[boost] fun with member pointers (was Re: Cast free NULLs in algorithms)

Andrey Semashev wrote:

I'm surprised too. I always though that T U::* and T (U::*)() are very different types. I didn't find in the Standard any notes that they are the same.

A common misconception invented by the authors of GCC, I guess ;-). With MSVC, the type expression 'U C::*' deduced from a member function pointer T (with default options) will surprisingly yields a type incompatible to T (as member functions are implicitly __thiscall attributed, where U C::* becomes __cdecl, because U is the type of a freestanding function and __thiscall only exists for member functions). Regards, Tobias