FM / accumulators

/usr/include/boost/accumulators/framework/accumulators/

/usr/include/boost/accumulators/framework/accumulators

Name	Size	Mode	Actions
droppable_accumulator.hpp	10136	0644	edit dl rm
external_accumulator.hpp	3606	0644	edit dl rm
reference_accumulator.hpp	2537	0644	edit dl rm
value_accumulator.hpp	2420	0644	edit dl rm

Edit: /usr/include/boost/accumulators/framework/accumulators/reference_accumulator.hpp (2537B)

#ifndef BOOST_ACCUMULATORS_FRAMEWORK_ACCUMULATORS_REFERENCE_ACCUMULATOR_HPP_EAN_03_23_2006
#define BOOST_ACCUMULATORS_FRAMEWORK_ACCUMULATORS_REFERENCE_ACCUMULATOR_HPP_EAN_03_23_2006

#include <boost/ref.hpp>
#include <boost/mpl/always.hpp>
#include <boost/parameter/keyword.hpp>
#include <boost/accumulators/framework/depends_on.hpp> // for feature_tag
#include <boost/accumulators/framework/accumulator_base.hpp>
#include <boost/accumulators/framework/extractor.hpp>

namespace boost { namespace accumulators
{

namespace impl
{
    //////////////////////////////////////////////////////////////////////////
    // reference_accumulator_impl
    //
    template<typename Referent, typename Tag>
    struct reference_accumulator_impl
      : accumulator_base
    {
        typedef Referent &result_type;

template<typename Args>
        reference_accumulator_impl(Args const &args)
          : ref(args[parameter::keyword<Tag>::instance])
        {
        }

result_type result(dont_care) const
        {
            return this->ref;
        }

private:
        reference_wrapper<Referent> ref;
    };
} // namespace impl

namespace tag
{
    //////////////////////////////////////////////////////////////////////////
    // reference_tag
    template<typename Tag>
    struct reference_tag
    {
    };

//////////////////////////////////////////////////////////////////////////
    // reference
    template<typename Referent, typename Tag>
    struct reference
      : depends_on<>
    {
        /// INTERNAL ONLY
        ///
        typedef mpl::always<accumulators::impl::reference_accumulator_impl<Referent, Tag> > impl;
    };
}

namespace extract
{
    BOOST_ACCUMULATORS_DEFINE_EXTRACTOR(tag, reference, (typename)(typename))
    BOOST_ACCUMULATORS_DEFINE_EXTRACTOR(tag, reference_tag, (typename))
}

using extract::reference;
using extract::reference_tag;

// Map all reference<V,T> features to reference_tag<T> so
// that references can be extracted using reference_tag<T>
// without specifying the referent type.
template<typename ValueType, typename Tag>
struct feature_of<tag::reference<ValueType, Tag> >
  : feature_of<tag::reference_tag<Tag> >
{
};

}} // namespace boost::accumulators

#endif

/////////////////////////////////////////////////////////////////////////////// // reference_accumulator.hpp // // Copyright 2005 Eric Niebler. Distributed under the Boost // Software License, Version 1.0. (See accompanying file // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) #ifndef BOOST_ACCUMULATORS_FRAMEWORK_ACCUMULATORS_REFERENCE_ACCUMULATOR_HPP_EAN_03_23_2006 #define BOOST_ACCUMULATORS_FRAMEWORK_ACCUMULATORS_REFERENCE_ACCUMULATOR_HPP_EAN_03_23_2006 #include #include #include #include // for feature_tag #include #include namespace boost { namespace accumulators { namespace impl { ////////////////////////////////////////////////////////////////////////// // reference_accumulator_impl // template struct reference_accumulator_impl : accumulator_base { typedef Referent &result_type; template reference_accumulator_impl(Args const &args) : ref(args[parameter::keyword::instance]) { } result_type result(dont_care) const { return this->ref; } private: reference_wrapper ref; }; } // namespace impl namespace tag { ////////////////////////////////////////////////////////////////////////// // reference_tag template struct reference_tag { }; ////////////////////////////////////////////////////////////////////////// // reference template struct reference : depends_on<> { /// INTERNAL ONLY /// typedef mpl::always > impl; }; } namespace extract { BOOST_ACCUMULATORS_DEFINE_EXTRACTOR(tag, reference, (typename)(typename)) BOOST_ACCUMULATORS_DEFINE_EXTRACTOR(tag, reference_tag, (typename)) } using extract::reference; using extract::reference_tag; // Map all reference features to reference_tag so // that references can be extracted using reference_tag // without specifying the referent type. template struct feature_of > : feature_of > { }; }} // namespace boost::accumulators #endif