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  19 <div class="titlepage"><div><div><h3 class="title">
  20 <a name="attributes"></a>Attributes</h3></div></div></div>
  21 <div class="toc"><dl class="toc">
  22 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.attribute_hpp">Header &lt;boost/log/attributes/attribute.hpp&gt;</a></span></dt>
  23 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.attribute_cast_hpp">Header &lt;boost/log/attributes/attribute_cast.hpp&gt;</a></span></dt>
  24 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.attribute_name_hpp">Header &lt;boost/log/attributes/attribute_name.hpp&gt;</a></span></dt>
  25 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.attribute_set_hpp">Header &lt;boost/log/attributes/attribute_set.hpp&gt;</a></span></dt>
  26 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.attribute_value_hpp">Header &lt;boost/log/attributes/attribute_value.hpp&gt;</a></span></dt>
  27 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.attribute_value_impl_hpp">Header &lt;boost/log/attributes/attribute_value_impl.hpp&gt;</a></span></dt>
  28 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.attribute_value_set_hpp">Header &lt;boost/log/attributes/attribute_value_set.hpp&gt;</a></span></dt>
  29 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.clock_hpp">Header &lt;boost/log/attributes/clock.hpp&gt;</a></span></dt>
  30 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.constant_hpp">Header &lt;boost/log/attributes/constant.hpp&gt;</a></span></dt>
  31 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.counter_hpp">Header &lt;boost/log/attributes/counter.hpp&gt;</a></span></dt>
  32 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.current_process_id_hpp">Header &lt;boost/log/attributes/current_process_id.hpp&gt;</a></span></dt>
  33 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.current_process_name_hpp">Header &lt;boost/log/attributes/current_process_name.hpp&gt;</a></span></dt>
  34 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.current_thread_id_hpp">Header &lt;boost/log/attributes/current_thread_id.hpp&gt;</a></span></dt>
  35 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.fallback_policy_hpp">Header &lt;boost/log/attributes/fallback_policy.hpp&gt;</a></span></dt>
  36 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.fallback_policy_fwd_hpp">Header &lt;boost/log/attributes/fallback_policy_fwd.hpp&gt;</a></span></dt>
  37 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.function_hpp">Header &lt;boost/log/attributes/function.hpp&gt;</a></span></dt>
  38 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.mutable_constant_hpp">Header &lt;boost/log/attributes/mutable_constant.hpp&gt;</a></span></dt>
  39 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.named_scope_hpp">Header &lt;boost/log/attributes/named_scope.hpp&gt;</a></span></dt>
  40 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.scoped_attribute_hpp">Header &lt;boost/log/attributes/scoped_attribute.hpp&gt;</a></span></dt>
  41 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.time_traits_hpp">Header &lt;boost/log/attributes/time_traits.hpp&gt;</a></span></dt>
  42 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.timer_hpp">Header &lt;boost/log/attributes/timer.hpp&gt;</a></span></dt>
  43 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.value_extraction_hpp">Header &lt;boost/log/attributes/value_extraction.hpp&gt;</a></span></dt>
  44 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.value_extraction_fwd_hpp">Header &lt;boost/log/attributes/value_extraction_fwd.hpp&gt;</a></span></dt>
  45 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.value_visitation_hpp">Header &lt;boost/log/attributes/value_visitation.hpp&gt;</a></span></dt>
  46 <dt><span class="section"><a href="attributes.html#header.boost.log.attributes.value_visitation_fwd_hpp">Header &lt;boost/log/attributes/value_visitation_fwd.hpp&gt;</a></span></dt>
  47 </dl></div>
  48 <div class="section">
  49 <div class="titlepage"><div><div><h4 class="title">
  50 <a name="header.boost.log.attributes.attribute_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/attribute.hpp" target="_top">boost/log/attributes/attribute.hpp</a>&gt;</h4></div></div></div>
  51 <p>Andrey Semashev </p>
  52 <p>
  53 </p>
  54 <p>15.04.2007</p>
  55 <p>
  56 The header contains attribute interface definition. </p>
  57 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
  58   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
  59     <span class="keyword">class</span> <a class="link" href="boost/log/attribute.html" title="Class attribute">attribute</a><span class="special">;</span>
  60     <span class="keyword">void</span> <a class="link" href="boost/log/swap_idp61471920.html" title="Function swap"><span class="identifier">swap</span></a><span class="special">(</span><a class="link" href="boost/log/attribute.html" title="Class attribute">attribute</a> <span class="special">&amp;</span><span class="special">,</span> <a class="link" href="boost/log/attribute.html" title="Class attribute">attribute</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  61   <span class="special">}</span>
  62 <span class="special">}</span></pre>
  63 </div>
  64 <div class="section">
  65 <div class="titlepage"><div><div><h4 class="title">
  66 <a name="header.boost.log.attributes.attribute_cast_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/attribute_cast.hpp" target="_top">boost/log/attributes/attribute_cast.hpp</a>&gt;</h4></div></div></div>
  67 <p>Andrey Semashev </p>
  68 <p>
  69 </p>
  70 <p>06.08.2010</p>
  71 <p>
  72 The header contains utilities for casting between attribute factories. </p>
  73 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
  74   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
  75     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="identifier">T</span> <a class="link" href="boost/log/attribute_cast.html" title="Function template attribute_cast"><span class="identifier">attribute_cast</span></a><span class="special">(</span><a class="link" href="boost/log/attribute.html" title="Class attribute">attribute</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  76     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
  77       <span class="keyword">class</span> <a class="link" href="boost/log/attributes/cast_source.html" title="Class cast_source">cast_source</a><span class="special">;</span>
  78     <span class="special">}</span>
  79   <span class="special">}</span>
  80 <span class="special">}</span></pre>
  81 </div>
  82 <div class="section">
  83 <div class="titlepage"><div><div><h4 class="title">
  84 <a name="header.boost.log.attributes.attribute_name_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/attribute_name.hpp" target="_top">boost/log/attributes/attribute_name.hpp</a>&gt;</h4></div></div></div>
  85 <p>Andrey Semashev </p>
  86 <p>
  87 </p>
  88 <p>28.06.2010</p>
  89 <p>
  90 The header contains attribute name interface definition. </p>
  91 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
  92   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
  93     <span class="keyword">class</span> <a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a><span class="special">;</span>
  94     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> TraitsT<span class="special">&gt;</span>
  95       <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">TraitsT</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
  96       <a class="link" href="boost/log/operator_idp61544176.html" title="Function template operator&lt;&lt;"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">TraitsT</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
