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serialization problem
by nico35＠noos.fr 01 Dec '06

01 Dec '06

Hello, I am using boost1.33.1 and spirit1.6 and borland c++ builder. I have a compilation problem with the following source code. The error message is [C++ Error] void_cast.hpp(154): E2451 Undefined symbol 'get_instance' [C++ Error] void_cast.hpp(155): E2451 Undefined symbol 'get_instance' [C++ Error] void_cast.hpp(154): E2285 Could not find a match for 'void_caster::void_caster(undefined,undefined)' Can anybody help me fixing this compilation problem ? Than you in advance. Marc. //--------------------------------------------------------------------------- #include <vcl.h> #pragma hdrstop #include <boost/serialization/utility.hpp> // includes for xml serialization #include <boost/archive/xml_oarchive.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/basic_xml_oarchive.hpp> #include <boost/archive/basic_xml_iarchive.hpp> #include <boost/archive/impl/xml_iarchive_impl.ipp> #include <boost/archive/impl/xml_oarchive_impl.ipp> #include <boost/archive/impl/basic_xml_oarchive.ipp> #include <boost/archive/impl/basic_xml_iarchive.ipp> #include <boost/archive/basic_text_oprimitive.hpp> #include <boost/archive/basic_text_iprimitive.hpp> #include <boost/archive/impl/basic_text_oprimitive.ipp> #include <boost/archive/impl/basic_text_iprimitive.ipp> #include <boost/archive/impl/basic_xml_grammar.hpp> #include <libs/serialization/src/basic_xml_grammar.ipp> #include <boost/serialization/nvp.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/export.hpp> #include <boost/serialization/type_info_implementation.hpp> #include <boost/serialization/extended_type_info_no_rtti.hpp> #include <boost/serialization/extended_type_info_typeid.hpp> #include<iostream> #include<fstream> #include <vector> #include <boost/serialization/vector.hpp> class BaseClass { protected: friend class boost::serialization::access; template<class Archive> void serialize(Archive& ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP(m_degrees); ar & BOOST_SERIALIZATION_NVP(m_minutes); ar & BOOST_SERIALIZATION_NVP(m_seconds); } int m_degrees; int m_minutes; float m_seconds; public: BaseClass() { m_degrees = 0; m_minutes = 0; m_seconds = 0.0; } BaseClass(int degrees, int minutes, float seconds) { m_degrees = degrees; m_minutes = minutes; m_seconds = seconds; } virtual void display() const { std::cout << "------------------------------------" << std::endl; std::cout << "m_degrees= " << m_degrees << std::endl; std::cout << "m_minutes= " << m_minutes << std::endl; std::cout << "m_seconds= " << m_seconds << std::endl; std::cout << "------------------------------------" << std::endl; } }; BOOST_CLASS_TYPE_INFO( BaseClass, extended_type_info_no_rtti<BaseClass> ) BOOST_CLASS_EXPORT(BaseClass) class DerivedClass1: public BaseClass { protected: friend class boost::serialization::access; template<class Archive> void serialize(Archive& ar, const unsigned int version) { ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(BaseClass); // ar & BOOST_SERIALIZATION_NVP(m_vector); } mutable std::vector<int> m_vector; public: DerivedClass1(): BaseClass() { } DerivedClass1(int degrees, int minutes, float seconds): BaseClass(degrees, minutes, seconds) { } void push_back(int arg) const { m_vector.push_back(arg); } virtual void display() const { std::cout << "***********************************************" << std::endl; BaseClass::display(); for (std::vector<int>::const_iterator iter=m_vector.begin(); iter!=m_vector.end(); iter++) { std::cout << " value= " << *iter << std::endl; } std::cout << "***********************************************" << std::endl; } }; BOOST_CLASS_TYPE_INFO( DerivedClass1, extended_type_info_no_rtti<DerivedClass1> ) BOOST_CLASS_EXPORT(DerivedClass1) BOOST_CLASS_TYPE_INFO( std::vector<double>, extended_type_info_no_rtti<std::vector<double> > ) BOOST_CLASS_EXPORT(std::vector<double>) int main() { const DerivedClass1 g(35, 59, 24.567f); g.push_back(10); g.push_back(20); g.push_back(30); g.display(); { std::ofstream ofs("filename"); boost::archive::xml_oarchive oa(ofs); oa << boost::serialization::make_nvp("g1", g); } DerivedClass1 newg; { std::ifstream ifs("filename"); boost::archive::xml_iarchive ia(ifs); ia >> boost::serialization::make_nvp("g1", newg); } newg.display(); return 0; } //--------------------------------------------------------------------------- /* ------------------------------------------------------------- Noos, votre bureau virtuel sur Internet : Mail... Web : webmail.noos.fr

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Re: [Boost-users] [bind, function, mem_fn] Connection to a base class
by Nat Goodspeed 01 Dec '06

01 Dec '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org [mailto:boost-users- > bounces(a)lists.boost.org] On Behalf Of Johannes Brunen > Sent: Friday, December 01, 2006 7:10 AM > To: boost-users(a)lists.boost.org > Subject: [Boost-users] [bind,function,mem_fn] Connection to a base class [Nat] This is top-of-the-head, no tests. > I have a base class X with two functions f and g > > class X { > virtual bool f() const; > virtual bool g(int) const; > }; > > and another class Y with functions f1, f2 and F > > class Y { > void f1(); > void f2(); > void F(???); [Nat] Seems like you'd want to make F accept boost::function<bool()>, and call it without arguments. > }; > > Y::f1() { > // call F so that F works on X::f > F(??? X::f); [Nat] F(boost::bind(&X::f, this)) > } > > Y::f2() { > // call F so that F works on Y::g but with g's int parameter known > and determined in Y::f2 > int v = 5; > F(??? X::g, v); [Nat] F(boost::bind(&X::g, this, v)) > }

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how to clear a Graph
by Ufuk Okuyucu 01 Dec '06

01 Dec '06

Hi, I've just been handed a code using boost's cuthill-mckee algorithm. I found a memory leak within the code block where a number of edges being added to a graph but never cleaned at the end. Now, graph has a "clear" method where it's supposed to delete vertices and edges but it does not effect the memory leak, when I check the used memory size its still there. I need a way to delete a graph object and free all its internal mallocations if any. ...and I haven't used boost before... Here is the code block: //create incidence graph G2 from adj_list //apply cuthill-mckee on G2 //write out resulting permutation to perm_result Graph G2(matrix_size); //Graph data structure used in Cuthill-Mckee //add all the edges in adj_list to G2 for(int row=0;row<matrix_size;row++) { for(ROW_ADJ::iterator col=adj_list[row].begin(); col != adj_list[row].end(); col++) { add_edge (row, *col, G2); //<<-----this is where it gets all that memory } } cout <<"edges added\n"; print_system_stats(); graph_traits<Graph>::vertex_iterator ui, ui_end; property_map<Graph,vertex_degree_t>::type deg = get(vertex_degree, G2); for (boost::tie(ui, ui_end) = vertices(G2); ui != ui_end; ++ui) deg[*ui] = degree(*ui, G2); property_map<Graph, vertex_index_t>::type index_map = get(vertex_index, G2); //printf("original bandwidth: %d\n",bandwidth(G2)); printf("# vertices: %d\n",num_vertices(G2)); printf("# edges: %d\n",num_edges(G2)); vector<Vertex> inv_perm(num_vertices(G2)); vector<size_type> perm(num_vertices(G2)); Vertex start_vertex = vertex(0,G2); cuthill_mckee_ordering(G2, start_vertex, inv_perm.rbegin(), get(vertex_color, G2), get(vertex_degree, G2)); for (size_type c = 0; c != inv_perm.size(); ++c) perm[index_map[inv_perm[c]]] = c; //cout << " bandwidth: " << bandwidth(G2, make_iterator_property_map(&perm[0], index_map, perm[0])) << endl; //perm has the new ordering, copy it to perm_result for (int i=0;i<matrix_size;i++) perm_result[i] = perm[i]; G2.clear(); //<<-------this statement does not release all the memory inv_perm.clear(); perm.clear(); -- * Ufuk Okuyucu** *

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configure boost on cygwin
by Shan 01 Dec '06

01 Dec '06

Hi, I'm trying to use boost in a cygwin enviroment. I've installed the boost-1_33_1 libraries using the cygwin setup program. I have a makefile to compile a simple program but I keep getting the error. $ make g++ -c -O3 cash_flow.cpp In file included from cash_flow.cpp:6: cash_flow.h:12: error: `boost' has not been declared cash_flow.h:12: error: ISO C++ forbids declaration of `shared_ptr' with no type cash_flow.h:12: error: expected `;' before '<' token make: *** [cash_flow.o] Error 1 I'm new to Unix like environments and am not able to setup the makefile properly. Below is what I have TARGET = main CPP = g++ CPPFLAGS = -O3 INCLUDES = -I/usr/include/boost-1_33_1 LDFLAGS = LIBS = -lboost_1_33_1 SOURCES = $(wildcard *.cpp) DEPENDS = $(SOURCES:%.cpp=%.d) OBJECTS = $(DEPENDS:%.d=%.o) TMPS = $(wildcard *.hpp~) $(wildcard *.cpp~) $(TARGET) : $(OBJECTS) $(CPP) -o $@ $(LDFLAGS) $(OBJECTS) $(LIBS) clean : rm -rf $(TARGET) $(DEPENDS) $(OBJECTS) $(TMPS) $(DEPENDS) : %.d : %.cpp set -e; $(CPP) -MM $(CPPFLAGS) $< \ | sed 's/$$*$\.o[ :]*/\1.o $@ : /g' > $@; \ [ -s $@ ] || rm -f $@ $(OBJECTS) : %.o : %.cpp $(CPP) -c $(CPPFLAGS) $< .PHONY : clean include $(DEPENDS) I also tried using the includes/library names I tried that as well INCLUDES = -I/usr/include/boost-1_33_1 LDFLAGS = -L/usr/lib LIBS = -lboost_1_33_1 and $(OBJECTS) : %.o : %.cpp $(CPP) -c $(CPPFLAGS) $(INCLUDES) $< Still get the same error .. Can someone tell me which libboost*.a should I point to as there are many .. for eg to use boost::shared_ptr? Thanks S.

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#include <boost/lambda/lambda.hpp>
by Andreas Wißmeier 01 Dec '06

01 Dec '06

> Dear all, > > if I include this file I get the following error-message: > > d:\cvsatSixt\sixt_offer_src\boost\boost\lambda\detail\arity_code.hpp(66): > error C2065: 'T' : undeclared identifier > > > I am using > Microsoft Visual C++ .NET version 1.0.3705 > > I am probably missing something very basic. > > Kind regards > Andreas > > > > > Andreas Wißmeier > GDS-Projekt > Sixt GmbH & Co. Autovermietung KG > Zugspitzstr. 1 > D-82049 Pullach > Tel.: +49 (0)89 74444 4229 > E-Mail.: andreas.wissmeier(a)sixt.de >

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[bind,function,mem_fn] Connection to a base class
by Johannes Brunen 01 Dec '06

01 Dec '06

Hi, I have the following problem and don't know how to design it with the boost tools at hand: I have a base class X with two functions f and g class X { virtual bool f() const; virtual bool g(int) const; }; and another class Y with functions f1, f2 and F class Y { void f1(); void f2(); void F(???); }; Now, f1 and f2 should call F, but f1 should determine that F calls X::f polymorphically and f2 should determine that F calls X::g polymorphically. Y::f1() { // call F so that F works on X::f F(??? X::f); } Y::f2() { // call F so that F works on Y::g but with g's int parameter known and determined in Y::f2 int v = 5; F(??? X::g, v); } Y::F(???) { smart_ptr<Y> sp1(new Y); smart_ptr<Y> sp2(new Y); // Either call Y::f on sp1 and sp2, or call Y::g(5) on sp1 and sp2 } Is this possible? I have looked into the documentation of boost::bind, boost::mem_fn and boost::function but didn't find a way to do that. Could someone give me some hint? With best regards Johannes Brunen

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boost::weak_ptr and boost::intrusive_ptr
by Steven T. Hatton 01 Dec '06

01 Dec '06

Why is there no counterpart for boost::weak_ptr that works with boost::intrusive_ptr? It's certainly possible to set up cycles with boost::intrusive_ptr. A simple example where intrusive_ptr is the right thing to use, and where the problem arrises is a tree structure. It is sometimes useful to maintain a bidirectional pointer relationship between children and parent nodes in a tree. Ideally, deleting the root of a tree will cascade down to delete all intermediate and leaf nodes which are not referenced by some other object. If both the downward and upward pointers are intrusive, removing the pointer to the root will result in orphaned data because the upward pointers prevent the root node from being deleted, while the downward pointers prevent the child nodes (and their upward pointers) from being removed. Intrusive pointers are, IMO, the correct mechanism to hold a tree together. They are efficient, effective, and easy to understand. They work better than shared pointers for recursive data structures. Unfortunately the lack of a corresponding weak_ptr to go with boost::intrusive_ptr means I either use a raw pointer to the parent, devise a strategy for decrementing the pointers myself, or create my own weak pointer. All of these options detract significantly from the value of boost::intrusive_ptr. I have the impression that in the past people have used intrusive pointers for the "wrong things", and this has caused them to get an overall bad reputation. IMO, they do have a place in good software design. Any thoughts on this topic? Steven

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Re: [Boost-users] [Serialization] Linker ErrorsUsingUnicode(Was:errorC2027:useofundefinedtype'boost::serialization::extended_type_info_null<T>'?)
by Lawrence Spector 01 Dec '06

01 Dec '06

Ok, so basically I need to change the default in bjam to turn off wchar_t as a native type, because our project has issues with some legacy code which wouldn't comply otherwise. Any idea how to disable this in bjam? I searched through and couldn't find anything in any of the jam files that indicated that this setting was either on or off. Thanks again for the help, Lawrence -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: Thursday, November 30, 2006 4:53 PM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] [Serialization] Linker ErrorsUsingUnicode(Was:errorC2027:useofundefinedtype'boost::serializatio n::extended_type_info_null<T>'?) I'm not sure that's true. What is necessary is that the switch setting must be the same as when the library is built. I presume its been built with bjam so its not readily apparent what the switch setting the library is actually built with. I'm quite sure that this is ok as vc 6.5 tests work and this version of compiler only has wchar_t defined as a 16 bit integer. Lawrence Spector wrote: > Ok, I was playing with the compiler settings and figured it out. > Apparently, in order to use this, you *must* have wchar_t treated as a > built-in type setting on in VC7.1. Ah ha. Maybe there's a good spot > to document that. I'll stick it in. > > Thanks for the assistance, > > Lawrence _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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BOOST_STATIC_CONST
by Michael Held 01 Dec '06

01 Dec '06

hi, I am using BOOST_STATIC_CONST for static class members of a base class. I have following situation: template <int T> class A { typedef typename MyType<T>::value_type value_type; BOOST_STATIC_CONST(typename value_type::some_type, MY_CONSTANT = 0); }; template <int T> class B : public A<T> { typedef A<T> Base; typedef typename Base::value_type value_type; BOOST_STATIC_CONST(typename value_type::some_type, MY_CONSTANT = Base::MY_CONSTANT); }; or template <int T> class B : public A<T> { typedef A<T> Base; typedef typename Base::value_type value_type; using Base::MY_CONSTANT; }; for both cases I got a linker error: /usr/bin/ld: Undefined symbols: B<0>::MY_CONSTANT what am I doing wrong? I am using darwin gcc4.0.1 and Boost from CVS thanks a lot! michael

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Re: [Boost-users] [Serialization] Linker Errors Using Unicode(Was:error C2027: useofundefinedtype'boost::serialization::extended_type_info_null<T>'?)
by Lawrence Spector 30 Nov '06

30 Nov '06

Ok, I was playing with the compiler settings and figured it out. Apparently, in order to use this, you *must* have wchar_t treated as a built-in type setting on in VC7.1. Ah ha. Maybe there's a good spot to document that. Thanks for the assistance, Lawrence

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Re: [Boost-users] Suggestion for boost`s smart pointers
by Sohail Somani 30 Nov '06

30 Nov '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Ilya Sokolov > sorry for such late response, i think you should also consider > Andrei and Petru's ScopeGuard from > http://www.ddj.com/dept/cpp/184403758 I think such an idea mixed with tr1/boost bind would be very useful. Though I'm just looking for a way to deallocate stuff allocated by a C library.

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Re: [Boost-users] [Serialization] Linker Errors Using Unicode(Was:error C2027: useofundefinedtype'boost::serialization::extended_type_info_null<T>'?)
by Lawrence Spector 30 Nov '06

30 Nov '06

Ok. Well, I tried testarray.cpp (which contains the test_array_text_warchive test) and it doesn't build in VC7.1, with the following linker errors, if I turn on the unicode option. I simply made a new project and turned on unicode, and added the file. I don't see why that should have any issues. I have yet to try with 1.34, but I can't see a logical reason why unicode doesn't work, but non-unicode does. I'll get back with the result of 1.34, but again, 1.33.1 does not link for me. The results are as follows: ------ Build started: Project: test_array_text_archive, Configuration: Debug Win32 ------ Linking... Creating library Debug/test_array_text_archive.lib and object Debug/test_array_text_archive.exp testarray.obj : error LNK2019: unresolved external symbol "void __cdecl boost::test_tools::tt_detail::check_impl(class boost::test_tools::predicate_result const &,class boost::basic_wrap_stringstream<char> &,class boost::unit_test::basic_cstring<char const >,unsigned int,enum boost::test_tools::tt_detail::tool_level,enum boost::test_tools::tt_detail::check_type,unsigned int,...)" (?check_impl@tt_detail@test_tools@boost@@YAXABVpredicate_result@23@AAV?$ basic_wrap_stringstream@D@3@V?$basic_cstring@$$CBD@unit_test@3@IW4tool_l evel@123@W4check_type@123@IZZ) referenced in function "int __cdecl test_array<class A>(class A)" (??$test_array@VA@@@@YAHVA@@@Z) testarray.obj : error LNK2019: unresolved external symbol "public: void __thiscall boost::archive::text_oarchive_impl<class boost::archive::text_oarchive>::save(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?save@?$text_oarchive_impl@Vtext_oarchive@archive@boost@@@archive@boost @@QAEXABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z ) referenced in function "public: static void __cdecl boost::archive::save_access::save_primitive<class boost::archive::text_oarchive,class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > >(class boost::archive::text_oarchive &,class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (??$save_primitive@Vtext_oarchive@archive@boost@@V?$basic_string@GU?$cha r_traits@G@std@@V?$allocator@G@2@@std@@@save_access@archive@boost@@SAXAA Vtext_oarchive@12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@ G@2@@std@@@Z) testarray.obj : error LNK2019: unresolved external symbol "public: void __thiscall boost::archive::text_iarchive_impl<class boost::archive::text_iarchive>::load(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > &)" (?load@?$text_iarchive_impl@Vtext_iarchive@archive@boost@@@archive@boost @@QAEXAAV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z ) referenced in function "public: static void __cdecl boost::archive::load_access::load_primitive<class boost::archive::text_iarchive,class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > >(class boost::archive::text_iarchive &,class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > &)" (??$load_primitive@Vtext_iarchive@archive@boost@@V?$basic_string@GU?$cha r_traits@G@std@@V?$allocator@G@2@@std@@@load_access@archive@boost@@SAXAA Vtext_iarchive@12@AAV?$basic_string@GU?$char_traits@G@std@@V?$allocator@ G@2@@std@@@Z) LIBCD.lib(crt0.obj) : error LNK2019: unresolved external symbol _main referenced in function _mainCRTStartup Debug/test_array_text_archive.exe : fatal error LNK1120: 4 unresolved externals Build log was saved at "file://c:\Work\Sandbox\Boost\Serialization\test_array_text_archive\Debu g\BuildLog.htm" test_array_text_archive - 5 error(s), 0 warning(s) ---------------------- Done ---------------------- Build: 0 succeeded, 1 failed, 0 skipped -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: Thursday, November 30, 2006 2:14 PM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] [Serialization] Linker Errors Using Unicode(Was:error C2027: useofundefinedtype'boost::serialization::extended_type_info_null<T>'?) Note that all tests (all 50 of them) work with all archive classes that the platform supports. It has been this way since the beginning. As far as I know there is nothing to fix. Robert Ramey Lawrence Spector wrote: > Okay, that's fair and fine. However, any explanation for the linker > errors that seem to occur only with unicode versions? > > Can anyone else try out the demo.cpp example > (http://www.boost.org/libs/serialization/example/demo.cpp) with a > unicode build, and just change the boost::archive::text_oarchive and > boost::archive::text_iarchive to use boost::archive::text_woarchive > and boost::archive::text_wiarchive, as well as using wide strings and > wide streams? I want to see if anyone else has this issue with > 1.33.1? > > Any chance this might be fixed in 1.34.0? > > Thanks, > > Lawrence > > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey > Sent: Thursday, November 30, 2006 11:47 AM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] [Serialization] error C2027: use of > undefinedtype'boost::serialization::extended_type_info_null<T>'? > > Note that the library is in two parts. libboost_serialization.. > contains > code used for all types of archives while libboost_wserialization > contains > code used only for wide character archives. So applications using > wide character archives should link against BOTH libraries. > > Robert Ramey > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users _______________________________________________ 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] [Serialization] Linker Errors Using Unicode (Was: error C2027: use of undefinedtype'boost::serialization::extended_type_info_null<T>'?)
by Lawrence Spector 30 Nov '06

