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static library link (unit test) to msvc 2008
by nbtvd fdstrhnbbx 11 Oct '08

11 Oct '08

Hello , I have used bjam (cmd: bjam test) for boost (1.36.0) test library. It has generated some ".lib" files for static binding to my target project. Now can someone explain to me (step by step please ) how to use these ".lib" files in msvc 2008 ? By the way this is the name of one of them: libboost_unit_test_framework-vc90-mt-gd-1_36.lib ( ok this is a naive question but I could not find how on boost documentation either on msdn I just found how to use a ".lib" file in another project in the same solution but apparently this is not the case because of pre-built library. ) Thanks afore :) .

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mpl compiler performance
by Hicham Mouline 11 Oct '08

11 Oct '08

Hello, I am a novice user of mpl and I am running into slow compile times with intel c++. I have some 5 class templates that are each instantiated some 20 times or so. (2mns or so per translation unit). I will reread Appendix C of Abrahams and Gurtovoy's "C++ Template metaprogramming". Is there any how-to or guide that describes idioms to avoid that I can read before I fire off specific questions to the list? Regards,

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[Boost documentation] was Re: serialization1.36.0 extended_type_info exit issue(s)
by Robert Ramey 11 Oct '08

11 Oct '08

>From the boost build / merge >> The same goes for boost documentation which I would >> really like to use. But I don't feel confident that "it >> just works" > > Heh, there's nobody here who would disagree with that. To me the sad part of this is a) that I personally have a HUGE need for something like the boost documentation system in my own projects. b) I feel that if it were subjected to the normal boost testing regimen, it would be a dependable product by now. Or at least we would have a good test matrix which I could use to know what aspects I can't use in my environment. What I would like to see is: a) a directory structures that looks like one of the following .../libs serialization doc *.html // i.e. same as we have now or .../libs serialization doc Jamfile.v2 (optional) pdf (optional - built on demand by bjam from boost book) *. pdf files windows html help (optional - built on demand by bjam from boost book *.chm files html (included in distribution - optionally (re-built) by bjam from boost book) *.html files boostbook (hand prepared - or built by bjam from quickbooks) * .. boost book filles quickbooks (optional - hand prepared) For any library I was interested in I could review the html or build the version I needed by going to the doc directory and invoking something like bjam -???? or bjam -????? pdf And if I want to spend $300 on a proprietary package, I could do that as well - just as I do for my compiler. But to do this the following tools have to be tested on a regular basis like the libraries are: a) boostbook -> pdf b) boostbook->windows html help c) boostbook->html d) quickbooks->boostbook so there would be a couple of "new" tool/library directories ../tools boostbook build Jamfile.v2 doc boost book documentation src ... test quickbooks ... same as above And of course these tests would be part of the normal test matrix. I realize that this sounds like a lot of effort. But then a lot of the above is already in boost somewhere so a large part of the effort would be shuffling a round stuff that's already in there (boost). I believe that reorganizing boost documentation along the above would result in a robust and very popular tool/library. Robert Ramey

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How to build Boost 1.36.0 with STLPort 4.6.2 on gcc 3.2.3 for Linux-x86-32 ?
by Shetty, Diwakar 11 Oct '08

11 Oct '08

Hello all, I have been struggling with this for more than a day now. I would like to build Boost 1.36.0 with STLPort 4.6.2 on gcc 3.2.3 for Linux-x86-32. I have tried all options as below but none of them work for me. 1) bjam --stagedir=/somepath/install toolset=gcc stdlib=stlport install 2) bjam -sTOOLS="gcc-stlport" -sSTLPORT_PATH="/somepath/STLport-4.6.2/stlport/" -sSTLPORT_VERSION="4.6.2" --prefix=/somepath/boost_1_36_0/install install 3) Added following to "boost/config/user.hpp" #define BOOST_STDLIB_CONFIG "boost/config/stlport.hpp" Then ran ./configure --prefix=/somepath/install install Could somebody please help? Its driving me nuts trying to figure this out from Boost docs and using "google" Thanks, Diwakar ============================================================================== Please access the attached hyperlink for an important electronic communications disclaimer: http://www.credit-suisse.com/legal/en/disclaimer_email_ib.html ==============================================================================

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[multi_array] Access a view's index_range
by Robert Jones 10 Oct '08

10 Oct '08

How do I access the index_range of an array_view? ie., typedef boost::multi_array<Cell,2 > Grid; Grid grid( boost::extents[9][9]); Grid::array_view<2> view = grid[indices[range(), range()]]; for (Grid::index i = view.?????.start(); i != view.?????.finish(); ++i) {....} where I'm expecting i to take values 0..8 inclusive. Thanks - Rob.

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Re: [Boost-users] mpl programming task
by peter_foelsche＠agilent.com 10 Oct '08

10 Oct '08

or even more clear: #include <map> #include <set> typedef std::map<size_t, size_t> CInt2IntMap; typedef std::set<size_t> CIntSet; static CInt2IntMap convert(const CIntSet &_r) { CInt2IntMap s; for (CIntSet::const_iterator p = _r.begin(); p != _r.end(); ++p) s.insert(std::make_pair(*p, s.size())); return s; }

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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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[Python] rule python-extension unknown
by Robert MacHardy 09 Oct '08

09 Oct '08

Boost Users, I am trying to build the Hello World python example. When I execute bjam I get the "rule python-extension unknown" error. I believe this to be because my user-config.jam file is never being used. The tutorial states to configure the rules in the user-config.jam file in my home directory. My home directory is "C:\Documents and Settings\robert.machardy". I did not find the file there, and this does not appear to be the place for jam files. I found the file user-config.jam in "C:\Program Files\boost\boost_1_36_0\tools\build\v2", I edited it and copied to my home directory. I configured it for the following: # Configure specific msvc version (searched for in standard locations and PATH). using msvc : 7.1 ; using python : 2.6 : C:\Program Files\Python26; Please help. Thank you, Robert MacHardy

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Re: [Boost-users] boost::variant construction,assignment
by Hicham Mouline 09 Oct '08

09 Oct '08

Thank you. I apologize, one often fails to grasp the obvious, regards, > ----- Original Message ----- > From: "Steven Watanabe" <watanabesj(a)gmail.com> > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] boost::variant construction,assignment > Date: Thu, 09 Oct 2008 10:06:05 -0700 > > > AMDG > > Hicham Mouline wrote: > > const R* r_; > > > > > > *r_ = rhs; > > > > > > There is no operator= for variant<> it seems? > > > > Sure there is, but only works for non-const variant<>s. > > In Christ, > Steven Watanabe

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boost::program_options
by Duy Nguyen 09 Oct '08

09 Oct '08

When I try to use the boost::program_options library to read a property file, I got the error when I run "make" on Cygwin (I installed Cygwin on WIndows XP). > make g++.exe -I /cygdrive/c/MyTest/Test1/include/boost-1_34_1/ -c TestInit.cpp Test.cpp TestDriver.cpp g++.exe -I /cygdrive/c/MyTest/Test1/include/boost-1_34_1/ -c TestInit.cpp Test.cpp TestDriver.cpp g++.exe -I /cygdrive/c/MyTest/Test1/include/boost-1_34_1/ -c TestInit.cpp Test.cpp TestDriver.cpp g++.exe TestInit.o Test.o TestDriver.o -o "TestDriver" -L/cygdrive/c/MyTest/Test1/lib -lboost_program_options-gcc34-mt-d-1_34_1 -lg2c Info: resolving vtable for boost::program_options::variables_mapby linking to __imp___ZTVN5boost15program_options13variables_mapE (auto-import) Then when I run my program, it does not work. If I comment out the "try ... catch" block which uses the boost::propram_options library then it compiles and works fine. Please show me how to fix it. Thank you.

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shared_ptr and std::set::erase
by Javier Jerónimo 09 Oct '08

09 Oct '08

Hello, I have: std::set< boost::shared_ptr< A > > m_set; and when I try to do: m_set.erase( somesharedptr ); the shared_ptr is not removed from the set. There is already a shared_ptr object pointing to the same A object inside the set. I think it's because the definition of "shared_ptr<>::operator<" and its use in std::set<>::erase. What's the correct way of using a shared_ptr inside a set? Thanks.

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Re: [Boost-users] [boost-users][serialization] porting to windows ce?
by Bobby Nations 09 Oct '08

09 Oct '08

Ack, I found a spot where I fat-fingered the code at fault when writing the original message. Please replace ::boost::detail::false_t value; With typename ::boost::detail::false_t value; It doesn't seem to make a difference in the actual error messages themselves, but typos are never good. In case anyone asks, I'm trying to compile against the 1.34.1 release using Visual Studio 2005 SP1 to compile the source via the solution and project files found in "boost\libs\serialization\vc7ide". I also have a patch file that has all of my changes if it might help. Granted it's pretty big (~12 meg) because VS2005 upgraded all of the project files, but I can make it available if it would help. Thanks, Bobby Nations

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[multi-index] Segmentation fault during erase
by Joshua Moore-Oliva 09 Oct '08

09 Oct '08

(I am using 64-bit boost 1.33.1, gcc version 4.1.2) I am trying to track down an elusive segmentation fault that occurs after days of running a program. I am wondering if I am using the boost multi-index library incorrectly. I have a coredump that gives the following backtrace (full backtrace at the end of this email). at /usr/include/boost/multi_index/detail/ord_index_node.hpp:274 a274 while(x!=root&&(x==0 || x->color()==black)){ having looked at the code in that function, I can only assume it is called as a result of these two following lines: (Attempting to erase the first member of the index). CallQueue::nth_index<CALL_NEXT_CALL_TIME>::type & timeIndex = this->m_calls.get<CALL_NEXT_CALL_TIME>(); timeIndex.erase( timeIndex.begin() ); I am certain that the queue is not empty, as the following methods guard against an empty queue. (Shown in an excerpt of my relevant code at the bottom of this email). Finally, my definition for the m_calls structure and #defines for the indexes follow at the end of this email. My program is very clean memory wise, having run a fairly extensive test suite through valgrind, so the possibility of other memory errors compounding are low. My main question is if I am using the multi-index library incorrectly, or if there is a bug in the multi-index library. Failing that, any insight as to why I would be getting this error is appreciated :). Thanks, Josh %%%START m_calls structure%%% typedef boost::multi_index::multi_index_container< Call * , boost::multi_index::indexed_by< boost::multi_index::ordered_unique< BOOST_MULTI_INDEX_CONST_MEM_FUN( Call , int , getId ) > , boost::multi_index::ordered_non_unique< BOOST_MULTI_INDEX_CONST_MEM_FUN( Call , const boost::posix_time::ptime & , getNextCallTime ) > > > CallQueue; CallQueue m_calls; %%%END m_calls structure%%% %%%START #defines for m_calls indexes%%% #define CALL_ID 0 #define CALL_NEXT_CALL_TIME 1 %%%END #defines for m_calls indexes%%% %%%START MY CODE%%% Call * PhoneList::getNextCall() { if ( this->m_calls.empty() ) { throw NoAvailableCallException(); } CallQueue::nth_index<CALL_NEXT_CALL_TIME>::type::iterator pos = this->m_calls.get<CALL_NEXT_CALL_TIME>().begin(); return *pos; } Call * PhoneList::popAvailableCall() { Call * c = this->getNextCall(); if ( c->getNextCallTime() > LocalTime::getInst()->getCachedTime() ) { throw NoAvailableCallException(); } CallQueue::nth_index<CALL_NEXT_CALL_TIME>::type & timeIndex = this->m_calls.get<CALL_NEXT_CALL_TIME>(); timeIndex.erase( timeIndex.begin() ); /*************BELIEVED THAT ERROR ORIGINATES HERE****************/ return c; } %%%END MY CODE%%% %%%START GDB BACKTRACE%%% #0 0x000000000044a7fd in Database::AQM::QueueEngine::PhoneList::popAvailableCall (this=<value optimized out>) at /usr/include/boost/multi_index/detail/ord_index_node.hpp:274 a274 while(x!=root&&(x==0 || x->color()==black)){ (gdb) backtrace #0 0x000000000044a7fd in Database::AQM::QueueEngine::PhoneList::popAvailableCall (this=<value optimized out>) at /usr/include/boost/multi_index/detail/ord_index_node.hpp:274 #1 0x000000000044664c in Database::AQM::QueueEngine::Controller::getCall (this=0x6d54d0) at Controller.cpp:83 #2 0x0000000000411d55 in Database::AQM::Controller::getCall (this=<value optimized out>) at Controller.cpp:75 #3 0x000000000041169b in Control::AQM::Controller::getCall (this=<value optimized out>) at Controller.cpp:27 #4 0x000000000040a01b in Boundary::AQM::RequestSocket::Controller::getCall (this=<value optimized out>) at Controller.cpp:43 #5 0x000000000045a703 in Boundary::AQM::RequestSocket::GetCallRequest::perform (this=<value optimized out>) at GetCallRequest.cpp:17 #6 0x0000000000410564 in Boundary::AQM::RequestSocket::RequestSocket::OnLine (this=0x6d31f0, l=@0x6d3340) at RequestSocket.cpp:30 #7 0x0000000000483829 in TcpSocket::ReadLine (this=0x6d31f0) at TcpSocket.cpp:810 #8 0x0000000000480a9c in SocketHandler::Select (this=0x42802b90, tsel=0x42802b70) at SocketHandler.cpp:395 #9 0x0000000000482e25 in SocketHandler::Select (this=0x2aaab04c8b98, sec=<value optimized out>, usec=1297040160) at SocketHandler.cpp:227 #10 0x000000000040ee6b in Boundary::AQM::RequestSocket::RequestPoller::run (this=0x2aaab0000e40) at RequestPoller.cpp:84 #11 0x00002aaaaad15c3f in boost::function0<void, std::allocator<boost::function_base> >::operator() () from /usr/lib64/libboost_thread.so.2 #12 0x00002aaaaad156bf in boost::thread_group::join_all () from /usr/lib64/libboost_thread.so.2 #13 0x0000003aa56062f7 in start_thread () from /lib64/libpthread.so.0 #14 0x0000003aa4ace86d in clone () from /lib64/libc.so.6 #15 0x0000000000000000 in ?? () %%%END GDB BACKTRACE%%%

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Question on boost multi-index container erase method
by Ramesh 09 Oct '08

09 Oct '08

Hello Joaquin, I am trying to erase a record in the container based on keys - in my case both the keys are ordered and unique and I need to have ways to delete records based on either of the keys. I tried to erase an element based on key2 & I got the following error: "error: no matching function for call to 'boost::multi_index ....<Error runs for more than a page> :erase(boost::multi_index::detail::index_iterator <boost::multi_index::detail::ordered_index_node<boost::multi_index::detail ::index_node_base<MyMap> > >&)' The compiler is perhaps complaining that I havent provided a prototype for erase in the map? In my case I wish to erase the record pointed by the iterator (In another class I had a single index and I didnt have the need to provide a prototype, is it because I have two 'unsigned long' keys that the compiler expects a prototype? )- Kindly help me fix this error. My code is posted as below: Thanks /R --- //fwd decl class A; struct MyMap { unsigned long key1; unsigned long key2; A *pObj; MyMap(unsigned long param_key1, unsigned long param_key2, A *param_pObj): key1(param_key1), key2(param_key2), pObj(param_pObj){} ~LCMap(){ key1 = 0; key2 = 0; pObj = 0; } }; struct key1{}; struct key2{}; typedef multi_index_container< MyMap, indexed_by< ordered_unique< tag <key1>, BOOST_MULTI_INDEX_MEMBER(MyMap, unsigned long, key1)>, ordered_unique< tag <key2>, BOOST_MULTI_INDEX_MEMBER(MyMap, unsigned long, key2)> > >tMapDef; class MyWrap { private: MyMap MyContainer; .. public: insert(UINT32, UINT32, A *); erasebykey2(unsigned long); }; bool MyWrap::erasebykey2(unsigned long param_key2) { bool ret = FALSE; typedef tMapDef::index<key2>::type tKey2Type; tKey2Type& key2_index = MyContainer.get<key2>(); tMapDef::index_iterator<key2>::type it = key2_index.find(param_key2); if (it == key2_index.end()) { cout << "No matching Recs with key2" <<endl<<; return FALSE; } tMapDef::size_type status = MyContainer.erase(it); }

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[python] Adding a path to sys.path
by Robert Dailey 08 Oct '08

08 Oct '08

Hi, I was wondering if the code below is correct for adding a path to sys.path in Python. Note that this will occur before any modules have been executed/imported through Boost.Python. I'm also embedding the interpreter, which is why I am doing this. I'm not sure how it can obtain the sys.__dict__ when I haven't imported sys, so explanation on this would be helpful for me. using namespace boost::python; using namespace boost::filesystem; object sys = GetNamespace( "sys" ); list syspath( sys["path"] ); syspath.insert( 0, complete( path ).file_string() ); sys["path"] = syspath; Note that "path" is a boost::filesystem::path object containing the path I wish to add to sys.path.

