# File lib/jmespath/nodes/function.rb, line 179
      def call(args)
        if args.count == 1
          value = args.first
        else
          return maybe_raise Errors::InvalidArityError, "function length() expects one argument"
        end
        case value
        when Hash, Array, String then value.size
        else return maybe_raise Errors::InvalidTypeError, "function length() expects string, array or object"
        end
      end