| <!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="A set of HTTP headers"><meta name="keywords" content="rust, rustlang, rust-lang, HeaderMap"><title>HeaderMap in http::header - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" 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href="../../http/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../http/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">HeaderMap</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block"><li><a href="#method.append">append</a></li><li><a href="#method.capacity">capacity</a></li><li><a href="#method.clear">clear</a></li><li><a href="#method.contains_key">contains_key</a></li><li><a href="#method.drain">drain</a></li><li><a href="#method.entry">entry</a></li><li><a href="#method.get">get</a></li><li><a href="#method.get_all">get_all</a></li><li><a href="#method.get_mut">get_mut</a></li><li><a href="#method.insert">insert</a></li><li><a href="#method.is_empty">is_empty</a></li><li><a href="#method.iter">iter</a></li><li><a href="#method.iter_mut">iter_mut</a></li><li><a href="#method.keys">keys</a></li><li><a href="#method.keys_len">keys_len</a></li><li><a href="#method.len">len</a></li><li><a href="#method.new">new</a></li><li><a href="#method.remove">remove</a></li><li><a href="#method.reserve">reserve</a></li><li><a href="#method.try_entry">try_entry</a></li><li><a href="#method.values">values</a></li><li><a href="#method.values_mut">values_mut</a></li><li><a href="#method.with_capacity">with_capacity</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block"><li><a href="#impl-Clone-for-HeaderMap%3CT%3E">Clone</a></li><li><a href="#impl-Debug-for-HeaderMap%3CT%3E">Debug</a></li><li><a href="#impl-Default-for-HeaderMap%3CT%3E">Default</a></li><li><a href="#impl-Eq-for-HeaderMap%3CT%3E">Eq</a></li><li><a href="#impl-Extend%3C(HeaderName%2C%20T)%3E-for-HeaderMap%3CT%3E">Extend<(HeaderName, T)></a></li><li><a href="#impl-Extend%3C(Option%3CHeaderName%3E%2C%20T)%3E-for-HeaderMap%3CT%3E">Extend<(Option<HeaderName>, T)></a></li><li><a href="#impl-FromIterator%3C(HeaderName%2C%20T)%3E-for-HeaderMap%3CT%3E">FromIterator<(HeaderName, T)></a></li><li><a href="#impl-Index%3CK%3E-for-HeaderMap%3CT%3E">Index<K></a></li><li><a href="#impl-IntoIterator-for-%26%27a%20HeaderMap%3CT%3E">IntoIterator</a></li><li><a href="#impl-IntoIterator-for-%26%27a%20mut%20HeaderMap%3CT%3E">IntoIterator</a></li><li><a href="#impl-IntoIterator-for-HeaderMap%3CT%3E">IntoIterator</a></li><li><a href="#impl-PartialEq%3CHeaderMap%3CT%3E%3E-for-HeaderMap%3CT%3E">PartialEq<HeaderMap<T>></a></li><li><a href="#impl-TryFrom%3C%26%27a%20HashMap%3CK%2C%20V%2C%20RandomState%3E%3E-for-HeaderMap%3CT%3E">TryFrom<&'a HashMap<K, V, RandomState>></a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block"><li><a href="#impl-RefUnwindSafe-for-HeaderMap%3CT%3E">RefUnwindSafe</a></li><li><a href="#impl-Send-for-HeaderMap%3CT%3E">Send</a></li><li><a href="#impl-Sync-for-HeaderMap%3CT%3E">Sync</a></li><li><a href="#impl-Unpin-for-HeaderMap%3CT%3E">Unpin</a></li><li><a href="#impl-UnwindSafe-for-HeaderMap%3CT%3E">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block"><li><a href="#impl-Any-for-HeaderMap%3CT%3E">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-HeaderMap%3CT%3E">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-HeaderMap%3CT%3E">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E-for-HeaderMap%3CT%3E">From<T></a></li><li><a href="#impl-Into%3CU%3E-for-HeaderMap%3CT%3E">Into<U></a></li><li><a href="#impl-ToOwned-for-HeaderMap%3CT%3E">ToOwned</a></li><li><a href="#impl-TryFrom%3CU%3E-for-HeaderMap%3CT%3E">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-HeaderMap%3CT%3E">TryInto<U></a></li></ul></section><h2><a href="index.html">In http::header</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1 class="fqn">Struct <a href="../index.html">http</a>::<wbr><a href="index.html">header</a>::<wbr><a class="struct" href="#">HeaderMap</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../../src/http/header/map.rs.html#45-52">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="item-decl"><pre class="rust struct"><code>pub struct HeaderMap<T = <a class="struct" href="struct.HeaderValue.html" title="struct http::header::HeaderValue">HeaderValue</a>> { /* private fields */ }</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A set of HTTP headers</p> |
| <p><code>HeaderMap</code> is an multimap of <a href="struct.HeaderName.html"><code>HeaderName</code></a> to values.</p> |
| <h2 id="examples"><a href="#examples">Examples</a></h2> |
| <p>Basic usage</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>headers = HeaderMap::new(); |
| |
| headers.insert(HOST, <span class="string">"example.com"</span>.parse().unwrap()); |
| headers.insert(CONTENT_LENGTH, <span class="string">"123"</span>.parse().unwrap()); |
| |
| <span class="macro">assert!</span>(headers.contains_key(HOST)); |
| <span class="macro">assert!</span>(!headers.contains_key(LOCATION)); |
| |
| <span class="macro">assert_eq!</span>(headers[HOST], <span class="string">"example.com"</span>); |
| |
| headers.remove(HOST); |
| |
| <span class="macro">assert!</span>(!headers.contains_key(HOST));</code></pre></div> |
| </div></details><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><div id="implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-HeaderMap" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#426-444">source</a><a href="#impl-HeaderMap" class="anchor"></a><h3 class="code-header">impl <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.new" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#441-443">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fnname">new</a>() -> Self</h4></section></summary><div class="docblock"><p>Create an empty <code>HeaderMap</code>.</p> |
| <p>The map will be created without any capacity. This function will not |
| allocate.</p> |
| <h5 id="examples-1"><a href="#examples-1">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>map = HeaderMap::new(); |
| |
| <span class="macro">assert!</span>(map.is_empty()); |
| <span class="macro">assert_eq!</span>(<span class="number">0</span>, map.capacity());</code></pre></div> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#446-1591">source</a><a href="#impl-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.with_capacity" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#465-487">source</a><h4 class="code-header">pub fn <a href="#method.with_capacity" class="fnname">with_capacity</a>(capacity: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h4></section></summary><div class="docblock"><p>Create an empty <code>HeaderMap</code> with the specified capacity.</p> |
| <p>The returned map will allocate internal storage in order to hold about |
| <code>capacity</code> elements without reallocating. However, this is a “best |
| effort” as there are usage patterns that could cause additional |
| allocations before <code>capacity</code> headers are stored in the map.</p> |
| <p>More capacity than requested may be allocated.</p> |
| <h5 id="examples-2"><a href="#examples-2">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>map: HeaderMap<u32> = HeaderMap::with_capacity(<span class="number">10</span>); |
| |
| <span class="macro">assert!</span>(map.is_empty()); |
| <span class="macro">assert_eq!</span>(<span class="number">12</span>, map.capacity());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.len" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#513-515">source</a><h4 class="code-header">pub fn <a href="#method.len" class="fnname">len</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Returns the number of headers stored in the map.</p> |
| <p>This number represents the total number of <strong>values</strong> stored in the map. |
| This number can be greater than or equal to the number of <strong>keys</strong> |
| stored given that a single key may have more than one associated value.</p> |
| <h5 id="examples-3"><a href="#examples-3">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| |
| <span class="macro">assert_eq!</span>(<span class="number">0</span>, map.len()); |
| |
| map.insert(ACCEPT, <span class="string">"text/plain"</span>.parse().unwrap()); |
| map.insert(HOST, <span class="string">"localhost"</span>.parse().unwrap()); |
| |
| <span class="macro">assert_eq!</span>(<span class="number">2</span>, map.len()); |
| |
