irb(main):001:0> class Bar; def foo=(val); puts "Bar#foo= called!"; end; end
irb(main):002:0> Bar.new.instance_eval { foo = 1 }          #=> no output
irb(main):003:0> Bar.new.instance_eval { foo= 1 }           #=> no output
irb(main):004:0> Bar.new.instance_eval { self.foo = 1 }   #=> Bar#foo= called!

It seems like the only way to call Bar#foo= inside and instance of Bar
is by prefixing self explicitly. Am I right about this?

-- 
-Alder