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Struct template has_requirement

boost::log::sinks::has_requirement

Synopsis

// In header: <boost/log/sinks/frontend_requirements.hpp>

template<typename TestedT, typename RequiredT> 
struct has_requirement : public is_base_of< RequiredT, TestedT > {
};

Description

A helper metafunction to check if a requirement is satisfied. The TestedT template argument should be the type combining one or several requirements and RequiredT is the requirement to test against. The metafunction will yield a positive result if TestedT supports RequiredT.