Function group_axes

src/shape_transform_descriptor.cpp:150–161

// all subdimensions that have that axis.
template <class Dimensions>
static std::map<std::size_t, std::vector<dimension::sub*>> group_axes(Dimensions& dimensions)
{
    using sub =
        std::conditional_t<std::is_const<Dimensions>{}, const dimension::sub, dimension::sub>;
    std::map<std::size_t, std::vector<sub*>> axes_map;
    for_each_subdimension(dimensions, [&](auto& s) {
        if(s.origin_axis().empty())
            return;
        axes_map[s.origin_axis().front()].push_back(&s);
    });
    return axes_map;
}

// Renumber all axes while preserving the order of the axes
static void renumber_axes(std::map<std::size_t, std::vector<dimension::sub*>>& axes_map)