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Help with understanding regression test results
by Andrzej Krzemienski 01 Jul '14

01 Jul '14

Hi, Recently I observed lots of test cases showing as failed in regression tests on branch 'develop' in Boost.Optional: http://www.boost.org/development/tests/develop/developer/optional.html When I try to inspect the results they are either empty or refer to the places in the code that do not exist anymore in branch 'develop', as though the test environments were using partial results of GIT commits. But the test dates are after the last commit, so it looks like something is broken with the testing framework. Anyone can help me with figuring out what to do? Regards, &rzej

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[fusion] Definition for FUSION_MAX_MAP_SIZE
by Edward Diener 01 Jul '14

01 Jul '14

The documentation for fusion implies that FUSION_MAX_MAP_SIZE is defined whenever a fusion header is included. is this so ? Testing this out under Wave suggests it is not so. What fusion header needs to be included in order to bring in the definition for FUSION_MAX_MAP_SIZE ?

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Intel 14.0.1 error with boost::bind
by Aniket Pugaonkar 01 Jul '14

01 Jul '14

Hi, I am using a test program for compiling a boost::bind in Intel MIC(Xeom Phi). Here are the details of the code and platform on which it is compiled. I am using thread building blocks in my code, but the following code does not contain any TBB threads. The errors in my test code below and original code are same. Compiler : Intel 13.0.1 / intel 14.0.1 SP1 Update 3 (latest from intel composer XE trial version) I am using our lab's compiler installed on a cluster. The TBB is installed in my home directory. boost 1.55 is also installed in my home location. Compiled for MIC: icpc -mmic -L/home/aniketnp/tbb42_20140122oss/lib/mic -std=c++11 -I/home/aniketnp/boost_1_55_0 -I/home/aniketnp/tbb42_20140122oss/include test.cpp Scenario: a functor takes 2 arguments in its operator()() by using a boost::bind() method. The operator()() method contains a function which uses comparisons ( < or > ) using if-else logic. The error pops up here. Here is the following code. #include <iostream> #include <boost/bind.hpp> using namespace std; struct Info_t { int start; int end; Info_t(int s=0,int e=0) : start(s), end(e) { } }; template <typename T, typename time> void process_info(const T& info1, const T& info2, const time& t) { //the below gives compiler error * if ((info1.start < info2.end) && (info2.end > info1.end) && (info1.end < info2.start) )* std::cout << "yess error with mic" << std::endl; //the below if works fine if ((info1.start < info2.end) && (info2.end > info1.end)) std::cout << "no error at all" << std::endl; } template<typename Time> struct my_functor { public: my_functor() { } my_functor(Time& time_) : time(time_) { } typedef void result_type; template<typename info_t> void operator()(const info_t& info1, const info_t& info2) { const auto& i1 = info1; const auto& i2 = info2; process_info<info_t, Time> (i1,i2, time); } private: Time& time; }; int main() { Info_t i1(10,2); Info_t i2(2,10); int t = 1; auto func = boost::bind( my_functor<int>(t), _1, _2 ); func(i1,i2); return 0; } test.cpp(16): error: expression must have a constant value if ((info1.start < info2.end) && (info2.end > info1.end) && (info1.end < info2.start) ) ^ detected during: instantiation of "void my_functor<Time>::operator()(const info_t &, const info_t &) [with Time=int, info_t=Info_t]" at line 313 of "/home/aniketnp/boost_1_55_0/boost/bind/bind.hpp" instantiation of "void boost::_bi::list2<A1, A2>::operator()(boost::_bi::type<void>, F &, A &, int) [with A1=boost::arg<1>, A2=boost::arg<2>, F=my_functor<int>, A=boost::_bi::list2<Info_t &, Info_t &>]" at line 61 of "/home/aniketnp/boost_1_55_0/boost/bind/bind_template.hpp" instantiation of "boost::_bi::bind_t<R, F, L>::result_type boost::_bi::bind_t<R, F, L>::operator()(A1 &, A2 &) [with R=boost::_bi::unspecified, F=my_functor<int>, L=boost::_bi::list2<boost::arg<1>, boost::arg<2>>, A1=Info_t, A2=Info_t]" at line 48 test.cpp(16): error: this operator is not allowed in a template argument expression if ((info1.start < info2.end) && (info2.end > info1.end) && (info1.end < info2.start) ) ^ detected during: instantiation of "void my_functor<Time>::operator()(const info_t &, const info_t &) [with Time=int, info_t=Info_t]" at line 313 of "/home/aniketnp/boost_1_55_0/boost/bind/bind.hpp" instantiation of "void boost::_bi::list2<A1, A2>::operator()(boost::_bi::type<void>, F &, A &, int) [with A1=boost::arg<1>, A2=boost::arg<2>, F=my_functor<int>, A=boost::_bi::list2<Info_t &, Info_t &>]" at line 61 of "/home/aniketnp/boost_1_55_0/boost/bind/bind_template.hpp" instantiation of "boost::_bi::bind_t<R, F, L>::result_type boost::_bi::bind_t<R, F, L>::operator()(A1 &, A2 &) [with R=boost::_bi::unspecified, F=my_functor<int>, L=boost::_bi::list2<boost::arg<1>, boost::arg<2>>, A1=Info_t, A2=Info_t]" at line 48 test.cpp(16): error: expected a ">" if ((info1.start < info2.end) && (info2.end > info1.end) && (info1.end < info2.start) ) ^ detected during: instantiation of "void my_functor<Time>::operator()(const info_t &, const info_t &) [with Time=int, info_t=Info_t]" at line 313 of "/home/aniketnp/boost_1_55_0/boost/bind/bind.hpp" instantiation of "void boost::_bi::list2<A1, A2>::operator()(boost::_bi::type<void>, F &, A &, int) [with A1=boost::arg<1>, A2=boost::arg<2>, F=my_functor<int>, A=boost::_bi::list2<Info_t &, Info_t &>]" at line 61 of "/home/aniketnp/boost_1_55_0/boost/bind/bind_template.hpp" instantiation of "boost::_bi::bind_t<R, F, L>::result_type boost::_bi::bind_t<R, F, L>::operator()(A1 &, A2 &) [with R=boost::_bi::unspecified, F=my_functor<int>, L=boost::_bi::list2<boost::arg<1>, boost::arg<2>>, A1=Info_t, A2=Info_t]" at line 48 As a workaround, I try to do this, but same error if ((info2.start < info2.end) && (info2.end > info1.end) ) { if ( info1.end < info2.start) //do something } // error is propagated towards inner if loop test.cpp(17): error: expression must have a constant value if ( info1.end < info2.start) ^ detected during: instantiation of "void my_functor<Time>::operator()(const info_t &, const info_t &) [with Time=int, info_t=Info_t]" at line 313 of "/home/aniketnp/boost_1_55_0/boost/bind/bind.hpp" instantiation of "void boost::_bi::list2<A1, A2>::operator()(boost::_bi::type<void>, F &, A &, int) [with A1=boost::arg<1>, A2=boost::arg<2>, F=my_functor<int>, A=boost::_bi::list2<Info_t &, Info_t &>]" at line 61 of "/home/aniketnp/boost_1_55_0/boost/bind/bind_template.hpp" instantiation of "boost::_bi::bind_t<R, F, L>::result_type boost::_bi::bind_t<R, F, L>::operator()(A1 &, A2 &) [with R=boost::_bi::unspecified, F=my_functor<int>, L=boost::_bi::list2<boost::arg<1>, boost::arg<2>>, A1=Info_t, A2=Info_t]" at line 49 test.cpp(17): error: this operator is not allowed in a template argument expression (rest error is the same) ------------------------------------------------------------------------------------------------- Now, if I compile it without " -mmic " flag, then there is no compiler errors. I compile with this : icpc -L/home/aniketnp/tbb42_20140122oss/lib/intel64/gcc4.4 -std=c++11 -I/home/aniketnp/boost_1_55_0 -I/home/aniketnp/tbb42_20140122oss/include test.cpp I dont get any error. It compiles and runs fine. Any thoughts ? Please let me know. -- Thanks and regards, Aniket Pugaonkar

