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string boost::split
by Dmitry Teslenko 15 Apr '08

15 Apr '08

Hello! For example I want to split string with single char '\t' delimeter. According to docs this can be done this way: std::vector<std::string> options; std::string sep; sep += '\t'; boost::split(options, line, boost::is_any_of(sep)); But if I want to use double tab as a delimiter? Is there an alternative to boost::is_any_of like "boost::just_what_i_say"

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[serialization] Is anybody else having problems building serialization?
by John Femiani 15 Apr '08

15 Apr '08

Hi, I am having problems building the serialization library with svn HEAD. I checked out the boost trunk into C:/JOHN/hvm/src/boost, and recently I began seeing this when I build boost with vc8.0: C:\JOHN\hvm\src\boost>..\..\bin\bjam --build-type=complete --stagedir=..\..\ threading=multi link=static --toolset=msvc --with-serialization stage libs\config\test\Jamfile.v2:41: in modules.load rule compile-fail unknown in module Jamfile</C:/JOHN/hvm/src/boost/libs/config/test>. C:/JOHN/hvm/src/boost/tools/build/v2/build\project.jam:307: in load-jamfile C:/JOHN/hvm/src/boost/tools/build/v2/build\project.jam:63: in load C:/JOHN/hvm/src/boost/tools/build/v2/build\project.jam:116: in load-parent C:/JOHN/hvm/src/boost/tools/build/v2/build\project.jam:443: in initialize C:/JOHN/hvm/src/boost/tools/build/v2/build\project.jam:297: in load-jamfile C:/JOHN/hvm/src/boost/tools/build/v2/build\project.jam:63: in load C:/JOHN/hvm/src/boost/tools/build/v2/build\project.jam:167: in project.find C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:354: in find-really C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:408: in object(project-target)(a)79.find C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:827: in resolve-reference C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:843: in targets.generate-from-reference C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:1129: in generate-dependencies C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:1176: in object(typed-target)(a)84.generate C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:742: in generate-really C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:715: in object(main-target)(a)150.generate C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:254: in object(project-target)(a)79.generate C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:858: in targets.generate-from-reference C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:1129: in generate-dependencies C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:1179: in object(install-target-class)(a)70.generate C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:742: in generate-really C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:715: in object(main-target)(a)129.generate C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:858: in targets.generate-from-reference C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:1129: in generate-dependencies C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:1179: in object(alias-target-class)(a)76.generate C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:742: in generate-really C:/JOHN/hvm/src/boost/tools/build/v2/build\targets.jam:715: in object(main-target)(a)133.generate C:/JOHN/hvm/src/boost/tools/build/v2\build-system.jam:663: in load C:\JOHN\hvm\src\boost\tools\build\v2/kernel\modules.jam:267: in import C:\JOHN\hvm\src\boost\tools\build\v2/kernel/bootstrap.jam:134: in boost-build C:\JOHN\hvm\src\boost\boost-build.jam:11: in module scope It looks like an issue crept into the jam file recently because it _used_ to work. Any help here would be great! Thanks, John

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boost::serialization - trying to serialize derived class and base class.
by j.c. 15 Apr '08

15 Apr '08

I am writing a packet base class that can be serialized. The class so far looks like: class packet_base { using namespace boost; public: packet_base(); ~packet_base(); friend class boost::serialization::access; template <typename Archive> void serialize(Archive & ar, const unsigned int version) { ar & m_length; ar & m_type; ar & m_method; } private: uint16_t m_length; uint16_t m_type; uint16_t m_method; }; The question now is how can I derive class A from packet_base and have both packet_base and A's variables serialized? Obviously base_class needs to be archived first so it's variables are at the front of the buffer. Thanks in advance. J

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Problem building serialization with gcc mingw 3.4.5
by Markus Svilans 14 Apr '08

14 Apr '08

Dear mailing list, I am having some trouble building Boost 1.35.0, using gcc mingw 3.4.5. When building the serialization library, I get the following error message on many of the files: "wide char i/o not supported on this platform" The bjam command line I used is: bjam --build-dir="C:\boost_1_35_0\built" --toolset=gcc --with-serialization I've looked through some of the Boost configuration header files, and it seems that the BOOST_NO_STD_WSTREAMBUF value is not being #defined. (I was under the impression that gcc mingw 3.4.5 supports wide character i/o, is this correct?) Has anyone else had this problem, and is there a solution to getting serialization to build properly using my gcc compiler? Thanks very much, Markus.

