215 lines
7.1 KiB
C++
215 lines
7.1 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2005-2006 Joao Abecasis
|
|
Copyright (c) 2006-2007 Tobias Schwinger
|
|
|
|
Use modification and distribution are subject to 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).
|
|
==============================================================================*/
|
|
|
|
#if !defined(BOOST_FUSION_FUNCTIONAL_INVOCATION_INVOKE_FUNCTION_OBJECT_HPP_INCLUDED)
|
|
#if !defined(BOOST_PP_IS_ITERATING)
|
|
|
|
#include <boost/preprocessor/cat.hpp>
|
|
#include <boost/preprocessor/iteration/iterate.hpp>
|
|
#include <boost/preprocessor/arithmetic/dec.hpp>
|
|
#include <boost/preprocessor/repetition/repeat_from_to.hpp>
|
|
#include <boost/preprocessor/repetition/enum.hpp>
|
|
#include <boost/preprocessor/repetition/enum_params.hpp>
|
|
|
|
#include <boost/utility/result_of.hpp>
|
|
#include <boost/core/enable_if.hpp>
|
|
|
|
#include <boost/type_traits/remove_reference.hpp>
|
|
#include <boost/type_traits/remove_const.hpp>
|
|
|
|
#include <boost/fusion/support/category_of.hpp>
|
|
#include <boost/fusion/sequence/intrinsic/size.hpp>
|
|
#include <boost/fusion/sequence/intrinsic/at.hpp>
|
|
#include <boost/fusion/sequence/intrinsic/begin.hpp>
|
|
#include <boost/fusion/iterator/next.hpp>
|
|
#include <boost/fusion/iterator/deref.hpp>
|
|
#include <boost/fusion/functional/invocation/limits.hpp>
|
|
|
|
namespace boost { namespace fusion
|
|
{
|
|
namespace detail
|
|
{
|
|
template<
|
|
class Function, class Sequence,
|
|
int N = result_of::size<Sequence>::value,
|
|
bool RandomAccess = traits::is_random_access<Sequence>::value,
|
|
typename Enable = void
|
|
>
|
|
struct invoke_function_object_impl;
|
|
|
|
template <class Sequence, int N>
|
|
struct invoke_function_object_param_types;
|
|
|
|
#define BOOST_PP_FILENAME_1 \
|
|
<boost/fusion/functional/invocation/invoke_function_object.hpp>
|
|
#define BOOST_PP_ITERATION_LIMITS \
|
|
(0, BOOST_FUSION_INVOKE_FUNCTION_OBJECT_MAX_ARITY)
|
|
#include BOOST_PP_ITERATE()
|
|
}
|
|
|
|
namespace result_of
|
|
{
|
|
template <class Function, class Sequence, class Enable = void>
|
|
struct invoke_function_object;
|
|
|
|
template <class Function, class Sequence>
|
|
struct invoke_function_object<Function, Sequence,
|
|
typename enable_if_has_type<
|
|
typename detail::invoke_function_object_impl<
|
|
typename boost::remove_reference<Function>::type, Sequence
|
|
>::result_type
|
|
>::type>
|
|
{
|
|
typedef typename detail::invoke_function_object_impl<
|
|
typename boost::remove_reference<Function>::type, Sequence
|
|
>::result_type type;
|
|
};
|
|
}
|
|
|
|
template <class Function, class Sequence>
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
inline typename result_of::invoke_function_object<Function,Sequence>::type
|
|
invoke_function_object(Function f, Sequence & s)
|
|
{
|
|
return detail::invoke_function_object_impl<
|
|
typename boost::remove_reference<Function>::type,Sequence
|
|
>::call(f,s);
|
|
}
|
|
|
|
template <class Function, class Sequence>
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
inline typename result_of::invoke_function_object<Function,Sequence const>::type
|
|
