forked from boostorg/fusion
creating branch for fusion 2.1
[SVN r40232]
This commit is contained in:
Joel de Guzman
306
include/boost/fusion/functional/invocation/invoke.hpp
Normal file
306
include/boost/fusion/functional/invocation/invoke.hpp
Normal file
@ -0,0 +1,306 @@
|
||||
/*=============================================================================
|
||||
Copyright (c) 2005-2006 João 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_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_shifted.hpp>
|
||||
#include <boost/preprocessor/repetition/enum_params.hpp>
|
||||
#include <boost/preprocessor/repetition/enum_shifted_params.hpp>
|
||||
|
||||
#include <boost/mpl/if.hpp>
|
||||
#include <boost/mpl/eval_if.hpp>
|
||||
#include <boost/mpl/or.hpp>
|
||||
#include <boost/mpl/front.hpp>
|
||||
#include <boost/mpl/identity.hpp>
|
||||
|
||||
#include <boost/type_traits/add_const.hpp>
|
||||
#include <boost/type_traits/remove_cv.hpp>
|
||||
#include <boost/type_traits/add_reference.hpp>
|
||||
#include <boost/type_traits/remove_reference.hpp>
|
||||
#include <boost/type_traits/is_convertible.hpp>
|
||||
|
||||
#include <boost/function_types/is_function.hpp>
|
||||
#include <boost/function_types/is_callable_builtin.hpp>
|
||||
#include <boost/function_types/is_member_pointer.hpp>
|
||||
#include <boost/function_types/is_member_function_pointer.hpp>
|
||||
#include <boost/function_types/result_type.hpp>
|
||||
#include <boost/function_types/parameter_types.hpp>
|
||||
|
||||
#include <boost/utility/result_of.hpp>
|
||||
|
||||
#include <boost/fusion/support/category_of.hpp>
|
||||
#include <boost/fusion/sequence/intrinsic/at.hpp>
|
||||
#include <boost/fusion/sequence/intrinsic/size.hpp>
|
||||
#include <boost/fusion/sequence/intrinsic/front.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>
|
||||
#include <boost/fusion/functional/invocation/detail/that_ptr.hpp>
|
||||
|
||||
namespace boost { namespace fusion
|
||||
{
|
||||
namespace result_of
|
||||
{
|
||||
template <typename Function, class Sequence> struct invoke;
|
||||
}
|
||||
|
||||
template <typename Function, class Sequence>
|
||||
inline typename result_of::invoke<Function, Sequence>::type
|
||||
invoke(Function, Sequence &);
|
||||
|
||||
template <typename Function, class Sequence>
|
||||
inline typename result_of::invoke<Function, Sequence const>::type
|
||||
invoke(Function, Sequence const &);
|
||||
|
||||
//----- ---- --- -- - - - -
|
||||
|
||||
namespace detail
|
||||
{
|
||||
namespace ft = function_types;
|
||||
|
||||
template<
|
||||
typename Function, class Sequence,
|
||||
int N = result_of::size<Sequence>::value,
|
||||
bool CBI = ft::is_callable_builtin<Function>::value,
|
||||
bool RandomAccess = traits::is_random_access<Sequence>::value
|
||||
>
|
||||
struct invoke_impl;
|
||||
|
||||
template <class Sequence, int N>
|
||||
struct invoke_param_types;
|
||||
|
||||
template <typename T, class Sequence>
|
||||
struct invoke_data_member;
|
||||
|
||||
template <typename Function, class Sequence, int N, bool RandomAccess>
|
||||
struct invoke_mem_fn;
|
||||
|
||||
#define BOOST_PP_FILENAME_1 <boost/fusion/functional/invocation/invoke.hpp>
|
||||
#define BOOST_PP_ITERATION_LIMITS (0, BOOST_FUSION_INVOKE_MAX_ARITY)
|
||||
#include BOOST_PP_ITERATE()
|
||||
|
||||
template <typename F, class Sequence, int N, bool RandomAccess>
|
||||
struct invoke_nonmember_builtin
|
||||
// use same implementation as for function objects but...
