--- /dev/null
+
+// Copyright (C) 2005 Igor Chesnokov, mailto:ichesnokov@gmail.com (VC 6.5,VC 7.1 + counter code)
+// Copyright (C) 2005-2007 Peder Holt (VC 7.0 + framework)
+// Copyright (C) 2006 Steven Watanabe (VC 8.0)
+
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_TYPEOF_MSVC_TYPEOF_IMPL_HPP_INCLUDED
+# define BOOST_TYPEOF_MSVC_TYPEOF_IMPL_HPP_INCLUDED
+
+# include <boost/config.hpp>
+# include <boost/detail/workaround.hpp>
+# include <boost/mpl/int.hpp>
+# include <boost/type_traits/is_function.hpp>
+# include <boost/utility/enable_if.hpp>
+
+# if BOOST_WORKAROUND(BOOST_MSVC,>=1310)
+# include <typeinfo>
+# endif
+
+namespace boost
+{
+ namespace type_of
+ {
+
+ //Compile time constant code
+# if BOOST_WORKAROUND(BOOST_MSVC,>=1300) && defined(_MSC_EXTENSIONS)
+ template<int N> struct the_counter;
+
+ template<typename T,int N = 5/*for similarity*/>
+ struct encode_counter
+ {
+ __if_exists(the_counter<N + 256>)
+ {
+ BOOST_STATIC_CONSTANT(unsigned,count=(encode_counter<T,N + 257>::count));
+ }
+ __if_not_exists(the_counter<N + 256>)
+ {
+ __if_exists(the_counter<N + 64>)
+ {
+ BOOST_STATIC_CONSTANT(unsigned,count=(encode_counter<T,N + 65>::count));
+ }
+ __if_not_exists(the_counter<N + 64>)
+ {
+ __if_exists(the_counter<N + 16>)
+ {
+ BOOST_STATIC_CONSTANT(unsigned,count=(encode_counter<T,N + 17>::count));
+ }
+ __if_not_exists(the_counter<N + 16>)
+ {
+ __if_exists(the_counter<N + 4>)
+ {
+ BOOST_STATIC_CONSTANT(unsigned,count=(encode_counter<T,N + 5>::count));
+ }
+ __if_not_exists(the_counter<N + 4>)
+ {
+ __if_exists(the_counter<N>)
+ {
+ BOOST_STATIC_CONSTANT(unsigned,count=(encode_counter<T,N + 1>::count));
+ }
+ __if_not_exists(the_counter<N>)
+ {
+ BOOST_STATIC_CONSTANT(unsigned,count=N);
+ typedef the_counter<N> type;
+ }
+ }
+ }
+ }
+ }
+ };
+
+# define BOOST_TYPEOF_INDEX(T) (encode_counter<T>::count)
+# define BOOST_TYPEOF_NEXT_INDEX(next)
+# else
+ template<int N> struct encode_counter : encode_counter<N - 1> {};
+ template<> struct encode_counter<0> {};
+
+ //Need to default to a larger value than 4, as due to MSVC's ETI errors. (sizeof(int)==4)
+ char (*encode_index(...))[5];
+
+# define BOOST_TYPEOF_INDEX(T) (sizeof(*boost::type_of::encode_index((boost::type_of::encode_counter<1005>*)0)))
+# define BOOST_TYPEOF_NEXT_INDEX(next) friend char (*encode_index(encode_counter<next>*))[next];
+# endif
+
+ //Typeof code
+
+# if BOOST_WORKAROUND(BOOST_MSVC,==1300)
+ template<typename ID>
+ struct msvc_extract_type
+ {
+ template<bool>
+ struct id2type_impl;
+
+ typedef id2type_impl<true> id2type;
+ };
+
+ template<typename T, typename ID>
+ struct msvc_register_type : msvc_extract_type<ID>
+ {
+ template<>
+ struct id2type_impl<true> //VC7.0 specific bugfeature
+ {
+ typedef T type;
+ };
+ };
+#elif BOOST_WORKAROUND(BOOST_MSVC,>=1400)
+ struct msvc_extract_type_default_param {};
+
+ template<typename ID, typename T = msvc_extract_type_default_param>
+ struct msvc_extract_type;
+
+ template<typename ID>
+ struct msvc_extract_type<ID, msvc_extract_type_default_param> {
+ template<bool>
+ struct id2type_impl;
+
+ typedef id2type_impl<true> id2type;
+ };
+
+ template<typename ID, typename T>
+ struct msvc_extract_type : msvc_extract_type<ID,msvc_extract_type_default_param>
+ {
+ template<>
+ struct id2type_impl<true> //VC8.0 specific bugfeature
+ {
+ typedef T type;
+ };
+ template<bool>
+ struct id2type_impl;
+
+ typedef id2type_impl<true> id2type;
+ };
+
+ template<typename T, typename ID>
+ struct msvc_register_type : msvc_extract_type<ID, T>
+ {
+ };
+# else
+ template<typename ID>
+ struct msvc_extract_type
+ {
+ struct id2type;
+ };
+
+ template<typename T, typename ID>
+ struct msvc_register_type : msvc_extract_type<ID>
+ {
+ typedef msvc_extract_type<ID> base_type;
+ struct base_type::id2type // This uses nice VC6.5 and VC7.1 bugfeature
+ {
+ typedef T type;
+ };
+ };
+# endif
+// EAN: preprocess this block out on advice of Peder Holt
+// to eliminate errors in type_traits/common_type.hpp
+# if 0 //BOOST_WORKAROUND(BOOST_MSVC,==1310)
+ template<const std::type_info& ref_type_info>
+ struct msvc_typeid_wrapper {
+ typedef typename msvc_extract_type<msvc_typeid_wrapper>::id2type id2type;
+ typedef typename id2type::type wrapped_type;
+ typedef typename wrapped_type::type type;
+ };
+ //This class is used for registering the type T. encode_type<T> is mapped against typeid(encode_type<T>).
