require 'action_dispatch/journey/visitors' module ActionDispatch module Journey # :nodoc: module Nodes # :nodoc: class Node # :nodoc: include Enumerable attr_accessor :left, :memo def initialize(left) @left = left @memo = nil end def each(&block) Visitors::Each::INSTANCE.accept(self, block) end def to_s Visitors::String::INSTANCE.accept(self, '') end def to_dot Visitors::Dot::INSTANCE.accept(self) end def to_sym name.to_sym end def name left.tr '*:'.freeze, ''.freeze end def type raise NotImplementedError end def symbol?; false; end def literal?; false; end def terminal?; false; end def star?; false; end def cat?; false; end end class Terminal < Node # :nodoc: alias :symbol :left def terminal?; true; end end class Literal < Terminal # :nodoc: def literal?; true; end def type; :LITERAL; end end class Dummy < Literal # :nodoc: def initialize(x = Object.new) super end def literal?; false; end end %w{ Symbol Slash Dot }.each do |t| class_eval <<-eoruby, __FILE__, __LINE__ + 1 class #{t} < Terminal; def type; :#{t.upcase}; end end eoruby end class Symbol < Terminal # :nodoc: attr_accessor :regexp alias :symbol :regexp attr_reader :name DEFAULT_EXP = /[^\.\/\?]+/ def initialize(left) super @regexp = DEFAULT_EXP @name = left.tr '*:'.freeze, ''.freeze end def default_regexp? regexp == DEFAULT_EXP end def symbol?; true; end end class Unary < Node # :nodoc: def children; [left] end end class Group < Unary # :nodoc: def type; :GROUP; end end class Star < Unary # :nodoc: def star?; true; end def type; :STAR; end def name left.name.tr '*:', '' end end class Binary < Node # :nodoc: attr_accessor :right def initialize(left, right) super(left) @right = right end def children; [left, right] end end class Cat < Binary # :nodoc: def cat?; true; end def type; :CAT; end end class Or < Node # :nodoc: attr_reader :children def initialize(children) @children = children end def type; :OR; end end end end end