#!/usr/bin/perl

# [[[ PREPROCESSOR ]]]
# <<< PARSE_ERROR: 'ERROR ECOPAPL02' >>>
# <<< PARSE_ERROR: 'near "keys"' >>>
# <<< PARSE_ERROR: 'Global symbol "$foo" requires explicit package name' >>>

# [[[ HEADER ]]]
use RPerl;
use strict;
use warnings;
our $VERSION = 0.001_000;

# [[[ CRITICS ]]]
## no critic qw(ProhibitUselessNoCritic ProhibitMagicNumbers RequireCheckedSyscalls)  # USER DEFAULT 1: allow numeric values & print operator
## no critic qw(RequireInterpolationOfMetachars)  # USER DEFAULT 2: allow single-quoted control characters & sigils

# [[[ OPERATIONS ]]]

my string_hashref $foo = { puppet => 'howdy doody', host => 'buffalo bob', sidekick => 'clarabell clown' }
keys %{$foo};