tag_hash.h

// Description: Retrieves the hash from a tag.

#ifndef PASTELSYS_TAG_HASH_H
#define PASTELSYS_TAG_HASH_H

#include "pastel/sys/generic/tag.h"

#include <type_traits>

namespace Pastel
{

    namespace Tag_Hash_
    {

        template <typename Type>
        struct Tag_Hash__
        {
            enum : int
            {
                value = 0
            };
        };

        template <tag_integer Hash>
        struct Tag_Hash__<Tag<Hash>>
        {
            enum : tag_integer
            {
                value = Hash
            };
        };

    }

    template <typename Type>
    using Tag_Hash = 
        Tag_Hash_::Tag_Hash__<
            std::remove_cv_t<
                std::remove_reference_t<Type>
            >
        >;

}

#endif