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Subject: Re: [boost] [config] What Feature is this??
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2017-07-25 00:19:57

On Tue, Jul 25, 2017 at 2:17 AM, Gavin Lambert via Boost
<boost_at_[hidden]> wrote:
> On 25/07/2017 06:26, Edward Diener wrote:
>> Thanks, John, I just fell asleep by not realizing you were talking about
>> SFINAE ala enable_if etc. I am surprised that any compiler would operate
>> differently in regard to SFINAE between using the C++03 'return-type
>> some_function(etc.)' form and the C++11 'auto some_function(etc.) ->
>> return-type' form, whether decltype was used or not.
> They don't AFAIK, but you can't use the parameter types in an expression
> until after they are actually declared as parameters, thus requiring the
> auto -> form.

To be more precise, you can use parameter *types* but not parameter
*names*. Types are declared by the template<...> prefix.

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