write_recognition!

# File actionpack/lib/action_controller/routing/route.rb, line 198
        def write_recognition!
          # Create an if structure to extract the params from a match if it occurs.
          body = "params = parameter_shell.dup\n#{recognition_extraction * "\n"}\nparams"
          body = "if #{recognition_conditions.join(" && ")}\n#{body}\nend"

          # Build the method declaration and compile it
          method_decl = "def recognize(path, env = {})\n#{body}\nend"
          instance_eval method_decl, "generated code (#{__FILE__}:#{__LINE__})"
          method_decl
        end