30 Nov '06

Okay, that's fair and fine. However, any explanation for the linker errors that seem to occur only with unicode versions? Can anyone else try out the demo.cpp example (http://www.boost.org/libs/serialization/example/demo.cpp) with a unicode build, and just change the boost::archive::text_oarchive and boost::archive::text_iarchive to use boost::archive::text_woarchive and boost::archive::text_wiarchive, as well as using wide strings and wide streams? I want to see if anyone else has this issue with 1.33.1? Any chance this might be fixed in 1.34.0? Thanks, Lawrence -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: Thursday, November 30, 2006 11:47 AM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] [Serialization] error C2027: use of undefinedtype'boost::serialization::extended_type_info_null<T>'? Note that the library is in two parts. libboost_serialization.. contains code used for all types of archives while libboost_wserialization contains code used only for wide character archives. So applications using wide character archives should link against BOTH libraries. Robert Ramey _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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dijkstra_shortest_paths and Python
by Hugo Ferreira 30 Nov '06

30 Nov '06

HI there, I'm trying to use the BGL bindings for python found here: http://www.osl.iu.edu/~dgregor/bgl-python/ The problem is that I can't seem to understand how the dijkstra_shortest_paths() and the corresponding graph works. My code, so far, is like this: ---8<---8<--- import boost as bgl graph = bgl.Graph() a = graph.add_vertex() b = graph.add_vertex() e = graph.add_edge(a, b) weights = graph.edge_property_map('integer') weights[e] = 5 graph.edge_properties['weight'] = weights boost.dijkstra_shortest_paths(graph, a) ---8<---8<--- Which, of course, complains about the dijkstra_shortest_paths function signature. Can anyone please provide me an working example of setting up a graph and calling this function? I basically need the shortest path from vertex A to vertex B. Thanks in advance, Hugo Ferreira -- GPG Fingerprint: B0D7 1249 447D F5BB 22C5 5B9B 078C 2615 504B 7B85

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BGL: Retrieving a vertex_descriptor from a custom property?
by Peter Palotas 30 Nov '06

30 Nov '06

I'm wondering if it is somehow possible to attach a custom property (eg. a pointer to some object) to each vertex in a graph, and then lookup the vertex based on that index? My first attempt was to use a simple map outside of the graph, mapping my custom property to a vertex_descriptor, but since the vertex_descriptors seem to change as vertices are inserted and removed this does not work. Is it possible to do this using BGL? An example would be greatly appreciated. Sincerely, Peter

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more lambda issues
by Noah Roberts 30 Nov '06

30 Nov '06

I'm kind of loosing faith that this list ever responds to questions but here goes anyway. I've narrowed a problem down to this: #include <iostream> #include <boost/lambda/lambda.hpp> #include <boost/lambda/bind.hpp> struct test_b { test_b() { std::cerr << "test_b::test_b()\n"; } test_b(test_b const&) { std::cerr << "test_b::test_b(test_b const&)\n"; } virtual int f() = 0; //{ return 5; } }; struct test_d : test_b { test_d() : test_b() { std::cerr << "test_d::test_d()\n"; } test_d(test_d const& d) : test_b(d) { std::cerr << "test_d::test_d(test_d const&)\n"; } int f() { return 5; } }; int main(void) { namespace l = boost::lambda; test_b & td = test_d(); std::cerr << "Value: " << (l::bind(&test_b::f, l::_1))(td) << "\n"; int x; std::cin >> x; } Compiler result: cannot instantiate abstract class test_b. Because lambda doesn't seem to be able to handle smart pointers at all I have been trying to come up with a way to pass the dereferenced result into the function call. Nothing is working. In the end lambda must be able to handle the above in order to make this work. If lambda cannot handle this simple case I just don't see how it can be any use. The full compiler output follows: 1>c:\boost\include\boost-1_33_1\boost\tuple\detail\tuple_basic.hpp(419) : error C2259: 'test_b' : cannot instantiate abstract class 1> due to following members: 1> 'int test_b::f(void)' : is abstract 1> c:\documents and settings\nroberts\my documents\visual studio 2005\projects\playground\playground\playground.cpp(14) : see declaration of 'test_b::f' 1> c:\boost\include\boost-1_33_1\boost\tuple\detail\tuple_basic.hpp(329) : see reference to class template instantiation 'boost::tuples::cons<HT,TT>' being compiled 1> with 1> [ 1> HT=test_b, 1> TT=boost::lambda::detail::deduce_non_ref_argument_types_<boost::tuples::cons<const boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::detail::map_tuple_to_cons<boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>::type>::tail_type,boost::tuples::tuple<test_b &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::type 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\lambda_functor_base.hpp(151) : see reference to class template instantiation 'boost::tuples::cons<HT,TT>' being compiled 1> with 1> [ 1> HT=int (__thiscall test_b::* const )(void), 1> TT=boost::tuples::cons<test_b,boost::lambda::detail::deduce_non_ref_argument_types_<boost::tuples::cons<const boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::detail::map_tuple_to_cons<boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>::type>::tail_type,boost::tuples::tuple<test_b &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::type> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\lambda_functor_base.hpp(228) : see reference to class template instantiation 'boost::lambda::detail::has_null_type<Tuple>' being compiled 1> with 1> [ 1> Tuple=boost::tuples::cons<int (__thiscall test_b::* const )(void),boost::tuples::cons<test_b,boost::lambda::detail::deduce_non_ref_argument_types_<boost::tuples::cons<const boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::detail::map_tuple_to_cons<boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>::type>::tail_type,boost::tuples::tuple<test_b &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>::type>> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\lambda_functor_base.hpp(398) : see reference to class template instantiation 'boost::lambda::detail::deduce_non_ref_argument_types<Args,SigArgs>' being compiled 1> with 1> [ 1> Args=boost::tuples::tuple<int (__thiscall test_b::* const )(void),const boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>, 1> SigArgs=boost::tuples::tuple<test_b &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type> 1> ] 1> c:\documents and settings\nroberts\my documents\visual studio 2005\projects\playground\playground\playground.cpp(32) : see reference to class template instantiation 'boost::lambda::lambda_functor_base<Act,Args>::sig<SigArgs>' being compiled 1> with 1> [ 1> Act=boost::lambda::action<2,boost::lambda::function_action<2>>, 1> Args=boost::tuples::tuple<int (__thiscall test_b::* const )(void),const boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>, 1> SigArgs=boost::tuples::tuple<test_b &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type> 1> ]

5 7

Re: [Boost-users] Suggestion for boost`s smart pointers
by Sohail Somani 30 Nov '06

30 Nov '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of mark cox > Sent: Tuesday, November 28, 2006 2:37 PM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] Suggestion for boost`s smart pointers > > wow, this seems like a great idea, a scoped_ptr with deleter > would be v.useful. > mark I've been thinking something like (just something I hacked together just now). Not sure if there is a nicer way. #include <string> #include <cstdio> #include <iostream> template<typename T> struct DeletingDeleter { DeletingDeleter(T * p) { delete p; std::cout << "DeletingDeleter" << std::endl; } }; struct FileCloser { FileCloser(FILE * f) { std::cout << "Closing file" << std::endl; fclose(f); } }; template<typename T, typename Deleter=DeletingDeleter<T> > struct scoped_ptr { scoped_ptr():p_(0){} scoped_ptr(T * p):p_(p){} ~scoped_ptr() { Deleter d(p_); } T * get() {return p_;} // regular stuff private: T * p_; }; typedef scoped_ptr<FILE,FileCloser> file_ptr; int main() { scoped_ptr<int> a; // maintain old interface scoped_ptr<int> b(new int(5)); file_ptr p(fopen("myfile.txt","w")); fprintf(p.get(),"Hello world!\n"); }

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Re: [Boost-users] [Serialization] error C2027: use of undefined type 'boost::serialization::extended_type_info_null<T>'?
by Lawrence Spector 30 Nov '06

30 Nov '06

Ok, I got past the errors I was having last night. Seemed to have to do with the ordering of the libraries and then an incorrect constant used in the load method. Moving on, I now get the following linker errors: Linking... Creating library Debug/SerializationDemo.lib and object Debug/SerializationDemo.exp demo.obj : error LNK2019: unresolved external symbol "public: __thiscall boost::archive::basic_text_oprimitive<class std::basic_ostream<unsigned short,struct std::char_traits<unsigned short> > >::~basic_text_oprimitive<class std::basic_ostream<unsigned short,struct std::char_traits<unsigned short> > >(void)" (??1?$basic_text_oprimitive@V?$basic_ostream@GU?$char_traits@G@std@@@std @@@archive@boost@@QAE@XZ) referenced in function "public: __thiscall boost::archive::text_woarchive_impl<class boost::archive::text_woarchive>::~text_woarchive_impl<class boost::archive::text_woarchive>(void)" (??1?$text_woarchive_impl@Vtext_woarchive@archive@boost@@@archive@boost@ @QAE@XZ) demo.obj : error LNK2019: unresolved external symbol "public: __thiscall boost::archive::text_wiarchive_impl<class boost::archive::text_wiarchive>::text_wiarchive_impl<class boost::archive::text_wiarchive>(class std::basic_istream<unsigned short,struct std::char_traits<unsigned short> > &,unsigned int)" (??0?$text_wiarchive_impl@Vtext_wiarchive@archive@boost@@@archive@boost@ @QAE@AAV?$basic_istream@GU?$char_traits@G@std@@@std@@I@Z) referenced in function "public: __thiscall boost::archive::text_wiarchive::text_wiarchive(class std::basic_istream<unsigned short,struct std::char_traits<unsigned short> > &,unsigned int)" (??0text_wiarchive@archive@boost@@QAE@AAV?$basic_istream@GU?$char_traits @G@std@@@std@@I@Z) demo.obj : error LNK2019: unresolved external symbol "public: __thiscall boost::archive::basic_text_iprimitive<class std::basic_istream<unsigned short,struct std::char_traits<unsigned short> > >::~basic_text_iprimitive<class std::basic_istream<unsigned short,struct std::char_traits<unsigned short> > >(void)" (??1?$basic_text_iprimitive@V?$basic_istream@GU?$char_traits@G@std@@@std @@@archive@boost@@QAE@XZ) referenced in function "public: __thiscall boost::archive::text_wiarchive_impl<class boost::archive::text_wiarchive>::~text_wiarchive_impl<class boost::archive::text_wiarchive>(void)" (??1?$text_wiarchive_impl@Vtext_wiarchive@archive@boost@@@archive@boost@ @QAE@XZ) demo.obj : error LNK2019: unresolved external symbol "public: __thiscall boost::archive::basic_text_oprimitive<class std::basic_ostream<unsigned short,struct std::char_traits<unsigned short> > >::basic_text_oprimitive<class std::basic_ostream<unsigned short,struct std::char_traits<unsigned short> > >(class std::basic_ostream<unsigned short,struct std::char_traits<unsigned short> > &,bool)" (??0?$basic_text_oprimitive@V?$basic_ostream@GU?$char_traits@G@std@@@std @@@archive@boost@@QAE@AAV?$basic_ostream@GU?$char_traits@G@std@@@std@@_N @Z) referenced in function "public: __thiscall boost::archive::text_woarchive_impl<class boost::archive::text_woarchive>::text_woarchive_impl<class boost::archive::text_woarchive>(class std::basic_ostream<unsigned short,struct std::char_traits<unsigned short> > &,unsigned int)" (??0?$text_woarchive_impl@Vtext_woarchive@archive@boost@@@archive@boost@ @QAE@AAV?$basic_ostream@GU?$char_traits@G@std@@@std@@I@Z) Debug/SerializationDemo.exe : fatal error LNK1120: 4 unresolved externals However, if I change the build type to not be unicode, then it all compiles, links, and works. I checked to see what libraries are being linked in a non- unicode build vs. a unicode: Non-Unicode: Linking to lib file: libboost_serialization-vc71-sgd-1_33_1.lib // Good Linking to lib file: libboost_serialization-vc71-sgd-1_33_1.lib // Good Unicode: Linking to lib file: libboost_wserialization-vc71-sgd-1_33_1.lib // Good Linking to lib file: libboost_serialization-vc71-sgd-1_33_1.lib // Why?? Linking to lib file: libboost_serialization-vc71-sgd-1_33_1.lib // Why?? Any ideas? Does the boost serialization possibly have unicode issues in 1.33.1? Thanks in advance, Lawrence

2 1

Re: [Boost-users] serialize explicit template instantiation
by Reusser, Edward 30 Nov '06

30 Nov '06

This email was an eye popper for me because I have never had any luck declaring a template function in a header file and defining the implementation in a cpp file. I either get compilation/link errors, or very odd run-time problems. My understanding is that many compilers (of which mine, the MSVC 7.1 compiler) simply cannot handle this situation at all. I have always had to include the actual implementation of the template function inside the header file, which is a real pain. Note that this has nothing to do with the serialization per se. Are other people finding that newer compilers are finally able to handle this? I have several projects that I could improve by splitting the implementation code away from the headers. Ed -----Original Message----- From: Robert Ramey [mailto:ramey@rrsd.com] Sent: Wednesday, November 29, 2006 8:33 AM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] serialize explicit template instantiation I just compiled, linked and ran the following program on my system: vc 7.1 Boost 1.35 - HEAD There was no need to explicitly instantiate anything. Robert Ramey #include <boost/serialization/string.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/utility.hpp> #include <boost/serialization/version.hpp> class CSerTest { std::string a_, b_, c_; friend class boost::serialization::access; template<class Archive> void serialize( Archive & ar, const unsigned int ); public: CSerTest(); }; BOOST_CLASS_VERSION(CSerTest, 1); // Class.cpp #include <boost/archive/xml_oarchive.hpp> #include <boost/archive/xml_iarchive.hpp> CSerTest::CSerTest() : a_("1"), b_("2"), c_("3") { } template<class Archive> void CSerTest::serialize( Archive & ar, const unsigned int ) { ar & BOOST_SERIALIZATION_NVP(a_) & BOOST_SERIALIZATION_NVP(b_) & BOOST_SERIALIZATION_NVP(c_); } // main.cpp #include <fstream> ///////////////////////// without effect //////////////////////////////////// //template void CSerTest::serialize<boost::archive::xml_oarchive>(boost::archive::xml_oa rchive&, unsigned int ); int main() { const CSerTest instance; std::ofstream ofs( "out_file.txt" ); boost::archive::xml_oarchive oxa( ofs ); oxa << BOOST_SERIALIZATION_NVP(instance); } The information contained in or attached to this email may be subject to the Export Administration Regulations (EAR), administered by the U.S. Department of Commerce, or the International Traffic in Arms Regulations (ITAR), administered by the U.S. Department of State, and may require an export license from the Commerce or State Department prior to its export. An export can include a release or disclosure to a foreign national inside or outside the United States. Include this notice with any reproduced portion of this information.

3 2

Re: [Boost-users] more lambda issues
by Johan Torp 30 Nov '06

30 Nov '06

I haven't read all of your posts but I think your main problem is that boost bind stores arguments by value and takes them by reference. Because of this it requires lvalues as arguments. You can either add an internal bind to boost::shared_ptrs get() method which returns a raw pointer that can be bound or you can make a functor which accepts a raw pointer (given it won't outlive the shared_ptr). The latter requires you to create a temporary raw pointer when calling the functor since you need an lvalue. Consider the following: struct A{ int foo() {} }; int main() { boost::shared_ptr<A> sa; bind(&A::foo, bind(&boost::shared_ptr<A>::get,_1))(sa); A* pa=sa.get(); bind(&A::foo, _1)(pa); } Best Regards, Johan Torp boost-users-request(a)lists.boost.org wrote: >On 11/29/06, "JOAQUIN LOPEZ MU?Z" <joaquin(a)tid.es> wrote: > >First, thank you for your response. > > > >> std::cerr << "Value: " << >> (l::bind(&test_b::f, l::_1))(boost::ref(td)) << "\n"; >> >> > >Well, I tried putting ref on the other side but this works...my way didn't. > >Now I would need to find how to use this solution for my original >problem when td is actually a shared_ptr to an abstract base: > >boost::shared_ptr<test_b> td = boost::shared_ptr<test_b>(new test_d); > >This does not work: > >l::bind(l::bind(&test_b::f, l::_1), boost::ref(*l::_1))(td) > >Unlike boost::bind, lambda::bind doesn't work like this: > >l::bind(&test_b::f, l::_1)(td) > >This does but can't be used in an algorithm on a container holding >smart pointers: > >l::bind(&test_b::f, l::_1)(boost::ref(*td)) > >Interestingly, boost::bind has an operator == that will allow me to >compare the result of f() to a value just fine...I thought I needed >lambda for this. Boost::bind doesn't suffer from an inability to work >directly with smart pointers and doesn't require special magic to use >them vs. raw vs. non-ptr. So my original problem is solved by tossing >lambda out the airlock but it might be worthwhile to find a way to >accomplish a smart pointer member call with lambda for the future. > >So in the end, my problem is thus: > >std::find_if(cont.begin(), cont.end(), bind(&deref_val_type::f, _1) == 5); > >How is that accomplished with lambda if cont holds smart pointers? So >far I haven't found any way... > > > -- System Developer TouchTable AB Tel: +46 (0)31 773 68 12 johan.torp(a)touchtable.se

1 0

Re: [Boost-users] odd msvc 7.1 compilation errors with mpl
by Küppers, Ben 30 Nov '06

30 Nov '06

craigp wrote: > For some reason, I can't get the IDE to compile BOOST_MPL_ASSERT. <snip> > anyone else seen something like this before?? all the mpl regression tests > compile fine via bjam (using msvc 7.1), so it appears ide-specific, > somehow... I am seeing the same behaviour. I also noticed that a release build seems to be immune to this problem. Also, the problem goes away as soon as the two character types are replaced by template classes and the character types are passed in later. #include <boost/type_traits/is_same.hpp> #include <boost/mpl/assert.hpp> template< class T, class U > struct my { BOOST_MPL_ASSERT( ( boost::is_same< T, U > ) ); // ok }; my<char,char> test; template< class T, class U > void f() { // ... BOOST_MPL_ASSERT( ( boost::is_same< T, U > ) ); // ok BOOST_MPL_ASSERT( ( boost::is_same< char, char > ) ); // ok }; int main() { f< char, char >(); BOOST_MPL_ASSERT( ( boost::is_same< char, char > ) ); // fail } -Ben This e-mail and any attachment is for authorised use by the intended recipient(s) only. It may contain proprietary material, confidential information and/or be subject to legal privilege. It should not be copied, disclosed to, retained or used by, any other party. If you are not an intended recipient then please promptly delete this e-mail and any attachment and all copies and inform the sender. Thank you.