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boost.exception errors
by Olaf Peter 14 Apr '08

14 Apr '08

Hi, I've used the boost.exception from svn (Revision 44352) and got the compile errors: $ LANG=en g++ -I ../../3rd_party/boost-svn/ -Wall eh.cpp -o eh && ./eh ../../3rd_party/boost-svn/boost/exception/info.hpp: In function 'boost::shared_ptr<const typename ErrorInfo::value_type> boost::get_error_info(const E&) [with ErrorInfo = boost::error_info<boost::tag_throw_function, const char*>, E = boost::exception]': eh.cpp:21: instantiated from here ../../boost-svn/boost/exception/info.hpp:104: error: no matching function for call to 'boost::shared_ptr<const char* const>::shared_ptr(boost::shared_ptr<const boost::exception_detail::error_info_base>&, const char* const*)' /usr/include/boost/shared_ptr.hpp:144: note: candidates are: boost::shared_ptr<T>::shared_ptr() [with T = const char* const] /usr/include/boost/shared_ptr.hpp:131: note: boost::shared_ptr<const char* const>::shared_ptr(const boost::shared_ptr<const char* const>&) from this file: #include <boost/exception/exception.hpp> #include <boost/exception/info_tuple.hpp> #include <boost/exception/info.hpp> #include <exception> #include <boost/shared_ptr.hpp> #include <iostream> struct test_exception : boost::exception {}; int main() { try { throw test_exception() << BOOST_ERROR_INFO ; } catch( const boost::exception& e ) { using namespace boost; std::cerr << "Caught exception:\n" << e.what() << "\n"; shared_ptr<const char * const> function = get_error_info<throw_function>( e ); // shared_ptr<const char * const> file = get_error_info<throw_file>( e ); // shared_ptr<int* const> line = get_error_info<throw_line>( e ); // std::cerr << " in " << file << "(" << line << "): " << function << std::endl; } } BTW, the example_io.cpp doesn't compile too. Do I have to use the complete svn trunk? Thanks, Olaf

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[serialization] 1.35 problem with explicit instantiation
by Dan Thill 14 Apr '08

14 Apr '08

With 1.34, I was using the pattern described by Robert (http://lists.boost.org/boost-users/2006/01/16293.php) with non-intrusive serialization. In short, the serialization functions are merely declared in the header files. They are implemented in the .cpp file, and then explicitly instantiated for each archive type I'm using. However, with 1.35, this no longer works. The export macros create an instance of the guid initializer as follows: export.hpp:150 BOOST_PP_CAT(boost_serialization_guid_initializer_, __LINE__) However, this gives me redefinition errors in the following situaion: ClassA.h -------- (line 1:) BOOST_CLASS_EXPORT(ClassA); ClassB.h -------- (line 1: )BOOST_CLASS_EXPORT(ClassB); main.cpp #include <ClassA.h> #include <ClassB.h> (create an archive instance and attempt to serialize) ------------------------------- As you can see, two objects, both named boost_serialization_guid_initializer_1, will be created, and the compiler (MSVC80) will give me a redefinition error. I honestly have no idea what's going on. This is so obvious, it has to mean that I'm organizing my code in some weird fashion. Thanks! Dan

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Re: [Boost-users] [boost] [gil] [announcement] New IO lib
by Christian Henning 14 Apr '08

14 Apr '08

This is my bad. Sorry. It's basically the same address without the 's' in https. Here it is again: http://gil-contributions.googlecode.com/svn/trunk/gil_2/boost/gil/extension… Christian

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[Boost.Test] reports incorrect memory leak
by mike 14 Apr '08

