Function gfor

test/morph.cpp:464–464

    array mask = randu(3, 3) > 0.3;

    gfor(seq ii, 3) { B(span, span, ii) = erode(A(span, span, ii), mask); }

    for (int ii = 0; ii < 3; ii++) {
        array c_ii = erode(A(span, span, ii), mask);