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<!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 `FromIterator` trait in crate `nom`."><meta name="keywords" content="rust, rustlang, rust-lang, FromIterator"><title>nom::lib::std::iter::FromIterator - 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 trait"><!--[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'>Trait FromIterator</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.from_iter">from_iter</a></div><a class="sidebar-title" href="#foreign-impls">Implementations on Foreign Types</a><div class="sidebar-links"><a href="#impl-FromIterator%3C%26%27b%20str%3E-for-Cow%3C%27a%2C%20str%3E">Cow<'a, str></a><a href="#impl-FromIterator%3C()%3E-for-()">()</a><a href="#impl-FromIterator%3C(K%2C%20V)%3E-for-HashMap%3CK%2C%20V%2C%20S%3E">HashMap<K, V, S></a><a href="#impl-FromIterator%3CP%3E-for-PathBuf">PathBuf</a><a href="#impl-FromIterator%3CString%3E-for-Cow%3C%27a%2C%20str%3E">Cow<'a, str></a><a href="#impl-FromIterator%3CT%3E-for-Arc%3C%5BT%5D%3E">Arc<[T]></a><a href="#impl-FromIterator%3CT%3E-for-Cow%3C%27a%2C%20%5BT%5D%3E">Cow<'a, [T]></a><a href="#impl-FromIterator%3CT%3E-for-HashSet%3CT%2C%20S%3E">HashSet<T, S></a><a href="#impl-FromIterator%3CT%3E-for-Rc%3C%5BT%5D%3E">Rc<[T]></a><a href="#impl-FromIterator%3Cchar%3E-for-Cow%3C%27a%2C%20str%3E">Cow<'a, str></a></div><a class="sidebar-title" href="#implementors">Implementors</a></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'>iter</a></p><script>window.sidebarCurrent = {name: 'FromIterator', ty: 'trait', 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/iter/traits/collect.rs.html#98-120' title='goto source code'>[src]</a></span><span class='in-band'>Trait <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'>iter</a>::<wbr><a class="trait" href=''>FromIterator</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class='rust trait'>pub trait FromIterator<A> {
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fn <a href='#tymethod.from_iter' class='fnname'>from_iter</a><T>(iter: T) -> Self<br> <span class="where">where<br> T: <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></span>;
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}</pre></div><div class='docblock'><p>Conversion from an <code>Iterator</code>.</p>
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<p>By implementing <code>FromIterator</code> for a type, you define how it will be
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created from an iterator. This is common for types which describe a
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collection of some kind.</p>
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<p><code>FromIterator</code>'s <a href="#tymethod.from_iter"><code>from_iter</code></a> is rarely called explicitly, and is instead
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used through <a href="trait.Iterator.html"><code>Iterator</code></a>'s <a href="trait.Iterator.html#method.collect"><code>collect</code></a> method. See <a href="trait.Iterator.html#method.collect"><code>collect</code></a>'s
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documentation for more examples.</p>
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<p>See also: <a href="trait.IntoIterator.html"><code>IntoIterator</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">use</span> <span class="ident">std</span>::<span class="ident">iter</span>::<span class="ident">FromIterator</span>;
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<span class="kw">let</span> <span class="ident">five_fives</span> <span class="op">=</span> <span class="ident">std</span>::<span class="ident">iter</span>::<span class="ident">repeat</span>(<span class="number">5</span>).<span class="ident">take</span>(<span class="number">5</span>);
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<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">from_iter</span>(<span class="ident">five_fives</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">5</span>, <span class="number">5</span>, <span class="number">5</span>, <span class="number">5</span>, <span class="number">5</span>]);</pre></div>
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<p>Using <a href="trait.Iterator.html#method.collect"><code>collect</code></a> to implicitly use <code>FromIterator</code>:</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">five_fives</span> <span class="op">=</span> <span class="ident">std</span>::<span class="ident">iter</span>::<span class="ident">repeat</span>(<span class="number">5</span>).<span class="ident">take</span>(<span class="number">5</span>);
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<span class="kw">let</span> <span class="ident">v</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">i32</span><span class="op">></span> <span class="op">=</span> <span class="ident">five_fives</span>.<span class="ident">collect</span>();
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">5</span>, <span class="number">5</span>, <span class="number">5</span>, <span class="number">5</span>, <span class="number">5</span>]);</pre></div>
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<p>Implementing <code>FromIterator</code> for your type:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">iter</span>::<span class="ident">FromIterator</span>;
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<span class="comment">// A sample collection, that's just a wrapper over Vec<T></span>
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<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
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<span class="kw">struct</span> <span class="ident">MyCollection</span>(<span class="ident">Vec</span><span class="op"><</span><span class="ident">i32</span><span class="op">></span>);
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<span class="comment">// Let's give it some methods so we can create one and add things</span>
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<span class="comment">// to it.</span>
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<span class="kw">impl</span> <span class="ident">MyCollection</span> {
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<span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-</span><span class="op">></span> <span class="ident">MyCollection</span> {