14 Apr '08

An extremely simple piece test, containing just one stack-created object, is causing boost.test to report a memory leak. I am using boost 1.34.1 compiled in windows using configure, bjam, & msvc90. I've copied my simple test case illustrating my problem below, and included the output it produces. As you can see, boost.test is being used, but the regex is part of microsoft's tr1. As a note, when I modify it to use boost's regex (with the commented-out changes seen in code), no such errors were reported. I'd like to say that obviously the SOLE problem lies in MS' beta tr1 implementation, but this code is so simple I don't get how that would be. Also, i believe the actual TR1 impl is from dinkumware and is supposed to be fully release ready (it is just the ms-CLI, etc, integration which leads to the beta designation)... Hopefully someone has more insight into this. Also, if someone has any tips on how to interpret the memory dump boost.test provides, I'd be interested in learning. Thanks in advance! //begin code// //file dumb_test.cpp //in a new, default solution w/ precompiled headers turned off, //all msvc files removed, and include_path += $(boost_root) //lib_path += $(boost_root)/stage/lib added #include <boost/test/unit_test.hpp> #include <regex> //#include <boost/tr1/tr1/regex> using boost::unit_test_framework::test_suite; using std::tr1::regex; //using boost::regex void dumb_test(){ regex rgx(""); //regex rgx("foo");//boost doesn't like empty rgx str } test_suite* init_unit_test_suite(int, char** const){ test_suite* suite = BOOST_TEST_SUITE("Core Tests"); suite->add(BOOST_TEST_CASE(&dumb_test)); return suite; } //end code// //begin output// Running 1 test case... *** No errors detected Detected memory leaks! //with boost::regex no mem leaks... Dumping objects -> {208} normal block at 0x00347DD8, 20 bytes long. Data: <p-J > 70 2D 4A 00 15 00 00 00 00 00 00 00 00 00 00 00 {207} normal block at 0x00347D90, 24 bytes long. Data: <|-J }4 > 7C 2D 4A 00 0E 00 00 00 00 00 00 00 D8 7D 34 00 {206} normal block at 0x00347D48, 24 bytes long. Data: < -J }4 > 88 2D 4A 00 0D 00 00 00 00 00 00 00 90 7D 34 00 {205} normal block at 0x00347CF8, 32 bytes long. Data: <p-J H}4 > 70 2D 4A 00 14 00 00 00 00 00 00 00 48 7D 34 00 Object dump complete. //end output//

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bind with boost::filesystem::directory_iterator
by Brad 14 Apr '08

14 Apr '08

Hi guys and gals, I'm new to boost and this is my first attempt to use bind (big step LOL). I'm trying to do this: bfs::path p( "." ); bfs::directory_iterator dir_iter( p ); for_each( dir_iter.begin(), dir_iter.end(), boost::bind( &purgeOlder, _1 ) ) but I get: purgefiles.cpp:53: error: 'class boost::filesystem::directory_iterator' has no member named 'begin' purgefiles.cpp:53: error: 'class boost::filesystem::directory_iterator' has no member named 'end' It would appear directory_iterator does not have these members which are common on the other containers, am I missing something? Is there a way to do this using bind? Cheers, Brad

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ptr_map trouble
by Pau Garcia i Quiles 14 Apr '08

