<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="API documentation for the Rust `HeaderMap` struct in crate `actix_web`."><metaname="keywords"content="rust, rustlang, rust-lang, HeaderMap"><title>actix_web::http::header::HeaderMap - Rust</title><linkrel="stylesheet"type="text/css"href="../../../normalize.css"><linkrel="stylesheet"type="text/css"href="../../../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../../../dark.css"><linkrel="stylesheet"type="text/css"href="../../../light.css"id="themeStyle"><scriptsrc="../../../storage.js"></script></head><bodyclass="rustdoc struct"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="sidebar"><divclass="sidebar-menu">☰</div><pclass='location'>Struct HeaderMap</p><divclass="sidebar-elems"><divclass="block items"><aclass="sidebar-title"href="#methods">Methods</a><divclass="sidebar-links"><ahref="#method.new">new</a><ahref="#method.with_capacity">with_capacity</a><ahref="#method.len">len</a><ahref="#method.keys_len">keys_len</a><ahref="#method.is_empty">is_empty</a><ahref="#method.clear">clear</a><ahref="#method.capacity">capacity</a><ahref="#method.reserve">reserve</a><ahref="#method.get">get</a><ahref="#method.get_mut">get_mut</a><ahref="#method.get_all">get_all</a><ahref="#method.contains_key">contains_key</a><ahref="#method.iter">iter</a><ahref="#method.iter_mut">iter_mut</a><ahref="#method.keys">keys</a><ahref="#method.values">values</a><ahref="#method.values_mut">values_mut</a><ahref="#method.drain">drain</a><ahref="#method.entry">entry</a><ahref="#method.insert">insert</a><ahref="#method.append">append</a><ahref="#method.remove">remove</a></div><aclass="sidebar-title"href="#implementations">Trait Implementations</a><divclass="sidebar-links"><ahref="#impl-Default">Default</a><ahref="#impl-Eq">Eq</a><ahref="#impl-PartialEq%3CHeaderMap%3CT%3E%3E">PartialEq<HeaderMap<T>></a><ahref="#impl-Extend%3C(Option%3CHeaderName%3E%2C%20T)%3E">Extend<(Option<HeaderName>, T)></a><ahref="#impl-Extend%3C(HeaderName%2C%20T)%3E">Extend<(HeaderName, T)></a><ahref="#impl-Index%3CK%3E">Index<K></a><ahref="#impl-IntoIterator">IntoIterator</a><ahref="#impl-Clone">Clone</a><ahref="#impl-Debug">Debug</a><ahref="#impl-FromIterator%3C(HeaderName%2C%20T)%3E">FromIterator<(HeaderName, T)></a></div><aclass="sidebar-title"href="#synthetic-implementations">Auto Trait Implementations</a><divclass="sidebar-links"><ahref="#impl-Send">Send</a><ahref="#impl-Sync">Sync</a></div></div><pclass='location'><ahref='../../index.html'>actix_web</a>::<wbr><ahref='../index.html'>http</a>::<wbr><ahref='index.html'>header</a></p><script>window.sidebarCurrent={name:'HeaderMap',ty:'struct',relpath:''};</script><scriptdefersrc="sidebar-items.js"></script></div></nav><divclass="theme-picker"><buttonid="theme-picker"aria-label="Pick another theme!"><imgsrc="../../../brush.svg"width="18"alt="Pick another theme!"></button><divid="theme-choices"></div></div><scriptsrc="../../../theme.js"></script><navclass="sub"><formclass="search-form js-only"><divclass="search-container"><inputclass="search-input"name="search"autocomplete="off"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><aid="settings-menu"href="../../../settings.html"><imgsrc="../../../wheel.svg"width="18"alt="Change settings"></a></div></form></nav><sectionid="main"class="content"><h1class='fqn'><spanclass='in-band'>Struct <ahref='../../index.html'>actix_web</a>::<wbr><ahref='../index.html'>http</a>::<wbr><ahref='index.html'>header</a>::<wbr><aclass="struct"href=''>HeaderMap</a></span><spanclass='out-of-band'><spanid='render-detail'><aid="toggle-all-docs"href="javascript:void(0)"title="collapse all docs">[<sp
</div><h4id='method.len'class="method"><spanid='len.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>pub fn <ahref='#method.len'class='fnname'>len</a>(&self) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#498-500'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Returns the number of headers stored in the map.</p>
</div><h4id='method.keys_len'class="method"><spanid='keys_len.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>pub fn <ahref='#method.keys_len'class='fnname'>keys_len</a>(&self) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#525-527'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Returns the number of keys stored in the map.</p>
</div><h4id='method.is_empty'class="method"><spanid='is_empty.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>pub fn <ahref='#method.is_empty'class='fnname'>is_empty</a>(&self) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#544-546'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Returns true if the map contains no elements.</p>
</div><h4id='method.capacity'class="method"><spanid='capacity.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>pub fn <ahref='#method.capacity'class='fnname'>capacity</a>(&self) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#590-592'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Returns the number of headers the map can hold without reallocating.</p>
</div><h4id='method.reserve'class="method"><spanid='reserve.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>pub fn <ahref='#method.reserve'class='fnname'>reserve</a>(&mut self, additional: <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>)</code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#616-634'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Reserves capacity for at least <code>additional</code> more headers to be inserted
