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<title>Function channel_severity_filter</title>
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<h2><span class="refentrytitle">Function channel_severity_filter</span></h2>
<p>boost::log::expressions::channel_severity_filter</p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<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;
</span>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> SeverityFallbackT<span class="special">,</span>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">,</span>
<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>
<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>
<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>
<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>
<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>
<span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">,</span>
<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>
<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>
<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>
<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>
<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>
<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="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">)</span><span class="special">;</span>
<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>
<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>
<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>
<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>
<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="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">)</span><span class="special">;</span>
<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>
<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>
<span class="keyword">typename</span> SeverityCompareT<span class="special">&gt;</span>
<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>
<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>
<span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">,</span>
<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>
<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>
<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>
<span class="keyword">typename</span> SeverityCompareT<span class="special">&gt;</span>
<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>
<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>
<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="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">)</span><span class="special">;</span>
<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>
<span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> SeverityFallbackT<span class="special">,</span>
<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>
<span class="keyword">typename</span> SeverityCompareT<span class="special">&gt;</span>
<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>
<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>
<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="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">)</span><span class="special">;</span>
<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>
<span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
<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>
<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>
<span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">,</span>
<span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
<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>
<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>
<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>
<span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
<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>
<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>
<span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">,</span>
<span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
<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>
<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>
<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>
<span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
<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>
<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>
<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="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
<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>
<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>
<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>
<span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
<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>
<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>
<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="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
<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>
<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>
<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>
<span class="keyword">typename</span> SeverityCompareT<span class="special">,</span> <span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
<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>
<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>
<span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_name<span class="special">,</span>
<span class="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
<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>
<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>
<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>
<span class="keyword">typename</span> SeverityCompareT<span class="special">,</span> <span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
<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>
<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>
<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="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
<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>
<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>
<span class="keyword">typename</span> SeverityT<span class="special">,</span> <span class="keyword">typename</span> SeverityFallbackT<span class="special">,</span>
<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>
<span class="keyword">typename</span> SeverityCompareT<span class="special">,</span> <span class="keyword">typename</span> ChannelOrderT<span class="special">&gt;</span>
<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>
<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>
<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="identifier">SeverityCompareT</span> <span class="keyword">const</span> <span class="special">&amp;</span> severity_compare<span class="special">,</span>
<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>
<div class="refsect1">
<a name="idp117601312"></a><h2>Description</h2>
<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>
</div>
</div>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2007-2015 Andrey
Semashev<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
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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