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boost::log::visit
// In header: <boost/log/attributes/value_visitation.hpp> template<typename DescriptorT, template< typename > class ActorT, typename VisitorT> visitation_result visit(expressions::attribute_keyword< DescriptorT, ActorT > const & keyword, attribute_value_set const & attrs, VisitorT visitor);
The function applies a visitor to an attribute value from the view. The user has to explicitly specify the type or set of possible types of the attribute value to be visited.
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The result of visitation. |