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Boost 1.28 Regex and VC6 link problem
by Edward Diener 04 Aug '02

04 Aug '02

Using Boost 1.28 and regex I get linker errors regarding raw_storage. I believe someone has brought this up before but I didn't save the previous answer. error LNK2001: unresolved external symbol "public: class boost::detail::allocator_adapter<char,class boost::detail::simple_alloc> __fastcall boost::re_detail::raw_storage<class boost::detail::allocator_adapter<char,class boost::detail::simple_alloc> >::allocator(void)const " error LNK2001: unresolved external symbol "public: class boost::detail::allocator_adapter<char,class boost::detail::simple_alloc> __fastcall boost::re_detail::raw_storage<class boost::detail::allocator_adapter<char,class boost::detail::simple_alloc> >::allocator(void)const " error LNK2001: unresolved external symbol "public: __thiscall boost::re_detail::raw_storage<class boost::detail::allocator_adapter<char,class boost::detail::simple_alloc> >::raw_storage<class boost::detail::allocator_adapter<char,class boost::detail::simple_alloc> >(class re_detail::detail::allocator_adapter<char,class boost::detail::simple_alloc> const &)" error LNK2001: unresolved external symbol "public: __thiscall boost::re_detail::raw_storage<class boost::detail::allocator_adapter<char,class boost::detail::simple_alloc> >::raw_storage<class boost::detail::allocator_adapter<char,class boost::detail::simple_alloc> >(class re_detail::detail::allocator_adapter<char,class boost::detail::simple_alloc> const &)" error LNK2001: unresolved external symbol "public: void * __fastcall boost::re_detail::raw_storage<class boost::detail::allocator_adapter<char,class boost::detail::simple_alloc> >::insert(unsigned int,unsigned int)" error LNK2001: unresolved external symbol "public: void __fastcall boost::re_detail::raw_storage<class boost::detail::allocator_adapter<char,class boost::detail::simple_alloc> >::resize(unsigned int)" It seems to be related to these lines in instances.hpp template class re_detail::raw_storage< BOOST_DEFAULT_ALLOCATOR BOOST_REGEX_CHAR_T) >; template class BOOST_REGEX_DECL re_detail::raw_storage<BOOST_DEFAULT_ALLOCATOR(BOOST_REGEX_CHAR_T) >; Are these lines in error ? Should one or both of them be removed ? My guess is that the line with BOOST_REGEX_DECL needs to be removed.

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Problems with mpl::find and std library
by Tanton Gibbs 03 Aug '02

03 Aug '02

I had a problem with using mpl::find and the std::find at the same time. Basically, my compiler, Compaq C++ V6.5-026, notes an ambiguity in find.hpp between the find_if that it uses and the find_if in the STL. I changed the line that reads struct find : find_if< Sequence, same_as<T> > {}; to be struct find : mpl::find_if< Sequence, same_as<T> > {}; and it works fine. I'm not sure if this is a compiler bug or if we need to find other occurences like this one and fix them. Any help is appreciated. Tanton

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boost.python - from_python for obj.__class__
by Nikolay Mladenov 02 Aug '02

02 Aug '02

Hi, I have exported some classes to python with boost.python, and now I am wondering: Does any body know how can I convert obj.__class__ (of an exported object from C++) to a class specific value( for example typeid(corespondong_cpp_class) )? Thanks in advance, Nikolay

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bjam issue related to boost::python
by Srivatsan Raghavan 02 Aug '02

02 Aug '02

hi all , i created a c++ extension module using python which worked fine.. then i wanted to embed a call to PyRun_SimpleFile in another app, and the script i was calling is attempting to use my extension module but i was getting telling me that the interpreter wasn't initialized after much searching, research, and work with msvc's Dependency Walker i narrowed it down to the fact that boost_python_debug.dll is trying to link to the release version of python22.dll , whereas it should be linking to python22_d.dll (which unfortunately does not come with the python installer , that has to be compiled manually ) at any rate, how can the boost::python Jamfile be modified to try this check when it comes boost::python ? --vat ==.sig== Evil requires nothing more to win than that good men do nothing

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[BGL] Vertex removal without iterator invalidation?
by Erik Arner 01 Aug '02

