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Fix wording in ELisp Intro manual

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* doc/lispintro/emacs-lisp-intro.texi (Lisp macro): Improve
wording in description of 'unless'.  (Bug#67185)
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Richard Stallman 2023-11-19 12:14:36 +02:00 • committed by Eli Zaretskii
parent da946ca692
commit e521669fb3
1 changed files with 6 additions and 5 deletions
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11
doc/lispintro/emacs-lisp-intro.texi
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@ -8165,9 +8165,9 @@ the expectation that all goes well has a @code{when}. The code uses
text that exists. text that exists.
A @code{when} expression is simply a programmers' convenience. It is A @code{when} expression is simply a programmers' convenience. It is
an @code{if} without the possibility of an else clause. In your mind, like an @code{if} without the possibility of an else clause. In your
you can replace @code{when} with @code{if} and understand what goes mind, you can replace @code{when} with @code{if} and understand what
on. That is what the Lisp interpreter does. goes on. That is what the Lisp interpreter does.
Technically speaking, @code{when} is a Lisp macro. A Lisp macro Technically speaking, @code{when} is a Lisp macro. A Lisp macro
enables you to define new control constructs and other language 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. other expression is an @code{if} expression.
The @code{kill-region} function definition also has an @code{unless} The @code{kill-region} function definition also has an @code{unless}
macro; it is the converse of @code{when}. The @code{unless} macro is macro; it is the opposite of @code{when}. The @code{unless} macro is
an @code{if} without a then clause 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 For more about Lisp macros, see @ref{Macros, , Macros, elisp, The GNU
Emacs Lisp Reference Manual}. The C programming language also Emacs Lisp Reference Manual}. The C programming language also