write_generation

# File actionpack/lib/action_controller/routing/route.rb, line 26
      def write_generation
        # Build the main body of the generation
        body = "expired = false\n#{generation_extraction}\n#{generation_structure}"

        # If we have conditions that must be tested first, nest the body inside an if
        body = "if #{generation_requirements}\n#{body}\nend" if generation_requirements
        args = "options, hash, expire_on = {}"

        # Nest the body inside of a def block, and then compile it.
        raw_method = method_decl = "def generate_raw(#{args})\npath = begin\n#{body}\nend\n[path, hash]\nend"
        instance_eval method_decl, "generated code (#{__FILE__}:#{__LINE__})"

        # expire_on.keys == recall.keys; in other words, the keys in the expire_on hash
        # are the same as the keys that were recalled from the previous request. Thus,
        # we can use the expire_on.keys to determine which keys ought to be used to build
        # the query string. (Never use keys from the recalled request when building the
        # query string.)

        method_decl = "def generate(#{args})\npath, hash = generate_raw(options, hash, expire_on)\nappend_query_string(path, hash, extra_keys(options))\nend"
        instance_eval method_decl, "generated code (#{__FILE__}:#{__LINE__})"

        method_decl = "def generate_extras(#{args})\npath, hash = generate_raw(options, hash, expire_on)\n[path, extra_keys(options)]\nend"
        instance_eval method_decl, "generated code (#{__FILE__}:#{__LINE__})"
        raw_method
      end