I like the way that std::map gives the key and value for ranged loops:
for (auto& [key, value] : my_map)

Why don't other containers allow for the "index" to also be gotten in a
similar way?

for (auto& [index, value] : any_container) would be convenient to have as
well.

Or, can this be done, but I'm just unaware? Thanks in advance.

Joey