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  19 <a name="boost.log.expressions.channel_severity_filter"></a><div class="titlepage"></div>
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  21 <h2><span class="refentrytitle">Function channel_severity_filter</span></h2>
  22 <p>boost::log::expressions::channel_severity_filter</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: &lt;<a class="link" href="../../../expressions.html#header.boost.log.expressions.predicates.channel_severity_filter_hpp" title="Header &lt;boost/log/expressions/predicates/channel_severity_filter.hpp&gt;">boost/log/expressions/predicates/channel_severity_filter.hpp</a>&gt;
  26
  27 </span>
  28 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> SeverityT<span class="special">&gt;</span>
  29   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">SeverityT</span> <span class="special">&gt;</span>
  30   <span class="identifier">channel_severity_filter</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_name<span class="special">,</span>
  31                           <span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">)</span><span class="special">;</span>
  32 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> ChannelDescriptorT<span class="special">,</span>
  33          <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>
  34   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">ChannelDescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">greater_equal</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
  35   <span class="identifier">channel_severity_filter</span><span class="special">(</span><a class="link" href="attribute_keyword.html" title="Struct template attribute_keyword">attribute_keyword</a><span class="special">&lt;</span> <span class="identifier">ChannelDescriptorT</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> channel_keyword<span class="special">,</span>
  36                           <span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">)</span><span class="special">;</span>
  37 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> SeverityDescriptorT<span class="special">,</span>
  38          <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>
  39   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">SeverityDescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">greater_equal</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
  40   <span class="identifier">channel_severity_filter</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_name<span class="special">,</span>
  41                           <a class="link" href="attribute_keyword.html" title="Struct template attribute_keyword">attribute_keyword</a><span class="special">&lt;</span> <span class="identifier">SeverityDescriptorT</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> severity_keyword<span class="special">)</span><span class="special">;</span>
  42 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelDescriptorT<span class="special">,</span> <span class="keyword">typename</span> SeverityDescriptorT<span class="special">,</span>
  43          <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>
  44   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">ChannelDescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">SeverityDescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">greater_equal</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
  45   <span class="identifier">channel_severity_filter</span><span class="special">(</span><a class="link" href="attribute_keyword.html" title="Struct template attribute_keyword">attribute_keyword</a><span class="special">&lt;</span> <span class="identifier">ChannelDescriptorT</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> channel_keyword<span class="special">,</span>
  46                           <a class="link" href="attribute_keyword.html" title="Struct template attribute_keyword">attribute_keyword</a><span class="special">&lt;</span> <span class="identifier">SeverityDescriptorT</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> severity_keyword<span class="special">)</span><span class="special">;</span>
  47 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> ChannelFallbackT<span class="special">,</span>
  48          <span class="keyword">typename</span> ChannelTagT<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>
  49   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">ChannelFallbackT</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">greater_equal</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
  50   <span class="identifier">channel_severity_filter</span><span class="special">(</span><a class="link" href="attribute_actor.html" title="Class template attribute_actor">attribute_actor</a><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">ChannelFallbackT</span><span class="special">,</span> <span class="identifier">ChannelTagT</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> channel_placeholder<span class="special">,</span>
  51                           <span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">)</span><span class="special">;</span>
  52 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> SeverityFallbackT<span class="special">,</span>
  53          <span class="keyword">typename</span> SeverityTagT<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>
  54   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">SeverityFallbackT</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">greater_equal</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
  55   <span class="identifier">channel_severity_filter</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_name<span class="special">,</span>
  56                           <a class="link" href="attribute_actor.html" title="Class template attribute_actor">attribute_actor</a><span class="special">&lt;</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">SeverityFallbackT</span><span class="special">,</span> <span class="identifier">SeverityTagT</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> severity_placeholder<span class="special">)</span><span class="special">;</span>
  57 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> ChannelFallbackT<span class="special">,</span> <span class="keyword">typename</span> ChannelTagT<span class="special">,</span>
  58          <span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> SeverityFallbackT<span class="special">,</span>
  59          <span class="keyword">typename</span> SeverityTagT<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>
