You stumbled across a limitation of C++: You cannot pre-declare typedeffed
types because typedef doesn't create a real type, and there's currently no
way of saying that "xyz is a typedeffed name, but don't mind what it actually
is an alias for" (like you can do for classes and structs).

  I'm afraid there are only ugly solutions to that problem. The least ugly
of them would be to simply #include that header.

  (A very ugly solution would be to use void pointers, and then reinterpret
cast them as needed. But if you are determined to not to have to #include
that header, then that's something that would work.)

-- 
                                                          - Warp

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