boost::gil::memunit_advanced_ref

template<typename NonAlignedPixelReference>
NonAlignedPixelReference
memunit_advanced_ref(
    bit_aligned_pixel_iterator<NonAlignedPixelReference> it,
    std::ptrdiff_t diff);

template<typename Iterator>
std::iterator_traits<Iterator>::reference
memunit_advanced_ref(
    memory_based_step_iterator<Iterator> const& p,
    std::ptrdiff_t diff);

template<typename P>
P&
memunit_advanced_ref(
    P* p,
    std::ptrdiff_t diff);

template<
    typename Iterator,
    typename DFn>
std::iterator_traits<dereference_iterator_adaptor<Iterator, DFn>>::reference
memunit_advanced_ref(
    dereference_iterator_adaptor<Iterator, DFn> const& p,
    std::iterator_traits<Iterator>::difference_type diff);

template<
    typename ChannelPtr,
    typename ColorSpace>
planar_pixel_reference<std::iterator_traits<ChannelPtr>::reference, ColorSpace>
memunit_advanced_ref(
    planar_pixel_iterator<ChannelPtr, ColorSpace> const& ptr,
    std::ptrdiff_t diff);