- Boost-users - lists.boost.org

assign from coordinate_matrix to a compressed_matrix problems??
by Anelia Angelova 05 Jul '12

05 Jul '12

Hi, I am trying to convert a coordinate_matrix to a compressed_matrix using the "assign" function and got weird compilations errors. Could you please help me with what the problem is.I am running the following code:------------------int size=10;typedef ublas::coordinate_matrix<double> data_type_1;typedef ublas::compressed_matrix<double> data_type; data_type_1 A(size,size, 9*size);data_type M;M.resize(A.size1(),A.size2(),A.nnz()); // Convert matrix A into a compressed one.M.assign(A); // <----------- Error occurs here!------------------------- I get the following compilation errors: /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/include/g++-v4/bits/stl_tempbuf.h: In constructor 'std::_Temporary_buffer<_ForwardIterator, _Tp>::_Temporary_buffer(_ForwardIterator, _ForwardIterator) [with _ForwardIterator = boost::numeric::ublas::indexed_iterator<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > >, std::random_access_iterator_tag>, _Tp = boost::numeric::ublas::index_triple<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > >]':/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/include/g++-v4/bits/stl_algo.h:3084:17: instantiated from 'void std::inplace_merge(_BIter, _BIter, _BIter) [with _BIter = boost::numeric::ublas::indexed_iterator<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > >, std::random_access_iterator_tag>]'/usr/include/boost/numeric/ublas/matrix_sparse.hpp:4403:17: instantiated from 'void boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::sort() const [with T = double, L = boost::numeric::ublas::basic_row_major<>, long unsigned int IB = 0ul, IA = boost::numeric::ublas::unbounded_array<long unsigned int>, TA = boost::numeric::ublas::unbounded_array<double, std::allocator<double> >]'/usr/include/boost/numeric/ublas/matrix_sparse.hpp:4486:13: instantiated from 'boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::const_iterator1 boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::find1(int, boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::size_type, boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::size_type, int) const [with T = double, L = boost::numeric::ublas::basic_row_major<>, long unsigned int IB = 0ul, IA = boost::numeric::ublas::unbounded_array<long unsigned int>, TA = boost::numeric::ublas::unbounded_array<double, std::allocator<double> >, boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::size_type = long unsigned int]'/usr/include/boost/numeric/ublas/matrix_sparse.hpp:4798:34: instantiated from 'boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::const_iterator1 boost::numeric::ublas::coordinate_matrix<T, L, IB, IA, TA>::begin1() const [with T = double, L = boost::numeric::ublas::basic_row_major<>, long unsigned int IB = 0ul, IA = boost::numeric::ublas::unbounded_array<long unsigned int>, TA = boost::numeric::ublas::unbounded_array<double, std::allocator<double> >]'/usr/include/boost/numeric/ublas/detail/matrix_assign.hpp:909:57: instantiated from 'void boost::numeric::ublas::matrix_assign(M&, const boost::numeric::ublas::matrix_expression<E>&, boost::numeric::ublas::sparse_tag, boost::numeric::ublas::row_major_tag) [with F = boost::numeric::ublas::scalar_assign, R = boost::numeric::ublas::basic_full<>, M = boost::numeric::ublas::compressed_matrix<double>, E = boost::numeric::ublas::coordinate_matrix<double>]'/usr/include/boost/numeric/ublas/detail/matrix_assign.hpp:1216:9: instantiated from 'void boost::numeric::ublas::matrix_assign(M&, const boost::numeric::ublas::matrix_expression<E2>&) [with F = boost::numeric::ublas::scalar_assign, M = boost::numeric::ublas::compressed_matrix<double>, E = boost::numeric::ublas::coordinate_matrix<double>]'/usr/include/boost/numeric/ublas/matrix_sparse.hpp:2992:13: instantiated from 'boost::numeric::ublas::compressed_matrix<T, L, IB, IA, TA>& boost::numeric::ublas::compressed_matrix<T, L, IB, IA, TA>::assign(const boost::numeric::ublas::matrix_expression<E1>&) [with AE = boost::numeric::ublas::coordinate_matrix<double>, T = double, L = boost::numeric::ublas::basic_row_major<>, long unsigned int IB = 0ul, IA = boost::numeric::ublas::unbounded_array<long unsigned int>, TA = boost::numeric::ublas::unbounded_array<double, std::allocator<double> >, boost::numeric::ublas::compressed_matrix<T, L, IB, IA, TA> = boost::numeric::ublas::compressed_matrix<double>]'mexLapBoo.cc:254:12: instantiated from here/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/include/g++-v4/bits/stl_tempbuf.h:192:6: error: invalid initialization of non-const reference of type 'boost::numeric::ublas::index_triple<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > >&' from an rvalue of type 'boost::numeric::ublas::indexed_iterator<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > >, std::random_access_iterator_tag>::reference'/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/include/g++-v4/bits/stl_uninitialized.h:223:5: error: in passing argument 3 of 'void std::__uninitialized_construct_range(_ForwardIterator, _ForwardIterator, _Tp&) [with _ForwardIterator = boost::numeric::ublas::index_triple<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > >*, _Tp = boost::numeric::ublas::index_triple<boost::numeric::ublas::index_triple_array<boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<long unsigned int>, boost::numeric::ublas::unbounded_array<double, std::allocator<double> > > >]' Your help is really appreciated. Thanks a lot!

