564 lines
168 KiB
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564 lines
168 KiB
HTML
<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `Result` enum in crate `nom`."><meta name="keywords" content="rust, rustlang, rust-lang, Result"><title>nom::lib::std::result::Result - Rust</title><link rel="stylesheet" type="text/css" href="../../../../normalize.css"><link rel="stylesheet" type="text/css" href="../../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../../../dark.css"><link rel="stylesheet" type="text/css" href="../../../../light.css" id="themeStyle"><script src="../../../../storage.js"></script><noscript><link rel="stylesheet" href="../../../../noscript.css"></noscript><link rel="shortcut icon" href="../../../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../../../down-arrow.svg");}</style></head><body class="rustdoc enum"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../../../nom/index.html'><div class='logo-container'><img src='../../../../rust-logo.png' alt='logo'></div></a><p class='location'>Enum Result</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#variants">Variants</a><div class="sidebar-links"><a href="#variant.Ok">Ok</a><a href="#variant.Err">Err</a></div><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.and">and</a><a href="#method.and_then">and_then</a><a href="#method.as_deref">as_deref</a><a href="#method.as_deref_err">as_deref_err</a><a href="#method.as_deref_mut">as_deref_mut</a><a href="#method.as_deref_mut_err">as_deref_mut_err</a><a href="#method.as_mut">as_mut</a><a href="#method.as_ref">as_ref</a><a href="#method.cloned">cloned</a><a href="#method.cloned-1">cloned</a><a href="#method.contains">contains</a><a href="#method.contains_err">contains_err</a><a href="#method.copied">copied</a><a href="#method.copied-1">copied</a><a href="#method.err">err</a><a href="#method.expect">expect</a><a href="#method.expect_err">expect_err</a><a href="#method.into_ok">into_ok</a><a href="#method.is_err">is_err</a><a href="#method.is_ok">is_ok</a><a href="#method.iter">iter</a><a href="#method.iter_mut">iter_mut</a><a href="#method.map">map</a><a href="#method.map_err">map_err</a><a href="#method.map_or">map_or</a><a href="#method.map_or_else">map_or_else</a><a href="#method.ok">ok</a><a href="#method.or">or</a><a href="#method.or_else">or_else</a><a href="#method.transpose">transpose</a><a href="#method.unwrap">unwrap</a><a href="#method.unwrap_err">unwrap_err</a><a href="#method.unwrap_or">unwrap_or</a><a href="#method.unwrap_or_default">unwrap_or_default</a><a href="#method.unwrap_or_else">unwrap_or_else</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Clone">Clone</a><a href="#impl-Copy">Copy</a><a href="#impl-Debug">Debug</a><a href="#impl-Eq">Eq</a><a href="#impl-FromIterator%3CResult%3CA%2C%20E%3E%3E">FromIterator<Result<A, E>></a><a href="#impl-Hash">Hash</a><a href="#impl-IntoIterator">IntoIterator</a><a href="#impl-Ord">Ord</a><a href="#impl-PartialEq%3CResult%3CT%2C%20E%3E%3E">PartialEq<Result<T, E>></a><a href="#impl-PartialOrd%3CResult%3CT%2C%20E%3E%3E">PartialOrd<Result<T, E>></a><a href="#impl-Product%3CResult%3CU%2C%20E%3E%3E">Product<Result<U, E>></a><a href="#impl-StructuralEq">StructuralEq</a><a href="#impl-StructuralPartialEq">StructuralPartialEq</a><a href="#impl-Sum%3CResult%3CU%2C%20E%3E%3E">Sum<Result<U, E>></a><a href="#impl-Termination">Termination</a><a href="#impl-Try">Try</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-RefUnwindSafe">RefUnwindSafe</a><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a><a href="#impl-Unpin">Unpin</a><a href="#impl-UnwindSafe">UnwindSafe</a></div><a class="sidebar-title" href="#blanket-implementations">Blanket Implementations</a><div class="sidebar-links"><a href="#impl-Any">Any</a><a href="#impl-Borrow%3CT%3E">Borrow<T></a><a href="#impl-BorrowMut%3CT%3E">BorrowMut<T></a><a href="#impl-From%3CT%3E">From<T></a><a href="#impl-Into%3CU%3E">Into<U></a><a href="#impl-IntoIterator">IntoIterator</a><a href="#impl-ToOwned">ToOwned</a><a href="#impl-TryFrom%3CU%3E">TryFrom<U></a><a href="#impl-TryInto%3CU%3E">TryInto<U></a></div></div><p class='location'><a href='../../../index.html'>nom</a>::<wbr><a href='../../index.html'>lib</a>::<wbr><a href='../index.html'>std</a>::<wbr><a href='index.html'>result</a></p><script>window.sidebarCurrent = {name: 'Result', ty: 'enum', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../../../settings.html"><img src="../../../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span class='since' title='Stable since Rust version 1.0.0'>1.0.0</span><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#247-255' title='goto source code'>[src]</a></span><span class='in-band'>Enum <a href='../../../index.html'>nom</a>::<wbr><a href='../../index.html'>lib</a>::<wbr><a href='../index.html'>std</a>::<wbr><a href='index.html'>result</a>::<wbr><a class="enum" href=''>Result</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class='rust enum'><span class="docblock attributes top-attr">#[must_use = "this `Result` may be an `Err` variant, which should be handled"]
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</span>pub enum Result<T, E> {
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Ok(T),
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Err(E),
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}</pre></div><div class='docblock'><p><code>Result</code> is a type that represents either success (<a href="enum.Result.html#variant.Ok"><code>Ok</code></a>) or failure (<a href="enum.Result.html#variant.Err"><code>Err</code></a>).</p>
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<p>See the <a href="index.html"><code>std::result</code></a> module documentation for details.</p>
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</div><h2 id='variants' class='variants small-section-header'>
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Variants<a href='#variants' class='anchor'></a></h2>
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<div id="variant.Ok" class="variant small-section-header"><a href="#variant.Ok" class="anchor field"></a><code id='Ok.v'>Ok(T)</code></div><div class='docblock'><p>Contains the success value</p>
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</div><div id="variant.Err" class="variant small-section-header"><a href="#variant.Err" class="anchor field"></a><code id='Err.v'>Err(E)</code></div><div class='docblock'><p>Contains the error value</p>
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</div><h2 id='methods' class='small-section-header'>Methods<a href='#methods' class='anchor'></a></h2><h3 id='impl' class='impl'><code class='in-band'>impl<T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a href='#impl' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#261-854' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.is_ok' class="method"><code id='is_ok.v'><span class="docblock attributes">#[must_use = "if you intended to assert that this is ok, consider `.unwrap()` instead"]
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</span>pub const fn <a href='#method.is_ok' class='fnname'>is_ok</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#285-287' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns <code>true</code> if the result is <a href="enum.Result.html#variant.Ok"><code>Ok</code></a>.</p>
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<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
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<p>Basic usage:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">i32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="op">-</span><span class="number">3</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">is_ok</span>(), <span class="bool-val">true</span>);
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">i32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"Some error message"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">is_ok</span>(), <span class="bool-val">false</span>);</pre></div>
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</div><h4 id='method.is_err' class="method"><code id='is_err.v'><span class="docblock attributes">#[must_use = "if you intended to assert that this is err, consider `.unwrap_err()` instead"]
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</span>pub const fn <a href='#method.is_err' class='fnname'>is_err</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#308-310' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns <code>true</code> if the result is <a href="enum.Result.html#variant.Err"><code>Err</code></a>.</p>
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<h1 id="examples-1" class="section-header"><a href="#examples-1">Examples</a></h1>
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<p>Basic usage:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">i32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="op">-</span><span class="number">3</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">is_err</span>(), <span class="bool-val">false</span>);
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">i32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"Some error message"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">is_err</span>(), <span class="bool-val">true</span>);</pre></div>
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</div><h4 id='method.contains' class="method"><code id='contains.v'><span class="docblock attributes">#[must_use]
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</span>pub fn <a href='#method.contains' class='fnname'>contains</a><U>(&self, x: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>U) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a> <span class="where fmt-newline">where<br> U: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialEq.html" title="trait nom::lib::std::prelude::v1::v1::PartialEq">PartialEq</a><T>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#331-339' title='goto source code'>[src]</a></h4><div class='stability'><div class='stab unstable'><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>option_result_contains</code>)</div></div><div class='docblock'><p>Returns <code>true</code> if the result is an [<code>Ok</code>] value containing the given value.</p>
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<h1 id="examples-2" class="section-header"><a href="#examples-2">Examples</a></h1>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="attribute">#![<span class="ident">feature</span>(<span class="ident">option_result_contains</span>)]</span>
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">contains</span>(<span class="kw-2">&</span><span class="number">2</span>), <span class="bool-val">true</span>);
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">3</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">contains</span>(<span class="kw-2">&</span><span class="number">2</span>), <span class="bool-val">false</span>);
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"Some error message"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">contains</span>(<span class="kw-2">&</span><span class="number">2</span>), <span class="bool-val">false</span>);</pre></div>
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</div><h4 id='method.contains_err' class="method"><code id='contains_err.v'><span class="docblock attributes">#[must_use]
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</span>pub fn <a href='#method.contains_err' class='fnname'>contains_err</a><F>(&self, f: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>F) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a> <span class="where fmt-newline">where<br> F: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialEq.html" title="trait nom::lib::std::prelude::v1::v1::PartialEq">PartialEq</a><E>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#360-368' title='goto source code'>[src]</a></h4><div class='stability'><div class='stab unstable'><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>result_contains_err</code>)</div></div><div class='docblock'><p>Returns <code>true</code> if the result is an [<code>Err</code>] value containing the given value.</p>
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<h1 id="examples-3" class="section-header"><a href="#examples-3">Examples</a></h1>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="attribute">#![<span class="ident">feature</span>(<span class="ident">result_contains_err</span>)]</span>
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">contains_err</span>(<span class="kw-2">&</span><span class="string">"Some error message"</span>), <span class="bool-val">false</span>);
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"Some error message"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">contains_err</span>(<span class="kw-2">&</span><span class="string">"Some error message"</span>), <span class="bool-val">true</span>);
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"Some other error message"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">contains_err</span>(<span class="kw-2">&</span><span class="string">"Some error message"</span>), <span class="bool-val">false</span>);</pre></div>
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</div><h4 id='method.ok' class="method"><code id='ok.v'>pub fn <a href='#method.ok' class='fnname'>ok</a>(self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Option.html" title="enum nom::lib::std::prelude::v1::v1::Option">Option</a><T></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#394-399' title='goto source code'>[src]</a></h4><div class='docblock'><p>Converts from <code>Result<T, E></code> to <a href="../../std/option/enum.Option.html"><code>Option<T></code></a>.</p>
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<p>Converts <code>self</code> into an <a href="../../std/option/enum.Option.html"><code>Option<T></code></a>, consuming <code>self</code>,
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and discarding the error, if any.</p>
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<h1 id="examples-4" class="section-header"><a href="#examples-4">Examples</a></h1>
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<p>Basic usage:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">ok</span>(), <span class="prelude-val">Some</span>(<span class="number">2</span>));
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"Nothing here"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">ok</span>(), <span class="prelude-val">None</span>);</pre></div>