2 4

The Placeholders _1 and _2
by Missing Rainbow 08 Oct '08

08 Oct '08

Hi All, I am going through Chapter 3 of the MPL book ("A Deeper Look at Metafunctions") and have some questions on the placeholders _1 and _2. They are first introduced in the section 3.1.5 as follows: typename mpl::transform<D1, D2, mpl::minus<_1, _2> >::type I understand from the context that _1 represents D1 and _2 represents D2. From this I understood that _1 will represent the first template argument and _2 will represent the 2nd template argument. This made sense in this context. But later I came across the following in section 3.3: template <class X> struct two_pointers : twice<boost::add_pointer<_1>, X> {}; In this context, it looks like _1 represents X, which is the 2nd template argument. So what exactly _1 and _2 represents? The book doesn't seem to define them. While I haven't completely read the book yet, if it is defined at some other place, it would have been helpful to provide a cross-reference when they are first introduced in chapter 3. Can anybody provide a reference that explains what is a placeholder and what _1 and _2 mean? And what is the maximum number of placeholders? Thank you. Rgds, anna -- Two Party Fraud: Staged Presidential Debates http://missingrainbow.blogspot.com/2008/10/two-party-fraud-staged-president…

2 1

[boost-users][serialization] porting to windows ce?
by Bobby Nations 08 Oct '08

08 Oct '08

All, I've been working to get boost-serialization running on a Windows CE (actually Pocket PC 2003) device these last few days, and have hit a snag. Could anyone help me with what might be causing the following errors in the operators.hpp file? c:\Documents and Settings\388572\Desktop\sandbox\Boost_1_34_1\boost\libs\serialization\vc 7ide\..\..\..\boost/operators.hpp(699) : error C3083: 'detail': the symbol to the left of a '::' must be a type It happens at this section of code: namespace boost { // A type parameter is used instead of a plain bool because Borland's compiler // didn't cope well with the more obvious non-type template parameter. namespace detail { struct true_t {}; struct false_t {}; } // namespace detail // Unspecialized version assumes that most types are not being used for base // class chaining. We specialize for the operator templates defined in this // library. template<class T> struct is_chained_base { ::boost::detail::false_t value; }; The error happens at the '::boost::detail::false_t value' line. So far, I've been surrounding any mentions of the locale header file or it's attendant classes with '#ifndef BOOST_NO_STD_LOCALE ... #endif' blocks, which allowed me to compile about half of the .cpp files. I also added code to use Microsoft's WideCharToMultiByte() and MultiByteToWideChar() methods rather than using the std::wctomb() and std::mbtowc() . Can anyone explain why the above code throws errors? It seems to be te final remaining hurdle to getting this working (well, sort of working anyway). Thanks, Bobby Nations

1 0

[Boost.Bimap] templated Bimaps and tagging; efficiency
by Christoph Duelli 08 Oct '08

08 Oct '08

I'd like to replace a bidirectional mapping (2 std::maps so far) with Boost.Bimap. Being based on Boost.MultiIndex I hope there are some space savings there (also I could not find specifics in the docs). I have run into some questions/issues that I hope someone can shed light upon. i) I insert a name/value pair like: typedef boost::bimap<std::string, int> MyBimap; MyBimap myBimap; bool ok = myBimap.insert( typename MyBimap::value_type(name,val) ).second; Is it possible (w/o checking afterwards) to find out *why* the insert failed? (It might be a duplicate on the left or the right side. I want to print a helpful debug message...) ii) I would like to use a Bimap in a templated class: Works ok. When I try to tag the bimap, I get the following errors (using gcc 4.1.2) error: expected primary-expression before 'template' error: expected `;' before 'template' (The errors are the calls to by<country>() // wrapped tagged_simple_bimap.cpp from the Bimap docs in a template class: template<typename T> class X { typedef bimap < tagged< std::string, country >, tagged< T , place > > results_bimap; ... }; (I have attached the modified example.) Tagging works if the bimap definition does contain templated types. Any ideas what I am doing wrong? iii) I need the order of my insertions at one place in my code. Do I lose lookup efficiency (on the left side) when I declare my map as: typedef bimap <vector_of<std::string>, int> (My (bi)map is initialized once and then used for lookups only. Is it better in that case to store the insertion order in a separate vector? Or should I go for the more awe-inspiring Boost.Multimap if I want a Bimap (with efficient lookup) *and* have access to the insertion order? ) iv) What is the difference between: typedef bimap< std::string, int, list_of_relation> ...; and typedef bimap< vector_of<std::string>, int> ...; Thank you for a helpful library (collection). Christoph

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[filesystem] Problem mixing read and write on io fstream
by Sachin Garg 08 Oct '08

08 Oct '08

I have a program which opens a boost fstream in binary input+output mode, creating the file if it doesn't exists. But writing doesn't works after reading, it must be something obvious that I am not aware of. filename is a wpath. f.open(filename,ios::in | ios::out | ios::binary | ios::trunc) The program flow is 1) write some data 2) read the data 3) overwrite old data //this fails I am aware that mixing reading and writting is complicated due to buffering and as far as I know the solution is to do a seekg or seekp when changing between reading and writting, I am doing this between 1, 2 and 3. In 'my' program, writting in step 3 fails. I wrote a simple program that does just the above 3 steps with seeks and it works but in my program, it sets the failbit. After lots of debugging in internal fstream code I figured that an internal flag _IOREAD gets set somehow in step 2 which indicates that the stream is now readonly and causes subsequent writes to fail. It also seems that _IOREAD is set anytime any read operation is done on a read+write file, is this correct? And now how do I 'unset' this flag? I tried calling f.clear and f.seekp but that doesnt helps. What might be special in my program that causes this read-mode flag to remain set while this doesn't happens in a barebone/simple test program. I am not doing anything except f.seekg, f.get, f.read. Sachin Garg ps. If it matters, I am using visual studio 9.0. Problem might not be boost specific as boost only uses stl fstream but any help will be really useful.

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Re: [Boost-users] [program_options] linker error LNK2005 (symbol already defined in object)
by Andrei LIHU 08 Oct '08

08 Oct '08

I think I had this problem too a long time ago. I fixed that in \include\boost\boost\program_options\variables_map.hpp. Here is the standard Unix diff for that file. 128c128 < friend void store(const basic_parsed_options<char>& options, --- > friend void BOOST_PROGRAM_OPTIONS_DECL store(const basic_parsed_options<char>& options, -- Check if it works this way for you. Kind regards, Andrei LIHU -------------------- C++ Software Developer +40742545392

1 0

Boost Program Options Optional Value (request for implicit_value() behaviour change to allow space)
by Andrei LIHU 08 Oct '08

08 Oct '08

Description of the real problem: - let "-b" be the name of the option - it disables, if not present in command line, the general app logging - it enables, if present in command line, the general app logging in a default chosen logfile - it enables, if present in command line with a string argument, the general app logging into the file specified as string argument Usage example: >> program_name (no logging) >> program_name -b (logging enabled; goes to logfile.log) >> program_name -b "C:\otherlogfile.log" (logs where specified) So far I found a solution based on implicit_value() behaviour, with "-b" of type string, but my main problem is that in this case I am forced to enter the value to be adjacent to "-b" (e.g. -b"C:\otherlogfile.log"). The desired form would be the one with a space between, in order to maintain our backward compatibility of scripts (e.g: -b "C:\otherlogfile.log"). Can you help me with a good solution? (Even solutions that crack into the source of boost program options library are appreciated.) Thank you for your time. -- Kind regards, Andrei LIHU -------------------- softNRG C++ Software Developer +40742545392

2 2

[multi_array] Support for begin( ) & end( )?
by Robert Jones 08 Oct '08

08 Oct '08

Does multi_array support begin( ) & end( ) methods? If so what are their semantics? Does the returned iterator iterate over the first subscript, or over the whole container, or something else? Thanks - Rob.

2 2

[release mgt] Eric Niebler joining release management team
by Beman Dawes 08 Oct '08

08 Oct '08

Eric Niebler is joining the release management team. Eric will be helping out with general release management and quality control. Like Rene Rivera and Daniel James, he will backup Beman so that release management isn't dependent on any single person. Thanks to Eric for agreeing to help out! --Beman

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[Graph] Two issues: Incorrect behavior with Prim's MST algorithm and Fruchterman-Reingold layout
by David Gleich 08 Oct '08

08 Oct '08

Hi, There are two issues in this note. Sorry for bundling them, but they both deal with incorrect behavior when the graph has self-loops. First issue: I found an problem with Prim's minimum spanning tree algorithm and graphs with self-loops. I looked through the documentation for the function and didn't see any notes about self-loops (which can cause the problem). The program at the end of this message doesn't produce a complete spanning tree on a connected graph, but it should. This issue shows up with any graph where a vertex has a self-loop with a lower weight than any of the other edges from that vertex. The cause of the issue is the relax function used in Dijkstra's algorithm. When computing a spanning tree, it shouldn't compare on self-loops. When used with the combine function for Prim's algorithm, it'll always pick out these self-loops. I'd love to see this issue fixed so I don't have to special case calls to Prim's algorithm to make sure all self-loops aren't there. The only way I see to do it is to make a special version of the Dijkstra code for Prim's algorithm. (It feels like the ramifications of changing relax.hpp could be considerably greater.) One possibility for a better fix is make a new version of Dijkstra's algorithm where the relax function is a template parameter. Prim's algorithm can then replace the entire relax behavior to get the behavior it needs. Second issue: The fruchterman_reingold_force_directed_layout function will always divide by 0 when computing the layout of a graph with self-loops. This issue has a rather simple fix. --- lib/boost_trunk/boost/graph/fruchterman_reingold.hpp +++ matlab-bgl/work/libmbgl/yasmic/boost_mod/fruchterman_reingold.hpp @@ -284,6 +284,9 @@ for (tie(e, e_end) = edges(g); e != e_end; ++e) { vertex_descriptor v = source(*e, g); vertex_descriptor u = target(*e, g); + if (v == u) { + continue; // self-loops should have no effect on the layout + } Dim delta_x = position[v].x - position[u].x; Dim delta_y = position[v].y - position[u].y; Dim dist = sqrt(delta_x * delta_x + delta_y * delta_y); Please let me know if there are any questions about these issues. Thanks, David Gleich /* tested with g++ 4.2 and boost 1.36.0 */ #include <iostream> #include <boost/graph/adjacency_list.hpp> #include <boost/graph/properties.hpp> #include <boost/graph/graph_traits.hpp> #include <boost/property_map.hpp> #include <vector> #include <boost/graph/prim_minimum_spanning_tree.hpp> using namespace boost; using namespace std; int main(int argc, char** argv) { typedef adjacency_list < vecS, vecS, undirectedS, property<vertex_distance_t, int>, property < edge_weight_t, double > > graph; graph g(3); property_map<graph, edge_weight_t>::type weightmap = get(edge_weight, g); graph_traits<graph>::edge_descriptor e; bool inserted; tie(e,inserted) = add_edge(0,1,g); weightmap[e]=1; cout << inserted << endl; tie(e,inserted) = add_edge(0,2,g); weightmap[e]=1; cout << inserted << endl; tie(e,inserted) = add_edge(1,2,g); weightmap[e]=1; cout << inserted << endl; tie(e,inserted) = add_edge(2,2,g); weightmap[e]=0.1; cout << inserted << endl; std::vector < graph_traits < graph >::vertex_descriptor > p(num_vertices(g)); prim_minimum_spanning_tree(g, &p[0]); for (size_t i=0; i != p.size(); i++) { std::cout << "mst parent[" << i << "] = " << p[i] << std::endl; } return 0; } Output: 1 1 1 1 mst parent[0] = 0 mst parent[1] = 0 mst parent[2] = 2 Desired output: mst parent[2] = 0 ( or mst parent[2] = 1 )

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[thread] boost-1.36's upgrade_to_unique_lock doesn't compile on C++0x mode
by Rodolfo Lima 08 Oct '08

08 Oct '08

The following code doesn't compile with gcc-4.3.2 (and gcc-4.4.0), and boost-1.36 (and boost-trunk of 2008/10/07) when using -std=c++0x on linux. #include <boost/thread/shared_mutex.hpp> int main() { boost::shared_mutex mtx; boost::upgrade_lock<boost::shared_mutex> lk(mtx); boost::upgrade_to_unique_lock<boost::shared_mutex> lk2(lk); } gcc spits: g++-4.4.0-alpha20081003 -std=c++0x -I src/boost-trunk teste.cpp -o teste In file included from src/boost-trunk/boost/thread/pthread/mutex.hpp:11, from src/boost-trunk/boost/thread/mutex.hpp:16, from src/boost-trunk/boost/thread/pthread/shared_mutex.hpp:12, from src/boost-trunk/boost/thread/shared_mutex.hpp:16, from teste.cpp:1: src/boost-trunk/boost/thread/locks.hpp: In destructor 'boost::upgrade_to_unique_lock<Mutex>::~upgrade_to_unique_lock() [with Mutex = boost::shared_mutex]': teste.cpp:8: instantiated from here src/boost-trunk/boost/thread/locks.hpp:807: error: no match for 'operator=' in '*((boost::upgrade_to_unique_lock<boost::shared_mutex>*)this)->boost::upgrade_to_unique_lock<boost::shared_mutex>::source = boost::move [with Mutex = boost::shared_mutex](((boost::unique_lock<boost::shared_mutex>&&)(&((boost::upgrade_to_unique_lock<boost::shared_mutex>*)this)->boost::upgrade_to_unique_lock<boost::shared_mutex>::exclusive)))' src/boost-trunk/boost/thread/locks.hpp:643: note: candidates are: boost::upgrade_lock<Mutex>& boost::upgrade_lock<Mutex>::operator=(boost::upgrade_lock<Mutex>&) [with Mutex = boost::shared_mutex] src/boost-trunk/boost/thread/locks.hpp:694: note: boost::upgrade_lock<Mutex>& boost::upgrade_lock<Mutex>::operator=(boost::detail::thread_move_t<boost::upgrade_lock<Mutex> >) [with Mutex = boost::shared_mutex] src/boost-trunk/boost/thread/locks.hpp:701: note: boost::upgrade_lock<Mutex>& boost::upgrade_lock<Mutex>::operator=(boost::detail::thread_move_t<boost::unique_lock<Mutex> >) [with Mutex = boost::shared_mutex] src/boost-trunk/boost/thread/locks.hpp: In constructor 'boost::unique_lock<Mutex>::unique_lock(boost::upgrade_lock<Mutex>&&) [with Mutex = boost::shared_mutex]': src/boost-trunk/boost/thread/locks.hpp:801: instantiated from 'boost::upgrade_to_unique_lock<Mutex>::upgrade_to_unique_lock(boost::upgrade_lock<Mutex>&) [with Mutex = boost::shared_mutex]' teste.cpp:8: instantiated from here src/boost-trunk/boost/thread/locks.hpp:775: error: request for member 'unlock_upgrade_and_lock' in '((boost::unique_lock<boost::shared_mutex>*)this)->boost::unique_lock<boost::shared_mutex>::m', which is of non-class type 'boost::shared_mutex*' It compiles fine in non std++0x mode Regards, Rodolfo Lima

