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// Copyright (C) 2004, 2005 Arkadiy Vertleyb
// Copyright (C) 2005 Peder Holt
// 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)
#ifndef BOOST_TYPEOF_TYPEOF_IMPL_HPP_INCLUDED
#define BOOST_TYPEOF_TYPEOF_IMPL_HPP_INCLUDED
#include <boost/mpl/size_t.hpp>
#include <boost/preprocessor/repetition/enum.hpp>
#include <boost/typeof/encode_decode.hpp>
#include <boost/typeof/vector.hpp>
#include <boost/type_traits/is_function.hpp>
#include <boost/utility/enable_if.hpp>
#define BOOST_TYPEOF_VECTOR(n) BOOST_PP_CAT(boost::type_of::vector, n)
#define BOOST_TYPEOF_sizer_item(z, n, _)\
char item ## n[V::item ## n ::value];
namespace boost { namespace type_of {
template<class V>
struct sizer
{
// char item0[V::item0::value];
// char item1[V::item1::value];
// ...
BOOST_PP_REPEAT(BOOST_TYPEOF_LIMIT_SIZE, BOOST_TYPEOF_sizer_item, ~)
};
}}
#undef BOOST_TYPEOF_sizer_item
//
namespace boost { namespace type_of {
# ifdef BOOST_NO_SFINAE
template<class V, class T>
sizer<typename encode_type<V, T>::type> encode(const T&);
# else
template<class V, class T>
typename enable_if<
typename is_function<T>::type,
sizer<typename encode_type<V, T>::type> >::type encode(T&);
template<class V, class T>
typename disable_if<
typename is_function<T>::type,
sizer<typename encode_type<V, T>::type> >::type encode(const T&);
# endif
}}
//
namespace boost { namespace type_of {
template<class V>
struct decode_begin
{
typedef typename decode_type<typename V::begin>::type type;
};
}}
#define BOOST_TYPEOF_TYPEITEM(z, n, expr)\
boost::mpl::size_t<sizeof(boost::type_of::encode<BOOST_TYPEOF_VECTOR(0)<> >(expr).item ## n)>
#define BOOST_TYPEOF_ENCODED_VECTOR(Expr) \
BOOST_TYPEOF_VECTOR(BOOST_TYPEOF_LIMIT_SIZE)< \
BOOST_PP_ENUM(BOOST_TYPEOF_LIMIT_SIZE, BOOST_TYPEOF_TYPEITEM, Expr) \
>
#define BOOST_TYPEOF(Expr)\
boost::type_of::decode_begin<BOOST_TYPEOF_ENCODED_VECTOR(Expr) >::type
#define BOOST_TYPEOF_TPL typename BOOST_TYPEOF
//offset_vector is used to delay the insertion of data into the vector in order to allow
//encoding to be done in many steps
namespace boost { namespace type_of {
template<typename V,typename Offset>
struct offset_vector {
};
template<class V,class Offset,class T>
struct push_back<boost::type_of::offset_vector<V,Offset>,T> {
typedef offset_vector<V,typename Offset::prior> type;
};
template<class V,class T>
struct push_back<boost::type_of::offset_vector<V,mpl::size_t<0> >,T> {
typedef typename push_back<V,T>::type type;
};
}}
#define BOOST_TYPEOF_NESTED_TYPEITEM(z, n, expr)\
BOOST_STATIC_CONSTANT(int,BOOST_PP_CAT(value,n) = sizeof(boost::type_of::encode<_typeof_start_vector>(expr).item ## n));\
typedef boost::mpl::size_t<BOOST_PP_CAT(self_t::value,n)> BOOST_PP_CAT(item,n);
#ifdef __DMC__
#define BOOST_TYPEOF_NESTED_TYPEITEM_2(z,n,expr)\
typedef typename _typeof_encode_fraction<iteration>::BOOST_PP_CAT(item,n) BOOST_PP_CAT(item,n);
#define BOOST_TYPEOF_FRACTIONTYPE()\
BOOST_PP_REPEAT(BOOST_TYPEOF_LIMIT_SIZE,BOOST_TYPEOF_NESTED_TYPEITEM_2,_)\
typedef _typeof_fraction_iter<Pos> fraction_type;
#else
#define BOOST_TYPEOF_FRACTIONTYPE()\
typedef _typeof_encode_fraction<self_t::iteration> fraction_type;
#endif
#ifdef __BORLANDC__
namespace boost { namespace type_of {
