get_hash_code.h

 
#pragma once
 
#include <system/object.h>
#include <system/shared_ptr.h>
#include <system/details/hash_function.h>
 
#include <functional>
#include <type_traits>
#include <thread>
 
namespace System {
 
template<typename T>
typename std::enable_if<std::is_scalar<T>::value, int>::type
GetHashCode(const T& obj)
{
    return static_cast<int>(System::Details::Hash_Meiyan(reinterpret_cast<const char*>(&obj), sizeof(obj)));
}
 
template<typename T>
typename std::enable_if<!std::is_scalar<T>::value && System::IsSmartPtr<T>::value, int>::type
GetHashCode(const T& obj)
{
    return obj->GetHashCode();
}
 
template<typename T>
typename std::enable_if<System::IsExceptionWrapper<T>::value, int>::type
GetHashCode(const T& obj)
{
    return obj->GetHashCode();
}
 
template<typename T>
typename std::enable_if<!std::is_scalar<T>::value && !System::IsSmartPtr<T>::value && !System::IsExceptionWrapper<T>::value, int>::type
GetHashCode(const T& obj)
{
    return obj.GetHashCode();
}
 
template<>
inline int
GetHashCode(const std::thread::id& id)
{
    std::hash<std::thread::id> hash;
    return ASPOSECPP_CHECKED_CAST(int, hash(id));
}
 
} // namespace System