| map.append(ACCEPT, <span class="string">"text/html"</span>.parse().unwrap()); |
| |
| <span class="macro">assert_eq!</span>(<span class="number">3</span>, map.len());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.keys_len" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#540-542">source</a><h4 class="code-header">pub fn <a href="#method.keys_len" class="fnname">keys_len</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Returns the number of keys stored in the map.</p> |
| <p>This number will be less than or equal to <code>len()</code> as each key may have |
| more than one associated value.</p> |
| <h5 id="examples-4"><a href="#examples-4">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| |
| <span class="macro">assert_eq!</span>(<span class="number">0</span>, map.keys_len()); |
| |
| map.insert(ACCEPT, <span class="string">"text/plain"</span>.parse().unwrap()); |
| map.insert(HOST, <span class="string">"localhost"</span>.parse().unwrap()); |
| |
| <span class="macro">assert_eq!</span>(<span class="number">2</span>, map.keys_len()); |
| |
| map.insert(ACCEPT, <span class="string">"text/html"</span>.parse().unwrap()); |
| |
| <span class="macro">assert_eq!</span>(<span class="number">2</span>, map.keys_len());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.is_empty" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#559-561">source</a><h4 class="code-header">pub fn <a href="#method.is_empty" class="fnname">is_empty</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns true if the map contains no elements.</p> |
| <h5 id="examples-5"><a href="#examples-5">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| |
| <span class="macro">assert!</span>(map.is_empty()); |
| |
| map.insert(HOST, <span class="string">"hello.world"</span>.parse().unwrap()); |
| |
| <span class="macro">assert!</span>(!map.is_empty());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.clear" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#578-586">source</a><h4 class="code-header">pub fn <a href="#method.clear" class="fnname">clear</a>(&mut self)</h4></section></summary><div class="docblock"><p>Clears the map, removing all key-value pairs. Keeps the allocated memory |
| for reuse.</p> |
| <h5 id="examples-6"><a href="#examples-6">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| map.insert(HOST, <span class="string">"hello.world"</span>.parse().unwrap()); |
| |
| map.clear(); |
| <span class="macro">assert!</span>(map.is_empty()); |
| <span class="macro">assert!</span>(map.capacity() > <span class="number">0</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.capacity" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#605-607">source</a><h4 class="code-header">pub fn <a href="#method.capacity" class="fnname">capacity</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Returns the number of headers the map can hold without reallocating.</p> |
| <p>This number is an approximation as certain usage patterns could cause |
| additional allocations before the returned capacity is filled.</p> |
| <h5 id="examples-7"><a href="#examples-7">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| |
| <span class="macro">assert_eq!</span>(<span class="number">0</span>, map.capacity()); |
| |
| map.insert(HOST, <span class="string">"hello.world"</span>.parse().unwrap()); |
| <span class="macro">assert_eq!</span>(<span class="number">6</span>, map.capacity());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.reserve" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#631-653">source</a><h4 class="code-header">pub fn <a href="#method.reserve" class="fnname">reserve</a>(&mut self, additional: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</h4></section></summary><div class="docblock"><p>Reserves capacity for at least <code>additional</code> more headers to be inserted |
| into the <code>HeaderMap</code>.</p> |
| <p>The header map may reserve more space to avoid frequent reallocations. |
| Like with <code>with_capacity</code>, this will be a “best effort” to avoid |
| allocations until <code>additional</code> more headers are inserted. Certain usage |
| patterns could cause additional allocations before the number is |
| reached.</p> |
| <h5 id="panics"><a href="#panics">Panics</a></h5> |
| <p>Panics if the new allocation size overflows <code>usize</code>.</p> |
| <h5 id="examples-8"><a href="#examples-8">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| map.reserve(<span class="number">10</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#676-681">source</a><h4 class="code-header">pub fn <a href="#method.get" class="fnname">get</a><K>(&self, key: K) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T><span class="where fmt-newline">where<br> K: <a class="trait" href="trait.AsHeaderName.html" title="trait http::header::AsHeaderName">AsHeaderName</a>,</span></h4></section></summary><div class="docblock"><p>Returns a reference to the value associated with the key.</p> |
| <p>If there are multiple values associated with the key, then the first one |
| is returned. Use <code>get_all</code> to get all values associated with a given |
| key. Returns <code>None</code> if there are no values associated with the key.</p> |
| <h5 id="examples-9"><a href="#examples-9">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| <span class="macro">assert!</span>(map.get(<span class="string">"host"</span>).is_none()); |
| |
| map.insert(HOST, <span class="string">"hello"</span>.parse().unwrap()); |
| <span class="macro">assert_eq!</span>(map.get(HOST).unwrap(), <span class="kw-2">&</span><span class="string">"hello"</span>); |
| <span class="macro">assert_eq!</span>(map.get(<span class="string">"host"</span>).unwrap(), <span class="kw-2">&</span><span class="string">"hello"</span>); |
| |
| map.append(HOST, <span class="string">"world"</span>.parse().unwrap()); |
| <span class="macro">assert_eq!</span>(map.get(<span class="string">"host"</span>).unwrap(), <span class="kw-2">&</span><span class="string">"hello"</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_mut" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#713-724">source</a><h4 class="code-header">pub fn <a href="#method.get_mut" class="fnname">get_mut</a><K>(&mut self, key: K) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T><span class="where fmt-newline">where<br> K: <a class="trait" href="trait.AsHeaderName.html" title="trait http::header::AsHeaderName">AsHeaderName</a>,</span></h4></section></summary><div class="docblock"><p>Returns a mutable reference to the value associated with the key.</p> |
| <p>If there are multiple values associated with the key, then the first one |
| is returned. Use <code>entry</code> to get all values associated with a given |
| key. Returns <code>None</code> if there are no values associated with the key.</p> |
| <h5 id="examples-10"><a href="#examples-10">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::default(); |
| map.insert(HOST, <span class="string">"hello"</span>.to_string()); |
| map.get_mut(<span class="string">"host"</span>).unwrap().push_str(<span class="string">"-world"</span>); |
| |
| <span class="macro">assert_eq!</span>(map.get(HOST).unwrap(), <span class="kw-2">&</span><span class="string">"hello-world"</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_all" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#751-759">source</a><h4 class="code-header">pub fn <a href="#method.get_all" class="fnname">get_all</a><K>(&self, key: K) -> <a class="struct" href="struct.GetAll.html" title="struct http::header::GetAll">GetAll</a><'_, T><span class="where fmt-newline">where<br> K: <a class="trait" href="trait.AsHeaderName.html" title="trait http::header::AsHeaderName">AsHeaderName</a>,</span></h4></section></summary><div class="docblock"><p>Returns a view of all values associated with a key.</p> |
| <p>The returned view does not incur any allocations and allows iterating |
| the values associated with the key. See <a href="struct.GetAll.html"><code>GetAll</code></a> for more details. |
| Returns <code>None</code> if there are no values associated with the key.</p> |
| <h5 id="examples-11"><a href="#examples-11">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| |
| map.insert(HOST, <span class="string">"hello"</span>.parse().unwrap()); |
| map.append(HOST, <span class="string">"goodbye"</span>.parse().unwrap()); |
| |
