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, 
        attribute_value_set const & attrs, 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:

`attrs`	A set of attribute values in which to look for the specified attribute value.
`keyword`	The keyword of the attribute value to visit.
`visitor`	A receiving function object to pass the attribute value to.

Returns:

The result of visitation.