November 2016 - Boost - lists.preview.boost.org

[fusion] trouble building boost fusion with Intel compiler on Windows and Linux
by Blower, Melanie 09 Nov '16

09 Nov '16

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 boost::fusion::vector<const boost::fusion::vector<int, int> &, const boost::fusion::vector<char, char> &>, boost::fusion::detail::poly_begin, boost::fusion::void_> &>]" at line 306 instantiation of "boost::fusion::vector<T...>::vector(U &&...) [with 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 boost::fusion::vector<const boost::fusion::vector<int, int> &, const boost::fusion::vector<char, char> &>, boost::fusion::detail::poly_begin, boost::fusion::void_> &>]" at line 41 of "../../../boost/fusion/view/zip_view/zip_view_iterator.hpp" Thanks and regards, Melanie Blower (I work for Intel on the Intel C++ compiler)

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test: Initializiation of data test cases
by Florian Lindner 09 Nov '16

09 Nov '16

Hello, I would like to use data test cases. The problem that comes with that, is that I want to use objects that needs the application to be initialized before they are instantiated. Example is that an object that uses MPI needs to habe MPI_Init called before. This example code shows the order in which different hooks are run: #define BOOST_TEST_DYN_LINK // #define BOOST_TEST_MAIN #include <boost/test/unit_test.hpp> #include <boost/test/data/test_case.hpp> #include <boost/test/data/monomorphic.hpp> #include <mpi.h> #include <iostream> #include <string> #include <vector> using namespace std; struct GlobalFixture { GlobalFixture() { cout << "GlobalFixture" << endl; } ~GlobalFixture() { } }; BOOST_GLOBAL_FIXTURE(GlobalFixture); struct Test : public std::string { // derive from string to get operator<< that boost requires Test() { cout << "Object to test" << endl; } }; namespace bdata = boost::unit_test::data; template <class T> class RuntimeDataset { public: using sample = typename T::value_type;; enum { arity = 1 }; T data; explicit RuntimeDataset(T _data) { cout << "Dataset constructor" << endl; data = _data; } bdata::size_t size() const { return data.size(); } typename T::const_iterator begin() const { return data.cbegin(); } }; namespace boost { namespace unit_test { namespace data { namespace monomorphic { template <class T> struct is_dataset<RuntimeDataset<T>> : boost::mpl::true_ {}; }}}} struct Fixture { Fixture() { cout << "Fixture" << endl; } }; BOOST_AUTO_TEST_SUITE(MySuite) BOOST_DATA_TEST_CASE_F( Fixture, test1, RuntimeDataset<std::vector<Test>>( { Test() } ), // This should be evaluated when the test is about to run input) { BOOST_TEST(true); cout << "Data test case" << endl; } BOOST_AUTO_TEST_SUITE_END() // initialization function: bool init_unit_test() { cout << "init_unit_test" << endl; return true; } // entry point: int main(int argc, char* argv[]) { cout << "main" << endl; int retCode = boost::unit_test::unit_test_main( &init_unit_test, argc, argv ); return retCode; } I've removed some code parts, but it should compile right away using mpic++ -std=c++11 -lboost_unit_test_framework boosttesting.cpp Its output is Object to test Dataset constructor main init_unit_test GlobalFixture Running 1 test case... Fixture Data test case *** No errors detected So, before I have any chance to do my own initialization code, the Test object and the dataset is constructed. I have posted this to the user mailing list, but still looking for a way to work around that. Do you have any idea how I can do initialization before data is instantiated? Thanks, Florian

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cross-compiling linux->osx: file was built for archive which is not the architecture being linked (x86_64)
by Frédéric Bron 09 Nov '16

09 Nov '16

I am trying to cross-compile for osx from linux using clang. When I build boost, I use the following: CC="x86_64-apple-darwin13-clang" CFLAGS="-O2 -DNDEBUG" CXX="x86_64-apple-darwin13-clang++-libc++" CXXFLAGS="-O2 -DNDEBUG -std=c++14" AR="x86_64-apple-darwin13-ar" AS="x86_64-apple-darwin13-as" RANLIB="x86_64-apple-darwin13-ranlib" ./bootstrap.sh --without-icu --prefix=/softs/usr/darwin13-clang/release/boost --with-toolset=clang Then I use the following user-config.jam: using clang : : x86_64-apple-darwin13-clang++-libc++ : <cxxflags>-std=c++14 ; with the following command: ./b2 -d2 -j8 --layout=system --user-config=user-config.jam --without-mpi --without-python --without-context --without-coroutine link=static threading=multi runtime-link=shared target-os=darwin threadapi=pthread address-model=64 define=BOOST_THREAD_USE_LIB define=BOOST_LOG_WITHOUT_EVENT_LOG variant=release install Apart from a few errors, everythings looks fine: ...failed updating 3 targets... ...skipped 3 targets... ...updated 13684 targets... However, when I link against the static libraries that have been built, I get this type of messages: ld: warning: ignoring file /softs/usr/darwin13-clang/release/boost/lib/libboost_system.a, file was built for archive which is not the architecture being linked (x86_64): /softs/usr/darwin13-clang/release/boost/lib/libboost_system.a I suspect that it is because the wrong ar and ranlib where used because I find in my log that b2 used "ar" and "ranlib" instead of "x86_64-apple-darwin13-ar" and "x86_64-apple-darwin13-ranlib". So I changed my user-config.jam to: using clang : : x86_64-apple-darwin13-clang++-libc++ : <cxxflags>-std=c++14 <archiver>x86_64-apple-darwin13-ar <ranlib>x86_64-apple-darwin13-ranlib ; but b2 is still using "ar" and "ranlib". Any idea of what my problem is? Frédéric

