[Harbour] -w3 optimizazion issue

[Mike Evans (Gmail)]

Hi Lorenzo,
I think that in this example the warning is ok. You never used this
variable. As I can understand a variable is used only if it's a right
opponent of an expression or a function parameter (at least on first level
optimization).

Brgds
Mike Evans

-----Original Message-----
From: harbour-bounces at harbour-project.org
[mailto:harbour-bounces at harbour-project.org] On Behalf Of Lorenzo Fiorini
Sent: Wednesday, January 07, 2009 7:05 PM
To: Harbour Project Main Developer List.
Subject: [Harbour] -w3 optimizazion issue

function main
local nVar := 0
nVar++
return nil

In the code above harbour returns:
testopt.prg:2:MAIN warning: W0032  Variable 'NVAR' is assigned but not
used in function '2:MAIN'

if I "fix" the warning removing ":= 0" with:

function main
local nVar
nVar++
return nil

I get no more messages but I the code stops with a RT error at line 3.

Is there any way to detect such situation?

best regards,
Lorenzo
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