No longer works with Visual Studio 2017

[emptyVoid]

I've just updated to VS 15.5 (toolset 14.12), and no longer able to build projects which use the variant.
Here're the errors (in case it helps):

C3528	'Is': the number of elements in this pack expansion does not match the number of elements in 'Js'	...\mpark\variant.hpp	575
C2672	'mpark::detail::visitation::base::make_farray': no matching overloaded function found	cvtest	...\mpark\variant.hpp	574
C2893	Failed to specialize function template 'mpark::lib::cpp14::array<std::common_type<std::decay<Fs>::type...>::type,sizeof...(Fs)> mpark::detail::visitation::base::make_farray(Fs &&...)'	...\mpark\variant.hpp	575
C2672	'mpark::detail::visitation::base::at': no matching overloaded function found	...\mpark\variant.hpp	629
C2784	'const remove_all_extents<T>::type &mpark::detail::visitation::base::at(const mpark::lib::cpp14::array<T,N> &,::size_t,Is...)': could not deduce template argument for 'const mpark::lib::cpp14::array<T,N> &' from 'void'	...\mpark\variant.hpp	633
C2780	'const T &mpark::detail::visitation::base::at(const T &)': expects 1 arguments - 2 provided	...\mpark\variant.hpp	633

[mpark]

Thanks for the report! I'll look into this today.

[ltjax]

I got the same error! Any idea what's causing this?
I tried with Tag v1.2.0 and today's master

[mpark]

It seems like it's having trouble with the cartesian product generation here: https://github.com/mpark/variant/blob/master/include/mpark/variant.hpp#L574-L575

I'll have to play with whether I need to reformulate this for MSVC or if there's some way to coax it to understand it.

[mpark]

Closed by 2bb35f1