| <span class="kw">let </span>view = map.get_all(<span class="string">"host"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>iter = view.iter(); |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&</span><span class="string">"hello"</span>, iter.next().unwrap()); |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&</span><span class="string">"goodbye"</span>, iter.next().unwrap()); |
| <span class="macro">assert!</span>(iter.next().is_none());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.contains_key" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#774-779">source</a><h4 class="code-header">pub fn <a href="#method.contains_key" class="fnname">contains_key</a><K>(&self, key: K) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a><span class="where fmt-newline">where<br> K: <a class="trait" href="trait.AsHeaderName.html" title="trait http::header::AsHeaderName">AsHeaderName</a>,</span></h4></section></summary><div class="docblock"><p>Returns true if the map contains a value for the specified key.</p> |
| <h5 id="examples-12"><a href="#examples-12">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| <span class="macro">assert!</span>(!map.contains_key(HOST)); |
| |
| map.insert(HOST, <span class="string">"world"</span>.parse().unwrap()); |
| <span class="macro">assert!</span>(map.contains_key(<span class="string">"host"</span>));</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.iter" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#802-811">source</a><h4 class="code-header">pub fn <a href="#method.iter" class="fnname">iter</a>(&self) -> <a class="struct" href="struct.Iter.html" title="struct http::header::Iter">Iter</a><'_, T><span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<span class="notable-traits-tooltiptext"><span class="docblock"><span class="notable">Notable traits for <a class="struct" href="struct.Iter.html" title="struct http::header::Iter">Iter</a><'a, T></span><code class="content"><span class="where fmt-newline">impl<'a, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a> for <a class="struct" href="struct.Iter.html" title="struct http::header::Iter">Iter</a><'a, T></span><span class="where fmt-newline"> type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item" class="associatedtype">Item</a> = (&'a <a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>T);</span></code></span></span></span></span></h4></section></summary><div class="docblock"><p>An iterator visiting all key-value pairs.</p> |
| <p>The iteration order is arbitrary, but consistent across platforms for |
| the same crate version. Each key will be yielded once per associated |
| value. So, if a key has 3 associated values, it will be yielded 3 times.</p> |
| <h5 id="examples-13"><a href="#examples-13">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| |
| map.insert(HOST, <span class="string">"hello"</span>.parse().unwrap()); |
| map.append(HOST, <span class="string">"goodbye"</span>.parse().unwrap()); |
| map.insert(CONTENT_LENGTH, <span class="string">"123"</span>.parse().unwrap()); |
| |
| <span class="kw">for </span>(key, value) <span class="kw">in </span>map.iter() { |
| <span class="macro">println!</span>(<span class="string">"{:?}: {:?}"</span>, key, value); |
| }</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.iter_mut" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#834-841">source</a><h4 class="code-header">pub fn <a href="#method.iter_mut" class="fnname">iter_mut</a>(&mut self) -> <a class="struct" href="struct.IterMut.html" title="struct http::header::IterMut">IterMut</a><'_, T><span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<span class="notable-traits-tooltiptext"><span class="docblock"><span class="notable">Notable traits for <a class="struct" href="struct.IterMut.html" title="struct http::header::IterMut">IterMut</a><'a, T></span><code class="content"><span class="where fmt-newline">impl<'a, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a> for <a class="struct" href="struct.IterMut.html" title="struct http::header::IterMut">IterMut</a><'a, T></span><span class="where fmt-newline"> type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item" class="associatedtype">Item</a> = (&'a <a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a mut </a>T);</span></code></span></span></span></span></h4></section></summary><div class="docblock"><p>An iterator visiting all key-value pairs, with mutable value references.</p> |
| <p>The iterator order is arbitrary, but consistent across platforms for the |
| same crate version. Each key will be yielded once per associated value, |
| so if a key has 3 associated values, it will be yielded 3 times.</p> |
| <h5 id="examples-14"><a href="#examples-14">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::default(); |
| |
| map.insert(HOST, <span class="string">"hello"</span>.to_string()); |
| map.append(HOST, <span class="string">"goodbye"</span>.to_string()); |
| map.insert(CONTENT_LENGTH, <span class="string">"123"</span>.to_string()); |
| |
| <span class="kw">for </span>(key, value) <span class="kw">in </span>map.iter_mut() { |
| value.push_str(<span class="string">"-boop"</span>); |
| }</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.keys" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#864-868">source</a><h4 class="code-header">pub fn <a href="#method.keys" class="fnname">keys</a>(&self) -> <a class="struct" href="struct.Keys.html" title="struct http::header::Keys">Keys</a><'_, T><span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<span class="notable-traits-tooltiptext"><span class="docblock"><span class="notable">Notable traits for <a class="struct" href="struct.Keys.html" title="struct http::header::Keys">Keys</a><'a, T></span><code class="content"><span class="where fmt-newline">impl<'a, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a> for <a class="struct" href="struct.Keys.html" title="struct http::header::Keys">Keys</a><'a, T></span><span class="where fmt-newline"> type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item" class="associatedtype">Item</a> = &'a <a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>;</span></code></span></span></span></span></h4></section></summary><div class="docblock"><p>An iterator visiting all keys.</p> |
| <p>The iteration order is arbitrary, but consistent across platforms for |
| the same crate version. Each key will be yielded only once even if it |
| has multiple associated values.</p> |
| <h5 id="examples-15"><a href="#examples-15">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| |
| map.insert(HOST, <span class="string">"hello"</span>.parse().unwrap()); |
| map.append(HOST, <span class="string">"goodbye"</span>.parse().unwrap()); |
| map.insert(CONTENT_LENGTH, <span class="string">"123"</span>.parse().unwrap()); |
| |
| <span class="kw">for </span>key <span class="kw">in </span>map.keys() { |
| <span class="macro">println!</span>(<span class="string">"{:?}"</span>, key); |
| }</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.values" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#890-892">source</a><h4 class="code-header">pub fn <a href="#method.values" class="fnname">values</a>(&self) -> <a class="struct" href="struct.Values.html" title="struct http::header::Values">Values</a><'_, T><span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<span class="notable-traits-tooltiptext"><span class="docblock"><span class="notable">Notable traits for <a class="struct" href="struct.Values.html" title="struct http::header::Values">Values</a><'a, T></span><code class="content"><span class="where fmt-newline">impl<'a, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a> for <a class="struct" href="struct.Values.html" title="struct http::header::Values">Values</a><'a, T></span><span class="where fmt-newline"> type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item" class="associatedtype">Item</a> = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>T;</span></code></span></span></span></span></h4></section></summary><div class="docblock"><p>An iterator visiting all values.</p> |
| <p>The iteration order is arbitrary, but consistent across platforms for |
| the same crate version.</p> |
| <h5 id="examples-16"><a href="#examples-16">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| |
| map.insert(HOST, <span class="string">"hello"</span>.parse().unwrap()); |
| map.append(HOST, <span class="string">"goodbye"</span>.parse().unwrap()); |
| map.insert(CONTENT_LENGTH, <span class="string">"123"</span>.parse().unwrap()); |
