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// (C) Copyright Gennadiy Rozental 2011-2014.
// 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)
// See http://www.boost.org/libs/test for the library home page.
//
//! @file
//! Defines dataset join operation
// ***************************************************************************
#ifndef BOOST_TEST_DATA_MONOMORPHIC_JOIN_HPP_112711GER
#define BOOST_TEST_DATA_MONOMORPHIC_JOIN_HPP_112711GER
// Boost.Test
#include <boost/test/data/config.hpp>
#include <boost/test/data/monomorphic/dataset.hpp>
#include <boost/test/detail/suppress_warnings.hpp>
//____________________________________________________________________________//
namespace boost {
namespace unit_test {
namespace data {
namespace monomorphic {
// ************************************************************************** //
// ************** join ************** //
// ************************************************************************** //
//! Defines a new dataset from the concatenation of two datasets
//!
//! The size of the resulting dataset is the sum of the two underlying datasets. The arity of the datasets
//! should match.
template<typename DS1, typename DS2>
class join : public monomorphic::dataset<typename boost::decay<DS1>::type::data_type> {
typedef typename boost::decay<DS1>::type::data_type T;
typedef monomorphic::dataset<T> base;
typedef typename base::iter_ptr iter_ptr;
struct iterator : public base::iterator {
// Constructor
explicit iterator( iter_ptr it1, iter_ptr it2, data::size_t first_size )
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
: m_it1( std::move(it1) )
, m_it2( std::move(it2) )
#else
: m_it1( it1 )
, m_it2( it2 )
#endif
, m_first_size( first_size )
{}
// forward iterator interface
virtual T const& operator*() { return m_first_size > 0 ? **m_it1 : **m_it2; }
virtual void operator++() { m_first_size > 0 ? (--m_first_size,++(*m_it1)) : ++(*m_it2); }
private:
// Data members
iter_ptr m_it1;
iter_ptr m_it2;
data::size_t m_first_size;
};
public:
enum { arity = boost::decay<DS1>::type::arity };
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
// Constructor
join( DS1&& ds1, DS2&& ds2 )
: m_ds1( std::forward<DS1>( ds1 ) )
, m_ds2( std::forward<DS2>( ds2 ) )
{}
// Move constructor
join( join&& j )
: m_ds1( std::forward<DS1>( j.m_ds1 ) )
, m_ds2( std::forward<DS2>( j.m_ds2 ) )
{}
#else
// Constructor
join( DS1 const& ds1, DS2 const& ds2 )
: m_ds1( ds1 )
, m_ds2( ds2 )
{}
#endif
// dataset interface
virtual data::size_t size() const { return m_ds1.size() + m_ds2.size(); }
virtual iter_ptr begin() const { return boost::make_shared<iterator>( m_ds1.begin(),
m_ds2.begin(),
m_ds1.size() ); }
private:
// Data members
DS1 m_ds1;
DS2 m_ds2;
};
//____________________________________________________________________________//
// A joined dataset is a dataset.
template<typename DS1, typename DS2>
struct is_dataset<join<DS1,DS2> > : mpl::true_ {};
//____________________________________________________________________________//
namespace result_of {
//! Result type of the join operation on datasets.
template<typename DS1Gen, typename DS2Gen>
struct join {
typedef monomorphic::join<typename DS1Gen::type,typename DS2Gen::type> type;
};
} // namespace result_of
//____________________________________________________________________________//
template<typename DS1, typename DS2>
inline typename boost::lazy_enable_if_c<is_dataset<DS1>::value && is_dataset<DS2>::value,
result_of::join<mpl::identity<DS1>,mpl::identity<DS2> >
>::type
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
operator+( DS1&& ds1, DS2&& ds2 )
{
return join<DS1,DS2>( std::forward<DS1>( ds1 ), std::forward<DS2>( ds2 ) );
}
#else
operator+( DS1 const& ds1, DS2 const& ds2 )
{
return join<DS1,DS2>( ds1, ds2 );
}
#endif
//____________________________________________________________________________//
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
template<typename DS1, typename DS2>
inline typename boost::lazy_enable_if_c<is_dataset<DS1>::value && !is_dataset<DS2>::value,
result_of::join<mpl::identity<DS1>,data::result_of::make<DS2> >
>::type
operator+( DS1&& ds1, DS2&& ds2 )
{
return std::forward<DS1>(ds1) + data::make(std::forward<DS2>(ds2));
}
#else
template<typename DS1, typename DS2>
inline typename boost::lazy_enable_if_c<is_dataset<DS1>::value && !is_dataset<DS2>::value,
result_of::join<mpl::identity<DS1>,data::result_of::make<DS2> >
>::type
operator+( DS1 const& ds1, DS2 const& ds2 )
{
return ds1 + data::make(ds2);
}
#endif
//____________________________________________________________________________//
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
template<typename DS1, typename DS2>
inline typename boost::lazy_enable_if_c<!is_dataset<DS1>::value && is_dataset<DS2>::value,
result_of::join<data::result_of::make<DS1>,mpl::identity<DS2> >
>::type
operator+( DS1&& ds1, DS2&& ds2 )
{
return data::make(std::forward<DS1>(ds1)) + std::forward<DS2>(ds2);
}
#else
template<typename DS1, typename DS2>
inline typename boost::lazy_enable_if_c<!is_dataset<DS1>::value && is_dataset<DS2>::value,
result_of::join<data::result_of::make<DS1>,mpl::identity<DS2> >
>::type
operator+( DS1 const& ds1, DS2 const& ds2 )
{
return data::make(ds1) + ds2;
}
#endif
} // namespace monomorphic
} // namespace data
} // namespace unit_test
} // namespace boost
#include <boost/test/detail/enable_warnings.hpp>
#endif // BOOST_TEST_DATA_MONOMORPHIC_JOIN_HPP_112711GER
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