# File lib/json/pure/generator.rb, line 292
        def generate(obj)
          result = obj.to_json(self)
          JSON.valid_utf8?(result) or raise GeneratorError,
            "source sequence #{result.inspect} is illegal/malformed utf-8"
          unless @quirks_mode
            unless result =~ /\A\s*\[/ && result =~ /\]\s*\Z/ ||
              result =~ /\A\s*\{/ && result =~ /\}\s*\Z/
            then
              raise GeneratorError, "only generation of JSON objects or arrays allowed"
            end
          end
          result
        end