hasufell/pnmixer-rust
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
b807430d07
pnmixer-rust/gtk/trait.Cast.html

148 lines
10 KiB
HTML
Raw Normal View History

Update and fix
2017-07-14 23:30:16 +00:00
<!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">
<meta name="description" content="API documentation for the Rust `Cast` trait in crate `gtk`.">
<meta name="keywords" content="rust, rustlang, rust-lang, Cast">
<title>gtk::Cast - Rust</title>
<link rel="stylesheet" type="text/css" href="../normalize.css">
<link rel="stylesheet" type="text/css" href="../rustdoc.css">
<link rel="stylesheet" type="text/css" href="../main.css">
</head>
<body class="rustdoc trait">
<!--[if lte IE 8]>
<div class="warning">
This old browser is unsupported and will most likely display funky
things.
</div>
<![endif]-->
<nav class="sidebar">
<p class='location'>Trait Cast</p><div class="block items"><ul><li><a href="#provided-methods">Provided Methods</a></li><li><a href="#implementors">Implementors</a></li></ul></div><p class='location'><a href='index.html'>gtk</a></p><script>window.sidebarCurrent = {name: 'Cast', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script>
</nav>
<nav class="sub">
<form class="search-form js-only">
<div class="search-container">
<input class="search-input" name="search"
autocomplete="off"
placeholder="Click or press ‘S’ to search, ‘?’ for more options…"
type="search">
</div>
</form>
</nav>
<section id='main' class="content">
<h1 class='fqn'><span class='in-band'>Trait <a href='index.html'>gtk</a>::<wbr><a class="trait" href=''>Cast</a></span><span class='out-of-band'><span id='render-detail'>
<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
[<span class='inner'>&#x2212;</span>]
</a>
Update docs
2017-07-16 21:37:37 +00:00
</span><a class='srclink' href='../src/glib/object.rs.html#23-61' title='goto source code'>[src]</a></span></h1>
Update and fix
2017-07-14 23:30:16 +00:00
<pre class='rust trait'>pub trait Cast: <a class="trait" href="../gtk/trait.IsA.html" title="trait gtk::IsA">IsA</a>&lt;<a class="struct" href="../gtk/struct.Object.html" title="struct gtk::Object">Object</a>&gt; {
fn <a href='#method.upcast' class='fnname'>upcast</a>&lt;T&gt;(self) -&gt; T<br>&nbsp;&nbsp;&nbsp; <span class="where">where<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="../gtk/trait.IsA.html" title="trait gtk::IsA">IsA</a>&lt;T&gt;,<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../gtk/trait.StaticType.html" title="trait gtk::StaticType">StaticType</a> + <a class="trait" href="../glib/wrapper/trait.UnsafeFrom.html" title="trait glib::wrapper::UnsafeFrom">UnsafeFrom</a>&lt;ObjectRef&gt; + <a class="trait" href="../glib/wrapper/trait.Wrapper.html" title="trait glib::wrapper::Wrapper">Wrapper</a></span>,
{ ... }
fn <a href='#method.downcast' class='fnname'>downcast</a>&lt;T&gt;(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, Self&gt;<br>&nbsp;&nbsp;&nbsp; <span class="where">where<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="../glib/object/trait.Downcast.html" title="trait glib::object::Downcast">Downcast</a>&lt;T&gt;</span>,
{ ... }
fn <a href='#method.is' class='fnname'>is</a>&lt;T&gt;(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a><br>&nbsp;&nbsp;&nbsp; <span class="where">where<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="../glib/object/trait.Downcast.html" title="trait glib::object::Downcast">Downcast</a>&lt;T&gt;</span>,
{ ... }
}</pre><div class='docblock'><p>Upcasting and downcasting support.</p>
<p>Provides conversions up and down the class hierarchy tree.</p>
</div>
<h2 id='provided-methods'>Provided Methods</h2>
<div class='methods'>
<h3 id='method.upcast' class='method'><span id='upcast.v' class='invisible'><code>fn <a href='#method.upcast' class='fnname'>upcast</a>&lt;T&gt;(self) -&gt; T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="../gtk/trait.IsA.html" title="trait gtk::IsA">IsA</a>&lt;T&gt;,<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../gtk/trait.StaticType.html" title="trait gtk::StaticType">StaticType</a> + <a class="trait" href="../glib/wrapper/trait.UnsafeFrom.html" title="trait glib::wrapper::UnsafeFrom">UnsafeFrom</a>&lt;ObjectRef&gt; + <a class="trait" href="../glib/wrapper/trait.Wrapper.html" title="trait glib::wrapper::Wrapper">Wrapper</a>,&nbsp;</span></code></span></h3><div class='docblock'><p>Upcasts an object to a superclass or interface <code>T</code>.</p>
