I don't think one needs use POSIX, at least with the more recent versions of perl; e.g. with v5.8.4: 

#!perl -l

use strict;
use warnings;

my $s = 'a1b2c3';

print for $s =~ /[[:alpha:]]/g;
print for $s =~ /[[:digit:]]/g;
__END__
a
b
c
1
2
3

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the lowliest monk

In reply to Re^2: negating POSIX regexp classes doesn't work as expected by tlm
in thread negating POSIX regexp classes doesn't work as expected by cazz

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