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#ifndef SDLT_UNIFORM_CONST_SCALAR_MEMBER_H
#define SDLT_UNIFORM_CONST_SCALAR_MEMBER_H


#include "../../common.h"
#include "../../primitive.h"
#include "../deferred.h"
#include "../enable_if_type.h"
#include "../unqualified.h"
#include "../rvalue_operator_helper.h"

namespace sdlt {
namespace __SDLT_IMPL {
namespace internal {
namespace uniform {

__SDLT_INHERIT_IMPL_BEGIN

template<
    typename RootScalarDataT,
    typename MemberAccessT,
    typename MemberDataT>
class const_scalar_member
: public sdlt::primitive<MemberDataT>::template const_scalar_uniform_interface<const_scalar_member<RootScalarDataT, MemberAccessT, MemberDataT>,
                                                               RootScalarDataT,
                                                               MemberAccessT,
                                                               const_scalar_member>
{
public:
    typedef MemberDataT value_type;

    template <typename DataProviderT>
    explicit const_scalar_member(const DataProviderT & data_provider)
    : m_root_scalar_data(data_provider.root_scalar_data())
    {}

    // MUST PROVIDE USER DEFINED COPY CONSTRUCTOR
    // with individual member assignment to allow compiler
    // to track them through a SIMD loop
    const_scalar_member(const const_scalar_member & other)
    : m_root_scalar_data(other.m_root_scalar_data)
    {}

    // NOTE: "const value_type" prevents rvalue assignment for structs,
    // better protection that nothing
    SDLT_INLINE
    operator value_type const () const {
        SDLT_INLINE_BLOCK
        {
            return MemberAccessT::const_access(m_root_scalar_data);
        }
    }

    // By including pass_through_rvalue_operators_xmacro,
    // operators for rvalue based relational, arithmetic, logic, and bitwise operators are generated
    #define __SDLT_XMACRO_SELF const_scalar_member
    #include "../../internal/pass_through_rvalue_operators_xmacro.h"

protected:
    template<typename>
    friend class sdlt::primitive;

    template<typename, typename, typename>
    friend class uniform::const_scalar_member;

    const RootScalarDataT & root_scalar_data() const { return m_root_scalar_data; }

    const RootScalarDataT & m_root_scalar_data;
};


__SDLT_INHERIT_IMPL_END

} // namespace uniform
} // namespace internal
} // namespace __SDLT_IMPL
} // namespace sdlt

#endif // SDLT_UNIFORM_CONST_SCALAR_MEMBER_H
