new

# File actionpack/lib/action_dispatch/routing/mapper.rb, line 119
        def initialize(set,, ast,, controller,, default_action,, to,, formatted,, via,, options_constraints,, anchor,, scope_params,, options))
          @defaults           = scope_params[:defaults]
          @set                = set
          @to                 = intern(to)
          @default_controller = intern(controller)
          @default_action     = intern(default_action)
          @ast                = ast
          @anchor             = anchor
          @via                = via
          @internal           = options.delete(:internal)
          @scope_options      = scope_params[:options]

          path_params = []
          wildcard_options = {}
          ast.each do |node|
            if node.symbol?
              path_params << node.to_sym
            elsif formatted != false && node.star?
              # Add a constraint for wildcard route to make it non-greedy and match the
              # optional format part of the route by default.
              wildcard_options[node.name.to_sym] ||= /.+?/
            elsif node.cat?
              alter_regex_for_custom_routes(node)
            end
          end

          options = wildcard_options.merge!(options)

          options = normalize_options!(options, path_params, scope_params[:module])

          split_options = constraints(options, path_params)

          constraints = scope_params[:constraints].merge Hash[split_options[:constraints] || []]

          if options_constraints.is_a?(Hash)
            @defaults = Hash[options_constraints.find_all { |key, default|
              URL_OPTIONS.include?(key) && (String === default || Integer === default)
            }].merge @defaults
            @blocks = scope_params[:blocks]
            constraints.merge! options_constraints
          else
            @blocks = blocks(options_constraints)
          end

          requirements, conditions = split_constraints path_params, constraints
          verify_regexp_requirements requirements.map(&:last).grep(Regexp)

          formats = normalize_format(formatted)

          @requirements = formats[:requirements].merge Hash[requirements]
          @conditions = Hash[conditions]
          @defaults = formats[:defaults].merge(@defaults).merge(normalize_defaults(options))

          if path_params.include?(:action) && !@requirements.key?(:action)
            @defaults[:action] ||= "index"
          end

          @required_defaults = (split_options[:required_defaults] || []).map(&:first)
        end