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working with code::blocks
by Lú 10 Oct '08

10 Oct '08

Dear users, I'm trying to install the boost library in my PC to work with Code::Blocks software, which uses MINGW, and it doesn't seem to be working well. Two configurations were tested, in Windows XP and in Ubuntu (Hard Heron), it doesn't exactly fail to install in Ubuntu, but my #include/boost/?? never finds the headers. Is there something I should be doing that is not in the Getting Started manual? Thanks in advance! Lu

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boost 1.36 on fedora 7
by Sameer Agarwal 10 Oct '08

10 Oct '08

Hello Everyone, I am trying to compile boost 1.36.0 with gcc 4.1.2 on Fedora 7 and while compiling extension.cpp in boost.python, it triggers an internal compiler error --------- gcc.compile.c++ bin/gcc-4.1.2/debug/extending.o ../../../../boost/type_traits/detail/cv_traits_impl.hpp: In instantiation of ‘const bool boost::detail::cv_traits_imp<<unnamed>::hello*>::is_const’: ../../../../boost/type_traits/is_const.hpp:53: instantiated from ‘boost::is_const<<unnamed>::hello>’ ../../../../boost/python/detail/cv_category.hpp:31: instantiated from ‘boost::python::detail::cv_category<<unnamed>::hello>’ ../../../../boost/python/detail/unwind_type.hpp:58: instantiated from ‘typename Generator::result_type boost::python::detail::unwind_ptr_type(U*, Generator*) [with Generator = boost::python::converter::detail::unwind_type_id_helper, U = <unnamed>::hello]’ ../../../../boost/python/detail/unwind_type.hpp:127: instantiated from ‘static typename Generator::result_type boost::python::detail::unwind_helper2<2>::execute(U& (*)(), Generator*) [with Generator = boost::python::converter::detail::unwind_type_id_helper, U = <unnamed>::hello]’ ../../../../boost/python/detail/unwind_type.hpp:165: instantiated from ‘typename Generator::result_type boost::python::detail::unwind_type(boost::type<U>*, Generator*) [with Generator = boost::python::converter::detail::unwind_type_id_helper, U = <unnamed>::hello&]’ ../../../../boost/python/converter/pytype_function.hpp:45: instantiated from ‘boost::python::type_info boost::python::converter::detail::unwind_type_id_(boost::type<T>*, mpl_::false_*) [with T = <unnamed>::hello&]’ ../../../../boost/python/converter/pytype_function.hpp:68: instantiated from ‘static const PyTypeObject* boost::python::converter::expected_pytype_for_arg<T>::get_pytype() [with T = <unnamed>::hello&]’ ../../../../boost/python/detail/signature.hpp:98: instantiated from ‘static const boost::python::detail::signature_element* boost::python::detail::signature_arity<1u>::impl<Sig>::elements() [with Sig = boost::mpl::vector2<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, <unnamed>::hello&>]’ ../../../../boost/python/detail/caller.hpp:232: instantiated from ‘static boost::python::detail::py_func_sig_info boost::python::detail::caller_arity<1u>::impl<F, Policies, Sig>::signature() [with F = std::string (<unnamed>::hello::*)()const, Policies = boost::python::default_call_policies, Sig = boost::mpl::vector2<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, <unnamed>::hello&>]’ ../../../../boost/python/object/py_function.hpp:48: instantiated from ‘boost::python::detail::py_func_sig_info boost::python::objects::caller_py_function_impl<Caller>::signature() const [with Caller = boost::python::detail::caller<std::string (<unnamed>::hello::*)()const, boost::python::default_call_policies, boost::mpl::vector2<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, <unnamed>::hello&> >]’ extending.cpp:40: instantiated from here ../../../../boost/type_traits/detail/cv_traits_impl.hpp:37: internal compiler error: in make_rtl_for_nonlocal_decl, at cp/decl.c:5069 ------------- Is anyone else seeing this? Also has anyone had any luck compiling boost with the intel compiler suite (version 10.1) on linux? Thanks, Sameer

