1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>http::basic_fields::at (2 of 2 overloads)</title> 5<link rel="stylesheet" href="../../../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../../index.html" title="Chapter 1. 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accesskey="p" href="overload1.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../at.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../operator_lb__rb_.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h6 class="title"> 27<a name="beast.ref.boost__beast__http__basic_fields.at.overload2"></a><a class="link" href="overload2.html" title="http::basic_fields::at (2 of 2 overloads)">http::basic_fields::at 28 (2 of 2 overloads)</a> 29</h6></div></div></div> 30<p> 31 Returns the value for a field, or throws an exception. 32 </p> 33<h7><a name="beast.ref.boost__beast__http__basic_fields.at.overload2.h0"></a> 34 <span class="phrase"><a name="beast.ref.boost__beast__http__basic_fields.at.overload2.synopsis"></a></span><a class="link" href="overload2.html#beast.ref.boost__beast__http__basic_fields.at.overload2.synopsis">Synopsis</a> 35 </h7><pre class="programlisting"><span class="identifier">string_view</span> <span class="keyword">const</span> 36<span class="identifier">at</span><span class="special">(</span> 37 <span class="identifier">string_view</span> <span class="identifier">name</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 38</pre> 39<h7><a name="beast.ref.boost__beast__http__basic_fields.at.overload2.h1"></a> 40 <span class="phrase"><a name="beast.ref.boost__beast__http__basic_fields.at.overload2.description"></a></span><a class="link" href="overload2.html#beast.ref.boost__beast__http__basic_fields.at.overload2.description">Description</a> 41 </h7><p> 42 If more than one field with the specified name exists, the first field 43 defined by insertion order is returned. 44 </p> 45<h7><a name="beast.ref.boost__beast__http__basic_fields.at.overload2.h2"></a> 46 <span class="phrase"><a name="beast.ref.boost__beast__http__basic_fields.at.overload2.parameters"></a></span><a class="link" href="overload2.html#beast.ref.boost__beast__http__basic_fields.at.overload2.parameters">Parameters</a> 47 </h7><div class="informaltable"><table class="table"> 48<colgroup> 49<col> 50<col> 51</colgroup> 52<thead><tr> 53<th> 54 <p> 55 Name 56 </p> 57 </th> 58<th> 59 <p> 60 Description 61 </p> 62 </th> 63</tr></thead> 64<tbody><tr> 65<td> 66 <p> 67 <code class="computeroutput"><span class="identifier">name</span></code> 68 </p> 69 </td> 70<td> 71 <p> 72 The name of the field. 73 </p> 74 </td> 75</tr></tbody> 76</table></div> 77<h7><a name="beast.ref.boost__beast__http__basic_fields.at.overload2.h3"></a> 78 <span class="phrase"><a name="beast.ref.boost__beast__http__basic_fields.at.overload2.return_value"></a></span><a class="link" href="overload2.html#beast.ref.boost__beast__http__basic_fields.at.overload2.return_value">Return 79 Value</a> 80 </h7><p> 81 The field value. 82 </p> 83<h7><a name="beast.ref.boost__beast__http__basic_fields.at.overload2.h4"></a> 84 <span class="phrase"><a name="beast.ref.boost__beast__http__basic_fields.at.overload2.exceptions"></a></span><a class="link" href="overload2.html#beast.ref.boost__beast__http__basic_fields.at.overload2.exceptions">Exceptions</a> 85 </h7><div class="informaltable"><table class="table"> 86<colgroup> 87<col> 88<col> 89</colgroup> 90<thead><tr> 91<th> 92 <p> 93 Type 94 </p> 95 </th> 96<th> 97 <p> 98 Thrown On 99 </p> 100 </th> 101</tr></thead> 102<tbody><tr> 103<td> 104 <p> 105 <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">out_of_range</span></code> 106 </p> 107 </td> 108<td> 109 <p> 110 if the field is not found. 111 </p> 112 </td> 113</tr></tbody> 114</table></div> 115</div> 116<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 117<td align="left"></td> 118<td align="right"><div class="copyright-footer">Copyright © 2016-2019 Vinnie 119 Falco<p> 120 Distributed under the Boost Software License, Version 1.0. (See accompanying 121 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 122 </p> 123</div></td> 124</tr></table> 125<hr> 126<div class="spirit-nav"> 127<a accesskey="p" href="overload1.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../at.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../operator_lb__rb_.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 128</div> 129</body> 130</html> 131