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</div><h4 id='method.err' class="method"><code id='err.v'>pub fn <a href='#method.err' class='fnname'>err</a>(self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Option.html" title="enum nom::lib::std::prelude::v1::v1::Option">Option</a><E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#421-426' title='goto source code'>[src]</a></h4><div class='docblock'><p>Converts from <code>Result<T, E></code> to <a href="../../std/option/enum.Option.html"><code>Option<E></code></a>.</p>
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<p>Converts <code>self</code> into an <a href="../../std/option/enum.Option.html"><code>Option<E></code></a>, consuming <code>self</code>,
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and discarding the success value, if any.</p>
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<h1 id="examples-5" class="section-header"><a href="#examples-5">Examples</a></h1>
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<p>Basic usage:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">err</span>(), <span class="prelude-val">None</span>);
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<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"Nothing here"</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">err</span>(), <span class="prelude-val">Some</span>(<span class="string">"Nothing here"</span>));</pre></div>
|
||
</div><h4 id='method.as_ref' class="method"><code id='as_ref.v'>pub const fn <a href='#method.as_ref' class='fnname'>as_ref</a>(&self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#451-456' title='goto source code'>[src]</a></h4><div class='docblock'><p>Converts from <code>&Result<T, E></code> to <code>Result<&T, &E></code>.</p>
|
||
<p>Produces a new <code>Result</code>, containing a reference
|
||
into the original, leaving the original in place.</p>
|
||
<h1 id="examples-6" class="section-header"><a href="#examples-6">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">as_ref</span>(), <span class="prelude-val">Ok</span>(<span class="kw-2">&</span><span class="number">2</span>));
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"Error"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">as_ref</span>(), <span class="prelude-val">Err</span>(<span class="kw-2">&</span><span class="string">"Error"</span>));</pre></div>
|
||
</div><h4 id='method.as_mut' class="method"><code id='as_mut.v'>pub fn <a href='#method.as_mut' class='fnname'>as_mut</a>(&mut self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#482-487' title='goto source code'>[src]</a></h4><div class='docblock'><p>Converts from <code>&mut Result<T, E></code> to <code>Result<&mut T, &mut E></code>.</p>
|
||
<h1 id="examples-7" class="section-header"><a href="#examples-7">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">fn</span> <span class="ident">mutate</span>(<span class="ident">r</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">i32</span>, <span class="ident">i32</span><span class="op">></span>) {
|
||
<span class="kw">match</span> <span class="ident">r</span>.<span class="ident">as_mut</span>() {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">v</span>) <span class="op">=</span><span class="op">></span> <span class="kw-2">*</span><span class="ident">v</span> <span class="op">=</span> <span class="number">42</span>,
|
||
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=</span><span class="op">></span> <span class="kw-2">*</span><span class="ident">e</span> <span class="op">=</span> <span class="number">0</span>,
|
||
}
|
||
}
|
||
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">i32</span>, <span class="ident">i32</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
|
||
<span class="ident">mutate</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">x</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">unwrap</span>(), <span class="number">42</span>);
|
||
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">i32</span>, <span class="ident">i32</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="number">13</span>);
|
||
<span class="ident">mutate</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">x</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">unwrap_err</span>(), <span class="number">0</span>);</pre></div>
|
||
</div><h4 id='method.map' class="method"><code id='map.v'>pub fn <a href='#method.map' class='fnname'>map</a><U, F>(self, op: F) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><U, E> <span class="where fmt-newline">where<br> F: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.FnOnce.html" title="trait nom::lib::std::prelude::v1::v1::FnOnce">FnOnce</a>(T) -> U, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#517-522' title='goto source code'>[src]</a></h4><div class='docblock'><p>Maps a <code>Result<T, E></code> to <code>Result<U, E></code> by applying a function to a
|
||
contained <a href="enum.Result.html#variant.Ok"><code>Ok</code></a> value, leaving an <a href="enum.Result.html#variant.Err"><code>Err</code></a> value untouched.</p>
|
||
<p>This function can be used to compose the results of two functions.</p>
|
||
<h1 id="examples-8" class="section-header"><a href="#examples-8">Examples</a></h1>
|
||
<p>Print the numbers on each line of a string multiplied by two.</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">line</span> <span class="op">=</span> <span class="string">"1\n2\n3\n4\n"</span>;
|
||
|
||
<span class="kw">for</span> <span class="ident">num</span> <span class="kw">in</span> <span class="ident">line</span>.<span class="ident">lines</span>() {
|
||
<span class="kw">match</span> <span class="ident">num</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="ident">i32</span><span class="op">></span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">i</span><span class="op">|</span> <span class="ident">i</span> <span class="op">*</span> <span class="number">2</span>) {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">n</span>) <span class="op">=</span><span class="op">></span> <span class="macro">println</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">n</span>),
|
||
<span class="prelude-val">Err</span>(..) <span class="op">=</span><span class="op">></span> {}
|
||
}
|
||
}</pre></div>
|
||
</div><h4 id='method.map_or' class="method"><code id='map_or.v'>pub fn <a href='#method.map_or' class='fnname'>map_or</a><U, F>(self, default: U, f: F) -> U <span class="where fmt-newline">where<br> F: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.FnOnce.html" title="trait nom::lib::std::prelude::v1::v1::FnOnce">FnOnce</a>(T) -> U, </span></code><span class='since' title='Stable since Rust version 1.41.0'>1.41.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#544-549' title='goto source code'>[src]</a></h4><div class='docblock'><p>Applies a function to the contained value (if any),
|
||
or returns the provided default (if not).</p>
|
||
<p>Arguments passed to <code>map_or</code> are eagerly evaluated; if you are passing
|
||
the result of a function call, it is recommended to use <a href="#method.map_or_else"><code>map_or_else</code></a>,
|
||
which is lazily evaluated.</p>
|
||
<h1 id="examples-9" class="section-header"><a href="#examples-9">Examples</a></h1>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw">_</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="string">"foo"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">map_or</span>(<span class="number">42</span>, <span class="op">|</span><span class="ident">v</span><span class="op">|</span> <span class="ident">v</span>.<span class="ident">len</span>()), <span class="number">3</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span>, <span class="kw">_</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"bar"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">map_or</span>(<span class="number">42</span>, <span class="op">|</span><span class="ident">v</span><span class="op">|</span> <span class="ident">v</span>.<span class="ident">len</span>()), <span class="number">42</span>);</pre></div>
|
||
</div><h4 id='method.map_or_else' class="method"><code id='map_or_else.v'>pub fn <a href='#method.map_or_else' class='fnname'>map_or_else</a><U, D, F>(self, default: D, f: F) -> U <span class="where fmt-newline">where<br> D: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.FnOnce.html" title="trait nom::lib::std::prelude::v1::v1::FnOnce">FnOnce</a>(E) -> U,<br> F: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.FnOnce.html" title="trait nom::lib::std::prelude::v1::v1::FnOnce">FnOnce</a>(T) -> U, </span></code><span class='since' title='Stable since Rust version 1.41.0'>1.41.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#576-581' title='goto source code'>[src]</a></h4><div class='docblock'><p>Maps a <code>Result<T, E></code> to <code>U</code> by applying a function to a
|
||
contained <a href="enum.Result.html#variant.Ok"><code>Ok</code></a> value, or a fallback function to a
|
||
contained <a href="enum.Result.html#variant.Err"><code>Err</code></a> value.</p>
|
||
<p>This function can be used to unpack a successful result
|
||
while handling an error.</p>
|
||
<h1 id="examples-10" class="section-header"><a href="#examples-10">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">k</span> <span class="op">=</span> <span class="number">21</span>;
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span> : <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw">_</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="string">"foo"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">map_or_else</span>(<span class="op">|</span><span class="ident">e</span><span class="op">|</span> <span class="ident">k</span> <span class="op">*</span> <span class="number">2</span>, <span class="op">|</span><span class="ident">v</span><span class="op">|</span> <span class="ident">v</span>.<span class="ident">len</span>()), <span class="number">3</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span> : <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span>, <span class="kw">_</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"bar"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">map_or_else</span>(<span class="op">|</span><span class="ident">e</span><span class="op">|</span> <span class="ident">k</span> <span class="op">*</span> <span class="number">2</span>, <span class="op">|</span><span class="ident">v</span><span class="op">|</span> <span class="ident">v</span>.<span class="ident">len</span>()), <span class="number">42</span>);</pre></div>
|
||
</div><h4 id='method.map_err' class="method"><code id='map_err.v'>pub fn <a href='#method.map_err' class='fnname'>map_err</a><F, O>(self, op: O) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, F> <span class="where fmt-newline">where<br> O: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.FnOnce.html" title="trait nom::lib::std::prelude::v1::v1::FnOnce">FnOnce</a>(E) -> F, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#607-612' title='goto source code'>[src]</a></h4><div class='docblock'><p>Maps a <code>Result<T, E></code> to <code>Result<T, F></code> by applying a function to a
|
||
contained <a href="enum.Result.html#variant.Err"><code>Err</code></a> value, leaving an <a href="enum.Result.html#variant.Ok"><code>Ok</code></a> value untouched.</p>
|
||
<p>This function can be used to pass through a successful result while handling
|
||
an error.</p>
|
||
<h1 id="examples-11" class="section-header"><a href="#examples-11">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">fn</span> <span class="ident">stringify</span>(<span class="ident">x</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="ident">String</span> { <span class="macro">format</span><span class="macro">!</span>(<span class="string">"error code: {}"</span>, <span class="ident">x</span>) }
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="ident">u32</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">map_err</span>(<span class="ident">stringify</span>), <span class="prelude-val">Ok</span>(<span class="number">2</span>));
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="ident">u32</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="number">13</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">map_err</span>(<span class="ident">stringify</span>), <span class="prelude-val">Err</span>(<span class="string">"error code: 13"</span>.<span class="ident">to_string</span>()));</pre></div>
|
||
</div><h4 id='method.iter' class="method"><code id='iter.v'>pub fn <a href='#method.iter' class='fnname'>iter</a>(&self) -> <a class="struct" href="../../../../nom/lib/std/result/struct.Iter.html" title="struct nom::lib::std::result::Iter">Iter</a><T></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#635-637' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns an iterator over the possibly contained value.</p>
|
||
<p>The iterator yields one value if the result is [<code>Result::Ok</code>], otherwise none.</p>
|
||
<h1 id="examples-12" class="section-header"><a href="#examples-12">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">7</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">iter</span>().<span class="ident">next</span>(), <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="number">7</span>));
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"nothing!"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">iter</span>().<span class="ident">next</span>(), <span class="prelude-val">None</span>);</pre></div>
|
||
</div><h4 id='method.iter_mut' class="method"><code id='iter_mut.v'>pub fn <a href='#method.iter_mut' class='fnname'>iter_mut</a>(&mut self) -> <a class="struct" href="../../../../nom/lib/std/result/struct.IterMut.html" title="struct nom::lib::std::result::IterMut">IterMut</a><T></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#660-662' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns a mutable iterator over the possibly contained value.</p>
|
||
<p>The iterator yields one value if the result is [<code>Result::Ok</code>], otherwise none.</p>
|
||
<h1 id="examples-13" class="section-header"><a href="#examples-13">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">7</span>);
|
||
<span class="kw">match</span> <span class="ident">x</span>.<span class="ident">iter_mut</span>().<span class="ident">next</span>() {
|
||
<span class="prelude-val">Some</span>(<span class="ident">v</span>) <span class="op">=</span><span class="op">></span> <span class="kw-2">*</span><span class="ident">v</span> <span class="op">=</span> <span class="number">40</span>,
