Constness problem with particle interface
Check Constness for particle interface (iterator and proxy) and and write a unit test.
The following code does not compile (leaf is a leaf_view (see check_l2p.cpp)) for(auto p_tuple_ref: leaf) { auto proxy = typename group_tree_type::leaf_type::proxy_type(p_tuple_ref); std::cout << idx << " p " << proxy << std::endl; }