use strict;

package LoudDecl;
use Attribute::Handlers;
use attributes;
use Scalar::Util;

my %attrs;

sub FETCH_CODE_ATTRIBUTES {
    @{$attrs{Scalar::Util::refaddr($_[1])}};
}

sub Loud :ATTR {
    print "NOISE!\n";
    no strict 'refs';
    push @{$attrs{Scalar::Util::refaddr($_[2])}}, 'Loud';
}   

sub Boom :ATTR {
    print "BOOM!\n";
    no strict 'refs';
    push @{$attrs{Scalar::Util::refaddr($_[2])}}, 'Boom';
}   

sub foo: Loud method {
  print 1;
} 

sub bar : Loud Boom method {
    print "pling.\n";
}   

print "Attributes: ";
print join ', ', attributes::get(\&bar);
print "\n";
__END__
NOISE!
NOISE!
BOOM!
Attributes: method, Loud, Boom