1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>bind_front_handler</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. Boost.Beast"> 8<link rel="up" href="../ref.html" title="This Page Intentionally Left Blank 2/2"> 9<link rel="prev" href="boost__beast__bind_handler.html" title="bind_handler"> 10<link rel="next" href="boost__beast__buffer_bytes.html" title="buffer_bytes"> 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__bind_handler.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__buffer_bytes.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__bind_front_handler"></a><a class="link" href="boost__beast__bind_front_handler.html" title="bind_front_handler">bind_front_handler</a> 28</h4></div></div></div> 29<p> 30 <a class="indexterm" name="idm46057513396400"></a> 31 </p> 32<p> 33 Bind parameters to a completion handler, creating a new handler. 34 </p> 35<h5> 36<a name="beast.ref.boost__beast__bind_front_handler.h0"></a> 37 <span class="phrase"><a name="beast.ref.boost__beast__bind_front_handler.synopsis"></a></span><a class="link" href="boost__beast__bind_front_handler.html#beast.ref.boost__beast__bind_front_handler.synopsis">Synopsis</a> 38 </h5> 39<p> 40 Defined in header <code class="literal"><<a href="../../../../../../boost/beast/core/bind_handler.hpp" target="_top">boost/beast/core/bind_handler.hpp</a>></code> 41 </p> 42<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span> 43 <span class="keyword">class</span> <a href="../../../../../../doc/html/boost_asio/reference/Handler.html" target="_top"><span class="emphasis"><em>Handler</em></span></a><span class="special">,</span> 44 <span class="keyword">class</span><span class="special">...</span> <span class="identifier">Args</span><span class="special">></span> 45<span class="emphasis"><em>implementation-defined</em></span> 46<span class="identifier">bind_front_handler</span><span class="special">(</span> 47 <span class="identifier">Handler</span><span class="special">&&</span> <span class="identifier">handler</span><span class="special">,</span> 48 <span class="identifier">Args</span><span class="special">&&...</span> <span class="identifier">args</span><span class="special">);</span> 49</pre> 50<h5> 51<a name="beast.ref.boost__beast__bind_front_handler.h1"></a> 52 <span class="phrase"><a name="beast.ref.boost__beast__bind_front_handler.description"></a></span><a class="link" href="boost__beast__bind_front_handler.html#beast.ref.boost__beast__bind_front_handler.description">Description</a> 53 </h5> 54<p> 55 This function creates a new handler which, when invoked, calls the original 56 handler with the list of bound arguments. Any parameters passed in the invocation 57 will be forwarded in the parameter list after the bound arguments. The passed 58 handler and arguments are forwarded into the returned handler, whose associated 59 allocator and associated executor will will be the same as those of the original 60 handler. 61 </p> 62<h5> 63<a name="beast.ref.boost__beast__bind_front_handler.h2"></a> 64 <span class="phrase"><a name="beast.ref.boost__beast__bind_front_handler.example"></a></span><a class="link" href="boost__beast__bind_front_handler.html#beast.ref.boost__beast__bind_front_handler.example">Example</a> 65 </h5> 66<p> 67 This function posts the invocation of the specified completion handler with 68 bound arguments: 69 </p> 70<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">AsyncReadStream</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">ReadHandler</span><span class="special">></span> 71<span class="keyword">void</span> 72<span class="identifier">signal_eof</span> <span class="special">(</span><span class="identifier">AsyncReadStream</span><span class="special">&</span> <span class="identifier">stream</span><span class="special">,</span> <span class="identifier">ReadHandler</span><span class="special">&&</span> <span class="identifier">handler</span><span class="special">)</span> 73<span class="special">{</span> 74 <span class="identifier">net</span><span class="special">::</span><span class="identifier">post</span><span class="special">(</span> 75 <span class="identifier">stream</span><span class="special">.</span><span class="identifier">get_executor</span><span class="special">(),</span> 76 <span class="identifier">bind_front_handler</span> <span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">forward</span><span class="special"><</span><span class="identifier">ReadHandler</span><span class="special">></span> <span class="special">(</span><span class="identifier">handler</span><span class="special">),</span> 77 <span class="identifier">net</span><span class="special">::</span><span class="identifier">error</span><span class="special">::</span><span class="identifier">eof</span><span class="special">,</span> <span class="number">0</span><span class="special">));</span> 78<span class="special">}</span> 79</pre> 80<h5> 81<a name="beast.ref.boost__beast__bind_front_handler.h3"></a> 82 <span class="phrase"><a name="beast.ref.boost__beast__bind_front_handler.parameters"></a></span><a class="link" href="boost__beast__bind_front_handler.html#beast.ref.boost__beast__bind_front_handler.parameters">Parameters</a> 83 </h5> 84<div class="informaltable"><table class="table"> 85<colgroup> 86<col> 87<col> 88</colgroup> 89<thead><tr> 90<th> 91 <p> 92 Name 93 </p> 94 </th> 95<th> 96 <p> 97 Description 98 </p> 99 </th> 100</tr></thead> 101<tbody> 102<tr> 103<td> 104 <p> 105 <code class="computeroutput"><span class="identifier">handler</span></code> 106 </p> 107 </td> 108<td> 109 <p> 110 The handler to wrap. The implementation takes ownership of the 111 handler by performing a decay-copy. 112 </p> 113 </td> 114</tr> 115<tr> 116<td> 117 <p> 118 <code class="computeroutput"><span class="identifier">args</span></code> 119 </p> 120 </td> 121<td> 122 <p> 123 A list of arguments to bind to the handler. The arguments are forwarded 124 into the returned object. 125 </p> 126 </td> 127</tr> 128</tbody> 129</table></div> 130</div> 131<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 132<td align="left"></td> 133<td align="right"><div class="copyright-footer">Copyright © 2016-2019 Vinnie 134 Falco<p> 135 Distributed under the Boost Software License, Version 1.0. (See accompanying 136 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>) 137 </p> 138</div></td> 139</tr></table> 140<hr> 141<div class="spirit-nav"> 142<a accesskey="p" href="boost__beast__bind_handler.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__buffer_bytes.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 143</div> 144</body> 145</html> 146
