Are pointers allowed as keys in ordered STL containers?

Question

There\'s this other question asking about how comparing pointers is supposed to be interpreted wrt the C++ Std.

So I was wondering what the C++ Std has to say about

Answer 1

Yes, because it uses std::less, which is required to result in a total order even if < doesn't. (< would be allowed to treat different pointers from distinct sequences as equal, which would result in an odd behaviour of map etc if you insert pointers from different sequences).