Re: [boost] [config] What Feature is this??

Subject: Re: [boost] [config] What Feature is this??
From: Alain Miniussi (Alain.Miniussi_at_[hidden])
Date: 2017-07-24 12:10:40

On 24/07/2017 13:37, Edward Diener via Boost wrote:

> On 7/23/2017 2:50 PM, John Maddock via Boost wrote:
>> Folks, I think I'm looking to add a new C++11 defect macro, but don't 
>> know what the feature is called, nor can I see a way of detecting it 
>> with clang's __has_feature function.
>>
>> The code I want to enable involves function overloading based on a 
>> decltype return type as in:
>
> I never realized that function overloading could occur based on any 
> return type. I always thought it had to be based on the parameter 
> types. Is this part of the C+11 standard ? Where in the standard is 
> this specified ?
The name mangling of the gnu ABI (used by most unix-like) does not 
encode the return type, and the result does not have to be used when the 
function is called.
So if such a functionality is added, the mangling issue alone will hurt 
backward compatibility real bad.