Neil Madden wrote:
>  Hi,
>  
>  I was going to reply at length again, but I'd just be repeating the  
>  same points. My feeling is that a more fruitful discussion could be  
>  had with a concrete reference implementation to play with. I realise  
>  that may not be your immediate focus, so until then, I wish you the  
>  best with the effort.

Thank you! I'll try to do my best to come up with a (probably Tcl-based) 
mock implementation for experimentation purpose.

BTW, are you happy with the proposed syntax, besides agreeing or not on 
the whole concept of references? I.e.:

  $var  : regular value substitution
  $&var : strong reference (early bound)
  $@var : weak reference (late bound on access), semantically identical
          to var name.

After all, that was the point of the original message ;-)

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