diff options
Diffstat (limited to 'actionpack/lib/action_dispatch/journey/nodes/node.rb')
-rw-r--r-- | actionpack/lib/action_dispatch/journey/nodes/node.rb | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/journey/nodes/node.rb b/actionpack/lib/action_dispatch/journey/nodes/node.rb new file mode 100644 index 0000000000..bb01c087bc --- /dev/null +++ b/actionpack/lib/action_dispatch/journey/nodes/node.rb @@ -0,0 +1,128 @@ +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.new(block).accept(self) + end + + def to_s + Visitors::String.new.accept(self) + end + + def to_dot + Visitors::Dot.new.accept(self) + end + + def to_sym + name.to_sym + end + + def name + left.tr '*:', '' + end + + def type + raise NotImplementedError + end + + def symbol?; false; end + def literal?; false; end + end + + class Terminal < Node # :nodoc: + alias :symbol :left + 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 + + DEFAULT_EXP = /[^\.\/\?]+/ + def initialize(left) + super + @regexp = DEFAULT_EXP + 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 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 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 |