After $bates_number =~ m{...} you can do 

my ($pfx, $num) =
    map substr($bates_number, $-[$_], $+[$_] - $-[$_]),
    grep defined $-[$_],
    1 .. $#+
;

[download]
to get the subgroups that matched. (See perlvar for @- and @+.) This way you avoid the tricky bits about having variables in your code assertions, but more importantly: you can factor out the patterns you join together with alternation (as long as you make sure they always match with two capturing subpatterns).

lodin

In reply to Re: Matching Multiple Alternative Patterns and Capturing Multiple Subexpressions by lodin
in thread Matching Multiple Alternative Patterns and Capturing Multiple Subexpressions by Jim

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