  97                  <a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  98   <span class="special">}</span>
  99 <span class="special">}</span></pre>
 100 </div>
 101 <div class="section">
 102 <div class="titlepage"><div><div><h4 class="title">
 103 <a name="header.boost.log.attributes.attribute_set_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/attribute_set.hpp" target="_top">boost/log/attributes/attribute_set.hpp</a>&gt;</h4></div></div></div>
 104 <p>Andrey Semashev </p>
 105 <p>
 106 </p>
 107 <p>08.03.2007</p>
 108 <p>
 109 This header contains definition of the attribute set container. </p>
 110 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 111   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 112     <span class="keyword">class</span> <a class="link" href="boost/log/attribute_set.html" title="Class attribute_set">attribute_set</a><span class="special">;</span>
 113     <span class="keyword">void</span> <a class="link" href="boost/log/swap_idp61650720.html" title="Function swap"><span class="identifier">swap</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_set.html" title="Class attribute_set">attribute_set</a> <span class="special">&amp;</span><span class="special">,</span> <a class="link" href="boost/log/attribute_set.html" title="Class attribute_set">attribute_set</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 114   <span class="special">}</span>
 115 <span class="special">}</span></pre>
 116 </div>
 117 <div class="section">
 118 <div class="titlepage"><div><div><h4 class="title">
 119 <a name="header.boost.log.attributes.attribute_value_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/attribute_value.hpp" target="_top">boost/log/attributes/attribute_value.hpp</a>&gt;</h4></div></div></div>
 120 <p>Andrey Semashev </p>
 121 <p>
 122 </p>
 123 <p>21.05.2010</p>
 124 <p>
 125 The header contains <code class="computeroutput">attribute_value</code> class definition. </p>
 126 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 127   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 128     <span class="keyword">class</span> <a class="link" href="boost/log/attribute_value.html" title="Class attribute_value">attribute_value</a><span class="special">;</span>
 129     <span class="keyword">void</span> <a class="link" href="boost/log/swap_idp61743664.html" title="Function swap"><span class="identifier">swap</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_value.html" title="Class attribute_value">attribute_value</a> <span class="special">&amp;</span><span class="special">,</span> <a class="link" href="boost/log/attribute_value.html" title="Class attribute_value">attribute_value</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 130   <span class="special">}</span>
 131 <span class="special">}</span></pre>
 132 </div>
 133 <div class="section">
 134 <div class="titlepage"><div><div><h4 class="title">
 135 <a name="header.boost.log.attributes.attribute_value_impl_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/attribute_value_impl.hpp" target="_top">boost/log/attributes/attribute_value_impl.hpp</a>&gt;</h4></div></div></div>
 136 <p>Andrey Semashev </p>
 137 <p>
 138 </p>
 139 <p>24.06.2007</p>
 140 <p>
 141 The header contains an implementation of a basic attribute value implementation class. </p>
 142 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 143   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 144     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
 145       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">class</span> <a class="link" href="boost/log/attributes/attribute_value_impl.html" title="Class template attribute_value_impl">attribute_value_impl</a><span class="special">;</span>
 146       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a class="link" href="boost/log/attribute_value.html" title="Class attribute_value">attribute_value</a> <a class="link" href="boost/log/attributes/make_attribute_value.html" title="Function template make_attribute_value"><span class="identifier">make_attribute_value</span></a><span class="special">(</span><span class="identifier">T</span> <span class="special">&amp;&amp;</span><span class="special">)</span><span class="special">;</span>
 147     <span class="special">}</span>
 148   <span class="special">}</span>
 149 <span class="special">}</span></pre>
 150 </div>
 151 <div class="section">
 152 <div class="titlepage"><div><div><h4 class="title">
 153 <a name="header.boost.log.attributes.attribute_value_set_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/attribute_value_set.hpp" target="_top">boost/log/attributes/attribute_value_set.hpp</a>&gt;</h4></div></div></div>
 154 <p>Andrey Semashev </p>
 155 <p>
 156 </p>
 157 <p>21.04.2007</p>
 158 <p>
 159 This header file contains definition of attribute value set. The set is constructed from three attribute sets (global, thread-specific and source-specific) and contains attribute values. </p>
 160 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 161   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 162     <span class="keyword">class</span> <a class="link" href="boost/log/attribute_value_set.html" title="Class attribute_value_set">attribute_value_set</a><span class="special">;</span>
 163     <span class="keyword">void</span> <a class="link" href="boost/log/swap_idp61883776.html" title="Function swap"><span class="identifier">swap</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_value_set.html" title="Class attribute_value_set">attribute_value_set</a> <span class="special">&amp;</span><span class="special">,</span> <a class="link" href="boost/log/attribute_value_set.html" title="Class attribute_value_set">attribute_value_set</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 164   <span class="special">}</span>
 165 <span class="special">}</span></pre>
 166 </div>
 167 <div class="section">
 168 <div class="titlepage"><div><div><h4 class="title">
 169 <a name="header.boost.log.attributes.clock_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/clock.hpp" target="_top">boost/log/attributes/clock.hpp</a>&gt;</h4></div></div></div>
 170 <p>Andrey Semashev </p>
 171 <p>
 172 </p>
 173 <p>01.12.2007</p>
 174 <p>
 175 The header contains wall clock attribute implementation and typedefs. </p>
 176 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 177   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 178     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
 179       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> TimeTraitsT<span class="special">&gt;</span> <span class="keyword">class</span> <a class="link" href="boost/log/attributes/basic_clock.html" title="Class template basic_clock">basic_clock</a><span class="special">;</span>
 180
 181       <span class="keyword">typedef</span> <a class="link" href="boost/log/attributes/basic_clock.html" title="Class template basic_clock">basic_clock</a><span class="special">&lt;</span> <a class="link" href="boost/log/attributes/utc_time_traits.html" title="Struct utc_time_traits">utc_time_traits</a> <span class="special">&gt;</span> <a name="boost.log.attributes.utc_clock"></a><span class="identifier">utc_clock</span><span class="special">;</span>  <span class="comment">// Attribute that returns current UTC time. </span>
 182       <span class="keyword">typedef</span> <a class="link" href="boost/log/attributes/basic_clock.html" title="Class template basic_clock">basic_clock</a><span class="special">&lt;</span> <a class="link" href="boost/log/attributes/local_time_traits.html" title="Struct local_time_traits">local_time_traits</a> <span class="special">&gt;</span> <a name="boost.log.attributes.local_clock"></a><span class="identifier">local_clock</span><span class="special">;</span>  <span class="comment">// Attribute that returns current local time. </span>