  60   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">ChannelFallbackT</span><span class="special">,</span> <span class="identifier">SeverityFallbackT</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">greater_equal</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
  61   <span class="identifier">channel_severity_filter</span><span class="special">(</span><a class="link" href="attribute_actor.html" title="Class template attribute_actor">attribute_actor</a><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">ChannelFallbackT</span><span class="special">,</span> <span class="identifier">ChannelTagT</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> channel_placeholder<span class="special">,</span>
  62                           <a class="link" href="attribute_actor.html" title="Class template attribute_actor">attribute_actor</a><span class="special">&lt;</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">SeverityFallbackT</span><span class="special">,</span> <span class="identifier">SeverityTagT</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> severity_placeholder<span class="special">)</span><span class="special">;</span>
  63 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> SeverityCompareT<span class="special">&gt;</span>
  64   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span> <span class="special">&gt;</span>
  65   <span class="identifier">channel_severity_filter</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_name<span class="special">,</span>
  66                           <span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">,</span>
  67                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">)</span><span class="special">;</span>
  68 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> ChannelDescriptorT<span class="special">,</span>
  69          <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> <span class="keyword">typename</span> SeverityCompareT<span class="special">&gt;</span>
  70   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">ChannelDescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
  71   <span class="identifier">channel_severity_filter</span><span class="special">(</span><a class="link" href="attribute_keyword.html" title="Struct template attribute_keyword">attribute_keyword</a><span class="special">&lt;</span> <span class="identifier">ChannelDescriptorT</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> channel_keyword<span class="special">,</span>
  72                           <span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">,</span>
  73                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">)</span><span class="special">;</span>
  74 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> SeverityDescriptorT<span class="special">,</span>
  75          <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> <span class="keyword">typename</span> SeverityCompareT<span class="special">&gt;</span>
  76   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">SeverityDescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
  77   <span class="identifier">channel_severity_filter</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_name<span class="special">,</span>
  78                           <a class="link" href="attribute_keyword.html" title="Struct template attribute_keyword">attribute_keyword</a><span class="special">&lt;</span> <span class="identifier">SeverityDescriptorT</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> severity_keyword<span class="special">,</span>
  79                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">)</span><span class="special">;</span>
  80 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelDescriptorT<span class="special">,</span> <span class="keyword">typename</span> SeverityDescriptorT<span class="special">,</span>
  81          <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> <span class="keyword">typename</span> SeverityCompareT<span class="special">&gt;</span>
  82   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">ChannelDescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">SeverityDescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
  83   <span class="identifier">channel_severity_filter</span><span class="special">(</span><a class="link" href="attribute_keyword.html" title="Struct template attribute_keyword">attribute_keyword</a><span class="special">&lt;</span> <span class="identifier">ChannelDescriptorT</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> channel_keyword<span class="special">,</span>
  84                           <a class="link" href="attribute_keyword.html" title="Struct template attribute_keyword">attribute_keyword</a><span class="special">&lt;</span> <span class="identifier">SeverityDescriptorT</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> severity_keyword<span class="special">,</span>
  85                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">)</span><span class="special">;</span>
  86 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> ChannelFallbackT<span class="special">,</span>
  87          <span class="keyword">typename</span> ChannelTagT<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>
  88          <span class="keyword">typename</span> SeverityCompareT<span class="special">&gt;</span>
  89   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">ChannelFallbackT</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
  90   <span class="identifier">channel_severity_filter</span><span class="special">(</span><a class="link" href="attribute_actor.html" title="Class template attribute_actor">attribute_actor</a><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">ChannelFallbackT</span><span class="special">,</span> <span class="identifier">ChannelTagT</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> channel_placeholder<span class="special">,</span>
  91                           <span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">,</span>
  92                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">)</span><span class="special">;</span>
  93 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> SeverityFallbackT<span class="special">,</span>
  94          <span class="keyword">typename</span> SeverityTagT<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>
  95          <span class="keyword">typename</span> SeverityCompareT<span class="special">&gt;</span>
  96   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">SeverityFallbackT</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
  97   <span class="identifier">channel_severity_filter</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_name<span class="special">,</span>