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<span class="ident">MyCollection</span>(<span class="ident">Vec</span>::<span class="ident">new</span>())
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}
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<span class="kw">fn</span> <span class="ident">add</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">elem</span>: <span class="ident">i32</span>) {
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<span class="self">self</span>.<span class="number">0</span>.<span class="ident">push</span>(<span class="ident">elem</span>);
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}
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}
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<span class="comment">// and we'll implement FromIterator</span>
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<span class="kw">impl</span> <span class="ident">FromIterator</span><span class="op"><</span><span class="ident">i32</span><span class="op">></span> <span class="kw">for</span> <span class="ident">MyCollection</span> {
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<span class="kw">fn</span> <span class="ident">from_iter</span><span class="op"><</span><span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">i32</span><span class="op">></span><span class="op">></span>(<span class="ident">iter</span>: <span class="ident">I</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">c</span> <span class="op">=</span> <span class="ident">MyCollection</span>::<span class="ident">new</span>();
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<span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="ident">iter</span> {
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<span class="ident">c</span>.<span class="ident">add</span>(<span class="ident">i</span>);
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}
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<span class="ident">c</span>
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}
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}
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<span class="comment">// Now we can make a new iterator...</span>
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<span class="kw">let</span> <span class="ident">iter</span> <span class="op">=</span> (<span class="number">0</span>..<span class="number">5</span>).<span class="ident">into_iter</span>();
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<span class="comment">// ... and make a MyCollection out of it</span>
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<span class="kw">let</span> <span class="ident">c</span> <span class="op">=</span> <span class="ident">MyCollection</span>::<span class="ident">from_iter</span>(<span class="ident">iter</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">c</span>.<span class="number">0</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>]);
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<span class="comment">// collect works too!</span>
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<span class="kw">let</span> <span class="ident">iter</span> <span class="op">=</span> (<span class="number">0</span>..<span class="number">5</span>).<span class="ident">into_iter</span>();
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<span class="kw">let</span> <span class="ident">c</span>: <span class="ident">MyCollection</span> <span class="op">=</span> <span class="ident">iter</span>.<span class="ident">collect</span>();
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">c</span>.<span class="number">0</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>]);</pre></div>
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</div>
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<h2 id='required-methods' class='small-section-header'>Required methods<a href='#required-methods' class='anchor'></a></h2><div class='methods'><h3 id='tymethod.from_iter' class='method'><code id='from_iter.v'>fn <a href='#tymethod.from_iter' class='fnname'>from_iter</a><T>(iter: T) -> Self <span class="where fmt-newline">where<br> T: <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>, </span></code></h3><div class='docblock'><p>Creates a value from an iterator.</p>
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<p>See the <a href="index.html">module-level documentation</a> for more.</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">use</span> <span class="ident">std</span>::<span class="ident">iter</span>::<span class="ident">FromIterator</span>;
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<span class="kw">let</span> <span class="ident">five_fives</span> <span class="op">=</span> <span class="ident">std</span>::<span class="ident">iter</span>::<span class="ident">repeat</span>(<span class="number">5</span>).<span class="ident">take</span>(<span class="number">5</span>);
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<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">from_iter</span>(<span class="ident">five_fives</span>);
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<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">v</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="number">5</span>, <span class="number">5</span>, <span class="number">5</span>, <span class="number">5</span>, <span class="number">5</span>]);</pre></div>
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</div></div><span class='loading-content'>Loading content...</span>
