- Boost-users - lists.boost.org

[Boost Graph Library] Example fails with dynamic allocated array?
by r89 18 Nov '08

18 Nov '08

Hi all, The following code is from http://www.boost.org/doc/libs/1_37_0/libs/graph/example/dijkstra-example.cpp and it works fine on my computer. However, if I change int weights[] = { 1, 2, 1, 2, 7, 3, 1, 1, 1 }; to int *weights = new int[9]; and, similarly, change the edge_array to Edge *edge_array = new Edge[9]; (followed by assigning the weights and edges of course), then the results are different than the original code. Can anyone see why they are different? The reason I need to dynamically allocate, is because I don't know the number of nodes and edges at compile time. Please provide suggestions, thanks a lot! (Code below comes from http://www.boost.org/doc/libs/1_37_0/libs/graph/example/dijkstra-example.cpp) typedef adjacency_list < listS, vecS, directedS, no_property, property < edge_weight_t, int > > graph_t; typedef graph_traits < graph_t >::vertex_descriptor vertex_descriptor; typedef graph_traits < graph_t >::edge_descriptor edge_descriptor; typedef std::pair<int, int> Edge; const int num_nodes = 5; enum nodes { A, B, C, D, E }; char name[] = "ABCDE"; Edge edge_array[] = { Edge(A, C), Edge(B, B), Edge(B, D), Edge(B, E), Edge(C, B), Edge(C, D), Edge(D, E), Edge(E, A), Edge(E, B) }; int weights[] = { 1, 2, 1, 2, 7, 3, 1, 1, 1 }; int num_arcs = sizeof(edge_array) / sizeof(Edge); graph_t g(edge_array, edge_array + num_arcs, weights, num_nodes); property_map<graph_t, edge_weight_t>::type weightmap = get(edge_weight, g); std::vector<vertex_descriptor> p(num_vertices(g)); std::vector<int> d(num_vertices(g)); vertex_descriptor s = vertex(A, g); dijkstra_shortest_paths(g, s, predecessor_map(&p[0]).distance_map(&d[0])); -- View this message in context: http://www.nabble.com/-Boost-Graph-Library--Example-fails-with-dynamic-allo… Sent from the Boost - Users mailing list archive at Nabble.com.

3 2

Up-casting shared_ptr
by david.weber＠l-3com.com 18 Nov '08

18 Nov '08

We're using smart pointers, and due to the way that they are created, we wish to hide the functionality behind a static create() function for each class. That way, the callers only need call create() and they have a smart_pointer to a new object, without having to worry too much about implementation details. So, this has been working fine, until I tried doing some polymorphism. Basically, we have a smart pointer to a base class, where the derived class is chosen at run time, (based on what the caller wants to do). The base class is pure virtual, so we don't know, (or care to know) how the child class implements its functionality. The following code illustrates what I'm trying to do: #include <iostream> #include <boost/shared_ptr.hpp> // Base class class base { public: typedef boost::shared_ptr<base> SharedPtr; ~base(){}; virtual void foo(){ std::cout << "base" << std::endl;}; static SharedPtr create(){ return SharedPtr(new base); }; protected: base(){}; }; // Derived class class d1 : base { public: typedef boost::shared_ptr<d1> SharedPtr; ~d1(){}; void foo() {std::cout << "derived 1" << std::endl;}; static SharedPtr create() { return SharedPtr(new d1); }; protected: d1(){}; }; int main() { base::SharedPtr bsp; d1::SharedPtr d1sp = d1::create(); d1sp->foo(); // This is producing the error. I want to upcast my d1::SharedPtr to a // base::SharedPtr, so that it can be stored, and the reference count // is still intact bsp = boost::static_pointer_cast<base>(d1sp); } And here is the error that I'm getting (from Visual Studio 2003) c:\Program Files\boost\boost_1_35_0\boost\shared_ptr.hpp(222) : error C2243: 'static_cast' : conversion from 'd1 *const' to 'boost::shared_ptr<T>::element_type * with [T=base]' exists, but is inaccessible; c:\Program Files\boost\boost_1_35_0\boost\shared_ptr.hpp(513) : see reference to function template instantiation 'boost::shared_ptr<T>::shared_ptr<d1>(const boost::shared_ptr<d1> &,boost::detail::static_cast_tag) with [T=base]' being compiled; c:\Documents and Settings\td26134\Desktop\trunk1\main.cpp(54) : see reference to function template instantiation 'boost::shared_ptr<T> boost::static_pointer_cast<base,d1>(const boost::shared_ptr<d1> &) with [T=base]' being compiled Thanks.. --dw