1 0

boost::python -- passing containers of shared pointers as arguments and getting automatic conversion
by Eric Jonas 08 Oct '08

08 Oct '08

Hello! I've found several examples of code on the internet where people are trying to convert from a native python container type to a std::container. Using those as a template, I'm trying to convert from a python tuple of objects wrapped by boost::python to a std::vector of boost::shared_ptrs. Example c++: http://pastebin.com/m3b198a9c Example python showing the code running: http://pastebin.com/m400f17e1 Example output: http://pastebin.com/m1b0eb94e [all pasted at the end of the mail] [Please note these only work if you've hacked your boost/shared_ptr.hpp to make everything public] Unfortunately, I'm running into a problem with extract<shared_ptr<T>> creating a -new- shared pointer pointing to the raw pointer -within- the existing shared pointer -- so no reference-comanaging occurs. I've hacked my shared_ptr.hpp to let me examine the refcounted struct inside the shared pointer. What I see when I run things is as follows: [jonas@hamiltonian core]$ python broken_test.py Foo 0 is at 88276256 with reference counter 8276288 Foo 1 is at 88276352 with reference counter 8276384 Foo 2 is at 88276320 with reference counter 8276416 Extraction of object pointing to 88276256 but with reference counter 0x7f54c0 Extraction of object pointing to 88276352 but with reference counter 0x7f3f80 Extraction of object pointing to 88276320 but with reference counter 0x7e4a00 Note what this is saying: While internal to my FooHolder, the shared pointers point to location X and reference-counting struct Y, within the converter they're being turned into new shared pointers, still managing the raw pointer X but with a different reference-counting-struct Z. This is most perplexing, and I worry it might be the result of interaction with the fact that in my example code, I'm explicitly using the shared pointer to manage the reference count: class_<Foo, pFoo_t>("Foo"); In any case, I'm quite stumped, and have a -ton- of places in my main codebase where stl containers are passed around containing shared_ptrs. I asked around on IRC but everyone seemed stumped too. Any help would be greatly appreciated. Thanks! ...Eric Jonas broken.cc: #include <boost/python.hpp> #include <boost/python/class.hpp> #include <boost/python/converter/shared_ptr_from_python.hpp> #include <boost/python/implicit.hpp> #include <boost/python/module.hpp> #include <boost/variant/apply_visitor.hpp> #include <boost/shared_ptr.hpp> #include <vector> using namespace boost::python; using namespace std; template <class T1> struct vector_from_tuple_of_shared { vector_from_tuple_of_shared() { converter::registry::push_back(&convertible, &construct, boost::python::type_id<std::vector<T1> >()); } static void* convertible(PyObject* obj_ptr) { handle<> x(borrowed(obj_ptr)); boost::python::tuple o(x); for (int i = 0; i < boost::python::len(o); i++) { extract<T1> obj(o[i]); if (!obj.check() ) { return 0; } } return obj_ptr; } static void construct(PyObject* obj_ptr, converter::rvalue_from_python_stage1_data* data) { handle<> x(borrowed(obj_ptr)); std::vector<T1> value; boost::python::tuple o(x); for (int i = 0; i < boost::python::len(o); i++) { extract<T1> obj(o[i]); T1 s1 = obj; std::cout << "Extraction of object pointing to " << ios::hex << (int64_t) s1.get() << " but with reference counter " << s1.pn.pi_ << std::endl; value.push_back(obj); } void* storage = ( (converter::rvalue_from_python_storage<std::vector<T1> >*) data)->storage.bytes; new (storage) std::vector<T1>(value); data->convertible = storage; } }; class Foo { }; typedef boost::shared_ptr<Foo> pFoo_t; class FooHolder { public: std::vector<pFoo_t> foos_; pFoo_t createFoo() { pFoo_t f(new Foo()); foos_.push_back(f); return f; } void printFooStatus() { for(int i = 0; i < foos_.size(); i++) { std::cout << "Foo " << i << " is at " << ios::hex << (int64_t)foos_[i].get() << " with reference counter " << (int64_t)foos_[i].pn.pi_ << std::endl; } } }; void doStuff(std::vector<pFoo_t> stuff) { } BOOST_PYTHON_MODULE(broken) { class_<Foo, pFoo_t>("Foo"); class_<FooHolder>("FooHolder") .def("createFoo", &FooHolder::createFoo) .def("printFooStatus", &FooHolder::printFooStatus) ; def("doStuff", &doStuff); vector_from_tuple_of_shared<pFoo_t>(); } Broken.py: import broken fh = broken.FooHolder() f1 = fh.createFoo() f2 = fh.createFoo() f3 = fh.createFoo() fh.printFooStatus() broken.doStuff((f1, f2, f3)) Output: [again, requires modified shared_ptr.hpp] jonas@hamiltonian core]$ make broken.so g++ -O2 -g -pg -I/usr/local/include -fPIC -I../threadpool/threadpool/include -pthread -fPIC -I/usr/include/`/usr/bin/python -c "import sys; (a, b, c, t, n) = sys.version_info; print 'python%d.%d' % (a, b),"` -c broken.cc g++ broken.o -L/usr/local/lib -lgsl -lgslcblas -lm -lboost_unit_test_framework -lboost_program_options -g -pg -lboost_thread -lboost_signals -o broken.so -shared -I/usr/include/`/usr/bin/python -c "import sys; (a, b, c, t, n) = sys.version_info; print 'python%d.%d' % (a, b),"` \ -L/usr/lib -lpython2.4 -lboost_python [jonas@hamiltonian core]$ python broken_test.py Foo 0 is at 88276256 with reference counter 8276288 Foo 1 is at 88276352 with reference counter 8276384 Foo 2 is at 88276320 with reference counter 8276416 Extraction of object pointing to 88276256 but with reference counter 0x7f54c0 Extraction of object pointing to 88276352 but with reference counter 0x7f3f80 Extraction of object pointing to 88276320 but with reference counter 0x7e4a00

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[Graph] Issue with is_straight_line_drawing?
by David Gleich 08 Oct '08

08 Oct '08

Hi, I'm concerned about the output I'm getting from the is_straight_line_drawing function in the Boost Graph library. My understanding was that it should report true when the graph and positions are a planar embedding (no edge crossings). Based on this understanding, I thought the code listed at the end of the message should say that the drawing for a clique on 4 vertices, with positions on a square, is not planar (see the picture below). This arrangement has one edge crossing. The function outputs that the graph is a plane drawing. Did I misunderstand what the is_straight_line_drawing function is supposed to do? Thanks, David Gleich #include <iostream> #include <boost/graph/adjacency_list.hpp> #include <boost/graph/properties.hpp> #include <boost/graph/graph_traits.hpp> #include <boost/property_map.hpp> #include <vector> #include <boost/graph/is_straight_line_drawing.hpp> using namespace boost; //a class to hold the coordinates of the straight line embedding struct coord_t { std::size_t x; std::size_t y; }; int main(int argc, char** argv) { typedef adjacency_list < vecS, vecS, undirectedS, property<vertex_index_t, int> > graph; graph g(4); // make the clique on 4 vertices add_edge(0,1,g); add_edge(0,2,g); add_edge(0,3,g); add_edge(1,2,g); add_edge(1,3,g); add_edge(2,3,g); //Set up a property map to hold the mapping from vertices to coord_t's typedef std::vector< coord_t > straight_line_drawing_storage_t; typedef boost::iterator_property_map < straight_line_drawing_storage_t::iterator, property_map<graph, vertex_index_t>::type > straight_line_drawing_t; straight_line_drawing_storage_t straight_line_drawing_storage (num_vertices(g)); straight_line_drawing_t straight_line_drawing (straight_line_drawing_storage.begin(), get(vertex_index,g) ); /* should be 0 / | \ 3--|--1 \ | / 2 which is not a plane drawing. */ straight_line_drawing[0].x = 1; straight_line_drawing[0].y = 2; straight_line_drawing[1].x = 2; straight_line_drawing[1].y = 1; straight_line_drawing[2].x = 1; straight_line_drawing[2].y = 0; straight_line_drawing[3].x = 0; straight_line_drawing[3].y = 1; if (is_straight_line_drawing(g, straight_line_drawing)) std::cout << "Is a plane drawing." << std::endl; else std::cout << "Is not a plane drawing." << std::endl; return 0; } /* Compiling and example $ g++ -v Using built-in specs. Target: x86_64-linux-gnu Configured with: ../src/configure -v --enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.2 --program-suffix=-4.2 --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu7) $g++ is_straight_line_drawing.cpp -I/home/dgleich/dev/lib/boost_1_36_0/ $./a.out Is a plane drawing. Should be Is not a plane drawing. */

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boost::mpl::map and boost::mpl::for_each -- code does not compile -- any help appreciated
by peter_foelsche＠agilent.com 07 Oct '08

07 Oct '08

#include <boost/mpl/map.hpp> #include <iostream> #include <boost/mpl/at.hpp> #include <boost/mpl/placeholders.hpp> #include <boost/mpl/for_each.hpp> typedef boost::mpl::map< boost::mpl::pair< boost::mpl::int_<0>, boost::mpl::int_<3> >, boost::mpl::pair< boost::mpl::int_<1>, boost::mpl::int_<2> >, boost::mpl::pair< boost::mpl::int_<2>, boost::mpl::int_<1> >, boost::mpl::pair< boost::mpl::int_<3>, boost::mpl::int_<0> > > CMapForward; typedef boost::mpl::map< boost::mpl::pair< boost::mpl::int_<0>, boost::mpl::int_<3> >, boost::mpl::pair< boost::mpl::int_<1>, boost::mpl::int_<2> >, boost::mpl::pair< boost::mpl::int_<2>, boost::mpl::int_<1> >, boost::mpl::pair< boost::mpl::int_<3>, boost::mpl::int_<0> > > CMapReverse; template<typename I2E_PAIR, typename E2I> struct CCreatePair:boost::mpl::pair<typename I2E_PAIR::first, boost::mpl::at<E2I, typename I2E_PAIR::second> > { }; struct CDoSomething { template<unsigned int INDEX0, unsigned int INDEX1> inline void operator()(const boost::mpl::pair<boost::mpl::int_<INDEX0>, boost::mpl::int_<INDEX1> > &_r) const { std::cout << INDEX0 << " " << INDEX1 << "\n"; } }; int main(int, char**) { boost::mpl::for_each< CMapForward, template CCreatePair<boost::mpl::_1, CMapReverse> >(CDoSomething()); return 0; } "The first point (using an init() function in preference to a constructor) is bogus. Using constructors and exception handling is a more general and systematic way of dealing with resource acquisition and initialization errors. This style is a relic of pre-exception C++." -- Stroustrup

2 1

[Graph] Subgraphs with bundled properties
by Cooprider, Nathan (US NonSSA) 07 Oct '08

07 Oct '08

I am having some difficulty getting bundled properties working with subgraphs in the BGL. Some sample code is below. If I comment out the subgraph line and rename "PlainGraph" to be just "Graph" then the code compiles. As it is written below, I get a type error (copied below the code below). Any help/pointers would be appreciated. Thank you. 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; }; typedef adjacency_list < setS, setS, directedS, 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); put(vertex_index, g, tmp, 42); } Here is the error: /home/ncooprid/local/include/boost/graph/subgraph.hpp: In member function 'typename boost::property_traits<IndexMap>::reference boost::subgraph_local_property_map<GraphPtr, PropertyMap, Tag>::operator[](typename boost::property_traits<IndexMap>::key_type) const [with GraphPtr = boost::subgraph<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, int, Node>, boost::property<boost::edge_index_t, int, boost::no_property>, boost::no_property, boost::listS> >*, PropertyMap = boost::adj_list_vertex_property_map<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, int, Node>, boost::property<boost::edge_index_t, int, boost::no_property>, boost::no_property, boost::listS>, int, int&, boost::vert ex_index_t>, Tag = boost::vertex_index_t]': /home/ncooprid/local/include/boost/graph/subgraph.hpp:843: instantiated from 'void boost::put(Property, boost::subgraph<Graph>&, const Key&, const Value&) [with G = boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, int, Node>, boost::property<boost::edge_index_t, int, boost::no_property>, boost::no_property, boost::listS>, Property = boost::vertex_index_t, Key = void*, Value = int]' error.cpp:24: instantiated from here /home/ncooprid/local/include/boost/graph/subgraph.hpp:738: error: conversion from 'boost::subgraph_local_property_map<boost::subgraph<boost::adjacency_lis t<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, int, Node>, boost::property<boost::edge_index_t, int, boost::no_property>, boost: :no_property, boost::listS> >*, boost::adj_list_vertex_property_map<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, int, Node>, boost::property<boost::edge_index_t, int, boost::no_property>, boost::no_property, boost::listS>, int, int&, boost::vertex_index_t>, boost::vertex_index_t>' to non-scalar type 'boost::adj_list_vertex_property_map<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, int, Node>, boost::property<boost::edge_index_t, int, boost::no_property>, boost::no_property, boost::listS>, int, int&, boost::vertex_index_t>' requested

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Re: [Boost-users] Error:" Non-const function called for const object" on Sun CC while using boost::multi_index::multi_index_container
by JOAQUIN M. LOPEZ MUÑOZ 07 Oct '08

07 Oct '08

De: Alexander Vinokur [Alexander.Vinokur(a)amdocs.com] Enviado el: martes, 07 de octubre de 2008 18:28 Para: boost-users(a)lists.boost.org CC: JOAQUIN M. LOPEZ MUÑOZ Asunto: RE: Error:" Non-const function called for const object" on Sun CC while using boost::multi_index::multi_index_container > > Joaquin, thank you. > > Here code I compiled. > > // --- File foo3.cpp --- > [...] > const Bar* p4 = new Bar; > p4->~Bar(); // line 19: Error: Non-const function > Bar::__SLIP.DELETER__A() called for const object. OK, seems like the bug we were after, if only in a slightly different guise (deleting a const T* works, but directly calling ~T() on a const object does not). Alex, can you do the following? Please try replacing the /boost/detail/allocator_utilities.hpp file in your local Boost copy with the attached file and rebuild the multi_index_container code that was failing. Does this fix it? If so, I'll commit this version into the trunk so that it'll be available in Boost 1.38 (though you can use it now with your local Boost copy, of course). Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

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It is possible to build a static version of boost for the MACOS
by kittymaguire 07 Oct '08

07 Oct '08

Hi I have tried to build the boost libraries on the MacOS as a static library by giving bjam the --buid_type=static but it still built the dynamic version of the libraries. In order to get my application to run, the library load location has to be either in /usr/lib or from the folder where the application started. The problem is that our application is based on xulrunner, and we use a stub application to start xulrunner which is in a different folder. We use the boost libraries in an XPCOM dylib which is loaded from the resources components folder, and for this dylib to be loaded correctly the boost libraries need to placed in the stub application folder. The first time you start the application it will run on but will then fail to run the second time you start it as libraries are being loaded from a location that xulrunner allows it components to run from. So either I need to build the static version of the libraries or change the runtime load path of the libraries. Does anyone know how I do any of these Thanks -- View this message in context: http://www.nabble.com/It-is-possible-to-build-a-static-version-of-boost-for… Sent from the Boost - Users mailing list archive at Nabble.com.

