140 lines
7.4 KiB
HTML
140 lines
7.4 KiB
HTML
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<!DOCTYPE html>
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<meta name="description" content="API documentation for the Rust `iter_result` fn in crate `futures`.">
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<meta name="keywords" content="rust, rustlang, rust-lang, iter_result">
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<title>futures::stream::iter_result - Rust</title>
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<p class='location'><a href='../index.html'>futures</a>::<wbr><a href='index.html'>stream</a></p><script>window.sidebarCurrent = {name: 'iter_result', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<section id='main' class="content">
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<h1 class='fqn'><span class='in-band'>Function <a href='../index.html'>futures</a>::<wbr><a href='index.html'>stream</a>::<wbr><a class="fn" href=''>iter_result</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../../src/futures/stream/iter_result.rs.html#28-35' title='goto source code'>[src]</a></span></h1>
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<pre class='rust fn'>pub fn iter_result<J, T, E>(i: J) -> <a class="struct" href="../../futures/stream/struct.IterResult.html" title="struct futures::stream::IterResult">IterResult</a><J::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html#associatedtype.IntoIter" title="type core::iter::traits::IntoIterator::IntoIter">IntoIter</a>> <span class="where fmt-newline">where<br> J: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html" title="trait core::iter::traits::IntoIterator">IntoIterator</a><Item = <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, E>>, </span></pre><div class='docblock'><p>Converts an <code>Iterator</code> over <code>Result</code>s into a <code>Stream</code> which is always ready
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to yield the next value.</p>
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<p>Iterators in Rust don't express the ability to block, so this adapter simply
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always calls <code>iter.next()</code> and returns that.</p>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">futures</span>::<span class="kw-2">*</span>;
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<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">iter_result</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="prelude-val">Ok</span>(<span class="number">17</span>), <span class="prelude-val">Err</span>(<span class="bool-val">false</span>), <span class="prelude-val">Ok</span>(<span class="number">19</span>)]);
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<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">17</span>))), <span class="ident">stream</span>.<span class="ident">poll</span>());
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Err</span>(<span class="bool-val">false</span>), <span class="ident">stream</span>.<span class="ident">poll</span>());
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<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">19</span>))), <span class="ident">stream</span>.<span class="ident">poll</span>());
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<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">None</span>)), <span class="ident">stream</span>.<span class="ident">poll</span>());</pre>
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Accepted types are: <code>fn</code>, <code>mod</code>,
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