<h1 id='example' class='section-header'><a href='#example'>Example</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">button</span> <span class="op">=</span> <span class="ident">gtk</span>::<span class="ident">Button</span>::<span class="ident">new</span>();
<span class="kw">let</span> <span class="ident">widget</span> <span class="op">=</span> <span class="ident">button</span>.<span class="ident">upcast</span>::<span class="op">&lt;</span><span class="ident">gtk</span>::<span class="ident">Widget</span><span class="op">&gt;</span>();</pre>
</div><h3 id='method.downcast' class='method'><span id='downcast.v' class='invisible'><code>fn <a href='#method.downcast' class='fnname'>downcast</a>&lt;T&gt;(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, Self&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="../glib/object/trait.Downcast.html" title="trait glib::object::Downcast">Downcast</a>&lt;T&gt;,&nbsp;</span></code></span></h3><div class='docblock'><p>Tries to downcast to a subclass or interface implementor <code>T</code>.</p>
<p>Returns <code>Ok(T)</code> if the object is an instance of <code>T</code> and <code>Err(self)</code>
otherwise.</p>
<h1 id='example-1' class='section-header'><a href='#example-1'>Example</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">let</span> <span class="ident">button</span> <span class="op">=</span> <span class="ident">gtk</span>::<span class="ident">Button</span>::<span class="ident">new</span>();
<span class="kw">let</span> <span class="ident">widget</span> <span class="op">=</span> <span class="ident">button</span>.<span class="ident">upcast</span>::<span class="op">&lt;</span><span class="ident">gtk</span>::<span class="ident">Widget</span><span class="op">&gt;</span>();
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">widget</span>.<span class="ident">downcast</span>::<span class="op">&lt;</span><span class="ident">gtk</span>::<span class="ident">Button</span><span class="op">&gt;</span>().<span class="ident">is_ok</span>());</pre>
</div><h3 id='method.is' class='method'><span id='is.v' class='invisible'><code>fn <a href='#method.is' class='fnname'>is</a>&lt;T&gt;(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a> <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;Self: <a class="trait" href="../glib/object/trait.Downcast.html" title="trait glib::object::Downcast">Downcast</a>&lt;T&gt;,&nbsp;</span></code></span></h3><div class='docblock'><p>Returns <code>true</code> if the object is an instance of (can be downcast to) <code>T</code>.</p>
</div></div>
<h2 id='implementors'>Implementors</h2>
<ul class='item-list' id='implementors-list'>
<li><code>impl&lt;T&gt; Cast for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../gtk/trait.IsA.html" title="trait gtk::IsA">IsA</a>&lt;<a class="struct" href="../gtk/struct.Object.html" title="struct gtk::Object">Object</a>&gt;,&nbsp;</span></code></li>
</ul><script type="text/javascript" async
src="../implementors/glib/object/trait.Cast.js">
</script></section>
<section id='search' class="content hidden"></section>
<section class="footer"></section>
<aside id="help" class="hidden">
<div>
<h1 class="hidden">Help</h1>
<div class="shortcuts">
<h2>Keyboard Shortcuts</h2>
<dl>
<dt>?</dt>
<dd>Show this help dialog</dd>
<dt>S</dt>
<dd>Focus the search field</dd>
<dt>&larrb;</dt>
<dd>Move up in search results</dd>
<dt>&rarrb;</dt>
<dd>Move down in search results</dd>
<dt>&#9166;</dt>
<dd>Go to active search result</dd>
<dt>+</dt>
<dd>Collapse/expand all sections</dd>
</dl>
</div>
<div class="infos">
<h2>Search Tricks</h2>
<p>
Prefix searches with a type followed by a colon (e.g.
<code>fn:</code>) to restrict the search to a given type.
</p>
<p>
Accepted types are: <code>fn</code>, <code>mod</code>,
<code>struct</code>, <code>enum</code>,
<code>trait</code>, <code>type</code>, <code>macro</code>,
and <code>const</code>.
</p>
<p>
Search functions by type signature (e.g.
<code>vec -> usize</code> or <code>* -> vec</code>)
</p>
</div>
</div>
</aside>
<script>
window.rootPath = "../";
window.currentCrate = "gtk";
</script>
<script src="../main.js"></script>
<script defer src="../search-index.js"></script>
</body>
</html>
Reference in New Issue Copy Permalink