boost::gil::PixelConcept

template<typename P>
struct PixelConcept;

concept PixelConcept<typename P> : ColorBaseConcept<P>, PixelBasedConcept<P>
{
    where is_pixel<P>::value == true;
    // where for each K [0..size<P>::value - 1]:
    //      ChannelConcept<kth_element_type<P, K>>;

    typename P::value_type;
        where PixelValueConcept<value_type>;
    typename P::reference;
        where PixelConcept<reference>;
    typename P::const_reference;
        where PixelConcept<const_reference>;
    static const bool P::is_mutable;

    template <PixelConcept P2> where { PixelConcept<P, P2> }
        P::P(P2);
    template <PixelConcept P2> where { PixelConcept<P, P2> }
        bool operator==(const P&, const P2&);
    template <PixelConcept P2> where { PixelConcept<P, P2> }
        bool operator!=(const P&, const P2&);
};