|
||||
: invoke_impl< // ...work around boost::result_of bugs
|
||||
typename mpl::eval_if< ft::is_function<F>,
|
||||
boost::add_reference<F>, boost::remove_cv<F> >::type,
|
||||
Sequence, N, false, RandomAccess >
|
||||
{ };
|
||||
|
||||
template <typename Function, class Sequence, int N, bool RandomAccess>
|
||||
struct invoke_impl<Function,Sequence,N,true,RandomAccess>
|
||||
: mpl::if_< ft::is_member_function_pointer<Function>,
|
||||
invoke_mem_fn<Function,Sequence,N,RandomAccess>,
|
||||
invoke_nonmember_builtin<Function,Sequence,N,RandomAccess>
|
||||
>::type
|
||||
{ };
|
||||
|
||||
template <typename Function, class Sequence, bool RandomAccess>
|
||||
struct invoke_impl<Function,Sequence,1,true,RandomAccess>
|
||||
: mpl::eval_if< ft::is_member_pointer<Function>,
|
||||
mpl::if_< ft::is_member_function_pointer<Function>,
|
||||
invoke_mem_fn<Function,Sequence,1,RandomAccess>,
|
||||
invoke_data_member<Function, Sequence> >,
|
||||
mpl::identity< invoke_nonmember_builtin<
|
||||
Function,Sequence,1,RandomAccess> >
|
||||
>::type
|
||||
{ };
|
||||
|
||||
template <typename T, class C, class Sequence>
|
||||
struct invoke_data_member< T C::*, Sequence >
|
||||
{
|
||||
private:
|
||||
|
||||
typedef typename result_of::front<Sequence>::type that;
|
||||
|
||||
typedef mpl::or_< boost::is_convertible<that,C*>,
|
||||
boost::is_convertible<that,C&>,
|
||||
non_const_pointee<that> > non_const_cond;
|
||||
|
||||
typedef typename mpl::eval_if< non_const_cond,
|
||||
mpl::identity<C>, add_const<C> >::type qualified_class;
|
||||
|
||||
typedef typename mpl::eval_if< non_const_cond,
|
||||
mpl::identity<T>, add_const<T> >::type qualified_type;
|
||||
|
||||
public:
|
||||
|
||||
typedef typename boost::add_reference<qualified_type>::type
|
||||
result_type;
|
||||
|
||||
static inline result_type call(T C::* f, Sequence & s)
|
||||
{
|
||||
typename result_of::front<Sequence>::type c = fusion::front(s);
|
||||
return that_ptr<qualified_class>::get(c)->*f;
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
namespace result_of
|
||||
{
|
||||
template <typename Function, class Sequence> struct invoke
|
||||
{
|
||||
typedef typename detail::invoke_impl<
|
||||
typename boost::remove_reference<Function>::type, Sequence
|
||||
>::result_type type;
|
||||
};
|
||||
}
|
||||
|
||||
template <typename Function, class Sequence>
|
||||
inline typename result_of::invoke<Function,Sequence>::type
|
||||
invoke(Function f, Sequence & s)
|
||||
{
|
||||
return detail::invoke_impl<
|
||||
typename boost::remove_reference<Function>::type,Sequence
|
||||
>::call(f,s);
|
||||
}
|
||||
|
||||
template <typename Function, class Sequence>
|
||||
inline typename result_of::invoke<Function,Sequence const>::type
|
||||
invoke(Function f, Sequence const & s)
|
||||
{
|
||||
return detail::invoke_impl<
|
||||
typename boost::remove_reference<Function>::type,Sequence const
|
||||
>::call(f,s);
|
||||
}
|
||||
|
||||
}}
|
||||
|
||||
