From: Brian Candler <B.Candler@...>
Date: 2003-02-05T04:33:08+09:00
Subject: Re: Local variables & blocks

On Tue, Feb 04, 2003 at 07:28:26PM +0000, Brian Candler wrote:
> This request can be considered entirely separately from the block-scoping
> issue. It would incidentally catch a few perverse cases, for example
> 
>   i = 0
>   ...
>   [1,2,3].each { |i|
>      i = 7            # << HERE, this value is never retrieved
>   }

Oh and just to be clear, I'm not asking for any sort of data-flow analysis;
just a trivial check that at least one access has been made.

  [1,2,3].each { |i|
     puts i             # value of 'i' is used (usage count > 0)
     i = 7              # so no warning here
  }
    
Regards,

Brian.