September 2009 - Boost-users - lists.preview.boost.org

[boost.task] local_rr_ums.hpp missing
by Tan, Tom (Shanghai) 11 Sep '09

11 Sep '09

This header file is referenced while using static_pool. But it seems to be missing in either boost trunk or vault. Where can I get the latest version? Thanks.

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boost thread on x64
by Pascal Kesseli 11 Sep '09

11 Sep '09

Hi friends Using the freshly created MinGW 64bit build, creating the boost 1.40 libraries with bjam worked flawlessly. However, when including boost/thread.hpp, I receive the following error: In file included from C:\Program Files\C++\boost\boost_1_40_0/boost/thread/win32/basic_timed_mutex.hpp:14, from C:\Program Files\C++\boost\boost_1_40_0/boost/thread/win32/mutex.hpp:8, from C:\Program Files\C++\boost\boost_1_40_0/boost/thread/mutex.hpp:14, … [View More]

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Re: [Boost-users] RE : [lambda] for thread bind
by Boost lzw 10 Sep '09

10 Sep '09

Thanks. bind(&test_thread, s) works. How can I bind one boost::thread to another boost::thread? Here is what I want to do: void work_thread() { cout << "done" << endl; } void test_thread(boost::thread& t) { while (t.joinable()) { // do sth. this_thread::sleep(seconds(2)); } } int main() { boost::thread work_thread(work_thread); // this line does not compile boost::thread inquiry_thread(bind(&test_thread, work_thread ) ); work_thread.… [View More]

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[lambda] for thread bind
by Boost lzw 10 Sep '09

10 Sep '09

Hi there, I am playing with lambda. This following code works: ------------------------------------- void test_thread(std::string s) { cout << "string is" << s << endl; } boost::thread enquiry_thread(test_thread, s ); ------------------------------------- but the lambda version does not compile. Why? Thanks. ------------------------------------- #include"boost/lambda/lambda.hpp" #include"boost/lambda/bind.hpp" using namespace boost::lambda; void test_thread(std:… [View More]

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Status of Boost.Extension from sandbox?
by Rex Kerr 10 Sep '09

10 Sep '09

I'm evaluating various plugin solutions for a project and am considering boost.extension as one of the alternatives. Looking at http://boost-extension.blogspot.com/ and the mailing list archives it appears that the project hasn't been active for a while. I have tried, unsuccessfully, to find a page detailing the current status of sandbox projects to determine whether or not it has been accepted for inclusion in future boost versions, has significant flaws preventing its inclusion, etc. I'm … [View More]

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[thread]
by Alexander Heinrich 10 Sep '09

10 Sep '09

I want to determine if a given thread is still running or has already completed. I thought the joinable() method would provide this information, but unfortunately it seems that a thread does not automatically become Not-A-Thread after completion. I wrote a small app to verify this: <code> #include <iostream> using namespace std; #include <boost/thread.hpp> #include <boost/thread/mutex.hpp> #include <boost/date_time/posix_time/posix_time_types.hpp> using namespace … [View More]

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transform_iterator requirement on the Iterator?
by Hicham Mouline 10 Sep '09

10 Sep '09

Hi, >From the docs, I don't see the Iterator argument is required to be default-constructible. I have a gcc4.3.3 error stack that looks like: /usr/include/boost-1_37/boost/iterator/iterator_adaptor.hpp: In constructor 'boost::iterator_adaptor<Derived, Base, Value, Traversal, Reference, Difference>::iterator_adaptor() [with Derived = boost::transform_iterator<Math::Curve1D<MathTest::Curve1D::CurveSVOTrait>::G etXIter, Math::CurveContainerIter<std::pair<… [View More]double, double>, 4u, true>, boost::use_default, boost::use_default>, Base = Math::CurveContainerIter<std::pair<double, double>, 4u, true>, Value = const double, Traversal = boost::use_default, Reference = const double&, Difference = boost::use_default]': /usr/include/boost-1_37/boost/iterator/transform_iterator.hpp:100: instantiated from 'boost::transform_iterator<UnaryFunction, Iterator, Reference, Value>::transform_iterator() [with UnaryFunc = Math::Curve1D<MathTest::Curve1D::CurveSVOTrait>::GetXIter, Iterator = Math::CurveContainerIter<std::pair<double, double>, 4u, true>, Reference = boost::use_default, Value = boost::use_default]' /usr/lib/gcc/x86_64-redhat-linux/4.3.3/../../../../include/c++/4.3.3/bits/st l_algo.h:2086: instantiated from '_FIter std::lower_bound(_FIter, _FIter, const _Tp&) [with _FIter = boost::transform_iterator<Math::Curve1D<MathTest::Curve1D::CurveSVOTrait>::G etXIter, Math::CurveContainerIter<std::pair<double, double>, 4u, true>, boost::use_default, boost::use_default>, _Tp = double]' _____ math/interExtrapolators/interExtrapolate.hpp:75: instantiated from 'typename std::iterator_traits<fIterType>::value_type Math::InterExtrapolators::InterExtrapolate(xIterType, xIterType, fIterType, typename std::iterator_traits<_OI>::value_type, typename boost::call_traits<T>::param_type, typename boost::call_traits<Extrap>::param_type) [with Interp = Math::InterExtrapolators::StairCase1D, Extrap = Math::InterExtrapolators::StairCase1D, xIterType = boost::transform_iterator<Math::Curve1D<MathTest::Curve1D::CurveSVOTrait>::G etXIter, Math::CurveContainerIter<std::pair<double, double>, 4u, true>, boost::use_default, boost::use_default>, fIterType = boost::transform_iterator<Math::Curve1D<MathTest::Curve1D::CurveSVOTrait>::G etFIter, Math::CurveContainerIter<std::pair<double, double>, 4u, true>, boost::use_default, boost::use_default>]' ... mathTest/curve1D.cpp:72: instantiated from here /usr/include/boost-1_37/boost/iterator/iterator_adaptor.hpp:279: error: no matching function for call to 'Math::CurveContainerIter<std::pair<double, double>, 4u, true>::CurveContainerIter()' where it seems the compiler is looking for CurveContainerIter() with no arguments. but such constructor does not exist because the iterator has a member reference to the container. Or is this a requirement of std::lower_bound? Basically, the last line of the stack that is my code is xIterType xiter = std::lower_bound( xbegin, xend, x ); where xIterType is typedef boost::transform_iterator<GetXIter,ContainerConstIterType> xIterType; GetXIter is a unary function object, and ContainerConstIterType is CurveContainerIter<..., true> , true being for const'ness of the iterator. Xbegin, xend and x all of xIterType Regards, [View Less]