 183     <span class="special">}</span>
 184   <span class="special">}</span>
 185 <span class="special">}</span></pre>
 186 </div>
 187 <div class="section">
 188 <div class="titlepage"><div><div><h4 class="title">
 189 <a name="header.boost.log.attributes.constant_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/constant.hpp" target="_top">boost/log/attributes/constant.hpp</a>&gt;</h4></div></div></div>
 190 <p>Andrey Semashev </p>
 191 <p>
 192 </p>
 193 <p>15.04.2007</p>
 194 <p>
 195 The header contains implementation of a constant attribute. </p>
 196 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 197   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 198     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
 199       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">class</span> <a class="link" href="boost/log/attributes/constant.html" title="Class template constant">constant</a><span class="special">;</span>
 200       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a class="link" href="boost/log/attributes/make_constant.html" title="Function template make_constant"><span class="identifier">make_constant</span></a><span class="special">(</span><span class="identifier">BOOST_FWD_REF</span><span class="special">(</span><span class="identifier">T</span><span class="special">)</span><span class="special">)</span><span class="special">;</span>
 201     <span class="special">}</span>
 202   <span class="special">}</span>
 203 <span class="special">}</span></pre>
 204 </div>
 205 <div class="section">
 206 <div class="titlepage"><div><div><h4 class="title">
 207 <a name="header.boost.log.attributes.counter_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/counter.hpp" target="_top">boost/log/attributes/counter.hpp</a>&gt;</h4></div></div></div>
 208 <p>Andrey Semashev </p>
 209 <p>
 210 </p>
 211 <p>01.05.2007</p>
 212 <p>
 213 The header contains implementation of the counter attribute. </p>
 214 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 215   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 216     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
 217       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">class</span> <a class="link" href="boost/log/attributes/counter.html" title="Class template counter">counter</a><span class="special">;</span>
 218     <span class="special">}</span>
 219   <span class="special">}</span>
 220 <span class="special">}</span></pre>
 221 </div>
 222 <div class="section">
 223 <div class="titlepage"><div><div><h4 class="title">
 224 <a name="header.boost.log.attributes.current_process_id_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/current_process_id.hpp" target="_top">boost/log/attributes/current_process_id.hpp</a>&gt;</h4></div></div></div>
 225 <p>Andrey Semashev </p>
 226 <p>
 227 </p>
 228 <p>12.09.2009</p>
 229 <p>
 230 The header contains implementation of a current process id attribute </p>
 231 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 232   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 233     <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="boost.log.process_id"></a><span class="identifier">process_id</span><span class="special">;</span>  <span class="comment">// Process identifier type used by the library. </span>
 234     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
 235       <span class="keyword">class</span> <a class="link" href="boost/log/attributes/current_process_id.html" title="Class current_process_id">current_process_id</a><span class="special">;</span>
 236     <span class="special">}</span>
 237   <span class="special">}</span>
 238 <span class="special">}</span></pre>
 239 </div>
 240 <div class="section">
 241 <div class="titlepage"><div><div><h4 class="title">
 242 <a name="header.boost.log.attributes.current_process_name_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/current_process_name.hpp" target="_top">boost/log/attributes/current_process_name.hpp</a>&gt;</h4></div></div></div>
 243 <p>Andrey Semashev </p>
 244 <p>
 245 </p>
 246 <p>29.07.2012</p>
 247 <p>
 248 The header contains implementation of a current process name attribute </p>
 249 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 250   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 251     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
 252       <span class="keyword">class</span> <a class="link" href="boost/log/attributes/current_process_name.html" title="Class current_process_name">current_process_name</a><span class="special">;</span>
 253     <span class="special">}</span>
 254   <span class="special">}</span>
 255 <span class="special">}</span></pre>
 256 </div>
 257 <div class="section">
 258 <div class="titlepage"><div><div><h4 class="title">
 259 <a name="header.boost.log.attributes.current_thread_id_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/current_thread_id.hpp" target="_top">boost/log/attributes/current_thread_id.hpp</a>&gt;</h4></div></div></div>
 260 <p>Andrey Semashev </p>
 261 <p>
 262 </p>
 263 <p>12.09.2009</p>
 264 <p>
 265 The header contains implementation of a current thread id attribute </p>
 266 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 267   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 268     <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="boost.log.thread_id"></a><span class="identifier">thread_id</span><span class="special">;</span>  <span class="comment">// Thread identifier type. </span>
 269     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
 270       <span class="keyword">class</span> <a class="link" href="boost/log/attributes/current_thread_id.html" title="Class current_thread_id">current_thread_id</a><span class="special">;</span>
 271     <span class="special">}</span>
 272   <span class="special">}</span>
 273 <span class="special">}</span></pre>
 274 </div>
 275 <div class="section">
 276 <div class="titlepage"><div><div><h4 class="title">
 277 <a name="header.boost.log.attributes.fallback_policy_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/fallback_policy.hpp" target="_top">boost/log/attributes/fallback_policy.hpp</a>&gt;</h4></div></div></div>
 278 <p>Andrey Semashev </p>
 279 <p>
 280 </p>
 281 <p>18.08.2012</p>
 282 <p>
 283 The header contains definition of fallback policies when attribute value visitation or extraction fails. </p>
 284 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 285   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 286     <span class="keyword">struct</span> <a class="link" href="boost/log/fallback_to_none.html" title="Struct fallback_to_none">fallback_to_none</a><span class="special">;</span>
 287     <span class="keyword">struct</span> <a class="link" href="boost/log/fallback_to_throw.html" title="Struct fallback_to_throw">fallback_to_throw</a><span class="special">;</span>
 288     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DefaultT<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="boost/log/fallback_to_default.html" title="Struct template fallback_to_default">fallback_to_default</a><span class="special">;</span>
 289   <span class="special">}</span>
 290 <span class="special">}</span></pre>
 291 </div>
 292 <div class="section">
 293 <div class="titlepage"><div><div><h4 class="title">
 294 <a name="header.boost.log.attributes.fallback_policy_fwd_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/fallback_policy_fwd.hpp" target="_top">boost/log/attributes/fallback_policy_fwd.hpp</a>&gt;</h4></div></div></div>
 295 <p>Andrey Semashev </p>
 296 <p>
 297 </p>
 298 <p>18.08.2012</p>
 299 <p>