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MSVC _SECURE_SCL causes ABI change, ODR violation - mangle library names?
by Jean-Francois Bastien 10 Oct '08

10 Oct '08

The _SECURE_SCL macro in Visual Studio's (Dinkumware's) STL changes the ABI for standard types, which causes silent ODR violations when Boost static libraries and the main program linking with them don't define this macro the same way. This problem manifests itself as runtime crashes. There's been discussion before (see links at the end) to solve this by using different library names in the build system to distinguish different ABIs. The discussions brought up issues: - _SECURE_SCL implies a performance cost. - _SECURE_SCL might not be conformant with the complexity requirements (no clear conclusion was reached on this). - Should the compiler's default behaviour be Boost's default (i.e. _SECURE_SCL isn't defined)? - The Windows version of the Intel compiler has a bug around partial function template ordering which can be solved by defining _SECURE_SCL to 0. There's already a Trac issue for this: http://svn.boost.org/trac/boost/ticket/2086 Could we reach a consensus on adding this to the library name mangling? Is it too late for 1.37.0? Thanks, JF References: msvc toolset addition stl-security-theater http://lists.boost.org/boost-build/2008/09/index.php#20072 High Cost of MS "Safe" STL for Release Builds http://lists.boost.org/boost-build/2008/04/18828.php System: error_code.cpp #definesmacroswithoutchecking if already defined http://lists.boost.org/boost-build/2008/04/18754.php What plans to handle _SCEURE_SCL in the boost build system? http://lists.boost.org/Archives/boost/2008/04/index.php#136481 Intel compiler - does anyone care? http://lists.boost.org/Archives/boost/2008/01/index.php#132079 bjam define=_SECURE_SCL shows no effect http://lists.boost.org/boost-users/2007/05/index.php#27928 Bug/Incompatibility: Visual C++ 2005 checkediteratorslead to major crashes http://lists.boost.org/Archives/boost/2006/06/index.php#106415 vc 8 secure stl/runtime and boost http://lists.boost.org/boost-users/2005/12/index.php#15843

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printing data sorted based on a specific key in boost multi-index container
by Ramesh 10 Oct '08

10 Oct '08

Hi Joaquin, Supposing I have a container having three unique keys, Is there a way I can print data sorted by one of they keys? At the moment I tried a raw dump - it shows fields based on the first key (which is key1). Thanks Ramesh ---- typedef multi_index_container< MyMap, indexed_by< ordered_unique< tag <Key1>, BOOST_MULTI_INDEX_MEMBER(MyMap,std::string,Key1)>, ordered_non_unique< tag<Key2>,BOOST_MULTI_INDEX_MEMBER(MyMap,unsigned long,Key2)>, ordered_unique< tag<Key3>,BOOST_MULTI_INDEX_MEMBER(MyMap,unsigned long,Key3)> > > tMyMap; class MyContainer { private: tMyMap MapObj; public: Show(){ for (MyMap::iterator it = MyContainer.begin(), itend = MyContainer.end(); it != itend;++it) { cout << it->Key1; cout << it->Key2; cout << it->Key3; } } }; main() { MyContainer M; // Assuming I have data inserted in the container like // ("Id 4", 10, 10) // ("Id 1", 10, 40) // ("Id 5", 30, 60) M.Show() // The result is as below: //("Id 5", 30, 60) // ("Id 1", 10, 40) // ("Id 4", 10, 10) }

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[multi_array] Slices, views and sub_arrays
by Robert Jones 10 Oct '08

