vendor/rails/actionpack/lib/action_controller/routing/routing_ext.rb

   1 class Object
   2   def to_param
   3     to_s
   4   end
   5 end
   6
   7 class TrueClass
   8   def to_param
   9     self
  10   end
  11 end
  12
  13 class FalseClass
  14   def to_param
  15     self
  16   end
  17 end
  18
  19 class NilClass
  20   def to_param
  21     self
  22   end
  23 end
  24
  25 class Regexp #:nodoc:
  26   def number_of_captures
  27     Regexp.new("|#{source}").match('').captures.length
  28   end
  29
  30   def multiline?
  31     options & MULTILINE == MULTILINE
  32   end
  33
  34   class << self
  35     def optionalize(pattern)
  36       case unoptionalize(pattern)
  37         when /\A(.|\(.*\))\Z/ then "#{pattern}?"
  38         else "(?:#{pattern})?"
  39       end
  40     end
  41
  42     def unoptionalize(pattern)
  43       [/\A\(\?:(.*)\)\?\Z/, /\A(.|\(.*\))\?\Z/].each do |regexp|
  44         return $1 if regexp =~ pattern
  45       end
  46       return pattern
  47     end
  48   end
  49 end