s2p helps you migrate from sed to perl
$ s2p "s!.*pts/\([0-9][0-9]*\).*!\1!" produces
...
BOS:;
# s!.*pts/\([0-9][0-9]*\).*!\1!
{ $s = s !.*pts/(\d\d*).*!${1}!s;
$CondReg ||= $s;
}
${1} is $1 is \1
\(\) is ()
[0-9] is \d
* is *
. is .
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