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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `header` macro in crate `actix_web`."><meta name="keywords" content="rust, rustlang, rust-lang, header"><title>actix_web::header - Rust</title><link rel="stylesheet" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script></head><body class="rustdoc macro"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><div class="sidebar-elems"><p class='location'><a href='index.html'>actix_web</a></p><script>window.sidebarCurrent = {name: 'header', ty: 'macro', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='in-band'>Macro <a href='index.html'>actix_web</a>::<wbr><a class="macro" href=''>header</a></span><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../src/actix_web/header/common/mod.rs.html#132-328' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class="rust macro">
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<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">header</span> {
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($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">a</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">expr</span>) <span class="op">=></span> (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ty</span>)<span class="kw-2">*</span>) <span class="op">=></span> { ... };
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($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">a</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">expr</span>) <span class="op">=></span> (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ty</span>)<span class="op">+</span>) <span class="op">=></span> { ... };
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($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">a</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">expr</span>) <span class="op">=></span> [<span class="macro-nonterminal">$</span><span class="macro-nonterminal">value</span>:<span class="ident">ty</span>]) <span class="op">=></span> { ... };
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($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">a</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">expr</span>) <span class="op">=></span> {<span class="ident">Any</span> <span class="op">/</span> (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ty</span>)<span class="op">+</span>}) <span class="op">=></span> { ... };
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($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">a</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">expr</span>) <span class="op">=></span> (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ty</span>)<span class="op">*</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tm</span>:<span class="ident">ident</span>{$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tf</span>:<span class="ident">item</span>)<span class="kw-2">*</span>}) <span class="op">=></span> { ... };
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($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">a</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">n</span>:<span class="ident">expr</span>) <span class="op">=></span> (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ty</span>)<span class="op">+</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tm</span>:<span class="ident">ident</span>{$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tf</span>:<span class="ident">item</span>)<span class="kw-2">*</span>}) <span class="op">=></span> { ... };
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($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">a</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">expr</span>) <span class="op">=></span> [<span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ty</span>] <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tm</span>:<span class="ident">ident</span>{$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tf</span>:<span class="ident">item</span>)<span class="kw-2">*</span>}) <span class="op">=></span> { ... };
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($(<span class="attribute">#[<span class="macro-nonterminal">$</span><span class="macro-nonterminal">a</span>:<span class="ident">meta</span>]</span>)<span class="kw-2">*</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">id</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">name</span>:<span class="ident">expr</span>) <span class="op">=></span> {<span class="ident">Any</span> <span class="op">/</span> (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">item</span>:<span class="ident">ty</span>)<span class="op">+</span>} <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tm</span>:<span class="ident">ident</span>{$(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tf</span>:<span class="ident">item</span>)<span class="kw-2">*</span>}) <span class="op">=></span> { ... };
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}</pre>
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