libs/beast/doc/html/beast/ref/boost__beast__lowest_layer_type.html

   1 <html>
   2 <head>
   3 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
   4 <title>lowest_layer_type</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&#160;1.&#160;Boost.Beast">
   8 <link rel="up" href="../ref.html" title="This Page Intentionally Left Blank 2/2">
   9 <link rel="prev" href="boost__beast__is_sync_write_stream.html" title="is_sync_write_stream">
  10 <link rel="next" href="boost__beast__make_printable.html" title="make_printable">
  11 </head>
  12 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
  13 <table cellpadding="2" width="100%"><tr>
  14 <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td>
  15 <td align="center"><a href="../../../../../../index.html">Home</a></td>
  16 <td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td>
  17 <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
  18 <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
  19 <td align="center"><a href="../../../../../../more/index.htm">More</a></td>
  20 </tr></table>
  21 <hr>
  22 <div class="spirit-nav">
  23 <a accesskey="p" href="boost__beast__is_sync_write_stream.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../ref.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="boost__beast__make_printable.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
  24 </div>
  25 <div class="section">
  26 <div class="titlepage"><div><div><h4 class="title">
  27 <a name="beast.ref.boost__beast__lowest_layer_type"></a><a class="link" href="boost__beast__lowest_layer_type.html" title="lowest_layer_type">lowest_layer_type</a>
  28 </h4></div></div></div>
  29 <p>
  30         <a class="indexterm" name="idm45873487368976"></a>
  31 A trait to determine the lowest layer type of a stack of
  32         stream layers.
  33       </p>
  34 <h5>
  35 <a name="beast.ref.boost__beast__lowest_layer_type.h0"></a>
  36         <span class="phrase"><a name="beast.ref.boost__beast__lowest_layer_type.synopsis"></a></span><a class="link" href="boost__beast__lowest_layer_type.html#beast.ref.boost__beast__lowest_layer_type.synopsis">Synopsis</a>
  37       </h5>
  38 <p>
  39         Defined in header <code class="literal">&lt;<a href="../../../../../../boost/beast/core/stream_traits.hpp" target="_top">boost/beast/core/stream_traits.hpp</a>&gt;</code>
  40       </p>
  41 <pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span>
  42     <span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span>
  43 <span class="keyword">using</span> <span class="identifier">lowest_layer_type</span> <span class="special">=</span> <span class="emphasis"><em>see-below</em></span><span class="special">;</span>
  44 </pre>
  45 <h5>
  46 <a name="beast.ref.boost__beast__lowest_layer_type.h1"></a>
  47         <span class="phrase"><a name="beast.ref.boost__beast__lowest_layer_type.description"></a></span><a class="link" href="boost__beast__lowest_layer_type.html#beast.ref.boost__beast__lowest_layer_type.description">Description</a>
  48       </h5>
  49 <p>
  50         If <code class="computeroutput"><span class="identifier">t</span><span class="special">.</span><span class="identifier">next_layer</span><span class="special">()</span></code>
  51         is well-defined for an object <code class="computeroutput"><span class="identifier">t</span></code>
  52         of type <code class="computeroutput"><span class="identifier">T</span></code>, then <code class="computeroutput"><span class="identifier">lowest_layer_type</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code> will
  53         be an alias for <code class="computeroutput"><span class="identifier">lowest_layer_type</span><span class="special">&lt;</span><span class="keyword">decltype</span><span class="special">(</span><span class="identifier">t</span><span class="special">.</span><span class="identifier">next_layer</span><span class="special">())&gt;</span></code>,
  54         otherwise it will be the type <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">remove_reference</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code>.
  55       </p>
  56 <h5>
  57 <a name="beast.ref.boost__beast__lowest_layer_type.h2"></a>
  58         <span class="phrase"><a name="beast.ref.boost__beast__lowest_layer_type.parameters"></a></span><a class="link" href="boost__beast__lowest_layer_type.html#beast.ref.boost__beast__lowest_layer_type.parameters">Parameters</a>
  59       </h5>
  60 <div class="informaltable"><table class="table">
  61 <colgroup>
  62 <col>
  63 <col>
  64 </colgroup>
  65 <thead><tr>
  66 <th>
  67                 <p>
  68                   Name
  69                 </p>
  70               </th>
  71 <th>
  72                 <p>
  73                   Description
  74                 </p>
  75               </th>
  76 </tr></thead>
  77 <tbody><tr>
  78 <td>
  79                 <p>
  80                   <code class="computeroutput"><span class="identifier">T</span></code>
  81                 </p>
  82               </td>
  83 <td>
  84                 <p>
  85                   The type to determine the lowest layer type of.
  86                 </p>
  87               </td>
  88 </tr></tbody>
  89 </table></div>
  90 <h5>
  91 <a name="beast.ref.boost__beast__lowest_layer_type.h3"></a>
  92         <span class="phrase"><a name="beast.ref.boost__beast__lowest_layer_type.return_value"></a></span><a class="link" href="boost__beast__lowest_layer_type.html#beast.ref.boost__beast__lowest_layer_type.return_value">Return Value</a>
  93       </h5>
  94 <p>
  95         The type of the lowest layer.
  96       </p>
  97 <p>
  98         Convenience header <code class="literal">&lt;<a href="../../../../../../boost/beast/core.hpp" target="_top">boost/beast/core.hpp</a>&gt;</code>
  99       </p>
 100 </div>
 101 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 102 <td align="left"></td>
 103 <td align="right"><div class="copyright-footer">Copyright &#169; 2016-2019 Vinnie
 104       Falco<p>
 105         Distributed under the Boost Software License, Version 1.0. (See accompanying
 106         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>)
 107       </p>
 108 </div></td>
 109 </tr></table>
 110 <hr>
 111 <div class="spirit-nav">
 112 <a accesskey="p" href="boost__beast__is_sync_write_stream.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../ref.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="boost__beast__make_printable.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a>
 113 </div>
 114 </body>
 115 </html>