01 Aug '02

Yet another question from the BGL newbie... I understand that performing remove_vertex() on graphs with vertexList=vecS will result in invalidated itarors and descriptors for the graph. However, some toy examples i made suggest that if I remove a vertex in such a graph, the vertex descriptors and vertex iterators for vertices with *lower* ID than the removed vertex remain valid after removal, while those for higher ID vertices are invalidated. Is this a true feature of a graph with Vertexlist=vecS, or is my observation a mere coincidence? Is it safe to write code that exploits this "feature"? If it indeed is a feature, I can construct a sorted list of vertices to remove, and remove the vertices in descending order in an easy fashion. If it is not a feature, any suggestions on how to perform this task i.e. removing a list of vertices while keeping the VertexList type vecS? Thanks, Erik

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collection container
by Bohdan 01 Aug '02

01 Aug '02

Has boost any plans on creating container, that holds data by pointer, not by value? Rationale: It is impossible to use normally vector<...> for types that do not have copy constructor. Interface of vector< shared_ptr<...> > doesn't seems to be very convenient( for example with std::algorithms ). And most of all it is not good idea to show vector< shared_ptr<...> > interface to user of my lib, that wants to have container::iterator with normal behavior. AFAIK majority of existing libraries have/need such container ? As to me it is strange that neither stl nor boost have such class. I'm missing 'something' and there are important reasons for not doing this ?

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Creating groups of regular expressions
by cyndi_r2002 01 Aug '02

01 Aug '02

Hi, I have started using Regex++ and like it a lot but is there a way to use grouping constructs using Regex++ / any alternative that would provide the same functionality? Thanks, Cyndi

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Newbie link problem
by Lev Assinovsky 01 Aug '02

01 Aug '02

Hi all! I would like to do a very simple thing: link my main tst.cpp with the third party library $(MYDIR)/libfoo.a. The final command line should be: g++ -o tst tst.cpp -L$(MYDIR) -lfoo Currently I have in my Jamfile: exe tst : tst.cpp : <include>$(ADC_ROOT) <include>$(BOOST_ROOT) <include>"$(HOME)/inc" ; What must be added to provide linking with libfoo.a? (adding of variable LINKLIBS=$(MYDIR)/libfoo.a DOESN'T WORK) Thanks in advance! ---- Lev Assinovsky Aelita Software Corporation O&S Core Division, Programmer ICQ# 165072909 [Non-text portions of this message have been removed]

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boost working with CGAL ??
by Matthias Kronenberger 31 Jul '02

31 Jul '02

I want to use CGAL from http://www.cgal.org together with the boost library. I'm using MSVC 6.5 There seem to be some problems related to namespace issues. I'm getting the following kind of errors: d:\matthias\programmieren\cgal\include\cgal\number_utils.h(236): error C2955: 'is_integral': Fuer die Verwendung einer Vorlagenklasse ist eine Vorlagen-Argumentliste erforderlich d:\matthias\programmieren\boost\boost\type_traits\arithmetic_traits.hpp(38): Siehe Deklaration von 'is_integral'

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Cannot put .o File with Graph Code into .a File
by Adalbert Perbandt 30 Jul '02

30 Jul '02

Hi there, while trying to setup the BGL for use in my environment I'm facing a strange behavior when I try to put a C++ object file which contains instanciations of BGL templates into an object library. My environment: - Sun SPARC machine with Solaris 2.7 (SunOS 5.7) - gcc 2.95.2 The problem shows up when I try to put an .o file into a library file. I can reproduce the error with the file adjacency_list.cpp from the BGL's examples directory: $ pwd /home/perbandt/boost_1_28_0/libs/graph/example $ g++ --version 2.95.2 $ g++ -g -I../../../../boost_1_28_0 -c adjacency_list.cpp $ ls -l adjacency_list.o -rw-r--r-- 1 perbandt relman 3367052 Jul 19 18:40 adjacency_list.o $ which ar /usr/ccs/bin/ar $ ar rv libtest.a adjacency_list.o a - adjacency_list.o Bus error When I try a .a file with already one or more .o files in it I get a segmentation fault. With another file that contains instantiations of BGL templates the problem does appear only when it was compiled with the -g option given. Is this a known problem? Seems to me as if ar would have trouble handling the very long symbol names in the .o file. Or is something wrong with my environment? Thanks, Adalbert Perbandt.

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