BOOST_FUSION_ADAPT_STRUCT doesn't work with empty struct on Visual Studio

[Benoit Blanchon <benoit@…>]

The following code works fine on GCC and Clang:

#include <boost/fusion/adapted/struct/adapt_struct.hpp>

class EmptyStruct {};

BOOST_FUSION_ADAPT_STRUCT(EmptyStruct);

int main() {}

But on Visual Studio 2015 Update 3, it gives the following error:

error C2220: warning treated as error - no 'object' file generated
warning C4003: not enough actual parameters for macro 'BOOST_PP_SEQ_DETAIL_IS_NOT_EMPTY'
warning C4003: not enough actual parameters for macro 'BOOST_PP_SEQ_DETAIL_EMPTY_SIZE

[Kohei Takahashi]

dup of #6592

[Edouard]

It's not a duplicate, the feature has been added, it's just not supported in VS.

[Joel de Guzman]

Reopened this one. This is specific to VS. I'm not so sure about the other one. #6592

[Kohei Takahashi]

Replying to Edouard:

It's not a duplicate, the feature has been added, it's just not supported in VS.

If so, should #6592 be closed, right?

[Joel de Guzman]

Yes, I think #6592 is obsolete.

[Benoit Blanchon <benoit@…>]

Well, #6592 is only partially obsolete.

Even if BOOST_FUSION_ADAPT_STRUCT accepts an empty struct, BOOST_FUSION_DEFINE_STRUCT still doesn't.