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#if !defined(_TYPE_TRAITS)
#define _TYPE_TRAITS
namespace std
{
/// integral_constant
template<typename _Tp, _Tp __v>
struct integral_constant
{
static const _Tp value = __v;
typedef _Tp value_type;
typedef integral_constant<_Tp, __v> type;
};
/// typedef for true_type
typedef integral_constant<bool, true> true_type;
/// typedef for false_type
typedef integral_constant<bool, false> false_type;
template<typename _Tp, _Tp __v>
const _Tp integral_constant<_Tp, __v>::value;
/// remove_const
template<typename _Tp>
struct remove_const
{ typedef _Tp type; };
/// remove_volatile
template<typename _Tp>
struct remove_volatile
{ typedef _Tp type; };
/// remove_cv
template<typename _Tp>
struct remove_cv
{
typedef typename
remove_const<typename remove_volatile<_Tp>::type>::type type;
};
template<typename> struct _is_integral_type : public false_type { };
template<> struct _is_integral_type<bool>: public integral_constant<bool,true> {};
template<> struct _is_integral_type<char>: public integral_constant<bool,true> {};
template<> struct _is_integral_type<signed char>: public integral_constant<bool,true> {};
template<> struct _is_integral_type<unsigned char>: public integral_constant<bool,true> {};
template<> struct _is_integral_type<short>: public integral_constant<bool,true> {};
template<> struct _is_integral_type<unsigned short>: public integral_constant<bool,true> {};
template<> struct _is_integral_type<int>: public integral_constant<bool,true> {};
template<> struct _is_integral_type<unsigned int>: public integral_constant<bool,true> {};
template<> struct _is_integral_type<long>: public integral_constant<bool,true> {};
template<> struct _is_integral_type<unsigned long>: public integral_constant<bool,true> {};
template<> struct _is_integral_type<long long>: public integral_constant<bool,true> {};
template<> struct _is_integral_type<unsigned long long>: public integral_constant<bool,true> {};
/// is_integral
template<typename _Tp>
struct is_integral
: public integral_constant<bool, (_is_integral_type<typename
remove_cv<_Tp>::type>::value)>
{ };
/// is_same
template<typename, typename>
struct is_same
: public false_type { };
template<typename _Tp>
struct is_same<_Tp, _Tp>
: public true_type { };
template<typename>
struct __is_pointer_helper
: public false_type { };
template<typename _Tp>
struct __is_pointer_helper<_Tp*>
: public true_type { };
/// is_pointer
template<typename _Tp>
struct is_pointer
: public integral_constant<bool, (__is_pointer_helper<typename
remove_cv<_Tp>::type>::value)>
{ };
}
#endif
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