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<h2 id='foreign-impls' class='small-section-header'>Implementations on Foreign Types<a href='#foreign-impls' class='anchor'></a></h2><h3 id='impl-FromIterator%3CP%3E-for-PathBuf' class='impl'><code class='in-band'>impl<P> <a class="trait" href="../../../../nom/lib/std/iter/trait.FromIterator.html" title="trait nom::lib::std::iter::FromIterator">FromIterator</a><P> for <a class="struct" href="https://doc.rust-lang.org/nightly/std/path/struct.PathBuf.html" title="struct std::path::PathBuf">PathBuf</a> <span class="where fmt-newline">where<br> P: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.AsRef.html" title="trait nom::lib::std::prelude::v1::v1::AsRef">AsRef</a><<a class="struct" href="https://doc.rust-lang.org/nightly/std/path/struct.Path.html" title="struct std::path::Path">Path</a>>, </span></code><a href='#impl-FromIterator%3CP%3E-for-PathBuf' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/path.rs.html#1514-1520' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter' class="method hidden"><code id='from_iter.v-1'>fn <a href='#method.from_iter' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="https://doc.rust-lang.org/nightly/std/path/struct.PathBuf.html" title="struct std::path::PathBuf">PathBuf</a> <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 = P>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/path.rs.html#1515-1519' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3C()%3E-for-()' class='impl'><code class='in-band'>impl <a class="trait" href="../../../../nom/lib/std/iter/trait.FromIterator.html" title="trait nom::lib::std::iter::FromIterator">FromIterator</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>> for <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a></code><a href='#impl-FromIterator%3C()%3E-for-()' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/unit.rs.html#17-21' title='goto source code'>[src]</a></h3><div class='docblock'><p>Collapses all unit items from an iterator into one.</p>
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<p>This is more useful when combined with higher-level abstractions, like
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collecting to a <code>Result<(), E></code> where you only care about errors:</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::<span class="kw-2">*</span>;
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<span class="kw">let</span> <span class="ident">data</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">3</span>, <span class="number">4</span>, <span class="number">5</span>];
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<span class="kw">let</span> <span class="ident">res</span>: <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> <span class="op">=</span> <span class="ident">data</span>.<span class="ident">iter</span>()
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.<span class="ident">map</span>(<span class="op">|</span><span class="ident">x</span><span class="op">|</span> <span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">stdout</span>(), <span class="string">"{}"</span>, <span class="ident">x</span>))
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.<span class="ident">collect</span>();
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<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">res</span>.<span class="ident">is_ok</span>());</pre></div>
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</div><div class='impl-items'><h4 id='method.from_iter-1' class="method hidden"><code id='from_iter.v-2'>fn <a href='#method.from_iter' class='fnname'>from_iter</a><I>(iter: I) <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="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/unit.rs.html#18-20' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CString%3E-for-Cow%3C%27a%2C%20str%3E' class='impl'><code class='in-band'>impl<'a> <a class="trait" href="../../../../nom/lib/std/iter/trait.FromIterator.html" title="trait nom::lib::std::iter::FromIterator">FromIterator</a><<a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a>> for <a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>></code><a href='#impl-FromIterator%3CString%3E-for-Cow%3C%27a%2C%20str%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#2325-2329' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-2' class="method hidden"><code id='from_iter.v-3'>fn <a href='#method.from_iter' class='fnname'>from_iter</a><I>(it: I) -> <a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>> <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="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#2326-2328' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3C%26%27b%20str%3E-for-Cow%3C%27a%2C%20str%3E' class='impl'><code class='in-band'>impl<'a, 'b> <a class="trait" href="../../../../nom/lib/std/iter/trait.FromIterator.html" title="trait nom::lib::std::iter::FromIterator">FromIterator</a><&'b <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>> for <a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>></code><a href='#impl-FromIterator%3C%26%27b%20str%3E-for-Cow%3C%27a%2C%20str%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#2318-2322' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-3' class="method hidden"><code id='from_iter.v-4'>fn <a href='#method.from_iter' class='fnname'>from_iter</a><I>(it: I) -> <a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>> <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 = &'b <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#2319-2321' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CT%3E-for-Rc%3C%5BT%5D%3E' class='impl'><code class='in-band'>impl<T> <a class="trait" href="../../../../nom/lib/std/iter/trait.FromIterator.html" title="trait nom::lib::std::iter::FromIterator">FromIterator</a><T> for <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html" title="struct alloc::rc::Rc">Rc</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>></code><a href='#impl-FromIterator%3CT%3E-for-Rc%3C%5BT%5D%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/rc.rs.html#1473-1515' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-4' class="method"><code id='from_iter.v-5'>fn <a href='#method.from_iter' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/rc/struct.Rc.html" title="struct alloc::rc::Rc">Rc</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>> <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 = T>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/rc.rs.html#1512-1514' title='goto source code'>[src]</a></h4><div class='docblock'><p>Takes each element in the <code>Iterator</code> and collects it into an <code>Rc<[T]></code>.</p>
|
||
<h1 id="performance-characteristics" class="section-header"><a href="#performance-characteristics">Performance characteristics</a></h1><h2 id="the-general-case" class="section-header"><a href="#the-general-case">The general case</a></h2>
|
||
<p>In the general case, collecting into <code>Rc<[T]></code> is done by first
|
||
