[Qt-interest] Unexpected behaviour for loop

[Malyushytsky, Alex]

It also depends on the compiler you are using,

If it support later standard 'i' will be a local variable which will be destroyed  out of }  scopes after for statement.
You have no body , so it will never is coing to be even initialized

If you had MSVC6 the below code, 'i' would be considered out of scope variable and you would have it initialized anyway



-----Original Message-----
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Parker
Sent: Thursday, May 28, 2009 12:56 AM
To: Andreas Pakulat; qt-interest at trolltech.com
Subject: Re: [Qt-interest] Unexpected behaviour for loop

Heh, that's it.
It seems it was an optimization... thank you :)

----- Original Message -----
From: "Andreas Pakulat" <apaku at gmx.de>
To: <qt-interest at trolltech.com>
Sent: Thursday, May 28, 2009 10:43 AM
Subject: Re: [Qt-interest] Unexpected behaviour for loop


> On 28.05.09 10:28:17, Parker wrote:
>> Hello,
>> I noticed something strange while using the for loop. Here :
>>
>>  for(int i = 1;i < integerList.size();i++)
>> {
>>
>>
>> }
>>
>>
>>
>> "i" should be initialized to 1 and we should enter the loop. But it's not
>> happenig. I debuged, the i variable is just not initialized.
>
> How did you test that? And if you don't have a body in your loop, then
> your compiler may optimize the whole loop out of your application when
> building with optimizations enabled.
>
> Andreas
>
> --
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