151 lines
7.1 KiB
HTML
151 lines
7.1 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<meta name="description" content="API documentation for the Rust `Result` type in crate `tokio`.">
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<meta name="keywords" content="rust, rustlang, rust-lang, Result">
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<title>tokio::io::Result - Rust</title>
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<body class="rustdoc type">
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things.
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<div class="sidebar-menu">☰</div>
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<p class='location'>Type Definition Result</p><div class="sidebar-elems"><p class='location'><a href='../index.html'>tokio</a>::<wbr><a href='index.html'>io</a></p><script>window.sidebarCurrent = {name: 'Result', ty: 'type', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<section id='main' class="content">
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<h1 class='fqn'><span class='in-band'>Type Definition <a href='../index.html'>tokio</a>::<wbr><a href='index.html'>io</a>::<wbr><a class="type" href=''>Result</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version 1.0.0'>1.0.0</span><span id='render-detail'>
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[<span class='inner'>−</span>]
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</a>
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</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/io/error.rs.html#52' title='goto source code'>[src]</a></span></h1>
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<pre class='rust typedef'>type Result<T> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <a class="struct" href="../../tokio/io/struct.Error.html" title="struct tokio::io::Error">Error</a>>;</pre><div class='docblock'><p>A specialized <a href="../result/enum.Result.html"><code>Result</code></a> type for I/O
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operations.</p>
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<p>This type is broadly used across <a href="../io/index.html"><code>std::io</code></a> for any operation which may
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produce an error.</p>
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<p>This typedef is generally used to avoid writing out <a href="../io/struct.Error.html"><code>io::Error</code></a> directly and
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is otherwise a direct mapping to <a href="../result/enum.Result.html"><code>Result</code></a>.</p>
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<p>While usual Rust style is to import types directly, aliases of <a href="../result/enum.Result.html"><code>Result</code></a>
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often are not, to make it easier to distinguish between them. <a href="../result/enum.Result.html"><code>Result</code></a> is
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generally assumed to be <a href="../result/enum.Result.html"><code>std::result::Result</code></a>, and so users of this alias
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will generally use <code>io::Result</code> instead of shadowing the prelude's import
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of <a href="../result/enum.Result.html"><code>std::result::Result</code></a>.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<p>A convenience function that bubbles an <code>io::Result</code> to its caller:</p>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>;
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<span class="kw">fn</span> <span class="ident">get_string</span>() <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">String</span><span class="op">></span> {
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buffer</span> <span class="op">=</span> <span class="ident">String</span>::<span class="ident">new</span>();
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<span class="ident">io</span>::<span class="ident">stdin</span>().<span class="ident">read_line</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">buffer</span>)<span class="question-mark">?</span>;
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<span class="prelude-val">Ok</span>(<span class="ident">buffer</span>)
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}</pre>
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</div></section>
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<h1 class="hidden">Help</h1>
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Prefix searches with a type followed by a colon (e.g.
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Accepted types are: <code>fn</code>, <code>mod</code>,
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and <code>const</code>.
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Search functions by type signature (e.g.
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