class JMESPath::Nodes::LengthFunction

def call(args)
  if args.count == 1
    value = args.first
  else
    return maybe_raise Errors::InvalidArityError, 'function length() expects one argument'
  end
  if value.respond_to?(:to_hash)
    value.to_hash.size
  elsif value.respond_to?(:to_ary)
    value.to_ary.size
  elsif value.respond_to?(:to_str)
    value.to_str.size
  else
    return maybe_raise Errors::InvalidTypeError, 'function length() expects string, array or object'
  end
end