Hi,
I came across these two pieces of codes, why would the "local $i=$i+1"
be backtracking-safe?
$_ = 'lothlorien';
m/ (?{ $i = 0 }) # Set $i to 0
(. (?{ $i++ }) )* # Update $i, even after
backtracking
lori # Forces a backtrack
/x;
$_ = 'lothlorien';
m/ (?{ $i = 0 })
(. (?{ local $i = $i + 1; }) )* # Update $i, backtracking-safe.
lori
(?{ $result = $i }) # Copy to non-localized location.
/x;
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