#!/usr/bin/perl -ln
use strict;
use warnings;
sub expand;
sub doit;
print for expand $_;
sub expand {
local $_=shift;
return doit $`, (split /:/, $1), $' if /\{([\w:]+)\}/;
return doit $`, $1 .. $2 , $' if /\[(\w+):(\w+)\]/;
$_;
}
sub doit {
my ($pre,$post)=(shift,pop);
map { my $pre=$pre . $_;
map $pre . $_, expand $post } @_;
}
__END__
####
foo[01:100]bar-{fred:barney:wilma}
##
##
foo01bar-fred
foo02bar-fred
...
foo100bar-fred
foo01bar-barney
...
foo100bar-wilma