Great, please take it to Seekers Of Perl Wisdom, see Re^2: Using Look-ahead and Look-behind

You forgot to include sample input, no matter, here are clues, run these and compare 

perl -Mre=debug -le " $_ = q/foobarfoodrinkAATT/; /foo((?:(?!bar).){1,
+5}?)AATT/; "

[download]

perl -Mre=debug -le " $_ = q/foobarfoodrinkAATTAATT/; /foo((?:(?!bar).
+){6,10}?)AATT/; "

[download]

50,100 means match at minimum 50 but no more than 100

.* means match at least zero times

in my short example, first AATT appears at 6, so it is included in the match

In reply to Re^5: Using Look-ahead and Look-behind by Anonymous Monk
in thread Using Look-ahead and Look-behind by Roy Johnson

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