Boost C++ Libraries

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Function template has_attr

boost::log::expressions::has_attr

Synopsis

// In header: <boost/log/expressions/predicates/has_attr.hpp>


template<typename AttributeValueT> 
  unspecified has_attr(attribute_name const & name);

Description

The function generates a terminal node in a template expression. The node will check for the attribute value presence in a log record. The node will also check that the attribute value has the specified type, if present.