 300 The header contains forward declaration of fallback policies when attribute value visitation or extraction fails. </p>
 301 </div>
 302 <div class="section">
 303 <div class="titlepage"><div><div><h4 class="title">
 304 <a name="header.boost.log.attributes.function_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/function.hpp" target="_top">boost/log/attributes/function.hpp</a>&gt;</h4></div></div></div>
 305 <p>Andrey Semashev </p>
 306 <p>
 307 </p>
 308 <p>24.06.2007</p>
 309 <p>
 310 The header contains implementation of an attribute that calls a third-party function on value acquisition. </p>
 311 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 312   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 313     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
 314       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> R<span class="special">&gt;</span> <span class="keyword">class</span> <a class="link" href="boost/log/attributes/function.html" title="Class template function">function</a><span class="special">;</span>
 315       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
 316         <a class="link" href="boost/log/attributes/function.html" title="Class template function">function</a><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">remove_cv</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">remove_reference</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">(</span><span class="special">)</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> <span class="special">&gt;</span>
 317         <a class="link" href="boost/log/attributes/make_function.html" title="Function template make_function"><span class="identifier">make_function</span></a><span class="special">(</span><span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 318     <span class="special">}</span>
 319   <span class="special">}</span>
 320 <span class="special">}</span></pre>
 321 </div>
 322 <div class="section">
 323 <div class="titlepage"><div><div><h4 class="title">
 324 <a name="header.boost.log.attributes.mutable_constant_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/mutable_constant.hpp" target="_top">boost/log/attributes/mutable_constant.hpp</a>&gt;</h4></div></div></div>
 325 <p>Andrey Semashev </p>
 326 <p>
 327 </p>
 328 <p>06.11.2007</p>
 329 <p>
 330 The header contains implementation of a mutable constant attribute. </p>
 331 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 332   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 333     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
 334       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> MutexT <span class="special">=</span> <span class="keyword">void</span><span class="special">,</span>
 335                <span class="keyword">typename</span> ScopedWriteLockT <span class="special">=</span> <span class="keyword">auto</span><span class="special">,</span>
 336                <span class="keyword">typename</span> ScopedReadLockT <span class="special">=</span> <span class="keyword">auto</span><span class="special">&gt;</span>
 337         <span class="keyword">class</span> <a class="link" href="boost/log/attributes/mutable_constant.html" title="Class template mutable_constant">mutable_constant</a><span class="special">;</span>
 338
 339       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">class</span> <a class="link" href="boost/log/attributes/mutable_consta_idp62118016.html" title="Class template mutable_constant&lt;T, void, void, void&gt;">mutable_constant</a><span class="special">&lt;</span><span class="identifier">T</span><span class="special">,</span> <span class="keyword">void</span><span class="special">,</span> <span class="keyword">void</span><span class="special">,</span> <span class="keyword">void</span><span class="special">&gt;</span><span class="special">;</span>
 340     <span class="special">}</span>
 341   <span class="special">}</span>
 342 <span class="special">}</span></pre>
 343 </div>
 344 <div class="section">
 345 <div class="titlepage"><div><div><h4 class="title">
 346 <a name="header.boost.log.attributes.named_scope_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/named_scope.hpp" target="_top">boost/log/attributes/named_scope.hpp</a>&gt;</h4></div></div></div>
 347 <p>Andrey Semashev </p>
 348 <p>
 349 </p>
 350 <p>24.06.2007</p>
 351 <p>
 352 The header contains implementation of named scope container and an attribute that allows to put the named scope to log. A number of convenience macros are also provided. </p>
 353 <pre class="synopsis">
 354
 355 <a class="link" href="BOOST_LOG_NAMED_SCOPE.html" title="Macro BOOST_LOG_NAMED_SCOPE">BOOST_LOG_NAMED_SCOPE</a>(name)
 356 <a class="link" href="BOOST_LOG_FUNCTION.html" title="Macro BOOST_LOG_FUNCTION">BOOST_LOG_FUNCTION</a>()
 357 <a class="link" href="BOOST_LOG_FUNC.html" title="Macro BOOST_LOG_FUNC">BOOST_LOG_FUNC</a>()</pre>
 358 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 359   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 360     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
 361       <span class="keyword">struct</span> <a class="link" href="boost/log/attributes/named_scope_entry.html" title="Struct named_scope_entry">named_scope_entry</a><span class="special">;</span>
 362
 363       <span class="keyword">class</span> <a class="link" href="boost/log/attributes/named_scope_list.html" title="Class named_scope_list">named_scope_list</a><span class="special">;</span>
 364       <span class="keyword">class</span> <a class="link" href="boost/log/attributes/named_scope.html" title="Class named_scope">named_scope</a><span class="special">;</span>
 365       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> CharT<span class="special">,</span> <span class="keyword">typename</span> TraitsT<span class="special">&gt;</span>
 366         <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">TraitsT</span> <span class="special">&gt;</span> <span class="special">&amp;</span>
 367         <a class="link" href="boost/log/attributes/operator_idp62243360.html" title="Function template operator&lt;&lt;"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span> <span class="identifier">CharT</span><span class="special">,</span> <span class="identifier">TraitsT</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
 368                    <a class="link" href="boost/log/attributes/named_scope_list.html" title="Class named_scope_list">named_scope_list</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 369     <span class="special">}</span>
 370   <span class="special">}</span>
 371 <span class="special">}</span></pre>
 372 </div>
 373 <div class="section">
 374 <div class="titlepage"><div><div><h4 class="title">
 375 <a name="header.boost.log.attributes.scoped_attribute_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/scoped_attribute.hpp" target="_top">boost/log/attributes/scoped_attribute.hpp</a>&gt;</h4></div></div></div>
 376 <p>Andrey Semashev </p>
 377 <p>
 378 </p>
 379 <p>13.05.2007</p>
 380 <p>
 381 The header contains definition of facilities to define scoped attributes. </p>
 382 <pre class="synopsis">
 383
 384 <a class="link" href="BOOST_LOG_SCOPED_LOGGER_ATTR.html" title="Macro BOOST_LOG_SCOPED_LOGGER_ATTR">BOOST_LOG_SCOPED_LOGGER_ATTR</a>(logger, attr_name, attr)
 385 <a class="link" href="BOOST_LOG_SCOPED_LOGGER_TAG.html" title="Macro BOOST_LOG_SCOPED_LOGGER_TAG">BOOST_LOG_SCOPED_LOGGER_TAG</a>(logger, attr_name, attr_value)
 386 <a class="link" href="BOOST_LOG_SCOPED_THREAD_ATTR.html" title="Macro BOOST_LOG_SCOPED_THREAD_ATTR">BOOST_LOG_SCOPED_THREAD_ATTR</a>(attr_name, attr)
 387 <a class="link" href="BOOST_LOG_SCOPED_THREAD_TAG.html" title="Macro BOOST_LOG_SCOPED_THREAD_TAG">BOOST_LOG_SCOPED_THREAD_TAG</a>(attr_name, attr_value)</pre>
