For simplicity's sake, I vote for hardcoding.

Hardcoding is hard. 

   eval {
#line 1 SpecialZone1
       $code_ref->();
   };
#line 23 file.pl

[download]

You have to make sure "SpecialZone1" is unique.
You have to make sure "23" and "file.pl" are correct.

In reply to Re^2: Trapping errors with specificity by ikegami
in thread Trapping errors with specificity by diotalevi

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