Re^3: Why do I (sometimes) get a REF ref and not a SCALAR ref? (cycles)


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Re^3: Why do I (sometimes) get a REF ref and not a SCALAR ref? (cycles)

by tye (Sage)

on Jun 23, 2016 at 20:01 UTC ( [id://1166422]=note: print w/replies, xml )

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in reply to Re^2: Why do I (sometimes) get a REF ref and not a SCALAR ref?
in thread Why do I (sometimes) get a REF ref and not a SCALAR ref?

Circularity has nothing to do with whether "REF" or "SCALAR" is returned. "SCALAR" references can be dereferenced via ${ $ref }, exactly like "REF" references, which argues for not making that distinction. Code that is going to traverse from $sv to $$sv is often also code that will traverse from checking ref $av to checking ref $av->[0] and from checking ref $hv to checking ref $hv->{$key} and so can cycle infinitely for any of those cases.

- tye