Suppose I have a set of regural expression, and I want to match a string against them all together and do something depending on which of those expressions did match.

If those are just words, life's easy: put them all in parentheses and see what's in $1 after match.

I think I can use named captures:

#!/usr/bin/perl -w

use 5.010; # want named captures
use strict;
use warnings;

my @reglist = ( qr/food?/, qr/b[a4]rd?/, qr/baz(o+ka)?/ );
my $i; # regex index
my $giant_regex = join "|", map { $i++; "(?<r$i>$_)" } @reglist;
$giant_regex = qr/($giant_regex)/;

foreach (qw(foobarbaz football barcode none bazoooooka)) {
    $_ =~ m/$giant_regex/;
    my @match = keys %+;
    print "@match\n";
}

[download]

The above code sample works, but maybe there are simpler variants and/or variants compatible with older perls?

In reply to Find out which subpattern matched in regex by Dallaylaen

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