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Date: Mon, 05 Jul 2010 12:26:15 +0200
From: Georg Bauhaus <rm.dash-bauhaus@futureapps.de>
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Subject: Re: Gnat GPL 2010 available soon (conditional expressions)
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Date: 2010-07-05T12:26:09+02:00
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On 05.07.10 03:27, Phil Clayton wrote:
> On Jun 30, 4:21 am, Britt Snodgrass <britt.snodgr...@gmail.com> wrote:

> For formal verification tools, conditional expressions could be
> useful.  For example, there are two paths through
> 
>   if C then
>     Y := A;
>   else
>     Y := B;
>   end if;
> 
> but only one path through
> 
>   Y := (if C then A else B);

Any advantage over a function---which in SPARK case will
be a pure function, IIRC?

  Y := Find_Y (Depends => C);

> In my view, condition expressions are a step in the right direction...
> but I'm the sort of person who wants to write an array aggregate like
> 
>   (for I in 1 .. 5 => (for J in 1 .. 7 => (if I = J then 1.0 else
> 0.0)))

What kind of name would you pick for the thing?



Georg