------- Additional Comments From ahelm at gmx dot net 2005-05-31 17:41 -------
Subject: Re: C++/C99 standard violation in for loop
At 12:48 31/05/2005, joseph at codesourcery dot com wrote:
>
>------- Additional Comments From joseph at codesourcery dot com 2005-05-31
>11:48 -------
>Subject: Re: New: C++/C99 standard violation in for loop
>
>On Tue, 31 May 2005, ahelm at gmx dot net wrote:
>
>> for(int i=2;i<4;i++)
>> {
>> int j = i;
>> int i;
>> i = 555;
>> printf("%d %d\n", i, j);
>> }
>
>I don't see why you think there's any problem in C99 terms. The for
>statement forms a block (6.8.5#5 first sentence); its body forms a block
>whose scope is a strict subset of that of the for statement (second
>sentence) and the compound statement is itself a block (whether the same
>block or a different one from that of the body as body doesn't matter in
>this case, but if the body is a labeled compound statement then you'd have
>distinct scopes). As these are distinct blocks, they are distinct scopes;
>you can declare i in the block which contains the for statement, and in
>the declaration part of the for statement, and in the body of the for
>statement.
I knew I missed something...
The end of scope description in the "for" chapter, "end of the loop" sounded
rather nebulous to me, that's why I wasn't 100% sure about C99.
Thanks for pointing this out.
Regards,
Tony
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21837
