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Update and fix
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<p class='location'>Trait Downcast</p><div class="block items"><ul><li><a href="#required-methods">Required Methods</a></li><li><a href="#implementors">Implementors</a></li></ul></div><p class='location'><a href='../index.html'>glib</a>::<wbr><a href='index.html'>object</a></p><script>window.sidebarCurrent = {name: 'Downcast', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<h1 class='fqn'><span class='in-band'>Trait <a href='../index.html'>glib</a>::<wbr><a href='index.html'>object</a>::<wbr><a class="trait" href=''>Downcast</a></span><span class='out-of-band'><span id='render-detail'>
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Update
2017-07-16 00:16:24 +00:00
</span><a class='srclink' href='../../src/glib/object.rs.html#86-99' 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 Downcast&lt;T&gt; {
fn <a href='#tymethod.can_downcast' class='fnname'>can_downcast</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>;
fn <a href='#tymethod.downcast' class='fnname'>downcast</a>(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="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a></span>;
unsafe fn <a href='#tymethod.downcast_unchecked' class='fnname'>downcast_unchecked</a>(self) -&gt; T;
}</pre><div class='docblock'><p>Downcasts support.</p>
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<h2 id='required-methods'>Required Methods</h2>
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<h3 id='tymethod.can_downcast' class='method'><span id='can_downcast.v' class='invisible'><code>fn <a href='#tymethod.can_downcast' class='fnname'>can_downcast</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></h3><div class='docblock'><p>Checks if it&#39;s possible to downcast to <code>T</code>.</p>
<p>Returns <code>true</code> if the instance implements <code>T</code> and <code>false</code> otherwise.</p>
</div><h3 id='tymethod.downcast' class='method'><span id='downcast.v' class='invisible'><code>fn <a href='#tymethod.downcast' class='fnname'>downcast</a>(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="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code></span></h3><div class='docblock'><p>Tries to downcast to <code>T</code>.</p>
<p>Returns <code>Ok(T)</code> if the instance implements <code>T</code> and <code>Err(Self)</code> otherwise.</p>
</div><h3 id='tymethod.downcast_unchecked' class='method'><span id='downcast_unchecked.v' class='invisible'><code>unsafe fn <a href='#tymethod.downcast_unchecked' class='fnname'>downcast_unchecked</a>(self) -&gt; T</code></span></h3><div class='docblock'><p>Downcasts to <code>T</code> unconditionally.</p>
<p>Panics if compiled with <code>debug_assertions</code> and the instance doesn&#39;t implement <code>T</code>.</p>
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<li><code>impl&lt;Super:&nbsp;<a class="trait" href="../../glib/object/trait.IsA.html" title="trait glib::object::IsA">IsA</a>&lt;Super&gt;, Sub:&nbsp;<a class="trait" href="../../glib/object/trait.IsA.html" title="trait glib::object::IsA">IsA</a>&lt;Super&gt;&gt; Downcast&lt;Sub&gt; for Super</code></li>
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