8 17

Fw: Problem linking to Boost Filesystem Library
by DDBeatty＠dstsystems.com 07 Oct '08

07 Oct '08

I found the define BOOST_ALL_DYN_LINK in the config/auto-link headers which causes BOOST_FILESYSTEM_DECL to defined as __declspec(dllimport) and this solved the problem. However, I am not sure why it was necessary to set this define. The headers know that I am using VS2005 (they add vc80 to the library name) and that I am using dynamic libraries (doesn't insert the s in the name). Seems like it should be redundant information to have to define BOOST_ALL_DYN_LINK. Thanks, Doug Beatty ----- Forwarded by Douglas D. Beatty/MF Support/DST/US on 10/06/2008 04:31 PM ----- Douglas D. Beatty/MF Support/DST/US To boost-users(a)lists.boost.org 10/06/2008 03:15 cc PM Subject Problem linking to Boost Filesystem Library I am getting an unresolved external error when auto-linking to the Boost Filesystem Library Compiler: Visual Studio 2005 Boost Library Version: 1.36.0 The error: packagereport.obj : error LNK2001: unresolved external symbol "class boost::system::error_code boost::filesystem::detail::throws" (?throws@detail@filesystem@boost@@3Verror_code@system@3@A) The Boost Libraries were compiled using Visual Studio 2005 as well. I compiled with BOOST_LIB_DIAGNOSTIC and got the following two lines in the output: Linking to lib file: libboost_system-vc80-mt-gd-1_36.lib Linking to lib file: libboost_filesystem-vc80-mt-gd-1_36.lib I added /verbose to the linker and got the following: Processed /DEFAULTLIB:libboost_system-vc80-mt-gd-1_36.lib Processed /DEFAULTLIB:libboost_filesystem-vc80-mt-gd-1_36.lib Searching ..\3rdParty\Boost\lib\libboost_system-vc80-mt-gd-1_36.lib: Found "class boost::system::error_category const & __cdecl boost::system::get_system_category(void)" (?get_system_category@system@boost@@YAABVerror_category@12@XZ) Referenced in packagereport.obj Loaded libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Found "class boost::system::error_category const & __cdecl boost::system::get_generic_category(void)" (?get_generic_category@system@boost@@YAABVerror_category@12@XZ) Referenced in packagereport.obj Loaded libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Found __IMPORT_DESCRIPTOR_boost_system-vc80-mt-gd-1_36 Referenced in libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Referenced in libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Loaded libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Found boost_system-vc80-mt-gd-1_36_NULL_THUNK_DATA Referenced in libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Loaded libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Searching ..\3rdParty\Boost\lib\libboost_filesystem-vc80-mt-gd-1_36.lib: Found "class boost::filesystem::file_status __cdecl boost::filesystem::detail::status_api(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class boost::system::error_code &)" (?status_api@detail@filesystem@boost@@YA?AVfile_status@23@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AAVerror_code@system@3@@Z) Referenced in packagereport.obj Loaded libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Found "class boost::system::error_code __cdecl boost::filesystem::detail::remove_api(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?remove_api@detail@filesystem@boost@@YA?AVerror_code@system@3@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) Referenced in packagereport.obj Loaded libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Found __IMPORT_DESCRIPTOR_boost_filesystem-vc80-mt-gd-1_36 Referenced in libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Referenced in libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Loaded libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Found boost_filesystem-vc80-mt-gd-1_36_NULL_THUNK_DATA Referenced in libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Loaded libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Using Dumpbin.exe I get the following: >From the dll: 68 43 00011E04 ?throws@detail@filesystem@boost@@3Verror_code@system@3@A >From the lib: ?throws@detail@filesystem@boost@@3Verror_code@system@3@A (class boost::system::error_code boost::filesystem::detail::throws) It looks like the decorated names in the lib and dll match the name that is being searched for by the linker and it looks like the linker found the lib file. Any ideas why this would not be linking? Also, I have tried disabling the auto-linking (using BOOST_ALL_NO_LIB) and linking manually, but I get the same error. Thanks, Doug Beatty ----------------------------------------- This e-mail and any attachments are intended only for the individual or company to which it is addressed and may contain information which is privileged, confidential and prohibited from disclosure or unauthorized use under applicable law. If you are not the intended recipient of this e-mail, you are hereby notified that any use, dissemination, or copying of this e-mail or the information contained in this e-mail is strictly prohibited by the sender. If you have received this transmission in error, please return the material received to the sender and delete all copies from your system.

2 1

Re: [Boost-users] Error:" Non-const function called for const object" on Sun CC while using boost::multi_index::multi_index_container
by Alexander Vinokur 07 Oct '08

07 Oct '08

Joaquin, thank you. Here code I compiled. // --- File foo3.cpp --- struct Bar { virtual ~Bar(){} }; int main() { Bar* p1 = new Bar; delete p1; Bar* p2 = new Bar; p2->~Bar(); const Bar* p3 = new Bar; delete p3; const Bar* p4 = new Bar; p4->~Bar(); // line 19: Error: Non-const function Bar::__SLIP.DELETER__A() called for const object. return 0; } // --------------------------- Compilation: % CC -V CC: Sun C++ 5.9 SunOS_sparc Patch 124863-01 2007/07/25 % CC -m64 -I/home/BOOST/boost_1_34_0 -library=stlport4 foo3.cpp "foo3.cpp", line 19: Error: Non-const function Bar::__SLIP.DELETER__A() called for const object. 1 Error(s) detected. Alex Vinokur This message and the information contained herein is proprietary and confidential and subject to the Amdocs policy statement, you may review at http://www.amdocs.com/email_disclaimer.asp

1 0

fast_pool_allocator question
by Ta-Cheng Lin 07 Oct '08

07 Oct '08

Hi: I try fast_pool_allocator and it does not release memory. See the following program Any ideas? Thanks! -Kawasaki --- Begin --- #include <vector> #include <boost/pool/pool_alloc.hpp> #include <list> using namespace std; using namespace boost; #include "memusage.cpp" //-------------------------------------------------- void func() { list<int, fast_pool_allocator<int> > v; // list<int> v; for (int i = 0; i < 1000000; ++i) { v.push_back(i); } printf("2. MEM USAGE = %d\n", getMemUsage()); } //-------------------------------------------------- int main(int argc, char **argv) { printf("1. MEM USAGE = %d\n", getMemUsage()); func(); func(); func(); /// Exiting the function does NOT free the system memory allocated by the pool allocator // You must call // boost::singleton_pool<boost::pool_allocator_tag, sizeof(int)>::release_memory() // in order to force that printf("3. MEM USAGE = %d\n", getMemUsage()); boost::singleton_pool<boost::fast_pool_allocator_tag, sizeof(int)>::release_memory(); printf("4. MEM USAGE = %d\n", getMemUsage()); return 1; } --- END output 1. MEM USAGE = 11 MB 2. MEM USAGE = 35 2. MEM USAGE = 35 2. MEM USAGE = 35 3. MEM USAGE = 35 4. MEM USAGE = 35 // after release_memory() is called,

2 1

Error:" Non-const function called for const object" on Sun CC while using boost::multi_index::multi_index_container
by Alexander Vinokur 07 Oct '08

07 Oct '08

Hi, CC: Sun C++ 5.9 SunOS_sparc Patch 124863-01 2007/07/25 Boost 1.34 Here are fragments of code that produces error "Non-const function called for const object". // -------------------- struct Foo { int m_int1; int m_int2; int get1 () const; int get2 () const;; ~Foo(); }; int Foo::get1 () const; { return m_int1; } int Foo::get2 () const; { return m_int2; } Foo::~Foo() { } // -------------------- typedef boost::multi_index::composite_key < Foo, BOOST_MULTI_INDEX_CONST_MEM_FUN( Foo, int, get1), BOOST_MULTI_INDEX_CONST_MEM_FUN( Foo, int, get2) > FooKey; // -------------------- typedef boost::multi_index::multi_index_container < Foo, boost::multi_index::indexed_by < boost::multi_index::hashed_unique < FooKey > > > FooContainer; // ================== // This function produces compilation error void bar () { FooContainer fooContainer; } Error message: "/home/BOOST/boost_1_34_0/boost/detail/allocator_utilities.hpp", line 176: Error: Non-const function Foo::__SLIP.DELETER__H() called for const object. "/home/BOOST/boost_1_34_0/boost/multi_index/detail/index_base.hpp", line 105: Where: While instantiating "boost::detail::allocator::destroy<Foo>(const Foo*)". "/home/BOOST/boost_1_34_0/boost/multi_index/detail/index_base.hpp", line 105: Where: Instantiated from non-template code. Important. If destructor ~Foo() is not virtual then there are no errors. Alex Vinokur This message and the information contained herein is proprietary and confidential and subject to the Amdocs policy statement, you may review at http://www.amdocs.com/email_disclaimer.asp

2 1

[lambda] Serialising Lmanda functions
by Robert Jones 07 Oct '08

07 Oct '08

Is there a 'standard' solution to this problem? #include <list> #include <iostream> #include "boost/lambda/lambda.hpp" typedef std::list<unsigned> List; std::ostream & operator<<( std::ostream & s, const List & ); int main( ) { using namespace boost::lambda; List my_list; ( std::cout << _1 << "\n" )( my_list ); } The compiler cannot find a match for operator<<() because the operator and the type are defined in different namespaces, but it's really a nuisance! - Rob.

1 0

[multi_array] size( ) of views.
by Robert Jones 07 Oct '08

07 Oct '08

Am I correct in thinking that multi_array has a size() method which reports the first subscript, whereas views of multi_array do not support tht size() method? - Rob.

2 2

Can't get the bcp tool to work
by Z. S. O. 07 Oct '08

07 Oct '08

I'd like to copy all the files in the filesystem library using bcp to a folder. I'm using the command: ./bcp filesystem [destination path] However, the output I get is "no errors detected" and nothing has been copied to the destination. Am I doing something wrong? I'm on Mac OS X intel, but this exact same problem occurs on my Windows machine as well.

5 6

Re: [Boost-users] Can't get the bcp tool to work
by Z. S. O. 07 Oct '08

07 Oct '08

Looks like the issue was my fault. I used darwinports to install boost 1.35, but it didn't come with bcp so I built that separately from a 1.36 package I downloaded. I just downloaded boostpro on my Windows box and bcp works great now, so I'll just copy the resulting files onto my mac. Thank you all very much for the help. On Tue, Oct 7, 2008 at 12:00 AM, Marshall Clow <marshall(a)idio.com> wrote: > At 5:53 PM -0400 10/6/08, Z. S. O. wrote: > >> Hmm, here's the output for that: >> >> **** exception(225): memory access violation at address: 0x00000000: >> non-existent physical address >> ******** errors detected; see standard output for details ******** >> >> > Are you building from the trunk? > Check your build transcript .. see if Boost::System built correctly. > If it did not, update from svn and try again.... > -- > -- Marshall > > Marshall Clow Idio Software <mailto:marshall@idio.com> > > It is by caffeine alone I set my mind in motion. > It is by the beans of Java that thoughts acquire speed, > the hands acquire shaking, the shaking becomes a warning. > It is by caffeine alone I set my mind in motion. > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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Re: [Boost-users] [shared_ptr] Cannot include shared_ptr.hpp
by Alice Johnson 07 Oct '08

07 Oct '08

> Does it work if you define the macro BOOST_USE_WINDOWS_H in the project > settings? Yes it does - thanks. > I never used CLR stuff myself, but AFAIK one of the fundamentals is automatic > garbage collection (MS refers to this as "managed"). So everything relying on > the deterministic behavior of C++ ctors/dtors won't work. > I doubt anything in boost is written with automatic garbage collectors in > mind. This article regarding the boehmgc shows how to wrap stl containers > - http://www.ddj.com/cpp/184401632 > I'm new to this topic as well, so please correct me if I'm wrong so far and > with the following statement: there have to be clear interfaces between > automatic gc code and normal deterministic code. Mixing doesn't work out of > the box. > Best, > -- Maik I am using mixing. I have an unmanaged C++ library which is linked with a managed C++ dll. The unmanaged code does have deterministic destruction behaviour - put a break point in the destructor of an unmanaged class and the break point is reached at the time that is expected. Alice

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[fusion] [doc] documentation comment
by Edward Diener 07 Oct '08

07 Oct '08

These lines in the Organization | Layers section of the fusion documentation baffle me: 'Each module has its own header file placed in the same directory with the actual module-directory. For example, there exists "boost/fusion/support.hpp" in the same directory as "boost/fusion/support".' I can see a "boost/fusion/support.hpp" file as well as a "boost/fusion/support" subdirectory. If I look at "boost/fusion/support.hpp" it includes a number of header files in the "boost/fusion/support" subdirectory. But what the two lines quoted in the documentation above are saying eludes me. If it is saying what I discovered, it is not explaining things correctly.