| |
| <span class="kw">for </span>value <span class="kw">in </span>map.values() { |
| <span class="macro">println!</span>(<span class="string">"{:?}"</span>, value); |
| }</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.values_mut" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#914-918">source</a><h4 class="code-header">pub fn <a href="#method.values_mut" class="fnname">values_mut</a>(&mut self) -> <a class="struct" href="struct.ValuesMut.html" title="struct http::header::ValuesMut">ValuesMut</a><'_, T><span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<span class="notable-traits-tooltiptext"><span class="docblock"><span class="notable">Notable traits for <a class="struct" href="struct.ValuesMut.html" title="struct http::header::ValuesMut">ValuesMut</a><'a, T></span><code class="content"><span class="where fmt-newline">impl<'a, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a> for <a class="struct" href="struct.ValuesMut.html" title="struct http::header::ValuesMut">ValuesMut</a><'a, T></span><span class="where fmt-newline"> type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item" class="associatedtype">Item</a> = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a mut </a>T;</span></code></span></span></span></span></h4></section></summary><div class="docblock"><p>An iterator visiting all values mutably.</p> |
| <p>The iteration order is arbitrary, but consistent across platforms for |
| the same crate version.</p> |
| <h5 id="examples-17"><a href="#examples-17">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::default(); |
| |
| map.insert(HOST, <span class="string">"hello"</span>.to_string()); |
| map.append(HOST, <span class="string">"goodbye"</span>.to_string()); |
| map.insert(CONTENT_LENGTH, <span class="string">"123"</span>.to_string()); |
| |
| <span class="kw">for </span>value <span class="kw">in </span>map.values_mut() { |
| value.push_str(<span class="string">"-boop"</span>); |
| }</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.drain" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#949-974">source</a><h4 class="code-header">pub fn <a href="#method.drain" class="fnname">drain</a>(&mut self) -> <a class="struct" href="struct.Drain.html" title="struct http::header::Drain">Drain</a><'_, T><span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<span class="notable-traits-tooltiptext"><span class="docblock"><span class="notable">Notable traits for <a class="struct" href="struct.Drain.html" title="struct http::header::Drain">Drain</a><'a, T></span><code class="content"><span class="where fmt-newline">impl<'a, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a> for <a class="struct" href="struct.Drain.html" title="struct http::header::Drain">Drain</a><'a, T></span><span class="where fmt-newline"> type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item" class="associatedtype">Item</a> = (<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>>, T);</span></code></span></span></span></span></h4></section></summary><div class="docblock"><p>Clears the map, returning all entries as an iterator.</p> |
| <p>The internal memory is kept for reuse.</p> |
| <p>For each yielded item that has <code>None</code> provided for the <code>HeaderName</code>, |
| then the associated header name is the same as that of the previously |
| yielded item. The first yielded item will have <code>HeaderName</code> set.</p> |
| <h5 id="examples-18"><a href="#examples-18">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| |
| map.insert(HOST, <span class="string">"hello"</span>.parse().unwrap()); |
| map.append(HOST, <span class="string">"goodbye"</span>.parse().unwrap()); |
| map.insert(CONTENT_LENGTH, <span class="string">"123"</span>.parse().unwrap()); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>drain = map.drain(); |
| |
| |
| <span class="macro">assert_eq!</span>(drain.next(), <span class="prelude-val">Some</span>((<span class="prelude-val">Some</span>(HOST), <span class="string">"hello"</span>.parse().unwrap()))); |
| <span class="macro">assert_eq!</span>(drain.next(), <span class="prelude-val">Some</span>((<span class="prelude-val">None</span>, <span class="string">"goodbye"</span>.parse().unwrap()))); |
| |
| <span class="macro">assert_eq!</span>(drain.next(), <span class="prelude-val">Some</span>((<span class="prelude-val">Some</span>(CONTENT_LENGTH), <span class="string">"123"</span>.parse().unwrap()))); |
| |
| <span class="macro">assert_eq!</span>(drain.next(), <span class="prelude-val">None</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.entry" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1044-1049">source</a><h4 class="code-header">pub fn <a href="#method.entry" class="fnname">entry</a><K>(&mut self, key: K) -> <a class="enum" href="enum.Entry.html" title="enum http::header::Entry">Entry</a><'_, T><span class="where fmt-newline">where<br> K: <a class="trait" href="trait.IntoHeaderName.html" title="trait http::header::IntoHeaderName">IntoHeaderName</a>,</span></h4></section></summary><div class="docblock"><p>Gets the given key’s corresponding entry in the map for in-place |
| manipulation.</p> |
| <h5 id="examples-19"><a href="#examples-19">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map: HeaderMap<u32> = HeaderMap::default(); |
| |
| <span class="kw">let </span>headers = <span class="kw-2">&</span>[ |
| <span class="string">"content-length"</span>, |
| <span class="string">"x-hello"</span>, |
| <span class="string">"Content-Length"</span>, |
| <span class="string">"x-world"</span>, |
| ]; |
| |
| <span class="kw">for </span><span class="kw-2">&</span>header <span class="kw">in </span>headers { |
| <span class="kw">let </span>counter = map.entry(header).or_insert(<span class="number">0</span>); |
| <span class="kw-2">*</span>counter += <span class="number">1</span>; |
| } |
| |
| <span class="macro">assert_eq!</span>(map[<span class="string">"content-length"</span>], <span class="number">2</span>); |
| <span class="macro">assert_eq!</span>(map[<span class="string">"x-hello"</span>], <span class="number">1</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_entry" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1060-1065">source</a><h4 class="code-header">pub fn <a href="#method.try_entry" class="fnname">try_entry</a><K>(&mut self, key: K) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="enum" href="enum.Entry.html" title="enum http::header::Entry">Entry</a><'_, T>, <a class="struct" href="struct.InvalidHeaderName.html" title="struct http::header::InvalidHeaderName">InvalidHeaderName</a>><span class="where fmt-newline">where<br> K: <a class="trait" href="trait.AsHeaderName.html" title="trait http::header::AsHeaderName">AsHeaderName</a>,</span></h4></section></summary><div class="docblock"><p>Gets the given key’s corresponding entry in the map for in-place |
| manipulation.</p> |
| <h5 id="errors"><a href="#errors">Errors</a></h5> |
| <p>This method differs from <code>entry</code> by allowing types that may not be |
| valid <code>HeaderName</code>s to passed as the key (such as <code>String</code>). If they |
| do not parse as a valid <code>HeaderName</code>, this returns an |
| <code>InvalidHeaderName</code> error.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.insert" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1131-1136">source</a><h4 class="code-header">pub fn <a href="#method.insert" class="fnname">insert</a><K>(&mut self, key: K, val: T) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><T><span class="where fmt-newline">where<br> K: <a class="trait" href="trait.IntoHeaderName.html" title="trait http::header::IntoHeaderName">IntoHeaderName</a>,</span></h4></section></summary><div class="docblock"><p>Inserts a key-value pair into the map.</p> |
| <p>If the map did not previously have this key present, then <code>None</code> is |
| returned.</p> |
| <p>If the map did have this key present, the new value is associated with |
| the key and all previous values are removed. <strong>Note</strong> that only a single |
| one of the previous values is returned. If there are multiple values |
| that have been previously associated with the key, then the first one is |
| returned. See <code>insert_mult</code> on <code>OccupiedEntry</code> for an API that returns |
| all values.</p> |
| <p>The key is not updated, though; this matters for types that can be <code>==</code> |
| without being identical.</p> |