  98                           <a class="link" href="attribute_actor.html" title="Class template attribute_actor">attribute_actor</a><span class="special">&lt;</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">SeverityFallbackT</span><span class="special">,</span> <span class="identifier">SeverityTagT</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> severity_placeholder<span class="special">,</span>
  99                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">)</span><span class="special">;</span>
 100 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> ChannelFallbackT<span class="special">,</span> <span class="keyword">typename</span> ChannelTagT<span class="special">,</span>
 101          <span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> SeverityFallbackT<span class="special">,</span>
 102          <span class="keyword">typename</span> SeverityTagT<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>
 103          <span class="keyword">typename</span> SeverityCompareT<span class="special">&gt;</span>
 104   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">ChannelFallbackT</span><span class="special">,</span> <span class="identifier">SeverityFallbackT</span><span class="special">,</span> <span class="identifier">less</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
 105   <span class="identifier">channel_severity_filter</span><span class="special">(</span><a class="link" href="attribute_actor.html" title="Class template attribute_actor">attribute_actor</a><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">ChannelFallbackT</span><span class="special">,</span> <span class="identifier">ChannelTagT</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> channel_placeholder<span class="special">,</span>
 106                           <a class="link" href="attribute_actor.html" title="Class template attribute_actor">attribute_actor</a><span class="special">&lt;</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">SeverityFallbackT</span><span class="special">,</span> <span class="identifier">SeverityTagT</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> severity_placeholder<span class="special">,</span>
 107                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">)</span><span class="special">;</span>
 108 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> SeverityCompareT<span class="special">,</span>
 109          <span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
 110   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">ChannelOrderT</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span> <span class="special">&gt;</span>
 111   <span class="identifier">channel_severity_filter</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_name<span class="special">,</span>
 112                           <span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">,</span>
 113                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
 114                           <span class="identifier">ChannelOrderT</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_order<span class="special">)</span><span class="special">;</span>
 115 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> ChannelDescriptorT<span class="special">,</span>
 116          <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> <span class="keyword">typename</span> SeverityCompareT<span class="special">,</span>
 117          <span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
 118   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">ChannelDescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">ChannelOrderT</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
 119   <span class="identifier">channel_severity_filter</span><span class="special">(</span><a class="link" href="attribute_keyword.html" title="Struct template attribute_keyword">attribute_keyword</a><span class="special">&lt;</span> <span class="identifier">ChannelDescriptorT</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> channel_keyword<span class="special">,</span>
 120                           <span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">,</span>
 121                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
 122                           <span class="identifier">ChannelOrderT</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_order<span class="special">)</span><span class="special">;</span>
 123 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> SeverityDescriptorT<span class="special">,</span>
 124          <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> <span class="keyword">typename</span> SeverityCompareT<span class="special">,</span>
 125          <span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
 126   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">SeverityDescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">ChannelOrderT</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
 127   <span class="identifier">channel_severity_filter</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_name<span class="special">,</span>
 128                           <a class="link" href="attribute_keyword.html" title="Struct template attribute_keyword">attribute_keyword</a><span class="special">&lt;</span> <span class="identifier">SeverityDescriptorT</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> severity_keyword<span class="special">,</span>
 129                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
 130                           <span class="identifier">ChannelOrderT</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_order<span class="special">)</span><span class="special">;</span>
 131 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelDescriptorT<span class="special">,</span> <span class="keyword">typename</span> SeverityDescriptorT<span class="special">,</span>
 132          <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> <span class="keyword">typename</span> SeverityCompareT<span class="special">,</span>
 133          <span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
 134   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">ChannelDescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">SeverityDescriptorT</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">ChannelOrderT</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
 135   <span class="identifier">channel_severity_filter</span><span class="special">(</span><a class="link" href="attribute_keyword.html" title="Struct template attribute_keyword">attribute_keyword</a><span class="special">&lt;</span> <span class="identifier">ChannelDescriptorT</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> channel_keyword<span class="special">,</span>
