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// (C) Copyright Gennadiy Rozental 2001.
// 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 monomorphic dataset based on zipping of 2 other monomorphic datasets
// ***************************************************************************
#ifndef BOOST_TEST_DATA_MONOMORPHIC_ZIP_HPP_102211GER
#define BOOST_TEST_DATA_MONOMORPHIC_ZIP_HPP_102211GER
// Boost.Test
#include <boost/test/data/config.hpp>
#if !defined(BOOST_TEST_NO_ZIP_COMPOSITION_AVAILABLE) || defined(BOOST_TEST_DOXYGEN_DOC__)
#include <boost/test/data/monomorphic/fwd.hpp>
#include <boost/test/data/monomorphic/sample_merge.hpp>
#include <boost/test/detail/suppress_warnings.hpp>
namespace boost {
namespace unit_test {
namespace data {
namespace monomorphic {
// ************************************************************************** //
// ************** zip ************** //
// ************************************************************************** //
//! Zip datasets
//!
//! A zip of two datasets is a dataset whose arity is the sum of the operand datasets arity. The size is given by
//! the function creating the instance (see @c operator^ on datasets).
template<typename DataSet1, typename DataSet2>
class zip {
typedef typename boost::decay<DataSet1>::type dataset1_decay;
typedef typename boost::decay<DataSet2>::type dataset2_decay;
typedef typename dataset1_decay::iterator dataset1_iter;
typedef typename dataset2_decay::iterator dataset2_iter;
public:
enum { arity = dataset1_decay::arity + dataset2_decay::arity };
struct iterator {
// Constructor
explicit iterator( dataset1_iter iter1, dataset2_iter iter2 )
: m_iter1( std::move( iter1 ) )
, m_iter2( std::move( iter2 ) )
{}
using iterator_sample = decltype(
sample_merge( *std::declval<dataset1_iter>(),
*std::declval<dataset2_iter>()) );
// forward iterator interface
auto operator*() const -> iterator_sample {
return sample_merge( *m_iter1, *m_iter2 );
}
void operator++() { ++m_iter1; ++m_iter2; }
private:
// Data members
dataset1_iter m_iter1;
dataset2_iter m_iter2;
};
typedef typename iterator::iterator_sample sample;
//! Constructor
//!
//! The datasets are moved and not copied.
zip( DataSet1&& ds1, DataSet2&& ds2, data::size_t size )
: m_ds1( std::forward<DataSet1>( ds1 ) )
, m_ds2( std::forward<DataSet2>( ds2 ) )
, m_size( size )
{}
//! Move constructor
zip( zip&& j )
: m_ds1( std::forward<DataSet1>( j.m_ds1 ) )
, m_ds2( std::forward<DataSet2>( j.m_ds2 ) )
, m_size( j.m_size )
{}
// dataset interface
data::size_t size() const { return m_size; }
iterator begin() const { return iterator( m_ds1.begin(), m_ds2.begin() ); }
private:
// Data members
DataSet1 m_ds1;
DataSet2 m_ds2;
data::size_t m_size;
};
//____________________________________________________________________________//
//! Zipped datasets results in a dataset.
template<typename DataSet1, typename DataSet2>
struct is_dataset<zip<DataSet1,DataSet2>> : mpl::true_ {};
//____________________________________________________________________________//
namespace ds_detail {
//! Handles the sise of the resulting zipped dataset.
template<typename DataSet1, typename DataSet2>
inline data::size_t
zip_size( DataSet1&& ds1, DataSet2&& ds2 )
{
data::size_t ds1_size = ds1.size();
data::size_t ds2_size = ds2.size();
if( ds1_size == ds2_size )
return ds1_size;
if( ds1_size == 1 || ds1_size.is_inf() )
return ds2_size;
if( ds2_size == 1 || ds2_size.is_inf() )
return ds1_size;
BOOST_TEST_DS_ERROR( "Can't zip datasets of different sizes" );
}
} // namespace ds_detail
//____________________________________________________________________________//
namespace result_of {
//! Result type of the zip operator.
template<typename DS1Gen, typename DS2Gen>
struct zip {
typedef monomorphic::zip<typename DS1Gen::type,typename DS2Gen::type> type;
};
} // namespace result_of
//____________________________________________________________________________//
//! Overload operator for zip support
template<typename DataSet1, typename DataSet2>
inline typename boost::lazy_enable_if_c<is_dataset<DataSet1>::value && is_dataset<DataSet2>::value,
result_of::zip<mpl::identity<DataSet1>,mpl::identity<DataSet2>>
>::type
operator^( DataSet1&& ds1, DataSet2&& ds2 )
{
return zip<DataSet1,DataSet2>( std::forward<DataSet1>( ds1 ),
std::forward<DataSet2>( ds2 ),
ds_detail::zip_size( ds1, ds2 ) );
}
//____________________________________________________________________________//
//! @overload boost::unit_test::data::monomorphic::operator^()
template<typename DataSet1, typename DataSet2>
inline typename boost::lazy_enable_if_c<is_dataset<DataSet1>::value && !is_dataset<DataSet2>::value,
result_of::zip<mpl::identity<DataSet1>,data::result_of::make<DataSet2>>
>::type
operator^( DataSet1&& ds1, DataSet2&& ds2 )
{
return std::forward<DataSet1>( ds1 ) ^ data::make( std::forward<DataSet2>( ds2 ) );
}
//____________________________________________________________________________//
//! @overload boost::unit_test::data::monomorphic::operator^()
template<typename DataSet1, typename DataSet2>
inline typename boost::lazy_enable_if_c<!is_dataset<DataSet1>::value && is_dataset<DataSet2>::value,
result_of::zip<data::result_of::make<DataSet1>,mpl::identity<DataSet2>>
>::type
operator^( DataSet1&& ds1, DataSet2&& ds2 )
{
return data::make( std::forward<DataSet1>( ds1 ) ) ^ std::forward<DataSet2>( ds2 );
}
} // namespace monomorphic
} // namespace data
} // namespace unit_test
} // namespace boost
#include <boost/test/detail/enable_warnings.hpp>
#endif // BOOST_TEST_NO_ZIP_COMPOSITION_AVAILABLE
#endif // BOOST_TEST_DATA_MONOMORPHIC_ZIP_HPP_102211GER
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