I'm looking at a '+=' overload XSub that neither increments the refcount nor (afaict) returns anything

Ah, but it does return a value.

The XPUSHs() also puzzles me. What does that achieve?

It pushes a value on the return stack. See perlapi.

Anno

In reply to Re^3: Overload '+=' with XSub by Anno
in thread Overload '+=' with XSub by syphilis

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