| <h5 id="examples-20"><a href="#examples-20">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| <span class="macro">assert!</span>(map.insert(HOST, <span class="string">"world"</span>.parse().unwrap()).is_none()); |
| <span class="macro">assert!</span>(!map.is_empty()); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>prev = map.insert(HOST, <span class="string">"earth"</span>.parse().unwrap()).unwrap(); |
| <span class="macro">assert_eq!</span>(<span class="string">"world"</span>, prev);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.append" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1234-1239">source</a><h4 class="code-header">pub fn <a href="#method.append" class="fnname">append</a><K>(&mut self, key: K, value: T) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a><span class="where fmt-newline">where<br> K: <a class="trait" href="trait.IntoHeaderName.html" title="trait http::header::IntoHeaderName">IntoHeaderName</a>,</span></h4></section></summary><div class="docblock"><p>Inserts a key-value pair into the map.</p> |
| <p>If the map did not previously have this key present, then <code>false</code> is |
| returned.</p> |
| <p>If the map did have this key present, the new value is pushed to the end |
| of the list of values currently associated with the key. The key is not |
| updated, though; this matters for types that can be <code>==</code> without being |
| identical.</p> |
| <h5 id="examples-21"><a href="#examples-21">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| <span class="macro">assert!</span>(map.insert(HOST, <span class="string">"world"</span>.parse().unwrap()).is_none()); |
| <span class="macro">assert!</span>(!map.is_empty()); |
| |
| map.append(HOST, <span class="string">"earth"</span>.parse().unwrap()); |
| |
| <span class="kw">let </span>values = map.get_all(<span class="string">"host"</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>i = values.iter(); |
| <span class="macro">assert_eq!</span>(<span class="string">"world"</span>, <span class="kw-2">*</span>i.next().unwrap()); |
| <span class="macro">assert_eq!</span>(<span class="string">"earth"</span>, <span class="kw-2">*</span>i.next().unwrap());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.remove" class="method has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1353-1369">source</a><h4 class="code-header">pub fn <a href="#method.remove" class="fnname">remove</a><K>(&mut self, key: K) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><T><span class="where fmt-newline">where<br> K: <a class="trait" href="trait.AsHeaderName.html" title="trait http::header::AsHeaderName">AsHeaderName</a>,</span></h4></section></summary><div class="docblock"><p>Removes a key from the map, returning the value associated with the key.</p> |
| <p>Returns <code>None</code> if the map does not contain the key. If there are |
| multiple values associated with the key, then the first one is returned. |
| See <code>remove_entry_mult</code> on <code>OccupiedEntry</code> for an API that yields all |
| values.</p> |
| <h5 id="examples-22"><a href="#examples-22">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| map.insert(HOST, <span class="string">"hello.world"</span>.parse().unwrap()); |
| |
| <span class="kw">let </span>prev = map.remove(HOST).unwrap(); |
| <span class="macro">assert_eq!</span>(<span class="string">"hello.world"</span>, prev); |
| |
| <span class="macro">assert!</span>(map.remove(HOST).is_none());</code></pre></div> |
| </div></details></div></details></div><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Clone-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#44">source</a><a href="#impl-Clone-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.clone" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#44">source</a><a href="#method.clone" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone" class="fnname">clone</a>(&self) -> <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h4></section></summary><div class='docblock'>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.clone_from" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/clone.rs.html#132-134">source</a></span><a href="#method.clone_from" class="anchor"></a><h4 class="code-header">const fn <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from" class="fnname">clone_from</a>(&mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>Self)</h4></section></summary><div class='docblock'>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Debug-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1978-1982">source</a><a href="#impl-Debug-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1979-1981">source</a><a href="#method.fmt" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt" class="fnname">fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Default-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1984-1988">source</a><a href="#impl-Default-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html" title="trait core::default::Default">Default</a> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.default" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1985-1987">source</a><a href="#method.default" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default" class="fnname">default</a>() -> Self</h4></section></summary><div class='docblock'>Returns the “default value” for a type. <a href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Extend%3C(HeaderName%2C%20T)%3E-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1943-1963">source</a><a href="#impl-Extend%3C(HeaderName%2C%20T)%3E-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.Extend.html" title="trait core::iter::traits::collect::Extend">Extend</a><(<a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>, T)> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.extend-1" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1944-1962">source</a><a href="#method.extend-1" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.Extend.html#tymethod.extend" class="fnname">extend</a><I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a><Item = (<a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>, T)>>(&mut self, iter: I)</h4></section></summary><div class='docblock'>Extends a collection with the contents of an iterator. <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.Extend.html#tymethod.extend">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.extend_one-1" class="method trait-impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/iter/traits/collect.rs.html#372">source</a><a href="#method.extend_one-1" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.Extend.html#method.extend_one" class="fnname">extend_one</a>(&mut self, item: A)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>extend_one</code>)</span></div></span><div class='docblock'>Extends a collection with exactly one element.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.extend_reserve-1" class="method trait-impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/iter/traits/collect.rs.html#380">source</a><a href="#method.extend_reserve-1" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.Extend.html#method.extend_reserve" class="fnname">extend_reserve</a>(&mut self, additional: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>extend_one</code>)</span></div></span><div class='docblock'>Reserves capacity in a collection for the given number of additional elements. <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.Extend.html#method.extend_reserve">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Extend%3C(Option%3CHeaderName%3E%2C%20T)%3E-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1863-1941">source</a><a href="#impl-Extend%3C(Option%3CHeaderName%3E%2C%20T)%3E-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.Extend.html" title="trait core::iter::traits::collect::Extend">Extend</a><(<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>>, T)> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.extend" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1900-1940">source</a><a href="#method.extend" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.Extend.html#tymethod.extend" class="fnname">extend</a><I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a><Item = (<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>>, T)>>(&mut self, iter: I)</h4></section></summary><div class="docblock"><p>Extend a <code>HeaderMap</code> with the contents of another <code>HeaderMap</code>.</p> |