</div><h4id='method.get'class="method"><spanid='get.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>pub fn <ahref='#method.get'class='fnname'>get</a><K>(&self, key: K) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T><spanclass="where fmt-newline">where<br> K: <aclass="trait"href="../../../actix_web/http/header/trait.AsHeaderName.html"title="trait actix_web::http::header::AsHeaderName">AsHeaderName</a>, </span></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#657-667'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Returns a reference to the value associated with the key.</p>
</div><h4id='method.get_mut'class="method"><spanid='get_mut.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>pub fn <ahref='#method.get_mut'class='fnname'>get_mut</a><K>(&mut self, key: K) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T><spanclass="where fmt-newline">where<br> K: <aclass="trait"href="../../../actix_web/http/header/trait.AsHeaderName.html"title="trait actix_web::http::header::AsHeaderName">AsHeaderName</a>, </span></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#686-696'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Returns a mutable reference to the value associated with the key.</p>
</div><h4id='method.get_all'class="method"><spanid='get_all.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>pub fn <ahref='#method.get_all'class='fnname'>get_all</a><K>(&self, key: K) -><aclass="struct"href="../../../actix_web/http/header/struct.GetAll.html"title="struct actix_web::http::header::GetAll">GetAll</a><T><spanclass="where fmt-newline">where<br> K: <aclass="trait"href="../../../actix_web/http/header/trait.AsHeaderName.html"title="trait actix_web::http::header::AsHeaderName">AsHeaderName</a>, </span></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#723-730'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Returns a view of all values associated with a key.</p>
</div><h4id='method.contains_key'class="method"><spanid='contains_key.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>pub fn <ahref='#method.contains_key'class='fnname'>contains_key</a><K>(&self, key: K) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a><spanclass="where fmt-newline">where<br> K: <aclass="trait"href="../../../actix_web/http/header/trait.AsHeaderName.html"title="trait actix_web::http::header::AsHeaderName">AsHeaderName</a>, </span></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#745-749'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Returns true if the map contains a value for the specified key.</p>
</div><h4id='method.remove'class="method"><spanid='remove.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>pub fn <ahref='#method.remove'class='fnname'>remove</a><K>(&mut self, key: K) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><T><spanclass="where fmt-newline">where<br> K: <aclass="trait"href="../../../actix_web/http/header/trait.AsHeaderName.html"title="trait actix_web::http::header::AsHeaderName">AsHeaderName</a>, </span></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1278-1293'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Removes a key from the map, returning the value associated with the key.</p>
<divid='implementations-list'><h3id='impl-Default'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html"title="trait core::default::Default">Default</a> for <aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T></code><ahref='#impl-Default'class='anchor'></a></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1842-1846'title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><divclass='impl-items'><h4id='method.default'class="method"><spanid='default.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>fn <ahref='https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default'class='fnname'>default</a>() -><aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1843-1845'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Returns the "default value" for a type. <ahref="https://doc.rust-lang.org/nightly/core/default/trait.Default.html#tymethod.default">Read more</a></p>
</div></div><h3id='impl-Eq'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/cmp/trait.Eq.html"title="trait core::cmp::Eq">Eq</a> for <aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T><spanclass="where fmt-newline">where<br> T: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/cmp/trait.Eq.html"title="trait core::cmp::Eq">Eq</a>, </span></code><ahref='#impl-Eq'class='anchor'></a></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1834'title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><divclass='impl-items'></div><h3id='impl-PartialEq%3CHeaderMap%3CT%3E%3E'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html"title="trait core::cmp::PartialEq">PartialEq</a><<aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T>> for <aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T><spanclass="where fmt-newline">where<br> T: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html"title="trait core::cmp::PartialEq">PartialEq</a><T>, </span></code><ahref='#impl-PartialEq%3CHeaderMap%3CT%3E%3E'class='anchor'></a></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1822-1832'title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><divclass='impl-items'><h4id='method.eq'class="method"><spanid='eq.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>fn <ahref='https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#tymethod.eq'class='fnname'>eq</a>(&self, other: &<aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T>) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1823-1831'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>This method tests for <code>self</code> and <code>other</code> values to be equal, and is used by <code>==</code>. <ahref="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#tymethod.eq">Read more</a></p>
