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typetraits.h
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typetraits.h
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#ifndef _TYPE_TRAITS_H_
#define _TYPE_TRAITS_H_
namespace EasySTL {
struct _true_type { };
struct _false_type { };
/*
** 萃取传入的T类型的类型特性
*/
template<class T>
struct _type_traits
{
typedef _false_type has_trivial_default_constructor;
typedef _false_type has_trivial_copy_constructor;
typedef _false_type has_trivial_assignment_operator;
typedef _false_type has_trivial_destructor;
typedef _false_type is_POD_type;
};
template<>
struct _type_traits<bool>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<char>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<unsigned char>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<signed char>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<wchar_t>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<short>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<unsigned short>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<int>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<unsigned int>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<long>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<unsigned long>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<long long>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<unsigned long long>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<float>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<double>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<long double>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
//指针是POD类型
template<class T>
struct _type_traits<T*>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<class T>
struct _type_traits<const T*>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<char*>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<unsigned char*>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<signed char*>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<const char*>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<const unsigned char*>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
template<>
struct _type_traits<const signed char*>
{
typedef _true_type has_trivial_default_constructor;
typedef _true_type has_trivial_copy_constructor;
typedef _true_type has_trivial_assignment_operator;
typedef _true_type has_trivial_destructor;
typedef _true_type is_POD_type;
};
}
#endif