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[utility] prior(it, n) for n being an unsigned type
by Adam Romanek 30 Jun '14

30 Jun '14

Hi! This is a re-post from boost-users mailing list, as I didn't get any response there. I've just finished investigating an issue in my code which led it to an assert/abort in certain cases. It turned out it was caused by the use of boost::prior(it, n) where n was unsigned int with some non-zero value. I found a question [1] on the mailing list back in 2004 which describes this issue. Additionally a solution to this problem was also posted in one of the replies [2]. My question is - why hasn't it made into the repository yet? The current behavior of boost::prior(it, n) when n is unsigned type is far from the one expected by its potential users so I think it should either be properly documented (warned) or fixed immediately. Am I not seeing something? WBR, Adam Romanek [1] http://lists.boost.org/Archives/boost/2004/02/61556.php [2] http://lists.boost.org/Archives/boost/2004/02/61578.php

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[utility][iterator] generator_iterator tests and documentation.
by Daniel James 30 Jun '14

30 Jun '14

Hi, The generator_iterator tests and documentation are in both the utility and iterator modules. There are also some relevant issues in the inspect report for the iterator module: http://boost.cowic.de/rc/docs-inspect-develop.html#iterator

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[iterator] Make operators conditionally defined
by Andrey Semashev 30 Jun '14