</div>fn <ahref='https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#method.ne'class='fnname'>ne</a>(&self, other: <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>Rhs) -><aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><divclass='since'title='Stable since Rust version 1.0.0'>1.0.0</div><aclass='srclink'href='https://doc.rust-lang.org/nightly/src/core/cmp.rs.html#126'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>This method tests for <code>!=</code>.</p>
</div></div><h3id='impl-Extend%3C(Option%3CHeaderName%3E%2C%20T)%3E'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.Extend.html"title="trait core::iter::traits::Extend">Extend</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="struct"href="../../../actix_web/http/header/struct.HeaderName.html"title="struct actix_web::http::header::HeaderName">HeaderName</a>>, T<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>> for <aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T></code><ahref='#impl-Extend%3C(Option%3CHeaderName%3E%2C%20T)%3E'class='anchor'></a></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1715-1797'title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><divclass='impl-items'><h4id='method.extend'class="method"><spanid='extend.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>fn <ahref='https://doc.rust-lang.org/nightly/core/iter/traits/trait.Extend.html#tymethod.extend'class='fnname'>extend</a><I>(&mut self, iter: I) <spanclass="where fmt-newline">where<br> I: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html"title="trait core::iter::traits::IntoIterator">IntoIterator</a><Item = <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="struct"href="../../../actix_web/http/header/struct.HeaderName.html"title="struct actix_web::http::header::HeaderName">HeaderName</a>>, T<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>>, </span></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1752-1796'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='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
</div><h4id='method.into_iter-1'class="method"><divclass="important-traits"><divclass='tooltip'>ⓘ<spanclass='tooltiptext'>Important traits for <aclass="struct"href="../../../actix_web/http/header/struct.IntoIter.html"title="struct actix_web::http::header::IntoIter">IntoIter</a><T></span></div><divclass="content hidden"><h3class="important">Important traits for <aclass="struct"href="../../../actix_web/http/header/struct.IntoIter.html"title="struct actix_web::http::header::IntoIter">IntoIter</a><T></h3><codeclass="content"><spanclass="where fmt-newline">impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html"title="trait core::iter::iterator::Iterator">Iterator</a> for <aclass="struct"href="../../../actix_web/http/header/struct.IntoIter.html"title="struct actix_web::http::header::IntoIter">IntoIter</a><T></span><spanclass="where fmt-newline"> type <ahref='https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item'class="type">Item</a> = <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><aclass="enum"href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html"title="enum core::option::Option">Option</a><<aclass="struct"href="../../../actix_web/http/header/struct.HeaderName.html"title="struct actix_web::http::header::HeaderName">HeaderName</a>>, T<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>;</span></code></div></div><spanid='into_iter.v-1'class='invisible'><tableclass='table-display'><tbody><tr><td><code>fn <ahref='https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html#tymethod.into_iter'class='fnname'>into_iter</a>(self) -><aclass="struct"href="../../../actix_web/http/header/struct.IntoIter.html"title="struct actix_web::http::header::IntoIter">IntoIter</a><T></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1695-1701'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Creates a consuming iterator, that is, one that moves keys and values
</div><h4id='method.into_iter-2'class="method"><spanid='into_iter.v-2'class='invisible'><tableclass='table-display'><tbody><tr><td><code>fn <ahref='https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html#tymethod.into_iter'class='fnname'>into_iter</a>(self) -> IterMut<'a, T></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1637-1639'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Creates an iterator from a value. <ahref="https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html#tymethod.into_iter">Read more</a></p>
</div></div><h3id='impl-Clone'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html"title="trait core::clone::Clone">Clone</a> for <aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T><spanclass="where fmt-newline">where<br> T: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html"title="trait core::clone::Clone">Clone</a>, </span></code><ahref='#impl-Clone'class='anchor'></a></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#38'title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><divclass='impl-items'><h4id='method.clone'class="method"><spanid='clone.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>fn <ahref='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone'class='fnname'>clone</a>(&self) -><aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#38'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Returns a copy of the value. <ahref="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
