Subject: Re: [boost] Is there BOOST_ENABLE_IF macro now?
From: TONGARI J (tongari95_at_[hidden])
Date: 2013-08-19 11:39:12
2013/8/19 Mathias Gaunard <mathias.gaunard_at_[hidden]>
> On 18/08/13 22:16, paul Fultz wrote:
>
>> From: TONGARI J
>>> Hi folks,
>>>
>>> It's over 2 years since this post:
>>> http://boost.2283326.n4.**nabble.com/New-powerful-way-**
>>> to-use-enable-if-in-C-0x-**td3442723.html<http://boost.2283326.n4.nabble.com/New-powerful-way-to-use-enable-if-in-C-0x-td3442723.html>
>>>
>>> The macro looks sweet and I wonder if we have this macro in Boost in case
>>> that I missed it.
>>>
>>>
>> This is nice for C++11 and conversion operators
>>
>
> AFAIK this is indeed the only way to constrain template conversion
> operators with SFINAE.
> This is the real use of that trick. But why not just use that trick
> explicitly in that context?
If we have a general way to do it, why would we bother ourselves writing
specific code in different contexts?
I think the power of abstraction is to let us forget the details, and
everything has trade off, put it on the scales, the writability weighs more
to me.