103 lines
4.2 KiB
HTML
103 lines
4.2 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>SRFI-28 (Guile Reference Manual)</title>
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<meta name="description" content="SRFI-28 (Guile Reference Manual)">
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<meta name="keywords" content="SRFI-28 (Guile Reference Manual)">
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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="SRFI-Support.html" rel="up" title="SRFI Support">
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<link href="SRFI_002d30.html" rel="next" title="SRFI-30">
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<link href="SRFI_002d27.html" rel="prev" title="SRFI-27">
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<style type="text/css">
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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="subsection-level-extent" id="SRFI_002d28">
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<div class="nav-panel">
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<p>
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Next: <a href="SRFI_002d30.html" accesskey="n" rel="next">SRFI-30 - Nested Multi-line Comments</a>, Previous: <a href="SRFI_002d27.html" accesskey="p" rel="prev">SRFI-27 - Sources of Random Bits</a>, Up: <a href="SRFI-Support.html" accesskey="u" rel="up">SRFI Support Modules</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="subsection" id="SRFI_002d28-_002d-Basic-Format-Strings"><span>7.5.20 SRFI-28 - Basic Format Strings<a class="copiable-link" href="#SRFI_002d28-_002d-Basic-Format-Strings"> ¶</a></span></h4>
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<a class="index-entry-id" id="index-SRFI_002d28"></a>
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<p>SRFI-28 provides a basic <code class="code">format</code> procedure that provides only
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the <code class="code">~a</code>, <code class="code">~s</code>, <code class="code">~%</code>, and <code class="code">~~</code> format specifiers.
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You can import this procedure by using:
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</p>
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<div class="example lisp">
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<pre class="lisp-preformatted">(use-modules (srfi srfi-28))
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</pre></div>
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<dl class="first-deffn">
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<dt class="deffn" id="index-format"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">format</strong> <var class="def-var-arguments">message arg …</var><a class="copiable-link" href="#index-format"> ¶</a></span></dt>
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<dd><p>Returns a formatted message, using <var class="var">message</var> as the format string,
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which can contain the following format specifiers:
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</p>
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<dl class="table">
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<dt><code class="code">~a</code></dt>
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<dd><p>Insert the textual representation of the next <var class="var">arg</var>, as if printed
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by <code class="code">display</code>.
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</p>
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</dd>
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<dt><code class="code">~s</code></dt>
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<dd><p>Insert the textual representation of the next <var class="var">arg</var>, as if printed
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by <code class="code">write</code>.
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</p>
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</dd>
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<dt><code class="code">~%</code></dt>
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<dd><p>Insert a newline.
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</p>
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</dd>
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<dt><code class="code">~~</code></dt>
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<dd><p>Insert a tilde.
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</p></dd>
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</dl>
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<p>This procedure is the same as calling <code class="code">simple-format</code>
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(see <a class="pxref" href="Simple-Output.html">Simple Textual Output</a>) with <code class="code">#f</code> as the destination.
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</p></dd></dl>
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</div>
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</body>
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</html>
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