//---------------------------------------------------------------------------//
|
// Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
|
//
|
// 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://boostorg.github.com/compute for more information.
|
//---------------------------------------------------------------------------//
|
|
#ifndef BOOST_COMPUTE_UTILITY_DIM_HPP
|
#define BOOST_COMPUTE_UTILITY_DIM_HPP
|
|
#include <boost/compute/config.hpp>
|
#include <boost/compute/utility/extents.hpp>
|
|
namespace boost {
|
namespace compute {
|
|
#ifndef BOOST_COMPUTE_NO_VARIADIC_TEMPLATES
|
/// The variadic \c dim() function provides a concise syntax for creating
|
/// \ref extents objects.
|
///
|
/// For example,
|
/// \code
|
/// extents<2> region = dim(640, 480); // region == (640, 480)
|
/// \endcode
|
///
|
/// \see \ref extents "extents<N>"
|
template<class... Args>
|
inline extents<sizeof...(Args)> dim(Args... args)
|
{
|
return extents<sizeof...(Args)>({ static_cast<size_t>(args)... });
|
}
|
|
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1800)
|
// for some inexplicable reason passing one parameter to 'dim' variadic template
|
// generates compile error on msvc 2013 update 4
|
template<class T>
|
inline extents<1> dim(T arg)
|
{
|
return extents<1>(static_cast<size_t>(arg));
|
}
|
#endif // BOOST_WORKAROUND(BOOST_MSVC, <= 1800)
|
|
#else
|
// dim() function definitions for non-c++11 compilers
|
#define BOOST_COMPUTE_DETAIL_ASSIGN_DIM(z, n, var) \
|
var[n] = BOOST_PP_CAT(e, n);
|
|
#define BOOST_COMPUTE_DETAIL_DEFINE_DIM(z, n, var) \
|
inline extents<n> dim(BOOST_PP_ENUM_PARAMS(n, size_t e)) \
|
{ \
|
extents<n> exts; \
|
BOOST_PP_REPEAT(n, BOOST_COMPUTE_DETAIL_ASSIGN_DIM, exts) \
|
return exts; \
|
}
|
|
BOOST_PP_REPEAT(BOOST_COMPUTE_MAX_ARITY, BOOST_COMPUTE_DETAIL_DEFINE_DIM, ~)
|
|
#undef BOOST_COMPUTE_DETAIL_ASSIGN_DIM
|
#undef BOOST_COMPUTE_DETAIL_DEFINE_DIM
|
|
#endif // BOOST_COMPUTE_NO_VARIADIC_TEMPLATES
|
|
/// \internal_
|
template<size_t N>
|
inline extents<N> dim()
|
{
|
return extents<N>();
|
}
|
|
} // end compute namespace
|
} // end boost namespace
|
|
#endif // BOOST_COMPUTE_UTILITY_DIM_HPP
|
