , Macros, elisp, The GNU Emacs Lisp Reference Manual}. The C programming language also |