We are having trouble building boost_fusion version 1.61 with Intel compiler (version 17.0) on Linux, and on Windows with vs2015 (and other versions of visual studio).

The problem can be fixed if I made this change to boost/fusion/container/vector/detail/config.hpp :

// Sometimes, MSVC 12 shows compile error with std::size_t of template parameter . #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1800)) \ || BOOST_INTEL /* add this line */ # if defined(BOOST_FUSION_HAS_VARIADIC_VECTOR) # undef BOOST_FUSION_HAS_VARIADIC_VECTOR # endif #endif `BOOST_WORKAROUND(BOOST_INTEL, BOOST_TESTED_AT(xxxx))` is preferred in

Hi Blower, Thank you for reporting. On 11/04/2016 11:27 PM, Blower, Melanie wrote: this case (replace xxxx to known to fail version number, like 1700). However, I can't test because I have no intel compiler on any platform. So, it is great if you open a pull-request, https://github.com/boostorg/fusion/pulls . Thanks, Kohei Takahashi

On Fri, 4 Nov 2016 14:27:01 +0000 "Blower, Melanie" <melanie.blower@intel.com> wrote:

Hello,

We are having trouble building boost_fusion version 1.61 with Intel compiler (version 17.0) on Linux, and on Windows with vs2015 (and other versions of visual studio).

The problem can be fixed if I made this change to boost/fusion/container/vector/detail/config.hpp :

// Sometimes, MSVC 12 shows compile error with std::size_t of template parameter . #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1800)) \ || BOOST_INTEL /* add this line */ # if defined(BOOST_FUSION_HAS_VARIADIC_VECTOR) # undef BOOST_FUSION_HAS_VARIADIC_VECTOR # endif #endif

Symptom on Windows: ile ..\..\..\bin.v2\libs\fusion\test\fold.test\cc848a939769f1f7cf08091b8a228ddb\algorithm\fold.obj.rsp "algorithm\fold.cpp" -Fo"..\..\..\bin.v2\libs\fusion\test\fold.test\cc848a939769f1f7cf08091b8a228ddb\algorithm\fold.obj" -TP /Z7 /Od /Ob0 /W3 /GR /MDd /Zc:forScope /Zc:wchar_t /nologo /Qwn5 /Qwd985 -Qoption,c,--arg_dep_lookup /Qvc14 -Qpchi- /wd4675 /EHs -c -DBOOST_ALL_NO_LIB=1 "-I..\..\.." compile-c-c++ ..\..\..\bin.v2\libs\fusion\test\fold.test\cc848a939769f1f7cf08091b8a228ddb\algorithm\fold.obj

icl @"..\..\..\bin.v2\libs\fusion\test\fold.test\cc848a939769f1f7cf08091b8a228ddb\algorithm\fold.obj.rsp"

fold.cpp ../../../boost/fusion/container/vector/vector.hpp(71): error: namespace "boost::fusion::vector_detail::result_of" has no member "value_at_c" : boost::is_convertible<Sequence, typename result_of::value_at_c<This, 0>::type> ^ detected during: instantiation of class "boost::fusion::vector_detail::is_convertible_to_first<Sequence, This, <unnamed>> [with Sequence=int, This=boost::fusion::vector<int>, <unnamed>=1]" at line 305 instantiation of "boost::fusion::vector<T...>::vector(U &&...) [with T=<int>, U=<int>]" at line 159 of "algorithm\fold.cpp"

Symptom on Linux: The original failure on Linux (zip.test in boost_fusion)

"icpc" -c -xc++ -O0 -g -w1 -inline-level=0 -fPIC -m64 -DBOOST_ALL_NO_LIB=1 -I"../../.." -c -o "../../../bin.v2/libs/fusion/test/zip.test/intl-lnx/dbg/algorithm/zip.o" "algorithm/zip.cpp"

../../../boost/fusion/container/vector/vector.hpp(230): error: pack "U" does not have the same number of elements as "I" : store<I, T>(std::forward<U>(var))... ^ detected during: instantiation of "boost::fusion::vector_detail::vector_data<boost::fusion::detail::index_sequence<I...>, T...>::vector_data(boost::fusion::vector_detail::each_elem, U &&...) [with I=<0UL, 1UL>, T=<boost::fusion::vector_iterator<const boost::fusion::vector<int, int>, 0>, boost::fusion::vector_iterator<const boost::fusion::vector<char, char>, 0>>, U=<const boost::fusion::transform_view<const char>boost::fusion::vector<const boost::fusion::vector<int, int> &, char>const boost::fusion::vector<char, char> &>, char>boost::fusion::detail::poly_begin, boost::fusion::void_> &>]" at char>line 306 instantiation of "boost::fusion::vector<T...>::vector(U char>&&...) [with T=<boost::fusion::vector_iterator<const char>boost::fusion::vector<int, int>, 0>, char>boost::fusion::vector_iterator<const boost::fusion::vector<char, char>char>, 0>>, U=<const boost::fusion::transform_view<const char>char>boost::fusion::vector<const boost::fusion::vector<int, int> char>char>&, const boost::fusion::vector<char, char> &>, char>char>boost::fusion::detail::poly_begin, boost::fusion::void_> char>char>&>]" at line 41 of char>char>"../../../boost/fusion/view/zip_view/zip_view_iterator.hpp"

Thanks and regards, Melanie Blower (I work for Intel on the Intel C++ compiler)

This is disabling variadic vector (which hopefully compiles faster) for all versions of the Intel compiler. This might be the easiest way to fix it since no one has has access to that compiler. I also wanted to mention: - The master branch has numerous updates that should be in Boost 1.63. I think the second case is fixed but its difficult with such little context. - Try `#include <boost/fusion/sequence/intrinsic/value_at.hpp>` before any other includes to fusion for the first issue. The preprocessor output for clang is showing that the required struct is being included very indirectly, so there might be something different on that configuration that is dropping it. Also, the master branch might be worth testing - it uses the tag-dispatched specialization directly so that the `value_at` header never has to be included. Lee