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Support for fixed point arithmetic in Boost?
by Juan Dent 08 Nov '16

08 Nov '16

Hi, Sorry if this is a dumb question but I have been looking for fixed point types in Boost and not found any... Yet I feel there must be... Thanks for any help Juan

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Fw: Build failed: smart_ptr 1.0.31-develop
by Peter Dimov 08 Nov '16

08 Nov '16

I'm getting a weird error from the CI: https://ci.appveyor.com/project/pdimov/smart-ptr/build/1.0.31-develop C:/projects/boost-root/tools/build/src\build-system.jam:982: in load *** argument error * rule boostcpp.post-build ( ok ? ) * called with: ( ok ok ) * extra argument ok C:/projects/boost-root\boostcpp.jam:513:see definition of rule 'boostcpp.post-build' being called C:\projects\boost-root\tools\build\src/kernel\modules.jam:295: in import C:\projects\boost-root\tools\build\src/kernel/bootstrap.jam:139: in boost-build C:\projects\boost-root\boost-build.jam:17: in module scope Command exited with code 1 This is Submodule path 'tools/build': checked out '32113ca3ddbc637d08e85c44502f3149d37323e0'

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[process] The Formal review preiod is nearing the end
by Antony Polukhin 07 Nov '16

07 Nov '16

Dear Boost community, The formal review of Klemens David Morgenstern's Process library ends on 5th November. If you're willing to write a review - please hurry up! If you're willing to write the review but could not make it on time - please give a hint. In that case it is possible to postpone the final decision for a few days. Thanks in advance! -- Best regards, Antony Polukhin

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[process] Formal review has ended
by Antony Polukhin 07 Nov '16

07 Nov '16

The library review has ended. I will need a few more days to calculate the votes and to wait for some people that spend a lot of time to make their vote more explicit. At this point, following people voted: * Johannes * Niall Douglas * Tom Kent * Paul A. Bristow * Bjorn Reese * Edward Diener * Boris Schäling If I've missed someone, please notify me. -- Best regards, Antony Polukhin

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[iostreams] Last develop commit breaks release builds.
by Rene Rivera 07 Nov '16

07 Nov '16

FYI.. This commit: < https://github.com/boostorg/iostreams/commit/0a87de8932641a3896f49872a3c034… > Is causing release build errors. See the CI logs for details.. <https://circleci.com/gh/boostorg/boost/2190> Please address ASAP. -- -- Rene Rivera -- Grafik - Don't Assume Anything -- Robot Dreams - http://robot-dreams.net -- rrivera/acm.org (msn) - grafikrobot/aim,yahoo,skype,efnet,gmail

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[config] std::shuffle support
by Edward Diener 07 Nov '16

07 Nov '16

Does Boost config currently have a macro to determine whether the c++11 std::shuffle algorithm is supported for a particular compiler ? If not supporting /std:c++latest by changing std::random_shuffle to std::shuffle will not be possible for c++03 libraries.

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interest in structure of arrays container?
by Michael Marcin 06 Nov '16

06 Nov '16

Structure of arrays is a pretty well known pattern for improving memory density and enabling vectorization in high performance code. Also known as parallel arrays[1]. After hand-rolling yet another of these it occurred to me that you make a reasonable first implementation with a simple alias template. template< typename... Ts > using soa = std::tuple< std::vector<Ts>... >; example: soa<int,float,std::string> data; This is decent start but has several issues including: * nothing to preserve the invariant keeping the arrays the same length * missing coalesced interface for vector methods (size, reserve, etc) * no iterator * wasted storage for duplicated allocators, capacities, sizes * sizeof...(Ts) allocations could be a single large block The work required to address these issues is not too great I think. Potential names: soa<Ts> structure_of_arrays<Ts> parallel_array<Ts> struct_array<Ts> parallel_vector<Ts> struct_vector<Ts> Does this already exist somewhere? Does it seem useful? [1]https://en.wikipedia.org/wiki/Parallel_array

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