187 lines
7.3 KiB
Plaintext
187 lines
7.3 KiB
Plaintext
// Copyright (C) 2004, 2005 Arkadiy Vertleyb
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// Copyright (C) 2005 Peder Holt
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_TYPEOF_TYPEOF_IMPL_HPP_INCLUDED
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#define BOOST_TYPEOF_TYPEOF_IMPL_HPP_INCLUDED
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#include <boost/mpl/size_t.hpp>
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#include <boost/preprocessor/repetition/enum.hpp>
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#include <boost/typeof/encode_decode.hpp>
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#include <boost/typeof/vector.hpp>
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#include <boost/type_traits/is_function.hpp>
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#include <boost/utility/enable_if.hpp>
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#define BOOST_TYPEOF_VECTOR(n) BOOST_PP_CAT(boost::type_of::vector, n)
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#define BOOST_TYPEOF_sizer_item(z, n, _)\
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char item ## n[V::item ## n ::value];
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namespace boost { namespace type_of {
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template<class V>
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struct sizer
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{
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// char item0[V::item0::value];
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// char item1[V::item1::value];
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// ...
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BOOST_PP_REPEAT(BOOST_TYPEOF_LIMIT_SIZE, BOOST_TYPEOF_sizer_item, ~)
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};
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}}
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#undef BOOST_TYPEOF_sizer_item
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//
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namespace boost { namespace type_of {
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# ifdef BOOST_NO_SFINAE
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template<class V, class T>
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sizer<typename encode_type<V, T>::type> encode(const T&);
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# else
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template<class V, class T>
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typename enable_if<
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typename is_function<T>::type,
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sizer<typename encode_type<V, T>::type> >::type encode(T&);
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template<class V, class T>
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typename disable_if<
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typename is_function<T>::type,
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sizer<typename encode_type<V, T>::type> >::type encode(const T&);
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# endif
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}}
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//
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namespace boost { namespace type_of {
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template<class V>
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struct decode_begin
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{
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typedef typename decode_type<typename V::begin>::type type;
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};
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}}
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#define BOOST_TYPEOF_TYPEITEM(z, n, expr)\
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boost::mpl::size_t<sizeof(boost::type_of::encode<BOOST_TYPEOF_VECTOR(0)<> >(expr).item ## n)>
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#define BOOST_TYPEOF_ENCODED_VECTOR(Expr) \
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BOOST_TYPEOF_VECTOR(BOOST_TYPEOF_LIMIT_SIZE)< \
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BOOST_PP_ENUM(BOOST_TYPEOF_LIMIT_SIZE, BOOST_TYPEOF_TYPEITEM, Expr) \
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>
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#define BOOST_TYPEOF(Expr)\
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boost::type_of::decode_begin<BOOST_TYPEOF_ENCODED_VECTOR(Expr) >::type
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#define BOOST_TYPEOF_TPL typename BOOST_TYPEOF
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//offset_vector is used to delay the insertion of data into the vector in order to allow
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//encoding to be done in many steps
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namespace boost { namespace type_of {
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template<typename V,typename Offset>
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struct offset_vector {
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};
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template<class V,class Offset,class T>
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struct push_back<boost::type_of::offset_vector<V,Offset>,T> {
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typedef offset_vector<V,typename Offset::prior> type;
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};
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template<class V,class T>
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struct push_back<boost::type_of::offset_vector<V,mpl::size_t<0> >,T> {
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typedef typename push_back<V,T>::type type;
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};
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}}
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#define BOOST_TYPEOF_NESTED_TYPEITEM(z, n, expr)\
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BOOST_STATIC_CONSTANT(int,BOOST_PP_CAT(value,n) = sizeof(boost::type_of::encode<_typeof_start_vector>(expr).item ## n));\
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typedef boost::mpl::size_t<BOOST_PP_CAT(self_t::value,n)> BOOST_PP_CAT(item,n);
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#ifdef __DMC__
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#define BOOST_TYPEOF_NESTED_TYPEITEM_2(z,n,expr)\
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typedef typename _typeof_encode_fraction<iteration>::BOOST_PP_CAT(item,n) BOOST_PP_CAT(item,n);
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#define BOOST_TYPEOF_FRACTIONTYPE()\
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BOOST_PP_REPEAT(BOOST_TYPEOF_LIMIT_SIZE,BOOST_TYPEOF_NESTED_TYPEITEM_2,_)\
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typedef _typeof_fraction_iter<Pos> fraction_type;
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#else
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#define BOOST_TYPEOF_FRACTIONTYPE()\
