[Bug c++/21837] C++/C99 standard violation in for loop

["ahelm at gmx dot net" <gcc-bugzilla at gcc dot gnu dot org>]

------- 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



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21837