1 0

gccxml compilation error with msc
by craigp 30 Nov '06

30 Nov '06

hello - i'm using gccxml (with pygccxml to generate python wrappers and fusion extension code), and under msc (7.1 in this case) i get compilation errors. it's a trivial fix, since gccxml attempts to emulate msc, it just needs another check in a couple files (naturally you'll probably want to rename 'CDP_USING_GCCXML'). i thought i'd send a patch, since i think others may try using gccxml (esp. since pygccxml is shaping up quite nicely). there are probably other places where this may be a problem, but for now, they're the only ones i've run into. HTH, --craig cvs -z9 diff -u -- and.hpp or.hpp (in directory D:\dev\boost.cvs\boost\boost\mpl\) Index: and.hpp =================================================================== RCS file: /cvsroot/boost/boost/boost/mpl/and.hpp,v retrieving revision 1.5 diff -u -r1.5 and.hpp --- and.hpp 2 Sep 2004 15:40:41 -0000 1.5 +++ and.hpp 30 Nov 2006 09:08:40 -0000 @@ -28,7 +28,7 @@ // 'or' and 'and' macros, see http://tinyurl.com/3et69; 'defined(and)' // has to be checked in a separate condition, otherwise GCC complains // about 'and' being an alternative token -#if defined(_MSC_VER) +#if defined(_MSC_VER) && !defined(CDP_USING_GCCXML) #if defined(and) # pragma push_macro("and") # undef and @@ -39,7 +39,7 @@ # define BOOST_MPL_PREPROCESSED_HEADER and.hpp # include <boost/mpl/aux_/include_preprocessed.hpp> -#if defined(_MSC_VER) +#if defined(_MSC_VER) && !defined(CDP_USING_GCCXML) #if defined(and) # pragma pop_macro("and") #endif Index: or.hpp =================================================================== RCS file: /cvsroot/boost/boost/boost/mpl/or.hpp,v retrieving revision 1.4 diff -u -r1.4 or.hpp --- or.hpp 2 Sep 2004 15:40:42 -0000 1.4 +++ or.hpp 30 Nov 2006 09:08:46 -0000 @@ -29,7 +29,7 @@ // 'or' and 'and' macros, see http://tinyurl.com/3et69; 'defined(or)' // has to be checked in a separate condition, otherwise GCC complains // about 'or' being an alternative token -#if defined(_MSC_VER) +#if defined(_MSC_VER) && !defined(CDP_USING_GCCXML) #if defined(or) # pragma push_macro("or") # undef or @@ -40,7 +40,7 @@ # define BOOST_MPL_PREPROCESSED_HEADER or.hpp # include <boost/mpl/aux_/include_preprocessed.hpp> -#if defined(_MSC_VER) +#if defined(_MSC_VER) && !defined(CDP_USING_GCCXML) #if defined(or) # pragma pop_macro("or") #endif ____________________________________________________________________________________ Want to start your own business? Learn how on Yahoo! Small Business. http://smallbusiness.yahoo.com/r-index

1 0

Re: [Boost-users] Boost Lambda Newbie question
by Haroon Khan 30 Nov '06

30 Nov '06

Hi, I'm experimenting with the boost lambda library, and I wrote the following code, to go through the vector of numbers and print out statements if the number is greater than 5 or less than 5 int a[]={1,2,3,4,5,6,7,8,9,10,10,9,8,4,7,6,5,4,3,3,1}; std::vector<int> v(a,a+sizeof(a)/sizeof(int)); std::for_each ( v.begin() , v.end() , (if_(_1<5)[ std::cout<<var((boost::format("%d is less than 5\n")%_1).str()) ].else_[ std::cout<<var((boost::format("%d is greater than 5\n")%_1).str()) ]) ); The boost::basic_format::operator % code gives an assertion since the object that is being passed is the placeholder object, and not the current value. Is there a correct way of doing this? Thanks, Haroon

2 4

[iostreams] Any simple examples on implementing a Symmetric_filter?
by eg 30 Nov '06

30 Nov '06

Hi all, I'm new to the iostreams library. It looks pretty cool. We have a bunch of existing objects which already have interfaces for reading and writing their state to a stream, e.g. MyWrite(std::ostream &out) and MyRead(std::istream &in) I've convinced myself I can filter these with iostreams, as I prototyped setting up a filtering stream with an existing gzip_compressor() filter, then reversed it with a gzip_decompressor(). Nice. Now, what I want to do is write my own filter, and thought that a symmetric_filter met my needs based on the description. Unfortunately, there are no simple examples in the tutorial section, and the documentation seems a bit weaker in this area. As a first kick at the can, reading the zlib/bzip implementations is a bit dense to pick out the nuances. Does anyone have an identity_filter example (based on symmetric_filter) that just copies input to output characters? ... or given some dumb c function like the following, how to construct a symmetric_filter using it. my_dumb_crypt(char* in, char* out, char *pwd, int len) { for (int i=0; i < len; ++i) // assumes in, out, and pwd are len long out[i] = in[i] ^ pwd[i]; } Thanks. eg

1 0

[Serialization] error C2027: use of undefined type 'boost::serialization::extended_type_info_null<T>'?
by Lawrence Spector 30 Nov '06

30 Nov '06

Hi all. I'm playing with the boost::serialization library, but having a compile issue, with a very obscure error message. It is as follows: Compiler: VC7.1 on Windows XP I get the following compile errors: Compiling... TestClass.cpp c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\detail\iserialize r.hpp(142) : error C2027: use of undefined type 'boost::serialization::extended_type_info_null<T>' with [ T=CppTestClass ] c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\detail\iserialize r.hpp(142) : see reference to class template instantiation 'boost::serialization::extended_type_info_null<T>' being compiled with [ T=CppTestClass ] c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\detail\iserialize r.hpp(138) : while compiling class-template member function 'bool boost::archive::detail::iserializer<Archive,T>::is_polymorphic(void) const' with [ Archive=boost::archive::text_wiarchive, T=CppTestClass ] c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\detail\iserialize r.hpp(375) : see reference to class template instantiation 'boost::archive::detail::iserializer<Archive,T>' being compiled with [ Archive=boost::archive::text_wiarchive, T=CppTestClass ] c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\detail\iserialize r.hpp(369) : while compiling class-template member function 'void boost::archive::detail::load_non_pointer_type<Archive,T>::load_standard: :invoke(Archive &,T &)' with [ Archive=boost::archive::text_wiarchive, T=CppTestClass ] c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\detail\iserialize r.hpp(425) : see reference to class template instantiation 'boost::archive::detail::load_non_pointer_type<Archive,T>::load_standard ' being compiled with [ Archive=boost::archive::text_wiarchive, T=CppTestClass ] c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\detail\iserialize r.hpp(418) : while compiling class-template member function 'void boost::archive::detail::load_non_pointer_type<Archive,T>::invoke(Archive &,T &)' with [ Archive=boost::archive::text_wiarchive, T=CppTestClass ] c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\detail\iserialize r.hpp(572) : see refe rence to class template instantiation 'boost::archive::detail::load_non_pointer_type<Archive,T>' being compiled with [ Archive=boost::archive::text_wiarchive, T=CppTestClass ] c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\basic_text_iarchi ve.hpp(64) : see reference to function template instantiation 'void boost::archive::load<Archive,T>(Archive &,T &)' being compiled with [ Archive=boost::archive::text_wiarchive, T=CppTestClass ] c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\text_wiarchive.hp p(68) : see reference to function template instantiation 'void boost::archive::basic_text_iarchive<Archive>::load_override<T>(T &,int)' being compiled with [ Archive=boost::archive::text_wiarchive, T=CppTestClass ] c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\detail\interface_ iarchive.hpp(76) : see reference to function template instantiation 'void boost::archive::text_wiarchive_impl<Archive>::load_override<T>(T &,int)' being compiled with [ Archive=boost::archive::text_wiarchive, T=CppTestClass ] c:\Work\Sandbox\CppThroughCOM\CppThroughCOM\TestClass.cpp(67) : see reference to function template instantiation 'Archive &boost::archive::detail::interface_iarchive<Archive>::operator >><CppTestClass>(T &)' being compiled with [ Archive=boost::archive::text_wiarchive, T=CppTestClass ] c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\detail\iserialize r.hpp(142) : error C2146: syntax error : missing ';' before identifier 'typex' c:\Dev.Releasev7.2.CR4556\3rdparty\boost\boost\archive\detail\iserialize r.hpp(142) : error C2065: 'typex' : undeclared identifier Here's my code: CppTestClass.hpp: #pragma once #include <boost/serialization/serialization.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/version.hpp> class CppTestClass { private: int m_x; public: CppTestClass(void); virtual ~CppTestClass(void); private: friend class boost::serialization::access; template<class Archive> void load(Archive & ar, const unsigned int version) { ar & version; ar & m_x; } template<class Archive> void save(Archive & ar, const unsigned int version) const { ar & version; ar & m_x; } public: friend std::wostream& operator<<(std::wostream& p_stream, const CppTestClass& p_testClass) { p_stream << p_testClass.m_x; return p_stream; } friend std::wistream& operator>>(std::wistream& p_stream, CppTestClass& p_testClass) { p_stream >> p_testClass.m_x; return p_stream; } BOOST_SERIALIZATION_SPLIT_MEMBER() public: void setX(int p_x) { m_x = p_x; } int getX() const { return m_x; } }; BOOST_CLASS_VERSION(CppTestClass, 1) In TestClass.cpp: This gives no compile errors: std::wstringstream ofs; boost::archive::text_woarchive oa(ofs); // write class instance to archive ofs << m_cppTestClass; ofs >> serData; However, this does: // create and open an archive for input std::wstringstream ifs; ifs << serData; boost::archive::text_wiarchive ia(ifs); // read class state from archive ia >> m_cppTestClass; //!!! errant line? Any ideas what's going on? Thanks in advance, Lawrence

1 0

lambda warning
by Noah Roberts 29 Nov '06

29 Nov '06

This is about the same function but has been changed to this definition: template < typename T > typename T::const_iterator first_pipe(T const& cont) { namespace l = boost::lambda; typedef esi::metafunc::dereference_type<typename T::value_type>::type value_type; return std::find_if(cont.begin(), cont.end(), (l::bind(&value_type::GetType, *(l::_1))) == DT_PIPE); } Reason being that the function would work ok with containers holding raw pointers but couldn't resolve for smart pointers like shared_ptr. This way works for both, but with shared_ptr I get the warning pasted at the end of this message. Gnu handles it fine even with -Wall and -pedantic. Is there a better way to do what I'm doing and get rid of the warning or do I just need to supress it? Thanks. 1>c:\boost\include\boost-1_33_1\boost\lambda\detail\operator_return_type_traits.hpp(240) : warning C4181: qualifier applied to reference type; ignored 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\lambda_traits.hpp(45) : see reference to class template instantiation 'boost::lambda::detail::contentsof_type<A>' being compiled 1> with 1> [ 1> A=const boost::shared_ptr<mock_pipe> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\lambda_traits.hpp(53) : see reference to class template instantiation 'boost::lambda::detail::IF_type_<T>' being compiled 1> with 1> [ 1> T=boost::lambda::detail::contentsof_type<const boost::shared_ptr<mock_pipe>> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\operator_return_type_traits.hpp(314) : see reference to class template instantiation 'boost::lambda::detail::IF_type<C,T,E>' being compiled 1> with 1> [ 1> C=true, 1> T=boost::lambda::detail::contentsof_type<const boost::shared_ptr<mock_pipe>>, 1> E=boost::lambda::detail::identity_mapping<boost::lambda::detail::unspecified> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\return_type_traits.hpp(88) : see reference to class template instantiation 'boost::lambda::return_type_1<Act,A>' being compiled 1> with 1> [ 1> Act=boost::lambda::other_action<boost::lambda::contentsof_action>, 1> A=const boost::shared_ptr<mock_pipe> & 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\operator_lambda_func_base.hpp(79) : see reference to class template instantiation 'boost::lambda::return_type_1_prot<Act,A>' being compiled 1> with 1> [ 1> Act=boost::lambda::other_action<boost::lambda::contentsof_action>, 1> A=const boost::shared_ptr<mock_pipe> & 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\operator_lambda_func_base.hpp(248) : see reference to class template instantiation 'boost::lambda::detail::unary_rt<Action,Bound,Open>' being compiled 1> with 1> [ 1> Action=boost::lambda::other_action<boost::lambda::contentsof_action>, 1> Bound=boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, 1> Open=boost::tuples::tuple<const boost::shared_ptr<mock_pipe> &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\lambda_functor_base.hpp(191) : see reference to class template instantiation 'boost::lambda::lambda_functor_base<Act,Args>::sig<SigArgs>' being compiled 1> with 1> [ 1> Act=boost::lambda::other_action<boost::lambda::contentsof_action>, 1> Args=boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, 1> SigArgs=boost::tuples::tuple<const boost::shared_ptr<mock_pipe> &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\lambda_functor_base.hpp(197) : see reference to class template instantiation 'boost::lambda::detail::deduce_non_ref_argument_types_<Args,SigArgs>' being compiled 1> with 1> [ 1> Args=boost::tuples::cons<const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>,boost::tuples::detail::map_tuple_to_cons<boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>::type>, 1> SigArgs=boost::tuples::tuple<const boost::shared_ptr<mock_pipe> &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\lambda_functor_base.hpp(225) : see reference to class template instantiation 'boost::lambda::detail::deduce_non_ref_argument_types_<Args,SigArgs>' being compiled 1> with 1> [ 1> Args=boost::tuples::tuple<DT_TYPE (__thiscall mock_pipe::* const )(void) const,const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>, 1> SigArgs=boost::tuples::tuple<const boost::shared_ptr<mock_pipe> &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\lambda_functor_base.hpp(398) : see reference to class template instantiation 'boost::lambda::detail::deduce_non_ref_argument_types<Args,SigArgs>' being compiled 1> with 1> [ 1> Args=boost::tuples::tuple<DT_TYPE (__thiscall mock_pipe::* const )(void) const,const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>, 1> SigArgs=boost::tuples::tuple<const boost::shared_ptr<mock_pipe> &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\lambda_functor_base.hpp(164) : see reference to class template instantiation 'boost::lambda::lambda_functor_base<Act,Args>::sig<SigArgs>' being compiled 1> with 1> [ 1> Act=boost::lambda::action<2,boost::lambda::function_action<2>>, 1> Args=boost::tuples::tuple<DT_TYPE (__thiscall mock_pipe::* const )(void) const,const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>, 1> SigArgs=boost::tuples::tuple<const boost::shared_ptr<mock_pipe> &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\lambda_functor_base.hpp(213) : see reference to class template instantiation 'boost::lambda::detail::deduce_argument_types_<Args,SigArgs>' being compiled 1> with 1> [ 1> Args=boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<DT_TYPE (__thiscall mock_pipe::* const )(void) const,const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>>,const DT_TYPE,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, 1> SigArgs=boost::tuples::tuple<const boost::shared_ptr<mock_pipe> &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\operator_lambda_func_base.hpp(60) : see reference to class template instantiation 'boost::lambda::detail::deduce_argument_types<Args,SigArgs>' being compiled 1> with 1> [ 1> Args=boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<DT_TYPE (__thiscall mock_pipe::* const )(void) const,const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>>,const DT_TYPE,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, 1> SigArgs=boost::tuples::tuple<const boost::shared_ptr<mock_pipe> &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type> 1> ] 1> c:\boost\include\boost-1_33_1\boost\lambda\detail\operator_lambda_func_base.hpp(222) : see reference to class template instantiation 'boost::lambda::detail::binary_rt<Action,Bound,Open>' being compiled 1> with 1> [ 1> Action=boost::lambda::relational_action<boost::lambda::equal_action>, 1> Bound=boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<DT_TYPE (__thiscall mock_pipe::* const )(void) const,const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>>,const DT_TYPE,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, 1> Open=boost::tuples::tuple<const boost::shared_ptr<mock_pipe> &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type> 1> ] 1> c:\program files\microsoft visual studio 8\vc\include\algorithm(87) : see reference to class template instantiation 'boost::lambda::lambda_functor_base<Act,Args>::sig<SigArgs>' being compiled 1> with 1> [ 1> Act=boost::lambda::relational_action<boost::lambda::equal_action>, 1> Args=boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<DT_TYPE (__thiscall mock_pipe::* const )(void) const,const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>>,const DT_TYPE,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, 1> SigArgs=boost::tuples::tuple<const boost::shared_ptr<mock_pipe> &,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type> 1> ] 1> c:\program files\microsoft visual studio 8\vc\include\algorithm(96) : see reference to function template instantiation '_InIt std::_Find_if<std::list<_Ty>::_Const_iterator<_Secure_validation>,_Pr>(_InIt,_InIt,_Pr)' being compiled 1> with 1> [ 1> _InIt=std::list<boost::shared_ptr<mock_pipe>>::_Const_iterator<false>, 1> _Ty=boost::shared_ptr<mock_pipe>, 1> _Secure_validation=false, 1> _Pr=boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::relational_action<boost::lambda::equal_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<DT_TYPE (__thiscall mock_pipe::* const )(void) const,const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>>,const DT_TYPE,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>> 1> ] 1> c:\documents and settings\nroberts\my documents\visual studio 2005\projects\playground\playground\playground.cpp(44) : see reference to function template instantiation '_InIt std::find_if<std::list<_Ty>::_Const_iterator<_Secure_validation>,boost::lambda::lambda_functor<T>>(_InIt,_InIt,_Pr)' being compiled 1> with 1> [ 1> _InIt=std::list<boost::shared_ptr<mock_pipe>>::_Const_iterator<true>, 1> _Ty=boost::shared_ptr<mock_pipe>, 1> _Secure_validation=true, 1> T=boost::lambda::lambda_functor_base<boost::lambda::relational_action<boost::lambda::equal_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<DT_TYPE (__thiscall mock_pipe::* const )(void) const,const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>>,const DT_TYPE,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>, 1> _Pr=boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::relational_action<boost::lambda::equal_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,boost::lambda::function_action<2>>,boost::tuples::tuple<DT_TYPE (__thiscall mock_pipe::* const )(void) const,const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::contentsof_action>,boost::tuples::tuple<boost::lambda::lambda_functor<boost::lambda::placeholder<1>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type,boost::lambda::detail::bind_traits<boost::tuples::null_type>::type>>>,const DT_TYPE,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>> 1> ] 1> c:\documents and settings\nroberts\my documents\visual studio 2005\projects\playground\playground\playground.cpp(65) : see reference to function template instantiation 'std::list<_Ty>::_Const_iterator<_Secure_validation> first_pipe<list1_t>(const T &)' being compiled 1> with 1> [ 1> _Ty=boost::shared_ptr<mock_pipe>, 1> _Secure_validation=true, 1> T=list1_t 1> ]

1 0

lambda help
by Noah Roberts 29 Nov '06

29 Nov '06

If I change the parameter of first_pipe to "T & cont" this code compiles. As it stands I get this error on the lambda part of the algorithm call. Error 1 error C2664: 'std::list<_Ty>::_Iterator<_Secure_validation>::_Iterator(const std::list<_Ty>::_Iterator<_Secure_validation> &)' : cannot convert parameter 1 from 'std::list<_Ty>::_Const_iterator<_Secure_validation>' to 'const std::list<_Ty>::_Iterator<_Secure_validation> &' How can I adjust my usage so that the lambda function construction resolves the correct constness and will accept the const iterator? Thanks....code follows. #include <iostream> #include <list> #include <boost/shared_ptr.hpp> #include <boost/lambda/lambda.hpp> #include <boost/lambda/bind.hpp> #include <boost/shared_ptr.hpp> namespace esi { namespace metafunc { template < typename T > struct dereference_type { typedef T type; }; template < typename T > struct dereference_type< T* > { typedef T type; }; template < typename T > struct dereference_type< boost::shared_ptr< T > > { typedef T type; }; } } template < typename T > typename T::iterator first_pipe(T const& cont) { namespace l = boost::lambda; typedef esi::metafunc::dereference_type<T::value_type>::type value_type; return std::find_if(cont.begin(), cont.end(), l::bind(&value_type::GetType, l::_1) == DT_PIPE); } enum DT_TYPE { DT_PUMP, DT_PIPE }; struct mock_pipe { bool pipe; mock_pipe(bool b) : pipe(b) {} DT_TYPE GetType() const { return pipe ? DT_PIPE : DT_PUMP; } }; void test_first_pipe() { typedef std::list<mock_pipe*> list1_t; std::list<mock_pipe*> l; l.push_back(new mock_pipe(false)); l.push_back(new mock_pipe(false)); l.push_back(new mock_pipe(false)); list1_t::iterator fit = first_pipe(l); } int main(void) { test_first_pipe(); }

1 1

Re: [Boost-users] Suggestion for boost`s smart pointers
by Sohail Somani 29 Nov '06

29 Nov '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of David Klein > > Sohail Somani wrote: > >> -----Original Message----- > >> From: boost-users-bounces(a)lists.boost.org > >> [mailto:boost-users-bounces@lists.boost.org] On Behalf Of mark cox > >> > >> wow, this seems like a great idea, a scoped_ptr with deleter > >> would be v.useful. > >> mark > >> > > > > I've been thinking something like (just something I hacked > together just > > now). Not sure if there is a nicer way. > > [snip] > +1 vote for this idea :) > > i actually kind of did this for my current project, > because i needed a custom deleter for scoped_ptr, > when shared_ptr was to much overhead... As did I, but it was not for performance but for readability. Shared pointers mean... Shared. Scoped don't.

