Thread: std::allocator <memory>

Not understanding this.

Code:

std::allocator<string> alloc;
auto const p = alloc.allocate(10);

Results in p have a <Bad Ptr> upon inspection.

Code:

std::allocator<string*> alloc;
auto const p = alloc.allocate(10);

This is fine. Why is that as well as for integral types like int? C++ Primer has a clear example using a std::string for the templated type of allocator .