That's cool. Do the C++ containers now contain a pointer to the monotonic_memory_resource, or is there some magic that lets the local calls to push_back, etc.,

That's cool. Do the C++ containers now contain a pointer to the monotonic_memory_resource, or is there some magic that lets the local calls to push_back, etc., know about the allocator in that local scope? When I needed many arena-backed vectors, I wrote an ArenaVec with an API that takes a pointer to the arena in all methods that can allocate, keeping the memory size down.