6 8

Re: [Boost-users] Suggestion for boost`s smart pointers
by Sohail Somani 29 Nov '06

29 Nov '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Maitre Bart > Sent: Wednesday, November 29, 2006 8:50 AM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users]Suggestion for boost`s smart pointers > > Richard Hadsell <hadsell <at> blueskystudios.com> writes: > > > David Klein wrote: > > [...] If you can implement the feature without adding any data > > members, fine. Otherwise, please create a new class. > > I agree too! > Why not calling it raii_ptr? I like this idea. Defaults to delete?

1 0

Re: [Boost-users] Suggestion for boost`s smart pointers
by Sohail Somani 29 Nov '06

29 Nov '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Sohail Somani > > The deleter feature in shared_ptr is very useful for raii > > with any kind of > > resource (variables, functions, objects, etc.). Having it in > > scoped_ptr will > > offer the same advantage for noncopyable pointers. > > > > Thank you. > > +1 from me too but I think the reason is that people wanted > sizeof(scoped_ptr<T>) to be sizeof(T *) (or they don't want it to > change) A part solution could be a second template parameter but of course there can be no state.

4 3

serialize explicit template instantiation
by Jan Boehme 29 Nov '06

29 Nov '06

Hi, I want to use a non inline serialize method of a class. When instantiating it not explicitly the linker quits with undefined symbols. So I tried to instantiate it that way and it does not work anyway. Here is my code. Does anyone see what I've done wrong? I did also try to use export.hpp but it doesn't help too. Thank you very much, Jan. // Class.hpp #include <boost/archive/xml_oarchive.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/serialization/string.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/utility.hpp> class CSerTest { std::string a_, b_, c_; friend class boost::serialization::access; template<class Archive> void serialize( Archive & ar, const unsigned int ); public: CSerTest(); }; BOOST_CLASS_VERSION(CSerTest, 1); // Class.cpp #include "Class.hpp" CSerTest::CSerTest() : a_("1"), b_("2"), c_("3") { } template<class Archive> void CSerTest::serialize( Archive & ar, const unsigned int ) { ar & BOOST_SERIALIZATION_NVP(a_) & BOOST_SERIALIZATION_NVP(b_) & BOOST_SERIALIZATION_NVP(c_); } // main.cpp #include <fstream> #include "Class.hpp" ///////////////////////// without effect //////////////////////////////////// template void CSerTest::serialize<boost::archive::xml_oarchive>(boost::archive::xml_oarchive&, unsigned int ); int main() { CSerTest instance; std::ofstream ofs( "out_file.txt" ); boost::archive::xml_oarchive oxa( ofs ); oxa << BOOST_SERIALIZATION_NVP(instance); } The linker (MS version 8) returns with: --- Creating library mytest.lib and object mytest.exp Main.obj : error LNK2019: unresolved external symbol "private: void __thiscall CSerTest::serialize<class boost::archive::xml_oarchive>(class boost::archive::xml_oarchive &,unsigned int)"(??$serialize@ Vxml_oarchive@archive@boost@@@CSerTest@@AAEXAAVxml_oarchive@archive@boost@@ I@Z) referenced in function "public: static void __cdeclboost::serialization::access::serialize<class boost::archive::xml_oarchive,class CSerTest>(class boost::archive::xml_oarchive &,class CSerTest &,unsigned int)"(??$serialize@ Vxml_oarchive@archive@boost@@VCSerTest@@@access@serialization@boost@@ SAXAAVxml_oarchive@archive@2@AAVCSerTest@@I@Z)mytest.exe : fatal error LNK1120: 1 unresolved externals

2 4

using lambda's pointer to member function and boost::function
by rodolfo＠rodsoft.org 29 Nov '06

29 Nov '06

Hi, I'm trying to put a simple lambda functor which uses pointer to member function into a boost::function like this: struct aux { int a() const { return 5; } }; int main() { function<int(const aux &)> f = &_1->*&aux::a; } But the compiler chokes at the assignment with the error: /usr/include/boost/function/function_template.hpp:119: error: cannot convert 'boost::lambda::detail::member_pointer_caller<int, const aux*, int (aux::*)()const>' to 'int' in return I think it should be able to convert the member_pointer_caller to boost::function, as its result (int) is the same of function's result, as well as its only argument is the one that makes the lambda functor valid. According to the documentation, something like this should work because it says that boost::function<int(int, int)> f = _1 + _2 works. Am I missing something? Thank you, Rodolfo Lima.

4 7

FW: Suggestion for boost`s smart pointers
by Sohail Somani 29 Nov '06

29 Nov '06

Hi, Please see the following email about additional template parameters for scoped_ptr. The quick hack I wrote for it is below (I've used this in previous project as well). I think it would be very useful to many users and wouldn't change any source using scoped_ptr. Thanks, Sohail ==== I've been thinking something like (just something I hacked together just now). Not sure if there is a nicer way. #include <string> #include <cstdio> #include <iostream> template<typename T> struct DeletingDeleter { DeletingDeleter(T * p) { delete p; std::cout << "DeletingDeleter" << std::endl; } }; struct FileCloser { FileCloser(FILE * f) { std::cout << "Closing file" << std::endl; fclose(f); } }; template<typename T, typename Deleter=DeletingDeleter<T> > struct scoped_ptr { scoped_ptr():p_(0){} scoped_ptr(T * p):p_(p){} ~scoped_ptr() { Deleter d(p_); } T * get() {return p_;} // regular stuff private: T * p_; }; typedef scoped_ptr<FILE,FileCloser> file_ptr; int main() { scoped_ptr<int> a; // maintain old interface scoped_ptr<int> b(new int(5)); file_ptr p(fopen("myfile.txt","w")); fprintf(p.get(),"Hello world!\n"); } > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of David Klein > Sent: Tuesday, November 28, 2006 4:55 PM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] Suggestion for boost`s smart pointers > > Sohail Somani wrote: > >> -----Original Message----- > >> From: boost-users-bounces(a)lists.boost.org > >> [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > David Klein > >> > >> Sohail Somani wrote: > >> > >>>> -----Original Message----- > >>>> From: boost-users-bounces(a)lists.boost.org > >>>> [mailto:boost-users-bounces@lists.boost.org] On Behalf > Of mark cox > >>>> > >>>> wow, this seems like a great idea, a scoped_ptr with deleter > >>>> would be v.useful. > >>>> mark > >>>> > >>>> > >>> I've been thinking something like (just something I hacked > >>> > >> together just > >> > >>> now). Not sure if there is a nicer way. > >>> > >>> > > [snip] > > > >> +1 vote for this idea :) > >> > >> i actually kind of did this for my current project, > >> because i needed a custom deleter for scoped_ptr, > >> when shared_ptr was to much overhead... > >> > > > > As did I, but it was not for performance but for readability. Shared > > pointers mean... Shared. Scoped don't. > > _______________________________________________ > > Boost-users mailing list > > Boost-users(a)lists.boost.org > > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > > > > > yep exactly, > thatswhy i "ripped" scoped_ptr out of boost and added my > custom_deleter > stuff. > (i only *thought* about shared_ptr to do the job) > > so are there any objections about adding this feature to scoped_ptr? > > -- > regards dave > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

1 0

[multiIndex] modify_key
by Jeffrey Holle 29 Nov '06

29 Nov '06

I'm using boost version 1.33.1 and am contemplating using a multiIndex container in my application. The held object will be something like: class element { int x; int y; Object *pObject; }; I need 2 ordered_non_unique indices using x and y and one ordered_unique index on pObject. The problem is that the values of x and y will need to be modified during the life of this container. Since the documentation says these indices are implemented using red-black trees, I think I'm heading for trouble. However, the multiIndex container seems to have a "modify_key" method. I can guarantee that the pObject value will not change, so if I obtain an iterator to an element based on this index, will I be able to modify either x or y and expect their related indices to still work?

2 2

Re: [Boost-users] Suggestion for boost`s smart pointers
by Sohail Somani 28 Nov '06

28 Nov '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Maitre Bart > Sent: Tuesday, November 28, 2006 12:36 PM > To: boost-users(a)lists.boost.org > Subject: [Boost-users] Suggestion for boost`s smart pointers > > I am assuming I am at the right tribune! (Let me know otherwise) > > I would suggest to add a constructor (as well as the > supporting members and > rules) to scoped_ptr<> that could allow specifying a deleter, as per: > > template<class Y, class D> scoped_ptr(Y * p, D d); > > as the same exists for shared_ptr<>. > > The deleter feature in shared_ptr is very useful for raii > with any kind of > resource (variables, functions, objects, etc.). Having it in > scoped_ptr will > offer the same advantage for noncopyable pointers. > > Thank you. +1 from me too but I think the reason is that people wanted sizeof(scoped_ptr<T>) to be sizeof(T *) (or they don't want it to change)

1 0

Suggestion for boost`s smart pointers
by Maitre Bart 28 Nov '06

28 Nov '06

I am assuming I am at the right tribune! (Let me know otherwise) I would suggest to add a constructor (as well as the supporting members and rules) to scoped_ptr<> that could allow specifying a deleter, as per: template<class Y, class D> scoped_ptr(Y * p, D d); as the same exists for shared_ptr<>. The deleter feature in shared_ptr is very useful for raii with any kind of resource (variables, functions, objects, etc.). Having it in scoped_ptr will offer the same advantage for noncopyable pointers. Thank you.

1 0

boost + linux + mingw ( g++: unrecognized option `-pthread' , cannot find -lrt )
by sfinks 28 Nov '06

28 Nov '06

Hi. Has anyone compiled boost on linux+mingw ? I have Debian Etch, mingw32 mingw32-binutils mingw32-runtime installed. mingw binaries linked as so: (CHROOT-wine-386)root@kroko386:~/boost_1_33_1# find /usr/bin/ -type l -ls|grep 586 9601281 0 lrwxrwxrwx 1 root root 26 Nov 24 08:16 /usr/bin/gcc-3.4.5 -> i586-mingw32msvc-gcc-3.4.5 9601293 0 lrwxrwxrwx 1 root root 24 Nov 24 08:16 /usr/bin/windres -> i586-mingw32msvc-windres 9601260 0 lrwxrwxrwx 1 root root 19 Nov 24 08:16 /usr/bin/cc -> i586-mingw32msvc-cc 9601282 0 lrwxrwxrwx 1 root root 23 Nov 24 08:16 /usr/bin/gccbug -> i586-mingw32msvc-gccbug 9601259 0 lrwxrwxrwx 1 root root 20 Nov 24 08:16 /usr/bin/c++ -> i586-mingw32msvc-c++ 9601275 0 lrwxrwxrwx 1 root root 20 Nov 24 08:14 /usr/bin/i586-mingw32msvc-cc -> i586-mingw32msvc-gcc 9601264 0 lrwxrwxrwx 1 root root 24 Nov 24 08:16 /usr/bin/c++filt -> i586-mingw32msvc-c++filt 9601284 0 lrwxrwxrwx 1 root root 19 Nov 24 08:16 /usr/bin/ld -> i586-mingw32msvc-ld 9601290 0 lrwxrwxrwx 1 root root 21 Nov 24 08:16 /usr/bin/size -> i586-mingw32msvc-size 9601278 0 lrwxrwxrwx 1 root root 20 Nov 24 08:16 /usr/bin/gcc -> i586-mingw32msvc-gcc 9601292 0 lrwxrwxrwx 1 root root 22 Nov 24 08:16 /usr/bin/strip -> i586-mingw32msvc-strip 9601285 0 lrwxrwxrwx 1 root root 19 Nov 24 08:16 /usr/bin/nm -> i586-mingw32msvc-nm 9601286 0 lrwxrwxrwx 1 root root 24 Nov 24 08:16 /usr/bin/objcopy -> i586-mingw32msvc-objcopy 9601283 0 lrwxrwxrwx 1 root root 21 Nov 24 08:16 /usr/bin/gcov -> i586-mingw32msvc-gcov 9601291 0 lrwxrwxrwx 1 root root 24 Nov 24 08:16 /usr/bin/strings -> i586-mingw32msvc-strings 9601271 0 lrwxrwxrwx 1 root root 24 Nov 24 08:16 /usr/bin/dllwrap -> i586-mingw32msvc-dllwrap 9601277 0 lrwxrwxrwx 1 root root 20 Nov 24 08:16 /usr/bin/g++ -> i586-mingw32msvc-g++ 9601287 0 lrwxrwxrwx 1 root root 24 Nov 24 08:16 /usr/bin/objdump -> i586-mingw32msvc-objdump 9601258 0 lrwxrwxrwx 1 root root 19 Nov 24 08:16 /usr/bin/as -> i586-mingw32msvc-as 9601027 0 lrwxrwxrwx 1 root root 26 Nov 24 08:16 /usr/bin/addr2line -> i586-mingw32msvc-addr2line 9601265 0 lrwxrwxrwx 1 root root 20 Nov 24 08:16 /usr/bin/cpp -> i586-mingw32msvc-cpp 9601289 0 lrwxrwxrwx 1 root root 24 Nov 24 08:16 /usr/bin/readelf -> i586-mingw32msvc-readelf 9601223 0 lrwxrwxrwx 1 root root 19 Nov 24 08:16 /usr/bin/ar -> i586-mingw32msvc-ar 9601266 0 lrwxrwxrwx 1 root root 24 Nov 24 08:16 /usr/bin/dlltool -> i586-mingw32msvc-dlltool 9601288 0 lrwxrwxrwx 1 root root 23 Nov 24 08:16 /usr/bin/ranlib -> i586-mingw32msvc-ranlib (CHROOT-wine-386)root@kroko386:~/boost_1_33_1# now I try to build with command: ~/bjam -sTOOLS=mingw -sGCC_INCLUDE_DIRECTORY=/usr/i586-mingw32msvc/include/ -sGCC_STDLIB_DIRECTORY=/usr/i586-mingw32msvc/lib/ --prefix=/opt/ gcc-C++-action bin/boost/libs/date_time/build/libboost_date_time.so/mingw/debug/shared-linkable-true/threading-multi/greg_month.o g++: unrecognized option `-pthread' /root/boost_1_33_1/libs/date_time/build/../src/gregorian/greg_month.cpp:1: warning: -fPIC ignored for target (all code is position independent) gcc-C++-action bin/boost/libs/date_time/build/libboost_date_time.so/mingw/debug/shared-linkable-true/threading-multi/greg_weekday.o g++: unrecognized option `-pthread' /root/boost_1_33_1/libs/date_time/build/../src/gregorian/greg_weekday.cpp:1: warning: -fPIC ignored for target (all code is position independent) gcc-C++-action bin/boost/libs/date_time/build/libboost_date_time.so/mingw/debug/shared-linkable-true/threading-multi/date_generators.o g++: unrecognized option `-pthread' /root/boost_1_33_1/libs/date_time/build/../src/gregorian/date_generators.cpp:1: warning: -fPIC ignored for target (all code is position independent) gcc-Link-action bin/boost/libs/date_time/build/libboost_date_time.so/mingw/debug/shared-linkable-true/threading-multi/libboost_date_time-mgw-mt-d-1_33_1.so g++: unrecognized option `-pthread' /usr/lib/gcc/i586-mingw32msvc/3.4.5/../../../../i586-mingw32msvc/bin/ld: cannot find -lrt collect2: ld returned 1 exit status What about those: 1) g++: unrecognized option `-pthread' 2) /usr/lib/gcc/i586-mingw32msvc/3.4.5/../../../../i586-mingw32msvc/bin/ld: cannot find -lrt collect2: ld returned 1 exit status Thanks..

5 9

Re: [Boost-users] Boost-Jam - Building Boost.Python extensions
by Lawrence Spector 28 Nov '06

28 Nov '06

Oops. Thanks for the assistance and quick response! =) -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Vladimir Prus Sent: Monday, November 27, 2006 9:54 AM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] Boost-Jam - Building Boost.Python extensions Lawrence Spector wrote: > Hello all. Quick question on boost-jam, because I couldn't get it work > right on my system. When I went into the > $BOOST_ROOT_DIR\libs\python\example\tutorial directory and build as > follows: > > > > bjam -sTOOLS=vc-7_1 > > > > It built with no problems. > > > I then took the tutorial example and moved it outside the boost tree. I > edited the Jamrules so that: > > > > path-global BOOST_ROOT : ../../../.. ; You need to *also* set BOOST_ROOT in environment. The above is Boost.Build definition, and for it to have any effect, or be even read, bjam must be able to find Boost.Build first. - Volodya _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

1 0

Graph: bug with gcc 4.1.1 and headers
by Todd A. Gibson 28 Nov '06

28 Nov '06

Problem: transitive_closure.hpp won't compile if depth_first_search.hpp is included before including transitive_closure.hpp . This problem occurs when compiling with gcc 4.1.1. This problem does not occur with gcc 3.3.5 To reproduce: Edit example/transitive_closure.cpp and add: #include <boost/graph/depth_first_search.hpp> before #include <boost/graph/transitive_closure.hpp> Thanks, -TAG

1 0

[Boost.Test] multithreading
by Andrea Murru 28 Nov '06

28 Nov '06

Hi! I have started some experiment with boost.test library, and I found it very flexible and quite simple to use. My question is very simple: what are guaranties about multithreading ? Can I call BOOST_CHECK from different threads ? Can I check predicates that internally call synchronization functions (i.e. waitformultipleobjects) ? Thank a lot for any suggestion. Andrea

2 1

Re: [Boost-users] output to multiple streams
by Eric MALENFANT 27 Nov '06

27 Nov '06

Andrew Schweitzer a écrit: > Is there a standard way to output to multiple streams at the same > time? > > I would like to pass an ostream to a function, write output > strings into that stream, and have them go to both cout and a > file. I'd like something like this: > > void DoSomething(ostream& ros) > { > ros << "This goes should go to cout and to a file" << > endl; } multi_stream ms; fstream f("out.txt"); ms.add(cout); > ms.add(f); DoSomething(ms); > > Any suggestions? > > Is this supported by the iostream library? > tee_device is probably what you're looking for.

