127 lines
6.9 KiB
HTML
127 lines
6.9 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>Generic Functions (Guile Reference Manual)</title>
|
||
|
|
|
||
|
|
<meta name="description" content="Generic Functions (Guile Reference Manual)">
|
||
|
|
<meta name="keywords" content="Generic Functions (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="Introspection.html" rel="up" title="Introspection">
|
||
|
|
<link href="Accessing-Slots.html" rel="next" title="Accessing Slots">
|
||
|
|
<link href="Slots.html" rel="prev" title="Slots">
|
||
|
|
<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}
|
||
|
|
strong.def-name {font-family: monospace; font-weight: bold; font-size: larger}
|
||
|
|
-->
|
||
|
|
</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="Generic-Functions">
|
||
|
|
<div class="nav-panel">
|
||
|
|
<p>
|
||
|
|
Next: <a href="Accessing-Slots.html" accesskey="n" rel="next">Accessing Slots</a>, Previous: <a href="Slots.html" accesskey="p" rel="prev">Slots</a>, Up: <a href="Introspection.html" accesskey="u" rel="up">Introspection</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="Generic-Functions-1"><span>8.8.4 Generic Functions<a class="copiable-link" href="#Generic-Functions-1"> ¶</a></span></h4>
|
||
|
|
|
||
|
|
<p>A generic function is an instance of the <code class="code"><generic></code> class, or of a
|
||
|
|
subclass of <code class="code"><generic></code>. The definition of the <code class="code"><generic></code>
|
||
|
|
class has slots that are used to describe the properties of a generic
|
||
|
|
function.
|
||
|
|
</p>
|
||
|
|
<dl class="first-deffn">
|
||
|
|
<dt class="deffn" id="index-generic_002dfunction_002dname"><span class="category-def">primitive procedure: </span><span><strong class="def-name">generic-function-name</strong> <var class="def-var-arguments">gf</var><a class="copiable-link" href="#index-generic_002dfunction_002dname"> ¶</a></span></dt>
|
||
|
|
<dd><p>Return the name of generic function <var class="var">gf</var>.
|
||
|
|
</p></dd></dl>
|
||
|
|
|
||
|
|
<dl class="first-deffn">
|
||
|
|
<dt class="deffn" id="index-generic_002dfunction_002dmethods"><span class="category-def">primitive procedure: </span><span><strong class="def-name">generic-function-methods</strong> <var class="def-var-arguments">gf</var><a class="copiable-link" href="#index-generic_002dfunction_002dmethods"> ¶</a></span></dt>
|
||
|
|
<dd><p>Return a list of the methods of generic function <var class="var">gf</var>. This is the
|
||
|
|
value of <var class="var">gf</var>’s <code class="code">methods</code> slot.
|
||
|
|
</p></dd></dl>
|
||
|
|
|
||
|
|
<p>Similarly, a method is an instance of the <code class="code"><method></code> class, or of a
|
||
|
|
subclass of <code class="code"><method></code>; and the definition of the <code class="code"><method></code>
|
||
|
|
class has slots that are used to describe the properties of a method.
|
||
|
|
</p>
|
||
|
|
<dl class="first-deffn">
|
||
|
|
<dt class="deffn" id="index-method_002dgeneric_002dfunction"><span class="category-def">primitive procedure: </span><span><strong class="def-name">method-generic-function</strong> <var class="def-var-arguments">method</var><a class="copiable-link" href="#index-method_002dgeneric_002dfunction"> ¶</a></span></dt>
|
||
|
|
<dd><p>Return the generic function that <var class="var">method</var> belongs to. This is the
|
||
|
|
value of <var class="var">method</var>’s <code class="code">generic-function</code> slot.
|
||
|
|
</p></dd></dl>
|
||
|
|
|
||
|
|
<dl class="first-deffn">
|
||
|
|
<dt class="deffn" id="index-method_002dspecializers"><span class="category-def">primitive procedure: </span><span><strong class="def-name">method-specializers</strong> <var class="def-var-arguments">method</var><a class="copiable-link" href="#index-method_002dspecializers"> ¶</a></span></dt>
|
||
|
|
<dd><p>Return a list of <var class="var">method</var>’s formal parameter specializers . This is
|
||
|
|
the value of <var class="var">method</var>’s <code class="code">specializers</code> slot.
|
||
|
|
</p></dd></dl>
|
||
|
|
|
||
|
|
<dl class="first-deffn">
|
||
|
|
<dt class="deffn" id="index-method_002dprocedure"><span class="category-def">primitive procedure: </span><span><strong class="def-name">method-procedure</strong> <var class="def-var-arguments">method</var><a class="copiable-link" href="#index-method_002dprocedure"> ¶</a></span></dt>
|
||
|
|
<dd><p>Return the procedure that implements <var class="var">method</var>. This is the value of
|
||
|
|
<var class="var">method</var>’s <code class="code">procedure</code> slot.
|
||
|
|
</p></dd></dl>
|
||
|
|
|
||
|
|
<dl class="first-deffn">
|
||
|
|
<dt class="deffn" id="index-method_002dsource"><span class="category-def">generic: </span><span><strong class="def-name">method-source</strong><a class="copiable-link" href="#index-method_002dsource"> ¶</a></span></dt>
|
||
|
|
<dt class="deffnx def-cmd-deffn" id="index-method_002dsource-1"><span class="category-def">method: </span><span><strong class="def-name">method-source</strong> <var class="def-var-arguments">(m <method>)</var><a class="copiable-link" href="#index-method_002dsource-1"> ¶</a></span></dt>
|
||
|
|
<dd><p>Return an expression that prints to show the definition of method
|
||
|
|
<var class="var">m</var>.
|
||
|
|
</p>
|
||
|
|
<div class="example">
|
||
|
|
<pre class="example-preformatted">(define-generic cube)
|
||
|
|
|
||
|
|
(define-method (cube (n <number>))
|
||
|
|
(* n n n))
|
||
|
|
|
||
|
|
(map method-source (generic-function-methods cube))
|
||
|
|
⇒
|
||
|
|
((method ((n <number>)) (* n n n)))
|
||
|
|
</pre></div>
|
||
|
|
</dd></dl>
|
||
|
|
|
||
|
|
|
||
|
|
</div>
|
||
|
|
<hr>
|
||
|
|
<div class="nav-panel">
|
||
|
|
<p>
|
||
|
|
Next: <a href="Accessing-Slots.html">Accessing Slots</a>, Previous: <a href="Slots.html">Slots</a>, Up: <a href="Introspection.html">Introspection</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>
|