 388 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 389   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 390     <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="boost.log.scoped_attribute"></a><span class="identifier">scoped_attribute</span><span class="special">;</span>  <span class="comment">// Scoped attribute guard type. </span>
 391     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> LoggerT<span class="special">&gt;</span>
 392       <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a class="link" href="boost/log/add_scoped_log_idp62258992.html" title="Function template add_scoped_logger_attribute"><span class="identifier">add_scoped_logger_attribute</span></a><span class="special">(</span><span class="identifier">LoggerT</span> <span class="special">&amp;</span><span class="special">,</span>
 393                                               <a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 394                                               <a class="link" href="boost/log/attribute.html" title="Class attribute">attribute</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 395     <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a class="link" href="boost/log/add_scoped_thr_idp62266384.html" title="Function add_scoped_thread_attribute"><span class="identifier">add_scoped_thread_attribute</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 396                                             <a class="link" href="boost/log/attribute.html" title="Class attribute">attribute</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 397   <span class="special">}</span>
 398 <span class="special">}</span></pre>
 399 </div>
 400 <div class="section">
 401 <div class="titlepage"><div><div><h4 class="title">
 402 <a name="header.boost.log.attributes.time_traits_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/time_traits.hpp" target="_top">boost/log/attributes/time_traits.hpp</a>&gt;</h4></div></div></div>
 403 <p>Andrey Semashev </p>
 404 <p>
 405 </p>
 406 <p>01.12.2007</p>
 407 <p>
 408 The header contains implementation of time traits that are used in various parts of the library to acquire current time. </p>
 409 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 410   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 411     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
 412       <span class="keyword">struct</span> <a class="link" href="boost/log/attributes/basic_time_traits.html" title="Struct basic_time_traits">basic_time_traits</a><span class="special">;</span>
 413       <span class="keyword">struct</span> <a class="link" href="boost/log/attributes/utc_time_traits.html" title="Struct utc_time_traits">utc_time_traits</a><span class="special">;</span>
 414       <span class="keyword">struct</span> <a class="link" href="boost/log/attributes/local_time_traits.html" title="Struct local_time_traits">local_time_traits</a><span class="special">;</span>
 415     <span class="special">}</span>
 416   <span class="special">}</span>
 417 <span class="special">}</span></pre>
 418 </div>
 419 <div class="section">
 420 <div class="titlepage"><div><div><h4 class="title">
 421 <a name="header.boost.log.attributes.timer_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/timer.hpp" target="_top">boost/log/attributes/timer.hpp</a>&gt;</h4></div></div></div>
 422 <p>Andrey Semashev </p>
 423 <p>
 424 </p>
 425 <p>02.12.2007</p>
 426 <p>
 427 The header contains implementation of a stop watch attribute. </p>
 428 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 429   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 430     <span class="keyword">namespace</span> <span class="identifier">attributes</span> <span class="special">{</span>
 431       <span class="keyword">class</span> <a class="link" href="boost/log/attributes/timer.html" title="Class timer">timer</a><span class="special">;</span>
 432     <span class="special">}</span>
 433   <span class="special">}</span>
 434 <span class="special">}</span></pre>
 435 </div>
 436 <div class="section">
 437 <div class="titlepage"><div><div><h4 class="title">
 438 <a name="header.boost.log.attributes.value_extraction_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/value_extraction.hpp" target="_top">boost/log/attributes/value_extraction.hpp</a>&gt;</h4></div></div></div>
 439 <p>Andrey Semashev </p>
 440 <p>
 441 </p>
 442 <p>01.03.2008</p>
 443 <p>
 444 The header contains implementation of tools for extracting an attribute value from the view. </p>
 445 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 446   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 447     <span class="keyword">template</span><span class="special">&lt;</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">&gt;</span>
 448       <span class="keyword">class</span> <a class="link" href="boost/log/value_extractor.html" title="Class template value_extractor">value_extractor</a><span class="special">;</span>
 449     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT <span class="special">=</span> <span class="keyword">void</span><span class="special">&gt;</span>
 450       <a class="link" href="boost/log/result_of/extract.html" title="Struct template extract">result_of::extract</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">TagT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 451       <a class="link" href="boost/log/extract_idp62368208.html" title="Function template extract"><span class="identifier">extract</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <a class="link" href="boost/log/attribute_value_set.html" title="Class attribute_value_set">attribute_value_set</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 452     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT <span class="special">=</span> <span class="keyword">void</span><span class="special">&gt;</span>
 453       <a class="link" href="boost/log/result_of/extract.html" title="Struct template extract">result_of::extract</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">TagT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 454       <a class="link" href="boost/log/extract_idp62375696.html" title="Function template extract"><span class="identifier">extract</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">record</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 455     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT <span class="special">=</span> <span class="keyword">void</span><span class="special">&gt;</span>
 456       <a class="link" href="boost/log/result_of/extract.html" title="Struct template extract">result_of::extract</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">TagT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 457       <a class="link" href="boost/log/extract_idp62382912.html" title="Function template extract"><span class="identifier">extract</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">record_view</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 458     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT <span class="special">=</span> <span class="keyword">void</span><span class="special">&gt;</span>
 459       <a class="link" href="boost/log/result_of/extract.html" title="Struct template extract">result_of::extract</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">TagT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> <a class="link" href="boost/log/extract_idp62390128.html" title="Function template extract"><span class="identifier">extract</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_value.html" title="Class attribute_value">attribute_value</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 460     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT <span class="special">=</span> <span class="keyword">void</span><span class="special">&gt;</span>
