Boost C++ Libraries

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Function template visit

boost::log::visit

Synopsis

// 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, 
        record_view const & rec, VisitorT visitor);

Description

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.

Parameters:

keyword

The keyword of the attribute value to visit.

rec

A log record view. The attribute value will be sought among those associated with the record.

visitor

A receiving function object to pass the attribute value to.

Returns:

The result of visitation.


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