Class lsst::afw::geom::SpanPixelIterator

class SpanPixelIterator : public boost::iterator_facade<SpanPixelIterator, lsst::geom::Point2I const, boost::random_access_traversal_tag>

An iterator that yields lsst::geom::Point2I and increases in the x direction.

This is used to iterate over the pixels in a Span, and by extension to iterate over regions like boxes and ellipses.