|
||
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> {},
|
||
}
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="prelude-val">Ok</span>(<span class="number">40</span>));
|
||
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"nothing!"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">iter_mut</span>().<span class="ident">next</span>(), <span class="prelude-val">None</span>);</pre></div>
|
||
</div><h4 id='method.and' class="method"><code id='and.v'>pub fn <a href='#method.and' class='fnname'>and</a><U>(self, res: <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><U, E>) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><U, E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#696-701' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns <code>res</code> if the result is <a href="enum.Result.html#variant.Ok"><code>Ok</code></a>, otherwise returns the <a href="enum.Result.html#variant.Err"><code>Err</code></a> value of <code>self</code>.</p>
|
||
<h1 id="examples-14" class="section-header"><a href="#examples-14">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
|
||
<span class="kw">let</span> <span class="ident">y</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"late error"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">and</span>(<span class="ident">y</span>), <span class="prelude-val">Err</span>(<span class="string">"late error"</span>));
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"early error"</span>);
|
||
<span class="kw">let</span> <span class="ident">y</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="string">"foo"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">and</span>(<span class="ident">y</span>), <span class="prelude-val">Err</span>(<span class="string">"early error"</span>));
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"not a 2"</span>);
|
||
<span class="kw">let</span> <span class="ident">y</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"late error"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">and</span>(<span class="ident">y</span>), <span class="prelude-val">Err</span>(<span class="string">"not a 2"</span>));
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
|
||
<span class="kw">let</span> <span class="ident">y</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="string">"different result type"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">and</span>(<span class="ident">y</span>), <span class="prelude-val">Ok</span>(<span class="string">"different result type"</span>));</pre></div>
|
||
</div><h4 id='method.and_then' class="method"><code id='and_then.v'>pub fn <a href='#method.and_then' class='fnname'>and_then</a><U, F>(self, op: F) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><U, E> <span class="where fmt-newline">where<br> F: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.FnOnce.html" title="trait nom::lib::std::prelude::v1::v1::FnOnce">FnOnce</a>(T) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><U, E>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#725-730' title='goto source code'>[src]</a></h4><div class='docblock'><p>Calls <code>op</code> if the result is <a href="enum.Result.html#variant.Ok"><code>Ok</code></a>, otherwise returns the <a href="enum.Result.html#variant.Err"><code>Err</code></a> value of <code>self</code>.</p>
|
||
<p>This function can be used for control flow based on <code>Result</code> values.</p>
|
||
<h1 id="examples-15" class="section-header"><a href="#examples-15">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">fn</span> <span class="ident">sq</span>(<span class="ident">x</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="ident">u32</span><span class="op">></span> { <span class="prelude-val">Ok</span>(<span class="ident">x</span> <span class="op">*</span> <span class="ident">x</span>) }
|
||
<span class="kw">fn</span> <span class="ident">err</span>(<span class="ident">x</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="ident">u32</span><span class="op">></span> { <span class="prelude-val">Err</span>(<span class="ident">x</span>) }
|
||
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Ok</span>(<span class="number">2</span>).<span class="ident">and_then</span>(<span class="ident">sq</span>).<span class="ident">and_then</span>(<span class="ident">sq</span>), <span class="prelude-val">Ok</span>(<span class="number">16</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Ok</span>(<span class="number">2</span>).<span class="ident">and_then</span>(<span class="ident">sq</span>).<span class="ident">and_then</span>(<span class="ident">err</span>), <span class="prelude-val">Err</span>(<span class="number">4</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Ok</span>(<span class="number">2</span>).<span class="ident">and_then</span>(<span class="ident">err</span>).<span class="ident">and_then</span>(<span class="ident">sq</span>), <span class="prelude-val">Err</span>(<span class="number">2</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Err</span>(<span class="number">3</span>).<span class="ident">and_then</span>(<span class="ident">sq</span>).<span class="ident">and_then</span>(<span class="ident">sq</span>), <span class="prelude-val">Err</span>(<span class="number">3</span>));</pre></div>
|
||
</div><h4 id='method.or' class="method"><code id='or.v'>pub fn <a href='#method.or' class='fnname'>or</a><F>(self, res: <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, F>) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, F></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#765-770' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns <code>res</code> if the result is <a href="enum.Result.html#variant.Err"><code>Err</code></a>, otherwise returns the <a href="enum.Result.html#variant.Ok"><code>Ok</code></a> value of <code>self</code>.</p>
|
||
<p>Arguments passed to <code>or</code> are eagerly evaluated; if you are passing the
|
||
result of a function call, it is recommended to use <a href="#method.or_else"><code>or_else</code></a>, which is
|
||
lazily evaluated.</p>
|
||
<h1 id="examples-16" class="section-header"><a href="#examples-16">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
|
||
<span class="kw">let</span> <span class="ident">y</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"late error"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">or</span>(<span class="ident">y</span>), <span class="prelude-val">Ok</span>(<span class="number">2</span>));
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"early error"</span>);
|
||
<span class="kw">let</span> <span class="ident">y</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">or</span>(<span class="ident">y</span>), <span class="prelude-val">Ok</span>(<span class="number">2</span>));
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"not a 2"</span>);
|
||
<span class="kw">let</span> <span class="ident">y</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"late error"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">or</span>(<span class="ident">y</span>), <span class="prelude-val">Err</span>(<span class="string">"late error"</span>));
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
|
||
<span class="kw">let</span> <span class="ident">y</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">100</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">or</span>(<span class="ident">y</span>), <span class="prelude-val">Ok</span>(<span class="number">2</span>));</pre></div>
|
||
</div><h4 id='method.or_else' class="method"><code id='or_else.v'>pub fn <a href='#method.or_else' class='fnname'>or_else</a><F, O>(self, op: O) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, F> <span class="where fmt-newline">where<br> O: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.FnOnce.html" title="trait nom::lib::std::prelude::v1::v1::FnOnce">FnOnce</a>(E) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, F>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#794-799' title='goto source code'>[src]</a></h4><div class='docblock'><p>Calls <code>op</code> if the result is <a href="enum.Result.html#variant.Err"><code>Err</code></a>, otherwise returns the <a href="enum.Result.html#variant.Ok"><code>Ok</code></a> value of <code>self</code>.</p>
|
||
<p>This function can be used for control flow based on result values.</p>
|
||
<h1 id="examples-17" class="section-header"><a href="#examples-17">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">fn</span> <span class="ident">sq</span>(<span class="ident">x</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="ident">u32</span><span class="op">></span> { <span class="prelude-val">Ok</span>(<span class="ident">x</span> <span class="op">*</span> <span class="ident">x</span>) }
|
||
<span class="kw">fn</span> <span class="ident">err</span>(<span class="ident">x</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="ident">u32</span><span class="op">></span> { <span class="prelude-val">Err</span>(<span class="ident">x</span>) }
|
||
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Ok</span>(<span class="number">2</span>).<span class="ident">or_else</span>(<span class="ident">sq</span>).<span class="ident">or_else</span>(<span class="ident">sq</span>), <span class="prelude-val">Ok</span>(<span class="number">2</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Ok</span>(<span class="number">2</span>).<span class="ident">or_else</span>(<span class="ident">err</span>).<span class="ident">or_else</span>(<span class="ident">sq</span>), <span class="prelude-val">Ok</span>(<span class="number">2</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Err</span>(<span class="number">3</span>).<span class="ident">or_else</span>(<span class="ident">sq</span>).<span class="ident">or_else</span>(<span class="ident">err</span>), <span class="prelude-val">Ok</span>(<span class="number">9</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Err</span>(<span class="number">3</span>).<span class="ident">or_else</span>(<span class="ident">err</span>).<span class="ident">or_else</span>(<span class="ident">err</span>), <span class="prelude-val">Err</span>(<span class="number">3</span>));</pre></div>
|
||
</div><h4 id='method.unwrap_or' class="method"><code id='unwrap_or.v'>pub fn <a href='#method.unwrap_or' class='fnname'>unwrap_or</a>(self, default: T) -> T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#825-830' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns the contained <a href="enum.Result.html#variant.Ok"><code>Ok</code></a> value or a provided default.</p>
|
||
<p>Arguments passed to <code>unwrap_or</code> are eagerly evaluated; if you are passing
|
||
the result of a function call, it is recommended to use <a href="#method.unwrap_or_else"><code>unwrap_or_else</code></a>,
|
||
which is lazily evaluated.</p>
|
||
<h1 id="examples-18" class="section-header"><a href="#examples-18">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">default</span> <span class="op">=</span> <span class="number">2</span>;
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">9</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">unwrap_or</span>(<span class="ident">default</span>), <span class="number">9</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"error"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">unwrap_or</span>(<span class="ident">default</span>), <span class="ident">default</span>);</pre></div>
|
||
</div><h4 id='method.unwrap_or_else' class="method"><code id='unwrap_or_else.v'>pub fn <a href='#method.unwrap_or_else' class='fnname'>unwrap_or_else</a><F>(self, op: F) -> T <span class="where fmt-newline">where<br> F: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.FnOnce.html" title="trait nom::lib::std::prelude::v1::v1::FnOnce">FnOnce</a>(E) -> T, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#848-853' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns the contained <a href="enum.Result.html#variant.Ok"><code>Ok</code></a> value or computes it from a closure.</p>
|
||
<h1 id="examples-19" class="section-header"><a href="#examples-19">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">fn</span> <span class="ident">count</span>(<span class="ident">x</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-</span><span class="op">></span> <span class="ident">usize</span> { <span class="ident">x</span>.<span class="ident">len</span>() }
|
||
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Ok</span>(<span class="number">2</span>).<span class="ident">unwrap_or_else</span>(<span class="ident">count</span>), <span class="number">2</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="prelude-val">Err</span>(<span class="string">"foo"</span>).<span class="ident">unwrap_or_else</span>(<span class="ident">count</span>), <span class="number">3</span>);</pre></div>
|
||
</div></div><h3 id='impl-1' class='impl'><code class='in-band'>impl<'_, T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'_ </a>T, E> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Copy.html" title="trait nom::lib::std::prelude::v1::v1::Copy">Copy</a>, </span></code><a href='#impl-1' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#856-874' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.copied' class="method"><code id='copied.v'>pub fn <a href='#method.copied' class='fnname'>copied</a>(self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#871-873' title='goto source code'>[src]</a></h4><div class='stability'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>result_copied</code>)</summary><p>newly added</p>
|
||
</details></div></div><div class='docblock'><p>Maps a <code>Result<&T, E></code> to a <code>Result<T, E></code> by copying the contents of the
|
||
<code>Ok</code> part.</p>
|
||
<h1 id="examples-20" class="section-header"><a href="#examples-20">Examples</a></h1>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="attribute">#![<span class="ident">feature</span>(<span class="ident">result_copied</span>)]</span>
|
||
<span class="kw">let</span> <span class="ident">val</span> <span class="op">=</span> <span class="number">12</span>;
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">i32</span>, <span class="ident">i32</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="kw-2">&</span><span class="ident">val</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="prelude-val">Ok</span>(<span class="kw-2">&</span><span class="number">12</span>));
|
||
<span class="kw">let</span> <span class="ident">copied</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">copied</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">copied</span>, <span class="prelude-val">Ok</span>(<span class="number">12</span>));</pre></div>
