AFAIK, flat_* containers are really a std::vector disguised (wrapped) as a std::map or std::set. Basically I assume that you are correct. You can even manipulate manually the vector content if you want, as long as you keep the invariants valid (for example, keep the elements in sorted order). On Sat, Sep 13, 2014 at 11:00 AM, Aaron Levy <aaron.levy@yandex.com> wrote:

What is the type of the underlying contiguous storage used by the flat_map / flat_set containers? Does the following code make sense:

flat_map<T> container; ... if (container.size() > 0) { const T& elem = *(container.begin()); const T& elem_1 = *(container.begin() + 1); assert(&elem_1 == &elem + 1); }

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