2 1

output to multiple streams
by Andrew Schweitzer 27 Nov '06

27 Nov '06

Is there a standard way to output to multiple streams at the same time? I would like to pass an ostream to a function, write output strings into that stream, and have them go to both cout and a file. I'd like something like this: void DoSomething(ostream& ros) { ros << "This goes should go to cout and to a file" << endl; } multi_stream ms; fstream f("out.txt"); ms.add(cout); ms.add(f); DoSomething(ms); Any suggestions? Is this supported by the iostream library? I took a brief look at iostream doc and without really absorbing it, it doesn't seem to directly support this functionality. Maybe I need to read more carefully. Thanks, Andy

2 1

[serialization] - creating own archive?
by Oliver.Kowalke＠qimonda.com 27 Nov '06

27 Nov '06

Hi, Can I get an example (HOWTO, pseudo code etc.) which creates ist own archive which does not require streams (using another basis)? Regards, Oliver

2 1

Boost-Jam - Building Boost.Python extensions
by Lawrence Spector 27 Nov '06

27 Nov '06

Hello all. Quick question on boost-jam, because I couldn't get it work right on my system. When I went into the $BOOST_ROOT_DIR\libs\python\example\tutorial directory and build as follows: bjam -sTOOLS=vc-7_1 It built with no problems. I then took the tutorial example and moved it outside the boost tree. I edited the Jamrules so that: path-global BOOST_ROOT : ../../../.. ; became: path-global BOOST_ROOT : $(BOOST_ROOT_DIR) ; and left all else the same. However when I built, it complained that it couldn't find boost-build.jam. Any ideas what might be missing/not set up right, or if I missed a step? Thanks so much, Lawrence

2 1

Signals
by Sam Duvall 27 Nov '06

27 Nov '06

Hi, I am trying to use boost signals. I am using Visual Studio 2005 with boost and qt. I had to do this workaround to avoid the signals conflict: #ifdef signals #error "signalslib.hpp must be included before any qt header" #endif #include <boost/signal.hpp> namespace boost { namespace signalslib = signals; } I am getting this error INK : fatal error LNK1104: cannot open file 'libboost_signals-vc80-mt-1_33_1.lib' Thanks, Sam

2 1

[multiindex] - lower_bound/upper_bound return wrong results
by Oliver.Kowalke＠qimonda.com 27 Nov '06

27 Nov '06

Hello, The example below should print out only the items {1.0, true} and {2.0, true} but not {1.5, false}. What is going wrong? Regards, Oliver #include <algorithm> #include <iostream> #include <iterator> #include <cstdlib> #include <stdexcept> #include <utility> #include <boost/lambda/lambda.hpp> #include <boost/multi_index_container.hpp> #include <boost/multi_index/key_extractors.hpp> #include <boost/multi_index/ordered_index.hpp> namespace mi = boost::multi_index; namespace ld = boost::lambda; class item { private: double weight_; bool asignable_; public: item( double weight, bool asignable) : weight_( weight), asignable_( asignable) {} double weight() const { return weight_; } bool asignable() const { return asignable_; } }; std::ostream & operator<<( std::ostream & os, item const& i) { os << i.weight() << " " << std::boolalpha << i.asignable(); return os; } int main( int argc, char *argv[]) { try { typedef mi::multi_index_container< item, mi::indexed_by< mi::ordered_unique< mi::composite_key< item, mi::const_mem_fun< item, double, & item::weight >, mi::const_mem_fun< item, bool, & item::asignable > > > > > item_table; item_table s; s.insert( item( 0.1, true) ); s.insert( item( 0.5, true) ); s.insert( item( 1.0, true) ); s.insert( item( 1.5, false) ); s.insert( item( 2.0, true) ); typedef item_table::nth_index< 0 >::type idx_type; idx_type::iterator it0 = s.lower_bound( boost::make_tuple( 0.8, true) ); idx_type::iterator it1 = s.upper_bound( boost::make_tuple( 2.5, true) ); std::copy( it0, it1, std::ostream_iterator< item >( std::cout, "\n") ); /* output: 1 true 1.5 false // wrong! 2 true */ return EXIT_SUCCESS; } catch ( std::exception const& e) { std::cerr << e.what() << std::endl; } catch ( ... ) { std::cerr << "unhandled exception" << std::endl; } return EXIT_FAILURE; }

2 1

Re: [Boost-users] [multiindex] - lower_bound/upper_bound return wrongresults
by Mihalicza, Jozsef 27 Nov '06

27 Nov '06

Hello, Compose_key implements lexicographical comparison where (1, true) < (1.5, false) < (2, true). What you need is a composition of two indices rather than of keys I think, the first filters out elements having proper first keys and the second narrows that by the second key. HTH József Mihalicza -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Oliver.Kowalke(a)qimonda.com Sent: Monday, November 27, 2006 2:41 PM To: boost-users(a)lists.boost.org Subject: [Boost-users] [multiindex] - lower_bound/upper_bound return wrongresults Hello, The example below should print out only the items {1.0, true} and {2.0, true} but not {1.5, false}. What is going wrong? Regards, Oliver #include <algorithm> #include <iostream> #include <iterator> #include <cstdlib> #include <stdexcept> #include <utility> #include <boost/lambda/lambda.hpp> #include <boost/multi_index_container.hpp> #include <boost/multi_index/key_extractors.hpp> #include <boost/multi_index/ordered_index.hpp> namespace mi = boost::multi_index; namespace ld = boost::lambda; class item { private: double weight_; bool asignable_; public: item( double weight, bool asignable) : weight_( weight), asignable_( asignable) {} double weight() const { return weight_; } bool asignable() const { return asignable_; } }; std::ostream & operator<<( std::ostream & os, item const& i) { os << i.weight() << " " << std::boolalpha << i.asignable(); return os; } int main( int argc, char *argv[]) { try { typedef mi::multi_index_container< item, mi::indexed_by< mi::ordered_unique< mi::composite_key< item, mi::const_mem_fun< item, double, & item::weight >, mi::const_mem_fun< item, bool, & item::asignable > > > > > item_table; item_table s; s.insert( item( 0.1, true) ); s.insert( item( 0.5, true) ); s.insert( item( 1.0, true) ); s.insert( item( 1.5, false) ); s.insert( item( 2.0, true) ); typedef item_table::nth_index< 0 >::type idx_type; idx_type::iterator it0 = s.lower_bound( boost::make_tuple( 0.8, true) ); idx_type::iterator it1 = s.upper_bound( boost::make_tuple( 2.5, true) ); std::copy( it0, it1, std::ostream_iterator< item >( std::cout, "\n") ); /* output: 1 true 1.5 false // wrong! 2 true */ return EXIT_SUCCESS; } catch ( std::exception const& e) { std::cerr << e.what() << std::endl; } catch ( ... ) { std::cerr << "unhandled exception" << std::endl; } return EXIT_FAILURE; } _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

1 0

Carrying Boost source code with mine
by Paulo J. Matos 25 Nov '06

25 Nov '06

Hello, I need to use Boost (it would be great and save me a lot of work) in my software. However, I don't want to say to my users that they need to have boost installed. So, what's the best way to distribute boost around with my code? Right now, I only need variant. Should I just copy the include/variant to my include/boost? How do I know why files are needed if these are not just the only ones? Regards, -- Paulo Jorge Matos - pocm at soton.ac.uk http://www.personal.soton.ac.uk/pocm PhD Student @ ECS University of Southampton, UK

2 2

[serialization] char[] and double
by Larry Smith 25 Nov '06

25 Nov '06

We have thousands of 'packed' 'C' structs (2100+) shared between C and C++ modules & apps. These structures do NOT contain any pointers, all data is contiguous so that it may be transferred directly from one machine's memory to another machine's memory without translation (32 bit Windows on Intel), e.g. #ifdef __cplusplus extern "C" { #endif typedef struct NODE_MGR { char ApplName[8]; char CompName[8]; } NODE_MGR; typedef struct ROUTE_CONTROL { UCHAR msg_type; ULONG req_num; char src_domain_id[ 15 ]; char src_machine_id[ 8 ]; char src_proc_id[ 32 ]; char dest_domain_id[ 15 ]; char dest_machine_id[ 8 ]; char dest_proc_id[ 32 ]; NODE_MGR PrimeNodeMgr; NODE_MGR BkupNodeMgr; UINT parmlen; UINT datalen; /* data[] is actually 'parmlen + datalen' bytes * in length (64K max) and contains arrays of * other struct's who's types vary based on the values * of 'msg_type' and 'req_num'. */ char data[ 1 ]; } ROUTE_CONTROL; /* hundreds of other struct defs here... */ #ifdef __cplusplus } #endif Currently, these structs are written directly from the workstation's memory to a TCP/IP socket connected to a remote server process which reads them from the socket directly into memory for immediate use by the server program (i.e. 'packed' binary structs are transfered over the net from one 32 bit Windows machine to another 32 bit Windows machine). In the near future the workstations will continue to be 32 bit Windows, but the servers may be 32 bit Linux on Intel, or 64 bit Linux on AMD, or 64 bit Linux on PowerPC, or 64 bit Solaris on Sparc. This means that we can no longer send/receive 32 bit Intel 'packed' binary structs directly from the workstation to the server. I had hoped to use Boost Archives to serialize the structs to a std::string (via std::strstream), send it across the net, then deserialize the structs at the server. However, the structs have thousands of members of the form 'char[N]' representing char arrays which are NOT nul-terminated. I can not get these struct members to serialize; I get compile errors, e.g. this fails to compile: ar & fld; // where fld is: char[200] What's the secret trick? The structs also contain many 'double' fields. If the precision is the (default?) 6 when serialized, that won't be enough. Is there a way to control the precision of doubles when they are written to a text archive? Thanks, Larry

4 7

Re: [Boost-users] debugging templates
by Sohail Somani 25 Nov '06

25 Nov '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Maik Beckmann > Sent: Friday, November 24, 2006 10:27 AM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] debugging templates > > Am Freitag, den 24.11.2006, 10:32 +0100 schrieb Berenguer Blasi: > > Thank you David, > > > > I think it?s a Kdbg issue (though I thought I would use gdb > behind the > > scenes)... > > > > Anybody knows something like Kgdb WITH templates? > > > > Thanks > > > > What about DDD ? > http://www.gnu.org/software/ddd/ > > I'm not an expert, but its the best(most bug free) GDB > front-end I know. cgdb is also a good one http://cgdb.sf.net

2 1

[install] need to install 32 bit boost libraries on amd64 system
by Brian Budge 24 Nov '06

24 Nov '06

Hi all - Is it possible to build 32 bit boost libraries on amd64? When I try, I get complaints (errors) saying that pointers aren't the right size. I already have boost installed in /usr/lib64, but I need the 32 bit libs in /usr/lib32. I'm running the gentoo distribution, so a trick to build via emerge or a trick to build via tarball/configure would be great. Thanks for any help, Brian

2 1

Wrapping variant into a smart reference
by Mathias Gaunard 24 Nov '06

24 Nov '06

I would have liked to wrap boost.variant<Base, Derived1, Derived2 .. DerivedN> into a smart reference that would act like a reference to Base. Unfortunetely, the variadic template nature makes this extremely complicated, especially since there are a lot of conversions cases to handle too (<Base, Derived1..DerivedN> should be convertible to <BaseOfBase, Base, Derived1..DerivedN>). Is there any way to code that kind of thing easily?

1 0

Re: [Boost-users] debugging templates
by Hughes, James 24 Nov '06

24 Nov '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Berenguer Blasi > Sent: 23 November 2006 09:44 > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] debugging templates > > Hi, > > I guess the subject says it all. > > Is there a way to debug templates? with kdbg preferrably? Kgdb??? The Linux kernel debugger?? Since the kernel is all C, how can you use templates in it? Forgive me if I am missing something!! I have certainly done some debugging using _gdb_ on templated code, but it can be somewhat confusing (rather like template compile errors!), but certainly possible. James > > I've read you can with dbx but don?t know if you can with others. > > How do you do it? > > Thanks. > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately.

5 6

boost thread exmple
by Fred J. 24 Nov '06

24 Nov '06

Hi the code below compiles and runs, but does not do what I want. how can I get the code below to print out: "I am child 1sub thread called." thanks ****************************************************************** #include <boost/thread/thread.hpp> #include <string> #include <iostream> using namespace std; class Child { string c; public: Child(string x):c(x){ } void operator()(){ cout << c << " sub thread called." << endl; } }; class Parent { string p; public: Parent(string x):p(x){} void operator()(){ cout << p << "thread called." << endl; Child c1("I am child 1"); boost::thread c1t(c1); } }; int main(){ Parent p1("I am parent 1: "); boost::thread p1t(p1); } --------------------------------- Everyone is raving about the all-new Yahoo! Mail beta.

4 4

bind a boost::fusion::at_key
by Pierre viallet 24 Nov '06

24 Nov '06

Hi, I'm trying to bind boost::fusion::at_key, but i do not understand why the following piece of code do not compile : struct tag { class a; class b; class c; }; typedef boost::fusion::map< bf::pair<tag::a, size_t> , bf::pair<tag::b, size_t> , bf::pair<tag::c, size_t> > TMyFusionMap; TMyFusionMap aFusionMap(7,8,9); std::cout << boost::fusion::at_key<tag::b>(aFusionMap) << std::endl; //work std::cout << boost::bind(&boost::fusion::at_key<tag::b>, _1)(aFusionMap) << std::endl; //do not compile on msvc 8.0 std::cout << boost::bind<size_t &>(&boost::fusion::at_key<tag::b>, _1)(aFusionMap) << std::endl; //do not compile on msvc 8.0 any idear ? ___________________________________________________________________________ Découvrez une nouvelle façon d'obtenir des réponses à toutes vos questions ! Profitez des connaissances, des opinions et des expériences des internautes sur Yahoo! Questions/Réponses http://fr.answers.yahoo.com

1 0

[MultiIndex] VC8: spurious compiler error
by Markus Werle 24 Nov '06

24 Nov '06

Hi! I am out of ideas here, but somebody probably fell into that trap before. Since the error message points to unrelated code, I hope to get some idea via Boost: boost_1_33_1\boost/multi_index/ordered_index.hpp(445) : error C2143: syntax error : missing ',' before '.' Since I had VC8 messing things up before I bet it is the #include order again, but I could not find the offending header yet. Markus

3 4

Iterate over all matching items with hashed_non_unique
by Joseph Turian 24 Nov '06

24 Nov '06

I have a boost_multi_index with a hashed_non_unique key. I understand that if I do a .find() for a particular key, I can get a single entry with that key. However, I want to iterate over *ALL* the entries with this particular key, since there may be several. How do I do this? I can't figure out which is the correct end iterator. e.g. something along the following lines [haven't tried to compile] typedef FirstName string; typedef multi_index_container< Employee, indexed_by< hashed_non_unique<member<tag<FirstName>, Employee,FirstName,&Employee::first_name> > > > employee_set; typedef employee_set::index<FirstName>::type example_set_by_movie; boost::multi_index::get<FirstName>(m_employees).find("john"); -- http://www.cs.nyu.edu/~turian/

2 2

[serialization] Difficulties with shared_ptr and export.hpp
by Deane Yang 24 Nov '06

24 Nov '06

First, I am trying to figure out how to use BOOST_CLASS_EXPORT. I am trying to do it using the following advice from the documentation: "As noted in the comments, this would work. But #include <.../export.hpp> can't be used without conflicting with other modules which use #include <.../*archive.hpp>. In this case we can move the export to an implementation file: // A.cpp #include "A.hpp" ... // export.hpp header should be last; #include <boost/serialization/export.hpp> ... BOOST_CLASS_EXPORT(A) ..." In fact, my implementation file contains *only* BOOST_CLASS_EXPORT statements. Code like this seems to compile only if I also include archive headers like: #include <boost/archive/xml_oarchive.hpp> #include <boost/archive/xml_iarchive.hpp> If these directives are omitted, then my code does not compile. Is this correct? (I didn't see anything about this in the documentation) But now if a class that is being exported contains a boost::shared_ptr<..> member (so I have to #include boost/serialization/shared_ptr.hpp), then I get the following compilation errors (in MSVC8.0express): ..\..\..\vendor\boost\boost/serialization/shared_ptr.hpp(134) : error C2039: 'reset' : is not a member of 'boost::archive::naked_xml_iarchive' ..\..\..\vendor\boost\boost/archive/xml_iarchive.hpp(91) : see declaration of 'boost::archive::naked_xml_iarchive' ..\..\..\vendor\boost\boost/serialization/split_free.hpp(58) : see reference to function template instantiation 'void boost::serialization::load<Archive,AndrewKalotayAssociates::Basic::Output::ValuationReport>(Archive &,boost::shared_ptr<T> &,const unsigned int)' being compiled Can someone tell from this what I'm doing wrong?

2 6

building errors, ( shared_ptr.hpp:253: undefined reference to `AcceptEx@32' )
by sfinks 23 Nov '06

