Class lsst::afw::math::infinite_iterator

template<typename ValueT>
class infinite_iterator : public boost::iterator_adaptor<infinite_iterator<ValueT>, const ValueT *, const ValueT, boost::forward_traversal_tag>

This iterator will never increment. It is returned by row_begin() in the MaskImposter class (below) to allow phony mask pixels to be iterated over for non-mask images within Statistics.