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boost::accumulators::accumulator_set — A set of accumulators.
// In header: <boost/accumulators/framework/accumulator_set.hpp> template<typename Sample, typename Features, typename Weight> struct accumulator_set { // types typedef Sample sample_type; // The type of the samples that will be accumulated. typedef Features features_type; // An MPL sequence of the features that should be accumulated. typedef Weight weight_type; // The type of the weight parameter. Must be a scalar. Defaults to void. typedef void result_type; // member classes/structs/unions template<typename Feature> struct apply { }; // construct/copy/destruct template<typename A1> explicit accumulator_set(A1 const &); // public member functions template<typename UnaryFunction> void visit(UnaryFunction const &); template<typename FilterPred, typename UnaryFunction> void visit_if(UnaryFunction const &); void operator()(); template<typename A1> void operator()(A1 const &); template<typename Feature> apply< Feature >::type & extract(); template<typename Feature> apply< Feature >::type const & extract() const; template<typename Feature> void drop(); };
accumulator_set resolves the dependencies between features and ensures that the accumulators in the set are updated in the proper order.
acccumulator_set provides a general mechanism to visit the accumulators in the set in order, with or without a filter. You can also fetch a reference to an accumulator that corresponds to a feature.
accumulator_set public member functionstemplate<typename UnaryFunction> void visit(UnaryFunction const & func);
Visitation
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template<typename FilterPred, typename UnaryFunction> void visit_if(UnaryFunction const & func);
Conditional visitation
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void operator()();
Accumulation
template<typename A1> void operator()(A1 const & a1);
template<typename Feature> apply< Feature >::type & extract();
Extraction
template<typename Feature> apply< Feature >::type const & extract() const;
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
template<typename Feature> void drop();
Drop