What happens when you call data() on a std::vector<bool>?

C++11 has implemented data() member function on std::vector, which gives you a pointer to the memory array. Does this mean the template specialization std::vector<bool> have this member as well? Since this specialization doesn't store the data in terms of bool *, what kind of behavior can you expect from calling data() ?

It won't compile, unless your implementation has a non-standard extension. The specialisation of std::vector<bool>, as specified in C++11 23.3.7/1, doesn't declare a data member.

This page documenting the class explicitely indicates that the specialization does not provide this method.

The specialization has the same member functions as the unspecialized vector, except data, emplace, and emplace_back, that are not present in this specialization.

This other page as well as §23.3.7 of the C++ specifications do confirm it.

No. Per std::vector<bool>

Does not necessarily store its data in a single contiguous chunk of memory.

There is no data() member.

Well, there is no std::vector<bool>::data, so what you can expect is a compile error.