var program = <<'EOT'
func foo { }
func bar { }

foo(); foo(); foo()
bar(); bar();
EOT

var parser = Parser.new                     # initialize a new parser
parser.parse_script( code => program )      # parse the code

var data = Perl.to_sidef(parser{:vars}{:main}).flatten

data.sort_by { |v| -v{:count} }.first(10).each { |entry|
    if (entry{:type} == :func) {
        say ("Function `#{entry{:name}}` (declared at line",
             " #{entry{:line}}) is used #{entry{:count}} times")
    }
}