On April 13, 2006 09:35 am, Brian Griffin wrote:
>  > The first [set x] works, but not the second.    Maybe this suggests that
>  > the syntax should require braces
>  >
>  >   set x [(.0+3)]
> 
>  Do you mean parentheses (()), or do you really mean braces ({})?  I
>  think requiring braces is a bad idea.

The former.  The idea is that expr already groks () in expressions so if
it fails to resolve to a command it can be passed it to Tcl_ExprObj directly
by [unknown].

>  I think in this case ".0" should *not* be recognized as a number.  This
>  is not an unreasonable restriction for expressions, IMO.

The same breakage can result from [proc 0 ...] etc.

A more real-world example of this tip in use is something like:

  set x [$a+9]

Does placing restrictions on the value of $a make sense?

-- 
Peter MacDonald                 PDQ Interfaces Inc
Email: peter@[...].com      	http://pdqi.com
Phone: (250) 595-5998



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