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<p class='location'>Trait FutureExt</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#provided-methods">Provided Methods</a><div class="sidebar-links"><a href="#method.deadline">deadline</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../index.html'>tokio</a>::<wbr><a href='index.html'>util</a></p><script>window.sidebarCurrent = {name: 'FutureExt', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Trait <a href='../index.html'>tokio</a>::<wbr><a href='index.html'>util</a>::<wbr><a class="trait" href=''>FutureExt</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</span><a class='srclink' href='../../src/tokio/util/future.rs.html#21-59' title='goto source code'>[src]</a></span></h1>
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<pre class='rust trait'>pub trait FutureExt: <a class="trait" href="../../tokio/prelude/future/trait.Future.html" title="trait tokio::prelude::future::Future">Future</a> {
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fn <a href='#method.deadline' class='fnname'>deadline</a>(self, deadline: <a class="struct" href="https://doc.rust-lang.org/nightly/std/time/struct.Instant.html" title="struct std::time::Instant">Instant</a>) -> <a class="struct" href="../../tokio/timer/struct.Deadline.html" title="struct tokio::timer::Deadline">Deadline</a><Self><br> <span class="where">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a></span>,
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{ ... }
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}</pre><div class='docblock'><p>An extension trait for <code>Future</code> that provides a variety of convenient
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combinator functions.</p>
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<p>Currently, there only is a <a href="#method.deadline"><code>deadline</code></a> function, but this will increase
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over time.</p>
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<p>Users are not expected to implement this trait. All types that implement
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<code>Future</code> already implement <code>FutureExt</code>.</p>
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<p>This trait can be imported directly or via the Tokio prelude: <code>use tokio::prelude::*</code>.</p>
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Provided Methods<a href='#provided-methods' class='anchor'></a>
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<h3 id='method.deadline' class='method'><span id='deadline.v' class='invisible'><code>fn <a href='#method.deadline' class='fnname'>deadline</a>(self, deadline: <a class="struct" href="https://doc.rust-lang.org/nightly/std/time/struct.Instant.html" title="struct std::time::Instant">Instant</a>) -> <a class="struct" href="../../tokio/timer/struct.Deadline.html" title="struct tokio::timer::Deadline">Deadline</a><Self> <span class="where fmt-newline">where<br> Self: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </span></code></span></h3><div class='docblock'><p>Creates a new future which allows <code>self</code> until <code>deadline</code>.</p>
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<p>This combinator creates a new future which wraps the receiving future
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with a deadline. The returned future is allowed to execute until it
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completes or <code>deadline</code> is reached, whichever happens first.</p>
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<p>If the future completes before <code>deadline</code> then the future will resolve
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with that item. Otherwise the future will resolve to an error once
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<code>deadline</code> is reached.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">tokio</span>::<span class="ident">prelude</span>::<span class="kw-2">*</span>;
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">time</span>::{<span class="ident">Duration</span>, <span class="ident">Instant</span>};
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<span class="kw">let</span> <span class="ident">future</span> <span class="op">=</span> <span class="ident">long_future</span>()
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.<span class="ident">deadline</span>(<span class="ident">Instant</span>::<span class="ident">now</span>() <span class="op">+</span> <span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">1</span>))
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.<span class="ident">map_err</span>(<span class="op">|</span><span class="ident">e</span><span class="op">|</span> <span class="macro">println</span><span class="macro">!</span>(<span class="string">"error = {:?}"</span>, <span class="ident">e</span>));
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<span class="ident">tokio</span>::<span class="ident">run</span>(<span class="ident">future</span>);</pre>
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<li><div class='out-of-band'><a class='srclink' href='../../src/tokio/util/future.rs.html#61' title='goto source code'>[src]</a></div><code>impl<T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> FutureExt for T <span class="where fmt-newline">where<br> T: <a class="trait" href="../../tokio/prelude/future/trait.Future.html" title="trait tokio::prelude::future::Future">Future</a>, </span></code></li>
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