in reply to Re^3: Using vec() from XS
in thread Using vec() from XS

...and the lvalue part just builds an SV with some magic attached and returns it.

When a set operation is performed on the returned SV, the "set" operation from the magic vtable performs the real set on the original SV (the vector) indirectly

That can also be easily replicated in XS code.

In Section Seekers of Perl Wisdom