Hello, We came across a compiler error with Boost version 1.70.0 b1 when compiling via MSVC 1916, C++17 standard and the "/Zc:noexceptTypes-" compiler flag set. The resulting error is of type: boost\type_traits\detail\is_member_function_pointer_cxx_11.hpp(359): error C2953: 'boost::is_member_function_pointer<Ret(__cdecl C::* )(Args...)>': class template has already been defined boost\type_traits\detail\is_member_function_pointer_cxx_11.hpp(48): note: see declaration of 'boost::is_member_function_pointer<Ret(__cdecl C::* )(Args...)>' A corresponding issue was created here: https://github.com/boostorg/type_traits/issues/118 We're wondering of the chances of getting this fixed with the final 1.70 release and if possible would like to get priority on a fix. Thanks for your time! Kind regards, Thomas Wollenzin ___________ Crytek GmbH / Hugo-Junkers-Strasse 3, 60386 Frankfurt am Main / HR B 77322 Amtsgericht Frankfurt am Main / Geschäftsführer/Managing Directors: Avni Yerli, Faruk Yerli, Ahmet Sahin / VAT-ID DE20432461 / www.crytek.com