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From: Jean-Pierre Rosen <rosen@adalog.fr>
Newsgroups: comp.lang.ada,comp.lang.vhdl
Subject: Re: Embedded languages based on early Ada (from "Re: Preferred OS,
 processor family for running embedded Ada?")
Date: Thu, 01 Mar 2007 10:18:30 +0100
Organization: Adalog
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Xref: g2news2.google.com comp.lang.ada:9617 comp.lang.vhdl:7576
Date: 2007-03-01T10:18:30+01:00
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Colin Paul Gloster a �crit :
> procedure Ada_Is_As_Unsafe_As_VHDL_And_GNAT_Will_Not_Even_Warn is
>    value,Y:Integer;
> begin
>    if False then
>       Value:=0;
>    end if;
>    Y:=Value;
> end Ada_Is_As_Unsafe_As_VHDL_And_GNAT_Will_Not_Even_Warn;
>    --GNAT is an abbreviation of "the GNU Ada Translator".
> 
> I do not know Modula-3 and Oberon. Do they allow such a trivially
> detectable accident?
> 

Here is what AdaControl says about it:
Error: IMPROPER_INITIALIZATION: use of uninitialized variable: Value
Error: IMPROPER_INITIALIZATION: variable "value" used before 
initialisation>

NB: I think this kind of analysis is for external tools, not for 
compilers. Nice when compilers can provide extra warnings, but that's 
not their primary job.
-- 
---------------------------------------------------------
            J-P. Rosen (rosen@adalog.fr)
Visit Adalog's web site at http://www.adalog.fr