Forum: JRuby void value expression

I noticed that this code:

def go
  a = true
  b = nil
  return a.nil? or b.nil?
end
puts go


actually returns false in jruby--I would have expected it to return
true, and in MRI (1.8.6, 1.9.1), it yields:

bad.rb:4: void value expression

(so I suppose if it wants to match MRI, it should raise that error).
Is this a bug?
Thanks.
-r

I  think the problem has to do with the low operator precedence of the
or operator.

The following code works:

def go
  a = true
  b = nil

  return  (a.nil? or b.nil?)

end
puts go


But I agree that the different implementations should at least throw
the same error message.


Regards
   Roger

Am 09.02.2010 um 20:56 schrieb Roger Pack:

> actually returns false in jruby--I would have expected it to return
>
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Hi Roger and Roger,

I agree that this seems to be a JRuby compatibility issue and it is
definitely worth filing a JRuby issue for that, could you guys file
one?

Ideally, we should have RubySpec test for that as well.

Thanks,
  --Vladimir

On Tue, Feb 9, 2010 at 9:38 PM, Roger Gilliar <roger@gilliar.de> wrote:
>
>
>>
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On Tue, Feb 9, 2010 at 10:39 PM, Vladimir Sizikov <vsizikov@gmail.com> 
wrote:
> Ideally, we should have RubySpec test for that as well.

So, I just added RubySpecs for this case:
http://github.com/rubyspec/rubyspec/commit/38bd0643c3e7bdba0aecf5eb91b0be9b56b5b5d7

But we still need a JRuby bug filed! :)

Thanks,
  --Vladimir

>>  return  (a.nil? or b.nil?)
>>  Roger
>>> puts go
>>> -r
>>
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> But we still need a JRuby bug filed! :)

http://jira.codehaus.org/browse/JRUBY-4549