|
||
</div></div><h3 id='impl-2' class='impl'><code class='in-band'>impl<'_, T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'_ mut </a>T, E> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Copy.html" title="trait nom::lib::std::prelude::v1::v1::Copy">Copy</a>, </span></code><a href='#impl-2' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#876-894' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.copied-1' class="method"><code id='copied.v-1'>pub fn <a href='#method.copied-1' class='fnname'>copied</a>(self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#891-893' title='goto source code'>[src]</a></h4><div class='stability'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>result_copied</code>)</summary><p>newly added</p>
|
||
</details></div></div><div class='docblock'><p>Maps a <code>Result<&mut T, E></code> to a <code>Result<T, E></code> by copying the contents of the
|
||
<code>Ok</code> part.</p>
|
||
<h1 id="examples-21" class="section-header"><a href="#examples-21">Examples</a></h1>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="attribute">#![<span class="ident">feature</span>(<span class="ident">result_copied</span>)]</span>
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">val</span> <span class="op">=</span> <span class="number">12</span>;
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">i32</span>, <span class="ident">i32</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">val</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="prelude-val">Ok</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="number">12</span>));
|
||
<span class="kw">let</span> <span class="ident">copied</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">copied</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">copied</span>, <span class="prelude-val">Ok</span>(<span class="number">12</span>));</pre></div>
|
||
</div></div><h3 id='impl-3' class='impl'><code class='in-band'>impl<'_, T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'_ </a>T, E> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Clone.html" title="trait nom::lib::std::prelude::v1::v1::Clone">Clone</a>, </span></code><a href='#impl-3' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#896-914' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.cloned' class="method"><code id='cloned.v'>pub fn <a href='#method.cloned' class='fnname'>cloned</a>(self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#911-913' title='goto source code'>[src]</a></h4><div class='stability'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>result_cloned</code>)</summary><p>newly added</p>
|
||
</details></div></div><div class='docblock'><p>Maps a <code>Result<&T, E></code> to a <code>Result<T, E></code> by cloning the contents of the
|
||
<code>Ok</code> part.</p>
|
||
<h1 id="examples-22" class="section-header"><a href="#examples-22">Examples</a></h1>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="attribute">#![<span class="ident">feature</span>(<span class="ident">result_cloned</span>)]</span>
|
||
<span class="kw">let</span> <span class="ident">val</span> <span class="op">=</span> <span class="number">12</span>;
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">i32</span>, <span class="ident">i32</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="kw-2">&</span><span class="ident">val</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="prelude-val">Ok</span>(<span class="kw-2">&</span><span class="number">12</span>));
|
||
<span class="kw">let</span> <span class="ident">cloned</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">cloned</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">cloned</span>, <span class="prelude-val">Ok</span>(<span class="number">12</span>));</pre></div>
|
||
</div></div><h3 id='impl-4' class='impl'><code class='in-band'>impl<'_, T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'_ mut </a>T, E> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Clone.html" title="trait nom::lib::std::prelude::v1::v1::Clone">Clone</a>, </span></code><a href='#impl-4' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#916-934' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.cloned-1' class="method"><code id='cloned.v-1'>pub fn <a href='#method.cloned-1' class='fnname'>cloned</a>(self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#931-933' title='goto source code'>[src]</a></h4><div class='stability'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>result_cloned</code>)</summary><p>newly added</p>
|
||
</details></div></div><div class='docblock'><p>Maps a <code>Result<&mut T, E></code> to a <code>Result<T, E></code> by cloning the contents of the
|
||
<code>Ok</code> part.</p>
|
||
<h1 id="examples-23" class="section-header"><a href="#examples-23">Examples</a></h1>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="attribute">#![<span class="ident">feature</span>(<span class="ident">result_cloned</span>)]</span>
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">val</span> <span class="op">=</span> <span class="number">12</span>;
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">i32</span>, <span class="ident">i32</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">val</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>, <span class="prelude-val">Ok</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="number">12</span>));
|
||
<span class="kw">let</span> <span class="ident">cloned</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">cloned</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">cloned</span>, <span class="prelude-val">Ok</span>(<span class="number">12</span>));</pre></div>
|
||
</div></div><h3 id='impl-5' class='impl'><code class='in-band'>impl<T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/fmt/trait.Debug.html" title="trait nom::lib::std::fmt::Debug">Debug</a>, </span></code><a href='#impl-5' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#936-1006' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.expect' class="method"><code id='expect.v'>pub fn <a href='#method.expect' class='fnname'>expect</a>(self, msg: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> T</code><span class='since' title='Stable since Rust version 1.4.0'>1.4.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#958-963' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns the contained <a href="enum.Result.html#variant.Ok"><code>Ok</code></a> value, consuming the <code>self</code> value.</p>
|
||
<h1 id="panics" class="section-header"><a href="#panics">Panics</a></h1>
|
||
<p>Panics if the value is an <a href="enum.Result.html#variant.Err"><code>Err</code></a>, with a panic message including the
|
||
passed message, and the content of the <a href="enum.Result.html#variant.Err"><code>Err</code></a>.</p>
|
||
<h1 id="examples-24" class="section-header"><a href="#examples-24">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"emergency failure"</span>);
|
||
<span class="ident">x</span>.<span class="ident">expect</span>(<span class="string">"Testing expect"</span>); <span class="comment">// panics with `Testing expect: emergency failure`</span></pre></div>
|
||
</div><h4 id='method.unwrap' class="method"><code id='unwrap.v'>pub fn <a href='#method.unwrap' class='fnname'>unwrap</a>(self) -> T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1000-1005' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns the contained <a href="enum.Result.html#variant.Ok"><code>Ok</code></a> value, consuming the <code>self</code> value.</p>
|
||
<p>Because this function may panic, its use is generally discouraged.
|
||
Instead, prefer to use pattern matching and handle the <a href="enum.Result.html#variant.Err"><code>Err</code></a>
|
||
case explicitly, or call <a href="#method.unwrap_or"><code>unwrap_or</code></a>, <a href="#method.unwrap_or_else"><code>unwrap_or_else</code></a>, or
|
||
<a href="#method.unwrap_or_default"><code>unwrap_or_default</code></a>.</p>
|
||
<h1 id="panics-1" class="section-header"><a href="#panics-1">Panics</a></h1>
|
||
<p>Panics if the value is an <a href="enum.Result.html#variant.Err"><code>Err</code></a>, with a panic message provided by the
|
||
<a href="enum.Result.html#variant.Err"><code>Err</code></a>'s value.</p>
|
||
<h1 id="examples-25" class="section-header"><a href="#examples-25">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">unwrap</span>(), <span class="number">2</span>);</pre></div>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"emergency failure"</span>);
|
||
<span class="ident">x</span>.<span class="ident">unwrap</span>(); <span class="comment">// panics with `emergency failure`</span></pre></div>
|
||
</div></div><h3 id='impl-6' class='impl'><code class='in-band'>impl<T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../../../nom/lib/std/fmt/trait.Debug.html" title="trait nom::lib::std::fmt::Debug">Debug</a>, </span></code><a href='#impl-6' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1008-1068' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.expect_err' class="method"><code id='expect_err.v'>pub fn <a href='#method.expect_err' class='fnname'>expect_err</a>(self, msg: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> E</code><span class='since' title='Stable since Rust version 1.17.0'>1.17.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1030-1035' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns the contained <a href="enum.Result.html#variant.Err"><code>Err</code></a> value, consuming the <code>self</code> value.</p>
|
||
<h1 id="panics-2" class="section-header"><a href="#panics-2">Panics</a></h1>
|
||
<p>Panics if the value is an <a href="enum.Result.html#variant.Ok"><code>Ok</code></a>, with a panic message including the
|
||
passed message, and the content of the <a href="enum.Result.html#variant.Ok"><code>Ok</code></a>.</p>
|
||
<h1 id="examples-26" class="section-header"><a href="#examples-26">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">10</span>);
|
||
<span class="ident">x</span>.<span class="ident">expect_err</span>(<span class="string">"Testing expect_err"</span>); <span class="comment">// panics with `Testing expect_err: 10`</span></pre></div>
|
||
</div><h4 id='method.unwrap_err' class="method"><code id='unwrap_err.v'>pub fn <a href='#method.unwrap_err' class='fnname'>unwrap_err</a>(self) -> E</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1062-1067' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns the contained <a href="enum.Result.html#variant.Err"><code>Err</code></a> value, consuming the <code>self</code> value.</p>
|
||
<h1 id="panics-3" class="section-header"><a href="#panics-3">Panics</a></h1>
|
||
<p>Panics if the value is an <a href="enum.Result.html#variant.Ok"><code>Ok</code></a>, with a custom panic message provided
|
||
by the <a href="enum.Result.html#variant.Ok"><code>Ok</code></a>'s value.</p>
|
||
<h1 id="examples-27" class="section-header"><a href="#examples-27">Examples</a></h1>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">2</span>);
|
||
<span class="ident">x</span>.<span class="ident">unwrap_err</span>(); <span class="comment">// panics with `2`</span></pre></div>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"emergency failure"</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">unwrap_err</span>(), <span class="string">"emergency failure"</span>);</pre></div>
|
||
</div></div><h3 id='impl-7' class='impl'><code class='in-band'>impl<T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Default.html" title="trait nom::lib::std::prelude::v1::v1::Default">Default</a>, </span></code><a href='#impl-7' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1070-1106' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.unwrap_or_default' class="method"><code id='unwrap_or_default.v'>pub fn <a href='#method.unwrap_or_default' class='fnname'>unwrap_or_default</a>(self) -> T</code><span class='since' title='Stable since Rust version 1.16.0'>1.16.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1100-1105' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns the contained <a href="enum.Result.html#variant.Ok"><code>Ok</code></a> value or a default</p>
|
||
<p>Consumes the <code>self</code> argument then, if <a href="enum.Result.html#variant.Ok"><code>Ok</code></a>, returns the contained
|
||
value, otherwise if <a href="enum.Result.html#variant.Err"><code>Err</code></a>, returns the default value for that
|
||
type.</p>
|
||
<h1 id="examples-28" class="section-header"><a href="#examples-28">Examples</a></h1>
|
||
<p>Converts a string to an integer, turning poorly-formed strings
|
||
into 0 (the default value for integers). <a href="../../std/primitive.str.html#method.parse"><code>parse</code></a> converts
|
||
a string to any other type that implements <a href="../../std/str/trait.FromStr.html"><code>FromStr</code></a>, returning an
|
||
<a href="enum.Result.html#variant.Err"><code>Err</code></a> on error.</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">good_year_from_input</span> <span class="op">=</span> <span class="string">"1909"</span>;
|
||
<span class="kw">let</span> <span class="ident">bad_year_from_input</span> <span class="op">=</span> <span class="string">"190blarg"</span>;
|
||
<span class="kw">let</span> <span class="ident">good_year</span> <span class="op">=</span> <span class="ident">good_year_from_input</span>.<span class="ident">parse</span>().<span class="ident">unwrap_or_default</span>();
|
||
<span class="kw">let</span> <span class="ident">bad_year</span> <span class="op">=</span> <span class="ident">bad_year_from_input</span>.<span class="ident">parse</span>().<span class="ident">unwrap_or_default</span>();
|
||
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">1909</span>, <span class="ident">good_year</span>);
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="number">0</span>, <span class="ident">bad_year</span>);</pre></div>
|
||
</div></div><h3 id='impl-8' class='impl'><code class='in-band'>impl<T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Into.html" title="trait nom::lib::std::prelude::v1::v1::Into">Into</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.never.html">!</a>>, </span></code><a href='#impl-8' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1109-1144' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.into_ok' class="method"><code id='into_ok.v'>pub fn <a href='#method.into_ok' class='fnname'>into_ok</a>(self) -> T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1138-1143' title='goto source code'>[src]</a></h4><div class='stability'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>unwrap_infallible</code>)</summary><p>newly added</p>