 461       <a class="link" href="boost/log/result_of/extract_or_throw.html" title="Struct template extract_or_throw">result_of::extract_or_throw</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">TagT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 462       <a class="link" href="boost/log/extract_or_thr_idp62396128.html" title="Function template extract_or_throw"><span class="identifier">extract_or_throw</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <a class="link" href="boost/log/attribute_value_set.html" title="Class attribute_value_set">attribute_value_set</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 463     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT <span class="special">=</span> <span class="keyword">void</span><span class="special">&gt;</span>
 464       <a class="link" href="boost/log/result_of/extract_or_throw.html" title="Struct template extract_or_throw">result_of::extract_or_throw</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">TagT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 465       <a class="link" href="boost/log/extract_or_thr_idp62404352.html" title="Function template extract_or_throw"><span class="identifier">extract_or_throw</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">record</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 466     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT <span class="special">=</span> <span class="keyword">void</span><span class="special">&gt;</span>
 467       <a class="link" href="boost/log/result_of/extract_or_throw.html" title="Struct template extract_or_throw">result_of::extract_or_throw</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">TagT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 468       <a class="link" href="boost/log/extract_or_thr_idp62412304.html" title="Function template extract_or_throw"><span class="identifier">extract_or_throw</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">record_view</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 469     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT <span class="special">=</span> <span class="keyword">void</span><span class="special">&gt;</span>
 470       <a class="link" href="boost/log/result_of/extract_or_throw.html" title="Struct template extract_or_throw">result_of::extract_or_throw</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">TagT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 471       <a class="link" href="boost/log/extract_or_thr_idp62420256.html" title="Function template extract_or_throw"><span class="identifier">extract_or_throw</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_value.html" title="Class attribute_value">attribute_value</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 472     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT <span class="special">=</span> <span class="keyword">void</span><span class="special">,</span> <span class="keyword">typename</span> DefaultT<span class="special">&gt;</span>
 473       <a class="link" href="boost/log/result_of/extract_or_default.html" title="Struct template extract_or_default">result_of::extract_or_default</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">DefaultT</span><span class="special">,</span> <span class="identifier">TagT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 474       <a class="link" href="boost/log/extract_or_def_idp62426992.html" title="Function template extract_or_default"><span class="identifier">extract_or_default</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <a class="link" href="boost/log/attribute_value_set.html" title="Class attribute_value_set">attribute_value_set</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 475                          <span class="identifier">DefaultT</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 476     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT <span class="special">=</span> <span class="keyword">void</span><span class="special">,</span> <span class="keyword">typename</span> DefaultT<span class="special">&gt;</span>
 477       <a class="link" href="boost/log/result_of/extract_or_default.html" title="Struct template extract_or_default">result_of::extract_or_default</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">DefaultT</span><span class="special">,</span> <span class="identifier">TagT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 478       <a class="link" href="boost/log/extract_or_def_idp62436304.html" title="Function template extract_or_default"><span class="identifier">extract_or_default</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">record</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 479                          <span class="identifier">DefaultT</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 480     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT <span class="special">=</span> <span class="keyword">void</span><span class="special">,</span> <span class="keyword">typename</span> DefaultT<span class="special">&gt;</span>
 481       <a class="link" href="boost/log/result_of/extract_or_default.html" title="Struct template extract_or_default">result_of::extract_or_default</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">DefaultT</span><span class="special">,</span> <span class="identifier">TagT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 482       <a class="link" href="boost/log/extract_or_def_idp62445344.html" title="Function template extract_or_default"><span class="identifier">extract_or_default</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">record_view</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 483                          <span class="identifier">DefaultT</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 484     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT <span class="special">=</span> <span class="keyword">void</span><span class="special">,</span> <span class="keyword">typename</span> DefaultT<span class="special">&gt;</span>
 485       <a class="link" href="boost/log/result_of/extract_or_default.html" title="Struct template extract_or_default">result_of::extract_or_default</a><span class="special">&lt;</span> <span class="identifier">T</span><span class="special">,</span> <span class="identifier">DefaultT</span><span class="special">,</span> <span class="identifier">TagT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 486       <a class="link" href="boost/log/extract_or_def_idp62454384.html" title="Function template extract_or_default"><span class="identifier">extract_or_default</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_value.html" title="Class attribute_value">attribute_value</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">DefaultT</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 487     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">&gt;</span>
 488       <a class="link" href="boost/log/result_of/extract.html" title="Struct template extract">result_of::extract</a><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">DescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">DescriptorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 489       <a class="link" href="boost/log/extract_idp62462208.html" title="Function template extract"><span class="identifier">extract</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 490               <a class="link" href="boost/log/attribute_value_set.html" title="Class attribute_value_set">attribute_value_set</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 491     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">&gt;</span>
