thanks for that explanation, I experimented a bit with that behaviour and found this a fun example: 
perl -le'$i=3; print($i, $i++, $i);'
434
perl -le'$i=3; print($i, $i+1, $i);'
343

In reply to Re^2: eval order of args to a sub by eXile
in thread eval order of args to a sub by otto

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