Re: [boost] [qvm] deduce_xx traits wouldn't introduce ODR issues.

Subject: Re: [boost] [qvm] deduce_xx traits wouldn't introduce ODR issues.
From: Emil Dotchevski (emildotchevski_at_[hidden])
Date: 2015-12-23 15:09:08

On Wed, Dec 23, 2015 at 6:24 AM, Adam Wulkiewicz <adam.wulkiewicz_at_[hidden]>
wrote:

> Vicente J. Botet Escriba wrote:
>
>> Le 10/12/2015 08:30, Emil Dotchevski a écrit :
>>
>>> On Wed, Dec 9, 2015 at 10:36 PM, Vicente J. Botet Escriba <
>>> vicente.botet_at_[hidden]> wrote:
>>>
>>> Le 10/12/2015 00:15, Emil Dotchevski a écrit :
>>>>
>>>> On Wed, Dec 9, 2015 at 2:51 PM, Vicente J. Botet Escriba <
>>>>> vicente.botet_at_[hidden]> wrote:
>>>>>
>>>>> The problem appear when two such programmers do it (think of 3pp).
>>>>
>>>> If within one program two programmers introduce two different
>>>> definitions
>>>>
>>> under the same name, yes you have ODR but that is hardly a library
>>> problem.
>>> :)
>>>
>>>
>>> Hmm. This is a library issue, because the library provides an interface
>> that allows to configure types that don't know each other by two different
>> parts.
>>
>> TBoost.Conversion was rejected exactly by this reason.
>>
>
> This indeed is an important point, unfortunately I cannot take it into
> account because it wasn't mentioned in any review.
> Vincente, do you plan to write one?
>

If the problem is that QVM allows you to specialize a type template, and
that it is possible for two programmers to introduce two different
definitions for the same specialization, how is that a library issue? If
that's a problem then we can't allow any templates in any library
interface, which seems odd.

Emil