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boost::log::extract
// In header: <boost/log/attributes/value_extraction.hpp> template<typename T, typename TagT = void> result_of::extract< T, TagT >::type extract(attribute_name const & name, record_view const & rec);
The function extracts 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 extracted.
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| Returns: | A  |