|
||
</details></div></div><div class='docblock'><p>Returns the contained <a href="enum.Result.html#variant.Ok"><code>Ok</code></a> value, but never panics.</p>
|
||
<p>Unlike <a href="enum.Result.html#method.unwrap"><code>unwrap</code></a>, this method is known to never panic on the
|
||
result types it is implemented for. Therefore, it can be used
|
||
instead of <code>unwrap</code> as a maintainability safeguard that will fail
|
||
to compile if the error type of the <code>Result</code> is later changed
|
||
to an error that can actually occur.</p>
|
||
<h1 id="examples-29" class="section-header"><a href="#examples-29">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
|
||
<span class="kw">fn</span> <span class="ident">only_good_news</span>() <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">String</span>, <span class="op">!</span><span class="op">></span> {
|
||
<span class="prelude-val">Ok</span>(<span class="string">"this is fine"</span>.<span class="ident">into</span>())
|
||
}
|
||
|
||
<span class="kw">let</span> <span class="ident">s</span>: <span class="ident">String</span> <span class="op">=</span> <span class="ident">only_good_news</span>().<span class="ident">into_ok</span>();
|
||
<span class="macro">println</span><span class="macro">!</span>(<span class="string">"{}"</span>, <span class="ident">s</span>);</pre></div>
|
||
</div></div><h3 id='impl-9' class='impl'><code class='in-band'>impl<T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../../../nom/lib/std/ops/trait.Deref.html" title="trait nom::lib::std::ops::Deref">Deref</a>, </span></code><a href='#impl-9' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1147-1155' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.as_deref' class="method"><code id='as_deref.v'>pub fn <a href='#method.as_deref' class='fnname'>as_deref</a>(&self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><&<T as <a class="trait" href="../../../../nom/lib/std/ops/trait.Deref.html" title="trait nom::lib::std::ops::Deref">Deref</a>>::<a class="type" href="../../../../nom/lib/std/ops/trait.Deref.html#associatedtype.Target" title="type nom::lib::std::ops::Deref::Target">Target</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1152-1154' title='goto source code'>[src]</a></h4><div class='stability'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>inner_deref</code>)</summary><p>newly added</p>
|
||
</details></div></div><div class='docblock'><p>Converts from <code>Result<T, E></code> (or <code>&Result<T, E></code>) to <code>Result<&T::Target, &E></code>.</p>
|
||
<p>Leaves the original <code>Result</code> in-place, creating a new one containing a reference to the
|
||
<code>Ok</code> type's <code>Deref::Target</code> type.</p>
|
||
</div></div><h3 id='impl-10' class='impl'><code class='in-band'>impl<T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/ops/trait.Deref.html" title="trait nom::lib::std::ops::Deref">Deref</a>, </span></code><a href='#impl-10' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1158-1166' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.as_deref_err' class="method"><code id='as_deref_err.v'>pub fn <a href='#method.as_deref_err' class='fnname'>as_deref_err</a>(&self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T, &<E as <a class="trait" href="../../../../nom/lib/std/ops/trait.Deref.html" title="trait nom::lib::std::ops::Deref">Deref</a>>::<a class="type" href="../../../../nom/lib/std/ops/trait.Deref.html#associatedtype.Target" title="type nom::lib::std::ops::Deref::Target">Target</a>></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1163-1165' title='goto source code'>[src]</a></h4><div class='stability'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>inner_deref</code>)</summary><p>newly added</p>
|
||
</details></div></div><div class='docblock'><p>Converts from <code>Result<T, E></code> (or <code>&Result<T, E></code>) to <code>Result<&T, &E::Target></code>.</p>
|
||
<p>Leaves the original <code>Result</code> in-place, creating a new one containing a reference to the
|
||
<code>Err</code> type's <code>Deref::Target</code> type.</p>
|
||
</div></div><h3 id='impl-11' class='impl'><code class='in-band'>impl<T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../../../nom/lib/std/ops/trait.DerefMut.html" title="trait nom::lib::std::ops::DerefMut">DerefMut</a>, </span></code><a href='#impl-11' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1169-1177' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.as_deref_mut' class="method"><code id='as_deref_mut.v'>pub fn <a href='#method.as_deref_mut' class='fnname'>as_deref_mut</a>(&mut self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><&mut <T as <a class="trait" href="../../../../nom/lib/std/ops/trait.Deref.html" title="trait nom::lib::std::ops::Deref">Deref</a>>::<a class="type" href="../../../../nom/lib/std/ops/trait.Deref.html#associatedtype.Target" title="type nom::lib::std::ops::Deref::Target">Target</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1174-1176' title='goto source code'>[src]</a></h4><div class='stability'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>inner_deref</code>)</summary><p>newly added</p>
|
||
</details></div></div><div class='docblock'><p>Converts from <code>Result<T, E></code> (or <code>&mut Result<T, E></code>) to <code>Result<&mut T::Target, &mut E></code>.</p>
|
||
<p>Leaves the original <code>Result</code> in-place, creating a new one containing a mutable reference to
|
||
the <code>Ok</code> type's <code>Deref::Target</code> type.</p>
|
||
</div></div><h3 id='impl-12' class='impl'><code class='in-band'>impl<T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/ops/trait.DerefMut.html" title="trait nom::lib::std::ops::DerefMut">DerefMut</a>, </span></code><a href='#impl-12' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1180-1188' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.as_deref_mut_err' class="method"><code id='as_deref_mut_err.v'>pub fn <a href='#method.as_deref_mut_err' class='fnname'>as_deref_mut_err</a>(&mut self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T, &mut <E as <a class="trait" href="../../../../nom/lib/std/ops/trait.Deref.html" title="trait nom::lib::std::ops::Deref">Deref</a>>::<a class="type" href="../../../../nom/lib/std/ops/trait.Deref.html#associatedtype.Target" title="type nom::lib::std::ops::Deref::Target">Target</a>></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1185-1187' title='goto source code'>[src]</a></h4><div class='stability'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>inner_deref</code>)</summary><p>newly added</p>
|
||
</details></div></div><div class='docblock'><p>Converts from <code>Result<T, E></code> (or <code>&mut Result<T, E></code>) to <code>Result<&mut T, &mut E::Target></code>.</p>
|
||
<p>Leaves the original <code>Result</code> in-place, creating a new one containing a mutable reference to
|
||
the <code>Err</code> type's <code>Deref::Target</code> type.</p>
|
||
</div></div><h3 id='impl-13' class='impl'><code class='in-band'>impl<T, E> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Option.html" title="enum nom::lib::std::prelude::v1::v1::Option">Option</a><T>, E></code><a href='#impl-13' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1190-1215' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.transpose' class="method"><code id='transpose.v'>pub fn <a href='#method.transpose' class='fnname'>transpose</a>(self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Option.html" title="enum nom::lib::std::prelude::v1::v1::Option">Option</a><<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E>></code><span class='since' title='Stable since Rust version 1.33.0'>1.33.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1208-1214' title='goto source code'>[src]</a></h4><div class='docblock'><p>Transposes a <code>Result</code> of an <code>Option</code> into an <code>Option</code> of a <code>Result</code>.</p>
|
||
<p><code>Ok(None)</code> will be mapped to <code>None</code>.
|
||
<code>Ok(Some(_))</code> and <code>Err(_)</code> will be mapped to <code>Some(Ok(_))</code> and <code>Some(Err(_))</code>.</p>
|
||
<h1 id="examples-30" class="section-header"><a href="#examples-30">Examples</a></h1>
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">PartialEq</span>)]</span>
|
||
<span class="kw">struct</span> <span class="ident">SomeErr</span>;
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">i32</span><span class="op">></span>, <span class="ident">SomeErr</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(<span class="number">5</span>));
|
||
<span class="kw">let</span> <span class="ident">y</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">i32</span>, <span class="ident">SomeErr</span><span class="op">></span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(<span class="number">5</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">x</span>.<span class="ident">transpose</span>(), <span class="ident">y</span>);</pre></div>
|
||
</div></div><h2 id='implementations' class='small-section-header'>Trait Implementations<a href='#implementations' class='anchor'></a></h2><div id='implementations-list'><h3 id='impl-Clone' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Clone.html" title="trait nom::lib::std::prelude::v1::v1::Clone">Clone</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Clone.html" title="trait nom::lib::std::prelude::v1::v1::Clone">Clone</a>,<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Clone.html" title="trait nom::lib::std::prelude::v1::v1::Clone">Clone</a>, </span></code><a href='#impl-Clone' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1230-1247' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.clone' class="method hidden"><code id='clone.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1232-1237' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Returns a copy of the value. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.Clone.html#tymethod.clone">Read more</a></p>
|
||
</div><h4 id='method.clone_from' class="method hidden"><code id='clone_from.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&mut self, source: &<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E>)</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1240-1246' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs copy-assignment from <code>source</code>. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.Clone.html#method.clone_from">Read more</a></p>
|
||
</div></div><h3 id='impl-Copy' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Copy.html" title="trait nom::lib::std::prelude::v1::v1::Copy">Copy</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Copy.html" title="trait nom::lib::std::prelude::v1::v1::Copy">Copy</a>,<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Copy.html" title="trait nom::lib::std::prelude::v1::v1::Copy">Copy</a>, </span></code><a href='#impl-Copy' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h3><div class='impl-items'></div><h3 id='impl-Debug' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/fmt/trait.Debug.html" title="trait nom::lib::std::fmt::Debug">Debug</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/fmt/trait.Debug.html" title="trait nom::lib::std::fmt::Debug">Debug</a>,<br> T: <a class="trait" href="../../../../nom/lib/std/fmt/trait.Debug.html" title="trait nom::lib::std::fmt::Debug">Debug</a>, </span></code><a href='#impl-Debug' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.fmt' class="method hidden"><code id='fmt.v'>fn <a href='../../../../nom/lib/std/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&self, f: &mut <a class="struct" href="../../../../nom/lib/std/fmt/struct.Formatter.html" title="struct nom::lib::std::fmt::Formatter">Formatter</a>) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <a class="struct" href="../../../../nom/lib/std/fmt/struct.Error.html" title="struct nom::lib::std::fmt::Error">Error</a>></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Formats the value using the given formatter. <a href="../../../../nom/lib/std/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
|
||
</div></div><h3 id='impl-Eq' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Eq.html" title="trait nom::lib::std::prelude::v1::v1::Eq">Eq</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Eq.html" title="trait nom::lib::std::prelude::v1::v1::Eq">Eq</a>,<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Eq.html" title="trait nom::lib::std::prelude::v1::v1::Eq">Eq</a>, </span></code><a href='#impl-Eq' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h3><div class='impl-items'></div><h3 id='impl-FromIterator%3CResult%3CA%2C%20E%3E%3E' class='impl'><code class='in-band'>impl<A, E, V> <a class="trait" href="../../../../nom/lib/std/iter/trait.FromIterator.html" title="trait nom::lib::std::iter::FromIterator">FromIterator</a><<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><A, E>> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><V, E> <span class="where fmt-newline">where<br> V: <a class="trait" href="../../../../nom/lib/std/iter/trait.FromIterator.html" title="trait nom::lib::std::iter::FromIterator">FromIterator</a><A>, </span></code><a href='#impl-FromIterator%3CResult%3CA%2C%20E%3E%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1455-1505' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter' class="method"><code id='from_iter.v'>fn <a href='../../../../nom/lib/std/iter/trait.FromIterator.html#tymethod.from_iter' class='fnname'>from_iter</a><I>(iter: I) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><V, E> <span class="where fmt-newline">where<br> I: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html" title="trait nom::lib::std::prelude::v1::v1::IntoIterator">IntoIterator</a><Item = <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><A, E>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1499-1504' title='goto source code'>[src]</a></h4><div class='docblock'><p>Takes each element in the <code>Iterator</code>: if it is an <code>Err</code>, no further
|
||
elements are taken, and the <code>Err</code> is returned. Should no <code>Err</code> occur, a
|
||
container with the values of each <code>Result</code> is returned.</p>
|
||
<p>Here is an example which increments every integer in a vector,
|
||
checking for overflow:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>];
|
||
