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| author | Craig Jennings <c@cjennings.net> | 2024-04-07 13:41:34 -0500 |
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| committer | Craig Jennings <c@cjennings.net> | 2024-04-07 13:41:34 -0500 |
| commit | 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 (patch) | |
| tree | f1190704f78f04a2b0b4c977d20fe96a828377f1 /devdocs/elisp/nonprinting-characters.html | |
new repository
Diffstat (limited to 'devdocs/elisp/nonprinting-characters.html')
| -rw-r--r-- | devdocs/elisp/nonprinting-characters.html | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/devdocs/elisp/nonprinting-characters.html b/devdocs/elisp/nonprinting-characters.html new file mode 100644 index 00000000..9a296a68 --- /dev/null +++ b/devdocs/elisp/nonprinting-characters.html @@ -0,0 +1,6 @@ + <h4 class="subsubsection">Nonprinting Characters in Strings</h4> <p>You can use the same backslash escape-sequences in a string constant as in character literals (but do not use the question mark that begins a character constant). For example, you can write a string containing the nonprinting characters tab and <kbd>C-a</kbd>, with commas and spaces between them, like this: <code>"\t, \C-a"</code>. See <a href="character-type">Character Type</a>, for a description of the read syntax for characters. </p> <p>However, not all of the characters you can write with backslash escape-sequences are valid in strings. The only control characters that a string can hold are the <acronym>ASCII</acronym> control characters. Strings do not distinguish case in <acronym>ASCII</acronym> control characters. </p> <p>Properly speaking, strings cannot hold meta characters; but when a string is to be used as a key sequence, there is a special convention that provides a way to represent meta versions of <acronym>ASCII</acronym> characters in a string. If you use the ‘<samp>\M-</samp>’ syntax to indicate a meta character in a string constant, this sets the 2**7 bit of the character in the string. If the string is used in <code>define-key</code> or <code>lookup-key</code>, this numeric code is translated into the equivalent meta character. See <a href="character-type">Character Type</a>. </p> <p>Strings cannot hold characters that have the hyper, super, or alt modifiers. </p><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/Nonprinting-Characters.html" class="_attribution-link">https://www.gnu.org/software/emacs/manual/html_node/elisp/Nonprinting-Characters.html</a> + </p> +</div> |