2 4

Re: [Boost-users] boost::mpl::map and inserting the same pair twice
by peter_foelsche＠agilent.com 06 Oct '08

06 Oct '08

I added the ::type to every insert. It still does not compile -- not using g++ nor using visual C++. Error message is not helpful. Also is there some operation to insert all elements of one map into another one? This would be extremely helpful. #include <boost/mpl/map.hpp> #include <boost/mpl/insert.hpp> #include <boost/mpl/size.hpp> #include <boost/type_traits/is_same.hpp> #include <boost/mpl/assert.hpp> typedef boost::mpl::map< boost::mpl::pair< boost::mpl::int_<0>, boost::mpl::int_<1> >, boost::mpl::pair< boost::mpl::int_<1>, boost::mpl::int_<0> > > CMap2; typedef boost::mpl::insert< CMap2, boost::mpl::pair< boost::mpl::int_<2>, boost::mpl::int_<3> >::type > CMap3; typedef boost::mpl::insert< CMap3, boost::mpl::pair< boost::mpl::int_<2>, boost::mpl::int_<3> >::type > CMap31; int main(int, char**) { CMap2 s; CMap3 s1; CMap31 s2; //BOOST_MPL_ASSERT((boost::is_same<CMap31, CMap3>)); return 0; } "The first point (using an init() function in preference to a constructor) is bogus. Using constructors and exception handling is a more general and systematic way of dealing with resource acquisition and initialization errors. This style is a relic of pre-exception C++." -- Stroustrup

2 1

Problem linking to Boost Filesystem Library
by DDBeatty＠dstsystems.com 06 Oct '08

06 Oct '08

I am getting an unresolved external error when auto-linking to the Boost Filesystem Library Compiler: Visual Studio 2005 Boost Library Version: 1.36.0 The error: packagereport.obj : error LNK2001: unresolved external symbol "class boost::system::error_code boost::filesystem::detail::throws" (?throws@detail@filesystem@boost@@3Verror_code@system@3@A) The Boost Libraries were compiled using Visual Studio 2005 as well. I compiled with BOOST_LIB_DIAGNOSTIC and got the following two lines in the output: Linking to lib file: libboost_system-vc80-mt-gd-1_36.lib Linking to lib file: libboost_filesystem-vc80-mt-gd-1_36.lib I added /verbose to the linker and got the following: Processed /DEFAULTLIB:libboost_system-vc80-mt-gd-1_36.lib Processed /DEFAULTLIB:libboost_filesystem-vc80-mt-gd-1_36.lib Searching ..\3rdParty\Boost\lib\libboost_system-vc80-mt-gd-1_36.lib: Found "class boost::system::error_category const & __cdecl boost::system::get_system_category(void)" (?get_system_category@system@boost@@YAABVerror_category@12@XZ) Referenced in packagereport.obj Loaded libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Found "class boost::system::error_category const & __cdecl boost::system::get_generic_category(void)" (?get_generic_category@system@boost@@YAABVerror_category@12@XZ) Referenced in packagereport.obj Loaded libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Found __IMPORT_DESCRIPTOR_boost_system-vc80-mt-gd-1_36 Referenced in libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Referenced in libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Loaded libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Found boost_system-vc80-mt-gd-1_36_NULL_THUNK_DATA Referenced in libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Loaded libboost_system-vc80-mt-gd-1_36.lib(boost_system-vc80-mt-gd-1_36.dll) Searching ..\3rdParty\Boost\lib\libboost_filesystem-vc80-mt-gd-1_36.lib: Found "class boost::filesystem::file_status __cdecl boost::filesystem::detail::status_api(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class boost::system::error_code &)" (?status_api@detail@filesystem@boost@@YA?AVfile_status@23@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AAVerror_code@system@3@@Z) Referenced in packagereport.obj Loaded libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Found "class boost::system::error_code __cdecl boost::filesystem::detail::remove_api(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?remove_api@detail@filesystem@boost@@YA?AVerror_code@system@3@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) Referenced in packagereport.obj Loaded libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Found __IMPORT_DESCRIPTOR_boost_filesystem-vc80-mt-gd-1_36 Referenced in libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Referenced in libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Loaded libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Found boost_filesystem-vc80-mt-gd-1_36_NULL_THUNK_DATA Referenced in libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Loaded libboost_filesystem-vc80-mt-gd-1_36.lib(boost_filesystem-vc80-mt-gd-1_36.dll) Using Dumpbin.exe I get the following: >From the dll: 68 43 00011E04 ?throws@detail@filesystem@boost@@3Verror_code@system@3@A >From the lib: ?throws@detail@filesystem@boost@@3Verror_code@system@3@A (class boost::system::error_code boost::filesystem::detail::throws) It looks like the decorated names in the lib and dll match the name that is being searched for by the linker and it looks like the linker found the lib file. Any ideas why this would not be linking? Also, I have tried disabling the auto-linking (using BOOST_ALL_NO_LIB) and linking manually, but I get the same error. Thanks, Doug Beatty ----------------------------------------- This e-mail and any attachments are intended only for the individual or company to which it is addressed and may contain information which is privileged, confidential and prohibited from disclosure or unauthorized use under applicable law. If you are not the intended recipient of this e-mail, you are hereby notified that any use, dissemination, or copying of this e-mail or the information contained in this e-mail is strictly prohibited by the sender. If you have received this transmission in error, please return the material received to the sender and delete all copies from your system.

1 0

*NIX: Boost ASIO and file descriptor limits
by Etienne Philip Pretorius 06 Oct '08

06 Oct '08

Hello list, I have a question regarding the system limit on a *NIX system for the maximum open file descriptors that a process may have open. If you were using the boost asio library to design a server application how would you go about and extend the server to handle more than the 1024 file descriptor limit. The common approach on *nix systems is to fork(2) the process and have the child accept the client connections and have the parent process inform the child process when the listening socket has clients waiting to be accepted. My question is how would I achieve a similar design approach. Any comments or ideas are welcome. Kind Regards, Etienne Pretorius.

3 8

[MPL] Generate template instantiation ?
by Olivier Tournaire 06 Oct '08

06 Oct '08

Hi all, I have a class templated on 2 arguments, e.g. : template <typename PixelType , typename NbChannels> class myClass { // ... }; This class is in a lib, and I would like to instantiate it for all base type (signed char, unsigned char, int, unsigned int ...), and for a given number of channels. For example : template class myClass<unsigned char,1>; template class myClass<unsigned char,2>; // ... template class myClass<unsigned char,10>; template class myClass<signed char,1>; template class myClass<signed char,2>; // ... template class myClass<signed char,10>; And so on. Is there a way to do this without writing all possiblities. Maybe with the MPL ? Best regards, Olivier

2 1

Exception handling inside a dll
by Matthew LaCrosse 06 Oct '08

06 Oct '08

Hello, I'm writing a JNI dll that can be called from a Java GUI. The java program passes a regex and a string to search. The dll function does a boost::regex_search and returns an IntArray with the results. The problem that I'm having is that bad expressions result in a crash. For instance, if the user inputs \b as the regex and 'bad' as the string, the program crashes.

4 10

Mutex is always blocking
by Jean-Sebastien Stoezel 06 Oct '08

06 Oct '08

Hello, Is there a specific way of initializing the boost::mutex objects? Here is the sequence I have been using: Instantiation of the mutex boost::mutex m_CmdMutex; Then try to lock it m_CmdMutex.lock(); It looks like every time I try to lock a mutex I lock my thread. Anything else needs to be done? Thanks, Jean

3 3

filesystem::recursive_directory_iterator quits on unreadable directory
by Charles Karney 06 Oct '08

06 Oct '08

Version: boost 1.36 Library: filesystem Platform: Linux Compiler: g++ 4.3.0 The increment operator in filesystem::recursive_directory_iterator throws an exception when trying to enter an unreadable directory (permissions, no-such-device, etc.). Often (usually?), a user wants to be able to skip the unreadable directory and continue the iteration over the rest of the directory tree. Catching this exception doesn't help because the iterator hasn't been incremented and I couldn't figure a way to skip over the unreadble directory. The following modification of filesystem/convenience.hpp catches the exception at a low enough level to allow the directory to be skipped over. Is there a better way of handling this? Thanks. --- /usr/local/include/boost-1_36/boost/filesystem/convenience.hpp 2008-09-30 17:34:10.000000000 -0400 +++ boost/filesystem/convenience.hpp 2008-10-02 16:40:43.000000000 -0400 @@ -239,10 +239,15 @@ else if ( is_directory( m_imp->m_stack.top()->status() ) ) { system::error_code ec; - m_imp->m_stack.push( - m_imp->m_no_throw - ? basic_directory_iterator<Path>( *m_imp->m_stack.top(), ec ) - : basic_directory_iterator<Path>( *m_imp->m_stack.top() ) ); + const Path& top = *m_imp->m_stack.top(); + m_imp->m_stack.push(end_itr); + try { + m_imp->m_stack.top() = + m_imp->m_no_throw + ? basic_directory_iterator<Path>( top, ec ) + : basic_directory_iterator<Path>( top ); + } + catch ( ... ) { } if ( m_imp->m_stack.top() != end_itr ) { ++m_imp->m_level; -- Charles Karney <ckarney(a)sarnoff.com> Sarnoff Corporation, Princeton, NJ 08543-5300 URL: http://charles.karney.info Tel: +1 609 734 2312 Fax: +1 609 734 2662

3 3

[MPL] for_each help needed
by Manuel Jung 06 Oct '08

06 Oct '08

Hey, I have problems using mpl::for_each. Well, it works for simple functors, but i need a functor with some context. I'm trying to build a functor through boost::bind. mpl::_1 should be a type from the consensus sequence if evaluated, shouldn't it? You can see a small (hopefully not too small) example below. Kind Regards Manuel class filter{ //[..] // "In" and "Out" are fusion::maps template< typename T > inline const boost::promise_stream<T>& get_promise(){ return fusion::at_key< T >(Out); }; template< typename T > inline void connect(const boost::promise_stream<T> &promise){ fusion::at_key< T >(In).reset(new boost::future_stream< T >(promise)); }; template< typename producer_type > void connect(producer_type Producer){ //[..] // "consensus" is a mpl sequence. mpl::for_each< consensus >(boost::bind(&producer_type::connect, Producer, get_promise< mpl::_1 >())); };

3 2

Cross-compile Boost, python include path problem
by raoul 06 Oct '08

06 Oct '08

Hi everyone, I'm trying to cross compile boost 1.36, and having an issue regarding boost.python compilation. In fact the cross compile is getting right. I'm using this script to cross compile boost: echo "using gcc : i686 : $CC ;" > tools/build/v2/user-config.jam cd tools/jam/src ./build.sh cp bin.*/bjam $BASE_DIR/toolchain/$TOOLCHAIN_VER/$TOOLCHAIN/bin/ cd ../../../ bjam -d2 --toolset=gcc-i686 --prefix=${ROOTFS_DIR}/usr --with-python install Boost.python compiles right, but when I want to link to the created library (libboost_python...) it failes with some strange errors: libboost_python-gcc-mt-1_36.so: undefined reference to `PyUnicodeUCS4_FromEncodedObject' libboost_python-gcc-mt-1_36.so: undefined reference to `PyUnicodeUCS4_AsWideChar' I googled a bit, and it seems that this problem is because libboost_python was not compiled with the same python version than the one I've corsscompiled with. And this is the problem. When reading the boost compilation log: "i686-unknown-linux-gnu-gcc" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DNDEBUG -I"." -I"/usr/include/python2.5" -c -o "bin.v2/libs/python/build/gcc-calaos/release/threading-multi/dict.o" "libs/python/src/dict.cpp" bjam is using the host include path for python (the -I/usr/include/python2.5 option), and this is wrong. How can I force bjam to use ${ROOTFS_DIR}/usr/include/python2.5 for python include path, instead of the one of my host system? I don't know how boost is checking and detecting python cflags. Using python-config? Is there a way to tell bjam to use ${ROOTFS_DIR}/usr/bin/python-config? Thanks, -- ------------------------ Raoul Hecky

2 2

boost::iostream exception
by Lloyd 06 Oct '08

06 Oct '08

Hi, I am trying to decompress a file using boost::iostreams (1.35.0) library built with zlib-1.2.3 . I am able to decompress the file with other utilities but this program throws me an exception saying "gzip error". I am able to uncompress other gzipped files. What could be the reason for the exception? Any help is very much appreciated. Thanks Lloyd The decompress function is also added here ========================================== bool ParseHttp::Decompress(const char* inBuff, int inLen,char** outBuff, int* OutLen,int type) { enum { CHUNK=4096 }; if(inBuff==NULL) return false; filtering_streambuf<input> in; switch(type) { case GZIP: in.push(gzip_decompressor()); break; case ZLIB: in.push(zlib_decompressor()); break; } in.push(boost::make_iterator_range((const char*)inBuff,(const char*)inBuff+inLen)); vector<vUnzip*> unZipV; int totLen=0; while(1) { char* data=new char[CHUNK]; int xyz=0; try { xyz=boost::iostreams::read(in,data,CHUNK); } catch(exception& e) { if(debug) cout<<e.what()<<endl; } unZipV.push_back(new vUnzip(data,xyz)); totLen+=xyz; if(xyz!=CHUNK) break; } *outBuff=new char[totLen]; int g=0; for(int k=0;k<unZipV.size();++k) { memcpy((*outBuff)+g,unZipV[k]->ptr,unZipV[k]->len); g+=unZipV[k]->len; delete unZipV[k]; } *OutLen=totLen; return true; } ______________________________________ Scanned and protected by Email scanner

1 0

Asio question
by Amit Sonawane 06 Oct '08

06 Oct '08

Hi, I am using Asio in Boost version 1.36.0 and I have a question regarding recursive call to a completion handler. I have implemented a class similar to the one from the examples of asio acceptor. I would like to know if there is a way to recursively call handle_accept () within handle_accept() and break on condition when the socket is closed. (Please see my comment in the code ). Does Asio allow such implementation or is there another way to handle this condition. #include "server.hpp" #include <boost/bind.hpp> namespace http { namespace server2 { server::server(const std::string& address, const std::string& port, const std::string& doc_root, std::size_t io_service_pool_size) : io_service_pool_(io_service_pool_size), acceptor_(io_service_pool_.get_io_service()), new_connection_(new connection( io_service_pool_.get_io_service(), request_handler_)), request_handler_(doc_root) { // Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR). boost::asio::ip::tcp::resolver resolver(acceptor_.io_service()); boost::asio::ip::tcp::resolver::query query(address, port); boost::asio::ip::tcp::endpoint endpoint = *resolver.resolve(query); acceptor_.open(endpoint.protocol()); acceptor_.set_option(boost::asio::ip::tcp::acceptor::reuse_address(true) ); acceptor_.bind(endpoint); acceptor_.listen(); acceptor_.async_accept(new_connection_->socket(), boost::bind(&server::handle_accept, this, boost::asio::placeholders::error)); } void server::run() { io_service_pool_.run(); } void server::stop() { io_service_pool_.stop(); } void server::handle_accept(const boost::system::error_code& e) { if (!e) { new_connection_->start(); acceptor_.async_accept(new_connection_->socket(), boost::bind(&server::handle_accept, this, boost::asio::placeholders::error)); //Need to call handle_accept again here e.g. boost::bind(&server::handle_accept, this, boost::asio::placeholders::error)); } } } // namespace server2 } // namespace http Thanks, Anuit Esta mensagem pode conter informação confidencial e/ou privilegiada. Se você não for o destinatário ou a pessoa autorizada a receber esta mensagem, não deverá utilizar, copiar, alterar, divulgar a informação nela contida ou tomar qualquer ação baseada nessas informações. Se você recebeu esta mensagem por engano, por favor avise imediatamente o remetente, respondendo o e-mail e em seguida apague-o. Agradecemos sua cooperação. This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, change, take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation.