</div></div><h3id='impl-Debug'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html"title="trait core::fmt::Debug">Debug</a> for <aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T><spanclass="where fmt-newline">where<br> T: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html"title="trait core::fmt::Debug">Debug</a>, </span></code><ahref='#impl-Debug'class='anchor'></a></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1836-1840'title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><divclass='impl-items'><h4id='method.fmt'class="method"><spanid='fmt.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>fn <ahref='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt'class='fnname'>fmt</a>(&self, f: &mut <aclass="struct"href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html"title="struct core::fmt::Formatter">Formatter</a>) -><aclass="enum"href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html"title="enum core::result::Result">Result</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, <aclass="struct"href="https://doc.rust-lang.org/nightly/core/fmt/struct.Error.html"title="struct core::fmt::Error">Error</a>></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1837-1839'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Formats the value using the given formatter. <ahref="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></div><h3id='impl-FromIterator%3C(HeaderName%2C%20T)%3E'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.FromIterator.html"title="trait core::iter::traits::FromIterator">FromIterator</a><<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><aclass="struct"href="../../../actix_web/http/header/struct.HeaderName.html"title="struct actix_web::http::header::HeaderName">HeaderName</a>, T<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>> for <aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T></code><ahref='#impl-FromIterator%3C(HeaderName%2C%20T)%3E'class='anchor'></a></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1704-1713'title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><divclass='impl-items'><h4id='method.from_iter'class="method"><spanid='from_iter.v'class='invisible'><tableclass='table-display'><tbody><tr><td><code>fn <ahref='https://doc.rust-lang.org/nightly/core/iter/traits/trait.FromIterator.html#tymethod.from_iter'class='fnname'>from_iter</a><I>(iter: I) -><aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T><spanclass="where fmt-newline">where<br> I: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html"title="trait core::iter::traits::IntoIterator">IntoIterator</a><Item = <aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a><aclass="struct"href="../../../actix_web/http/header/struct.HeaderName.html"title="struct actix_web::http::header::HeaderName">HeaderName</a>, T<aclass="primitive"href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>>, </span></code></span></td><td><spanclass='out-of-band'><divclass='ghost'></div><aclass='srclink'href='https://docs.rs/http/0.1.8/src/http/header/map.rs.html#1706-1712'title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><divclass='docblock'><p>Creates a value from an iterator. <ahref="https://doc.rust-lang.org/nightly/core/iter/traits/trait.FromIterator.html#tymethod.from_iter">Read more</a></p>
Auto Trait Implementations<ahref='#synthetic-implementations'class='anchor'></a>
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<h3id='impl-Send'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html"title="trait core::marker::Send">Send</a> for <aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T><spanclass="where fmt-newline">where<br> T: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html"title="trait core::marker::Send">Send</a>, </span></code><ahref='#impl-Send'class='anchor'></a></span></td><td><spanclass='out-of-band'></span></td></tr></tbody></table></h3><divclass='impl-items'></div><h3id='impl-Sync'class='impl'><spanclass='in-band'><tableclass='table-display'><tbody><tr><td><code>impl<T><aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html"title="trait core::marker::Sync">Sync</a> for <aclass="struct"href="../../../actix_web/http/header/struct.HeaderMap.html"title="struct actix_web::http::header::HeaderMap">HeaderMap</a><T><spanclass="where fmt-newline">where<br> T: <aclass="trait"href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html"title="trait core::marker::Sync">Sync</a>, </span></code><ahref='#impl-Sync'class='anchor'></a></span></td><td><spanclass='out-of-band'></span></td></tr></tbody></table></h3><divclass='impl-items'></div></div></section><sectionid="search"class="content hidden"></section><sectionclass="footer"></section><asideid="help"class="hidden"><div><h1class="hidden">Help</h1><divclass="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><divclass="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g. <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath="../../../";window.currentCrate="actix_web";</script><scriptsrc="../../../aliases.js"></script><scriptsrc="../../../main.js"></script><scriptdefersrc="../../../search-index.js"></script></body></html>
