accumulator += 0, which fails without the overload
I want to update the histogram to new bounds, same as
algorithm::shrink, but for both shrinking and growing.
auto hist = make_histogram_with(std::vector<size_t>(), axis::regular(5, 0, 10)); // new histogram with bounds [4, 14): auto hist2 = algorithm::reduce(hist, algorithm::shrinkOrExpand(4, 13));
What is the best way to do this?