Perhaps Perl's (v5.10+) smart-match operator can help:
use strict;
use warnings;
my @array = qw/1 2 3/;
print 'The variable is ' . ( is123(@array) ? '' : 'not ' ) . '[1 .. 3]
+.';
sub is123 { @_ ~~ [ 1 .. 3 ] }
Output:
The variable is [1 .. 3].
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