| <p>This function expects the yielded items to follow the same structure as |
| <code>IntoIter</code>.</p> |
| <h5 id="panics-1"><a href="#panics-1">Panics</a></h5> |
| <p>This panics if the first yielded item does not have a <code>HeaderName</code>.</p> |
| <h5 id="examples-25"><a href="#examples-25">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| |
| map.insert(ACCEPT, <span class="string">"text/plain"</span>.parse().unwrap()); |
| map.insert(HOST, <span class="string">"hello.world"</span>.parse().unwrap()); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>extra = HeaderMap::new(); |
| |
| extra.insert(HOST, <span class="string">"foo.bar"</span>.parse().unwrap()); |
| extra.insert(COOKIE, <span class="string">"hello"</span>.parse().unwrap()); |
| extra.append(COOKIE, <span class="string">"world"</span>.parse().unwrap()); |
| |
| map.extend(extra); |
| |
| <span class="macro">assert_eq!</span>(map[<span class="string">"host"</span>], <span class="string">"foo.bar"</span>); |
| <span class="macro">assert_eq!</span>(map[<span class="string">"accept"</span>], <span class="string">"text/plain"</span>); |
| <span class="macro">assert_eq!</span>(map[<span class="string">"cookie"</span>], <span class="string">"hello"</span>); |
| |
| <span class="kw">let </span>v = map.get_all(<span class="string">"host"</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">1</span>, v.iter().count()); |
| |
| <span class="kw">let </span>v = map.get_all(<span class="string">"cookie"</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">2</span>, v.iter().count());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.extend_one" class="method trait-impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/iter/traits/collect.rs.html#372">source</a><a href="#method.extend_one" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.Extend.html#method.extend_one" class="fnname">extend_one</a>(&mut self, item: A)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>extend_one</code>)</span></div></span><div class='docblock'>Extends a collection with exactly one element.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.extend_reserve" class="method trait-impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/iter/traits/collect.rs.html#380">source</a><a href="#method.extend_reserve" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.Extend.html#method.extend_reserve" class="fnname">extend_reserve</a>(&mut self, additional: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</h4></section></summary><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>extend_one</code>)</span></div></span><div class='docblock'>Reserves capacity in a collection for the given number of additional elements. <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.Extend.html#method.extend_reserve">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-FromIterator%3C(HeaderName%2C%20T)%3E-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1816-1825">source</a><a href="#impl-FromIterator%3C(HeaderName%2C%20T)%3E-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.FromIterator.html" title="trait core::iter::traits::collect::FromIterator">FromIterator</a><(<a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>, T)> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from_iter" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1817-1824">source</a><a href="#method.from_iter" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.FromIterator.html#tymethod.from_iter" class="fnname">from_iter</a><I>(iter: I) -> Self<span class="where fmt-newline">where<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a><Item = (<a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>, T)>,</span></h4></section></summary><div class='docblock'>Creates a value from an iterator. <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.FromIterator.html#tymethod.from_iter">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Index%3CK%3E-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1990-2005">source</a><a href="#impl-Index%3CK%3E-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<'a, K, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/index/trait.Index.html" title="trait core::ops::index::Index">Index</a><K> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T><span class="where fmt-newline">where<br> K: <a class="trait" href="trait.AsHeaderName.html" title="trait http::header::AsHeaderName">AsHeaderName</a>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.index" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1999-2004">source</a><a href="#method.index" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/ops/index/trait.Index.html#tymethod.index" class="fnname">index</a>(&self, index: K) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T</h4></section></summary><div class="docblock"><h5 id="panics-2"><a href="#panics-2">Panics</a></h5> |
| <p>Using the index operator will cause a panic if the header you’re querying isn’t set.</p> |
| </div></details><details class="rustdoc-toggle" open><summary><section id="associatedtype.Output" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Output" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/ops/index/trait.Index.html#associatedtype.Output" class="associatedtype">Output</a> = T</h4></section></summary><div class='docblock'>The returned type after indexing.</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-IntoIterator-for-%26%27a%20HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1736-1743">source</a><a href="#impl-IntoIterator-for-%26%27a%20HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<'a, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a> for &'a <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Item" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Item" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.Item" class="associatedtype">Item</a> = (&'a <a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>T)</h4></section></summary><div class='docblock'>The type of the elements being iterated over.</div></details><details class="rustdoc-toggle" open><summary><section id="associatedtype.IntoIter" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.IntoIter" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.IntoIter" class="associatedtype">IntoIter</a> = <a class="struct" href="struct.Iter.html" title="struct http::header::Iter">Iter</a><'a, T></h4></section></summary><div class='docblock'>Which kind of iterator are we turning this into?</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into_iter" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1740-1742">source</a><a href="#method.into_iter" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#tymethod.into_iter" class="fnname">into_iter</a>(self) -> <a class="struct" href="struct.Iter.html" title="struct http::header::Iter">Iter</a><'a, T><span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<span class="notable-traits-tooltiptext"><span class="docblock"><span class="notable">Notable traits for <a class="struct" href="struct.Iter.html" title="struct http::header::Iter">Iter</a><'a, T></span><code class="content"><span class="where fmt-newline">impl<'a, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a> for <a class="struct" href="struct.Iter.html" title="struct http::header::Iter">Iter</a><'a, T></span><span class="where fmt-newline"> type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item" class="associatedtype">Item</a> = (&'a <a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>T);</span></code></span></span></span></span></h4></section></summary><div class='docblock'>Creates an iterator from a value. <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#tymethod.into_iter">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-IntoIterator-for-%26%27a%20mut%20HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1745-1752">source</a><a href="#impl-IntoIterator-for-%26%27a%20mut%20HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<'a, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a> for &'a mut <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Item-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Item-1" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.Item" class="associatedtype">Item</a> = (&'a <a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a mut </a>T)</h4></section></summary><div class='docblock'>The type of the elements being iterated over.