2 2

[spirit2] Trivial parser crashes
by sm4 18 Nov '08

18 Nov '08

Hello, Playing with spirit-2 (boost 1.36 release) I got the following code to ASSERT when compiled on Visual Studio 2008/SP1. Any ideas what's wrong? ---------------------------------------------------------- #include #include #include #include #include #include #include #include #include using namespace boost::spirit; using namespace boost::spirit::qi; using namespace boost::spirit::ascii; using namespace boost::spirit::arg_names; namespace phoenix = boost::phoenix; using phoenix::at_c; struct key_val { std::string key; std::string value; }; BOOST_FUSION_ADAPT_STRUCT( key_val, (std::string, key) (std::string, value) ) template struct my_grammar : grammar { my_grammar() : my_grammar::base_type(start) { quoted_string %= lexeme['"' >> +(char_ - '"') >> '"']; key %= quoted_string; value %= quoted_string; start = key [at_c<0>(_val) = _1] >> ':' >> value [at_c<1>(_val) = _1] ; } rule key; rule quoted_string; rule value; rule start; }; int main() { typedef std::string::const_iterator citerator; std::string str = "\"x\": \"25\" "; citerator iter = str.begin(); citerator end = str.end(); my_grammar my_parser; key_val kv; phrase_parse(iter, end, my_parser, kv, space); // ASSERTs return 0; } -------------------------------------------------------------------------- thanks -- View this message in context: http://www.nabble.com/-spirit2--Trivial-parser-crashes-tp19624910p19624910.… Sent from the Boost - Users mailing list archive at Nabble.com.

5 9

rint, the interval library and Visual Studio 2008
by Stephan Puchegger 18 Nov '08

18 Nov '08

Dear group members! I am currently using the interval library and the following linker errors pop up: error LNK2028: unresolved token (0A000596) "extern "C" double __cdecl rint(double)" (?rint@@$$J0YANN@Z) referenced in function "public: static double __cdecl boost::numeric::interval_lib::detail::x86_rounding::to_int(double const &)" (?to_int@x86_rounding@detail@interval_lib@numeric@boost@@$$FSANABN@Z) Internal.obj Docs.Evaluation error LNK2019: unresolved external symbol "extern "C" double __cdecl rint(double)" (?rint@@$$J0YANN@Z) referenced in function "public: static double __cdecl boost::numeric::interval_lib::detail::x86_rounding::to_int(double const &)" (?to_int@x86_rounding@detail@interval_lib@numeric@boost@@$$FSANABN@Z) Internal.obj Docs.Evaluation rint does not show up in the MSDN documentation. This seems to be another example of Microsofts C99 compliance problems if I am not mistaken. I found a bug in the bug-database (#446: Bugs: MSVC support (closed: Wont Fix)) but when I try to view the bugreport all I get is a "Trac detected an internal error: TypeError: a float is required". Guillaume Melquiond seems to have posted a workaround in https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1246358&group_… but I cannot view this either, because this artifact is private and can be viewed only be groupmembers of a certain group (no idea which one). Would it not be a solution to simply add an rint implementation to the interval library? Best regards Stephan -- Stephan Puchegger Dynamics of Condensed Systems Faculty of Physics University of Vienna Strudlhofgasse 4, A-1090 Vienna Tel: ++43 (0) 1 4277 51352 Email: stephan.puchegger(a)univie.ac.at

2 1

Re: [Boost-users] Problem compiling with CodeGear Borland 2007
by Philip Ogunbona 18 Nov '08

18 Nov '08

Thanks to David (siliconman) and Nicola Musatti. Your posts are very helpful in understanding and resolving the problem. bcbboost is a great site, well done Nicola. Regards, Philip Ogunbona