<span class="kw">let</span> <span class="ident">res</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span>, <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">x</span>: <span class="kw-2">&</span><span class="ident">u32</span><span class="op">|</span>
|
||
<span class="ident">x</span>.<span class="ident">checked_add</span>(<span class="number">1</span>).<span class="ident">ok_or</span>(<span class="string">"Overflow!"</span>)
|
||
).<span class="ident">collect</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">res</span>, <span class="prelude-val">Ok</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="number">2</span>, <span class="number">3</span>]));</pre></div>
|
||
<p>Here is another example that tries to subtract one from another list
|
||
of integers, this time checking for underflow:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">0</span>];
|
||
<span class="kw">let</span> <span class="ident">res</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span>, <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">x</span>: <span class="kw-2">&</span><span class="ident">u32</span><span class="op">|</span>
|
||
<span class="ident">x</span>.<span class="ident">checked_sub</span>(<span class="number">1</span>).<span class="ident">ok_or</span>(<span class="string">"Underflow!"</span>)
|
||
).<span class="ident">collect</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">res</span>, <span class="prelude-val">Err</span>(<span class="string">"Underflow!"</span>));</pre></div>
|
||
<p>Here is a variation on the previous example, showing that no
|
||
further elements are taken from <code>iter</code> after the first <code>Err</code>.</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">3</span>, <span class="number">2</span>, <span class="number">1</span>, <span class="number">10</span>];
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">shared</span> <span class="op">=</span> <span class="number">0</span>;
|
||
<span class="kw">let</span> <span class="ident">res</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span>, <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">x</span>: <span class="kw-2">&</span><span class="ident">u32</span><span class="op">|</span> {
|
||
<span class="ident">shared</span> <span class="op">+</span><span class="op">=</span> <span class="ident">x</span>;
|
||
<span class="ident">x</span>.<span class="ident">checked_sub</span>(<span class="number">2</span>).<span class="ident">ok_or</span>(<span class="string">"Underflow!"</span>)
|
||
}).<span class="ident">collect</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">res</span>, <span class="prelude-val">Err</span>(<span class="string">"Underflow!"</span>));
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">shared</span>, <span class="number">6</span>);</pre></div>
|
||
<p>Since the third element caused an underflow, no further elements were taken,
|
||
so the final value of <code>shared</code> is 6 (= <code>3 + 2 + 1</code>), not 16.</p>
|
||
</div></div><h3 id='impl-Hash' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/hash/trait.Hash.html" title="trait nom::lib::std::hash::Hash">Hash</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/hash/trait.Hash.html" title="trait nom::lib::std::hash::Hash">Hash</a>,<br> T: <a class="trait" href="../../../../nom/lib/std/hash/trait.Hash.html" title="trait nom::lib::std::hash::Hash">Hash</a>, </span></code><a href='#impl-Hash' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.hash' class="method hidden"><code id='hash.v'>fn <a href='../../../../nom/lib/std/hash/trait.Hash.html#tymethod.hash' class='fnname'>hash</a><__H>(&self, state: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>__H) <span class="where fmt-newline">where<br> __H: <a class="trait" href="../../../../nom/lib/std/hash/trait.Hasher.html" title="trait nom::lib::std::hash::Hasher">Hasher</a>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Feeds this value into the given [<code>Hasher</code>]. <a href="../../../../nom/lib/std/hash/trait.Hash.html#tymethod.hash">Read more</a></p>
|
||
</div><h4 id='method.hash_slice' class="method hidden"><code id='hash_slice.v'>fn <a href='../../../../nom/lib/std/hash/trait.Hash.html#method.hash_slice' class='fnname'>hash_slice</a><H>(data: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">&[Self]</a>, state: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>H) <span class="where fmt-newline">where<br> H: <a class="trait" href="../../../../nom/lib/std/hash/trait.Hasher.html" title="trait nom::lib::std::hash::Hasher">Hasher</a>, </span></code><span class='since' title='Stable since Rust version 1.3.0'>1.3.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/hash/mod.rs.html#194-201' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Feeds a slice of this type into the given [<code>Hasher</code>]. <a href="../../../../nom/lib/std/hash/trait.Hash.html#method.hash_slice">Read more</a></p>
|
||
</div></div><h3 id='impl-IntoIterator' class='impl'><code class='in-band'>impl<'a, T, E> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html" title="trait nom::lib::std::prelude::v1::v1::IntoIterator">IntoIterator</a> for &'a <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a href='#impl-IntoIterator' class='anchor'></a><span class='since' title='Stable since Rust version 1.4.0'>1.4.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1278-1285' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Item' class="type"><code id='Item.t'>type <a href='../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#associatedtype.Item' class="type">Item</a> = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>T</code></h4><div class='docblock'><p>The type of the elements being iterated over.</p>
|
||
</div><h4 id='associatedtype.IntoIter' class="type"><code id='IntoIter.t'>type <a href='../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#associatedtype.IntoIter' class="type">IntoIter</a> = <a class="struct" href="../../../../nom/lib/std/result/struct.Iter.html" title="struct nom::lib::std::result::Iter">Iter</a><'a, T></code></h4><div class='docblock'><p>Which kind of iterator are we turning this into?</p>
|
||
</div><h4 id='method.into_iter' class="method hidden"><code id='into_iter.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#tymethod.into_iter' class='fnname'>into_iter</a>(self) -> <a class="struct" href="../../../../nom/lib/std/result/struct.Iter.html" title="struct nom::lib::std::result::Iter">Iter</a><'a, T></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1282-1284' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Creates an iterator from a value. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#tymethod.into_iter">Read more</a></p>
|
||
</div></div><h3 id='impl-IntoIterator-1' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html" title="trait nom::lib::std::prelude::v1::v1::IntoIterator">IntoIterator</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a href='#impl-IntoIterator-1' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1250-1275' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Item-1' class="type"><code id='Item.t-1'>type <a href='../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#associatedtype.Item' class="type">Item</a> = T</code></h4><div class='docblock'><p>The type of the elements being iterated over.</p>
|
||
</div><h4 id='associatedtype.IntoIter-1' class="type"><code id='IntoIter.t-1'>type <a href='../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#associatedtype.IntoIter' class="type">IntoIter</a> = <a class="struct" href="../../../../nom/lib/std/result/struct.IntoIter.html" title="struct nom::lib::std::result::IntoIter">IntoIter</a><T></code></h4><div class='docblock'><p>Which kind of iterator are we turning this into?</p>
|
||
</div><h4 id='method.into_iter-1' class="method"><code id='into_iter.v-1'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#tymethod.into_iter' class='fnname'>into_iter</a>(self) -> <a class="struct" href="../../../../nom/lib/std/result/struct.IntoIter.html" title="struct nom::lib::std::result::IntoIter">IntoIter</a><T></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1272-1274' title='goto source code'>[src]</a></h4><div class='docblock'><p>Returns a consuming iterator over the possibly contained value.</p>
|
||
<p>The iterator yields one value if the result is [<code>Result::Ok</code>], otherwise none.</p>
|
||
<h1 id="examples-31" class="section-header"><a href="#examples-31">Examples</a></h1>
|
||
<p>Basic usage:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Ok</span>(<span class="number">5</span>);
|
||
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">into_iter</span>().<span class="ident">collect</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, [<span class="number">5</span>]);
|
||
|
||
<span class="kw">let</span> <span class="ident">x</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u32</span>, <span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="prelude-val">Err</span>(<span class="string">"nothing!"</span>);
|
||
<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">into_iter</span>().<span class="ident">collect</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, []);</pre></div>
|
||
</div></div><h3 id='impl-IntoIterator-2' class='impl'><code class='in-band'>impl<'a, T, E> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html" title="trait nom::lib::std::prelude::v1::v1::IntoIterator">IntoIterator</a> for &'a mut <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a href='#impl-IntoIterator-2' class='anchor'></a><span class='since' title='Stable since Rust version 1.4.0'>1.4.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1288-1295' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Item-2' class="type"><code id='Item.t-2'>type <a href='../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#associatedtype.Item' class="type">Item</a> = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a mut </a>T</code></h4><div class='docblock'><p>The type of the elements being iterated over.</p>
|
||
</div><h4 id='associatedtype.IntoIter-2' class="type"><code id='IntoIter.t-2'>type <a href='../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#associatedtype.IntoIter' class="type">IntoIter</a> = <a class="struct" href="../../../../nom/lib/std/result/struct.IterMut.html" title="struct nom::lib::std::result::IterMut">IterMut</a><'a, T></code></h4><div class='docblock'><p>Which kind of iterator are we turning this into?</p>
|
||
</div><h4 id='method.into_iter-2' class="method hidden"><code id='into_iter.v-2'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#tymethod.into_iter' class='fnname'>into_iter</a>(self) -> <a class="struct" href="../../../../nom/lib/std/result/struct.IterMut.html" title="struct nom::lib::std::result::IterMut">IterMut</a><'a, T></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1292-1294' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Creates an iterator from a value. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#tymethod.into_iter">Read more</a></p>
|
||
</div></div><h3 id='impl-Ord' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Ord.html" title="trait nom::lib::std::prelude::v1::v1::Ord">Ord</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Ord.html" title="trait nom::lib::std::prelude::v1::v1::Ord">Ord</a>,<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Ord.html" title="trait nom::lib::std::prelude::v1::v1::Ord">Ord</a>, </span></code><a href='#impl-Ord' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.cmp' class="method hidden"><code id='cmp.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.Ord.html#tymethod.cmp' class='fnname'>cmp</a>(&self, other: &<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E>) -> <a class="enum" href="../../../../nom/lib/std/cmp/enum.Ordering.html" title="enum nom::lib::std::cmp::Ordering">Ordering</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>This method returns an [<code>Ordering</code>] between <code>self</code> and <code>other</code>. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.Ord.html#tymethod.cmp">Read more</a></p>
|
||
</div><h4 id='method.max' class="method hidden"><code id='max.v'><span class="docblock attributes">#[must_use]
|
||
</span>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.Ord.html#method.max' class='fnname'>max</a>(self, other: Self) -> Self</code><span class='since' title='Stable since Rust version 1.21.0'>1.21.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/cmp.rs.html#599-604' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Compares and returns the maximum of two values. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.Ord.html#method.max">Read more</a></p>
|
||
</div><h4 id='method.min' class="method hidden"><code id='min.v'><span class="docblock attributes">#[must_use]
|
||
</span>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.Ord.html#method.min' class='fnname'>min</a>(self, other: Self) -> Self</code><span class='since' title='Stable since Rust version 1.21.0'>1.21.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/cmp.rs.html#619-624' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Compares and returns the minimum of two values. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.Ord.html#method.min">Read more</a></p>
|
||
</div><h4 id='method.clamp' class="method hidden"><code id='clamp.v'><span class="docblock attributes">#[must_use]
|
||
</span>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.Ord.html#method.clamp' class='fnname'>clamp</a>(self, min: Self, max: Self) -> Self</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/cmp.rs.html#646-658' title='goto source code'>[src]</a></h4><div class='stability hidden'><div class='stab unstable'><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>clamp</code>)</div></div><div class='docblock hidden'><p>Restrict a value to a certain interval. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.Ord.html#method.clamp">Read more</a></p>
|
||
</div></div><h3 id='impl-PartialEq%3CResult%3CT%2C%20E%3E%3E' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialEq.html" title="trait nom::lib::std::prelude::v1::v1::PartialEq">PartialEq</a><<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E>> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialEq.html" title="trait nom::lib::std::prelude::v1::v1::PartialEq">PartialEq</a><E>,<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialEq.html" title="trait nom::lib::std::prelude::v1::v1::PartialEq">PartialEq</a><T>, </span></code><a href='#impl-PartialEq%3CResult%3CT%2C%20E%3E%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.eq' class="method hidden"><code id='eq.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.PartialEq.html#tymethod.eq' class='fnname'>eq</a>(&self, other: &<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>This method tests for <code>self</code> and <code>other</code> values to be equal, and is used by <code>==</code>. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialEq.html#tymethod.eq">Read more</a></p>