collecting into a <code>Vec<T></code>. That is, when writing the following:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">evens</span>: <span class="ident">Rc</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> <span class="op">=</span> (<span class="number">0</span>..<span class="number">10</span>).<span class="ident">filter</span>(<span class="op">|</span><span class="kw-2">&</span><span class="ident">x</span><span class="op">|</span> <span class="ident">x</span> <span class="op">%</span> <span class="number">2</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span>).<span class="ident">collect</span>();</pre></div>
|
||
<p>this behaves as if we wrote:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">evens</span>: <span class="ident">Rc</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> <span class="op">=</span> (<span class="number">0</span>..<span class="number">10</span>).<span class="ident">filter</span>(<span class="op">|</span><span class="kw-2">&</span><span class="ident">x</span><span class="op">|</span> <span class="ident">x</span> <span class="op">%</span> <span class="number">2</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span>)
|
||
.<span class="ident">collect</span>::<span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="kw">_</span><span class="op">></span><span class="op">></span>() <span class="comment">// The first set of allocations happens here.</span>
|
||
.<span class="ident">into</span>(); <span class="comment">// A second allocation for `Rc<[T]>` happens here.</span></pre></div>
|
||
<p>This will allocate as many times as needed for constructing the <code>Vec<T></code>
|
||
and then it will allocate once for turning the <code>Vec<T></code> into the <code>Rc<[T]></code>.</p>
|
||
<h2 id="iterators-of-known-length" class="section-header"><a href="#iterators-of-known-length">Iterators of known length</a></h2>
|
||
<p>When your <code>Iterator</code> implements <code>TrustedLen</code> and is of an exact size,
|
||
a single allocation will be made for the <code>Rc<[T]></code>. For example:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">evens</span>: <span class="ident">Rc</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> <span class="op">=</span> (<span class="number">0</span>..<span class="number">10</span>).<span class="ident">collect</span>(); <span class="comment">// Just a single allocation happens here.</span></pre></div>
|
||
</div></div><h3 id='impl-FromIterator%3Cchar%3E-for-Cow%3C%27a%2C%20str%3E' class='impl'><code class='in-band'>impl<'a> <a class="trait" href="../../../../nom/lib/std/iter/trait.FromIterator.html" title="trait nom::lib::std::iter::FromIterator">FromIterator</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>> for <a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>></code><a href='#impl-FromIterator%3Cchar%3E-for-Cow%3C%27a%2C%20str%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#2311-2315' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-5' class="method hidden"><code id='from_iter.v-6'>fn <a href='#method.from_iter' class='fnname'>from_iter</a><I>(it: I) -> <a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>> <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="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#2312-2314' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CT%3E-for-Arc%3C%5BT%5D%3E' class='impl'><code class='in-band'>impl<T> <a class="trait" href="../../../../nom/lib/std/iter/trait.FromIterator.html" title="trait nom::lib::std::iter::FromIterator">FromIterator</a><T> for <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>></code><a href='#impl-FromIterator%3CT%3E-for-Arc%3C%5BT%5D%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/sync.rs.html#2022-2064' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-6' class="method"><code id='from_iter.v-7'>fn <a href='#method.from_iter' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/sync/struct.Arc.html" title="struct alloc::sync::Arc">Arc</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>> <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 = T>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/sync.rs.html#2061-2063' title='goto source code'>[src]</a></h4><div class='docblock'><p>Takes each element in the <code>Iterator</code> and collects it into an <code>Arc<[T]></code>.</p>
|
||
<h1 id="performance-characteristics-1" class="section-header"><a href="#performance-characteristics-1">Performance characteristics</a></h1><h2 id="the-general-case-1" class="section-header"><a href="#the-general-case-1">The general case</a></h2>
|
||
<p>In the general case, collecting into <code>Arc<[T]></code> is done by first
|
||
collecting into a <code>Vec<T></code>. That is, when writing the following:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">evens</span>: <span class="ident">Arc</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> <span class="op">=</span> (<span class="number">0</span>..<span class="number">10</span>).<span class="ident">filter</span>(<span class="op">|</span><span class="kw-2">&</span><span class="ident">x</span><span class="op">|</span> <span class="ident">x</span> <span class="op">%</span> <span class="number">2</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span>).<span class="ident">collect</span>();</pre></div>
|
||
<p>this behaves as if we wrote:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">evens</span>: <span class="ident">Arc</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> <span class="op">=</span> (<span class="number">0</span>..<span class="number">10</span>).<span class="ident">filter</span>(<span class="op">|</span><span class="kw-2">&</span><span class="ident">x</span><span class="op">|</span> <span class="ident">x</span> <span class="op">%</span> <span class="number">2</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span>)
|
||
.<span class="ident">collect</span>::<span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="kw">_</span><span class="op">></span><span class="op">></span>() <span class="comment">// The first set of allocations happens here.</span>
|
||
.<span class="ident">into</span>(); <span class="comment">// A second allocation for `Arc<[T]>` happens here.</span></pre></div>
|
||
<p>This will allocate as many times as needed for constructing the <code>Vec<T></code>
|
||
