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Re: Concept-check bug ?
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
vector type:
struct A {
std::tr1::shared_ptr<std::vector<A> > v;
A() : v(new std::vector<A>) { }
};
jon
--
"You're not drunk if you can lie on the floor without holding on."
- Dean Martin