invoke_function_object(Function f, Sequence const & s)
|
|
{
|
|
return detail::invoke_function_object_impl<
|
|
typename boost::remove_reference<Function>::type,Sequence const
|
|
>::call(f,s);
|
|
}
|
|
|
|
}}
|
|
|
|
#define BOOST_FUSION_FUNCTIONAL_INVOCATION_INVOKE_FUNCTION_OBJECT_HPP_INCLUDED
|
|
#else // defined(BOOST_PP_IS_ITERATING)
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Preprocessor vertical repetition code
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
#define N BOOST_PP_ITERATION()
|
|
|
|
#define M(z,j,data) \
|
|
typename result_of::at_c<Sequence,j>::type
|
|
|
|
template <class Function, class Sequence>
|
|
struct invoke_function_object_impl<Function,Sequence,N,true,
|
|
typename enable_if_has_type<
|
|
typename boost::result_of<Function (BOOST_PP_ENUM(N,M,~)) >::type
|
|
>::type>
|
|
{
|
|
public:
|
|
|
|
typedef typename boost::result_of<
|
|
Function (BOOST_PP_ENUM(N,M,~)) >::type result_type;
|
|
#undef M
|
|
|
|
#if N > 0
|
|
|
|
template <class F>
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
static inline result_type
|
|
call(F & f, Sequence & s)
|
|
{
|
|
#define M(z,j,data) fusion::at_c<j>(s)
|
|
return f( BOOST_PP_ENUM(N,M,~) );
|
|
#undef M
|
|
}
|
|
|
|
#else
|
|
|
|
template <class F>
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
static inline result_type
|
|
call(F & f, Sequence & /*s*/)
|
|
{
|
|
return f();
|
|
}
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
#define M(z,j,data) \
|
|
typename invoke_function_object_param_types<Sequence,N>::T ## j
|
|
|
|
template <class Function, class Sequence>
|
|
struct invoke_function_object_impl<Function,Sequence,N,false,
|
|
typename enable_if_has_type<
|
|
typename boost::result_of<Function (BOOST_PP_ENUM(N,M,~)) >::type
|
|
>::type>
|
|
#undef M
|
|
{
|
|
private:
|
|
typedef invoke_function_object_param_types<Sequence,N> seq;
|
|
public:
|
|
typedef typename boost::result_of<
|
|
Function (BOOST_PP_ENUM_PARAMS(N,typename seq::T))
|
|
>::type result_type;
|
|
|
|
#if N > 0
|
|
|
|
template <class F>
|
|
BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
static inline result_type
|
|
call(F & f, Sequence & s)
|
|
{
|
|
typename seq::I0 i0 = fusion::begin(s);
|
|
#define M(z,j,data) \
|
|
typename seq::I##j i##j = \
|
|
fusion::next(BOOST_PP_CAT(i,BOOST_PP_DEC(j)));
|
|
BOOST_PP_REPEAT_FROM_TO(1,N,M,~)
|
|
#undef M
|
|
return f( BOOST_PP_ENUM_PARAMS(N,*i) );
|
|
}
|
|
|
|
#else
|
|
|
|
template <class F>
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
static inline result_type
|
|
call(F & f, Sequence & /*s*/)
|
|
{
|
|
return f();
|
|
}
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
template <class Sequence>
|
|
struct invoke_function_object_param_types<Sequence,N>
|
|
{
|
|
#if N > 0
|
|
typedef typename result_of::begin<Sequence>::type I0;
|
|
typedef typename result_of::deref<I0>::type T0;
|
|
|
|
#define M(z,i,data) \
|
|
typedef typename result_of::next< \
|
|
BOOST_PP_CAT(I,BOOST_PP_DEC(i))>::type I##i; \
|
|
typedef typename result_of::deref<I##i>::type T##i;
|
|
|
|
BOOST_PP_REPEAT_FROM_TO(1,N,M,~)
|
|
#undef M
|
|
#endif
|
|
};
|
|
|
|
#undef N
|
|
#endif // defined(BOOST_PP_IS_ITERATING)
|
|
#endif
|
|
|