I have to admit, I don't understand your code, I know \1 in the context of RegEx but otherwise couldn't find any reference for it in the docs. do you have a link, please?

1 is a constant. \ takes a reference.

Or do you mean that aliased symbols of variables in perl don't neccessarily have the same reference?

I didn't speculate or investigate what a copy would be made.

However, I made a mistake. I forgot to take into account that \1 is a constant itself. 

>perl -MO=Concise -e"$x = \1"
6  <@> leave[1 ref] vKP/REFC ->(end)
1     <0> enter ->2
2     <;> nextstate(main 1 -e:1) v ->3
5     <2> sassign vKS/2 ->6
3        <$> const[RV \1] s ->4             <-----
-        <1> ex-rv2sv sKRM*/1 ->5
4           <#> gvsv[*x] s ->5
-e syntax OK

[download]

My conclusion was based on observed results, which were based on a faulty assumption. Please ignore.

On the plus side, it's a simple of way of generating a unique id for a spot in a file! Isn't that what you were after? It's not clear how you'd find out which spot is associated with which id, though.

In reply to Re^11: Reference of constants and literals by ikegami
in thread Reference of constants and literals by LanX

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