and then it will allocate once for turning the <code>Vec<T></code> into the <code>Arc<[T]></code>.</p>
|
||
<h2 id="iterators-of-known-length-1" class="section-header"><a href="#iterators-of-known-length-1">Iterators of known length</a></h2>
|
||
<p>When your <code>Iterator</code> implements <code>TrustedLen</code> and is of an exact size,
|
||
a single allocation will be made for the <code>Arc<[T]></code>. For example:</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">evens</span>: <span class="ident">Arc</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> <span class="op">=</span> (<span class="number">0</span>..<span class="number">10</span>).<span class="ident">collect</span>(); <span class="comment">// Just a single allocation happens here.</span></pre></div>
|
||
</div></div><h3 id='impl-FromIterator%3CT%3E-for-Cow%3C%27a%2C%20%5BT%5D%3E' class='impl'><code class='in-band'>impl<'a, T> <a class="trait" href="../../../../nom/lib/std/iter/trait.FromIterator.html" title="trait nom::lib::std::iter::FromIterator">FromIterator</a><T> for <a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>> <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-FromIterator%3CT%3E-for-Cow%3C%27a%2C%20%5BT%5D%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/vec.rs.html#2461-2468' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-7' class="method hidden"><code id='from_iter.v-8'>fn <a href='#method.from_iter' class='fnname'>from_iter</a><I>(it: I) -> <a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>T<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>> <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 = T>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/vec.rs.html#2465-2467' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3C(K%2C%20V)%3E-for-HashMap%3CK%2C%20V%2C%20S%3E' class='impl'><code class='in-band'>impl<K, V, S> <a class="trait" href="../../../../nom/lib/std/iter/trait.FromIterator.html" title="trait nom::lib::std::iter::FromIterator">FromIterator</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a>K, V<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>> for <a class="struct" href="../../../../hashbrown/map/struct.HashMap.html" title="struct hashbrown::map::HashMap">HashMap</a><K, V, S> <span class="where fmt-newline">where<br> K: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Eq.html" title="trait nom::lib::std::prelude::v1::v1::Eq">Eq</a> + <a class="trait" href="../../../../nom/lib/std/hash/trait.Hash.html" title="trait nom::lib::std::hash::Hash">Hash</a>,<br> S: <a class="trait" href="../../../../nom/lib/std/hash/trait.BuildHasher.html" title="trait nom::lib::std::hash::BuildHasher">BuildHasher</a> + <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-FromIterator%3C(K%2C%20V)%3E-for-HashMap%3CK%2C%20V%2C%20S%3E' class='anchor'></a><a class='srclink' href='../../../../src/hashbrown/map.rs.html#2544-2558' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-8' class="method hidden"><code id='from_iter.v-9'>fn <a href='#method.from_iter' class='fnname'>from_iter</a><T>(iter: T) -> <a class="struct" href="../../../../hashbrown/map/struct.HashMap.html" title="struct hashbrown::map::HashMap">HashMap</a><K, V, S> <span class="where fmt-newline">where<br> T: <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="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a>K, V<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>>, </span></code><a class='srclink' href='../../../../src/hashbrown/map.rs.html#2550-2557' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CT%3E-for-HashSet%3CT%2C%20S%3E' class='impl'><code class='in-band'>impl<T, S> <a class="trait" href="../../../../nom/lib/std/iter/trait.FromIterator.html" title="trait nom::lib::std::iter::FromIterator">FromIterator</a><T> for <a class="struct" href="../../../../hashbrown/set/struct.HashSet.html" title="struct hashbrown::set::HashSet">HashSet</a><T, S> <span class="where fmt-newline">where<br> S: <a class="trait" href="../../../../nom/lib/std/hash/trait.BuildHasher.html" title="trait nom::lib::std::hash::BuildHasher">BuildHasher</a> + <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Default.html" title="trait nom::lib::std::prelude::v1::v1::Default">Default</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> + <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-FromIterator%3CT%3E-for-HashSet%3CT%2C%20S%3E' class='anchor'></a><a class='srclink' href='../../../../src/hashbrown/set.rs.html#893-904' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-9' class="method hidden"><code id='from_iter.v-10'>fn <a href='#method.from_iter' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="../../../../hashbrown/set/struct.HashSet.html" title="struct hashbrown::set::HashSet">HashSet</a><T, S> <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 = T>, </span></code><a class='srclink' href='../../../../src/hashbrown/set.rs.html#899-903' title='goto source code'>[src]</a></h4></div><span class='loading-content'>Loading content...</span>
|
||
<h2 id='implementors' class='small-section-header'>Implementors<a href='#implementors' class='anchor'></a></h2><div class='item-list' id='implementors-list'><h3 id='impl-FromIterator%3Cchar%3E' class='impl'><code class='in-band'>impl FromIterator<<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>> for <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a></code><a href='#impl-FromIterator%3Cchar%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#1728-1734' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-10' class="method hidden"><code id='from_iter.v-11'>fn <a href='#method.from_iter-10' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a> <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="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#1729-1733' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CString%3E' class='impl'><code class='in-band'>impl FromIterator<<a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a>> for <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a></code><a href='#impl-FromIterator%3CString%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#1755-1770' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-11' class="method hidden"><code id='from_iter.v-12'>fn <a