Re: [boost] C++17 detection

Subject: Re: [boost] C++17 detection
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2017-09-12 00:22:06

On Tue, Sep 12, 2017 at 3:15 AM, Stephan T. Lavavej via Boost
<boost_at_[hidden]> wrote:
> [Gavin Lambert]
>> __cplusplus gives you the claimed conformance level of the compiler,
>> which is usually (though not necessarily) in agreement with the STL.
>> But that doesn't do you a lot of good as it's a big catch-all
>> (and at least in the case of MSVC lags behind the actual individual feature support).
>
> That's intentional. If we were to update __cplusplus's value before completing C++11 (not to mention C++14/17), the Internet would riot.

Well, MSVC never implemented C++98/03 completely, yet I think it
defined __cplusplus as if it did. I don't think __cplusplus ever did
provide any practical indication of the supported language and
therefore its value doesn't matter much.