Sha256: 55069f037f9fde40f33b1d9a4880db91458dcc647f85dbe457295b749fcb2072
Contents?: true
Size: 1.05 KB
Versions: 12
Compression:
Stored size: 1.05 KB
Contents
# -*- coding: UTF-8 -*-
module MJ;
class Visitable
def accept( visitor )
raise "#{visitor.class} is not a visitable class" if visitor.instance_of? VisitorBase
method_name = nil
klass = self.class.ancestors.find do |ancestor|
method_name = "visit_#{ancestor.name.split('::')[-1]}"
visitor.respond_to?( method_name )
end
if klass
return visitor.send( method_name, self )
else
raise "#{visitor.class}: Should not happen!"
end
end
end
# Base class for all Visitors.
class VisitorBase
# The configuration object to fill with our parse results.
attr_reader :configuration
class ArgumentsError < StandardError
end
def initialize( configuration )
@configuration = configuration
end
def visit_Object( object )
raise "#{self.class}: Not a visitor for #{object.class}!"
end
end # class VisitorBase
end
Version data entries
12 entries across 12 versions & 1 rubygems