href='#method.from_iter-11' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a> <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="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#1756-1769' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3C%26%27a%20char%3E' class='impl'><code class='in-band'>impl<'a> FromIterator<&'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>> for <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a></code><a href='#impl-FromIterator%3C%26%27a%20char%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#1737-1743' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-12' class="method hidden"><code id='from_iter.v-13'>fn <a href='#method.from_iter-12' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a> <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 <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.char.html">char</a>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#1738-1742' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3C%26%27a%20str%3E' class='impl'><code class='in-band'>impl<'a> FromIterator<&'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>> for <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a></code><a href='#impl-FromIterator%3C%26%27a%20str%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#1746-1752' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-13' class="method hidden"><code id='from_iter.v-14'>fn <a href='#method.from_iter-13' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a> <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 <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#1747-1751' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CCow%3C%27a%2C%20str%3E%3E' class='impl'><code class='in-band'>impl<'a> FromIterator<<a class="enum" href="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>> for <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a></code><a href='#impl-FromIterator%3CCow%3C%27a%2C%20str%3E%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#1773-1789' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-14' class="method hidden"><code id='from_iter.v-15'>fn <a href='#method.from_iter-14' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.String.html" title="struct nom::lib::std::prelude::v1::v1::String">String</a> <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="https://doc.rust-lang.org/nightly/alloc/borrow/enum.Cow.html" title="enum alloc::borrow::Cow">Cow</a><'a, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#1774-1788' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CA%3E' class='impl'><code class='in-band'>impl<A> FromIterator<A> for <a class="struct" href="../../../../nom/lib/std/collections/struct.VecDeque.html" title="struct nom::lib::std::collections::VecDeque">VecDeque</a><A></code><a href='#impl-FromIterator%3CA%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/collections/vec_deque.rs.html#2662-2670' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-15' class="method hidden"><code id='from_iter.v-16'>fn <a href='#method.from_iter-15' class='fnname'>from_iter</a><T>(iter: T) -> <a class="struct" href="../../../../nom/lib/std/collections/struct.VecDeque.html" title="struct nom::lib::std::collections::VecDeque">VecDeque</a><A> <span class="where fmt-newline">where<br> T: <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>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/collections/vec_deque.rs.html#2663-2669' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CA%3E-1' class='impl'><code class='in-band'>impl<A> FromIterator<A> for <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.Box.html" title="struct nom::lib::std::prelude::v1::v1::Box">Box</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>A<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>></code><a href='#impl-FromIterator%3CA%3E-1' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/boxed.rs.html#1042-1046' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-16' class="method hidden"><code id='from_iter.v-17'>fn <a href='#method.from_iter-16' class='fnname'>from_iter</a><T>(iter: T) -> <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.Box.html" title="struct nom::lib::std::prelude::v1::v1::Box">Box</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">[</a>A<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.slice.html">]</a>> <span class="where fmt-newline">where<br> T: <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>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/boxed.rs.html#1043-1045' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CResult%3CA%2C%20E%3E%3E' class='impl'><code class='in-band'>impl<A, E, V> FromIterator<<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-17' class="method"><code id='from_iter.v-18'>fn <a href='#method.from_iter-17' 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-FromIterator%3COption%3CA%3E%3E' class='impl'><code class='in-band'>impl<A, V> FromIterator<<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>> for <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Option.html" title="enum nom::lib::std::prelude::v1::v1::Option">Option</a><V> <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%3COption%3CA%3E%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/option.rs.html#1505-1575' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-18' class="method"><code id='from_iter.v-19'>fn <a href='#method.from_iter-18' class='fnname'>from_iter</a><I>(iter: I) -> <a class="enum" href="../../../../nom/lib/std/prelude/v1/v1/enum.Option.html" title="enum nom::lib::std::prelude::v1::v1::Option">Option</a><V> <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.Option.html" title="enum nom::lib::std::prelude::v1::v1::Option">Option</a><A>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/option.rs.html#1569-1574' title='goto source code'>[src]</a></h4><div class='docblock'><p>Takes each element in the <a href="../iter/trait.Iterator.html"><code>Iterator</code></a>: if it is [<code>None</code>][Option::None],
|
||
no further elements are taken, and the [<code>None</code>][Option::None] is
|
||
returned. Should no [<code>None</code>][Option::None] occur, a container with the
|
||
values of each [<code>Option</code>] is returned.</p>
|
||
<h1 id="examples-2" class="section-header"><a href="#examples-2">Examples</a></h1>
|
||
<p>Here is an example which increments every integer in a vector.
