map_match

# File actionpack/lib/action_dispatch/routing/mapper.rb, line 1901
          def map_match(paths, options)
            if (on = options[:on]) && !VALID_ON_OPTIONS.include?(on)
              raise ArgumentError, "Unknown scope #{on.inspect} given to :on"
            end

            if @scope[:to]
              options[:to] ||= @scope[:to]
            end

            if @scope[:controller] && @scope[:action]
              options[:to] ||= "#{@scope[:controller]}##{@scope[:action]}"
            end

            controller = options.delete(:controller) || @scope[:controller]
            option_path = options.delete :path
            to = options.delete :to
            via = Mapping.check_via Array(options.delete(:via) {
              @scope[:via]
            })
            formatted = options.delete(:format) { @scope[:format] }
            anchor = options.delete(:anchor) { true }
            options_constraints = options.delete(:constraints) || {}

            path_types = paths.group_by(&:class)
            (path_types[String] || []).each do |_path|
              route_options = options.dup
              if _path && option_path
                raise ArgumentError, "Ambiguous route definition. Both :path and the route path were specified as strings."
              end
              to = get_to_from_path(_path, to, route_options[:action])
              decomposed_match(_path, controller, route_options, _path, to, via, formatted, anchor, options_constraints)
            end

            (path_types[Symbol] || []).each do |action|
              route_options = options.dup
              decomposed_match(action, controller, route_options, option_path, to, via, formatted, anchor, options_constraints)
            end

            self
          end