1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Class template attribute_terminal</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.Log v2"> 8<link rel="up" href="../../../expressions.html#header.boost.log.expressions.attr_fwd_hpp" title="Header <boost/log/expressions/attr_fwd.hpp>"> 9<link rel="prev" href="attribute_actor.html" title="Class template attribute_actor"> 10<link rel="next" href="../filter.html" title="Class filter"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td></tr></table> 14<hr> 15<div class="spirit-nav"> 16<a accesskey="p" href="attribute_actor.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../../expressions.html#header.boost.log.expressions.attr_fwd_hpp"><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="../filter.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 17</div> 18<div class="refentry"> 19<a name="boost.log.expressions.attribute_terminal"></a><div class="titlepage"></div> 20<div class="refnamediv"> 21<h2><span class="refentrytitle">Class template attribute_terminal</span></h2> 22<p>boost::log::expressions::attribute_terminal</p> 23</div> 24<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 25<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../../expressions.html#header.boost.log.expressions.attr_fwd_hpp" title="Header <boost/log/expressions/attr_fwd.hpp>">boost/log/expressions/attr_fwd.hpp</a>> 26 27</span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> FallbackPolicyT<span class="special">,</span> <span class="keyword">typename</span> TagT<span class="special">></span> 28<span class="keyword">class</span> <a class="link" href="attribute_terminal.html" title="Class template attribute_terminal">attribute_terminal</a> <span class="special">{</span> 29<span class="keyword">public</span><span class="special">:</span> 30 <span class="comment">// <a class="link" href="attribute_terminal.html#boost.log.expressions.attribute_terminalconstruct-copy-destruct">construct/copy/destruct</a></span> 31 <span class="keyword">explicit</span> <a class="link" href="attribute_terminal.html#idm46079580909776-bb"><span class="identifier">attribute_terminal</span></a><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 32 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">></span> <a class="link" href="attribute_terminal.html#idm46079580908096-bb"><span class="identifier">attribute_terminal</span></a><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">,</span> <span class="identifier">U</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 33 <a class="link" href="attribute_terminal.html#idm46079580905152-bb"><span class="identifier">attribute_terminal</span></a><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span> 34 35 <span class="comment">// <a class="link" href="attribute_terminal.html#idm46079580815120-bb">public member functions</a></span> 36 <span class="identifier">attribute_name</span> <a class="link" href="attribute_terminal.html#idm46079580814560-bb"><span class="identifier">get_name</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 37 <span class="identifier">fallback_policy</span> <span class="keyword">const</span> <span class="special">&</span> <a class="link" href="attribute_terminal.html#idm46079580812448-bb"><span class="identifier">get_fallback_policy</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 38 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> ContextT<span class="special">></span> 39 result<span class="special"><</span> this_type<span class="special">(</span><span class="identifier">ContextT</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> <a class="link" href="attribute_terminal.html#idm46079580810320-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">ContextT</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span><span class="special">;</span> 40 <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> ContextT<span class="special">></span> 41 result<span class="special"><</span> <span class="keyword">const</span> this_type<span class="special">(</span><span class="identifier">ContextT</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> 42 <a class="link" href="attribute_terminal.html#idm46079580913776-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="identifier">ContextT</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> 43<span class="special">}</span><span class="special">;</span></pre></div> 44<div class="refsect1"> 45<a name="idm44984878771632"></a><h2>Description</h2> 46<p>An attribute value extraction terminal </p> 47<div class="refsect2"> 48<a name="idm44984878770992"></a><h3> 49<a name="boost.log.expressions.attribute_terminalconstruct-copy-destruct"></a><code class="computeroutput">attribute_terminal</code> 50 public 51 construct/copy/destruct</h3> 52<div class="orderedlist"><ol class="orderedlist" type="1"> 53<li class="listitem"> 54<pre class="literallayout"><span class="keyword">explicit</span> <a name="idm46079580909776-bb"></a><span class="identifier">attribute_terminal</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&</span> name<span class="special">)</span><span class="special">;</span></pre> 55<p>Initializing constructor </p> 56</li> 57<li class="listitem"> 58<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> U<span class="special">></span> 59 <a name="idm46079580908096-bb"></a><span class="identifier">attribute_terminal</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&</span> name<span class="special">,</span> <span class="identifier">U</span> <span class="keyword">const</span> <span class="special">&</span> arg<span class="special">)</span><span class="special">;</span></pre> 60<p>Initializing constructor </p> 61</li> 62<li class="listitem"><pre class="literallayout"><a name="idm46079580905152-bb"></a><span class="identifier">attribute_terminal</span><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">delete</span><span class="special">;</span></pre></li> 63</ol></div> 64</div> 65<div class="refsect2"> 66<a name="idm44984878748544"></a><h3> 67<a name="idm46079580815120-bb"></a><code class="computeroutput">attribute_terminal</code> public member functions</h3> 68<div class="orderedlist"><ol class="orderedlist" type="1"> 69<li class="listitem"> 70<pre class="literallayout"><span class="identifier">attribute_name</span> <a name="idm46079580814560-bb"></a><span class="identifier">get_name</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> 71<p> 72</p> 73<div class="variablelist"><table border="0" class="variablelist compact"> 74<colgroup> 75<col align="left" valign="top"> 76<col> 77</colgroup> 78<tbody><tr> 79<td><p><span class="term">Returns:</span></p></td> 80<td><p>Attribute value name </p></td> 81</tr></tbody> 82</table></div> 83</li> 84<li class="listitem"> 85<pre class="literallayout"><span class="identifier">fallback_policy</span> <span class="keyword">const</span> <span class="special">&</span> <a name="idm46079580812448-bb"></a><span class="identifier">get_fallback_policy</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> 86<p> 87</p> 88<div class="variablelist"><table border="0" class="variablelist compact"> 89<colgroup> 90<col align="left" valign="top"> 91<col> 92</colgroup> 93<tbody><tr> 94<td><p><span class="term">Returns:</span></p></td> 95<td><p>Fallback policy </p></td> 96</tr></tbody> 97</table></div> 98</li> 99<li class="listitem"> 100<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> ContextT<span class="special">></span> 101 result<span class="special"><</span> this_type<span class="special">(</span><span class="identifier">ContextT</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> 102 <a name="idm46079580810320-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">ContextT</span> <span class="keyword">const</span> <span class="special">&</span> ctx<span class="special">)</span><span class="special">;</span></pre> 103<p>The operator extracts attribute value </p> 104</li> 105<li class="listitem"> 106<pre class="literallayout"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> ContextT<span class="special">></span> 107 result<span class="special"><</span> <span class="keyword">const</span> this_type<span class="special">(</span><span class="identifier">ContextT</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> 108 <a name="idm46079580913776-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">ContextT</span> <span class="keyword">const</span> <span class="special">&</span> ctx<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> 109<p>The operator extracts attribute value </p> 110</li> 111</ol></div> 112</div> 113</div> 114</div> 115<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 116<td align="left"></td> 117<td align="right"><div class="copyright-footer">Copyright © 2007-2019 Andrey Semashev<p> 118 Distributed under the Boost Software License, Version 1.0. (See accompanying 119 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>). 120 </p> 121</div></td> 122</tr></table> 123<hr> 124<div class="spirit-nav"> 125<a accesskey="p" href="attribute_actor.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../../expressions.html#header.boost.log.expressions.attr_fwd_hpp"><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="../filter.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 126</div> 127</body> 128</html> 129