23 Nov '06

Hi. I'm trying to build libtorrent ( http://libtorrent.sf.net ) on xp+mingw+msys and I get some errors regarding boost. Hopefully someone can help.. Sorry if its not much of a boost problem.... I've attached compiler output text as as .txt file... ~/E/libtorrent-0.11 $ make make all-recursive make[1]: Entering directory `/home/devel/E/libtorrent-0.11' Making all in include make[2]: Entering directory `/home/devel/E/libtorrent-0.11/include' make[2]: Nothing to be done for `all'. make[2]: Leaving directory `/home/devel/E/libtorrent-0.11/include' Making all in zlib make[2]: Entering directory `/home/devel/E/libtorrent-0.11/zlib' make[2]: Nothing to be done for `all'. make[2]: Leaving directory `/home/devel/E/libtorrent-0.11/zlib' Making all in src make[2]: Entering directory `/home/devel/E/libtorrent-0.11/src' make[2]: Nothing to be done for `all'. make[2]: Leaving directory `/home/devel/E/libtorrent-0.11/src' Making all in test make[2]: Entering directory `/home/devel/E/libtorrent-0.11/test' /bin/sh ../libtool --tag=CXX --mode=link g++ -ftemplate-depth-50 -I../include -I../include/libtorrent -g -g -O2 -lboost_date_time -lboost_filesystem -lboost_thread -L/boost/lib -o test_piece_picker.exe main.o test_piece_picker.o ../src/libtorrent.la -lws2_32 g++ -ftemplate-depth-50 -I../include -I../include/libtorrent -g -g -O2 -o test_piece_picker.exe main.o test_piece_picker.o -L/boost/lib ../src/.libs/libtorrent.a -lboost_date_time -lboost_filesystem -lboost_thread -lws2_32 ../src/.libs/libtorrent.a(session_impl.o)(.text$_ZN4asio6detail23win_iocp_socket_serviceINS_2ip3tcpEE12async_acceptINS_12basic_socketIS3_NS_21stream_socket_serviceIS3_EEEEN5boost3_bi6bind_tIvNSA_4_mfi3mf3IvN10libtorrent3aux12session_implERKNSA_10shared_ptrINS_19basic_stream_socketIS3_S8_EEEERKNSA_8weak_ptrINS_21basic_socket_acceptorIS3_NS_23socket_acceptor_serviceIS3_EEEEEERKNS_5errorEEENSB_5list4INSB_5valueIPSH_EENS11_ISL_EENS11_IST_EENSA_3argILi1EEEEEEEEEvRNS4_19implementation_typeERT_T0_[void asio::detail::win_iocp_socket_service<asio::ip::tcp>::async_accept<asio::basic_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> >, boost::_bi::bind_t<void, boost::_mfi::mf3<void, libtorrent::aux::session_impl, boost::shared_ptr<asio::basic_stream_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> > > const&, boost::weak_ptr<asio::basic_socket_acceptor<asio::ip::tcp, asio::socket_acceptor_service<asio::ip::tcp> > > const&, asio::error const&>, boost::_bi::list4<boost::_bi::value<libtorrent::aux::session_impl*>, boost::_bi::value<boost::shared_ptr<asio::basic_stream_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> > > >, boost::_bi::value<boost::weak_ptr<asio::basic_socket_acceptor<asio::ip::tcp, asio::socket_acceptor_service<asio::ip::tcp> > > >, boost::arg<1> > > >(asio::detail::win_iocp_socket_service<asio::ip::tcp>::implementation_type&, asio::basic_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> >&, boost::_bi::bind_t<void, boost::_mfi::mf3<void, libtorrent::aux::session_impl, boost::shared_ptr<asio::basic_stream_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> > > const&, boost::weak_ptr<asio::basic_socket_acceptor<asio::ip::tcp, asio::socket_acceptor_service<asio::ip::tcp> > > const&, asio::error const&>, boost::_bi::list4<boost::_bi::value<libtorrent::aux::session_impl*>, boost::_bi::value<boost::shared_ptr<asio::basic_stream_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> > > >, boost::_bi::value<boost::weak_ptr<asio::basic_socket_acceptor<asio::ip::tcp, asio::socket_acceptor_service<asio::ip::tcp> > > >, boost::arg<1> > >)]+0x5a6): In function `ZN10libtorrent3aux12checker_impl12find_torrentERKNS_10big_numberE': E:/mingw/msys/1.0/boost/include/boost-1_33_1/boost/shared_ptr.hpp:253: undefined reference to `AcceptEx@32' ../src/.libs/libtorrent.a(session_impl.o)(.text$_ZN4asio6detail23win_iocp_socket_serviceINS_2ip3tcpEE16accept_operationINS_12basic_socketIS3_NS_21stream_socket_serviceIS3_EEEEN5boost3_bi6bind_tIvNSA_4_mfi3mf3IvN10libtorrent3aux12session_implERKNSA_10shared_ptrINS_19basic_stream_socketIS3_S8_EEEERKNSA_8weak_ptrINS_21basic_socket_acceptorIS3_NS_23socket_acceptor_serviceIS3_EEEEEERKNS_5errorEEENSB_5list4INSB_5valueIPSH_EENS11_ISL_EENS11_IST_EENSA_3argILi1EEEEEEEE18do_completion_implEPNS0_18win_iocp_operationEmj[asio::detail::win_iocp_socket_service<asio::ip::tcp>::accept_operation<asio::basic_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> >, boost::_bi::bind_t<void, boost::_mfi::mf3<void, libtorrent::aux::session_impl, boost::shared_ptr<asio::basic_stream_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> > > const&, boost::weak_ptr<asio::basic_socket_acceptor<asio::ip::tcp, asio::socket_acceptor_service<asio::ip::tcp> > > const&, asio::error const&>, boost::_bi::list4<boost::_bi::value<libtorrent::aux::session_impl*>, boost::_bi::value<boost::shared_ptr<asio::basic_stream_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> > > >, boost::_bi::value<boost::weak_ptr<asio::basic_socket_acceptor<asio::ip::tcp, asio::socket_acceptor_service<asio::ip::tcp> > > >, boost::arg<1> > > >::do_completion_impl(asio::detail::win_iocp_operation*, unsigned long, unsigned int)]+0x549): In function `ZN10libtorrent3aux12checker_impl12find_torrentERKNS_10big_numberE': E:/mingw/msys/1.0/home/devel/E/libtorrent-0.11/src/session_impl.cpp:403: undefined reference to `GetAcceptExSockaddrs@32' ../src/.libs/libtorrent.a(session_impl.o)(.text$_ZN4asio6detail23win_iocp_socket_serviceINS_2ip3tcpEE16accept_operationINS_12basic_socketIS3_NS_21stream_socket_serviceIS3_EEEEN5boost3_bi6bind_tIvNSA_4_mfi3mf3IvN10libtorrent3aux12session_implERKNSA_10shared_ptrINS_19basic_stream_socketIS3_S8_EEEERKNSA_8weak_ptrINS_21basic_socket_acceptorIS3_NS_23socket_acceptor_serviceIS3_EEEEEERKNS_5errorEEENSB_5list4INSB_5valueIPSH_EENS11_ISL_EENS11_IST_EENSA_3argILi1EEEEEEEE18do_completion_implEPNS0_18win_iocp_operationEmj[asio::detail::win_iocp_socket_service<asio::ip::tcp>::accept_operation<asio::basic_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> >, boost::_bi::bind_t<void, boost::_mfi::mf3<void, libtorrent::aux::session_impl, boost::shared_ptr<asio::basic_stream_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> > > const&, boost::weak_ptr<asio::basic_socket_acceptor<asio::ip::tcp, asio::socket_acceptor_service<asio::ip::tcp> > > const&, asio::error const&>, boost::_bi::list4<boost::_bi::value<libtorrent::aux::session_impl*>, boost::_bi::value<boost::shared_ptr<asio::basic_stream_socket<asio::ip::tcp, asio::stream_socket_service<asio::ip::tcp> > > >, boost::_bi::value<boost::weak_ptr<asio::basic_socket_acceptor<asio::ip::tcp, asio::socket_acceptor_service<asio::ip::tcp> > > >, boost::arg<1> > > >::do_completion_impl(asio::detail::win_iocp_operation*, unsigned long, unsigned int)]+0xa6e): In function `ZN10libtorrent3aux12session_impl9pop_alertEv': E:/mingw/msys/1.0/home/devel/E/libtorrent-0.11/src/session_impl.cpp:1579: undefined reference to `AcceptEx@32' collect2: ld returned 1 exit status make[2]: *** [test_piece_picker.exe] Error 1 make[2]: Leaving directory `/home/devel/E/libtorrent-0.11/test' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/devel/E/libtorrent-0.11' make: *** [all] Error 2 ~/E/libtorrent-0.11 $ ls -l /opt/lib/ total 280094 -rw-r--r-- 1 devel Administ 105551252 Nov 22 17:45 libtorrent.a -rw-r--r-- 1 devel Administ 817 Nov 22 17:45 libtorrent.la -rw-r--r-- 1 devel Administ 79398984 Nov 21 16:37 libwx_based-2.6.a -rw-r--r-- 1 devel Administ 12517024 Nov 21 16:37 libwx_based_net-2.6.a -rw-r--r-- 1 devel Administ 2046608 Nov 21 16:37 libwx_based_xml-2.6.a -rw-r--r-- 1 devel Administ 22094294 Nov 21 16:37 libwx_mswd_adv-2.6.a -rw-r--r-- 1 devel Administ 246483262 Nov 21 16:37 libwx_mswd_core-2.6.a -rw-r--r-- 1 devel Administ 28995300 Nov 21 16:37 libwx_mswd_html-2.6.a -rw-r--r-- 1 devel Administ 3661674 Nov 21 16:37 libwx_mswd_media-2.6.a -rw-r--r-- 1 devel Administ 2703630 Nov 21 16:37 libwx_mswd_qa-2.6.a -rw-r--r-- 1 devel Administ 53627348 Nov 21 16:37 libwx_mswd_xrc-2.6.a -rw-r--r-- 1 devel Administ 370560 Nov 21 16:37 libwxexpatd-2.6.a -rw-r--r-- 1 devel Administ 1252132 Nov 21 16:37 libwxjpegd-2.6.a -rw-r--r-- 1 devel Administ 647620 Nov 21 16:37 libwxpngd-2.6.a -rw-r--r-- 1 devel Administ 271688 Nov 21 16:37 libwxregexd-2.6.a -rw-r--r-- 1 devel Administ 13801246 Nov 21 16:37 libwxtiffd-2.6.a -rw-r--r-- 1 devel Administ 199692 Nov 21 16:37 libwxzlibd-2.6.a drwxr-xr-x 4 devel Administ 0 Nov 21 16:37 wx

3 2

[mpl::map] pregeneration of long types map (150 types)
by Ovanes Markarian 23 Nov '06

23 Nov '06

Hello Alexey, using the C++ preprocessor macro to generate map of 150 types works fine and code which uses the new mapN type compiles and runs fine as well. Just as you described it in the post: http://lists.boost.org/boost-users/2006/11/23321.php We have successfully tested it with 115 elements. Then we tried to switch to the second approach with pregenerated types. The problem we face is that the python script generates empty headers. To avoid all errors we just copied <boost_root>\boost\mpl\map\map50.hpp to <boost_root>\boost\mpl\map\map60.hpp and changed the file accordingly. Here the modified source: // // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // // See http://www.boost.org/libs/mpl for documentation. // $Source: /cvsroot/boost/boost/boost/mpl/map/map50.hpp,v $ // $Date: 2004/09/02 15:40:59 $ // $Revision: 1.2 $ #if !defined(BOOST_MPL_PREPROCESSING_MODE) # include <boost/mpl/map/map50.hpp> #endif #include <boost/mpl/aux_/config/use_preprocessed.hpp> #if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \ && !defined(BOOST_MPL_PREPROCESSING_MODE) # define BOOST_MPL_PREPROCESSED_HEADER map60.hpp # include <boost/mpl/map/aux_/include_preprocessed.hpp> #else # include <boost/preprocessor/iterate.hpp> namespace boost { namespace mpl { # define BOOST_PP_ITERATION_PARAMS_1 \ (3,(51, 60, <boost/mpl/map/aux_/numbered.hpp>)) # include BOOST_PP_ITERATE() }} #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #endif // BOOST_MPL_MAP_MAP60_HPP_INCLUDED Afterwards we did the same with the CPP file in <boost_root>\libs\mpl\preprocessed\map\: // Copyright Aleksey Gurtovoy 2003-4004 // // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // // See http://www.boost.org/libs/mpl for documentation. // $Source: /cvsroot/boost/boost/libs/mpl/preprocessed/map/map50.cpp,v $ // $Date: 2004/09/05 09:45:17 $ // $Revision: 1.3 $ #define BOOST_MPL_PREPROCESSING_MODE #include <boost/config.hpp> #include <boost/mpl/map/map60.hpp> gcc is installed and is registered in the PATH variable. OS Win XP, GCC version: gcc (GCC) 3.4.4 (cygming special) (gdc 0.12, using dmd 0.125) Copyright (C) 2004 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Calling the python script command like: $prompt>python ./preprocess_map.py all E:/global_libs/boost_1_33_1 map60.cpp Produces the output: E:\global_libs\boost_1_33_1\libs\mpl\preprocessed>gcc -E -C -P -IE:/global_libs/ boost_1_33_1 "-D BOOST_USER_CONFIG=<E:/global_libs/boost_1_33_1/libs/mpl/preproc essed/include/plain/user.hpp>" -D BOOST_MPL_CFG_NO_OWN_PP_PRIMITIVES E:\global_l ibs\boost_1_33_1\libs\mpl\preprocessed\map\map60.cpp 1>E:\global_libs\boost_1_3 3_1\libs\mpl\preprocessed\map\map60.hpp E:\global_libs\boost_1_33_1\libs\mpl\preprocessed>gcc -E -C -P -IE:/global_libs/ boost_1_33_1 "-D BOOST_USER_CONFIG=<E:/global_libs/boost_1_33_1/libs/mpl/preproc essed/include/typeof_based/user.hpp>" -D BOOST_MPL_CFG_NO_OWN_PP_PRIMITIVES E:\g lobal_libs\boost_1_33_1\libs\mpl\preprocessed\map\map60.cpp 1>E:\global_libs\bo ost_1_33_1\libs\mpl\preprocessed\map\map60.hpp E:\global_libs\boost_1_33_1\libs\mpl\preprocessed>gcc -E -C -P -IE:/global_libs/ boost_1_33_1 "-D BOOST_USER_CONFIG=<E:/global_libs/boost_1_33_1/libs/mpl/preproc essed/include/no_ctps/user.hpp>" -D BOOST_MPL_CFG_NO_OWN_PP_PRIMITIVES E:\global _libs\boost_1_33_1\libs\mpl\preprocessed\map\map60.cpp 1>E:\global_libs\boost_1 _33_1\libs\mpl\preprocessed\map\map60.hpp But the resulting files in pregenerated directories have the size 0. Doing the same thing by passing map50.cpp works just fine and pregenerates new files. Is there smth, that I miss? With Kind Regards, Ovanes Markarian

2 1

[serialization] Trouble serializing a bitfield
by Ken Roser 23 Nov '06

23 Nov '06

Following is a very short program to test serialization along with the g++ output when compiling it. My problem arises when I try to write a serialization function for a bitfield. As the compiler output shows, the bitfield is the cause of this problem. How should one serialize a bitfield? Have I made some mistake in this code? I can get seriailziation to work if I instead use a save() and load() function that copies each bit to an int before archiving but I'm unsure if this is the best way. #include <stdlib.h> #include <string> #include <iostream> #include <sstream> #include <boost/archive/archive_exception.hpp> #include <boost/archive/binary_iarchive.hpp> #include <boost/archive/binary_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/serialization/export.hpp> #include <boost/serialization/serialization.hpp> #include <boost/serialization/list.hpp> class Event { friend class boost::serialization::access; template<class Archive> void serialize(Archive &ar, const int version) { ar & bits; ar & field1; }; public: struct s { friend class boost::serialization::access; template<class Archive> void serialize(Archive &ar, const int version) { ar & spare1; }; int spare1 : 1; } bits; int field1; }; main(int argc, char **argv) { Event *evt = new Event; evt->field1 = 0x1234; std::stringstream ofs; boost::archive::binary_oarchive oa(ofs); oa & *evt; // serialize the event } serial2.cpp: In member function 'void Event::s::serialize(Archive&, int) [with Archive = boost::archive::binary_oarchive]': boost/serialization/access.hpp:109: instantiated from 'static void boost::serialization::access::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::binary_oarchive, T = Event::s]' boost/serialization/serialization.hpp:81: instantiated from 'void boost::serialization::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::binary_oarchive, T = Event::s]' boost/serialization/serialization.hpp:140: instantiated from 'void boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with Archive = boost::archive::binary_oarchive, T = Event::s]' boost/archive/detail/oserializer.hpp:147: instantiated from 'void boost::archive::detail::oserializer<Archive, T>::save_object_data(boost::archive::detail::basic_oarchive&, const void*) const [with Archive = boost::archive::binary_oarchive, T = Event::s]' serial2.cpp:43: instantiated from here serial2.cpp:29: error: cannot bind bitfield '((Event::s*)this)->Event::s::spare1' to 'int&'

3 3

program_options inconsistent dll linkage
by Elsbeth 23 Nov '06

23 Nov '06

Hi We were having problems while linking boost program_options dynamically in Visual Studio.NET Linking to lib file: boost_program_options-vc71-mt-gd-1_33.lib d:\Develop\SDK and Libraries\boost_1_33_0\boost\program_options\variables_map.hpp(130) : warning C4273: 'boost::program_options::store' : inconsistent dll linkage d:\Develop\SDK and Libraries\boost_1_33_0\boost\program_options\variables_map.hpp(138) : warning C4273: 'boost::program_options::store' : inconsistent dll linkage Problem is that in file variables_map.hpp 'BOOST_PROGRAM_OPTIONS_DECL ' is missing in friend declaration of function 'store'. so: ======================= class BOOST_PROGRAM_OPTIONS_DECL variables_map : public abstract_variables_map, public std::map<std::string, variable_value> { ... friend void store(...); }; ... BOOST_PROGRAM_OPTIONS_DECL void store(...); ======================= should be: ======================= class BOOST_PROGRAM_OPTIONS_DECL variables_map : public abstract_variables_map, public std::map<std::string, variable_value> { ... friend void BOOST_PROGRAM_OPTIONS_DECL store(...); }; ... BOOST_PROGRAM_OPTIONS_DECL void store(...); =======================

2 1

Re: [Boost-users] debugging templates
by Hughes, James 23 Nov '06

23 Nov '06

> > Berenguer Blasi wrote: > > > > Is there a way to debug templates? with kdbg preferrably? > > What's your specific problem in debugging template code? > Certainly you could debug templated C++ code with any gdb > frontend. As James already said, this could get rather > confusing, but it's possible without a doubt. > > > > James Hughes wrote: > > Kgdb??? The Linux kernel debugger?? Since the kernel is all > C, how can > > you > use templates > in it? > > > > Forgive me if I am missing something!! > > I think he means the KDE frontend to gdb, usually embedded > into KDevelop. Ah, OK. Too many TLA's... As an aside, I use the Eclipse IDE, with the CDT, and that has a good enough front end for GDB to debug most stuff. Latest version is much better than the one from a year back or so. > > Regards > Hendrik > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately.

1 0

Combining static and dynamic policies
by Jens Müller 23 Nov '06

23 Nov '06

Hi, I have the following task: There is an algorithm where you can set different behaviors for creating a BFS tree. Currently this is done by setting a policy object (dynamic), a function of which is called to perform the search. I'd like to use static policies here (as is done in generic Boost algorithms), but still keep the possibility of setting the behavior manually. The reason for this is: You can set the behavior using a command line parameter, and it would be impractical to instantiate all templates and then use a huge switch (think of combinations of several policies) to choose the appropriate instantiation. Here a wrapper (dynamic polymorphism) would be needed anyway, or any code using the algorithm would need to be duplicated as well. So my idea is as follows: There is a template parameter for a policy class. Static policy exist for each possible behavior, as well for a dynamic behavior. The "dynamic" policy class has virtual member functions and there exists an inheriting dynamic class for each behavior.[1] The algorithm then has a named param for the policy class. Default value if to default-construct an object of the policy class. (If useful, the template might have a default value for the policy template parameter as well, so the user needn't do anything). Has someone already taken this or a similiar approach? If so, could you point me to a reference? What do you think of the approach? Greeting, Jens [1] Hmmm ... Could this inheriting class be used as template parameter without overhead? Other solution would be: class dyn_behavior{ public: virtual void perform_search(something ...) = 0; } class specific_dyn_behavior<class T> : dyn_behavior { T behavior; public: void perform_search(something ...){ behavior.perform_search(something ...); } }

1 0

shared_ptr. circular references
by bringiton bringiton 23 Nov '06

23 Nov '06

Can anyone offer advice on detecting circular references with shared_ptrs. I have a large app, 50+ classes, and most objects are managed with shared_ptrs. No consideration has gone into avoid circular references, so I'm sure there will be a few in there. I thinking that looking though all the classes and their attributes will take a while. Any suggestions/advice in finding circular references (so i can use weak_ptrs)? I was thinking of maybe getting a tool that draws the class diagram. Or having a base class for all my classes that reference count to a global variable to detect the number of leaks. It seems the shared_ptr is a good idea for memory management, but it opens up the original problem of memory leaks...

4 3

[serialization] linking
by Deane Yang 23 Nov '06

23 Nov '06

I am using bjam with Boost Build v2 to compile and link an executable that calls the boost serialization library using MSVC++ 8.0. For some reason, it tries to link to a library named "libboost..." but the actual library is called "boost...." (no "lib" prefix). Why is this happening and how do I fix it? It doesn't happen when I compile the same executable in Linux.

5 11

[BGL] working file_dependencies.cpp
by Alexander Holler 22 Nov '06

22 Nov '06

Hello, I've already though some time that something does not work as expected using the way the various file_dependencies.cpp examples have done for calculating what files could be compiled in parallel. Because I've now got to a point where I really need something working, I've just done it myself. ;) My solution is pretty simple, and it basically works like it is described in the documentation for the example, walk through the tree and calculate the maximum distance. To achieve that, I'm just using the result from topological_sort and calculating the maximum through a walk through the in_edges of the vertices. Because a diff is almost as large as the resulting example, I've just attached the modified example. It might not look as nice as the original example, but it works as expected. ;) Kind regards, Alexander Holler //======================================================================= // Copyright 1997, 1998, 1999, 2000 University of Notre Dame. // Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek // // Distributed under the Boost Software License, Version 1.0. (See // accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) //======================================================================= // Some small modifications are done by Alexander Holler /* Paul Moore's request: As an example of a practical problem which is not restricted to graph "experts", consider file dependencies. It's basically graph construction, plus topological sort, but it might make a nice "tutorial" example. Build a dependency graph of files, then use the algorithms to do things like 1. Produce a full recompilation order (topological sort, by modified date) 2. Produce a "parallel" recompilation order (same as above, but group files which can be built in parallel) 3. Change analysis (if I change file x, which others need recompiling) 4. Dependency changes (if I add a dependency between file x and file y, what are the effects) */ #include <boost/config.hpp> // put this first to suppress some VC++ warnings #include <iostream> #include <iterator> #include <algorithm> #include <time.h> #include <boost/utility.hpp> #include <boost/graph/adjacency_list.hpp> #include <boost/graph/topological_sort.hpp> #include <boost/graph/depth_first_search.hpp> #include <boost/graph/dijkstra_shortest_paths.hpp> #include <boost/graph/visitors.hpp> using namespace std; using namespace boost; enum files_e { dax_h, yow_h, boz_h, zow_h, foo_cpp, foo_o, bar_cpp, bar_o, libfoobar_a, zig_cpp, zig_o, zag_cpp, zag_o, libzigzag_a, killerapp, N }; const char* name[] = { "dax.h", "yow.h", "boz.h", "zow.h", "foo.cpp", "foo.o", "bar.cpp", "bar.o", "libfoobar.a", "zig.cpp", "zig.o", "zag.cpp", "zag.o", "libzigzag.a", "killerapp" }; struct print_visitor : public bfs_visitor<> { template <class Vertex, class Graph> void discover_vertex(Vertex v, Graph&) { cout << name[v] << " "; } }; struct cycle_detector : public dfs_visitor<> { cycle_detector(bool& has_cycle) : m_has_cycle(has_cycle) { } template <class Edge, class Graph> void back_edge(Edge, Graph&) { m_has_cycle = true; } protected: bool& m_has_cycle; }; int main(int,char*[]) { typedef pair<int,int> Edge; Edge used_by[] = { Edge(dax_h, foo_cpp), Edge(dax_h, bar_cpp), Edge(dax_h, yow_h), Edge(yow_h, bar_cpp), Edge(yow_h, zag_cpp), Edge(boz_h, bar_cpp), Edge(boz_h, zig_cpp), Edge(boz_h, zag_cpp), Edge(zow_h, foo_cpp), Edge(foo_cpp, foo_o), Edge(foo_o, libfoobar_a), Edge(bar_cpp, bar_o), Edge(bar_o, libfoobar_a), Edge(libfoobar_a, libzigzag_a), Edge(zig_cpp, zig_o), Edge(zig_o, libzigzag_a), Edge(zag_cpp, zag_o), Edge(zag_o, libzigzag_a), Edge(libzigzag_a, killerapp) }; const std::size_t nedges = sizeof(used_by)/sizeof(Edge); typedef adjacency_list<vecS, vecS, bidirectionalS, property<vertex_distance_t, int> > Graph; #if defined(BOOST_MSVC) && BOOST_MSVC <= 1300 // VC++ can't handle the iterator constructor Graph g(N); for (std::size_t j = 0; j < nedges; ++j) { graph_traits<Graph>::edge_descriptor e; bool inserted; tie(e, inserted) = add_edge(used_by[j].first, used_by[j].second, g); } #else Graph g(used_by, used_by + nedges, N); #endif typedef graph_traits<Graph>::vertex_descriptor Vertex; // Determine ordering for a full recompilation // and the order with files that can be compiled in parallel { typedef list<Vertex> MakeOrder; MakeOrder make_order; property_map<Graph, vertex_distance_t>::type distance = get(vertex_distance, g); topological_sort(g, std::front_inserter(make_order)); cout << "make ordering: "; for (MakeOrder::iterator i = make_order.begin(); i != make_order.end(); ++i) { cout << name[*i] << " "; // Walk through the in_edges an calculate the maximum distance. Graph::in_edge_iterator j, j_end; tie(j, j_end) = in_edges(*i, g); if(j==j_end) distance[*i]=0; else { int maxdist=0; // Through the order from topological sort, we are sure that every // distance we are using here is already initialized. for (; j != j_end; ++j) maxdist=std::max(distance[source(*j, g)], maxdist); distance[*i]=maxdist+1; } } cout << endl << endl; cout << "parallel make ordering, " << endl << "vertices with same group number can be made in parallel" << endl; graph_traits<Graph>::vertex_iterator i, iend; for (tie(i,iend) = vertices(g); i != iend; ++i) cout << "time_slot[" << name[*i] << "] = " << distance[*i] << endl; } cout << endl; // if I change yow.h what files need to be re-made? { cout << "A change to yow.h will cause what to be re-made?" << endl; print_visitor vis; breadth_first_search(g, vertex(yow_h, g), visitor(vis)); cout << endl; } cout << endl; // are there any cycles in the graph? { bool has_cycle = false; cycle_detector vis(has_cycle); depth_first_search(g, visitor(vis)); cout << "The graph has a cycle? " << has_cycle << endl; } cout << endl; // add a dependency going from bar.cpp to dax.h { cout << "adding edge bar_cpp -> dax_h" << endl; add_edge(bar_cpp, dax_h, g); } cout << endl; // are there any cycles in the graph? { bool has_cycle = false; cycle_detector vis(has_cycle); depth_first_search(g, visitor(vis)); cout << "The graph has a cycle now? " << has_cycle << endl; } return 0; }