10 Oct '08

Hi All I'm still plugging away at trying to make use of multi_array, but I seem to be having a few problems! I suspect my understanding of the basic paradigm is flawed. I'm bit confused about views and slices. If I start with a rectangular, 2 dimensional grid, take a view of the whole grid, and then use a single subscript to index into that view, then I expected the result to be a view of one less dimension then the original view. However, it seems to be a "sub_array". #include "boost/multi_array.hpp" struct Cell { int i; }; int main( ) { typedef boost :: multi_array_types :: index_range range; boost :: multi_array< Cell, 2 > grid( boost :: extents[ 9 ][ 9 ] ); boost :: multi_array< Cell, 2 > :: const_array_view< 2 > :: type const_grid_view = grid[ boost :: indices[ range( ) ][ range( ) ] ]; boost :: multi_array< Cell, 2 > :: const_array_view< 1 > :: type const_row_view = const_grid_view[ 5 ]; return 0; } The error message from the last assignment is this sample.cpp: In function `int main()': sample.cpp:13: error: conversion from `boost::detail::multi_array::const_sub_array<Cell, 1u, const Cell*>' to non-scalar type `boost::detail::multi_array::const_multi_array_view<Cell, 1u, const Cell*>' requested which seems to confirm I've got all my consts and dimensions correct. So, why is this wrong? Also, does the return type of sub_array, rather than array_view, mean that the contents of the relevant cells have been copied? Thanks - Rob.

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program option::force to suppy only short name
by Lloyd 10 Oct '08

10 Oct '08

Hi, I am using boost program options library Can I supply only "short names" eg. options_desctiprion desc("sample"); desc.add_options() ("help,h","display help") (",c","compress") ; in the case of option "c" we don't want to allow the user to supply a long name. Howe can we do this? Thanks, Lloyd ______________________________________ Scanned and protected by Email scanner

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Re: [Boost-users] mpl programming task
by peter_foelsche＠agilent.com 09 Oct '08

09 Oct '08

I think the following code would be easier: #include <map> #include <vector> typedef std::map<size_t, size_t> CInt2IntMap; typedef std::vector<size_t> CIntVector; static CInt2IntMap convert(const CIntVector &_r) { CInt2IntMap s; for (size_t i = 0; i < _r.size(); i++) s.insert(std::make_pair(_r[i], s.size())); return s; }

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mpl programming task
by peter_foelsche＠agilent.com 09 Oct '08

09 Oct '08

Anybody able to tell me how to convert the following code into it's mpl equivalent? #include <map> #include <vector> typedef std::map<size_t, size_t> CInt2IntMap; typedef std::vector<bool> CBooleanVector; static CInt2IntMap convert(const CBooleanVector &_r) { CInt2IntMap s; for (size_t i = 0; i < _r.size(); i++) if (_r[i]) s.insert(std::make_pair(i, s.size())); return s; }

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boost::variant construction,assignment
by Hicham Mouline 09 Oct '08

09 Oct '08

hello, class parameters { public: parameters(); ~parameters(); const R& getR() const; void setR(const R& rhs); const V& getV() const; void setV(const V& rhs); private: const R* r_; const V* v_; }; R and V are typedefs of variant<>. I have chosen to make the private members r_ and v_ as pointers to allow for r_=0 and v_=0 (is this a "never do this" thing?). R setter is implemented like this: void parameters::setR(const R& rhs) { if (!r_) r_ = new R( rhs ); else *r_ = rhs; } then ~parameters() { if (r_) delete r_; } There is no operator= for variant<> it seems? regards,

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Re: [Boost-users] [Graph] Subgraphs with bundled properties
by Cooprider, Nathan (US NonSSA) 09 Oct '08

09 Oct '08

I would like to use a set to store my nodes inside a graph that uses subgraphs, but that does not seem to work. The code below does not compile if I switch vecS to setS and adjust the vertex properties to have an index (replace Node, with the commented portion after it). However, not using a subgraph and having the adjacency list be the graph directly fixes the issue. Any insights as to what I should do Nathan #include <string> #include <boost/graph/adjacency_list.hpp> #include <boost/config.hpp> #include <boost/graph/subgraph.hpp> using namespace boost; struct Node { std::string name; float weight; }; // want vecS to be setS for fast lookups typedef adjacency_list < listS, setS, directedS, Node, // property<vertex_index_t, int, Node >, property<edge_index_t, int> > PlainGraph; typedef subgraph<PlainGraph> Graph; int main () { Graph g; Graph::vertex_descriptor tmp = add_vertex(g); struct Node x; put(get(vertex_bundle,g), tmp, x); }

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