</div></details><details class="rustdoc-toggle" open><summary><section id="associatedtype.IntoIter-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.IntoIter-1" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.IntoIter" class="associatedtype">IntoIter</a> = <a class="struct" href="struct.IterMut.html" title="struct http::header::IterMut">IterMut</a><'a, T></h4></section></summary><div class='docblock'>Which kind of iterator are we turning this into?</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into_iter-1" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1749-1751">source</a><a href="#method.into_iter-1" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#tymethod.into_iter" class="fnname">into_iter</a>(self) -> <a class="struct" href="struct.IterMut.html" title="struct http::header::IterMut">IterMut</a><'a, T><span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<span class="notable-traits-tooltiptext"><span class="docblock"><span class="notable">Notable traits for <a class="struct" href="struct.IterMut.html" title="struct http::header::IterMut">IterMut</a><'a, T></span><code class="content"><span class="where fmt-newline">impl<'a, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a> for <a class="struct" href="struct.IterMut.html" title="struct http::header::IterMut">IterMut</a><'a, T></span><span class="where fmt-newline"> type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item" class="associatedtype">Item</a> = (&'a <a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a mut </a>T);</span></code></span></span></span></span></h4></section></summary><div class='docblock'>Creates an iterator from a value. <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#tymethod.into_iter">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-IntoIterator-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1754-1814">source</a><a href="#impl-IntoIterator-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into_iter-2" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1807-1813">source</a><a href="#method.into_iter-2" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#tymethod.into_iter" class="fnname">into_iter</a>(self) -> <a class="struct" href="struct.IntoIter.html" title="struct http::header::IntoIter">IntoIter</a><T><span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<span class="notable-traits-tooltiptext"><span class="docblock"><span class="notable">Notable traits for <a class="struct" href="struct.IntoIter.html" title="struct http::header::IntoIter">IntoIter</a><T></span><code class="content"><span class="where fmt-newline">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a> for <a class="struct" href="struct.IntoIter.html" title="struct http::header::IntoIter">IntoIter</a><T></span><span class="where fmt-newline"> type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item" class="associatedtype">Item</a> = (<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>>, T);</span></code></span></span></span></span></h4></section></summary><div class="docblock"><p>Creates a consuming iterator, that is, one that moves keys and values |
| out of the map in arbitrary order. The map cannot be used after calling |
| this.</p> |
| <p>For each yielded item that has <code>None</code> provided for the <code>HeaderName</code>, |
| then the associated header name is the same as that of the previously |
| yielded item. The first yielded item will have <code>HeaderName</code> set.</p> |
| <h5 id="examples-23"><a href="#examples-23">Examples</a></h5> |
| <p>Basic usage.</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| map.insert(header::CONTENT_LENGTH, <span class="string">"123"</span>.parse().unwrap()); |
| map.insert(header::CONTENT_TYPE, <span class="string">"json"</span>.parse().unwrap()); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>iter = map.into_iter(); |
| <span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>((<span class="prelude-val">Some</span>(header::CONTENT_LENGTH), <span class="string">"123"</span>.parse().unwrap()))); |
| <span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>((<span class="prelude-val">Some</span>(header::CONTENT_TYPE), <span class="string">"json"</span>.parse().unwrap()))); |
| <span class="macro">assert!</span>(iter.next().is_none());</code></pre></div> |
| <p>Multiple values per key.</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>map = HeaderMap::new(); |
| |
| map.append(header::CONTENT_LENGTH, <span class="string">"123"</span>.parse().unwrap()); |
| map.append(header::CONTENT_LENGTH, <span class="string">"456"</span>.parse().unwrap()); |
| |
| map.append(header::CONTENT_TYPE, <span class="string">"json"</span>.parse().unwrap()); |
| map.append(header::CONTENT_TYPE, <span class="string">"html"</span>.parse().unwrap()); |
| map.append(header::CONTENT_TYPE, <span class="string">"xml"</span>.parse().unwrap()); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>iter = map.into_iter(); |
| |
| <span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>((<span class="prelude-val">Some</span>(header::CONTENT_LENGTH), <span class="string">"123"</span>.parse().unwrap()))); |
| <span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>((<span class="prelude-val">None</span>, <span class="string">"456"</span>.parse().unwrap()))); |
| |
| <span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>((<span class="prelude-val">Some</span>(header::CONTENT_TYPE), <span class="string">"json"</span>.parse().unwrap()))); |
| <span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>((<span class="prelude-val">None</span>, <span class="string">"html"</span>.parse().unwrap()))); |
| <span class="macro">assert_eq!</span>(iter.next(), <span class="prelude-val">Some</span>((<span class="prelude-val">None</span>, <span class="string">"xml"</span>.parse().unwrap()))); |
| <span class="macro">assert!</span>(iter.next().is_none());</code></pre></div> |
| </div></details><details class="rustdoc-toggle" open><summary><section id="associatedtype.Item-2" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Item-2" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.Item" class="associatedtype">Item</a> = (<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>>, T)</h4></section></summary><div class='docblock'>The type of the elements being iterated over.</div></details><details class="rustdoc-toggle" open><summary><section id="associatedtype.IntoIter-2" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.IntoIter-2" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.IntoIter" class="associatedtype">IntoIter</a> = <a class="struct" href="struct.IntoIter.html" title="struct http::header::IntoIter">IntoIter</a><T></h4></section></summary><div class='docblock'>Which kind of iterator are we turning this into?</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-PartialEq%3CHeaderMap%3CT%3E%3E-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1965-1974">source</a><a href="#impl-PartialEq%3CHeaderMap%3CT%3E%3E-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a><<a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T>> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.eq" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1966-1973">source</a><a href="#method.eq" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#tymethod.eq" class="fnname">eq</a>(&self, other: &<a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>This method tests for <code>self</code> and <code>other</code> values to be equal, and is used |
| by <code>==</code>. <a href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#tymethod.eq">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.ne" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/cmp.rs.html#227">source</a></span><a href="#method.ne" class="anchor"></a><h4 class="code-header">const fn <a href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#method.ne" class="fnname">ne</a>(&self, other: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>Rhs) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></h4></section></summary><div class='docblock'>This method tests for <code>!=</code>. The default implementation is almost always |