1 0

Speed up bjam
by Simon Pickles 18 Nov '08

18 Nov '08

Hi, Is there any way to make bjam only scan files for changes in the current working directory, rather than the whole boost installation? I hoped this would speed up the bjam build process. Everytime I do a build I get, for example: ...patience... ...patience... ...found 2982 targets... ...updating 6 targets... Wouldn't be quicker if it wasn't checking 3000 files each build? its a very slow machine you see! 900 MHZ! Thanks Simon -- Linux Counter: User# 424693 -- Linux Counter: User# 424693

2 1

[Program Options] Multi-char option alias
by Uli Köhler 18 Nov '08

18 Nov '08

Hi everyone, is there a way to declare an alias for an options with more than one character, for example: options_description desc("Allowed options") desc.addOptions() ("disable-header,dh", "Disable") ; I'm using Boost 1.37.0 on Linux x64 and when I try to run the program it displays: "-d [ --disable-header ] Disable" The character 'd' is otherwise used (and 'h' is also not available) Do you know how to tell program_options to use a multi-character alias? Thanks in advance

1 0

Two issues - An error I think due to some invalid pointer and another speed problem.
by Raj Prasan 18 Nov '08

18 Nov '08

this is my second post. first I had a problem of a crash during startup and later changed my entry point and solved it. I got help from this list. Thanks a lot for that again.. This time I need some ways to debug it. Or a direct solution if possible. Please help this n00b folks. Scenario.. A AutoCAD like program. OpengL based.. Windows XP SP2 Code : C++ Mixed (native + managed.NET) /w CLR VS 2008, no MFC My code is pretty complex with a lot of classes, STL lists, maps pointers of the same objects in lists in different places. Issue 1 Moreover after adding the serialization library, the compile time has heavily increased. And the full system slows down. When compiling the task manager shows around 500 mb usage for the compilation process. I had a really lot of warning generated.. I mean more than 300 maybe or more. So I just disabled them in the settings. Compile Time - 7 mins 44 secs Link Time - 1 min 30 secs Total - 9 mins 14 secs Code is hardly 6000 to 10000 lines.. Can anyone guide me or give me links to articles that can help me.. Issue 2 Later I had this SEHException.. then I had to add try catch and found it raised unregistered class exception, so I fixed it adding BOOST_CLASS_EXPORT() below each class declaration... I still had some problems of redefinition, so I simply removed serialization from some classes and fixed that. Later I got some void cast exception, I still commented some more serialization code. Now It runs fine and gets me an file when I serialize immediately after initialization. After that when I create some lines/circles etc, and then serialize It gives me another error... BREAKS at xtree header - Call Stack > New Rapid Vision.exe!std::_Tree<std::_Tset_traits<boost::archive::detail::basic_oarchive_impl::aobject,std::less<boost::archive::detail::basic_oarchive_impl::aobject>,std::allocator<boost::archive::detail::basic_oarchive_impl::aobject>,0> >::_Orphan_ptr(std::_Tree<std::_Tset_traits<boost::archive::detail::basic_oarchive_impl::aobject,std::less<boost::archive::detail::basic_oarchive_impl::aobject>,std::allocator<boost::archive::detail::basic_oarchive_impl::aobject>,0> > & _Cont={...}, std::_Tree_nod<std::_Tset_traits<boost::archive::detail::basic_oarchive_impl::aobject,std::less<boost::archive::detail::basic_oarchive_impl::aobject>,std::allocator<boost::archive::detail::basic_oarchive_impl::aobject>,0> >::_Node * _Ptr=0x00000000) Line 1376 + 0x5 bytes C++ New Rapid Vision.exe!std::_Tree<std::_Tset_traits<boost::archive::detail::basic_oarchive_impl::aobject,std::less<boost::archive::detail::basic_oarchive_impl::aobject>,std::allocator<boost::archive::detail::basic_oarchive_impl::aobject>,0> >::clear() Line 971 C++ New Rapid Vision.exe!std::_Tree<std::_Tset_traits<boost::archive::detail::basic_oarchive_impl::aobject,std::less<boost::archive::detail::basic_oarchive_impl::aobject>,std::allocator<boost::archive::detail::basic_oarchive_impl::aobject>,0> >::erase(std::_Tree<std::_Tset_traits<boost::archive::detail::basic_oarchive_impl::aobject,std::less<boost::archive::detail::basic_oarchive_impl::aobject>,std::allocator<boost::archive::detail::basic_oarchive_impl::aobject>,0> >::const_iterator _First={address=0x0578d980 class_id={...} object_id={...} }, std::_Tree<std::_Tset_traits<boost::archive::detail::basic_oarchive_impl::aobject,std::less<boost::archive::detail::basic_oarchive_impl::aobject>,std::allocator<boost::archive::detail::basic_oarchive_impl::aobject>,0> >::const_iterator _Last={address=0xcdcdcdcd class_id={...} object_id={...