3 2

[shared_ptr] Cannot include shared_ptr.hpp in a Visual Studio .Net 2003 managed C++ file
by Alice Johnson 06 Oct '08

06 Oct '08

When I include <boost/shared_ptr.hpp> in a file that has Compile as Managed set to Assembly support (/clr), I get: error C2373: 'InterlockedIncrement' : redefinition; different type modifiers C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WinBase.h(1298) : see declaration of 'InterlockedIncrement' I started with boost version 1.34.1, but have also tried 1.35.0 and 1.36.0 Is there any solution to this? Alice Johnson

4 3

[Asio]: Massive performance degradation with compiler optimization
by Roland Bock 06 Oct '08

06 Oct '08

Hi, I am experimenting with asio in order to replace our current tcp library and stumbled over something weird this morning: The ansynchronous tcp echo server from the examples is much slower (~factor 3) with compiler optimization turned on! http://www.boost.org/doc/libs/1_36_0/doc/html/boost_asio/example/echo/async… For my test I modified the blocking single threaded tcp echo client to send 1000 identical messages of about 100kB length to the server and display the echo (see attachment). with -O0: ========= time ./src/TcpClient localhost 3000 | wc 1000 3000 104459000 real 0m6.072s user 0m5.564s sys 0m0.508s with -O3: ========= time ./src/TcpClient localhost 3000 | wc 1000 3000 104459000 real 0m21.287s user 0m5.756s sys 0m0.164s The optimization has very little effect on the client, though. When performing several runs, the time needed for the experiments varies a lot with -O3, ranging from about 13 seconds to up to 40 seconds. With -O0, the values do not change much (6-7 seconds). Other optimization switches (-O1 or -O2) behave like -O3. I have not tried to turn on/off the single optimization flags like -ftree-dominator-opts yet. Some system information (please do not hesitate to ask for more): Ubuntu 8.04, 64bit g++ 4.2.3 With other parts of boost I checked, opimization works as expected, sometimes with outstanding results: My date parser using spirit gained almost a factor of ten in performance. Any ideas what might be happening with the server? Thanks and regards, Roland

1 0

fast_pool_allocator question
by Ta-Cheng Lin 06 Oct '08

06 Oct '08

Hi : I use fast_pool_allocator and it seems not release memory even I explicitly call boost::singleton_pool<boost::fast_pool_allocator_tag, sizeof(int)>::release_memory(); out put 1. MEM USAGE = 11 MB, 2. MEM USAGE = 35 2. MEM USAGE = 35 2. MEM USAGE = 35 3. MEM USAGE = 35 4. MEM USAGE = 35 <<<--- memory is not released!!! Any suggestions are welcomed. -Todd --- BEGIN ---- #include <boost/pool/pool_alloc.hpp> #include <list> using namespace std; using namespace boost; #include "memusage.cpp" <<-- function to call Unix 'top' //-------------------------------------------------- void func() { list<int, fast_pool_allocator<int> > v; // list<int> v; for (int i = 0; i < 1000000; ++i) { v.push_back(i); } printf("2. MEM USAGE = %d\n", getMemUsage()); } //-------------------------------------------------- int main(int argc, char **argv) { printf("1. MEM USAGE = %d\n", getMemUsage()); func(); func(); func(); /// Exiting the function does NOT free the system memory allocated by the pool allocator // You must call // boost::singleton_pool<boost::pool_allocator_tag, sizeof(int)>::release_memory() // in order to force that printf("3. MEM USAGE = %d\n", getMemUsage()); boost::singleton_pool<boost::fast_pool_allocator_tag, sizeof(int)>::release_memory(); printf("4. MEM USAGE = %d\n", getMemUsage()); return 1; } // from boost doc // If you are seriously concerned about performance, // use fast_pool_allocator when dealing with containers such as std::list, // and use pool_allocator when dealing with containers such as std::vector. -- END --

1 0

[date-time] Should this be an exception
by Larry 06 Oct '08

06 Oct '08

Using 1_35_0 on MSVS .NET 2003 string x("200810051"); try { date d(from_undelimited_string(x)); } catch (exception& e) { } I would have though this would thrown an exception (too many digits in the date) but it didn't. I may have missed it in the doc that the constructor only considers the first 8 digits (for the undelimited case - actually probably the from_undelimited_string function). Or did I miss something else? Larry

1 0

[thread] Synchronisation Across Multiple Condition Variables
by Alex Adranghi 05 Oct '08

05 Oct '08

Dear All, I'd like to ask the floor what is the best way to wait on multiple condition variables, with the first one causing the "aggregated wait" to return with some distinguishable value. --- I'm looking to achieve something akin to .NET's WaitHandle.WaitAny, or a limited Occam ALT. After a quick peak at the source, I believe this would be a non-trivial change to the library. A way around it involves sharing data and wrapping a condition, defining notify() to take a boost:condition_variable. This would notify the condition_variable argument* so that sole observers will be notified, then setting an identifier to a member field, followed by notifying the wrapped general condition itself. The new aggregated wait() would first wait for a notification from the wrapped condition, before retrieving the identifier written to the object to return. Problem is, I don't think this is particularly elegant. Another solution is using threads to wait for each boost::condition_variable, but I don't see this as practical due to obvious overhead. *However this means for notify(), observers of the sole condition have waking preference over observers of the aggregated condition, and there is no way to know if any thread has been woken (in order to determine whether to notify the wrapped boost::condition_variable). --- Thanks for reading this, and answers on a postcard appreciated ;). -- Best regards, Alex Adranghi web: www.alexadranghi.com linkedin: www.linkedin.com/in/alexadranghi mail: mail(a)alexadranghi.com pgp: 0x6770b73f

2 1

[Review] Phoenix review results
by Hartmut Kaiser 05 Oct '08

05 Oct '08

Hi all, the Phoenix review is over and I counted 15 votes, 11 of which vote for acceptance and 4 vote for conditional acceptance. Let me explain. All reviewers stated that the outstanding quality of the library and its documentation fully merit immediate acceptance. There is no direct concern with regard to the library itself. Phoenix V2 is already in the Boost distribution as a Spirit sub-library and has matured for a long time, proving its stability and usability. On the other hand, Phoenix provides functionality already covered by Boost.Bind and Boost.Lambda. It is the general intention to use Phoenix as the development ground for a new unified Boost library in this area. The review discussions revealed quite some details and certain problems which have to be resolved for this merger to happen. Joel has a full list of these details and promised to address all of them before adding Phoenix to the Boost SVN. The library authors made clear from the beginning that the review of the current Version 2 of the library is just a stepping stone towards this goal. At the same time Eric Niebler presented a first version of a Proto based Phoenix rewrite (referenced as Phoenix V3). It is the general consensus to use Phoenix V3 as the basis for further development. At the same time Phoenix V3 exposes the same interface as Phoenix V2 and passes all related tests. This review formally was about Phoenix V2, but largely turned out to be a discussion of the future of Bind/Lambda and how Boost should go forward in this direction. Again, the general consensus here is that a) we need a unified approach to bind, lambda, et.al., and b) Boost users need interface stability and minimal disruption. So here is the review result: The quality of Phoenix warrants immediate acceptance into Boost. OTOH, adding Phoenix to Boost as is introduces yet another library dealing with functional idioms. This possibly increases the confusion around the fact which of the libraries to use, etc. The goal should be to have a clear integration of, and migration path from the existing Boost.Bind and Boost.Lambda libraries before final addition of Phoenix to Boost. We will have a mini review before Phoenix gets merged to SVN to make sure whether the feedback from the v2 review was accommodated. Additionally this review will have to discuss: - the breaking interface changes from v2 - the migration path from boost::bind and lambda to Phoenix - how the interoperability with std::bind is solved (result_of semantics) - C++0x features such as rvalue references and variadic templates - the new extensibility mechanism - unified placeholders and interoperability issues with other Proto-based DSELs (such as Spirit.Qi, Spirit.Karma, and Xpressive) - compile times In general, the review was valuable for what it accomplished. It moved us closer towards a unified Boost library in the domain of functional programming idioms. Thanks to Joel and Dan for the high quality submission and to all participating the discussion for their valuable insights! Regards Hartmut Review Manager

3 2

Re: [Boost-users] [statechart] handling unexpected events
by Robert Mecklenburg 05 Oct '08

05 Oct '08

On 2008-09-18 20:54:11 GMT, Robert wrote: > The only thing I can see is that the unconsumed_event() function is > called with the unexpected event object. What I'd like to do in this > function is: > > 1. Abort my transaction and force the state machine back to the Ready > state. I'm not sure how to do this. I've implemented a hack with an internal event, ResetEvent, that I post. This sort of works, but it executes the exit() member function of the aborted state. I'd rather not, I'm trying to abort the behavior of the current state, not complete it. If there was a way from unconsumed_event() to get the current state object and set a flag in it, I could avoid completing the state behavior with a guard. I can use state_downcast<const T *>() to get a const pointer to my state object, but because it is const I can't set a flag. I cannot seem to get a non-const pointer. > 2. Reprocess the unexpected event if it is a hello or get, discard it > otherwise. I'm not sure how to do this, either. I've discovered that post_event() will enqueue any event for processing after the current react() is finished. Thanks for any insight you can provide, -- Robert

2 1

[statechart] handling unexpected events
by Robert Mecklenburg 05 Oct '08

05 Oct '08

I'm attempting to use StateChart to model a simple socket protocol and I'm having difficulty understanding how to handle protocol errors. I've read the sections on Error handling and two phase exit without gaining much insight. Those sections seem to be concerned with user-written code that cannot complete and thus must throw an exception. The type of error I'm currently concerned with is an unexpected event. For example, in this simple protocol we must first receive a hello before being ready to handle requests. A request returns data and must be followed by a commit, which completes the transaction and returns us to the ready state. (start state) (hello event) -> (ready state) (ready state) (get event) -> (data delivered) (data delivered) (commit event) -> (ready state) My problem is this: how do I detect and recover when I'm in the (data delivered) state and the next event is not a (commit event)? The only thing I can see is that the unconsumed_event() function is called with the unexpected event object. What I'd like to do in this function is: 1. Abort my transaction and force the state machine back to the Ready state. I'm not sure how to do this. 2. Reprocess the unexpected event if it is a hello or get, discard it otherwise. I'm not sure how to do this, either. At a more abstract level, it seems that unconsumed_event() is the only way to deal with an unexpected event and to try to reset the state machine. Is this true? Thanks, -- Robert

2 1

[program_options] Decorating output
by Boris 05 Oct '08

05 Oct '08

When I send options_description to cout I would like to put an empty line between the caption and the options - something like: Allowed options: --help produce help message --compression arg set compression level As : is automatically appended to the caption it's not possible to add \n. Is this what I'm trying to do supported? Another question: Can the argument arg behind the --compression option above be changed to <arg>? I read at http://article.gmane.org/gmane.comp.lib.boost.user/38506 that it's not possible to replace arg with level but maybe putting <> around arg works somehow? Boris

2 1

[BGL] Mapping a source Graph to a target Graph
by Ioannis Nousias 05 Oct '08

05 Oct '08

Hello BGL developers, I'm looking for an algorithm that can map a source graph to a target graph. The special requirement is that the graphs have a set of vertices which are differentiated by type(colour if you like). Thus 'red' source vertices should only map to 'red' target vertices, etc. The mapping should be 1-to-1 (a 'blue' target vertex can accept one 'blue' source vertex). I assume the target graph has enough vertices of each type(colour) to map all vertices of the source graph. The target graph represents a topology, while the source graph is the data-graph to map onto that topology. I've briefly looked at the 'layout' specific algorithms provided by BGL. I thought the 'gursoy_atun_layout'could be used, but then I realised it was not meeting the requirements. The main thing that's missing is the way to differentiate vertices by type. Also I don't understand why the 'topology' is not a BGL graph as well. To put it in other words, the layout algorithms in BGL operate on a homogeneous environment. The source vertices can freely occupy any 'point' or 'position' on the target medium. I'm looking for an algorithm that operates on a heterogeneous environment, where the target 'slots' can only accept source vertices of a given type. Is there any current BGL algorithm that fits that description, or can be easily modified to cover this case? If not, can somebody point me to an efficient mapping algorithm that I could base an implementation on. thanks in advance, Ioannis -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

1 1

using boost in x64 app
by LeRetha Childress 04 Oct '08

04 Oct '08

I am using Windows Vista and Visual Studio 2005 to create my 64 bit application I used bjam to build my boost libraries with the following command bjam --toolset=msvc-8.0_64 stagedir=. --build-type=complete But when I link it to my library I get many warnings like the following 1>..\..\3rdparty\boost\boost/config/abi_prefix.hpp(19) : warning C4103: 'd:\brokaw.x64\3rdparty\boost\boost\config\abi_prefix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 1>..\..\3rdparty\boost\boost/archive/detail/abi_prefix.hpp(11) : warning C4103: 'd:\brokaw.x64\3rdparty\boost\boost\archive\detail\abi_prefix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 1>..\..\3rdparty\boost\boost/archive/basic_binary_oprimitive.hpp(52) : warning C4103: 'd:\brokaw.x64\3rdparty\boost\boost\archive\basic_binary_oprimitive.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) The library builds but with 892 of these boost warnings Then when I build the driver for the app I get 219 linker errors like the following 2>overlaylibd.lib(bsVolumeLineStrip.obj) : error LNK2001: unresolved external symbol "public: void __cdecl boost::archive::detail::basic_iarchive::load_object(void *,class boost::archive::detail::basic_iserializer const &)" (?load_object@basic_iarchive@detail@archive@boost@ @QEAAXPEAXAEBVbasic_iserializer@234@@Z) 2>overlaylibd.lib(bsVolumePolygons.obj) : error LNK2019: unresolved external symbol "public: void __cdecl boost::archive::detail::basic_iarchive::load_object(void *,class boost::archive::detail::basic_iserializer const &)" (?load_object@basic_iarchive@detail@archive@boost@ @QEAAXPEAXAEBVbasic_iserializer@234@@Z) referenced in function "private: void __cdecl bs::Volume::Serialize::load<class boost::archive::binary_iarchive>(class boost::archive::binary_iarchive &,unsigned int)" ( ??$load@Vbinary_iarchive@archive@boost@@@Serialize@Volume@bs@@AEAAXAEAVbinary_iarchive@archive@boost@@I@Z ) Most of them are for boost::archive , boost::serilization and boost::signal Can anyone tell me what I'm doing wrong or how to fix these issues Thank you LeRetha Childress

2 1

[Proto] Using custom function tag in the simplified calalble context
by Joel Falcou 04 Oct '08

04 Oct '08

I've defined some custom tag for user specific function like : struct conj_tag {}; I have made the following expression builder using make_expr : template<class X> typename proto::result_of::make_expr< conj_tag, X const &>::type conj( X const& x ) { return proto::make_expr<conj_tag>(boost::cref(x)); } And I match this function using the following grammar rule : struct my_grammar : or_< // some terminal , bp::function< bp::terminal<conj_tag>, my_grammar> > {}; Now, how should I overload operator() of a callable_context to match this special tag ? Thanks in advance -- ___________________________________________ Joel Falcou - Assistant Professor PARALL Team - LRI - Universite Paris Sud XI Tel : (+33)1 69 15 66 35

4 4

[thread] win32 mutex optimization
by Alexander Gutenev 04 Oct '08

04 Oct '08

I'd like a small change to: 1. Increase mutex::lock() performance. 2. Remove auto-link to date_time. a patch attached (For some reason yesterday posting failed, trying to post again) begin 666 mutex_optimize_lock.patch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` end

1 0

How to build only these binaries?
by Sachin Garg 04 Oct '08

04 Oct '08

I want to only build both debug and release statically linked binaries. What are the build options to build just these on windows, linux and mac? To clarify, binaries which would link directly inside my executable (the libs that won't need any dll or so). On windows I am using /MT in my projects, so the libs should also statically link to msvc runtime. When using --build-type=complete it generates 5GB of binaries, which for 32-bit and 64-bit on windows, mac and linux together ends up taking a lot more space than I can afford.

