Contents

module Johnson
  module Visitable
    # Based off the visitor pattern from RubyGarden
    def accept(visitor, &block)
      klass = self.class.ancestors.find { |ancestor|
        visitor.respond_to?("visit_#{ancestor.name.split(/::/)[-1]}")
      }

      if klass
        visitor.send(:"visit_#{klass.name.split(/::/)[-1]}", self, &block)
      else
        raise "No visitor for '#{self.class}' at line #{line}"
      end
    end
  end
end

Version data entries

27 entries across 27 versions & 5 rubygems

Version	Path
jbarnette-johnson-1.0.0.200806240111	lib/johnson/visitable.rb
jbarnette-johnson-1.0.0.200807291507	lib/johnson/visitable.rb
jbarnette-johnson-1.0.0.200808062051	lib/johnson/visitable.rb
jbarnette-johnson-1.0.0.200808062111	lib/johnson/visitable.rb
jbarnette-johnson-1.0.0.200811251942	lib/johnson/visitable.rb
jbarnette-johnson-1.0.0.20081126120511	lib/johnson/visitable.rb
jbarnette-johnson-1.0.0.20090127202936	lib/johnson/visitable.rb
jbarnette-johnson-1.0.0.20090225110820	lib/johnson/visitable.rb
jbarnette-johnson-1.0.0.20090326122910	lib/johnson/visitable.rb
jbarnette-johnson-1.0.0.20090326154650	lib/johnson/visitable.rb
jbarnette-johnson-1.0.0.20090326161333	lib/johnson/visitable.rb
jbarnette-johnson-1.0.0.20090402144841	lib/johnson/visitable.rb
jbarnette-johnson-1.0.0.20090402155420	lib/johnson/visitable.rb
johnson19-2.0.0.pre3	lib/johnson/visitable.rb
pre-johnson-2.0.0	lib/johnson/visitable.rb
johnson-2.0.0.pre3	lib/johnson/visitable.rb
johnson-2.0.0.pre2	lib/johnson/visitable.rb
johnson-2.0.0.pre1	lib/johnson/visitable.rb
johnson-2.0.0.pre0	lib/johnson/visitable.rb
johnson-1.2.0	lib/johnson/visitable.rb