Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

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.