rubber/meta_object.hpp

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#ifndef RUBBER_META_OBJECT_1103151301_HPP
#define RUBBER_META_OBJECT_1103151301_HPP

#include <rubber/config.hpp>
#include <rubber/meta_meta_object.hpp>
#include <mirror/meta_object_tags.hpp>

RUBBER_NAMESPACE_BEGIN


class meta_object
{
private:
    int _uid;
    aux::return_value<meta_meta_object>::type (*_get_self)(void);
public:
    template <typename MetaObject>
    meta_object(MetaObject mo)
     : _uid(aux::meta_object_uid(mo))
     , _get_self(
        &wrap_shaped<
            MIRRORED_META_OBJECT(MetaObject),
            meta_meta_object
        >
    )
    { }

#if RUBBER_POLYMORPHIC_META_OBJECT
    virtual ~meta_object(void)
    { }
#endif

    inline int uid(void) const
    {
        return _uid;
    }

    friend bool operator == (const meta_object& a, const meta_object& b)
    {
        return a.uid() == b.uid();
    }

    friend bool operator != (const meta_object& a, const meta_object& b)
    {
        return a.uid() != b.uid();
    }

    friend bool operator <= (const meta_object& a, const meta_object& b)
    {
        return a.uid() <= b.uid();
    }

    friend bool operator >= (const meta_object& a, const meta_object& b)
    {
        return a.uid() >= b.uid();
    }

    friend bool operator <  (const meta_object& a, const meta_object& b)
    {
        return a.uid() <  b.uid();
    }

    friend bool operator >  (const meta_object& a, const meta_object& b)
    {
        return a.uid() >  b.uid();
    }

    aux::return_value<meta_meta_object>::type self(void) const
    {
        assert(_get_self != nullptr);
        return _get_self();
    }

    puddle::meta_object_category category(void) const
    {
        return self().category();
    }

    #ifdef MIRROR_DOCUMENTATION_ONLY


    bool is_X(void) const;
    #endif
#define RUBBER_HELPER_MAKE_MO_IS_X(OBJECT, I, X) \
    inline bool is_## OBJECT(void) const \
    { \
        return self().is_meta_## OBJECT(); \
    }
MIRROR_FOR_EACH_META_OBJECT(RUBBER_HELPER_MAKE_MO_IS_X, _)
#undef RUBBER_HELPER_MAKE_MO_IS_X

#ifdef MIRROR_DOCUMENTATION_ONLY


    template <typename TypeErased>
    const TypeErased& as(void) const
#endif
#if RUBBER_POLYMORPHIC_META_OBJECT
    template <typename TypeErased>
    const TypeErased& as(void) const
    {
        return dynamic_cast<const TypeErased&>(*this);
    }
#endif
};

RUBBER_NAMESPACE_END

#endif //include guard