4 6

[Phoenix] Review ended September 30th
by Hartmut Kaiser 03 Oct '08

03 Oct '08

Hi all, just a (last) reminder for all of you still wanting to submit a review. The official review period is over, but since I'm going prepare the review summary this weekend only anyway - you still have a day or two. Regards Hartmut Review Manager

3 2

boost::serialization forcing linker to create a lib?
by gfsdjkgf＠Safe-mail.net 03 Oct '08

03 Oct '08

Hello folks I am using boost 1.37 off the CVS with the visual studio 2008 compiler. As soon as I instantiate an archive (of boost::serialization), the linker implicitly creates a lib and a exp file for my exe. Is that wanted behavior? Why? //text_iarchive archive(file); <- When this line is not commented, the linker creates the two files. This is the linker output: 'Creating library project_manager.lib and object project_manager.exp' Thank you

4 3

Assertion in boost::mutex
by amit khandelwal 03 Oct '08

03 Oct '08

I am getting an assertion in boost::mutex while using static mutex variables. Below is the stack trace for that. void boost::mutex::lock(): Assertion `!pthread_mutex_lock(&m)' failed. #0 0xb7f9f410 in __kernel_vsyscall () #1 0xb75f1085 in raise () from /lib/tls/i686/cmov/libc.so.6 #2 0xb75f2a01 in abort () from /lib/tls/i686/cmov/libc.so.6 #3 0xb75ea10e in __assert_fail () from /lib/tls/i686/cmov/libc.so.6 #4 0x080581eb in ~mutex (this=0x80f3ab8) at boost/thread/pthread/mutex.hpp:45 #5 0x0805f202 in __tcf_7 () at TimerQueue.cpp:22 #6 0xb75f4084 in exit () from /lib/tls/i686/cmov/libc.so.6 #7 0xb75dc458 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6 #8 0x080546c1 in _start () Any pointers/suggestions? -- ------------------------------------------------------------------- Ph : (732) 647 5679 Email: khandelwal.amit(a)gmail.com Web: http://khandelwal.amit.googlepages.com/home -------------------------------------------------------------------

2 2

[Boost-user] bjam and env var
by Jérémie Fouché 03 Oct '08

03 Oct '08

Hi everybody I'm creating python modules with boost, and I'm using bjam to compile them (because, as written in the doc, it is the easiest way to compile python module created with boost.python). Actually, my jam script is specific to my directory structure. If I want to change my directory structure, or shared my project with someone who haven't the same directory structure (which is always the case), my jam files need to be changed. My jam files are at the end of this post. I tried to use environment variables without success. If I create a BOOST_ROOT env var, I can't use it in my JamRoot file, because $(BOOST_DIR) is always empty. I also tried to create a var in my user-config.jam, but the var isn't visible in my JamRoot file. So, here are my questions : 1 - Is there a good way to do this ? 2 - I didn't find exactly what is boost-build.jam for, have you an explanation ? Thanks boost-build.jam : boost-build /_Perso/projets/lib/boost_1_36_0/tools/build/v2 ; JamRoot : wx = /_Perso/projets/lib/wxWidgets2.8 ; # Specify the path to the Boost project. If you move this project, # adjust this path to refer to the Boost root directory. use-project boost : ../../../../lib/boost_1_36_0 ; # Set up the project-wide requirements that everything uses the # boost_python library from the project whose global ID is /boost/python. project : requirements <library>/boost/python//boost_python ; # Declare the extension module. python-extension gui : gui.cpp : <include>$(wx)/include <include>$(wx)/lib/gcc_dll/mswu <define>__GNUWIN32__ <define>__WXMSW__ <define>WXUSINGDLL <define>wxUSE_UNICODE <library-file>$(wx)/lib/gcc_dll/libwxmsw28u.a ; -- Jérémie

4 7

Serialization: delayed loading of vertexes of graph/tree
by Moritz Moeller 03 Oct '08

03 Oct '08

Sorry for the n00b question, but I'm totally new to the use of sth. like boost::serialization. I always wrote all this stuff 'by hand' before. :) I have a tree (AABB tree, to be precise -- no cycles and no joins) that I have serialized (I wrote this one 'by hand', i.e. I don't use the boost graph library). This works great if I need to save and/or load the entire tree at once. But actually, when I load it, I want to be able to explicitly trigger loading of the two sub-vertexes of each vertex in the tree. I.e. my serialization code for a vertex of the tree currently looks like this: template< typename _archive > void serialze( typename _archive& ar, const unsigned version ) { ... // data ar & _data; // sub-vertexes aka children ar & _child[ 0 ]; ar & _child[ 1 ]; } Now what I imagine is that I split this into save() and load(). My save() would look exactly like the above serialize(), but my load() would also need to be split into two parts, one that is invoked automatically, when I load the object via operator >> and the other one, which I call explicitly later. template< typename _archive > void load( typename _archive& ar, const unsigned version ) { ... // data ar & _data; } template< typename _archive > void loadChildren( typename _archive& ar, const unsigned version ) // sub-vertexes aka children ar & _child[ 0 ]; ar & _child[ 1 ]; } I have no idea if this is the right approach and if so, if I can just call loadChildren() with the resp. archive? I imagine not, since I can not guarantee that the vertexes in the tree will be visited in the same order as they were during invocation of save(). Quite to the contrary, it is highly unlikely that they will ever be visited in that order. What I can guarantee though is that each cell's parent has been visited by the time I need to load it. I.e. the tree is always restored from the root up, but I can't guarantee which path along the edges the program will walk when doing so. So am I back to writing this all 'by hand' in this case or is there some mechanisms in boost::serialization that I could exploit here? Cheers, Moritz

2 1

Re: [Boost-users] threads in a DLL with callbacks
by Nicholas Cain 03 Oct '08

03 Oct '08

Hi, can I make another plea for any answers to my question (below). It may be that the answer is so obviously 'of course it does' that I didn't get a response. I did think about posting to the threads.devel list, but it didn't look like the right place... Nik ----- Original Message ----- From: "Nicholas Cain" <ncain(a)frontier.co.uk> To: <boost-users(a)lists.boost.org> Sent: Thursday, September 25, 2008 10:55 AM Subject: threads in a DLL with callbacks > Hi, > > I've created a component that's distributed as a DLL. The user loads the > DLL, calls various methods on it and gets some data back asyncronously via > callbacks. > > Within the component there are several threads (using boost threads of > course) any of which might call the callbacks. In all our sample code > demonstrating how to create callbacks and call the methods we use boost > mutexes to protect the callback functions and this works just fine. > > > Some of our clients however don't want to dip their toes into boost, and > want to use windows methods to protect the callbacks. For instance so far > they've tried various methods such as CComAutoCriticalSection and > EnterCriticalSection. > > They still have a crash which they're attributing to my DLL. I keep > pushing them to at least try the boost mutex as in our sample code, but no > luck so far. > > > My question is; should the windows critical section protect the callbacks > just as well as the boost mutexes, or does it require a boost mutex > protection? (or do you require a code example to know the answer to this?) > > > Nik > > >

3 3

Re: [Boost-users] [Graph] Issue with is_straight_line_drawing?
by Gevorg Voskanyan 03 Oct '08

03 Oct '08

David Gleich wrote: > Hi, > > I'm concerned about the output I'm getting from the > is_straight_line_drawing function in the Boost Graph library. My > understanding was that it should report true when the graph and > positions are a planar embedding (no edge crossings). > > Based on this understanding, I thought the code listed at the end of > the message should say that the drawing for a clique on 4 vertices, > with positions on a square, is not planar (see the picture below). > This arrangement has one edge crossing. The function outputs that the > graph is a plane drawing. > > Did I misunderstand what the is_straight_line_drawing function is > supposed to do? > > Thanks, > David Gleich > > #include > #include > #include > #include > #include > #include > > #include > > using namespace boost; > > //a class to hold the coordinates of the straight line embedding > struct coord_t { > std::size_t x; > std::size_t y; > }; > > int main(int argc, char** argv) { > typedef adjacency_list > < vecS, vecS, undirectedS, property> graph; > > graph g(4); // make the clique on 4 vertices > add_edge(0,1,g); add_edge(0,2,g); add_edge(0,3,g); > add_edge(1,2,g); add_edge(1,3,g); add_edge(2,3,g); > > //Set up a property map to hold the mapping from vertices to coord_t's > typedef std::vector< coord_t > straight_line_drawing_storage_t; > typedef boost::iterator_property_map > < straight_line_drawing_storage_t::iterator, > property_map::type > > > straight_line_drawing_t; > > > straight_line_drawing_storage_t straight_line_drawing_storage > (num_vertices(g)); > straight_line_drawing_t straight_line_drawing > (straight_line_drawing_storage.begin(), > get(vertex_index,g) > ); > /* > should be > 0 > / | \ > 3--|--1 > \ | / > 2 > which is not a plane drawing. > */ > straight_line_drawing[0].x = 1; straight_line_drawing[0].y = 2; > straight_line_drawing[1].x = 2; straight_line_drawing[1].y = 1; > straight_line_drawing[2].x = 1; straight_line_drawing[2].y = 0; > straight_line_drawing[3].x = 0; straight_line_drawing[3].y = 1; > > if (is_straight_line_drawing(g, straight_line_drawing)) > std::cout << "Is a plane drawing." << std::endl; > else > std::cout << "Is not a plane drawing." << std::endl; > > return 0; > } > > > /* Compiling and example > $ g++ -v > Using built-in specs. > Target: x86_64-linux-gnu > Configured with: ../src/configure -v > --enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr > --enable-shared --with-system-zlib --libexecdir=/usr/lib > --without-included-gettext --enable-threads=posix --enable-nls > --with-gxx-include-dir=/usr/include/c++/4.2 --program-suffix=-4.2 > --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc > --enable-mpfr --enable-checking=release --build=x86_64-linux-gnu > --host=x86_64-linux-gnu --target=x86_64-linux-gnu > Thread model: posix > gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu7) > > $g++ is_straight_line_drawing.cpp -I/home/dgleich/dev/lib/boost_1_36_0/ > $./a.out > Is a plane drawing. > > Should be > > Is not a plane drawing. > */ Hi David, is_straight_line_drawing() is actually correct here because your test graph can be drawn in a way that has no edge crossing. Consider for example this one: 3 --- 1 \ \ / / \ 0 / \ | / \|/ 2 Sorry for my perhaps clumsy ASCII drawing, but you get the idea. Hope this helps, Gevorg

1 0

[Proto] Limiting function arity in grammar
by Joel Falcou 02 Oct '08

02 Oct '08

How can I write a grammar that accept a given set of terminal and functions with up to N arguments (for example accepting function with 1 to 5 arguments but not 6 or more) ? I believe i can count the elements of vararg using mpl::size ons ome proto::arg_ or proto::value maybe but how to prevent those who violates this condition be removed from the accepted functions et ? thanks in advance -- ___________________________________________ Joel Falcou - Assistant Professor PARALL Team - LRI - Universite Paris Sud XI Tel : (+33)1 69 15 66 35

2 3

compiler warnings with visual studio 2008
by gfsdjkgf＠Safe-mail.net 02 Oct '08

02 Oct '08

Hello folks I am using boost 1.37 off the CVS with the visual studio 2008 compiler. As soon as I compile my code files with the /W4 option (maximum compiler warning level), I get tons of warnings inside the boost header. Disabling them all using #pragma's can be a pain in the ass. Is there any other, better solution to get rid of the warnings? Thank you

1 0

[bind] How to dereference _1 in a boost::bind expression
by Peter Barker 02 Oct '08

02 Oct '08

Hello, Here's an example of my problem: #include <algorithm> #include <vector> #include <boost/bind.hpp> class TheClass { }; void accept(TheClass& tc) { } int main() { std::vector<TheClass*> cont; // Compile error - how to dereference _1 ??? std::for_each(cont.begin(),cont.end(),boost::bind(&accept,_1)); } How can I dereference _1 so I can use the accept function? Regards, Pete

6 11

serialization x64 abi_prefix/suffix problem
by Terdale, Shantibhushan 02 Oct '08

02 Oct '08

I am getting these errors while building one of my projects where boost serialization headers are included 1>..\..\..\ThirdParty\Boost\boost/config/abi_prefix.hpp(19) : error C2220: warning treated as error - no 'object' file generated 1>..\..\..\ThirdParty\Boost\boost/config/abi_prefix.hpp(19) : warning C4103: 'x:\thirdparty\boost\boost\config\abi_prefix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 1>..\..\..\ThirdParty\Boost\boost/serialization/extended_type_info.hpp(2 7) : warning C4103: 'x:\thirdparty\boost\boost\serialization\extended_type_info.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 1>..\..\..\ThirdParty\Boost\boost/config/abi_suffix.hpp(20) : warning C4103: 'x:\thirdparty\boost\boost\config\abi_suffix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 1>..\..\..\ThirdParty\Boost\boost/serialization/extended_type_info.hpp(9 5) : warning C4103: 'x:\thirdparty\boost\boost\serialization\extended_type_info.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 1>..\..\..\ThirdParty\Boost\boost/config/abi_prefix.hpp(19) : warning C4103: 'x:\thirdparty\boost\boost\config\abi_prefix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 1>..\..\..\ThirdParty\Boost\boost/serialization/extended_type_info_typei d.hpp(35) : warning C4103: 'x:\thirdparty\boost\boost\serialization\extended_type_info_typeid.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 1>..\..\..\ThirdParty\Boost\boost/config/abi_suffix.hpp(20) : warning C4103: 'x:\thirdparty\boost\boost\config\abi_suffix.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) 1>..\..\..\ThirdParty\Boost\boost/serialization/extended_type_info_typei d.hpp(143) : warning C4103: 'x:\thirdparty\boost\boost\serialization\extended_type_info_typeid.hpp' : alignment changed after including header, may be due to missing #pragma pack(pop) I saw discussion on this before and am wondering what is the solution? It only emits these warnings for x64 build and why not for x86 ? It only emits these warnings for one perticular project in my soluton whereas these headers are included in many projects. why? Thanks Shanti

1 0

[mp_math_v02] Typo in integral_ops.hpp?
by Mikko Vainio 02 Oct '08

02 Oct '08

Hi, A couple of problems encountered with mp_math_v02 from the Vault: - Should line 315 of mp_math/mp_int/detail/integral_ops.hpp read "lhs.multiply_by_digit(static_cast<typename MpInt::digit_type>(rhs));" instead of "lhs.mul_digit(static_cast<typename MpInt::digit_type>(rhs));" ? "mul_digit" seems not to be defined. - prime_tab_impl::values gets defined multiple times, because the assignment is in the header. You could use a singleton class and e.g. Eratosthenes' sieve to fill the array with primes. That should stay header-only. Rgds, Mikko

