Adding instance variables using module include

Ruby
1

Hi there,

If I have a module and class like this:

module VisitMemory
def mark_visited(method)
@methods_visited << method.my_declaration_signature
end

def already_visited?(method)
    @methods_visited.include?(method.my_declaration_signature)
end

end

module Guff
module JavaSource
class Class
include VisitMemory
end
end
end

How can i ensure that all instances of Guff::JavaSource::Class is
going to have the instance variable @methods_visited ?

So that this will work:

Guff::JavaSource::Class.new.already_visited?(something)

Thanks very much,
Mike.

2

FWIW, this is the best I could do:

module VisitMemory
def mark_visited(method)
methods_visited << method.my_declaration_signature
end

def already_visited?(method)
    methods_visited.include?(method.my_declaration_signature)
end
def methods_visited
    @methods_visited ||= []
end

end

module Guff
module JavaSource
class Class
include VisitMemory
end
end
end

3

2008/1/28, [email protected] [email protected]:

    @methods_visited.include?(method.my_declaration_signature)

How can i ensure that all instances of Guff::JavaSource::Class is
going to have the instance variable @methods_visited ?

require ‘set’

module VisitMemory
def mark_visited(method)
(@methods_visited ||= Set.new) << method.my_declaration_signature
end

def already_visited?(method)
@methods_visited and
@methods_visited.include?(method.my_declaration_signature)
end
end

So that this will work:

Guff::JavaSource::Class.new.already_visited?(something)

Cheers

robert