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| author | Craig Jennings <c@cjennings.net> | 2025-08-14 22:58:58 -0500 |
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| committer | Craig Jennings <c@cjennings.net> | 2025-08-14 22:58:58 -0500 |
| commit | 82ba818ff456bcd6d56a06226e3f27e98fbb55c3 (patch) | |
| tree | 158cfc17b2f644a10f063cb546752cfaae12c97f /devdocs/elisp/variables-with-restricted-values.html | |
| parent | 9278ddd4ea1a8b1a4c1edaa8894516e3f48d245b (diff) | |
| download | dotemacs-82ba818ff456bcd6d56a06226e3f27e98fbb55c3.tar.gz dotemacs-82ba818ff456bcd6d56a06226e3f27e98fbb55c3.zip | |
removing all downloaded devdocs files
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| -rw-r--r-- | devdocs/elisp/variables-with-restricted-values.html | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/devdocs/elisp/variables-with-restricted-values.html b/devdocs/elisp/variables-with-restricted-values.html deleted file mode 100644 index a8743b03..00000000 --- a/devdocs/elisp/variables-with-restricted-values.html +++ /dev/null @@ -1,15 +0,0 @@ - <h3 class="section">Variables with Restricted Values</h3> <p>Ordinary Lisp variables can be assigned any value that is a valid Lisp object. However, certain Lisp variables are not defined in Lisp, but in C. Most of these variables are defined in the C code using <code>DEFVAR_LISP</code>. Like variables defined in Lisp, these can take on any value. However, some variables are defined using <code>DEFVAR_INT</code> or <code>DEFVAR_BOOL</code>. See <a href="writing-emacs-primitives#Defining-Lisp-variables-in-C">Writing Emacs Primitives</a>, in particular the description of functions of the type <code>syms_of_<var>filename</var></code>, for a brief discussion of the C implementation. </p> <p>Variables of type <code>DEFVAR_BOOL</code> can only take on the values <code>nil</code> or <code>t</code>. Attempting to assign them any other value will set them to <code>t</code>: </p> <div class="example"> <pre class="example">(let ((display-hourglass 5)) - display-hourglass) - ⇒ t -</pre> -</div> <dl> <dt id="byte-boolean-vars">Variable: <strong>byte-boolean-vars</strong> -</dt> <dd><p>This variable holds a list of all variables of type <code>DEFVAR_BOOL</code>. </p></dd> -</dl> <p>Variables of type <code>DEFVAR_INT</code> can take on only integer values. Attempting to assign them any other value will result in an error: </p> <div class="example"> <pre class="example">(setq undo-limit 1000.0) -error→ Wrong type argument: integerp, 1000.0 -</pre> -</div><div class="_attribution"> - <p class="_attribution-p"> - Copyright © 1990-1996, 1998-2022 Free Software Foundation, Inc. <br>Licensed under the GNU GPL license.<br> - <a href="https://www.gnu.org/software/emacs/manual/html_node/elisp/Variables-with-Restricted-Values.html" class="_attribution-link">https://www.gnu.org/software/emacs/manual/html_node/elisp/Variables-with-Restricted-Values.html</a> - </p> -</div> |