Function remove_split_hidden_axes

src/shape_transform_descriptor.cpp:1097–1122

If an axis is split and some dimensions are hidden and others are not, then remove the hidden axis so only the non-hidden axis is used in simplificaiton

// remove the hidden axis so only the non-hidden axis is used in
// simplificaiton
static void remove_split_hidden_axes(std::map<std::size_t, std::vector<dimension::sub*>>& axes_map)
{
    for(auto&& p : axes_map)
    {
        auto& subs = p.second;
        if(std::all_of(subs.begin(), subs.end(), [](const dimension::sub* s) {
               return s->has_hidden_axis();
           }))
            continue;
        for(auto* sub : subs)
        {
            if(not sub->has_hidden_axis())
                continue;
            sub->hidden_axis.clear();
        }
        // Remove the subdimesions that no longer have an axis
        subs.erase(std::remove_if(subs.begin(),
                                  subs.end(),
                                  [](const dimension::sub* s) {
                                      return s->axis.empty() and s->hidden_axis.empty();
                                  }),
                   subs.end());
    }
    // Remove axis from group if empty
    erase_if(axes_map, [](auto&& p) { return p.second.empty(); });
}

// Replace the hidden axis that is split with an axis that is missing
static void fill_split_hidden_axes(std::map<std::size_t, std::vector<dimension::sub*>>& axes_map,