constraint_args

# File actionpack/lib/action_dispatch/routing/mapper.rb, line 53
          def constraint_args(constraint, request)
            arity = if constraint.respond_to?(:arity)
              constraint.arity
            else
              constraint.method(:call).arity
            end

            if arity < 1
              []
            elsif arity == 1
              [request]
            else
              [request.path_parameters, request]
            end
          end