30 Jun '14

Hi, I've made this pull request: https://github.com/boostorg/iterator/pull/4 which makes operators defined for iterator_facade conditionally defined depending on the iterator category. As a side effect this change fixes Boost.Graph tests broken by the recent change to boost::next()/prior() [1]. Could someone take a look and merge it? [1] http://lists.boost.org/Archives/boost/2014/06/214788.php

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[fusion] BOOST_FUSION_ADAPT_TPL_STRUCT
by Greg Rubino 29 Jun '14

29 Jun '14

Hello all, I'm trying to do something like this with fusion: struct exists_tag {}; template <typename A> struct unary { type_a m_name; }; template <> struct unary<exists_tag> { type_b m_name; }; BOOST_FUSION_ADAPT_TPL_STRUCT((A), (unary)(A), (type_a)(m_name)); BOOST_FUSION_ADAPT_TPL_STRUCT((), (unary)(exists_tag), (type_b)(m_name)); I'm not sure if I'm way off here, or if there is some way to accomplish this that I'm just not seeing. Here's the error that I get when I try to compile this code: ./include/query_tree.h:122:1: error: template parameters not used in partial specialization: ./include/query_tree.h:122:1: error: ‘Oper’ Repeated 8 times. Any ideas? Thanks, Greg

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function convert() -- do you find it useful?
by Andrzej Krzemienski 29 Jun '14

29 Jun '14

Hi, This is the second time that I have found the following function useful when playing with variants of Optional library: template <typename T, typename U> typename std::enable_if<std::is_convertible<U, T>::value, T>::type convert(U && u) { return std::forward<U>(u); } It performs an implicit conversion from U to T, but you can call it explicitly. [1st] time I needed it to implement the behavior of value_or (described in http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3672.html#optional… ): template <class U> constexpr T optional<T>::value_or(U&& v) const&; Requires: is_copy_constructible<T>::value is true and is_convertible<U&&, T>::value is true. Returns: bool(*this) ? **this : static_cast<T>(std::forward<U>(v)). This needs to be implemented in one expression in C++11, because the function is constexpr, so in the ternary operator, I could either apply no cast and risk unnecessary ambiguity in result type in certain cases, or use a static_cast and bring the explicit conversions in that I didn't want. Function convert() saved the day. [2nd] time was when trying to disable the overload in C++11 using SFINAE, but I didn't want to use enable_if (see a more complete example here: http://akrzemi1.wordpress.com/examples/overloading-enable_if-3/) template <typename U> auto value_or(U const& v) const -> decltype(convert<T>(v)) { if (*this) return this->value(); else return v; } template <typename F> auto value_or(F const& f) const -> decltype(convert<T>(f())) { if (*this) return this->value(); else return f(); } I wanted to check with Boost developers if you find such function convert generally useful (and worth adding somewhere in Boost), or is it just my specific needs. Regards, &rzej

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[regex] [test] Regex auto-link-test problem
by Marcel Raad 29 Jun '14

29 Jun '14

Hi, I'm trying to set up all regression tests on my Windows machine. When I try to execute the test in regex\test\auto-link-test, I get the following error message: ..\..\..\..\b2.exe Jamfile:38: in modules.load ERROR: rule "subproject" unknown in module "Jamfile<[...]\auto-link-test>". [...]/tools/build/src/build\project.jam:311: in load-jamfile [...]/tools/build/src/build\project.jam:64: in load [...]/tools/build/src/build\project.jam:145: in project.find [...]/tools/build/src\build-system.jam:535: in load [...]\tools\build\src/kernel\modules.jam:289: in import [...]\tools\build\src/kernel/bootstrap.jam:139: in boost-build [...]\boost-build.jam:17: in module scope I noticed that the build file is called Jamfile instead of Jamfile.v2, do I have to set Boost.Build to some v1 mode?

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Regression tests broken?
by John Maddock 29 Jun '14

29 Jun '14

For reasons I can't understand, large numbers (almost all actually) of the Math lib tests have just started failing on both master and develop, the error messages all relate to missing object files, for example from a PCH build like this: http://www.boost.org/development/tests/master/developer/output/teeks99-02j-… LINK : fatal error LNK1181: cannot open input file 'C:\local\teeks99-02\j\results\boost\bin.v2\libs\math\test\msvc-12.0\debug\asynch-exceptions-on\link-static\threading-multi\pch_light.obj' Or from common object files that are built with an "obj" rule: http://www.boost.org/development/tests/master/developer/teeks99-02j-win2008… LINK : fatal error LNK1181: cannot open input file 'C:\local\teeks99-02\j\results\boost\bin.v2\libs\math\test\msvc-12.0\debug\asynch-exceptions-on\link-static\threading-multi\compile_test_main.obj' I'm unable to reproduce locally (at least when building in libs/math/test), and strangely not all test runners are showing the issue - though most of them are. Anyone any ideas? Thanks, John.

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