#define BOOST_FUSION_FUNCTIONAL_INVOCATION_INVOKE_HPP_INCLUDED
|
||||
#else // defined(BOOST_PP_IS_ITERATING)
|
||||
///////////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// Preprocessor vertical repetition code
|
||||
//
|
||||
///////////////////////////////////////////////////////////////////////////////
|
||||
#define N BOOST_PP_ITERATION()
|
||||
|
||||
template <typename Function, class Sequence>
|
||||
struct invoke_impl<Function,Sequence,N,false,true>
|
||||
{
|
||||
public:
|
||||
|
||||
typedef typename boost::result_of<
|
||||
#define M(z,j,data) typename result_of::at_c<Sequence,j>::type
|
||||
Function(BOOST_PP_ENUM(N,M,~)) >::type result_type;
|
||||
#undef M
|
||||
|
||||
template <typename F>
|
||||
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,~) );
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
#if N > 0
|
||||
template <typename Function, class Sequence>
|
||||
struct invoke_mem_fn<Function,Sequence,N,true>
|
||||
{
|
||||
public:
|
||||
|
||||
typedef typename ft::result_type<Function>::type result_type;
|
||||
|
||||
template <typename F>
|
||||
static inline result_type
|
||||
call(F & f, Sequence & s)
|
||||
{
|
||||
return (that_ptr<typename mpl::front<
|
||||
ft::parameter_types<Function> >::type
|
||||
>::get(fusion::at_c<0>(s))->*f)(BOOST_PP_ENUM_SHIFTED(N,M,~));
|
||||
}
|
||||
};
|
||||
#endif
|
||||
|
||||
#undef M
|
||||
|
||||
#define M(z,j,data) \
|
||||
typename seq::I##j i##j = \
|
||||
fusion::next(BOOST_PP_CAT(i,BOOST_PP_DEC(j)));
|
||||
|
||||
template <typename Function, class Sequence>
|
||||
struct invoke_impl<Function,Sequence,N,false,false>
|
||||
{
|
||||
private:
|
||||
typedef invoke_param_types<Sequence,N> seq;
|
||||
public:
|
||||
|
||||
typedef typename boost::result_of<
|
||||
Function(BOOST_PP_ENUM_PARAMS(N,typename seq::T))
|
||||
>::type result_type;
|
||||
|
||||
template <typename F>
|
||||
static inline result_type
|
||||
call(F & f, Sequence & s)
|
||||
{
|
||||
#if N > 0
|
||||
typename seq::I0 i0 = fusion::begin(s);
|
||||
BOOST_PP_REPEAT_FROM_TO(1,N,M,~)
|
||||
#endif
|
||||
return f( BOOST_PP_ENUM_PARAMS(N,*i) );
|
||||
}
|
||||
};
|
||||
|
||||
#if N > 0
|
||||
template <typename Function, class Sequence>
|
||||
struct invoke_mem_fn<Function,Sequence,N,false>
|
||||
{
|
||||
private:
|
||||
typedef invoke_param_types<Sequence,N> seq;
|
||||
public:
|
||||
|
||||
typedef typename ft::result_type<Function>::type result_type;
|
||||
|
||||
template <typename F>
|
||||
static inline result_type
|
||||
call(F & f, Sequence & s)
|
||||
{
|
||||
typename seq::I0 i0 = fusion::begin(s);
|
||||
BOOST_PP_REPEAT_FROM_TO(1,N,M,~)
|
||||
|
||||
return (that_ptr< typename mpl::front<
|
||||
ft::parameter_types<Function> >::type
|
||||
>::get(*i0)->*f)(BOOST_PP_ENUM_SHIFTED_PARAMS(N,*i));
|
||||
}
|
||||
};
|
||||
#endif
|
||||
|
||||
#undef M
|
||||
|
||||
template <class Sequence> struct invoke_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
|
||||
|
||||
Reference in New Issue
Block a user