| sufficient, and should not be overridden without very good reason. <a href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#method.ne">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-TryFrom%3C%26%27a%20HashMap%3CK%2C%20V%2C%20RandomState%3E%3E-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1842-1861">source</a><a href="#impl-TryFrom%3C%26%27a%20HashMap%3CK%2C%20V%2C%20RandomState%3E%3E-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<'a, K, V, T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><&'a <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a><K, V, <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.RandomState.html" title="struct std::collections::hash::map::RandomState">RandomState</a>>> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T><span class="where fmt-newline">where<br> K: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a>,<br> <a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>K>,<br> <<a class="struct" href="struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a> as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>K>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="struct" href="../struct.Error.html" title="struct http::Error">Error</a>>,<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>V>,<br> T::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><<a class="struct" href="../struct.Error.html" title="struct http::Error">Error</a>>,</span></h3></section></summary><div class="docblock"><p>Try to convert a <code>HashMap</code> into a <code>HeaderMap</code>.</p> |
| <h4 id="examples-24"><a href="#examples-24">Examples</a></h4> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>std::collections::HashMap; |
| <span class="kw">use </span>std::convert::TryInto; |
| <span class="kw">use </span>http::HeaderMap; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>map = HashMap::new(); |
| map.insert(<span class="string">"X-Custom-Header"</span>.to_string(), <span class="string">"my value"</span>.to_string()); |
| |
| <span class="kw">let </span>headers: HeaderMap = (<span class="kw-2">&</span>map).try_into().expect(<span class="string">"valid headers"</span>); |
| <span class="macro">assert_eq!</span>(headers[<span class="string">"X-Custom-Header"</span>], <span class="string">"my value"</span>);</code></pre></div> |
| </div><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="struct" href="../struct.Error.html" title="struct http::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1852-1860">source</a><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from" class="fnname">try_from</a>(c: &'a <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a><K, V>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><Self, Self::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><section id="impl-Eq-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="../../src/http/header/map.rs.html#1976">source</a><a href="#impl-Eq-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a>> <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T></h3></section></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"><section id="impl-RefUnwindSafe-for-HeaderMap%3CT%3E" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T><span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a>,</span></h3></section><section id="impl-Send-for-HeaderMap%3CT%3E" class="impl has-srclink"><a href="#impl-Send-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T><span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,</span></h3></section><section id="impl-Sync-for-HeaderMap%3CT%3E" class="impl has-srclink"><a href="#impl-Sync-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T><span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,</span></h3></section><section id="impl-Unpin-for-HeaderMap%3CT%3E" class="impl has-srclink"><a href="#impl-Unpin-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T><span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,</span></h3></section><section id="impl-UnwindSafe-for-HeaderMap%3CT%3E" class="impl has-srclink"><a href="#impl-UnwindSafe-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.HeaderMap.html" title="struct http::header::HeaderMap">HeaderMap</a><T><span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a>,</span></h3></section></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Any-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#200">source</a><a href="#impl-Any-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">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="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#201">source</a><a href="#method.type_id" class="anchor"></a><h4 class="code-header">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></h4></section></summary><div class='docblock'>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></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#211">source</a><a href="#impl-Borrow%3CT%3E-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">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="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#213">source</a></span><a href="#method.borrow" class="anchor"></a><h4 class="code-header">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</h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#220">source</a><a href="#impl-BorrowMut%3CT%3E-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">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="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#221">source</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">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</h4></section></summary><div class='docblock'>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></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#733">source</a><a href="#impl-From%3CT%3E-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#736">source</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#717">source</a><a href="#impl-Into%3CU%3E-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T<span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#725">source</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html#tymethod.into" class="fnname">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p> |
| <p>That is, this conversion is whatever the implementation of |
| <code><a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="From">From</a><T> for U</code> chooses to do.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-ToOwned-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#83">source</a><a href="#impl-ToOwned-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T<span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Owned" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Owned" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#associatedtype.Owned" class="associatedtype">Owned</a> = T</h4></section></summary><div class='docblock'>The resulting type after obtaining ownership.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.to_owned" class="method trait-impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#88">source</a><a href="#method.to_owned" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fnname">to_owned</a>(&self) -> T</h4></section></summary><div class='docblock'>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.clone_into" class="method trait-impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#92">source</a><a href="#method.clone_into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/alloc/borrow/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)</h4></section></summary><div class='docblock'>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#775">source</a><a href="#impl-TryFrom%3CU%3E-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T<span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-2" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error-2" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from-1" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#781">source</a></span><a href="#method.try_from-1" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from" class="fnname">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-HeaderMap%3CT%3E" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#760">source</a><a href="#impl-TryInto%3CU%3E-for-HeaderMap%3CT%3E" class="anchor"></a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T<span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#766">source</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into" class="fnname">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="http" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