} }) Line 938 C++ New Rapid Vision.exe!std::_Tree<std::_Tset_traits<boost::archive::detail::basic_oarchive_impl::aobject,std::less<boost::archive::detail::basic_oarchive_impl::aobject>,std::allocator<boost::archive::detail::basic_oarchive_impl::aobject>,0> >::_Tidy() Line 1421 + 0x77 bytes C++ New Rapid Vision.exe!std::_Tree<std::_Tset_traits<boost::archive::detail::basic_oarchive_impl::aobject,std::less<boost::archive::detail::basic_oarchive_impl::aobject>,std::allocator<boost::archive::detail::basic_oarchive_impl::aobject>,0> >::~_Tree<std::_Tset_traits<boost::archive::detail::basic_oarchive_impl::aobject,std::less<boost::archive::detail::basic_oarchive_impl::aobject>,std::allocator<boost::archive::detail::basic_oarchive_impl::aobject>,0> >() Line 541 C++ New Rapid Vision.exe!std::set<boost::archive::detail::basic_oarchive_impl::aobject,std::less<boost::archive::detail::basic_oarchive_impl::aobject>,std::allocator<boost::archive::detail::basic_oarchive_impl::aobject> >::~set<boost::archive::detail::basic_oarchive_impl::aobject,std::less<boost::archive::detail::basic_oarchive_impl::aobject>,std::allocator<boost::archive::detail::basic_oarchive_impl::aobject> >() + 0xf bytes C++ New Rapid Vision.exe!boost::archive::detail::basic_oarchive_impl::~basic_oarchive_impl() + 0x59 bytes C++ New Rapid Vision.exe!boost::archive::detail::basic_oarchive_impl::`scalar deleting destructor'() + 0xf bytes C++ New Rapid Vision.exe!boost::archive::detail::basic_oarchive::~basic_oarchive() Line 407 + 0x1f bytes C++ [Managed to Native Transition] New Rapid Vision.exe!<Module>.boost.archive.detail.common_oarchive<boost::archive::text_oarchive>.{dtor}() + 0x18 bytes New Rapid Vision.exe!boost::archive::basic_text_oarchive<boost::archive::text_oarchive>::~basic_text_oarchive<boost::archive::text_oarchive>() Line 126 + 0xe bytes C++ New Rapid Vision.exe!boost::archive::text_oarchive_impl<boost::archive::text_oarchive>::~text_oarchive_impl<boost::archive::text_oarchive>() Line 71 + 0x12 bytes C++ New Rapid Vision.exe!boost::archive::text_oarchive::~text_oarchive() Line 88 + 0xe bytes C++ New Rapid Vision.exe!RCadApp::savetofile() Line 210 + 0x9 bytes C++ New Rapid Vision.exe!RCadApp::changeHandler(RCadApp::HANDLERLIST = 3) Line 661 C++ New Rapid Vision.exe!ToolStripButtonSettings::DrawTools(System::Object^ o = 0x021d29e8, System::Windows::Forms::MouseEventArgs^ e = 0x02279a28) Line 258 C++ System.Windows.Forms.dll!System.Windows.Forms.ToolStripItem.RaiseMouseEvent(object key, System.Windows.Forms.MouseEventArgs e) + 0x4a bytes System.Windows.Forms.dll!System.Windows.Forms.ToolStripItem.HandleMouseDown(System.Windows.Forms.MouseEventArgs e) + 0xbb bytes System.Windows.Forms.dll!System.Windows.Forms.ToolStripItem.FireEventInteractive(System.EventArgs e, System.Windows.Forms.ToolStripItemEventType met) + 0x9e bytes System.Windows.Forms.dll!System.Windows.Forms.ToolStripItem.FireEvent(System.EventArgs e, System.Windows.Forms.ToolStripItemEventType met) + 0x122 bytes System.Windows.Forms.dll!System.Windows.Forms.ToolStrip.OnMouseDown(System.Windows.Forms.MouseEventArgs mea) + 0x111 bytes System.Windows.Forms.dll!System.Windows.Forms.Control.WmMouseDown(ref System.Windows.Forms.Message m, System.Windows.Forms.MouseButtons button, int clicks) + 0xf1 bytes System.Windows.Forms.dll!System.Windows.Forms.Control.WndProc(ref System.Windows.Forms.Message m) + 0x4d3 bytes System.Windows.Forms.dll!System.Windows.Forms.ScrollableControl.WndProc(ref System.Windows.Forms.Message m) + 0x45 bytes System.Windows.Forms.dll!System.Windows.Forms.ToolStrip.WndProc(ref System.Windows.Forms.Message m = {msg=0x203 (WM_LBUTTONDBLCLK) hwnd=0x170362 wparam=0x1 lparam=0x4c000a result=0x0}) + 0x71 bytes System.Windows.Forms.dll!System.Windows.Forms.Control.ControlNativeWindow.OnMessage(ref System.Windows.Forms.Message m) + 0xd bytes System.Windows.Forms.dll!System.Windows.Forms.Control.ControlNativeWindow.WndProc(ref System.Windows.Forms.Message m) + 0x36 bytes System.Windows.Forms.dll!System.Windows.Forms.NativeWindow.DebuggableCallback(System.IntPtr hWnd, int msg = 515, System.IntPtr wparam, System.IntPtr lparam) + 0x57 bytes [Native to Managed Transition] user32.dll!7e418734() [Frames below may be incorrect and/or missing, no symbols loaded for user32.dll] user32.dll!7e418816() user32.dll!7e4189cd() [Managed to Native Transition] System.Windows.Forms.dll!System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(int dwComponentID, int reason = -1, int pvLoopData = 0) + 0x2f1 bytes System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(int reason = -1, System.Windows.Forms.ApplicationContext context = {System.Windows.Forms.ApplicationContext}) + 0x17d bytes System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoop(int reason, System.Windows.Forms.ApplicationContext context) + 0x53 bytes System.Windows.Forms.dll!System.Windows.Forms.Application.Run(System.Windows.Forms.Form mainForm) + 0x2e bytes New Rapid Vision.exe!main(array<System::String^> ^ args = {Length=0}) Line 18 C++ New Rapid Vision.exe!mainCRTStartupStrArray(array<System::String^> ^ arguments = {Length=0}) Line 309 + 0x9 bytes C++ mscoree.dll!7900b1b3() kernel32.dll!7c816fd7() -- With best Regards Quakeboy

