Re: [boost] Boost.Conversion review

Subject: Re: [boost] Boost.Conversion review
From: Vicente J. Botet Escriba (vicente.botet_at_[hidden])
Date: 2011-08-22 13:38:21

Le 22/08/11 09:19, Gordon Woodhull a écrit :
> Hi Vicente,
>
> On Aug 21, 2011, at 6:31 AM, Vicente J. Botet Escriba wrote:
>> I have added a section to the documentation containing a possible approach that could address this issue.
>>
>> I have added it below.
>>
>> Best,
>> Vicente
>>
>> How can libraries define and use conversions between unrelated types?
> Do I understand that there would be the same problem and possible solution for an overloadable static_cast?
>
> I think the rule you're proposing could be summarized as: the end user must choose which conversions are defined.  Thus,
> 1. The end user can define and use conversions in any way as long as they heed the ODR.
> 2. Libraries can define conversions only in headers, and they can't cause those headers to be included.
> 3. Libraries can use conversions, but only in header-only code that is not used by cpp's.  (Actually #2 already ensures this, because the cpp would not compile without including conversion definition headers.)
>
> Does this cover it?
>
>
Hi,

your sumary is a good resume of my proposal.

Best,
Vicente