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And with some sanity checking:

>perl -wMstrict -le "my @t = ( 'YUGRABCKFI01-', 'GRREPCCOBE10-', ); ;; ENTRY: for my $entry ('BR|RG', 'FI', '(?{ `rm -R *` })', '++') { my $rx = eval { qr{ \A [A-Z]{6} [A-Z\d]{2} (?: $entry) }xms }; if ($@) { print qq{user entered '$entry' is evil: $@}; next ENTRY; } for my $t (@t, @ARGV) { printf qq{%7s %-3smatch with '$t' \n}, qq{'$entry'}, $t =~ $rx ? '' : 'NO' ; } } " "STTLWA02RG01_2011-10-" 'BR|RG' NO match with 'YUGRABCKFI01-' 'BR|RG' NO match with 'GRREPCCOBE10-' 'BR|RG' match with 'STTLWA02RG01_2011-10-' 'FI' match with 'YUGRABCKFI01-' 'FI' NO match with 'GRREPCCOBE10-' 'FI' NO match with 'STTLWA02RG01_2011-10-' user entered '(?{ `rm -R *` })' is evil: Eval-group not allowed at runtime, use re 'eval' in regex m/ \A [A-Z]{6} [A-Z\d]{2} (?: (?{ `rm -R *` })) / at ... user entered '++' is evil: Quantifier follows nothing in regex; marked by <-- HERE in m/ \A [A-Z]{6} [A-Z\d]{2} (?: + <-- HERE +) / at ...

In reply to Re^3: Regex matching after ASCII characters by AnomalousMonk
in thread Regex matching after ASCII characters by Anonymous Monk

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