|
||
We use the checked variant of <code>add</code> that returns <code>None</code> when the
|
||
calculation would result in an overflow.</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">items</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">0_u16</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">Option</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">u16</span><span class="op">></span><span class="op">></span> <span class="op">=</span> <span class="ident">items</span>
|
||
.<span class="ident">iter</span>()
|
||
.<span class="ident">map</span>(<span class="op">|</span><span class="ident">x</span><span class="op">|</span> <span class="ident">x</span>.<span class="ident">checked_add</span>(<span class="number">1</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">Some</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>]));</pre></div>
|
||
<p>As you can see, this will return the expected, valid items.</p>
|
||
<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">items</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">2_u16</span>, <span class="number">1</span>, <span class="number">0</span>];
|
||
|
||
<span class="kw">let</span> <span class="ident">res</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">u16</span><span class="op">></span><span class="op">></span> <span class="op">=</span> <span class="ident">items</span>
|
||
.<span class="ident">iter</span>()
|
||
.<span class="ident">map</span>(<span class="op">|</span><span class="ident">x</span><span class="op">|</span> <span class="ident">x</span>.<span class="ident">checked_sub</span>(<span class="number">1</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">None</span>);</pre></div>
|
||
<p>Since the last element is zero, it would underflow. Thus, the resulting
|
||
value is <code>None</code>.</p>
|
||
<p>Here is a variation on the previous example, showing that no
|
||
further elements are taken from <code>iter</code> after the first <code>None</code>.</p>
|
||
|
||
<div class="example-wrap"><pre class="rust rust-example-rendered">
|
||
<span class="kw">let</span> <span class="ident">items</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">3_u16</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">Option</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">u16</span><span class="op">></span><span class="op">></span> <span class="op">=</span> <span class="ident">items</span>
|
||
.<span class="ident">iter</span>()
|
||
.<span class="ident">map</span>(<span class="op">|</span><span class="ident">x</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">collect</span>();
|
||
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">res</span>, <span class="prelude-val">None</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-FromIterator%3C(K%2C%20V)%3E' class='impl'><code class='in-band'>impl<K, V> FromIterator<<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a>K, V<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>> for <a class="struct" href="../../../../nom/lib/std/collections/struct.BTreeMap.html" title="struct nom::lib::std::collections::BTreeMap">BTreeMap</a><K, V> <span class="where fmt-newline">where<br> K: <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-FromIterator%3C(K%2C%20V)%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/collections/btree/map.rs.html#1763-1769' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-19' class="method hidden"><code id='from_iter.v-20'>fn <a href='#method.from_iter-19' class='fnname'>from_iter</a><T>(iter: T) -> <a class="struct" href="../../../../nom/lib/std/collections/struct.BTreeMap.html" title="struct nom::lib::std::collections::BTreeMap">BTreeMap</a><K, V> <span class="where fmt-newline">where<br> T: <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="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a>K, V<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/collections/btree/map.rs.html#1764-1768' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3C(K%2C%20V)%3E-1' class='impl'><code class='in-band'>impl<K, V, S> FromIterator<<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a>K, V<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>> for nom::lib::std::collections::<a class="struct" href="../../../../nom/lib/std/collections/struct.HashMap.html" title="struct nom::lib::std::collections::HashMap">HashMap</a><K, V, S> <span class="where fmt-newline">where<br> K: <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Eq.html" title="trait nom::lib::std::prelude::v1::v1::Eq">Eq</a> + <a class="trait" href="../../../../nom/lib/std/hash/trait.Hash.html" title="trait nom::lib::std::hash::Hash">Hash</a>,<br> S: <a class="trait" href="../../../../nom/lib/std/hash/trait.BuildHasher.html" title="trait nom::lib::std::hash::BuildHasher">BuildHasher</a> + <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-FromIterator%3C(K%2C%20V)%3E-1' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/collections/hash/map.rs.html#2366-2376' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-20' class="method hidden"><code id='from_iter.v-21'>fn <a href='#method.from_iter-20' class='fnname'>from_iter</a><T>(iter: T) -> <a class="struct" href="../../../../nom/lib/std/collections/struct.HashMap.html" title="struct nom::lib::std::collections::HashMap">HashMap</a><K, V, S> <span class="where fmt-newline">where<br> T: <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="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a>K, V<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/collections/hash/map.rs.html#2371-2375' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CT%3E' class='impl'><code