Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
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; template<typename Feature> struct apply { }; // construct/copy/destruct template<typename A1> 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
Parameters: |
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template<typename FilterPred, typename UnaryFunction> void visit_if(UnaryFunction const & func) ;
Conditional visitation
Parameters: |
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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;
template<typename Feature> void drop() ;
Drop