89 lines
3.5 KiB
HTML
89 lines
3.5 KiB
HTML
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<!DOCTYPE html>
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<html>
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<!-- Created by GNU Texinfo 7.1, https://www.gnu.org/software/texinfo/ -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<!-- This manual documents Guile version 3.0.10.
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Copyright (C) 1996-1997, 2000-2005, 2009-2023 Free Software Foundation,
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Inc.
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Copyright (C) 2021 Maxime Devos
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Copyright (C) 2024 Tomas Volf
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with no
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Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A
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copy of the license is included in the section entitled "GNU Free
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Documentation License." -->
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<title>Case Sensitivity (Guile Reference Manual)</title>
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<meta name="description" content="Case Sensitivity (Guile Reference Manual)">
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<meta name="keywords" content="Case Sensitivity (Guile Reference Manual)">
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<meta name="viewport" content="width=device-width,initial-scale=1">
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<link href="index.html" rel="start" title="Top">
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<link href="Concept-Index.html" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Scheme-Syntax.html" rel="up" title="Scheme Syntax">
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<link href="Keyword-Syntax.html" rel="next" title="Keyword Syntax">
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<link href="Block-Comments.html" rel="prev" title="Block Comments">
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<style type="text/css">
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<!--
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a.copiable-link {visibility: hidden; text-decoration: none; line-height: 0em}
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div.example {margin-left: 3.2em}
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span:hover a.copiable-link {visibility: visible}
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</style>
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<link rel="stylesheet" type="text/css" href="https://www.gnu.org/software/gnulib/manual.css">
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</head>
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<body lang="en">
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<div class="subsubsection-level-extent" id="Case-Sensitivity">
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<div class="nav-panel">
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<p>
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Next: <a href="Keyword-Syntax.html" accesskey="n" rel="next">Keyword Syntax</a>, Previous: <a href="Block-Comments.html" accesskey="p" rel="prev">Block Comments</a>, Up: <a href="Scheme-Syntax.html" accesskey="u" rel="up">Scheme Syntax: Standard and Guile Extensions</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<h4 class="subsubsection" id="Case-Sensitivity-1"><span>6.16.1.4 Case Sensitivity<a class="copiable-link" href="#Case-Sensitivity-1"> ¶</a></span></h4>
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<a class="index-entry-id" id="index-fold_002dcase"></a>
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<a class="index-entry-id" id="index-no_002dfold_002dcase"></a>
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<p>Scheme as defined in R5RS is not case sensitive when reading symbols.
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Guile, on the contrary is case sensitive by default, so the identifiers
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</p>
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<div class="example lisp">
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<pre class="lisp-preformatted">guile-whuzzy
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Guile-Whuzzy
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</pre></div>
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<p>are the same in R5RS Scheme, but are different in Guile.
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</p>
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<p>It is possible to turn off case sensitivity in Guile by setting the
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reader option <code class="code">case-insensitive</code>. For more information on reader
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options, See <a class="xref" href="Scheme-Read.html">Reading Scheme Code</a>.
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</p>
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<div class="example lisp">
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<pre class="lisp-preformatted">(read-enable 'case-insensitive)
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</pre></div>
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<p>It is also possible to disable (or enable) case sensitivity within a
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single file by placing the reader directives <code class="code">#!fold-case</code> (or
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<code class="code">#!no-fold-case</code>) within the file itself.
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</p>
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</div>
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</body>
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</html>
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