class='in-band'>impl<T> FromIterator<T> for <a class="struct" href="../../../../nom/lib/std/collections/struct.BTreeSet.html" title="struct nom::lib::std::collections::BTreeSet">BTreeSet</a><T> <span class="where fmt-newline">where<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-FromIterator%3CT%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/collections/btree/set.rs.html#1018-1024' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-21' class="method hidden"><code id='from_iter.v-22'>fn <a href='#method.from_iter-21' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="../../../../nom/lib/std/collections/struct.BTreeSet.html" title="struct nom::lib::std::collections::BTreeSet">BTreeSet</a><T> <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 = T>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/collections/btree/set.rs.html#1019-1023' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CT%3E-1' class='impl'><code class='in-band'>impl<T> FromIterator<T> for <a class="struct" href="../../../../nom/lib/std/collections/struct.BinaryHeap.html" title="struct nom::lib::std::collections::BinaryHeap">BinaryHeap</a><T> <span class="where fmt-newline">where<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-FromIterator%3CT%3E-1' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/collections/binary_heap.rs.html#1303-1307' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-22' class="method hidden"><code id='from_iter.v-23'>fn <a href='#method.from_iter-22' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="../../../../nom/lib/std/collections/struct.BinaryHeap.html" title="struct nom::lib::std::collections::BinaryHeap">BinaryHeap</a><T> <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 = T>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/collections/binary_heap.rs.html#1304-1306' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CT%3E-2' class='impl'><code class='in-band'>impl<T> FromIterator<T> for <a class="struct" href="../../../../nom/lib/std/collections/struct.LinkedList.html" title="struct nom::lib::std::collections::LinkedList">LinkedList</a><T></code><a href='#impl-FromIterator%3CT%3E-2' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/collections/linked_list.rs.html#1675-1681' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-23' class="method hidden"><code id='from_iter.v-24'>fn <a href='#method.from_iter-23' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="../../../../nom/lib/std/collections/struct.LinkedList.html" title="struct nom::lib::std::collections::LinkedList">LinkedList</a><T> <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 = T>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/collections/linked_list.rs.html#1676-1680' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CT%3E-3' class='impl'><code class='in-band'>impl<T> FromIterator<T> for <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.Vec.html" title="struct nom::lib::std::prelude::v1::v1::Vec">Vec</a><T></code><a href='#impl-FromIterator%3CT%3E-3' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/vec.rs.html#1923-1928' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-24' class="method hidden"><code id='from_iter.v-25'>fn <a href='#method.from_iter-24' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="../../../../nom/lib/std/prelude/v1/v1/struct.Vec.html" title="struct nom::lib::std::prelude::v1::v1::Vec">Vec</a><T> <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 = T>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/alloc/vec.rs.html#1925-1927' title='goto source code'>[src]</a></h4></div><h3 id='impl-FromIterator%3CT%3E-4' class='impl'><code class='in-band'>impl<T, S> FromIterator<T> for nom::lib::std::collections::<a class="struct" href="../../../../nom/lib/std/collections/struct.HashSet.html" title="struct nom::lib::std::collections::HashSet">HashSet</a><T, S> <span class="where fmt-newline">where<br> S: <a class="trait" href="../../../../nom/lib/std/hash/trait.BuildHasher.html" title="trait nom::lib::std::hash::BuildHasher">BuildHasher</a> + <a class="trait" href="../../../../nom/lib/std/prelude/v1/v1/trait.Default.html" title="trait nom::lib::std::prelude::v1::v1::Default">Default</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> + <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-FromIterator%3CT%3E-4' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/collections/hash/set.rs.html#939-950' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from_iter-25' class="method hidden"><code id='from_iter.v-26'>fn <a href='#method.from_iter-25' class='fnname'>from_iter</a><I>(iter: I) -> <a class="struct" href="../../../../nom/lib/std/collections/struct.HashSet.html" title="struct nom::lib::std::collections::HashSet">HashSet</a><T, S> <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 = T>, </span></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/std/collections/hash/set.rs.html#945-949' title='goto source code'>[src]</a></h4></div></div><span class='loading-content'>Loading content...</span><script type="text/javascript" src="../../../../implementors/core/iter/traits/collect/trait.FromIterator.js" async></script></section><section id="search" class="content hidden"></section><section class="footer"></section><script>window.rootPath = "../../../../";window.currentCrate = "nom";</script><script src="../../../../aliases.js"></script><script src="../../../../main.js"></script><script defer src="../../../../search-index.js"></script></body></html> |