2 2

[enable_if] Compiler workaround for constructor overloads
by Michael Marcin 22 Nov '06

22 Nov '06

Hello I'm working with a Codewarrior compiler (Nokia Codewarrior C/C++ Compiler for Windows/x86 version 3.2.3 build 451). The following test code finds the proper overload for MSVC 2005 and doesn't for the Codewarrior compiler but only with the = syntax. Does anyone have any idea how to make "c" find its overload as well? It would make the client code a lot cleaner to read/write. #include <boost/type_traits/is_integral.hpp> #include <boost/utility/enable_if.hpp> struct tester { int value; tester( float f ) : value((int)f) { } tester( double d ) : value((int)d) { } template< typename T > tester( T val, typename boost::enable_if< boost::is_integral<T> >::type* = 0 ) : value(val) { zzz } }; void main() { tester a = 1.f; // works (chooses float overload) tester b(1); // works (i.e. error on zzz) tester c = 1; // works on vc2005 (i.e. error on zzz) // fails on cw (ambiguous overload looking at float and double) }

1 0

wave - can line markers be suppressed?
by Grant, Joan 22 Nov '06

22 Nov '06

Using the wave library is there any way to suppress line markers (#line...) in a manner similar to the '-P' option of the gcc compiler's preprocessor? Thanks, Joan The information contained in or attached to this email may be subject to the Export Administration Regulations (EAR), administered by the U.S. Department of Commerce, or the International Traffic in Arms Regulations (ITAR), administered by the U.S. Department of State, and may require an export license from the Commerce or State Department prior to its export. An export can include a release or disclosure to a foreign national inside or outside the United States. Include this notice with any reproduced portion of this information.

2 2

Another generic program that won't compile with pointee, bind, and array
by Terry G 22 Nov '06

22 Nov '06

Here's another (simplified) program I can't get to work. I'm trying to write a generic routine that finds the largest element of a sequence. It is assumed that element->size() is defined, as it is for boost::array and std::string. For some reason, the Largest template function works okay for std::strings, but not for boost::arrays. Can you tell me what is wrong? Will you please offer some improvements for error detection and debugging techniques that would have helped here? Perhaps I need a "typename" or "template" somewhere. Take it as given that I have a String class that needs to be a fixed-size array. Here's the code: #include <boost/operators.hpp> #include <boost/static_assert.hpp> #include <boost/function.hpp> #include <boost/tuple/tuple.hpp> #include <boost/iterator/iterator_traits.hpp> #include <boost/bind.hpp> #include <boost/array.hpp> #include <boost/pointee.hpp> #include <cstddef> #include <iterator> #include <algorithm> #include <functional> #include <string> #include <vector> #include <iostream> #include <iomanip> template <class InIter> InIter Largest(InIter first, InIter last) { typedef typename boost::pointee<InIter>::type ObjType; InIter largest = std::max_element(first, last, boost::bind(std::less<std::size_t>(), boost::bind(&ObjType::size, _1), boost::bind(&ObjType::size, _2)) ); return largest; } // Largest template <std::size_t N> class String: public boost::array<char, N> { public: std::string str() const { if (this->back() == '\0') return std::string(this->data()); return std::string(this->data(), this->size()); } // str String() { this->assign('\0'); } String(const std::string& str_) { if (str_.size() > this->size()) throw std::runtime_error("String::ctor: str_ too big"); int copied = str_.copy(this->c_array(), this->size()); std::fill_n(this->begin() + copied, this->size() - copied, '\0'); } // ctor operator std::string() const { return str(); } }; // String using namespace std; int main(int argc, const char* argv[]) { // typedef String<64> ArgStr; // <-- This won't compile. typedef string ArgStr; // <-- This compiles/runs ok. vector<ArgStr> args; while (--argc) args.push_back(string(*++argv)); if (args.empty()) { cout << "no args!" << endl; return EXIT_FAILURE; } cout << "args="; copy(args.begin(), args.end(), ostream_iterator<string>(cout, " ")); cout << endl; vector<ArgStr>::iterator iter = Largest(args.begin(), args.end()); cout << "Largest arg is '" << string(*iter) << "'." << endl; return EXIT_SUCCESS; } // main

2 1

'configure' does not recognise '--without-python'
by MikeW 22 Nov '06

22 Nov '06

During Boost build, a line pops up saying "to avoid seeing this message again, use option --without-python". However, if you specify this as a "./configure" option, configure halts saying --without-python is unrecognised. I can live without it/work around it, but it should presumably be fixed ... Regards, Mike

2 4

[BGL] how to actually search with DFS/BFS?
by martin f krafft 22 Nov '06

22 Nov '06

This may seem like a silly question, but how does one actually search with DFS or BFS? Say I want to find the first node for which a predicate returns true in a BFS traversal starting at node N... The function signatures don't have a parameter for "criteria" or "predicate", so I guess it's up for a Visitor to implement such a check. What is not clear to me is how the visitor functions can break out of the search once a condition is true. Thanks, -- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck invalid/expired pgp subkeys? use subkeys.pgp.net as keyserver! spamtraps: madduck.bogus(a)madduck.net "information superhighway" is just an anagram for "i'm on a huge wispy rhino fart".

9 12

[BGL] Constantness bug in kruskal_minimum_spanning_tree
by Fernando Cacciola 22 Nov '06

22 Nov '06

Hi I have a graph-like data structure which supports both const and non-const vertex and edge iterators and handles, and I want to interface it to the BGL. FWIW. the iterators and handles are class types, and the const versions are different classes than the non-const ones, so removing const qualification is not the way to bind a const type to its non-const version. AFAICT, the proper way to address both types of iterator/handles is by specializing both graph_traits<MyGraph> and graph_traits<MyGraph const>. It all works fine with my own BGL-like algorithms, but now I want to call kruskal_minimum_spanning_tree and I can't. The problem is that the kruskal function takes a "const Graph&" argument but it declares the internal types like this: typedef typename graph_traits<Graph>::edge_descriptor Edge ; (and so for the vertex_descriptor, etc) but then, lines like this: tie(vb,ve) = vertices(G) or this source(e, G) fails to compile with my graph because it attempts to bind a const iterator/handle to a non-const iterator/handle, which my data structure intentionally forbids. Unless I am missing something obvious (and I hope I am), this is a bug in the kruskal function: it should declare the working types like this: typedef typename graph_traits<Graph const>::edge_descriptor Edge ; Am I right? If yes, what can I do?? Is there any "constant correct" BGL algorithm? I'm calling kruskal just as an example showing how the data structure can be interfaced to the BGL. TIA Fernando Cacciola

2 1

Re: [Boost-users] Boost configure options for crosscompilation ?
by Hughes, James 22 Nov '06

22 Nov '06

This is the command line I used to build boost using Bjam for an arm platform, not sure if that helps with what you need, but here it is anyway!! bjam "-sGCC_ROOT_DIRECTORY=/opt/montavista/mobilinux/devkit/arm/iwmmxt_le" "-sGCC=iwmmxt_le-gcc" "-sGXX=iwmmxt_le-g++" stage Stage is the folder in which all the libs are placed, other parameters should be self explanatory. James > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of MikeW > Sent: 20 November 2006 15:59 > To: boost-users(a)lists.boost.org > Subject: [Boost-users] Boost configure options for crosscompilation ? > > I would like to crosscompile Boost under Buildroot. > > I created what appeared to be a successful package file, but > found that the native compiler and tools were used rather > that Buildroot's crosscompiler toolchain. > > However, I could not see any other 'configure' options to > switch to using a crosscompiler (EPREFIX looked promising at > first but seems to be a path prefix, rather than a tool > prefix such as "arm-linux-"). > > I note an earlier post (unable to post a 'follow-up' to it) > seemed to successfully do a cross build. > > Could you tell me how Boost is 'configure'd to use the > crosstools rather than the native tools ? > > Thanks, > Mike > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately.

3 5

[regex] Conditional Replacement?
by Scott Meyers 22 Nov '06

22 Nov '06

If I want to replace all the regex matches in a string, no problem, regex_replace is just what I'm looking for. But suppose I want to replace each match only if some predicate is satisfied, e.g., to implement something like a string replacement in a text editor where the user is allowed to approve or reject each proposed replacement. Is there any direct support for something like this? The only way I can think of to do this is to iterate over the string to be searched, finding each match and then consulting the predicate to see if the replacement should be performed for that match. If so, I can call regex_replace on the found substring, but then I'll get back a new string, and I'll have to manually handle the process of knitting together the final revised string from the original string and the results of each substitution. This is essentially what regex_replace already does, except it unconditionally does a substitution for each match. What it seems I want is something like regex_replace_if. Is there such a thing in Boost or TR1? If not, is it because there is little demand for such functionality? That would surprise me, because pretty much every text editor allows one to iteratively search for a match and query the user to see if a replacement should be performed at that point. Thanks, Scott

2 1

thread: not joinable?
by Robert Marion 21 Nov '06

21 Nov '06

Hi, I've written my first boost::thread application, and I get this assertion: /boost_1_33_1/libs/thread/src/thread.cpp:223: void boost::thread::join(): Assertion 'm_joinable' failed. I call the thread as: void _pollMode( Controller& ctrl ) { // do polling ... for my testing, left blank } void SomeClass::startPolling() { m_pCtrl = new Controller; boost::function<void (Controller&)> funcPoll; funcPoll = &_pollMode; m_thr = new boost:thread(boost::bind( funcPoll, *m_pCtrl)); // never get past this line (unless copy ctor modified) } The Controller class has a copy constructor defined, which gets called several times (by the thread class?) Controller( const Controller& ctrl ) { boost::mutex::scoped_lock lock( m_mutex ); m_thr = ctrl.m_thr; // bad ?? BUT ... if I do m_thr = NULL; then everything is ok. Why??? What's going on here??? } Any help/explanation would be appreciated. Rob ____________________________________________________________________________________ Sponsored Link Mortgage rates near 39yr lows. $420k for $1,399/mo. Calculate new payment! www.LowerMyBills.com/lre

2 1

Statechart tutorial problem and possible solution
by Michael 21 Nov '06

21 Nov '06

I am going through the tutorial for Statechart. Going through the section "adding reactions", while debug build links fine, in a release mode linker issues following complaints: 1>FSM.obj : error LNK2001: unresolved external symbol "public: void __thiscall boost::statechart::detail::no_context::no_function<struct EvReset>(struct EvReset const &)" (??$no_function@UEvReset@@@no_context@detail@statechart@boost@@QAEXABUEvReset@@@Z) 1>FSM.obj : error LNK2001: unresolved external symbol "public: void __thiscall boost::statechart::detail::no_context::no_function<struct EvStartStop>(struct EvStartStop const &)" (??$no_function@UEvStartStop@@@no_context@detail@statechart@boost@@QAEXABUEvStartStop@@@Z) I ended up adding following line to my cpp file: template< class Event > void sc::detail::no_context::no_function( const Event & ) {}; and it cured the linker complaint. Michael

2 3

Problem with sub_range
by abir basak 21 Nov '06

21 Nov '06

Hi, I am not sure if it is the proper newsgroup to get answers related to boost usage. I am facing a problem with boost::sub_range for a const container which is not allowing me to access the indexed operator. Below a short program to demonstrate the problem. Necessary headers are included. Boost version 1.33.1 typedef vector<int> VI; VI v(10); int data[] = {0,1,2,3,4,5,6,7,8,9}; copy(data,data+10,v.begin());///inserted a few int to std::vector<int> ///prints 0 1 2 3 4 5 6 7 8 9 copy(v.begin(),v.end(),ostream_iterator<int>(cout," ")); cout<<endl; const VI& cv = v; /// a const reference to the container. VI::iterator it = v.begin(); ///got an random access iterator it[1] = 100; /// index operator allows to change it copy(v.begin(),v.end(),ostream_iterator<int>(cout," ")); cout<<endl; ///prints 0 100 2 3 4 ... VI::const_iterator it1 = v.begin(); ///got a const_iterator cout<<it1[1]<<endl; /// returns const_reference, assignment is not allowed, access is allowed. prints 100 boost::sub_range<VI> r(v.begin()+2,v.begin()+8); ///got a sub_range ///prints 2 3 4 5 6 7 copy(r.begin(),r.end(),ostream_iterator<int>(cout," ")); cout<<endl; r[2] = 400; cout<<r[2]<<endl;/// prints 400 ///prints 2 3 400 5 6 7 copy(r.begin(),r.end(),ostream_iterator<int>(cout," ")); ///so far everything is fine. Here problem starts /// a const sub_range ? boost::sub_range<const VI> r1(cv.begin()+2,cv.begin()+8); ///prints 2 3 400 5 6 7 copy(r1.begin(),r1.end(),ostream_iterator<int>(cout," "));cout<<endl; ///next statement is don't compile cout<<r1[2]<<endl; ///=> not allowed gives error under Visual Studio 7.1 cannot convert from 'const std::allocator<_Ty>::value_type' to 'boost::iterator_range<IteratorT>::value_type &' Why it tried to convert it to value_type& instead of const value_type& ? cout<<typeid(r1.begin()).name()<<endl; says r1.begin() is a const_iteartor. So the statement cout<<r1[2]<<endl; should return a const_reference. Am I mis interpreting the const version of sub_range ? If so, what is a const counterpart of sub_range, which behaves just like a pair of const_iterator ? Any help is appreciated. Thanks abir

3 8

[regex] compile errors on Mac OS X
by Richard Dingwall 21 Nov '06

21 Nov '06

Ran into a strange problem with boost::regex today. I get this just from including boost/regex.hpp: powerbook:~/Desktop/bre_test richard$ make g++ -pedantic -Wall -g -I/usr/local/include/boost-1_33_1/ -c -o bre_test.o bre_test.cpp /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp: In member function `bool boost::re_detail::perl_matcher<BidiIterator, Allocator, traits>::unwind_greedy_single_repeat(bool)': /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:991: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:992: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp: In member function `bool boost::re_detail::perl_matcher<BidiIterator, Allocator, traits>::unwind_slow_dot_repeat(bool)': /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1041: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1042: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp: In member function `bool boost::re_detail::perl_matcher<BidiIterator, Allocator, traits>::unwind_char_repeat(bool)': /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1159: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1160: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp: In member function `bool boost::re_detail::perl_matcher<BidiIterator, Allocator, traits>::unwind_short_set_repeat(bool)': /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1223: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1224: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp: In member function `bool boost::re_detail::perl_matcher<BidiIterator, Allocator, traits>::unwind_long_set_repeat(bool)': /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1288: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' /usr/local/include/boost-1_33_1/boost/regex/v4/perl_matcher_non_recursive.hpp:1289: error: invalid conversion from 'boost::re_detail::re_syntax_base*' to 'long int' make: *** [bre_test.o] Error 1 powerbook:~/Desktop/bre_test richard$ A test case is attached. OS X version: Darwin powerbook.local 8.8.0 Darwin Kernel Version 8.8.0: Fri Sep 8 17:18:57 PDT 2006; root:xnu-792.12.6.obj~1/RELEASE_PPC Power Macintosh powerpc

2 4

[program_options] replace environment variables in config file
by Chris Weed 21 Nov '06

21 Nov '06

Hi, I would like to be able to replace environment variables specified in config file values. For example I would like to use the env. var. (BOOST_PATH=c:\Boost) to expand the following file1=${BOOST_PATH}\include into this: file1=c:\Boost\include So I can then parse the value (c:\Boost\include) as a boost::filesystem::path. It seems like I want something similar to the extra parser for command-line options, but it doesn't seem to be possible for the config file parser. Do you have any ideas how to accomplish this? Also, is there a parser in program_options or property_tree that can parse "Java Property"-style property files, such as # My comment here cache=1kb file=c:/autoexec.bat Thanks, Chris

1 0

How to avoid specifying the boost .libs in my MSVS 2003 projects?
by Joshua Stewart 21 Nov '06

21 Nov '06

I have a static lib that uses boost/regex.hpp. (boost version 1.33.1) However when I want to use my static lib and link into a separate executable project, I have to specify the libboost_regex-vc71-mt-gd-1_33_1.lib as an input library for the executable project, so that it can link correctly with the static lib. Otherwise I get linking errors. One solution might be to make my static lib a dll... but this is not on the cards at the moment. The boost headers on some systems will make use of a #pragma to do this linking for you. I thought that if I added #include <boost/regex.hpp> To a header in my executable project, that boost would automatically identify and link against the correct boost .lib and my static lib would link without errors also. I am trying to find a nice way that I can use boost in a static lib project in visual studio 2003, and then link that in a separate project without needing to specify to specific boost .lib that the static lib requires. Any help or suggestions are appreciated. Regards, Josh This message contains confidential information and is intended only for the individual(s) named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please immediately delete it and all copies of it from your system, destroy any hard copies of it, and notify the sender. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. To the maximum extent permitted by law, Immersive Technologies Pty. Ltd. does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission.

1 0

Bug report in date_time, 1.33.0, not fixed in CVS
by Eric Teutsch 20 Nov '06

20 Nov '06

Boost::date_time uses FILETIME internally to get subsecond time resolution timestamps. When using date_time in a managed C++ environment, the compiler (VC7.1) can't differentiate between the windows global FILETIME, and the .NET System::Runtime::InteropServices::FILETIME, and therefore throws an error. If the boost header file microsec_time_clock.hpp (in boost/date_time) changes the types FILETIME to the global namespace ::FILETIME, then the naming collision goes away. This has only been tested in a limited arena, but I believe it should not affect other areas). Thank you Eric T. ________________________________________ I let my mind wander and it didn't come back.

