CODEWITHSUNDEEP
regexperl
mjp
mjp

Reputation: 207

perl regexp {min,max} - which scenario reported

Is there a way to decipher which scenario is being reported by match $& when regexp searches for a pattern /[XY]{15,20}[WZ]{10,15}[XY]{15,20}/g in a string that has mutliple matches for the regexp?

I'm trying to avoid combinatorics of:

[XY]{15}[WZ]{10}[XY]{15}
[XY]{15}[WZ]{10}[XY]{16}
[XY]{15}[WZ]{10}[XY]{17}
...
[XY]{16}[WZ]{10}[XY]{15}
[XY]{17}[WZ]{10}[XY]{15}
...

from which I would know which scenario is being reported.

By scenario I mean is it: [XY]{15}[WZ]{10}[XY]{16} that has match in the string or is it [XY]{16}[WZ]{10}[XY]{15}?

Any advice is appreciated.

Upvotes: 0

Views: 122

Answers (1)

Miller
Miller

Reputation: 35208

As mpapec already suggested, you just need to capture those subexpressions if you want to determine more info about them.

while ($string =~ /(([XY]{15,20})([WZ]{10,15})([XY]{15,20}))/g {
    my ($whole, $xy1, $wz, $xy2) = ($1, $2, $3, $4);

    print join(',', map length, ($xy1, $wz, $xy2)), "\n";

Upvotes: 2

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