<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="generator" content="rustdoc">
<title>Associated Types</title>
<link rel="stylesheet" type="text/css" href="../rust.css">
<meta name="robots" content="noindex,follow">
<link rel="shortcut icon" href="https://www.rust-lang.org/favicon.ico">
</head>
<body class="rustdoc">
<!--[if lte IE 8]>
<div class="warning">
This old browser is unsupported and will most likely display funky
things.
</div>
<![endif]-->
<div id="versioninfo">
<img src="https://www.rust-lang.org/logos/rust-logo-32x32-blk.png" width="32" height="32" alt="Rust logo"><br>
<span class="white-sticker"><a href="https://www.rust-lang.org">Rust</a> 1.35.0</span><br>
<a href="https://github.com/rust-lang/rust/commit/"
class="hash white-sticker"></a>
</div>
<h1 class="title">Associated Types</h1>
<p><small>There is a new edition of the book and this is an old link.</small></p>
<blockquote>
<p>Associated types are a way of associating a type placeholder with a trait such that the trait method definitions can use these placeholder types in their signatures.</p>
</blockquote>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">Iterator</span> {
<span class="kw">type</span> <span class="ident">Item</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Item</span><span class="op">></span>;
}<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Afn%20main()%20%7B%0Apub%20trait%20Iterator%20%7B%0A%20%20%20%20type%20Item%3B%0A%20%20%20%20fn%20next(%26mut%20self)%20-%3E%20Option%3CSelf%3A%3AItem%3E%3B%0A%7D%0A%7D">Run</a></pre></div>
<hr />
<p>You can find the latest version of this information
<a href="ch19-03-advanced-traits.html#specifying-placeholder-types-in-trait-definitions-with-associated-types">here</a>.</p>
<footer><p>
Copyright © 2011 The Rust Project Developers. Licensed under the
<a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>
or the <a href="https://opensource.org/licenses/MIT">MIT license</a>, at your option.
</p><p>
This file may not be copied, modified, or distributed except according to those terms.
</p></footer>
</body>
</html>
distrib
>
Mageia
>
7
>
armv7hl
>
media
>
core-release
>
by-pkgid
>
0c2243f8a1696816431e7210e991fa52
>
files
>
607