2 2

Re: [Boost-users] Beginner's shared_ptr question...
by Hughes, James 20 Nov '06

20 Nov '06

> void MyClass::init() > { > // either > spOther = shared_ptr<someOtherClass>(new someOtherClass(this)); or > spOther.reset(new someOtherClass(this)); } > > Dave. > -- > Dave Slutzkin > Melbourne, Australia > daveslutzkin(a)fastmail.fm Another beginners question... Are the two ways of doing this, as shown above, exactly the same? i.e. execute the same code and are therefore at the same cost, or is one more efficient than the other? James > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately.

2 1

Boost configure options for crosscompilation ?
by MikeW 20 Nov '06

20 Nov '06

I would like to crosscompile Boost under Buildroot. I created what appeared to be a successful package file, but found that the native compiler and tools were used rather that Buildroot's crosscompiler toolchain. However, I could not see any other 'configure' options to switch to using a crosscompiler (EPREFIX looked promising at first but seems to be a path prefix, rather than a tool prefix such as "arm-linux-"). I note an earlier post (unable to post a 'follow-up' to it) seemed to successfully do a cross build. Could you tell me how Boost is 'configure'd to use the crosstools rather than the native tools ? Thanks, Mike

1 0

Beginner's shared_ptr question...
by Martin Waller 20 Nov '06

20 Nov '06

(g++ 3.3.5, boost 1.32) I have a program as follows: Header: //multiple include guard omitted for clarity #include <boots/shared_ptr> class someOtherClass; class MyClass { public: MyClass(); void init(); . . . private: boost::shared_ptr <someOtherClass> spOther; . . . }; Implementation #1: #include <MyClass.hpp> #include <someOtherClass.hpp> MyClass::MyClass() { init(); } void MyClass::init() { spOther(new someOtherClass(this)); } Implementation #2: #include <MyClass.hpp> #include <someOtherClass.hpp> MyClass::MyClass():spOther(new someOtherClass(this)) { } Question: Why does implementation #2 fail to compile with the error: error: no match for call to '(boost::shared_ptr<someOtherClass>)(someOtherClass*)' ? yet implementation #2 compiles fine? Please help me understand what going on here...is it possible to get implementation #2 to compile or is it 'bad code'? Thanks

3 2

How to use bind with explicit constructor conversion?
by Terry G 20 Nov '06

20 Nov '06

This doesn't compile. How best to accomplish this using generic STL or Boost algorithms/adapters? terry #include <iostream> #include <iomanip> #include <algorithm> #include <vector> #include <iterator> #include <cstdlib> #include <boost/bind.hpp> #include <boost/mem_fn.hpp> using namespace std; using namespace boost; class MyInt { int _value; public: explicit MyInt(int x=0) : _value(x) { } int value() const { return _value; } }; // MyInt int main() { vector<MyInt> v; // Do this: // for (int i=0; i!=30; ++i) v.push_back(MyInt(rand())); generate_n(back_inserter(v), 30, bind(MyInt, bind(rand))); // Now print v. transform(v.begin(), v.end(), ostream_iterator<int>(cout, "\n"), mem_fn(&MyInt::value)); return 0; } // main

2 1

boost::numeric::ublas::matrix adaptors for C style arrays
by Edward Grace 20 Nov '06

20 Nov '06

Dear All, Is it possible to adapt e.g. a pointer to double in to a ublas::matrix<double>, or construct a matrix from a pointer to double? I have used the Blitz++ libraries, with those it is possible to use storage allocated elsewhere. This is to allow the painless interface of my code with legacy C code. I would like to do something like the following: using namespace boost::numeric::ublas; double *p; p = new double[100]; .... Fill p[*] with data // Construct a 10x10 matrix using externally allocated storage. matrix<double> A(10,10,p); There does appear to be a hint that I can use my own allocator, but it is far from clear how I go about doing this. For example coming up with an Allocator function that doesn't allocate but instead uses existing memory. class MyAllocator : public GeneralAllocator { double *TheMemory; public: MyAllocator(double *p) { TheMemory = p; } allocate() {} }; matrix<double,MyAllocator> A; Failing that, I'd like an adaptor that allows me to effectively do something like: matrix<double> A; double *p; // Allocate p and fill with stuff! A = adaptor<matrix<double> >(p,nCol,nRows); A is now a 10x10 matrix<double> using the memory pointed to by p. Obviously there are issues regarding who is now responsible for this memory, something handled by the memory policy in Blitz++ (neverDelete, etc). Help!! Is there a way to do this? -ed

2 3

[Boost.General] Improvement proposals for boost data access
by Markus Werle 20 Nov '06

20 Nov '06

Hi Boosters! While trying to trace the development of some boost libraries I see opportunities for improvement concerning the boost data distribution system. I am a little bit tired of looking up 3 or 4 different places in order to find out how some code snippet or library part under development is distributed, whether it is commited to the sandbox cvs, the vault, or stored hidden below boost-consulting.com (like SummerOfCode stuff with only a mailing list post pointing to it) or whether the developer has deliberately choosen to set up his own cvs/svn tree or other distribution method e.g. via sourceforge (which might be perfectly OK, Joel!). Yet I am missing the single entry point to all these GoodThings. Things are suboptimal: Example 1: Try to find out via boost web pages where one can download the latest and greatest version of boost::fusion. You can find a version at http://spirit.sourceforge.net/, but I am unsure if it is the latest bleeding edge version ... Example 2: Function types is under review. The files are accessible via tinyurl, so boost ML content is not self-contained. If I look at it in 6 years (when <your favorite .com monster here> bought tinyurl and crashed the database), I will not be able to find any hint to where to find the files. Also if I'd like to see how that lib looked like at the time of review in order to understand the review discussion on the mailing list I am out of luck. Example 3: files in the vault are rather volatile, no file history available. Still waiting to obtain some old files mentioned in some post ... I'd like to make proposals for improvement: 1. Rule: Libraries under review _must_ be commited to cvs/svn tree of boost or boost-sandbox. In order to help people behind firewalls and resistent IT administrators, a script creates daily snapshots of cvs/svn tree which are accessible via ftp/http from boost.org similar to the way gcc is distributed. If a developer has no access via cvs/svn he/she has to find someone who can take this task (or boost has a server which provides svn on port 80 ...) Any announcement concerning reviews points to the ftp/http access point and contains the cvs/svn command which has to be used in order to obtain the files. Rationale: KISS for users. Blindly trust to find the code at one single point. 2. Rule: Posts to boost ML which link to any code snippet or fileset uploaded to the vault for discussion use a http link to the true URL at boost::vault. Using the full link is declared as netiquette rule for posting to ML. Rationale: Internet data is not persistent. A full link gives you the chance to find the file either by contacting the admin of the mentioned http server or by filename via standard search engines. 3. Technical measure: The vault is under some automatic version control (http://subversion.tigris.org/faq.html#filesystem http://noedler.de/projekte/wdfs/ http://svnbook.red-bean.com/en/1.1/apcs03.html) and versions can be retrieved via http on a per date basis, which allows to follow older discussions easily. Rationale: I recently read a discussion between Jeremy S., Joel d. G. and Dave A. which was hard to follow anyway due to the subject and due to the skill level of those who were talking. It would be much easier to get at least some minimal insight into what they were talking about if the files were still available (so I hope). Sometimes it really helps to read early stage code that is not yet polluted by all this CIRCUMVENT_BROKEN_COMPILER macros. [sidenote: looking forward to the new book: "The design and evolution of boost::mpl, boost::fusion, boost::graph and 12 other libraries" including all the chapters Dave and Alex left out in their first book ;-P] What do you think? Markus

2 4

[Filesystem]: Is an empty path relative or complete?
by Michael Partridge 20 Nov '06

20 Nov '06

Hi Boosters, I'm using the filesystem::complete function and have the following situation: bfs::path my_path(""); bfs::path current = bfs::current_path(); bfs::path p = bfs::complete(my_path, current); This results in p.string == "". Now I can see from the code that if my_path.empty() == true then a copy of my_path is returned, but I'm not certain of the rationale behind this. If I pass in an empty path and ask for it to be turned into a complete path then shouldn't I just get the base? As an additional consideration, if I go: bfs::path p = system_complete(bfs::path("")); Shouldn't I get current_path(), rather than an empty path ""? Cheers, Michael ps. sorry if this question has been answered before, I searched the archive and couldn't find any discussion.

1 0

[Serialization] NVP and xml archives
by michael mathews 19 Nov '06

19 Nov '06

Hi All, I have a class that contains a list of name value pairs . I would like the serialization to use the names for the tag names in the xml archive. Is there a way to do this or do I need to write my own custom archive? Thanks in advance Michael __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

2 7

[test] build problem/regression with RC_1_34_0
by Chris Hoeppler 18 Nov '06

18 Nov '06

Hi, With last weekend's cvs version of RC_1_34_0 is was able to use the dynamic-library version of the unit_test_framework. Since I did a cvs update yesterday I get a link error trying to do so: g++ -o build/debug/test/kern/test_macros.o -c -g -Wall -ftemplate-depth-255 -O0 -fno-inline -DBOOST_TEST_DYN_LINK -I. -I/home/hoeppler/src/boost_RC_1_34_0 test/kern/test_macros.cpp g++ -o build/debug/test/kern/test_macros -Wl,-rpath-link,. build/debug/test/kern/test_macros.o build/debug/src/kern/parser/macros.o -L/home/hoeppler/src/boost_RC_1_34_0/stage/lib -lboost_filesystem-gcc41-d -lboost_regex-gcc41-d -lboost_unit_test_framework-gcc41-d /usr/lib/gcc/i586-suse-linux/4.1.0/../../../crt1.o: In function `_start': init.c:(.text+0x18): undefined reference to `main' collect2: ld returned 1 exit status Addidtional information: This is gcc-4.1.0 on linux. The boost libs were built with the boost build system. I am setting up test_suits as follows: test_suite* init_unit_test_suite( int, char* [] ) { test_suite* test(BOOST_TEST_SUITE("Unit test macros")); // <snip> return test; } Any idea what's going wrong? Thanks Chris

3 3

[iterator] std::distance ignores random_access_traversal_tag
by Markus Werle 18 Nov '06

18 Nov '06

Hi! This was detected by profiling. I expected the code below to have a rather cheap std::distance call because my iterator was tagged as random_access. gcc-4.0.3 (cygwin) and VC8 IMHO choose the wrong std::distance algorithm, but why? The stuff compiles even when distance_to is not defined. Maybe I misunderstood the docs, especially the passage <cite url="http://boost.org/libs/iterator/doc/iterator_facade.html"> [...] where iterator-category is defined as follows: iterator-category(C,R,V) := if (C is convertible to std::input_iterator_tag || C is convertible to std::output_iterator_tag ) return C else if (C is not convertible to incrementable_traversal_tag) the program is ill-formed else return a type X satisfying the following two constraints: [..] </cite> Please explain and fix the code below. Markus #include <boost/iterator/iterator_facade.hpp> #include <boost/bind.hpp> #include <cstddef> #include <iterator> #include <iostream> template <typename ValueT, typename SizeT, typename IndexOperatorT> class signal_iter : public boost::iterator_facade <signal_iter<ValueT, SizeT, IndexOperatorT>, ValueT, // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!! boost::random_access_traversal_tag, ValueT, SizeT> { public: typedef signal_iter<ValueT, SizeT, IndexOperatorT> my_own_t; inline signal_iter(IndexOperatorT IndexOperator, SizeT index) : m_IndexOperator(IndexOperator) , m_index(index) {} // quick and dirty with a dangling reference :-( inline signal_iter() : m_IndexOperator(IndexOperatorT()) , m_index(0) {} inline SizeT index() const { return m_index; } private: friend class boost::iterator_core_access; inline void increment() { ++m_index; } inline void decrement() { --m_index; } inline void advance(SizeT i) { m_index += i; } inline SizeT distance_to(signal_iter const& other) const { return other.index() - m_index; } inline bool equal(signal_iter const& other) const { return (other.index() == m_index); } inline ValueT dereference() const { return m_IndexOperator(m_index); } protected: IndexOperatorT m_IndexOperator; SizeT m_index; }; // stripped down demo class Demo { static const std::size_t mysize_ = 20; typedef std::size_t size_type; typedef double value_type; double data_[mysize_]; public: double operator[](std::size_t i) { return data_[i]; } typedef boost::_bi::bind_t <double, boost::_mfi::mf1<double, Demo, unsigned int>, boost::_bi::list2<boost::_bi::value<Demo*>, boost::arg<1> > > bind_type; typedef signal_iter<const value_type, size_type, bind_type> const_iterator; const_iterator begin() { return const_iterator (boost::bind(&Demo::operator[], this, _1), 0); } const_iterator end() { return const_iterator (boost::bind(&Demo::operator[], this, _1), mysize_); } }; int main() { Demo demo; std::cout << std::distance(demo.begin(), demo.end())<< std::endl; }

3 5

[Boost.Asio] Watching over a socket descriptor
by Memfis 18 Nov '06

18 Nov '06

I have an external communications library (Linux), which exposes a set of high-level APIs and a socket descriptor for me to watch over (as in select()). If there is something waiting on the socket, I am to call a function from the library that will read the data, construct some structures from it and return them. My question is if and how can I integrate this into Boost.Asio, so that I could handle connections created using Boost.Asio and the external library with the same code (to the point of actually reading some data)? -- Memfis

1 0

Newbie problems resolving header paths
by DC 18 Nov '06

18 Nov '06

I downloaded 1_33_1 and it built and installed. Actually, I'm still not sure what is meant by "install" in the docs. Does something happen than copying a bunch of files to C:\Boost ? VC71 is having trouble resolving paths to the headers. I have: In the project properties, Additional Include Directories: C:\Boost\include\boost-1_33_1; In my .cpp file, I use, for example: #include <boost/date_time/gregorian/gregorian.hpp> I still get: C:\Dev\VS2003\MyProject\Engine.h(3): fatal error C1083: Cannot open include file: 'boost/date_time/gregorian/gregorian.hpp': No such file or directory Hoping I'm overlooking something simple here. Thanks! - JC

4 5

BGL: Bundled Properties in subgraphs
by Greg Reynolds 18 Nov '06

18 Nov '06

Hi, I am trying to use the subgraph class with bundled propeties and wonder if it is still broken? I found a message on the list saying that it was broken in March 2005, but would probably be fixed shortly. I include my code below. It compiles cleanly if I don't use subgraph, i.e. just declare the adjacency_list. It also works if use the internal properties method. Thanks, Greg // ... appropriate headers using namespace std; using namespace boost; typedef unsigned long int uvid; struct VertexProperty { uvid gmr_number; vector<string> labels; }; struct EdgeProperty { std::size_t biconnected_component; vector<string> labels; }; typedef adjacency_list<setS, vecS, undirectedS, VertexProperty, EdgeProperty> GraphPlain; typedef subgraph< GraphPlain > Graph; int main(int argc, char* argv[]) { GraphPlain g1; Graph g; return 0; }

3 3

[Python] Wrapping a base class' method
by bernhard.maeder＠zkb.ch 17 Nov '06

17 Nov '06

Hi Boosters I'm trying to export some base class' methods with the derived class directly. See the following code: // ----------------------------------------------------- #include <boost/python.hpp> struct my_base_class { int const & get_base_i() const { return i_; } int i_; }; struct my_class : my_base_class { int const & get_i() const { return i_; } int i_; }; using namespace boost::python; BOOST_PYTHON_MODULE(_test) { class_<my_class>("MyClass") .add_property("i", make_function(&my_class::get_i, return_value_policy<copy_const_reference>())) .add_property("basei", make_function(&my_class::get_base_i, return_value_policy<copy_const_reference>())) ; } // ----------------------------------------------------- Now python throws the following at me: h[ 1] >>> from _test import * h[ 1] >>> MyClass().basei Traceback (most recent call last): File "<stdin>", line 1, in ? Boost.Python.ArgumentError: Python argument types in None.None(MyClass) did not match C++ signature: None(my_base_class {lvalue}) So, my question is: Am I not supposed to do this at all? The same seems to work flawlessly when returning by value instead of by reference.... Thanks for your input Bernhard ___________________________________________________________________ Disclaimer: Diese Mitteilung ist nur fuer die Empfaengerin / den Empfaenger bestimmt. Fuer den Fall, dass sie von nichtberechtigten Personen empfangen wird, bitten wir diese hoeflich, die Mitteilung an die ZKB zurueckzusenden und anschliessend die Mitteilung mit allen Anhaengen sowie allfaellige Kopien zu vernichten bzw. zu loeschen. Der Gebrauch der Information ist verboten. This message is intended only for the named recipient and may contain confidential or privileged information. If you have received it in error, please advise the sender by return e-mail and delete this message and any attachments. Any unauthorised use or dissemination of this information is strictly prohibited.

2 1

[ptr_container] linker error
by Mark Snelling 17 Nov '06

17 Nov '06

Hi, I'm having trouble using the boost::ptr_container library. I seem to get this linker error with the code below under MSVC8. error LNK2001: unresolved external symbol "public: __thiscall boost::ptr_container_detail::static_move_ptr<struct Test,struct boost::ptr_container_detail::clone_deleter<struct boost::ptr_container_detail::reversible_ptr_container<struct boost::ptr_container_detail::sequence_config<struct Test,class std::list<void *,class std::allocator<void *> > >,struct boost::heap_clone_allocator>::null_clone_allocator<0> > >::static_move_ptr<struct Test,struct boost::ptr_container_detail::clone_deleter<struct boost::ptr_container_detail::reversible_ptr_container<struct boost::ptr_container_detail::sequence_config<struct Test,class std::list<void *,class std::allocator<void *> > >,struct boost::heap_clone_allocator>::null_clone_allocator<0> > >(class boost::ptr_container_detail::static_move_ptr<struct Test,struct boost::ptr_container_detail::clone_deleter<struct boost::ptr_container_detail::reversible_ptr_container<struct boost::ptr_container_detail::sequence_config<struct Test,class std::list<void *,class std::allocator<void *> > >,struct boost::heap_clone_allocator>::null_clone_allocator<0> > > &)" (??0?$static_move_ptr@UTest@@U?$clone_deleter@U ?$null_clone_allocator@$0A@@?$reversible_ptr_container@ U?$sequence_config@UTest@@V?$list@PAXV?$allocator@PAX@std@@@std@@@ ptr_container_detail@boost@@Uheap_clone_allocator@3@@ ptr_container_detail@boost@@@ptr_container_detail@boost@@@ ptr_container_detail@boost@@QAE@AAV012@@Z) ----- SAMPLE CODE BEGIN ----- #include <boost/ptr_container/ptr_list.hpp> struct Test { int a; int b; }; typedef boost::ptr_list< Test > MyList; typedef MyList::auto_type TestPtr; struct MyClass { MyList theList; void push( TestPtr& t ) { theList.push_back( t.release() ); } TestPtr pop() { TestPtr t = theList.pop_front(); return t; } }; int main( int argc, char* argv[] ) { TestPtr t( new Test ); MyClass c; c.push( t ); t = c.pop(); return 0; } ----- SAMPLE CODE END ----- I'm not aware of the ptr_container library having an import library and am at a loss at why this error is occurring, although it seems to be with the MyClass::pop() method. Is it because it's returning the auto_type by value? If so what are the alternatives? Any help would be greatly appreciated. Thanks Mark.

2 1

[asio] error_code and categories
by Dean Kassmann 17 Nov '06

17 Nov '06

With the new changes to asio error handling; I'm updating some code and running into a problem on windows with vc8 The old syntax: void my_handler(const asio::error& error) { if (!error) { // woot sucess } else { // failure } } The new syntax: void handler(const boost::system::error_code& error) { if (error == boost::asio::error::success) { // doesn't work because error_code::category() differs } else { // failure } } doesn't seem to work because the error_code categories differ. Am I doing somthing wrong/stupid? Cheers, Dean

2 1

[asio] error using cvs version with vc71... multiple definitions
by Andrew Schweitzer 17 Nov '06

17 Nov '06

I am have probably screwed up something simple... I can't seem to compile file including boost/asio.hpp from CVS. I get redefinition errors... apparently Winsock.h, winsock2.h, mswsock.h and some other files seem to be fighting. Any clue what I did wrong or how to fix? Last update was in last couple days. Thanks Andy

2 16

[mpl] - map with more than 20 entries?
by Oliver.Kowalke＠qimonda.com 16 Nov '06

16 Nov '06

Hi, how can I store more than 20 entries in mpl::map? regards, Oliver

2 1