This isn't possible in normal Perl (with XS, Deparse, source filters, B::*, almost anything is possible). See, a variable
name is just another reference to a
value. It's like
this:
+----------+
| |
| Variable |
| |
+----------+
|
|
V
+-------+ +-----------+
| | | |
| Value |<---------| Reference |
| | | |
+-------+ +-----------+
There's no way "back" from the value to the variable (name).
In fact, a value could have several names (think what
Exporter does, or the aliasing that happens in a for loop),
or no name at all.
Abigail
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