1 0

Re: [Boost-users] [cfe-dev] Using c++11 features in clang
by Marshall Clow 05 Jul '12

05 Jul '12

On Jul 5, 2012, at 12:41 PM, Joseph Galbraith wrote: > On 07/05/2012 12:29, Marshall Clow wrote: >> In response to a some questions on the boost-users list (and boost bug reports), I wrote up this: >> http://marshall.calepin.co/llvmclang-and-standard-libraries-on-mac-os-x.html >> >> I don't know if this should be a FAQ entry for Boost, or for clang. >> Suggestions/comments/edits welcome. > > Isn't one of both of -std=c++11 and -stdlib=libc++ an ABI change? > > If so, it should probably be noted that all code should be build with > the same settings for these flags. Yes. > In particular, I think that you can't pass a std:: classes from libstdc++ > built code to libc++ code without bad things happening. I would expect that also, but libc++ has versioned namespaces that _should_ prevent that from happening (I.e, cause linker errors). > I'm not sure whether just turning whether the following is safe or not: > > clang++ -c -stdlib=libc++ x.cpp > clang++ -c -stdlib=libc++ -std=c++11 y.cpp > clang++ -stdlib=libc++ x.o y.o I would expect either: * It would "just work" * It would fail to link depending on what the contents of x.cpp and y.cpp were. If you can come up with a good way of explaining this, I'll be happy to add it to my post. -- Marshall Marshall Clow Idio Software <mailto:mclow.lists@gmail.com> A.D. 1517: Martin Luther nails his 95 Theses to the church door and is promptly moderated down to (-1, Flamebait). -- Yu Suzuki

1 0

[boost.locale] Conversion exception when generator class object extracts locale class object for russian utf-8 strings
by NtVisigoth 05 Jul '12

05 Jul '12

Hello, everyone! When using boost::locale with the russian language of the string in UTF-8 encoding I get an error while getting the locale. An exception with the message e.what(): "Conversion failed" is thrown My code is not very different from that in the examples: #define TR(S) boost::locale::translate(S).str()**const std ::string strDefaultLangId( "en" );**int main( int argc, char * argv[] )**{** using namespace std;** using namespace boost::locale;** int exitCode = EXIT_SUCCESS;** try** {** generator gen;** gen.add_messages_path("g:\\source\\boost_locale\\languages\\");** gen.add_messages_domain("messages");** std ::string language( argc == 2 ? argv[1] : strDefaultLangId.c_str() );** std::locale loc = gen( language );** locale::global( loc );** std::wstring s = TR(L"hello world");** wcout << s << endl;** }** catch( exception& e )** {** cout << "Error : " << e.what() << endl;** exitCode = EXIT_FAILURE;** }** catch ( ... )** {** cout << "Unknown error" << endl;** exitCode = EXIT_FAILURE;** }** return exitCode;**} The path to the file with the russian language: "g:\source\boost_locale\languages\ru\LC_MESSAGES\messages.mo" What could be wrong? * Is it necessary to use any backends? * Is it yet necessary to call imbue on the stream? But I'd like avoid it because I am going to write the log using glog.