|
||
</div><h4 id='method.ne' class="method hidden"><code id='ne.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.PartialEq.html#method.ne' class='fnname'>ne</a>(&self, other: &<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>This method tests for <code>!=</code>.</p>
|
||
</div></div><h3 id='impl-PartialOrd%3CResult%3CT%2C%20E%3E%3E' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html" title="trait nom::lib::std::prelude::v1::v1::PartialOrd">PartialOrd</a><<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E>> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html" title="trait nom::lib::std::prelude::v1::v1::PartialOrd">PartialOrd</a><E>,<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html" title="trait nom::lib::std::prelude::v1::v1::PartialOrd">PartialOrd</a><T>, </span></code><a href='#impl-PartialOrd%3CResult%3CT%2C%20E%3E%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.partial_cmp' class="method hidden"><code id='partial_cmp.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html#tymethod.partial_cmp' class='fnname'>partial_cmp</a>(&self, other: &<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E>) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Option.html" title="enum nom::lib::std::prelude::v1::v1::Option">Option</a><<a class="enum" href="../../../../nom/lib/std/cmp/enum.Ordering.html" title="enum nom::lib::std::cmp::Ordering">Ordering</a>></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>This method returns an ordering between <code>self</code> and <code>other</code> values if one exists. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html#tymethod.partial_cmp">Read more</a></p>
|
||
</div><h4 id='method.lt' class="method hidden"><code id='lt.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html#method.lt' class='fnname'>lt</a>(&self, other: &<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>This method tests less than (for <code>self</code> and <code>other</code>) and is used by the <code><</code> operator. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html#method.lt">Read more</a></p>
|
||
</div><h4 id='method.le' class="method hidden"><code id='le.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html#method.le' class='fnname'>le</a>(&self, other: &<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>This method tests less than or equal to (for <code>self</code> and <code>other</code>) and is used by the <code><=</code> operator. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html#method.le">Read more</a></p>
|
||
</div><h4 id='method.gt' class="method hidden"><code id='gt.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html#method.gt' class='fnname'>gt</a>(&self, other: &<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>This method tests greater than (for <code>self</code> and <code>other</code>) and is used by the <code>></code> operator. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html#method.gt">Read more</a></p>
|
||
</div><h4 id='method.ge' class="method hidden"><code id='ge.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html#method.ge' class='fnname'>ge</a>(&self, other: &<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>This method tests greater than or equal to (for <code>self</code> and <code>other</code>) and is used by the <code>>=</code> operator. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.PartialOrd.html#method.ge">Read more</a></p>
|
||
</div></div><h3 id='impl-Product%3CResult%3CU%2C%20E%3E%3E' class='impl'><code class='in-band'>impl<T, U, E> <a class="trait" href="../../../../nom/lib/std/iter/trait.Product.html" title="trait nom::lib::std::iter::Product">Product</a><<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><U, E>> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../../../nom/lib/std/iter/trait.Product.html" title="trait nom::lib::std::iter::Product">Product</a><U>, </span></code><a href='#impl-Product%3CResult%3CU%2C%20E%3E%3E' class='anchor'></a><span class='since' title='Stable since Rust version 1.16.0'>1.16.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/iter/traits/accum.rs.html#149-162' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.product' class="method"><code id='product.v'>fn <a href='../../../../nom/lib/std/iter/trait.Product.html#tymethod.product' class='fnname'>product</a><I>(iter: I) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> I: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Iterator.html" title="trait nom::lib::std::prelude::v1::v1::Iterator">Iterator</a><Item = <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><U, E>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/iter/traits/accum.rs.html#156-161' title='goto source code'>[src]</a></h4><div class='docblock'><p>Takes each element in the <code>Iterator</code>: if it is an <code>Err</code>, no further
|
||
elements are taken, and the <code>Err</code> is returned. Should no <code>Err</code> occur,
|
||
the product of all elements is returned.</p>
|
||
</div></div><h3 id='impl-StructuralEq' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.StructuralEq.html" title="trait core::marker::StructuralEq">StructuralEq</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a href='#impl-StructuralEq' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h3><div class='impl-items'></div><h3 id='impl-StructuralPartialEq' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.StructuralPartialEq.html" title="trait core::marker::StructuralPartialEq">StructuralPartialEq</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a href='#impl-StructuralPartialEq' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#243' title='goto source code'>[src]</a></h3><div class='impl-items'></div><h3 id='impl-Sum%3CResult%3CU%2C%20E%3E%3E' class='impl'><code class='in-band'>impl<T, U, E> <a class="trait" href="../../../../nom/lib/std/iter/trait.Sum.html" title="trait nom::lib::std::iter::Sum">Sum</a><<a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><U, E>> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> T: <a class="trait" href="../../../../nom/lib/std/iter/trait.Sum.html" title="trait nom::lib::std::iter::Sum">Sum</a><U>, </span></code><a href='#impl-Sum%3CResult%3CU%2C%20E%3E%3E' class='anchor'></a><span class='since' title='Stable since Rust version 1.16.0'>1.16.0</span><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/iter/traits/accum.rs.html#119-146' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.sum' class="method"><code id='sum.v'>fn <a href='../../../../nom/lib/std/iter/trait.Sum.html#tymethod.sum' class='fnname'>sum</a><I>(iter: I) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> I: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Iterator.html" title="trait nom::lib::std::prelude::v1::v1::Iterator">Iterator</a><Item = <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><U, E>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/iter/traits/accum.rs.html#140-145' title='goto source code'>[src]</a></h4><div class='docblock'><p>Takes each element in the <code>Iterator</code>: if it is an <code>Err</code>, no further
|
||
elements are taken, and the <code>Err</code> is returned. Should no <code>Err</code> occur,
|
||
the sum of all elements is returned.</p>
|
||
<h1 id="examples-32" class="section-header"><a href="#examples-32">Examples</a></h1>
|
||
<p>This sums up every integer in a vector, rejecting the sum if a negative
|
||
element is encountered:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>];
|
||
<span class="kw">let</span> <span class="ident">res</span>: <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">i32</span>, <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="kw-2">&</span><span class="ident">x</span>: <span class="kw-2">&</span><span class="ident">i32</span><span class="op">|</span>
|
||
<span class="kw">if</span> <span class="ident">x</span> <span class="op"><</span> <span class="number">0</span> { <span class="prelude-val">Err</span>(<span class="string">"Negative element found"</span>) }
|
||
<span class="kw">else</span> { <span class="prelude-val">Ok</span>(<span class="ident">x</span>) }
|
||
).<span class="ident">sum</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">res</span>, <span class="prelude-val">Ok</span>(<span class="number">3</span>));</pre></div>
|
||
</div></div><h3 id='impl-Termination' class='impl'><code class='in-band'>impl<E> <a class="trait" href="https://doc.rust-lang.org/nightly/std/process/trait.Termination.html" title="trait std::process::Termination">Termination</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.never.html">!</a>, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/fmt/trait.Debug.html" title="trait nom::lib::std::fmt::Debug">Debug</a>, </span></code><a href='#impl-Termination' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/process.rs.html#1676-1682' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.report' class="method hidden"><code id='report.v'>fn <a href='https://doc.rust-lang.org/nightly/std/process/trait.Termination.html#tymethod.report' class='fnname'>report</a>(self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/process.rs.html#1677-1681' title='goto source code'>[src]</a></h4><div class='stability hidden'><div class='stab unstable'><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>termination_trait_lib</code>)</div></div><div class='docblock hidden'><p>Is called to get the representation of the value as status code. This status code is returned to the operating system. <a href="https://doc.rust-lang.org/nightly/std/process/trait.Termination.html#tymethod.report">Read more</a></p>
|
||
</div></div><h3 id='impl-Termination-1' class='impl'><code class='in-band'>impl<E> <a class="trait" href="https://doc.rust-lang.org/nightly/std/process/trait.Termination.html" title="trait std::process::Termination">Termination</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/fmt/trait.Debug.html" title="trait nom::lib::std::fmt::Debug">Debug</a>, </span></code><a href='#impl-Termination-1' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/process.rs.html#1659-1666' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.report-1' class="method hidden"><code id='report.v-1'>fn <a href='https://doc.rust-lang.org/nightly/std/process/trait.Termination.html#tymethod.report' class='fnname'>report</a>(self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/process.rs.html#1660-1665' title='goto source code'>[src]</a></h4><div class='stability hidden'><div class='stab unstable'><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>termination_trait_lib</code>)</div></div><div class='docblock hidden'><p>Is called to get the representation of the value as status code. This status code is returned to the operating system. <a href="https://doc.rust-lang.org/nightly/std/process/trait.Termination.html#tymethod.report">Read more</a></p>
|
||
</div></div><h3 id='impl-Try' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/ops/trait.Try.html" title="trait nom::lib::std::ops::Try">Try</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a href='#impl-Try' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1508-1526' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Ok' class="type"><code id='Ok.t'>type <a href='../../../../nom/lib/std/ops/trait.Try.html#associatedtype.Ok' class="type">Ok</a> = T</code></h4><div class='stability'><div class='stab unstable'><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>try_trait</code>)</div></div><div class='docblock'><p>The type of this value when viewed as successful.</p>
|
||
</div><h4 id='associatedtype.Error' class="type"><code id='Error.t'>type <a href='../../../../nom/lib/std/ops/trait.Try.html#associatedtype.Error' class="type">Error</a> = E</code></h4><div class='stability'><div class='stab unstable'><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>try_trait</code>)</div></div><div class='docblock'><p>The type of this value when viewed as failed.</p>
|
||
</div><h4 id='method.into_result' class="method hidden"><code id='into_result.v'>fn <a href='../../../../nom/lib/std/ops/trait.Try.html#tymethod.into_result' class='fnname'>into_result</a>(self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1513-1515' title='goto source code'>[src]</a></h4><div class='stability hidden'><div class='stab unstable'><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>try_trait</code>)</div></div><div class='docblock hidden'><p>Applies the "?" operator. A return of <code>Ok(t)</code> means that the execution should continue normally, and the result of <code>?</code> is the value <code>t</code>. A return of <code>Err(e)</code> means that execution should branch to the innermost enclosing <code>catch</code>, or return from the function. <a href="../../../../nom/lib/std/ops/trait.Try.html#tymethod.into_result">Read more</a></p>
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||
</div><h4 id='method.from_ok' class="method hidden"><code id='from_ok.v'>fn <a href='../../../../nom/lib/std/ops/trait.Try.html#tymethod.from_ok' class='fnname'>from_ok</a>(v: T) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1518-1520' title='goto source code'>[src]</a></h4><div class='stability hidden'><div class='stab unstable'><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>try_trait</code>)</div></div><div class='docblock hidden'><p>Wrap an OK value to construct the composite result. For example, <code>Result::Ok(x)</code> and <code>Result::from_ok(x)</code> are equivalent. <a href="../../../../nom/lib/std/ops/trait.Try.html#tymethod.from_ok">Read more</a></p>
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</div><h4 id='method.from_error' class="method hidden"><code id='from_error.v'>fn <a href='../../../../nom/lib/std/ops/trait.Try.html#tymethod.from_error' class='fnname'>from_error</a>(v: E) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/result.rs.html#1523-1525' title='goto source code'>[src]</a></h4><div class='stability hidden'><div class='stab unstable'><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>try_trait</code>)</div></div><div class='docblock hidden'><p>Wrap an error value to construct the composite result. For example, <code>Result::Err(x)</code> and <code>Result::from_error(x)</code> are equivalent. <a href="../../../../nom/lib/std/ops/trait.Try.html#tymethod.from_error">Read more</a></p>
