MSVC 15.7.6 breaks QtPrivate::FunctionPointer for noexcept functions

Since msvc 15.7.6, in

/std:c++latest

or

/std:c++17

mode, noexcept is part of the type system.

However, msvc does not define __cpp_noexcept_function_type. This makes expressions such as : 

void f(int x) noexcept { } 
using t1 = QtPrivate::FunctionPointer<decltype(&f)>::Arguments;

unable to compile.

This was discussed a bit here for reference : https://github.com/woboq/verdigris/issues/43