85 lines
3.4 KiB
HTML
85 lines
3.4 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>Binding Multiple Values (Guile Reference Manual)</title>
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<meta name="description" content="Binding Multiple Values (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="Binding-Constructs.html" rel="up" title="Binding Constructs">
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<link href="Binding-Reflection.html" rel="prev" title="Binding Reflection">
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</head>
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<body lang="en">
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<div class="subsection-level-extent" id="Binding-Multiple-Values">
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<div class="nav-panel">
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<p>
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Previous: <a href="Binding-Reflection.html" accesskey="p" rel="prev">Querying variable bindings</a>, Up: <a href="Binding-Constructs.html" accesskey="u" rel="up">Definitions and Variable Bindings</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="Binding-multiple-return-values"><span>6.10.5 Binding multiple return values<a class="copiable-link" href="#Binding-multiple-return-values"> ¶</a></span></h4>
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<dl class="first-deffn">
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<dt class="deffn" id="index-define_002dvalues"><span class="category-def">Syntax: </span><span><strong class="def-name">define-values</strong> <var class="def-var-arguments">formals expression</var><a class="copiable-link" href="#index-define_002dvalues"> ¶</a></span></dt>
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<dd><p>The <var class="var">expression</var> is evaluated, and the <var class="var">formals</var> are bound to
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the return values in the same way that the formals in a <code class="code">lambda</code>
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expression are matched to the arguments in a procedure call.
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</p></dd></dl>
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<div class="example">
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<pre class="example-preformatted">(define-values (q r) (floor/ 10 3))
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(list q r) ⇒ (3 1)
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(define-values (x . y) (values 1 2 3))
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x ⇒ 1
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y ⇒ (2 3)
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(define-values x (values 1 2 3))
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x ⇒ (1 2 3)
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</pre></div>
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</div>
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</body>
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</html>
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