September 2008 - Boost-users - lists.preview.boost.org

Boost.tokenizer, splitting at a space only boundary
by Sean Farrow 12 Sep '08

12 Sep '08

Hi: Is the a function provided with boost.tokenizer to split at a space only boundary, rather than space and punctuation? Cheers Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 3436 (20080911) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

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Is there a false-position root finding method in boost
by Peng Yu 12 Sep '08

12 Sep '08

Hi, #include <boost/math/tools/roots.hpp> There are a few root finding algorithm in the above file. I'm not sure if there is the false-position method in there? What I want is give an interval which only has one root. I want to always find the root in that interval. I'm wondering if any function in that header can do so or not. Thanks, Peng

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wrap native C++ DLL used Boost libs, into .NET
by aidforsoft＠mail.ru 12 Sep '08

12 Sep '08

Hello! I need to use a DLL used Boost, in .NET projects. I wrapped this lib, but I cannot use the wrapping, because System.BadImageFormatException (is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)) raises at once, if I executing an application using the wrap. Wrap scheme: Native DLL --- .NET Class Library --- .NET Project. I'm wrapping every class in native DLL into .NET class. I using some principles from the "Expert C++/CLI: .NET for Visual C++ Programmers" by Marcus Heege. When I wrote a small test project, I discovered that if I only include anyone Boost header into native DLL, it set the System.BadImageFormatException permanently. Without Boost wrapping works perfectly. I use: Boost 1.35.0 Visual Stidio 2005 SP1, 2008 - same results in all cases. Windows XP SP2 x86. I found same problems in Internet - impossible to wrap native DLLs, used Boost. All this problems were unsolved. Such as: http://objectmix.com/dotnet/121318-not-valid-win32-application-exception-hr… -- Best regards, Ilya Chumakov mailto:aidforsoft@mail.ru

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[Asio] Multiple Servers using io_service
by Dominik Steenken 12 Sep '08

12 Sep '08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello everyone, i am trying to create a program where two servers accept incoming tcp connections, each at a different port. I worked through the tutorials and the used async_accept as described there to listen for connections. For a single server that worked fine. For the second server i postponed calling io_service.run() until both async_accept operations were executed. Both Instances use the same io_service. But now neither port is opened when i start the program. No exceptions, nothing. I realize that i am new to using boost and that this may be a stupid question, but still, it is a puzzling error to me and time is somewhat of the essence here, so if you could please give me a hint on how to proceed, i would greatly appreciate it. Thanks in advance, Dominik Steenken -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFIyYVKaIgTXFmz1t0RAgzKAJ9gvNcQl5+TVuiQJv8qQA+cGubeTgCeMEQo yZV1pq14n481VkdomJUgwAE= =UpHz -----END PGP SIGNATURE-----

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Static linkage in shared object
by Graham Bull 12 Sep '08

12 Sep '08

Hi all, Using Linux and g++, is it possible to create a shared object that statically links to Boost.Thread (1.33.1)? I'm doing something like: g++ -static -pthread -lboost_thread-gcc-mt -shared -o <name>.so <sourcefiles> to create a shared object (it's a JNI library written in C++). It compiles fine, but when I use it from Java I always getting an exception stating that libboost_thread-gcc-mt-1_33_1.so.1.33.1 cannot be found - but that's intentional, I haven't put /usr/local/lib in LD_LIBRARY_PATH because I don't want to dynamically link. Any help greatly appreciated!

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Re: [Boost-users] Puzzled: compiler can't find a match for function call
by JOAQUIN M. LOPEZ MUÑOZ 11 Sep '08

11 Sep '08

________________________________________ De: boost-users-bounces(a)lists.boost.org [boost-users-bounces(a)lists.boost.org] En nombre de Zeljko Vrba [zvrba(a)ifi.uio.no] Enviado el: jueves, 11 de septiembre de 2008 17:05 Para: boost-users(a)lists.boost.org Asunto: Re: [Boost-users] Puzzled: compiler can't find a match for functioncall > Indeed it works. Could you please explain why the compiler can deduce > K in BF::map<BF::pair<K, int> > , but not in typename id_t<K>::type? Suppose that id_t<K1>::type == id_t<K2>::type == int (for instance). If we pass int, how can the compiler figure out whether it's K1 or K2 that has to be deduced? Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

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boost::regex linking errors
by rsennat 11 Sep '08