+ //msvc_typeid_wrapper<typeid(encode_type<T>)> will now have a type typedef that equals encode_type<T>.
+ template<typename T>
+ struct encode_type
+ {
+ typedef encode_type<T> input_type;
+ //Invoke registration of encode_type<T>. typeid(encode_type<T>) is now mapped to encode_type<T>. Do not use registered_type for anything.
+ //The reason for registering encode_type<T> rather than T, is that VC handles typeid(function reference) poorly. By adding another
+ //level of indirection, we solve this problem.
+ typedef typename msvc_register_type<input_type,msvc_typeid_wrapper<typeid(input_type)> >::id2type registered_type;
+ typedef T type;
+ };
+
+ template<typename T> typename disable_if<
+ typename is_function<T>::type,
+ typename encode_type<T>::input_type>::type encode_start(T const&);
+
+ template<typename T> typename enable_if<
+ typename is_function<T>::type,
+ typename encode_type<T>::input_type>::type encode_start(T&);
+
+ template<typename Organizer, typename T>
+ msvc_register_type<T,Organizer> typeof_register_type(const T&);
+
+
+# define BOOST_TYPEOF(expr) \
+ boost::type_of::msvc_typeid_wrapper<typeid(boost::type_of::encode_start(expr))>::type
+
+# define BOOST_TYPEOF_TPL(expr) typename BOOST_TYPEOF(expr)
+
+# define BOOST_TYPEOF_NESTED_TYPEDEF_TPL(name,expr) \
+struct name {\
+ enum {_typeof_register_value=sizeof(typeid(boost::type_of::typeof_register_type<name>(expr)))};\
+ typedef typename boost::type_of::msvc_extract_type<name>::id2type id2type;\
+ typedef typename id2type::type type;\
+};
+
+# define BOOST_TYPEOF_NESTED_TYPEDEF(name,expr) \
+struct name {\
+ enum {_typeof_register_value=sizeof(typeid(boost::type_of::typeof_register_type<name>(expr)))};\
+ typedef boost::type_of::msvc_extract_type<name>::id2type id2type;\
+ typedef id2type::type type;\
+};
+
+# else
+ template<int ID>
+ struct msvc_typeid_wrapper {
+ typedef typename msvc_extract_type<mpl::int_<ID> >::id2type id2type;
+ typedef typename id2type::type type;
+ };
+ //Workaround for ETI-bug for VC6 and VC7
+ template<>
+ struct msvc_typeid_wrapper<1> {
+ typedef msvc_typeid_wrapper<1> type;
+ };
+ //Workaround for ETI-bug for VC7.1
+ template<>
+ struct msvc_typeid_wrapper<4> {
+ typedef msvc_typeid_wrapper<4> type;
+ };
+
+ //Tie it all together
+ template<typename T>
+ struct encode_type
+ {
+ //Get the next available compile time constants index
+ BOOST_STATIC_CONSTANT(unsigned,value=BOOST_TYPEOF_INDEX(T));
+ //Instantiate the template
+ typedef typename msvc_register_type<T,mpl::int_<value> >::id2type type;
+ //Set the next compile time constants index
+ BOOST_STATIC_CONSTANT(unsigned,next=value+1);
+ //Increment the compile time constant (only needed when extensions are not active
+ BOOST_TYPEOF_NEXT_INDEX(next);
+ };
+
+ template<class T>
+ struct sizer
+ {
+ typedef char(*type)[encode_type<T>::value];
+ };
+# if BOOST_WORKAROUND(BOOST_MSVC,>=1310)
+ template<typename T> typename disable_if<
+ typename is_function<T>::type,
+ typename sizer<T>::type>::type encode_start(T const&);
+
+ template<typename T> typename enable_if<
+ typename is_function<T>::type,
+ typename sizer<T>::type>::type encode_start(T&);
+# else
+ template<typename T>
+ typename sizer<T>::type encode_start(T const&);
+# endif
+ template<typename Organizer, typename T>
+ msvc_register_type<T,Organizer> typeof_register_type(const T&,Organizer* =0);
+
+# define BOOST_TYPEOF(expr) \
+ boost::type_of::msvc_typeid_wrapper<sizeof(*boost::type_of::encode_start(expr))>::type
+
+# define BOOST_TYPEOF_TPL(expr) typename BOOST_TYPEOF(expr)
+
+# define BOOST_TYPEOF_NESTED_TYPEDEF_TPL(name,expr) \
+ struct name {\
+ BOOST_STATIC_CONSTANT(int,_typeof_register_value=sizeof(boost::type_of::typeof_register_type<name>(expr)));\
+ typedef typename boost::type_of::msvc_extract_type<name>::id2type id2type;\
+ typedef typename id2type::type type;\
+ };
+
+# define BOOST_TYPEOF_NESTED_TYPEDEF(name,expr) \
+ struct name {\
+ BOOST_STATIC_CONSTANT(int,_typeof_register_value=sizeof(boost::type_of::typeof_register_type<name>(expr)));\
+ typedef boost::type_of::msvc_extract_type<name>::id2type id2type;\
+ typedef id2type::type type;\
+ };
+
+#endif
+ }
+}
+
+#endif//BOOST_TYPEOF_MSVC_TYPEOF_IMPL_HPP_INCLUDED
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