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Subject: Re: [boost] Let's stop distributing binaries
From: Stephan T. Lavavej (stl_at_[hidden])
Date: 2018-08-31 18:27:41

> How exactly will the changing VS standard header files compile without C++17 being the 15.9.x default?

VS 2017 15.9 will *not* change the Standard mode default to C++17. It will remain at C++14 for that update.

MSVC's STL supports being compiled in both C++14 and C++17 mode; we sense the Standard mode and adapt our code accordingly. We use "if constexpr" internally to improve throughput because MSVC and Clang support it in C++14 mode with a disable-able warning. (We have an escape hatch, which we reserve the right to remove at any time without notice.)

Stephan T. Lavavej
Principal Software Engineer, Visual C++ Libraries

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