Re: [MacRuby-devel] [MacRuby] #549: Class variables are not initialised properly.

10 Feb 2010

      #549: Class variables are not initialised properly.
-------------------------------------+--------------------------------------
 Reporter:  sorin.ionescu@…          |       Owner:  lsansonetti@…        
     Type:  defect                   |      Status:  new                  
 Priority:  blocker                  |   Milestone:  MacRuby 0.5          
Component:  MacRuby                  |    Keywords:  class, instance      
-------------------------------------+--------------------------------------
Description changed by martinlagardette@…:

Old description:
...
The mime-types gem has a class and an instance interface. The class
interface uses an instance of itself. However, it doesn’t work in
MacRuby. It does not seem to be initialised properly. I have included in
a sample code with the expected behaviour. Changing @__types__ to
@@__types__ will not fix it.
{{{
#!/usr/bin/env macruby
class Test
  def initialize()
        @foo = true
  end
def add(something)
        puts "Is foo nil: #{@foo.nil?}"
  end
@__types__ = self.new()
def self.add(something)
        @__types__.add(something)
  end
end
t = Test.new
t.add(3)
Test.add(4)
}}}
Output (MacRuby 0.5)
{{{
Is foo nil: false
Is foo nil: true
}}}
Expected (Ruby 1.9.1/1.8.7)
{{{
Is foo nil: false
Is foo nil: false
}}}
New description:

 The mime-types gem has a class and an instance interface. The class
 interface uses an instance of itself. However, it doesn’t work in MacRuby.
 It does not seem to be initialised properly. I have included in a sample
 code with the expected behaviour. Changing `@__types__` to `@@__types__`
 will not fix it.

 {{{
 #!/usr/bin/env macruby

 class Test
   def initialize()
     @foo = true
   end

   def add(something)
     puts "Is foo nil: #{@foo.nil?}"
   end

   @__types__ = self.new()

   def self.add(something)
     @__types__.add(something)
   end
 end

 t = Test.new
 t.add(3)
 Test.add(4)
 }}}

 Output (MacRuby 0.5)
 {{{
 Is foo nil: false
 Is foo nil: true
 }}}
 Expected (Ruby 1.9.1/1.8.7)
 {{{
 Is foo nil: false
 Is foo nil: false
 }}}

--

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Ticket URL: <http://www.macruby.org/trac/ticket/549#comment:3>
MacRuby <http://macruby.org/>