And if you don't have the time to dig through perlapi, perl tries not to rely on the C stack for manipulation of variables, returning by pushing onto the return stack is the prefered method, assuming you've first set the stack up correctly. While I haven't played with overloading and C I believe the principle is the same.

In reply to Re^4: Overload '+=' with XSub by Trizor
in thread Overload '+=' with XSub by syphilis

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