1 0

Problem compiling with CodeGear Borland 2007
by Philip Ogunbona 18 Nov '08

18 Nov '08

Dear Boost users: I have been successful in using boost under gcc 4.3. (running Linux FC9). I wanted to try compiling under Windows environment - Borland C++ 2007. A simple program using "boost/numerics/ublas/vector.hpp" will not compile. I got errors like: [BCC32 Error] is_reference.hpp(46) E2135 Reference cannot be declared 'const' or 'volatile' etc. I have looked at the header file "is_reference.hpp" to see if I could make something out of the line 46. It turns to be a "workaround" for BORLAND compiler. There is a comment to the effect "theses are illegal specializations: cv-qualifies applied to references have no effect according to [8.3.2p1], C++ Builder requires them though it treats cv-qualified reference as distinct types ..." I would like to know if any has been successful in using Borland compiler with boost library based codes. Regards, Philip Ogunbona

3 2

thread linking strangeness
by James Sutherland 18 Nov '08

18 Nov '08

I am observing strange things while linking boost::thread on a linux system with gcc 3.4.6. If I link an app with -L[path to boost.thread] -lboost_thread-gcc34-mt then it links fine. If I link with [path to boost.thread]/libboost_thread-gcc34-mt-1_36.a then I get linker errors with unresolved externals to things like: pthread_mutexattr_init pthread_detach pthread_getspecific I suspect it has to do with dynamic vs. static libraries. I have two flavors built: libboost_thread-gcc34-mt-1_36.so.1.36.0 libboost_signals-gcc34-mt-1_36.a So I suspect that in the first case I am getting a dll while in the second case the static link fails for some reason. Any suggestions/ tips to get the static link to work?

2 1