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From: jpwoodruff <jpwoodruff@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Simple Warnings Needs
Date: Wed, 23 Feb 2011 15:07:16 -0800 (PST)
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Date: 2011-02-23T15:07:16-08:00
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On Feb 23, 11:56=A0am, mockturtle <framefri...@gmail.com> wrote:
> On Wednesday, February 23, 2011 7:52:37 PM UTC+1, Rego wrote:
> > I would like to know (in more details than gnat documentation) the crit=
icality of these warnings options:
> > =A0** "-gnatwd" (Implicit dereferencing)
> > =A0** "-gnatwf" (Unreferenced formals)
> > =A0** "-gnatwh" (Hiding)
> > =A0** "-gnatwm" (Modified but unreferenced variables)
> > =A0** "-gnatwk" (Variables that could be constants)
>

>
> About "-gnatwf" (Unreferenced formals), "-gnatwm" (Modified but unreferen=
ced variables) =A0I think that the idea is to warn about "strange" construc=
t: why did you modify that variable if you are not reading it again? =A0Thi=
s is strange and maybe it is the consequence of an error. =A0Again, the ris=
k is having a program with a bug rather than a security threat.
>

I think I'd like these if I were "adjusting" some old code.  Suppose I
added a requirement to some good quality code.  I'll look for the
warning when I'm done modifying, so I'll see if I left some artifact
that should have been considered when I modify.

John