template<typename Pos,typename Iter>
struct generic_typeof_fraction_iter {
typedef generic_typeof_fraction_iter<Pos,Iter> self_t;
static const int pos=(Pos::value);
static const int iteration=(pos/5);
static const int where=pos%5;
typedef typename Iter::template _apply_next<self_t::iteration>::type fraction_type;
typedef generic_typeof_fraction_iter<typename Pos::next,Iter> next;
typedef typename v_iter<fraction_type,mpl::int_<self_t::where> >::type type;
};
}}
#define BOOST_TYPEOF_NESTED_TYPEDEF_IMPL(expr) \
template<int _Typeof_Iteration>\
struct _typeof_encode_fraction {\
typedef _typeof_encode_fraction<_Typeof_Iteration> self_t;\
BOOST_STATIC_CONSTANT(int,_typeof_encode_offset = (_Typeof_Iteration*BOOST_TYPEOF_LIMIT_SIZE));\
typedef boost::type_of::offset_vector<BOOST_TYPEOF_VECTOR(0)<>,boost::mpl::size_t<self_t::_typeof_encode_offset> > _typeof_start_vector;\
BOOST_PP_REPEAT(BOOST_TYPEOF_LIMIT_SIZE,BOOST_TYPEOF_NESTED_TYPEITEM,expr)\
template<int Next>\
struct _apply_next {\
typedef _typeof_encode_fraction<Next> type;\
};\
};\
template<typename Pos>\
struct _typeof_fraction_iter {\
typedef boost::type_of::generic_typeof_fraction_iter<Pos,_typeof_encode_fraction<0> > self_t;\
typedef typename self_t::next next;\
typedef typename self_t::type type;\
};
#else
#define BOOST_TYPEOF_NESTED_TYPEDEF_IMPL(expr) \
template<int _Typeof_Iteration>\
struct _typeof_encode_fraction {\
typedef _typeof_encode_fraction<_Typeof_Iteration> self_t;\
BOOST_STATIC_CONSTANT(int,_typeof_encode_offset = (_Typeof_Iteration*BOOST_TYPEOF_LIMIT_SIZE));\
typedef boost::type_of::offset_vector<BOOST_TYPEOF_VECTOR(0)<>,boost::mpl::size_t<self_t::_typeof_encode_offset> > _typeof_start_vector;\
BOOST_PP_REPEAT(BOOST_TYPEOF_LIMIT_SIZE,BOOST_TYPEOF_NESTED_TYPEITEM,expr)\
};\
template<typename Pos>\
struct _typeof_fraction_iter {\
typedef _typeof_fraction_iter<Pos> self_t;\
BOOST_STATIC_CONSTANT(int,pos=(Pos::value));\
BOOST_STATIC_CONSTANT(int,iteration=(pos/BOOST_TYPEOF_LIMIT_SIZE));\
BOOST_STATIC_CONSTANT(int,where=pos%BOOST_TYPEOF_LIMIT_SIZE);\
BOOST_TYPEOF_FRACTIONTYPE()\
typedef typename boost::type_of::v_iter<fraction_type,boost::mpl::int_<self_t::where> >::type type;\
typedef _typeof_fraction_iter<typename Pos::next> next;\
};
#endif
#ifdef __MWERKS__
# define BOOST_TYPEOF_NESTED_TYPEDEF(name,expr) \
template<typename T>\
struct BOOST_PP_CAT(_typeof_template_,name) {\
BOOST_TYPEOF_NESTED_TYPEDEF_IMPL(expr)\
typedef typename boost::type_of::decode_type<_typeof_fraction_iter<boost::mpl::size_t<0> > >::type type;\
};\
typedef BOOST_PP_CAT(_typeof_template_,name)<int> name;
# define BOOST_TYPEOF_NESTED_TYPEDEF_TPL(name,expr) BOOST_TYPEOF_NESTED_TYPEDEF(name,expr)
#else
# define BOOST_TYPEOF_NESTED_TYPEDEF_TPL(name,expr) \
struct name {\
BOOST_TYPEOF_NESTED_TYPEDEF_IMPL(expr)\
typedef typename boost::type_of::decode_type<_typeof_fraction_iter<boost::mpl::size_t<0> > >::type type;\
};
# define BOOST_TYPEOF_NESTED_TYPEDEF(name,expr) \
struct name {\
BOOST_TYPEOF_NESTED_TYPEDEF_IMPL(expr)\
typedef boost::type_of::decode_type<_typeof_fraction_iter<boost::mpl::size_t<0> > >::type type;\
};
#endif
#endif//BOOST_TYPEOF_COMPLIANT_TYPEOF_IMPL_HPP_INCLUDED
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