http://bugs.winehq.org/show_bug.cgi?id=10122 Anastasius Focht <focht(a)gmx.net> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |focht(a)gmx.net --- Comment #5 from Anastasius Focht <focht(a)gmx.net> 2007-10-26 18:03:28 --- Hello, that dynamic_cast/__RTDynamicCast "unknown" parameter looks like some virtual function table offset/delta when downcasting virtual base classes. I wrote some sample, though the downcast itself is not really useful in that case. --- snip sample --- struct vbase { virtual int get_num() const = 0; }; struct base : virtual vbase { int get_num() const { return 1; } }; struct derived : virtual base { int get_num() const { return 2; } }; int main () { base b; derived* d = dynamic_cast<derived*>(&b); return 0; } --- snip sample --- __RTDynamicCast "unknown" -> virtual function table offset is 4 object memory layout for "b": ofs+0: pointer to virtual base class table of "derived" ofs+4: pointer to virtual function table of "base" Regards -- Configure bugmail: http://bugs.winehq.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching all bug changes.