#!/usr/bin/perl --
package NameSpace;
{

    use PerlX::QuoteOperator CO => {
        -emulate => 'q', 
        -with    => do {
            my %CO = qw[ RO 1 SHAM 2 BO 3 ];
            sub ($) { $CO{ uc $_[0]} };
        }, 
    };

    print CO(RO), "\n";
#~     print CO'SHAM', "\n"; ## Can't find string terminator "'" anywhere before EOF 
    print CO"SHAM", "\n";
    print CO/BO/, "\n";
}

print "OUTSIDE", CO(SHAM), "\n";
eval q{
    print "from eval ", CO(SHAM), "\n";
} or die $@;
__END__
1
2
3
OUTSIDE2
from eval 2