Concept-check bug ?

[Peter Dimov]

Gabriel Dos Reis wrote:
> Jonathan Wakely <cow@compsoc.man.ac.uk> writes:
>
>> On Fri, Jun 17, 2005 at 03:12:40PM +0300, Peter Dimov wrote:
>>
>>> Jonathan Wakely wrote:
>>>> Hi y'all,
>>>>
>>>>   #define _GLIBCXX_CONCEPT_CHECKS
>>>>   #include <vector>
>>>>
>>>>   struct A {
>>>>       std::vector<A> v;
>>>>   };
>>>>
>>>> This produces concept-check errors because A is incomplete at the
>>>> point of declaring v.
>>>>
>>>> Is this code really illegal, or just a flaw in the concept-checks ?
>>>
>>> It's illegal (17.4.3.6/2 last bullet), but useful.
>>
>> Thanks, Peter (I should have known that).
>>
>> Presumably the truly legal way to do it is with a (smart) pointer to
>> the
>
> Probably "legal", but surely overkill and obfuscatory.

We all believe that this is a defect; no need to argue. Just submit that 
issue already. ;-)