1 0

[Graph] No known conversion from int to vertex_iterator
by Martin Magnusson 05 Jul '12

05 Jul '12

I'm using BGL to store 3D triangle meshes, and I'm also using the ANN lib to find nearest neighbours of mesh points. My code used to work, using gcc 4.4 and BGL 1.40 (in Ubuntu 10.04), but since upgrading to gcc 4.6 and BGL 1.48 (in Ubuntu 12.04), my code doesn't compile anymore. I cut down my code to a minimal (I think) example that shows my problem. The attached code compiles with the old setup (I just get a warning that adjacency_list.hpp uses a deprecated header), but it does not compile in Ubuntu 12.04, The compilation error I get is "no matching function for call to 'Mesh::Vertex_Iterator::Vertex_Iterator(const Mesh* const, unsigned int&)'" The reason for that is that there is "no known conversion for argument 2 from 'unsigned int' to 'Mesh::Vertex_Graph_Iterator {aka boost::range_detail::integer_iterator<unsigned int>}'" Could anybody explain why, and what I can do to solve it? Is there any way to create a boost::adjacency_list::vertex_iterator using an int in the current version of BGL? #include <boost/graph/adjacency_list.hpp> class Mesh { public: typedef boost::property< boost::vertex_index1_t, int32_t, // The actual vertex boost::property< boost::vertex_index2_t, std::vector< unsigned int >, // Connected mesh faces boost::property< boost::vertex_rank_t, bool > > > // Boundary flag Vertex_Properties; typedef boost::property< boost::edge_weight_t, double > Edge_Length; typedef boost::adjacency_list < boost::setS, // No parallel edges boost::vecS, // Loading gets painful if this is setS boost::undirectedS, // Edges are undirected Vertex_Properties, // Vertices store Vertex, faces & bnd. flag Edge_Length > // Edges store their length Vertex_Graph; typedef Vertex_Graph::vertex_iterator Vertex_Graph_Iterator; //---------------------------------------------------------------// // VERTEX ITERATOR: //---------------------------------------------------------------// class Vertex_Iterator : public boost::iterator_adaptor <Vertex_Iterator, Vertex_Graph_Iterator, int32_t, boost::bidirectional_traversal_tag> { public: Vertex_Iterator() {} Vertex_Iterator( const Mesh* const mesh, Vertex_Graph_Iterator p ) : its_parent (mesh), its_vertex (p) {} const Mesh* its_parent; Vertex_Graph_Iterator its_vertex; }; void test_function() const; }; void Mesh::test_function() const { unsigned int i = 1; std::vector< Mesh::Vertex_Iterator > closest (10); closest[1] = Vertex_Iterator ( this, i ); //THIS IS THE PROBLEM } int main( int argc, char** argv ) { Mesh m; m.test_function(); return 0; }

2 1

Is there a straightforward Boost API for REST Web services calls
by Adam J Cooper 05 Jul '12

05 Jul '12

I am new to Boost and definitely still a novice with C++ in general. I would like to use Amazon Web Services (AWS) with C++. AWS supplies tookits (APIs) for .Net, Java, etc. However, they do not supply an API for C++. Therefore, I believe the best way for me to interact with AWS using C++ will be with REST. My rationale for wanting to use C++ is that I enjoy the flexibility and aesthetics of C++ and want to continue to find opportunities to learn and practice with it. (I do not have a specific application need and could use the AWS .Net API for my project if I needed to). Having said that, I understand that Boost is one of the most highly-regarded add-on libraries for C++. Therefore, is there a Boost library that will EASILY allow me to make REST (get and post) calls? If not, can someone recommend another well-tested and widely used C++ library that would allow me to make such REST calls? Thank you, Adam

5 4

Question about Program Options Vector processing for config file
by Charles Mills 05 Jul '12

05 Jul '12

I have the following in my code cnfOptions->add_options()("pacing", po::value< std::vector<float> >(&foo)->composing(), "Pacing experiment") If my config file contains pacing= 3.14 pacing= 2.718 then it works as expected (foo contains the two float numbers). But "pacing" is really a pair of values, not some collection of independent values. I've tried to find a config file syntax more like pacing= 3.14 2.718 that Boost PO will accept, but I can't find one. (I get syntax error complaints about pacing.) Is there either (a.) a syntax for a single pacing= that PO will "compose" into the vector, or (b.) a change I could make to add_options that would make this work. For example, I'm not in love with vector if there is some other container that would work better. Thanks, Charles

