116 lines
6 KiB
HTML
116 lines
6 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>Debug Options (Guile Reference Manual)</title>
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<meta name="description" content="Debug Options (Guile Reference Manual)">
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<meta name="keywords" content="Debug Options (Guile Reference Manual)">
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<meta name="Generator" content=".texi2any-real">
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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="Programmatic-Error-Handling.html" rel="up" title="Programmatic Error Handling">
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<link href="Stack-Overflow.html" rel="prev" title="Stack Overflow">
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<style type="text/css">
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a.copiable-link {visibility: hidden; text-decoration: none; line-height: 0em}
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strong.def-name {font-family: monospace; font-weight: bold; font-size: larger}
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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="Debug-Options">
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<div class="nav-panel">
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<p>
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Previous: <a href="Stack-Overflow.html" accesskey="p" rel="prev">Stack Overflow</a>, Up: <a href="Programmatic-Error-Handling.html" accesskey="u" rel="up">Programmatic Error Handling</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="Debug-options"><span>6.26.3.5 Debug options<a class="copiable-link" href="#Debug-options"> ¶</a></span></h4>
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<p>The behavior of the <code class="code">backtrace</code> procedure and of the default error
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handler can be parameterized via the debug options.
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</p>
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<a class="index-entry-id" id="index-options-_002d-debug"></a>
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<a class="index-entry-id" id="index-debug-options"></a>
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<dl class="first-deffn">
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<dt class="deffn" id="index-debug_002doptions"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">debug-options</strong> <var class="def-var-arguments">[setting]</var><a class="copiable-link" href="#index-debug_002doptions"> ¶</a></span></dt>
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<dd><p>Display the current settings of the debug options. If <var class="var">setting</var> is
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omitted, only a short form of the current read options is printed.
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Otherwise if <var class="var">setting</var> is the symbol <code class="code">help</code>, a complete options
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description is displayed.
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</p></dd></dl>
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<p>The set of available options, and their default values, may be had by
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invoking <code class="code">debug-options</code> at the prompt.
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</p>
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<div class="example smallexample">
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<pre class="example-preformatted">scheme@(guile-user)>
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backwards no Display backtrace in anti-chronological order.
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width 79 Maximal width of backtrace.
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depth 20 Maximal length of printed backtrace.
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backtrace yes Show backtrace on error.
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stack 1048576 Stack size limit (measured in words;
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0 = no check).
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show-file-name #t Show file names and line numbers in backtraces
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when not `#f'. A value of `base' displays only
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base names, while `#t' displays full names.
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warn-deprecated no Warn when deprecated features are used.
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</pre></div>
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<p>The boolean options may be toggled with <code class="code">debug-enable</code> and
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<code class="code">debug-disable</code>. The non-boolean options must be set using
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<code class="code">debug-set!</code>.
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</p>
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<dl class="first-deffn">
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<dt class="deffn" id="index-debug_002denable"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">debug-enable</strong> <var class="def-var-arguments">option-name</var><a class="copiable-link" href="#index-debug_002denable"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-debug_002ddisable"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">debug-disable</strong> <var class="def-var-arguments">option-name</var><a class="copiable-link" href="#index-debug_002ddisable"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-debug_002dset_0021"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">debug-set!</strong> <var class="def-var-arguments">option-name value</var><a class="copiable-link" href="#index-debug_002dset_0021"> ¶</a></span></dt>
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<dd><p>Modify the debug options. <code class="code">debug-enable</code> should be used with boolean
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options and switches them on, <code class="code">debug-disable</code> switches them off.
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</p>
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<p><code class="code">debug-set!</code> can be used to set an option to a specific value. Due
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to historical oddities, it is a macro that expects an unquoted option
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name.
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</p></dd></dl>
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</div>
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<hr>
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<div class="nav-panel">
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<p>
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Previous: <a href="Stack-Overflow.html">Stack Overflow</a>, Up: <a href="Programmatic-Error-Handling.html">Programmatic Error Handling</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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</body>
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</html>
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