//remove_reference.h #ifndef _REMOVE_REFERENCE_H_
#define _REMOVE_REFERENCE_H_
namespace boost {
namespace type_traits {
template <
class T>
struct wrap {};
typedef
char yes_type;
struct no_type
{
char padding[8];
};
}
// namespace boost::type_traits namespace detail {
using ::boost::type_traits::yes_type;
using ::boost::type_traits::no_type;
using ::boost::type_traits::wrap;
#define BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(trait,sp,C) \
template<>
struct trait##_impl< sp > \
{ \
enum {value = (C)}; \
};
template <
class T> T&(* is_reference_helper1(wrap<T>) )(wrap<T>);
char is_reference_helper1(...);
template <
class T> no_type is_reference_helper2(T&(*)(wrap<T>));
yes_type is_reference_helper2(...);
template <typename T>
struct is_reference_impl
{
enum{
value =
sizeof(
::boost::detail::is_reference_helper2(
::boost::detail::is_reference_helper1(::boost::type_traits::wrap<T>()))) == 1
};
// BOOST_STATIC_CONSTANT( // bool, value = sizeof( // ::boost::detail::is_reference_helper2( // ::boost::detail::is_reference_helper1(::boost::type_traits::wrap<T>()))) == 1 // ); };
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_reference,
void,
false)
// VC6用这一个就可以了,void const等也解决了 // #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS // BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_reference,void const,false) // BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_reference,void volatile,false) // BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_reference,void const volatile,false) // #endif }
// namespace detail template <typename T>
struct is_reference
{
enum{
value = detail::is_reference_impl<T>::value
};
};
namespace detail {
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;
};
};
template<
bool IsReference>
struct remove_reference_impl_typeof {
template<typename T,typename ID>
struct inner {
typedef T type;
};
};
template<>
struct remove_reference_impl_typeof<
true> {
template<typename T,typename ID>
struct inner {
template<typename U>
static msvc_register_type<U,ID> test(U&(*)());
static msvc_register_type<T,ID> test(...);
//BOOST_STATIC_CONSTANT(unsigned,register_test=sizeof(test( (T(*)())(NULL) ) )); enum {register_test=
sizeof(test( (T(*)())(NULL) ) )};
typedef typename msvc_extract_type<ID>::id2type::type type;
};
};
}
//namespace detail template<typename T>
struct remove_reference {
typedef typename detail::remove_reference_impl_typeof<
boost::is_reference<T>::value
>::template inner<T,remove_reference<T> >::type type;
//BOOST_MPL_AUX_LAMBDA_SUPPORT(1,remove_reference,T) };
}
#endif