add_route

# File actionpack/lib/action_dispatch/routing/route_set.rb, line 297
      def add_route(app, conditions = {}, requirements = {}, defaults = {}, name = nil, anchor = true)
        raise ArgumentError, "Invalid route name: '#{name}'" unless name.blank? || name.to_s.match(/^[_a-z]\w*$/)
        route = Route.new(self, app, conditions, requirements, defaults, name, anchor)
        @set.add_route(*route)
        named_routes[name] = route if name
        routes << route
        route
      end