 492       <a class="link" href="boost/log/result_of/extract.html" title="Struct template extract">result_of::extract</a><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">DescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">DescriptorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 493       <a class="link" href="boost/log/extract_idp62469504.html" title="Function template extract"><span class="identifier">extract</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 494               <span class="identifier">record</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 495     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">&gt;</span>
 496       <a class="link" href="boost/log/result_of/extract.html" title="Struct template extract">result_of::extract</a><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">DescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">DescriptorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 497       <a class="link" href="boost/log/extract_idp62476528.html" title="Function template extract"><span class="identifier">extract</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 498               <span class="identifier">record_view</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 499     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">&gt;</span>
 500       <a class="link" href="boost/log/result_of/extract_or_throw.html" title="Struct template extract_or_throw">result_of::extract_or_throw</a><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">DescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">DescriptorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 501       <a class="link" href="boost/log/extract_or_thr_idp62483552.html" title="Function template extract_or_throw"><span class="identifier">extract_or_throw</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 502                        <a class="link" href="boost/log/attribute_value_set.html" title="Class attribute_value_set">attribute_value_set</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 503     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">&gt;</span>
 504       <a class="link" href="boost/log/result_of/extract_or_throw.html" title="Struct template extract_or_throw">result_of::extract_or_throw</a><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">DescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">DescriptorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 505       <a class="link" href="boost/log/extract_or_thr_idp62491584.html" title="Function template extract_or_throw"><span class="identifier">extract_or_throw</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 506                        <span class="identifier">record</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 507     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">&gt;</span>
 508       <a class="link" href="boost/log/result_of/extract_or_throw.html" title="Struct template extract_or_throw">result_of::extract_or_throw</a><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">DescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">DescriptorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 509       <a class="link" href="boost/log/extract_or_thr_idp62499344.html" title="Function template extract_or_throw"><span class="identifier">extract_or_throw</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 510                        <span class="identifier">record_view</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 511     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">,</span>
 512              <span class="keyword">typename</span> DefaultT<span class="special">&gt;</span>
 513       <a class="link" href="boost/log/result_of/extract_or_default.html" title="Struct template extract_or_default">result_of::extract_or_default</a><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">DescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">DefaultT</span><span class="special">,</span> <span class="identifier">DescriptorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 514       <a class="link" href="boost/log/extract_or_def_idp62507104.html" title="Function template extract_or_default"><span class="identifier">extract_or_default</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 515                          <a class="link" href="boost/log/attribute_value_set.html" title="Class attribute_value_set">attribute_value_set</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">DefaultT</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 516     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">,</span>
 517              <span class="keyword">typename</span> DefaultT<span class="special">&gt;</span>
 518       <a class="link" href="boost/log/result_of/extract_or_default.html" title="Struct template extract_or_default">result_of::extract_or_default</a><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">DescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">DefaultT</span><span class="special">,</span> <span class="identifier">DescriptorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 519       <a class="link" href="boost/log/extract_or_def_idp62516224.html" title="Function template extract_or_default"><span class="identifier">extract_or_default</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 520                          <span class="identifier">record</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">DefaultT</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 521     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">,</span>
 522              <span class="keyword">typename</span> DefaultT<span class="special">&gt;</span>
 523       <a class="link" href="boost/log/result_of/extract_or_default.html" title="Struct template extract_or_default">result_of::extract_or_default</a><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">DescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">DefaultT</span><span class="special">,</span> <span class="identifier">DescriptorT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>
 524       <a class="link" href="boost/log/extract_or_def_idp62525072.html" title="Function template extract_or_default"><span class="identifier">extract_or_default</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 525                          <span class="identifier">record_view</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">DefaultT</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
 526     <span class="keyword">namespace</span> <span class="identifier">result_of</span> <span class="special">{</span>
 527       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> DefaultT<span class="special">,</span> <span class="keyword">typename</span> TagT<span class="special">&gt;</span>
 528         <span class="keyword">struct</span> <a class="link" href="boost/log/result_of/extract_or_default.html" title="Struct template extract_or_default">extract_or_default</a><span class="special">;</span>
 529       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="boost/log/result_of/extract_or_throw.html" title="Struct template extract_or_throw">extract_or_throw</a><span class="special">;</span>
 530       <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> TagT<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="boost/log/result_of/extract.html" title="Struct template extract">extract</a><span class="special">;</span>
 531     <span class="special">}</span>
 532   <span class="special">}</span>
 533 <span class="special">}</span></pre>
 534 </div>
 535 <div class="section">
 536 <div class="titlepage"><div><div><h4 class="title">
