Re: [boost] quince: queries in C++ expressions

Subject: Re: [boost] quince: queries in C++ expressions
From: Damien Buhl (damien.buhl_at_[hidden])
Date: 2014-07-21 14:53:51

On 07/21/2014 02:34 PM, Agustín K-ballo Bergé wrote:
> On 21/07/2014 08:01 a.m., Michael Shepanski wrote:
>> On 21/07/2014 6:53 PM, Mathias Gaunard wrote:
>>> On 15/07/14 14:45, Michael Shepanski wrote:
>>>
>>>> Could you clarify what you mean by "do this"?  QUINCE_MAP_CLASS
>>>> builds a
>>>> class with exactly the data members, function members, and bases that
>>>> quince requires.
>>>
>>> Boost.Fusion defines tuple concepts, and provides utilities to adapt a
>>> class to a tuple (or define a class and adapt it at the same time).
>>>
>>> To maximize compatibility, and to prevent users having to say that
>>> their structure is tuple-like a billion times, it's better to reuse
>>> this.
>>
>> I see that BOOST_FUSION_ADAPT_STRUCT asks users to repeat the members'
>> types, in a way that QUINCE_MAP_CLASS doesn't. (Why is that, btw?)
> 
> Because Fusion supports C++98. That said, there's work being done on a
> branch to add member type deduction via `decltype` to all ADAPT macros.

Just to note that the new macros doesn't disable the C++98 compatibility
as it uses Boost.TypeOf, the emulation just work fine with C++98
compilers, and it's still possible to provide the types, as you suggested.

off-topic: I'll bring the missing macros soon, I'm late on schedule. :/

> 
> Regards,