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[ptr_container] Transferring the Last Element from a ptr_vector
by Charles Brockman 10 Sep '09

10 Sep '09

I have two functions which swap elements between ptr_vectors. The first compiles and apparently works correctly. typedef boost::ptr_vector<Gene> GeneVectType; GeneVectType geneVect; void Gene::swapGene(Gene* other) { geneVect.transfer(geneVect.end(), other->geneVect.begin(), other->geneVect); other->geneVect.transfer(other->geneVect.end(), geneVect.begin(), geneVect); } Occasionally I must reverse the swap with this unswap function. void Gene::unswapGene(Gene* … [View More]other) { // The line below is line 560 referred to in the error message. geneVect.transfer(geneVect.begin(), other->geneVect.rbegin(), other->geneVect); other->geneVect.transfer(other->geneVect.begin(), geneVect.rbegin(), geneVect); } This function should take the last element from each container and transfer it to the beginning of the other container. The unswapGene function will not compile. Here's the compiler message. C:\Boost SVN\trunk\boost/range/const_iterator.hpp(37) : error C2039: 'const_iterator' : is not a member of 'boost::reverse_iterator<Iterator>' with [Iterator=boost::void_ptr_iterator<std::_Vector_iterator<void *,std::allocator<void *>>,genprg::Gene>] C:\Boost SVN\trunk\boost/mpl/eval_if.hpp(63) : see reference to class template instantiation 'boost::range_const_iterator<C>' being compiled with [C=boost::reverse_iterator<boost::void_ptr_iterator<std::_Vector_iterator<void *,std::allocator<void *>>,genprg::Gene>>] C:\Boost SVN\trunk\boost/range/iterator.hpp(63) : see reference to class template instantiation 'boost::mpl::eval_if_c<C,F1,F2>' being compiled with [C=true, F1=boost::range_const_iterator<boost::reverse_iterator<boost::void_ptr_iterator<std::_Vector_iterator<void *,std::allocator<void *>>,genprg::Gene>>>, F2=boost::range_mutable_iterator<const boost::reverse_iterator<boost::void_ptr_iterator<std::_Vector_iterator<void *,std::allocator<void *>>,genprg::Gene>>>] C:\Boost SVN\trunk\boost/ptr_container/ptr_sequence_adapter.hpp(458) : see reference to class template instantiation 'boost::range_iterator<C>' being compiled with [C=const boost::reverse_iterator<boost::void_ptr_iterator<std::_Vector_iterator<void *,std::allocator<void *>>,genprg::Gene>>] ..\..\..\..\GSSTA\gene.cpp(560) : see reference to function template instantiation 'void boost::ptr_sequence_adapter<T,VoidPtrSeq,CloneAllocator>::transfer<genprg::Gene::GeneVectType,boost::reverse_iterator<Iterator>>(boost::void_ptr_iterator<VoidIter,T>,const Range &,PtrSeqAdapter &)' being compiled with [T=genprg::Gene, VoidPtrSeq=std::vector<void *,std::allocator<void *>>, CloneAllocator=boost::heap_clone_allocator, Iterator=boost::void_ptr_iterator<std::_Vector_iterator<void *,std::allocator<void *>>,genprg::Gene>, VoidIter=std::_Vector_iterator<void *,std::allocator<void *>>, Range=boost::reverse_iterator<boost::void_ptr_iterator<std::_Vector_iterator<void *,std::allocator<void *>>,genprg::Gene>>, PtrSeqAdapter=genprg::Gene::GeneVectType] Can anyone see what I'm doing wrong? -- Charles [View Less]

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[boost::multi_array] Is there simple method to delete certain row / column?
by Vladimir Petorov 10 Sep '09

10 Sep '09

Hello! I got two-dimensional array class based on boost::multi_array class. I need to delete some certain column or row of it. How to delete it with keeping the data? For example I have 2D array 6x6, and i need to delete 3th row and 4th column with keeping data from other rows and columns. Is it simple method (multi_array class function or some smart method) or should i create new array 5x5 and copy data in it except 3th row and 4th column? Thanks!

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[BGL] DistanceMatrix type for johnson_all_pairs_shortest_paths
by Ralf Goertz 10 Sep '09

10 Sep '09

Hi, I spent a lot of time to figure out what the problem was. But the reason why there is a problem is still not clear. I modified the johnson_all_pairs_shortest_paths example program to allow for non-constant graphs. The example prog contained std::vector < int >d(V, (std::numeric_limits < int >::max)()); int D[V][V]; johnson_all_pairs_shortest_paths(g, D, distance_map(&d[0])); with V being const int whose value is known at compile time. In my program this is obviously not … [View More]

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