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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.

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