1 0

Simple regex does not match
by Jean-Pierre Bergamin 02 Oct '08

02 Oct '08

Hello everyone Why does the following regex not match? boost::regex expected("foo"); BOOST_CHECK(boost::regex_match("foo bar", expected)); Is there a flag I should set so that this regex matches? In perl, there would be a match in this case. if ("foo bar" =~ /foo/) { ... } Thanks for your hints. James

2 1

[mp_math] Serialization of mp_int<> ?
by Mikko Vainio 02 Oct '08

02 Oct '08

Hi, Does anyone know if serialization is implemented for the mp_int class from the mp_math library in the vault? Regards, Mikko

1 0

type_info wrapper
by Peter Barker 01 Oct '08

01 Oct '08

Hello, I'm looking for a type_info wrapper similar to the one described in Alexandrescu's Modern C++ design and wondered if Boost contained one that wasn't in the implementation detail area of another library? My Googling shows there's been a demand for this in the past and wonder if it had been done? Regards, Pete

3 3

Re: [Boost-users] Program_options assertion failure Johnathan Bunn (2007-08-29 02:40:20)
by Huml Pavel 01 Oct '08

01 Oct '08

[boost_1_34_0 \ program_options] Johnathan Bunn wrote: > im having an issue with a project using visual studio pro 2005 > > if it makes a difference the librarys im using are > Qt, pdflib, boost, and some crystal com stuff thorugh activex > > my problem is that when I build in release my command line args are parsed > fine and my application behaves as expected. > > when I build in debug mode, I get an asertion failure as follows > > Assertion failed: n == name.size()-2, file > libs\program_options\src\options_description.cpp, line 122 I had a same problem with MSVC 2005 when one of my other(no boost) libs use UNICODE. There is probably some bug in auto_link.hpp (when it generate library name and link it => some link mismach in boost STL raised). My tricky solution is: Turn off auto_link by statement before include program_option.hpp: #define BOOST_PROGRAM_OPTIONS_NO_LIB ON #include <boost/program_options.hpp> And link library which you need manually (probably libboost_program_options-vc80-mt-gd-1_34.lib) by option Link\Input\additional dependency. There is a paradox: same library as is normaly included by auto_link can be used to include by MSVC option and then all see OK with no assertion. Pavel

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[MPL][FUSION] generate fusion::map from mpl::vector
by Manuel Jung 01 Oct '08

01 Oct '08

Hi, I get as template parameter a mpl::vector with various types. Now want to generate one object of each type. To do so, i like to generate a fusion::map, which has as key the type itself (from the mpl::vector) and as object e.g. boost::promise_stream< type >. Well this is what i've got so far: template< typename OutSignatures > class filter_impl{ typedef typename mpl::transform< OutSignatures, boost::promise_stream<mpl::_1> >::type OutStreams; typedef typename mpl::transform< OutSignatures, OutStreams, fusion::make_pair< mpl::_1, mpl::_2 > >::type OutPairs; typedef typename fusion::result_of::as_map< fusion::vector< OutPairs > >::type Out_type; } This compiles fine. But i'm not able to generate some fusion::map from the Out_type. I get compiling errors than. Well I'm new to the whole MPL and fusion stuff. Am i doing the right things? Or maybe my goal could be achived easier? Thanks for any hints, Kind Regards Manuel

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Boost in the pharmaceutical industry?
by Boris 01 Oct '08

01 Oct '08

Is there anyone who has used Boost C++ libraries in the pharmaceutical industry? I especially wonder how Boost C++ libraries and GAMP (see http://www.ispe.org/cs/gamp_publications_section/gamp_publications_overview) fit together. Anyone with some experience or links to read more about Boost and GAMP? Thanks in advance, Boris

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Change format output for strings
by Mads Bondo Dydensborg 01 Oct '08

01 Oct '08

Hi there. I have some unittests that compare strings, that look something like this, when they are run, and fails: boost_extract_xml_from_es_task_package.cc(106): error in "itemorder": check "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>todo" == output_24575997 failed [<?xml version="1.0" encoding="ISO-8859-1"?>todo != <?xml version="1.0" encoding="ISO-8859-1"?><ill5:ILL-APDU xmlns:ill5="http://www.loc.gov/z3950/agency/defns/ill5" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/z3950/agency/defns/ill5 http://www.bs.dk/standards/illv5.xsd"><ill5:ILL-Request-1 protocol-version-num="2" place-on-hold="1" ><transaction-id transaction-qualifier="87792" transaction-group-qualifier="87792"><initial-requester-id><person-or-institution-symbol><institution-symbol>DK-726000</institution-symbol></person-or-institution-symbol></initial-requester-id></transaction-id><service-date-time><date-time-of-this-service date="2008-09-27"></date-time-of-this-service></service-date-time><requester-id><person-or-institution-symbol><institution-symbol>DK-726000</institution-symbol></person-or-institution-symbol></requester-id><responder-id><person-or-institution-symbol><institution-symbol>720100</institution-symbol></person-or-institution-symbol></responder-id><iLL-service-type>1</iLL-service-type><item-id><held-medium-type></held-medium-type><system-no>id=42780960 og lok=870970</system-no></item-id></ill5:ILL-Request-1></ill5:ILL-APDU>] Now, this is almost impossible to read. Is there a way to massage the framework into giving output similar to how nunit does it, something like: boost_extract_xml_from_es_task_package.cc(106): error in "itemorder": check "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>todo" == output_24575997 failed output differs at position 42 expected ...ISO-8859-1"?><!-- Alle niveauer ... got ...ISO-8859-1"?>todo<eof> ^ (You need a fixed font, I reckon). In the example I know it is quite simple, but I wanted to spare you for some functions we have, where we have to run wdiff on them to see the difference. (And, not to worry, we are not generating XML by hand, but this was the example I had ready). It would be cool to have this in the testing framework - writing code to do this on two different strings are no problem, but I have absolutely no clue on how to the test framework to do it. I got as long as BOOST_TEST_DECL void check_impl( predicate_result const& pr, wrap_stringstream& check_descr, const_string file_name, std::size_t line_num, tool_level tl, check_type ct, std::size_t num_args, ... ); before I gave up - perhaps someone else knows how to get further? Thanks in advance Mads -- Med venlig hilsen/Regards Systemudvikler/Systemsdeveloper cand.scient.dat, Ph.d., Mads Bondo Dydensborg Dansk BiblioteksCenter A/S, Tempovej 7-11, 2750 Ballerup, Tlf. +45 44 86 77 34

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[program_options] linker error LNK2005 (symbol already defined in object)
by Olaf Peter 01 Oct '08

01 Oct '08

Hi, I've got the linker error LNK2005 (http://msdn.microsoft.com/en-us/library/72zdcz6f(VS.80).aspx) using MSVC80 (Studio 2005): libboost_program_options-vc80-mt-1_35.lib(value_semantic.obj) : error LNK2005: "public: __thiscall boost::program_options::invalid_option_value::invalid_option_value(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (??0invalid_option_value@program_options@boost@@QAE@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z) ist bereits in boost_program_options-vc80-mt-1_35.lib(boost_program_options-vc80-mt-1_35.dll) definiert. libboost_program_options-vc80-mt-1_35.lib(value_semantic.obj) : error LNK2005: "public: virtual char const * __thiscall boost::program_options::validation_error::what(void)const " (?what@validation_error@program_options@boost@@UBEPBDXZ) ist bereits in boost_program_options-vc80-mt-1_35.lib(boost_program_options-vc80-mt-1_35.dll) definiert. libboost_program_options-vc80-mt-1_35.lib(value_semantic.obj) : error LNK2005: "void __cdecl boost::program_options::validate(class boost::any &,class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > const &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > *,int)" (?validate@program_options@boost@@YAXAAVany@2@ABV?$vector@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@2@@std@@PAV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@5@H@Z) ist bereits in boost_program_options-vc80-mt-1_35.lib(boost_program_options-vc80-mt-1_35.dll) definiert. libboost_program_options-vc80-mt-1_35.lib(value_semantic.obj) : error LNK2005: "private: virtual void __thiscall boost::program_options::value_semantic_codecvt_helper<char>::parse(class boost::any &,class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > const &,bool)const " (?parse@?$value_semantic_codecvt_helper@D@program_options@boost@@EBEXAAVany@3@ABV?$vector@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@2@@std@@_N@Z) ist bereits in boost_program_options-vc80-mt-1_35.lib(boost_program_options-vc80-mt-1_35.dll) definiert. libboost_program_options-vc80-mt-1_35.lib(options_description.obj) : error LNK2005: "public: class boost::program_options::options_description_easy_init __thiscall boost::program_options::options_description::add_options(void)" (?add_options@options_description@program_options@boost@@QAE?AVoptions_description_easy_init@23@XZ) ist bereits in boost_program_options-vc80-mt-1_35.lib(boost_program_options-vc80-mt-1_35.dll) definiert. libboost_program_options-vc80-mt-1_35.lib(options_description.obj) : error LNK2005: "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl boost::program_options::operator<<(class std::basic_ostream<char,struct std::char_traits<char> > &,class boost::program_options::options_description const &)" (??6program_options@boost@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@std@@AAV23@ABVoptions_description@01@@Z) ist bereits in boost_program_options-vc80-mt-1_35.lib(boost_program_options-vc80-mt-1_35.dll) definiert. libboost_program_options-vc80-mt-1_35.lib(options_description.obj) : error LNK2005: "public: __thiscall boost::program_options::options_description::options_description(unsigned int)" (??0options_description@program_options@boost@@QAE@I@Z) ist bereits in boost_program_options-vc80-mt-1_35.lib(boost_program_options-vc80-mt-1_35.dll) definiert. libboost_program_options-vc80-mt-1_35.lib(options_description.obj) : error LNK2005: "public: __thiscall boost::program_options::options_description::options_description(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,unsigned int)" (??0options_description@program_options@boost@@QAE@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@I@Z) ist bereits in boost_program_options-vc80-mt-1_35.lib(boost_program_options-vc80-mt-1_35.dll) definiert. libboost_program_options-vc80-mt-1_35.lib(options_description.obj) : error LNK2005: "public: class boost::program_options::options_description_easy_init & __thiscall boost::program_options::options_description_easy_init::operator()(char const *,char const *)" (??Roptions_description_easy_init@program_options@boost@@QAEAAV012@PBD0@Z) ist bereits in boost_program_options-vc80-mt-1_35.lib(boost_program_options-vc80-mt-1_35.dll) definiert. libboost_program_options-vc80-mt-1_35.lib(options_description.obj) : error LNK2005: "public: class boost::program_options::options_description_easy_init & __thiscall boost::program_options::options_description_easy_init::operator()(char const *,class boost::program_options::value_semantic const *,char const *)" (??Roptions_description_easy_init@program_options@boost@@QAEAAV012@PBDPBVvalue_semantic@12@0@Z) ist bereits in boost_program_options-vc80-mt-1_35.lib(boost_program_options-vc80-mt-1_35.dll) definiert. libboost_program_options-vc80-mt-1_35.lib(options_description.obj) : error LNK2005: "public: class boost::program_options::options_description & __thiscall boost::program_options::options_description::add(class boost::program_options::options_description const &)" (?add@options_description@program_options@boost@@QAEAAV123@ABV123@@Z) ist bereits in boost_program_options-vc80-mt-1_35.lib(boost_program_options-vc80-mt-1_35.dll) definiert. libboost_program_options-vc80-mt-1_35.lib(convert.obj) : error LNK2005: "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl boost::program_options::to_internal(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?to_internal@program_options@boost@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@ABV34@@Z) ist bereits in boost_program_options-vc80-mt-1_35.lib(boost_program_options-vc80-mt-1_35.dll) definiert. using the linker options: /O2 /Ob2 /I "C:\Cpp\boost_1_35_0" /I ... /D "WIN32" /D "_WINDOWS" /D "NDEBUG" /D "BOOST_ENABLE_ASSERT_HANDLER=1" /D "QT_DLL" /D "QT_GUI_LIB" /D "QT_CORE_LIB" /D "QT_NO_DEBUG" /D "CMAKE_INTDIR=\"Release\"" /D "_MBCS" /FD /EHsc /MD /Fo"eda.dir\Release\\" /Fd"D:/work/build/Release/eda.pdb" /W3 /nologo /c /TP /errorReport:prompt Any ideas what happened here? Thanks, Olaf

5 7

Simple telnet client demonstration with boost asio asynchronous I/O
by Jeff Gray 01 Oct '08

01 Oct '08

I've been teaching myself how to use the asynchronous I/O capabilities in Boost asio. I took the chat client example code that came with Boost and modified it to act as a more general telnet client. Hopefully, this may be of use to others trying to get to grips with the basics of this way of working. More experienced developers can feel free to suggest better ways of doing things here. This is just a demonstration - it does not do all the niceties of a full application, but hopefully covers the basics. I wrote this for a Linux system, but the only system specific thing is the code that enables single keypress input for cin.get(). I'm sure you can easily find alternatives for your system to achieve the same result. Enjoy, Jeff

3 5

Re: [Boost-users] [Statechart] Passing Arguments in the Events Concept
by Babi Seal 30 Sep '08

30 Sep '08

Thanks for your prompt response. Yes it works really well. ----- Original Message ---- From: Andreas Huber <ahd6974-spamboostorgtrap(a)yahoo.com> To: boost-users(a)lists.boost.org Sent: Tuesday, September 30, 2008 1:08:24 PM Subject: Re: [Boost-users] [Statechart] Passing Arguments in the Events Concept Hi > I have been researching the Boost archives, Tutorials, > examples and I do find references to the fact that it is > possible to provide arguments along with Events that a > custom_reaction (in self-transition) can selectively > "react" on based on the value of the argument but > I am unable to articulate it using the Boost Statechart > library. I just realized that there is not a single example on how to pass arguments with events. It's very easy to do, though: struct EvWhatever : sc::event< EvWhatever > { int Arg1; double Arg2; // More arguments here }; You might want to add a constructor that accepts corresponding arguments and sets the data members Arg1 & Arg2 accordingly. You can access Arg1 & Arg2 in the react member function, in a transition action or the function called by an in_state_reaction. Hope this helps. if not, please let me know. Regards, -- Andreas Huber

1 0

asio async_accept
by Etienne Philip Pretorius 30 Sep '08

30 Sep '08

Just a quick question about the async_accept() in acceptor. Must the accept_handler be declared as a static member function within my class? The online examples do not seem to do this at all, and if I try it without the static keyword on my private member function then the compiler complains about it not matching the signature. Etienne Pretorius

5 10

[Proto] Evaluating non-trivial expression
by Joel Falcou 30 Sep '08

30 Sep '08

Let's say I have grammar etc.. for writing algebra code like : a = b+c, u = x + y, z = 3*e; and have each sub expression containing a = call to be evaluated on a different processor. Where can I put the evaluation call using the context ? In the destructor of my associated expression ?

2 4

[Phoenix] review reminder
by Hartmut Kaiser 30 Sep '08

30 Sep '08

All, this is just a gentle reminder for all of you willing and planning to write a review for Joel de Guzman's and Dan Marsden's library Phoenix V2. The review ends tomorrow, September 30th. If you are for some reason not able to write the review before tomorrow night, please get in contact with me directly, so we can work something out. Regards Hartmut Review Manager

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