Boost 1.70.0 compile errors in VS2017 x86 /std:c++17 /clr

[codingdave]

Hi,

I get compiler errors when trying to compile with 32 bit and CLR using Visual Studio 2017:

libraries\boost\type_traits\detail\is_function_cxx_11.hpp(388): warning C4561: '__fastcall' incompatible with the '/clr' option: converting to '__stdcall'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(388): error C2953: 'boost::is_function<Ret(Args...) noexcept>': class template has already been defined
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(386): note: see declaration of 'boost::is_function<Ret(Args...) noexcept>'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(403): warning C4561: '__fastcall' incompatible with the '/clr' option: converting to '__stdcall'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(403): error C2953: 'boost::is_function<Ret(Args...) noexcept const>': class template has already been defined
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(401): note: see declaration of 'boost::is_function<Ret(Args...) noexcept const>'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(418): warning C4561: '__fastcall' incompatible with the '/clr' option: converting to '__stdcall'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(418): error C2953: 'boost::is_function<Ret(Args...) noexcept volatile>': class template has already been defined
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(416): note: see declaration of 'boost::is_function<Ret(Args...) noexcept volatile>'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(433): warning C4561: '__fastcall' incompatible with the '/clr' option: converting to '__stdcall'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(433): error C2953: 'boost::is_function<Ret(Args...) noexcept volatile const>': class template has already been defined
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(431): note: see declaration of 'boost::is_function<Ret(Args...) noexcept volatile const>'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(449): warning C4561: '__fastcall' incompatible with the '/clr' option: converting to '__stdcall'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(449): error C2953: 'boost::is_function<Ret(Args...) noexcept &>': class template has already been defined
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(447): note: see declaration of 'boost::is_function<Ret(Args...) noexcept &>'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(464): warning C4561: '__fastcall' incompatible with the '/clr' option: converting to '__stdcall'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(464): error C2953: 'boost::is_function<Ret(Args...) noexcept const &>': class template has already been defined
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(462): note: see declaration of 'boost::is_function<Ret(Args...) noexcept const &>'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(479): warning C4561: '__fastcall' incompatible with the '/clr' option: converting to '__stdcall'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(479): error C2953: 'boost::is_function<Ret(Args...) noexcept volatile &>': class template has already been defined
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(477): note: see declaration of 'boost::is_function<Ret(Args...) noexcept volatile &>'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(494): warning C4561: '__fastcall' incompatible with the '/clr' option: converting to '__stdcall'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(494): error C2953: 'boost::is_function<Ret(Args...) noexcept volatile const &>': class template has already been defined
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(492): note: see declaration of 'boost::is_function<Ret(Args...) noexcept volatile const &>'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(510): warning C4561: '__fastcall' incompatible with the '/clr' option: converting to '__stdcall'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(510): error C2953: 'boost::is_function<Ret(Args...) noexcept &&>': class template has already been defined
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(508): note: see declaration of 'boost::is_function<Ret(Args...) noexcept &&>'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(525): warning C4561: '__fastcall' incompatible with the '/clr' option: converting to '__stdcall'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(525): error C2953: 'boost::is_function<Ret(Args...) noexcept const &&>': class template has already been defined
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(523): note: see declaration of 'boost::is_function<Ret(Args...) noexcept const &&>'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(540): warning C4561: '__fastcall' incompatible with the '/clr' option: converting to '__stdcall'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(540): error C2953: 'boost::is_function<Ret(Args...) noexcept volatile &&>': class template has already been defined
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(538): note: see declaration of 'boost::is_function<Ret(Args...) noexcept volatile &&>'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(555): warning C4561: '__fastcall' incompatible with the '/clr' option: converting to '__stdcall'
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(555): error C2953: 'boost::is_function<Ret(Args...) noexcept volatile const &&>': class template has already been defined
libraries\boost\type_traits\detail\is_function_cxx_11.hpp(553): note: see declaration of 'boost::is_function<Ret(Args...) noexcept volatile const &&>'

[codingdave]

The PR fixes the issue on my side.

[rcdailey]

I can confirm this issue exists on vs2019 using boost version 1.70.0. The above patch (https://github.com/codingdave/type_traits/commit/ff1a2967b3ca68a6f8fb229c5ad9bc2cfbeb2852) does fix the issue for me.

[yoavmil]

I have a similar issue. c++17, mcvs19, boost 1.73, x64.

include\boost\polygon\voronoi_builder.hpp(160,18): error C7626: unnamed class used in typedef name cannot declare members other than non-static data members, member enumerations, or member classes

couldn't solve it. rolling back to c++14.

[glenfe]

@yoavmil That issue in Boost.Polygon was fixed in develop but not merged to master for the 1.74 release: boostorg/polygon@5cfcb6c

I'll merge it for the 1.75 release.

[yoavmil]

Great. thanks for the quick answer

[mw4853]

The patch that @codingdave put up isn't quite correct. It will fix the issue for .NET Framework C++/CLI projects, but not for .NET Core C++/CLI projects.

See:
Issue: #148
PR: #149