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||
</div></div></div><h2 id='synthetic-implementations' class='small-section-header'>Auto Trait Implementations<a href='#synthetic-implementations' class='anchor'></a></h2><div id='synthetic-implementations-list'><h3 id='impl-RefUnwindSafe' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.RefUnwindSafe.html" title="trait std::panic::RefUnwindSafe">RefUnwindSafe</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.RefUnwindSafe.html" title="trait std::panic::RefUnwindSafe">RefUnwindSafe</a>,<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.RefUnwindSafe.html" title="trait std::panic::RefUnwindSafe">RefUnwindSafe</a>, </span></code><a href='#impl-RefUnwindSafe' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-Send' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Send.html" title="trait nom::lib::std::prelude::v1::v1::Send">Send</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Send.html" title="trait nom::lib::std::prelude::v1::v1::Send">Send</a>,<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Send.html" title="trait nom::lib::std::prelude::v1::v1::Send">Send</a>, </span></code><a href='#impl-Send' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Sync.html" title="trait nom::lib::std::prelude::v1::v1::Sync">Sync</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Sync.html" title="trait nom::lib::std::prelude::v1::v1::Sync">Sync</a>,<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Sync.html" title="trait nom::lib::std::prelude::v1::v1::Sync">Sync</a>, </span></code><a href='#impl-Sync' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-Unpin' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Unpin.html" title="trait nom::lib::std::prelude::v1::v1::Unpin">Unpin</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Unpin.html" title="trait nom::lib::std::prelude::v1::v1::Unpin">Unpin</a>,<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Unpin.html" title="trait nom::lib::std::prelude::v1::v1::Unpin">Unpin</a>, </span></code><a href='#impl-Unpin' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-UnwindSafe' class='impl'><code class='in-band'>impl<T, E> <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html" title="trait std::panic::UnwindSafe">UnwindSafe</a> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, E> <span class="where fmt-newline">where<br> E: <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html" title="trait std::panic::UnwindSafe">UnwindSafe</a>,<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html" title="trait std::panic::UnwindSafe">UnwindSafe</a>, </span></code><a href='#impl-UnwindSafe' class='anchor'></a></h3><div class='impl-items'></div></div><h2 id='blanket-implementations' class='small-section-header'>Blanket Implementations<a href='#blanket-implementations' class='anchor'></a></h2><div id='blanket-implementations-list'><h3 id='impl-Any' class='impl'><code class='in-band'>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br> T: 'static + ?<a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Sized.html" title="trait nom::lib::std::prelude::v1::v1::Sized">Sized</a>, </span></code><a href='#impl-Any' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/any.rs.html#108-112' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.type_id' class="method hidden"><code id='type_id.v'>fn <a href='https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id' class='fnname'>type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/any.rs.html#109-111' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
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</div></div><h3 id='impl-Borrow%3CT%3E' class='impl'><code class='in-band'>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Sized.html" title="trait nom::lib::std::prelude::v1::v1::Sized">Sized</a>, </span></code><a href='#impl-Borrow%3CT%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#213-217' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.borrow' class="method hidden"><code id='borrow.v'>fn <a href='https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow' class='fnname'>borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#214-216' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
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</div></div><h3 id='impl-BorrowMut%3CT%3E' class='impl'><code class='in-band'>impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Sized.html" title="trait nom::lib::std::prelude::v1::v1::Sized">Sized</a>, </span></code><a href='#impl-BorrowMut%3CT%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#220-224' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.borrow_mut' class="method hidden"><code id='borrow_mut.v'>fn <a href='https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut' class='fnname'>borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#221-223' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
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||
</div></div><h3 id='impl-From%3CT%3E' class='impl'><code class='in-band'>impl<T> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.From.html" title="trait nom::lib::std::prelude::v1::v1::From">From</a><T> for T</code><a href='#impl-From%3CT%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#564-568' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from' class="method hidden"><code id='from.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.From.html#tymethod.from' class='fnname'>from</a>(t: T) -> T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#565-567' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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</div></div><h3 id='impl-Into%3CU%3E' class='impl'><code class='in-band'>impl<T, U> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Into.html" title="trait nom::lib::std::prelude::v1::v1::Into">Into</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.From.html" title="trait nom::lib::std::prelude::v1::v1::From">From</a><T>, </span></code><a href='#impl-Into%3CU%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#553-560' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.into' class="method hidden"><code id='into.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.Into.html#tymethod.into' class='fnname'>into</a>(self) -> U</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#557-559' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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||
</div></div><h3 id='impl-IntoIterator-3' class='impl'><code class='in-band'>impl<I> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html" title="trait nom::lib::std::prelude::v1::v1::IntoIterator">IntoIterator</a> for I <span class="where fmt-newline">where<br> I: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Iterator.html" title="trait nom::lib::std::prelude::v1::v1::Iterator">Iterator</a>, </span></code><a href='#impl-IntoIterator-3' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/iter/traits/collect.rs.html#243-250' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Item-3' class="type"><code id='Item.t-3'>type <a href='../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#associatedtype.Item' class="type">Item</a> = <I as <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Iterator.html" title="trait nom::lib::std::prelude::v1::v1::Iterator">Iterator</a>>::<a class="type" href="../../../../nom/lib/std/prelude/v1/v1/trait.Iterator.html#associatedtype.Item" title="type nom::lib::std::prelude::v1::v1::Iterator::Item">Item</a></code></h4><div class='docblock'><p>The type of the elements being iterated over.</p>
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</div><h4 id='associatedtype.IntoIter-3' class="type"><code id='IntoIter.t-3'>type <a href='../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#associatedtype.IntoIter' class="type">IntoIter</a> = I</code></h4><div class='docblock'><p>Which kind of iterator are we turning this into?</p>
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</div><h4 id='method.into_iter-3' class="method hidden"><code id='into_iter.v-3'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#tymethod.into_iter' class='fnname'>into_iter</a>(self) -> I</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/iter/traits/collect.rs.html#247-249' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Creates an iterator from a value. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.IntoIterator.html#tymethod.into_iter">Read more</a></p>
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||
</div></div><h3 id='impl-ToOwned' class='impl'><code class='in-band'>impl<T> <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.ToOwned.html" title="trait nom::lib::std::prelude::v1::v1::ToOwned">ToOwned</a> for T <span class="where fmt-newline">where<br> T: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Clone.html" title="trait nom::lib::std::prelude::v1::v1::Clone">Clone</a>, </span></code><a href='#impl-ToOwned' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#80-92' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Owned' class="type"><code id='Owned.t'>type <a href='../../../../nom/lib/std/prelude/v1/v1/trait.ToOwned.html#associatedtype.Owned' class="type">Owned</a> = T</code></h4><div class='docblock'><p>The resulting type after obtaining ownership.</p>
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</div><h4 id='method.to_owned' class="method hidden"><code id='to_owned.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.ToOwned.html#tymethod.to_owned' class='fnname'>to_owned</a>(&self) -> T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#85-87' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Creates owned data from borrowed data, usually by cloning. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.ToOwned.html#tymethod.to_owned">Read more</a></p>
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</div><h4 id='method.clone_into' class="method hidden"><code id='clone_into.v'>fn <a href='../../../../nom/lib/std/prelude/v1/v1/trait.ToOwned.html#method.clone_into' class='fnname'>clone_into</a>(&self, target: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T)</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#89-91' title='goto source code'>[src]</a></h4><div class='stability hidden'><div class='stab unstable'><details><summary><span class='emoji'>🔬</span> This is a nightly-only experimental API. (<code>toowned_clone_into</code>)</summary><p>recently added</p>
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</details></div></div><div class='docblock hidden'><p>Uses borrowed data to replace owned data, usually by cloning. <a href="../../../../nom/lib/std/prelude/v1/v1/trait.ToOwned.html#method.clone_into">Read more</a></p>
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</div></div><h3 id='impl-TryFrom%3CU%3E' class='impl'><code class='in-band'>impl<T, U> <a class="trait" href="../../../../nom/lib/std/convert/trait.TryFrom.html" title="trait nom::lib::std::convert::TryFrom">TryFrom</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Into.html" title="trait nom::lib::std::prelude::v1::v1::Into">Into</a><T>, </span></code><a href='#impl-TryFrom%3CU%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#601-610' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Error-1' class="type"><code id='Error.t-1'>type <a href='../../../../nom/lib/std/convert/trait.TryFrom.html#associatedtype.Error' class="type">Error</a> = <a class="enum" href="../../../../nom/lib/std/convert/enum.Infallible.html" title="enum nom::lib::std::convert::Infallible">Infallible</a></code></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
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</div><h4 id='method.try_from' class="method hidden"><code id='try_from.v'>fn <a href='../../../../nom/lib/std/convert/trait.TryFrom.html#tymethod.try_from' class='fnname'>try_from</a>(value: U) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><T, <T as <a class="trait" href="../../../../nom/lib/std/convert/trait.TryFrom.html" title="trait nom::lib::std::convert::TryFrom">TryFrom</a><U>>::<a class="type" href="../../../../nom/lib/std/convert/trait.TryFrom.html#associatedtype.Error" title="type nom::lib::std::convert::TryFrom::Error">Error</a>></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#607-609' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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</div></div><h3 id='impl-TryInto%3CU%3E' class='impl'><code class='in-band'>impl<T, U> <a class="trait" href="../../../../nom/lib/std/convert/trait.TryInto.html" title="trait nom::lib::std::convert::TryInto">TryInto</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="../../../../nom/lib/std/convert/trait.TryFrom.html" title="trait nom::lib::std::convert::TryFrom">TryFrom</a><T>, </span></code><a href='#impl-TryInto%3CU%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#587-596' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Error-2' class="type"><code id='Error.t-2'>type <a href='../../../../nom/lib/std/convert/trait.TryInto.html#associatedtype.Error' class="type">Error</a> = <U as <a class="trait" href="../../../../nom/lib/std/convert/trait.TryFrom.html" title="trait nom::lib::std::convert::TryFrom">TryFrom</a><T>>::<a class="type" href="../../../../nom/lib/std/convert/trait.TryFrom.html#associatedtype.Error" title="type nom::lib::std::convert::TryFrom::Error">Error</a></code></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
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</div><h4 id='method.try_into' class="method hidden"><code id='try_into.v'>fn <a href='../../../../nom/lib/std/convert/trait.TryInto.html#tymethod.try_into' class='fnname'>try_into</a>(self) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Result.html" title="enum nom::lib::std::prelude::v1::v1::Result">Result</a><U, <U as <a class="trait" href="../../../../nom/lib/std/convert/trait.TryFrom.html" title="trait nom::lib::std::convert::TryFrom">TryFrom</a><T>>::<a class="type" href="../../../../nom/lib/std/convert/trait.TryFrom.html#associatedtype.Error" title="type nom::lib::std::convert::TryFrom::Error">Error</a>></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#593-595' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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||
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