Re: [boost] [type_traits] has_equal_to< std::vector<T> > always true_

Subject: Re: [boost] [type_traits] has_equal_to< std::vector<T> > always true_
From: Vicente J. Botet Escriba (vicente.botet_at_[hidden])
Date: 2012-04-25 16:14:55

Le 25/04/12 20:17, Jeffrey Lee Hellrung, Jr. a écrit :
> On Wed, Apr 25, 2012 at 10:28 AM, Vicente J. Botet Escriba<
> vicente.botet_at_[hidden]>  wrote:
>
>>
>> Why do you need to specialize this trait for STL containers? Do you mean
>> that has_equal_to doesn't work for them? if no why?
>>
>> Sorry if this is something obvious.
>>
> As far as I've gathered, typical STL implementations won't "guard" the
> declaration of vector's operator== with something like Boost.EnableIf, so
> vector<X>  is always reported as having an operator== regardless of what X
> is.
Oh, I see now. I had the same issue while implementing is_assignable ;-)

Thanks,
Vicente