Re: [boost] [result_of] now uses decltype on release branch

Subject: Re: [boost] [result_of] now uses decltype on release branch
From: Jeffrey Lee Hellrung, Jr. (jeffrey.hellrung_at_[hidden])
Date: 2012-09-05 07:23:46

On Tue, Sep 4, 2012 at 7:56 PM, Joel de Guzman <djowel_at_[hidden]> wrote:

> On 9/5/2012 10:32 AM, Jeffrey Lee Hellrung, Jr. wrote:
>
>> On Tue, Sep 4, 2012 at 7:00 PM, Joel de Guzman <djowel_at_[hidden]> wrote:
>>
>>  On 9/5/2012 9:03 AM, Jeffrey Lee Hellrung, Jr. wrote:
>>>
>>>  On Tue, Sep 4, 2012 at 5:01 PM, Joel de Guzman <djowel_at_[hidden]>
>>>> wrote:
>>>>
>>>   The question is: should we allow SFINAE for result_of. I think now
>>
>>>
>>>>  that we should.
>>>>>
>>>>>
>>>>>  Wouldn't this create a portability problem between C++03 and C++11?
>>>> Or are
>>>> you suggesting this for C++11-only code? Or are you suggesting to
>>>> likewise
>>>> modify result_of in C++03 to allow SFINAE, via something like Eric's
>>>> can_be_called metafunction?
>>>>
>>>>
>>> I don't know. I will not have enough time to follow through with this
>>> anyway
>>> so I'll leave it to the result_of people to "do the right thing". In any
>>> case, I can work out a solution/workaround.
>>>
>>>
>> You can't just make a proposal and then crawl back in your cave :)
>>
>
> I am not making a proposal.
>

"The question is: should we allow SFINAE for result_of. I think now that we
should."

I took that to be a proposal. In any case, it looks like Daniel has taken a
stab at it. I'm not sure if such behavior should be added to result_of
itself or....maybe an entirely different utility should be created, e.g.,
enable_result_of or sfinae_result_of.

- Jeff