11 Sep '08

hi all, im using boost::regex for the first time. #include <boost/regex.hpp> string aliasCmd = "xyz * abc"; boost::regex regExp("[*]", boost::regex::basic); aliasCmd = boost::regex_replace(aliasCmd, regExp, "INST"); There were no compiler errors. But during linking, I get the errors as below. Could anyone please get me on this. Thanks rsennat ../../../lib/FREEBSD_6_i686/libobj.a(IObject.o): In function `basic_regex': /sviews/ag_cli_tools//fw-boost/boost/regex/v4/basic_regex.hpp:340: undefined ref erence to `boost::reg_expression<char, boost::regex_traits<char>, std::allocator <char> >::reg_expression(char const*, unsigned int, std::allocator<char> const&) ' ../../../lib/FREEBSD_6_i686/libobj.a(IObject.o): In function `~basic_regex': /sviews/ag_cli_tools//fw-boost/boost/regex/v4/basic_regex.hpp:347: undefined ref erence to `boost::reg_expression<char, boost::regex_traits<char>, std::allocator <char> >::~reg_expression()' /sviews/ag_cli_tools//fw-boost/boost/regex/v4/basic_regex.hpp:347: undefined ref erence to `boost::reg_expression<char, boost::regex_traits<char>, std::allocator <char> >::~reg_expression()' ../../../lib/FREEBSD_6_i686/libobj.a(IObject.o): In function `boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std:: basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::alloca tor<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string <char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits <char>, std::allocator<char> >::unwind_extra_block(bool)': /sviews/ag_cli_tools//fw-boost/boost/regex/v4/perl_matcher_non_recursive.hpp:904 : undefined reference to `boost::re_detail::put_mem_block(void*)' -- View this message in context: http://www.nabble.com/boost%3A%3Aregex-linking-errors-tp19438899p19438899.h… Sent from the Boost - Users mailing list archive at Nabble.com.

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Re: [Boost-users] Borland c++ 5.8.2 and Boost 1.3.6 - Thread problem???
by Stephen Kierzewski 11 Sep '08

11 Sep '08

Hello, With some further troubleshooting, I can now see the issue seems to be an access violation in cc3270MT.dll. Below are the stack trace and the actual Windows error message. It looks like Boost is actually working fine, but when the thread is created, cc3270MT.dll raises an exception. :7c812aeb kernel32.RaiseException + 0x52 :32758966 CC3270MT.___raiseDebuggerException + 0x1a :32758a40 CC3270MT.___raiseDebuggerException + 0xf4 :7c9032a8 ntdll.RtlConvertUlongToLargeInteger + 0x6a :7c90327a ntdll.RtlConvertUlongToLargeInteger + 0x3c :7c90e46a ntdll.KiUserExceptionDispatcher + 0xe :32779df2 CC3270MT.__beginthreadex + 0x22 :00341a04 BOOST_THREAD-BCB-MT-1_36.@boost@thread@start_thread$qv + 0x30 :00401769 boost::thread::thread(this=:0013FF74, f=:004012E0) :004016BC main() :32778e3e ; C:\WINDOWS\system32\CC3270MT.DLL First chance exception at $7C812AEB. Exception class EAccessViolation with message 'Access Violation'. Process ThreadTest.exe (3544) Any thoughts? Thanks, Stephen ---------------------------------------------------------------- Original Post: Hello, Has anyone successfully compiled the Boost libraries with the Borland / Codegear Turbo C++ Pro, compiler version 5.8.2? I was able to build the libraries but I got a lot of errors and a simple Hello World program using boost::thread will not work. Any help on switches or tweaks I can do to get Boost to work would be appreciated. Here is the program I am compiling and the error I get when running it. I am linking to the debug version of the multi-threaded DLL (boost_thread-bcb-mt-d-1_36.dll) The sample program compiles fine but when I run it I get an assertion error and the program terminates. Any feedback is welcome. Thank you, Stephen ________________________________ Assertion failed: p_ != 0, file .\boost/intrusive_ptr.hpp, line 149 Abnormal program termination ________________________________ #include <boost/thread/thread.hpp> #include <iostream> using namespace std; void hello_world() { cout << "Hello world, I'm a thread!" << endl; } int main(int argc, char* argv[]) { // start a new thread that calls the "hello_world" function boost::thread my_thread(&hello_world); // wait for the thread to finish my_thread.join(); return 0; }

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accessing graph vertices by index
by Will Chen 11 Sep '08

11 Sep '08

Is this doable? Here's my graph: struct NodeProperties { map<string, string> Properties; }; struct EdgeProperties { map<string, string> Properties; }; typedef adjacency_list<vecS, vecS, directedS, NodeProperties, EdgeProperties> BipartiteGraph; So I'm using vecS for the vertexlist, so I should be able to access them by index right? -- William Yun Chen '09 Hinman Box 1826 Dartmouth College Hanover, NH, 03755

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scoped_ptr initialization
by UberMongoose 11 Sep '08

11 Sep '08

Hi All, I'm new to Boost, and I've been taking a look at scoped pointers. Here's the example from the boost documentation: ---------------------------------------------------------------------- #include <boost/scoped_ptr.hpp> #include <iostream> struct Shoe { ~Shoe() { std::cout << "Buckle my shoe\n"; } }; class MyClass { boost::scoped_ptr<int> ptr; public: MyClass() : ptr(new int) { *ptr = 0; } int add_one() { return ++*ptr; } }; int main() { boost::scoped_ptr<Shoe> x(new Shoe); MyClass my_instance; std::cout << my_instance.add_one() << '\n'; std::cout << my_instance.add_one() << '\n'; } ---------------------------------------------------------------------- I notice that the creation of a new object for the scoped pointer has been done before the MyClass constructor. However you can't declare the scoped pointer as a member variable and then do something like this in a method: protected: scoped_pointer<ArbitaryObject> mPointerToObject; .... // Later mPointerToObject ( new ArbitaryObject() ); Why is that? Thanks! -- View this message in context: http://www.nabble.com/scoped_ptr-initialization-tp19431388p19431388.html Sent from the Boost - Users mailing list archive at Nabble.com.

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