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typedef _typeof_encode_fraction<self_t::iteration> fraction_type;
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#endif
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#ifdef __BORLANDC__
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namespace boost { namespace type_of {
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template<typename Pos,typename Iter>
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struct generic_typeof_fraction_iter {
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typedef generic_typeof_fraction_iter<Pos,Iter> self_t;
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static const int pos=(Pos::value);
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static const int iteration=(pos/5);
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static const int where=pos%5;
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typedef typename Iter::template _apply_next<self_t::iteration>::type fraction_type;
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typedef generic_typeof_fraction_iter<typename Pos::next,Iter> next;
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typedef typename v_iter<fraction_type,mpl::int_<self_t::where> >::type type;
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};
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}}
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#define BOOST_TYPEOF_NESTED_TYPEDEF_IMPL(expr) \
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template<int _Typeof_Iteration>\
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struct _typeof_encode_fraction {\
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typedef _typeof_encode_fraction<_Typeof_Iteration> self_t;\
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BOOST_STATIC_CONSTANT(int,_typeof_encode_offset = (_Typeof_Iteration*BOOST_TYPEOF_LIMIT_SIZE));\
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typedef boost::type_of::offset_vector<BOOST_TYPEOF_VECTOR(0)<>,boost::mpl::size_t<self_t::_typeof_encode_offset> > _typeof_start_vector;\
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BOOST_PP_REPEAT(BOOST_TYPEOF_LIMIT_SIZE,BOOST_TYPEOF_NESTED_TYPEITEM,expr)\
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template<int Next>\
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struct _apply_next {\
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typedef _typeof_encode_fraction<Next> type;\
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};\
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};\
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template<typename Pos>\
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struct _typeof_fraction_iter {\
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typedef boost::type_of::generic_typeof_fraction_iter<Pos,_typeof_encode_fraction<0> > self_t;\
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typedef typename self_t::next next;\
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typedef typename self_t::type type;\
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};
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#else
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#define BOOST_TYPEOF_NESTED_TYPEDEF_IMPL(expr) \
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template<int _Typeof_Iteration>\
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struct _typeof_encode_fraction {\
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typedef _typeof_encode_fraction<_Typeof_Iteration> self_t;\
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BOOST_STATIC_CONSTANT(int,_typeof_encode_offset = (_Typeof_Iteration*BOOST_TYPEOF_LIMIT_SIZE));\
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typedef boost::type_of::offset_vector<BOOST_TYPEOF_VECTOR(0)<>,boost::mpl::size_t<self_t::_typeof_encode_offset> > _typeof_start_vector;\
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BOOST_PP_REPEAT(BOOST_TYPEOF_LIMIT_SIZE,BOOST_TYPEOF_NESTED_TYPEITEM,expr)\
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};\
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template<typename Pos>\
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struct _typeof_fraction_iter {\
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typedef _typeof_fraction_iter<Pos> self_t;\
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BOOST_STATIC_CONSTANT(int,pos=(Pos::value));\
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BOOST_STATIC_CONSTANT(int,iteration=(pos/BOOST_TYPEOF_LIMIT_SIZE));\
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BOOST_STATIC_CONSTANT(int,where=pos%BOOST_TYPEOF_LIMIT_SIZE);\
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BOOST_TYPEOF_FRACTIONTYPE()\
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typedef typename boost::type_of::v_iter<fraction_type,boost::mpl::int_<self_t::where> >::type type;\
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typedef _typeof_fraction_iter<typename Pos::next> next;\
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};
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#endif
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#ifdef __MWERKS__
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# define BOOST_TYPEOF_NESTED_TYPEDEF(name,expr) \
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template<typename T>\
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struct BOOST_PP_CAT(_typeof_template_,name) {\
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BOOST_TYPEOF_NESTED_TYPEDEF_IMPL(expr)\
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typedef typename boost::type_of::decode_type<_typeof_fraction_iter<boost::mpl::size_t<0> > >::type type;\
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};\
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typedef BOOST_PP_CAT(_typeof_template_,name)<int> name;
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# define BOOST_TYPEOF_NESTED_TYPEDEF_TPL(name,expr) BOOST_TYPEOF_NESTED_TYPEDEF(name,expr)
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#else
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# define BOOST_TYPEOF_NESTED_TYPEDEF_TPL(name,expr) \
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struct name {\
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BOOST_TYPEOF_NESTED_TYPEDEF_IMPL(expr)\
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typedef typename boost::type_of::decode_type<_typeof_fraction_iter<boost::mpl::size_t<0> > >::type type;\
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};
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# define BOOST_TYPEOF_NESTED_TYPEDEF(name,expr) \
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struct name {\
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BOOST_TYPEOF_NESTED_TYPEDEF_IMPL(expr)\
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typedef boost::type_of::decode_type<_typeof_fraction_iter<boost::mpl::size_t<0> > >::type type;\
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};
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#endif
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#endif//BOOST_TYPEOF_COMPLIANT_TYPEOF_IMPL_HPP_INCLUDED
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