125 lines
5.5 KiB
HTML
125 lines
5.5 KiB
HTML
|
<!DOCTYPE html>
|
||
|
|
<html>
|
||
|
|
<!-- Created by GNU Texinfo 7.1, https://www.gnu.org/software/texinfo/ -->
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
|
|
<!-- This manual documents Guile version 3.0.10.
|
||
|
|
|
||
|
|
Copyright (C) 1996-1997, 2000-2005, 2009-2023 Free Software Foundation,
|
||
|
|
Inc.
|
||
|
|
|
||
|
|
Copyright (C) 2021 Maxime Devos
|
||
|
|
|
||
|
|
Copyright (C) 2024 Tomas Volf
|
||
|
|
|
||
|
|
|
||
|
|
Permission is granted to copy, distribute and/or modify this document
|
||
|
|
under the terms of the GNU Free Documentation License, Version 1.3 or
|
||
|
|
any later version published by the Free Software Foundation; with no
|
||
|
|
Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A
|
||
|
|
copy of the license is included in the section entitled "GNU Free
|
||
|
|
Documentation License." -->
|
||
|
|
<title>Runtime Options (Guile Reference Manual)</title>
|
||
|
|
|
||
|
|
<meta name="description" content="Runtime Options (Guile Reference Manual)">
|
||
|
|
<meta name="keywords" content="Runtime Options (Guile Reference Manual)">
|
||
|
|
<meta name="resource-type" content="document">
|
||
|
|
<meta name="distribution" content="global">
|
||
|
|
<meta name="Generator" content=".texi2any-real">
|
||
|
|
<meta name="viewport" content="width=device-width,initial-scale=1">
|
||
|
|
|
||
|
|
<link href="index.html" rel="start" title="Top">
|
||
|
|
<link href="Concept-Index.html" rel="index" title="Concept Index">
|
||
|
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
||
|
|
<link href="Options-and-Config.html" rel="up" title="Options and Config">
|
||
|
|
<link href="Feature-Tracking.html" rel="prev" title="Feature Tracking">
|
||
|
|
<style type="text/css">
|
||
|
|
<!--
|
||
|
|
a.copiable-link {visibility: hidden; text-decoration: none; line-height: 0em}
|
||
|
|
div.example {margin-left: 3.2em}
|
||
|
|
span:hover a.copiable-link {visibility: visible}
|
||
|
|
-->
|
||
|
|
</style>
|
||
|
|
<link rel="stylesheet" type="text/css" href="https://www.gnu.org/software/gnulib/manual.css">
|
||
|
|
|
||
|
|
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body lang="en">
|
||
|
|
<div class="subsection-level-extent" id="Runtime-Options">
|
||
|
|
<div class="nav-panel">
|
||
|
|
<p>
|
||
|
|
Previous: <a href="Feature-Tracking.html" accesskey="p" rel="prev">Feature Tracking</a>, Up: <a href="Options-and-Config.html" accesskey="u" rel="up">Configuration, Features and Runtime Options</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>
|
||
|
|
</div>
|
||
|
|
<hr>
|
||
|
|
<h4 class="subsection" id="Runtime-Options-1"><span>6.23.3 Runtime Options<a class="copiable-link" href="#Runtime-Options-1"> ¶</a></span></h4>
|
||
|
|
|
||
|
|
<p>There are a number of runtime options available for parameterizing
|
||
|
|
built-in procedures, like <code class="code">read</code>, and built-in behavior, like what
|
||
|
|
happens on an uncaught error.
|
||
|
|
</p>
|
||
|
|
<p>For more information on reader options, See <a class="xref" href="Scheme-Read.html">Reading Scheme Code</a>.
|
||
|
|
</p>
|
||
|
|
<p>For more information on print options, See <a class="xref" href="Scheme-Write.html">Writing Scheme Values</a>.
|
||
|
|
</p>
|
||
|
|
<p>Finally, for more information on debugger options, See <a class="xref" href="Debug-Options.html">Debug options</a>.
|
||
|
|
</p>
|
||
|
|
<ul class="mini-toc">
|
||
|
|
<li><a href="#Examples-of-option-use" accesskey="1">Examples of option use</a></li>
|
||
|
|
</ul>
|
||
|
|
<div class="subsubsection-level-extent" id="Examples-of-option-use">
|
||
|
|
<h4 class="subsubsection"><span>6.23.3.1 Examples of option use<a class="copiable-link" href="#Examples-of-option-use"> ¶</a></span></h4>
|
||
|
|
|
||
|
|
<p>Here is an example of a session in which some read and debug option
|
||
|
|
handling procedures are used. In this example, the user
|
||
|
|
</p>
|
||
|
|
<ol class="enumerate">
|
||
|
|
<li> Notices that the symbols <code class="code">abc</code> and <code class="code">aBc</code> are not the same
|
||
|
|
</li><li> Examines the <code class="code">read-options</code>, and sees that <code class="code">case-insensitive</code>
|
||
|
|
is set to “no”.
|
||
|
|
</li><li> Enables <code class="code">case-insensitive</code>
|
||
|
|
</li><li> Quits the recursive prompt
|
||
|
|
</li><li> Verifies that now <code class="code">aBc</code> and <code class="code">abc</code> are the same
|
||
|
|
</li></ol>
|
||
|
|
|
||
|
|
<div class="example smalllisp lisp">
|
||
|
|
<pre class="lisp-preformatted">scheme@(guile-user)> (define abc "hello")
|
||
|
|
scheme@(guile-user)> abc
|
||
|
|
$1 = "hello"
|
||
|
|
scheme@(guile-user)> aBc
|
||
|
|
<unknown-location>: warning: possibly unbound variable `aBc'
|
||
|
|
ERROR: In procedure module-lookup:
|
||
|
|
ERROR: Unbound variable: aBc
|
||
|
|
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue.
|
||
|
|
scheme@(guile-user) [1]> (read-options 'help)
|
||
|
|
copy no Copy source code expressions.
|
||
|
|
positions yes Record positions of source code expressions.
|
||
|
|
case-insensitive no Convert symbols to lower case.
|
||
|
|
keywords #f Style of keyword recognition: #f, 'prefix or 'postfix.
|
||
|
|
r6rs-hex-escapes no Use R6RS variable-length character and string hex escapes.
|
||
|
|
square-brackets yes Treat `[' and `]' as parentheses, for R6RS compatibility.
|
||
|
|
hungry-eol-escapes no In strings, consume leading whitespace after an
|
||
|
|
escaped end-of-line.
|
||
|
|
curly-infix no Support SRFI-105 curly infix expressions.
|
||
|
|
scheme@(guile-user) [1]> (read-enable 'case-insensitive)
|
||
|
|
$2 = (square-brackets keywords #f case-insensitive positions)
|
||
|
|
scheme@(guile-user) [1]> ,q
|
||
|
|
scheme@(guile-user)> aBc
|
||
|
|
$3 = "hello"
|
||
|
|
</pre></div>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<hr>
|
||
|
|
<div class="nav-panel">
|
||
|
|
<p>
|
||
|
|
Previous: <a href="Feature-Tracking.html">Feature Tracking</a>, Up: <a href="Options-and-Config.html">Configuration, Features and Runtime Options</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>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|