 537 <a name="header.boost.log.attributes.value_extraction_fwd_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/value_extraction_fwd.hpp" target="_top">boost/log/attributes/value_extraction_fwd.hpp</a>&gt;</h4></div></div></div>
 538 <p>Andrey Semashev </p>
 539 <p>
 540 </p>
 541 <p>01.03.2008</p>
 542 <p>
 543 The header contains forward declaration of tools for extracting attribute values from the view. </p>
 544 </div>
 545 <div class="section">
 546 <div class="titlepage"><div><div><h4 class="title">
 547 <a name="header.boost.log.attributes.value_visitation_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/value_visitation.hpp" target="_top">boost/log/attributes/value_visitation.hpp</a>&gt;</h4></div></div></div>
 548 <p>Andrey Semashev </p>
 549 <p>
 550 </p>
 551 <p>01.03.2008</p>
 552 <p>
 553 The header contains implementation of convenience tools to apply visitors to an attribute value in the view. </p>
 554 <pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
 555   <span class="keyword">namespace</span> <span class="identifier">log</span> <span class="special">{</span>
 556     <span class="keyword">class</span> <a class="link" href="boost/log/visitation_result.html" title="Class visitation_result">visitation_result</a><span class="special">;</span>
 557     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> FallbackPolicyT<span class="special">&gt;</span> <span class="keyword">class</span> <a class="link" href="boost/log/value_visitor_invoker.html" title="Class template value_visitor_invoker">value_visitor_invoker</a><span class="special">;</span>
 558     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> VisitorT<span class="special">&gt;</span>
 559       <a class="link" href="boost/log/visitation_result.html" title="Class visitation_result">visitation_result</a>
 560       <a class="link" href="boost/log/visit_idp62601712.html" title="Function template visit"><span class="identifier">visit</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <a class="link" href="boost/log/attribute_value_set.html" title="Class attribute_value_set">attribute_value_set</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">VisitorT</span><span class="special">)</span><span class="special">;</span>
 561     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> VisitorT<span class="special">&gt;</span>
 562       <a class="link" href="boost/log/visitation_result.html" title="Class visitation_result">visitation_result</a>
 563       <a class="link" href="boost/log/visit_idp62609424.html" title="Function template visit"><span class="identifier">visit</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">record</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">VisitorT</span><span class="special">)</span><span class="special">;</span>
 564     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> VisitorT<span class="special">&gt;</span>
 565       <a class="link" href="boost/log/visitation_result.html" title="Class visitation_result">visitation_result</a>
 566       <a class="link" href="boost/log/visit_idp62616864.html" title="Function template visit"><span class="identifier">visit</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">record_view</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">VisitorT</span><span class="special">)</span><span class="special">;</span>
 567     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> VisitorT<span class="special">&gt;</span>
 568       <a class="link" href="boost/log/visitation_result.html" title="Class visitation_result">visitation_result</a> <a class="link" href="boost/log/visit_idp62624304.html" title="Function template visit"><span class="identifier">visit</span></a><span class="special">(</span><a class="link" href="boost/log/attribute_value.html" title="Class attribute_value">attribute_value</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">VisitorT</span><span class="special">)</span><span class="special">;</span>
 569     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">,</span>
 570              <span class="keyword">typename</span> VisitorT<span class="special">&gt;</span>
 571       <a class="link" href="boost/log/visitation_result.html" title="Class visitation_result">visitation_result</a>
 572       <a class="link" href="boost/log/visit_idp62630528.html" title="Function template visit"><span class="identifier">visit</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 573             <a class="link" href="boost/log/attribute_value_set.html" title="Class attribute_value_set">attribute_value_set</a> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">VisitorT</span><span class="special">)</span><span class="special">;</span>
 574     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">,</span>
 575              <span class="keyword">typename</span> VisitorT<span class="special">&gt;</span>
 576       <a class="link" href="boost/log/visitation_result.html" title="Class visitation_result">visitation_result</a>
 577       <a class="link" href="boost/log/visit_idp62638864.html" title="Function template visit"><span class="identifier">visit</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 578             <span class="identifier">record</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">VisitorT</span><span class="special">)</span><span class="special">;</span>
 579     <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> DescriptorT<span class="special">,</span> <span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="special">&gt;</span> <span class="keyword">class</span> ActorT<span class="special">,</span>
 580              <span class="keyword">typename</span> VisitorT<span class="special">&gt;</span>
 581       <a class="link" href="boost/log/visitation_result.html" title="Class visitation_result">visitation_result</a>
 582       <a class="link" href="boost/log/visit_idp62646928.html" title="Function template visit"><span class="identifier">visit</span></a><span class="special">(</span><span class="identifier">expressions</span><span class="special">::</span><span class="identifier">attribute_keyword</span><span class="special">&lt;</span> <span class="identifier">DescriptorT</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span>
 583             <span class="identifier">record_view</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">VisitorT</span><span class="special">)</span><span class="special">;</span>
 584   <span class="special">}</span>
 585 <span class="special">}</span></pre>
 586 </div>
 587 <div class="section">
 588 <div class="titlepage"><div><div><h4 class="title">
 589 <a name="header.boost.log.attributes.value_visitation_fwd_hpp"></a>Header &lt;<a href="../../../../boost/log/attributes/value_visitation_fwd.hpp" target="_top">boost/log/attributes/value_visitation_fwd.hpp</a>&gt;</h4></div></div></div>
 590 <p>Andrey Semashev </p>
 591 <p>
 592 </p>
 593 <p>01.03.2008</p>
 594 <p>
 595 The header contains forward declaration of convenience tools to apply visitors to an attribute value in the view. </p>
 596 </div>
 597 </div>
 598 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 599 <td align="left"></td>
 600 <td align="right"><div class="copyright-footer">Copyright &#169; 2007-2016 Andrey Semashev<p>
 601         Distributed under the Boost Software License, Version 1.0. (See accompanying
 602         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>).
 603       </p>
 604 </div></td>
 605 </tr></table>
 606 <hr>
 607 <div class="spirit-nav">
 608 <a accesskey="p" href="boost/log/swap_idp60415520.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="log/reference.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/log/attribute.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a>
 609 </div>
 610 </body>
 611 </html>