14 Apr '08

Hello, I'm having trouble when adding elements to a ptr_map. If I use a ptr_vector instead, it works (code for ptr_map and ptr_vector follows). * With ptr_map: =============== #include <iostream> #include <string> #include <boost/function.hpp> #include <boost/any.hpp> #include <boost/ptr_container/ptr_map.hpp> class Base { }; class X : public Base { public: std::string text() { std::cout<< std::string("hello world!") << std::endl; return std::string("hello world!"); } }; class Y : public Base { public: int value() { return 5; } }; class Z : public Base { public: bool isEnabled() { return true; } }; // [...] // There will be hundreds of classes like X, Y and Z, only quite more complex class ProxyBase { public: virtual boost::any field() = 0; }; template<class T> class Proxy : public ProxyBase { typedef T result_type; public: Proxy(T& inst, boost::function<boost::any ( T )> f) : inst_(inst), f_(f) { ; }; boost::any field() { return boost::any( f_(inst_) ); } T& inst_; boost::function<boost::any ( T )> f_; }; int main() { boost::ptr_map<std::string, ProxyBase> m; X x; Proxy<X>* px = new Proxy<X>(x, boost::mem_fn(&X::text)); std::cout << "Calling a proxy object Proxy<X> outputs: " << boost::any_cast<std::string>( px->field() ) << std::endl; // m.insert(std::string("test"), px ); // FIXME Why does this 'insert' fail? // std::cout << "PTR_MAP Calling a proxy object Proxy<X> outputs: " << boost::any_cast<std::string>( m["test"].field() ) << std::endl; Y y; Proxy<Y>* py = new Proxy<Y>(y, boost::mem_fn(&Y::value)); std::cout << "Calling a proxy object Proxy<Y> outputs: " << boost::any_cast<int>( py->field() )<< std::endl; // m.insert(std::string("test2"), py); // FIXME Why does this 'insert' fail? // std::cout << "PTR_VECTOR Calling a proxy object Proxy<Y> outputs: " << boost::any_cast<int>( m["test2"].field() ) << std::endl; Z z; Proxy<Z>* pz = new Proxy<Z>(z, boost::mem_fn(&Z::isEnabled)); std::cout << "Calling a proxy object Proxy<Z> outputs: " << boost::any_cast<bool>( pz->field() )<< std::endl; // m.insert(std::string("test3"), pz); // FIXME Why does this 'insert' fail? // std::cout << "PTR_VECTOR Calling a proxy object Proxy<Z> outputs: " << boost::any_cast<bool>( m["test3"].field() ) << std::endl; return 0; } * With ptr_vector: ================== #include <iostream> #include <string> #include <boost/function.hpp> #include <boost/any.hpp> #include <boost/ptr_container/ptr_vector.hpp> class Base { }; class X : public Base { public: std::string text() { std::cout<< std::string("hello world!") << std::endl; return std::string("hello world!"); } }; class Y : public Base { public: int value() { return 5; } }; class Z : public Base { public: bool isEnabled() { return true; } }; // [...] // There will be hundreds of classes like X, Y and Z, only quite more complex class ProxyBase { public: virtual boost::any field( std::string name ) = 0; }; template<class T> class Proxy : public ProxyBase { typedef T result_type; public: Proxy(std::string name, T& inst, boost::function<boost::any ( T )> f) : name_(name), inst_(inst), f_(f) { ; }; boost::any field( std::string name ) { if( name == name_ ) { // Just a stub to simulate a container lookup return boost::any( f_(inst_) ); } } std::string name_; T& inst_; boost::function<boost::any ( T )> f_; }; int main() { boost::ptr_vector<ProxyBase> vec; X x; Proxy<X>* px = new Proxy<X>("test", x, boost::mem_fn(&X::text)); vec.push_back(px); std::cout << "Calling a proxy object Proxy<X> outputs: " << boost::any_cast<std::string>( px->field("test") ) << std::endl; std::cout << "PTR_VECTOR Calling a proxy object Proxy<X> outputs: " << boost::any_cast<std::string>( vec[0].field("test") ) << std::endl; Y y; Proxy<Y>* py = new Proxy<Y>("test2", y, boost::mem_fn(&Y::value)); vec.push_back(py); std::cout << "Calling a proxy object Proxy<Y> outputs: " << boost::any_cast<int>( py->field( "test2" ) )<< std::endl; std::cout << "PTR_VECTOR Calling a proxy object Proxy<Y> outputs: " << boost::any_cast<int>( vec[1].field("test2") ) << std::endl; Z z; Proxy<Z>* pz = new Proxy<Z>("test3", z, boost::mem_fn(&Z::isEnabled)); vec.push_back(pz); std::cout << "Calling a proxy object Proxy<Z> outputs: " << boost::any_cast<bool>( pz->field( "test3" ) )<< std::endl; std::cout << "PTR_VECTOR Calling a proxy object Proxy<Z> outputs: " << boost::any_cast<bool>( vec[2].field("test3") ) << std::endl; return 0; } -- Pau Garcia i Quiles http://www.elpauer.org (Due to my workload, I may need 10 days to answer)

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