mentat/docs/apis/rust/tokio/prelude/stream/fn.repeat.html

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2018-06-21 14:44:35 +00:00
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<div class="sidebar-elems"><p class='location'><a href='../../index.html'>tokio</a>::<wbr><a href='../index.html'>prelude</a>::<wbr><a href='index.html'>stream</a></p><script>window.sidebarCurrent = {name: 'repeat', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<section id='main' class="content"><h1 class='fqn'><span class='in-band'>Function <a href='../../index.html'>tokio</a>::<wbr><a href='../index.html'>prelude</a>::<wbr><a href='index.html'>stream</a>::<wbr><a class="fn" href=''>repeat</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../../../src/futures/stream/repeat.rs.html#35-42' title='goto source code'>[src]</a></span></h1><pre class='rust fn'>pub fn repeat&lt;T, E&gt;(item: T) -&gt; <a class="struct" href="../../../tokio/prelude/stream/struct.Repeat.html" title="struct tokio::prelude::stream::Repeat">Repeat</a>&lt;T, E&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,&nbsp;</span></pre><div class='docblock'><p>Create a stream which produces the same item repeatedly.</p>
<p>Stream never produces an error or EOF. Note that you likely want to avoid
usage of <code>collect</code> or such on the returned stream as it will exhaust
available memory as it tries to just fill up all RAM.</p>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">futures</span>::<span class="kw-2">*</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">stream</span> <span class="op">=</span> <span class="ident">stream</span>::<span class="ident">repeat</span>::<span class="op">&lt;</span><span class="kw">_</span>, <span class="ident">bool</span><span class="op">&gt;</span>(<span class="number">10</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="number">10</span>))), <span class="ident">stream</span>.<span class="ident">poll</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="number">10</span>))), <span class="ident">stream</span>.<span class="ident">poll</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="prelude-val">Some</span>(<span class="number">10</span>))), <span class="ident">stream</span>.<span class="ident">poll</span>());</pre>
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