From: Alexandre Mutel <alexandre_mutel@...>
Date: 2009-12-22T07:51:32+09:00
Subject: Strange behavior of unary +@ for Fixnum?

It seems that it's not possible to use the unary +@ operator for Fixnum
in a "short form" way :

class Fixnum
  def +@
    puts "YES #{self}"
  end
end
=> nil

+50
=> 50           # Unexpected result : should print YES 50

+(50)
YES 50
=> nil

Although, the +(fixnum) form is working... i wish i could use the
shorter form!

I suspect Ruby's parser to perform some unexpected "optimization"
here...
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