1 0

[Multi Index Container]: Retrieving a set by ordered non-unique criteria?
by Steve Hibbert 05 Jul '12

05 Jul '12

I'm a newbie use of Multi Index Containers, apologies if this question is facile. I have read through the Boost online documentation but am still a bit stumped. I have a container that contains shared pointers to instants of a custom object type (in this case, financial market orders). The container has an ordered-non-unique index defined by a member function of the object. Specifically it is the object's state code, an integer. At any point in time, I would expect several objects with a state value of 1, several with 2, etc. I need to pull back the set of objects in a particular state, to a set. I intend to use the set in testing to 'do something' with one random object in that set, but to all intents and purposes I just need to get the shared pointer to an item in State=1. How would I pull back the set (or analogous container) of objects that are in State=1? I am thinking that I first get a reference to the index in question, which is fine. Would I then do a find(), and would that find() operation return a set-like object? Or, would I need to do a lower_bound() and upper_bound() operation to find the two enclosing iterators, and then copy all shared-pointers-to-objects to a std::set, and then operate on the set as normal? Thanks in advance for assistance with this, help is greatly appreciated. Steve [I'm aware that if I change state values, I have to do so via the modify function, via the index, been bitten on that point before.]

2 1

Compiling boost asio 1.50.0 under Xcode 4.3.3 with Clang or GCC and c++11 support
by Graham Reitz 05 Jul '12

05 Jul '12

(Below) Is this is known issue, am I missing something, or does the libboost_system.a library need to be compiled differently than the default directions to work with c++11 support? The following code produces linker errors when the compiler options -std=c++11and libc++ are used: #include <iostream> #include <boost/asio.hpp> int main( int argc, char* argv[] ) { return 0; } Undefined symbols for architecture x86_64: "std::allocator<char>::allocator()", referenced from: (anonymous namespace)::generic_error_category::message(int) const in libboost_system.a(error_code.o) "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)", referenced from: (anonymous namespace)::generic_error_category::message(int) const in libboost_system.a(error_code.o) "std::allocator<char>::~allocator()", referenced from: (anonymous namespace)::generic_error_category::message(int) const in libboost_system.a(error_code.o) "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string()", referenced from: (anonymous namespace)::generic_error_category::message(int) const in libboost_system.a(error_code.o) "std::string::operator=(char const*)", referenced from: (anonymous namespace)::generic_error_category::message(int) const in libboost_system.a(error_code.o) "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(std::string const&)", referenced from: (anonymous namespace)::generic_error_category::message(int) const in libboost_system.a(error_code.o) "std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()", referenced from: (anonymous namespace)::generic_error_category::message(int) const in libboost_system.a(error_code.o) ___tcf_0 in libboost_system.a(error_code.o) ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

2 2

[test] defining a macro to ignore tests
by Marco Craveiro 05 Jul '12

05 Jul '12

boost-uers, I vaguely recall a discussion a while ago regarding support for ignoring tests in boost test, and the conclusion being that its not possible. However, is it as simple as defining a macro such as this? #define BOOST_IGNORE_AUTO_TEST_CASE(test_name) void test_name() If that's the case, it would really be useful to have this in boost test. Cheers Marco -- So young, and already so unknown -- Pauli blog: http://mcraveiro.blogspot.com

3 3

[1.50.0][scope exit] dead link documentation
by Akira Takahashi 05 Jul '12

05 Jul '12

Hi, I found dead link documentation in follow page's "Tutorial" link. http://www.boost.org/doc/libs/1_50_0/libs/scope_exit/doc/html/index.html "404 Not Found File "/home/grafik/www.boost.org/archives/live/boost_1_50_0/libs/scope_exit/doc/html/scope_exit/Tutorial.html" not found. Unable to find file." Correct page is "tutorial.html". Please fix link. Thanks, Akira >>======================== Akira Takahashi mailto:faithandbrave@gmail.com site : https://sites.google.com/site/faithandbrave/about/en

2 2