 136                           <a class="link" href="attribute_keyword.html" title="Struct template attribute_keyword">attribute_keyword</a><span class="special">&lt;</span> <span class="identifier">SeverityDescriptorT</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> severity_keyword<span class="special">,</span>
 137                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
 138                           <span class="identifier">ChannelOrderT</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_order<span class="special">)</span><span class="special">;</span>
 139 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> ChannelFallbackT<span class="special">,</span>
 140          <span class="keyword">typename</span> ChannelTagT<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>
 141          <span class="keyword">typename</span> SeverityCompareT<span class="special">,</span> <span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
 142   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">ChannelFallbackT</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">ChannelOrderT</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
 143   <span class="identifier">channel_severity_filter</span><span class="special">(</span><a class="link" href="attribute_actor.html" title="Class template attribute_actor">attribute_actor</a><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">ChannelFallbackT</span><span class="special">,</span> <span class="identifier">ChannelTagT</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> channel_placeholder<span class="special">,</span>
 144                           <span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">,</span>
 145                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
 146                           <span class="identifier">ChannelOrderT</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_order<span class="special">)</span><span class="special">;</span>
 147 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> SeverityFallbackT<span class="special">,</span>
 148          <span class="keyword">typename</span> SeverityTagT<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>
 149          <span class="keyword">typename</span> SeverityCompareT<span class="special">,</span> <span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
 150   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">fallback_to_none</span><span class="special">,</span> <span class="identifier">SeverityFallbackT</span><span class="special">,</span> <span class="identifier">ChannelOrderT</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
 151   <span class="identifier">channel_severity_filter</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_name<span class="special">,</span>
 152                           <a class="link" href="attribute_actor.html" title="Class template attribute_actor">attribute_actor</a><span class="special">&lt;</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">SeverityFallbackT</span><span class="special">,</span> <span class="identifier">SeverityTagT</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> severity_placeholder<span class="special">,</span>
 153                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
 154                           <span class="identifier">ChannelOrderT</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_order<span class="special">)</span><span class="special">;</span>
 155 <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> ChannelT<span class="special">,</span> <span class="keyword">typename</span> ChannelFallbackT<span class="special">,</span> <span class="keyword">typename</span> ChannelTagT<span class="special">,</span>
 156          <span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> SeverityFallbackT<span class="special">,</span>
 157          <span class="keyword">typename</span> SeverityTagT<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>
 158          <span class="keyword">typename</span> SeverityCompareT<span class="special">,</span> <span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
 159   <span class="identifier">channel_severity_filter_actor</span><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">ChannelFallbackT</span><span class="special">,</span> <span class="identifier">SeverityFallbackT</span><span class="special">,</span> <span class="identifier">ChannelOrderT</span><span class="special">,</span> <span class="identifier">SeverityCompareT</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">allocator</span><span class="special">&lt;</span> <span class="keyword">void</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">ActorT</span> <span class="special">&gt;</span>
 160   <span class="identifier">channel_severity_filter</span><span class="special">(</span><a class="link" href="attribute_actor.html" title="Class template attribute_actor">attribute_actor</a><span class="special">&lt;</span> <span class="identifier">ChannelT</span><span class="special">,</span> <span class="identifier">ChannelFallbackT</span><span class="special">,</span> <span class="identifier">ChannelTagT</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> channel_placeholder<span class="special">,</span>
 161                           <a class="link" href="attribute_actor.html" title="Class template attribute_actor">attribute_actor</a><span class="special">&lt;</span> <span class="identifier">SeverityT</span><span class="special">,</span> <span class="identifier">SeverityFallbackT</span><span class="special">,</span> <span class="identifier">SeverityTagT</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> severity_placeholder<span class="special">,</span>
 162                           <span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
 163                           <span class="identifier">ChannelOrderT</span> <span class="keyword">const</span> <span class="special">&amp;</span> channel_order<span class="special">)</span><span class="special">;</span></pre></div>
 164 <div class="refsect1">
 165 <a name="idm45554741118464"></a><h2>Description</h2>
 166 <p>The function generates a filtering predicate that checks the severity levels of log records in different channels. The predicate will return <code class="computeroutput">true</code> if the record severity level is not less than the threshold for the channel the record belongs to. </p>
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 171 <td align="right"><div class="copyright-footer">Copyright &#169; 2007-2016 Andrey Semashev<p>
 172         Distributed under the Boost Software License, Version 1.0. (See accompanying
 173         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>).
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