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Searching through a vector of tuples...
by Graham Reitz 15 Aug '07

15 Aug '07

typedef boost::tuples::tuple<int,double> some_tuple; std::vector<some_tuple> vec_of_some_tuples; // ... stuff some data into the vector // ... search for a specific int in the vector of some_tuple What would be a good method, using an stl algorithm, to search through the vector above to match only the int portion of the tuple (ignoring the double)? Thanks, Graham

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boost.test and independent compilation/running of tests
by Alexander Schmolck 15 Aug '07

15 Aug '07

Hi, I'm trying to figure out what the best way to use boost.test to achieve something close to TDD (test driven development) is; I should presumably also mention that I'm using qmake and not bjam as a build utility. I've managed to build and use boost.test fine (after figuring out that I needed to add -DBOOST_TEST_DYN_LINK), but what I haven't been able to achieve is to a) have several smaller test-cases/suites for TDD so that I can rapidly recompile and run a small subset of tests whilst I'm developing a specific class. b) have one big test-suite, integrating all the above, for regression testing to be run periodically (after the above subset of tests passed; on svn commit etc.) I haven't figured out how to set things up so that I can compile individual tests to .o files and then either simply build a complete regression suite executable from them or an executable from just one (or a few) of these tests; because I don't know how to use the autoregistration facilities without ending up with multiple main()s. My test files currently look something like this: //file foo_test.cpp #define BOOST_TEST_MODULE foo_test #include <boost/test/unit_test.hpp> #include "foo.h" // Test Suite BOOST_AUTO_TEST_SUITE(foo_test_suite); BOOST_AUTO_TEST_CASE(some_test_case) { // ... } BOOST_AUTO_TEST_SUITE_END(); What's the recommended way to go about this? thanks, 'as

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hash_multimap serialization issue
by Lorenzo Cavallaro 15 Aug '07

15 Aug '07

Dear Boost list, I'm trying to use the boost serialization class to serialize some objects. Unfortunately, I keep running into the same issue (compilation error) that I report here below for clarity $ g++-3.4 -fPIC -O2 -g -I. -c model.cpp -o model.o /usr/include/boost/serialization/access.hpp: In static member function +`static void boost::serialization::access::serialize(Archive&, T&, unsigned +int) [with Archive = boost::archive::text_oarchive, T = +__gnu_cxx::hash_multimap<addr_t, Events*, __gnu_cxx::hash<unsigned int>, +eqaddr, std::allocator<Events*> >]': /usr/include/boost/serialization/serialization.hpp:81: instantiated from `void +boost::serialization::serialize(Archive&, T&, unsigned int) [with Archive = +boost::archive::text_oarchive, T = __gnu_cxx::hash_multimap<addr_t, Events*, +__gnu_cxx::hash<unsigned int>, eqaddr, std::allocator<Events*> >]' /usr/include/boost/serialization/serialization.hpp:140: instantiated from +`void boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with +Archive = boost::archive::text_oarchive, T = __gnu_cxx::hash_multimap<addr_t, +Events*, __gnu_cxx::hash<unsigned int>, eqaddr, std::allocator<Events*> >]' /usr/include/boost/archive/detail/oserializer.hpp:148: instantiated from `void +boost::archive::detail::oserializer<Archive, +T>::save_object_data(boost::archive::detail::basic_oarchive&, const void*) +const [with Archive = boost::archive::text_oarchive, T = +__gnu_cxx::hash_multimap<addr_t, Events*, __gnu_cxx::hash<unsigned int>, +eqaddr, std::allocator<Events*> >]' model.cpp:599: instantiated from here /usr/include/boost/serialization/access.hpp:109: error: 'class +__gnu_cxx::hash_multimap<addr_t, Events*, __gnu_cxx::hash<unsigned int>, +eqaddr, std::allocator<Events*> >' has no member named 'serialize' make: *** [model.o] Error 1 I've looked for this error on Internet and I found out that a discussion on the boost mailing list dated back on 2005 (http://lists.boost.org/boost-users/2005/08/13183.php) I tried making those changes but nothing happened and I still have the reported compilation error. For the sake of clarity, here's a snippet of the code I'm trying to compile #include <boost/archive/text_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/utility.hpp> #include <boost/serialization/list.hpp> #include <boost/serialization/vector.hpp> #include <boost/serialization/hash_map.hpp> #include <ext/hash_map> using namespace std; using namespace __gnu_cxx; struct eqaddr { bool operator()(addr_t ret1, addr_t ret2) const { return ret1 == ret2; } }; typedef hash_multimap<addr_t, Events *, hash<addr_t>, eqaddr> model_t; class ModelMap { friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int file_version) { ar & map; } public: model_t map; ModelMap() { } ~ModelMap() { } }; I'm using libboost-serialization 1.33.1-10 (debian) Any idea on how to fix this? Am I doing something wrong? TIA, bye Lorenzo -- Lorenzo `Gigi Sullivan' Cavallaro <sullivan(a)security.dico.unimi.it> GPG key at http://security.dico.unimi.it/~sullivan/sullivan.asc Until I loved, life had no beauty; I did not know I lived until I had loved. (Theodor Korner) See the reality in your eyes, when the hate makes you blind. (A.H.X)

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How to import a dll to python
by desai3＠cooper.edu 14 Aug '07

14 Aug '07

Hi all: I am completely new to Python and Boost.python. (I have been using it for two days) I was trying out a tutorial example that is located in the boost_1_34_1\libs\example\tutorial folder of the standard Boost distribution. After running ./Bjam target-os=cygwin toolset = gcc it created hello.dll, hello.dll.a and hello.o files in boost_1_34_1\libs\python\example\tutorial\bin\gcc-3.4.4\debug. However, when I go to python and use "import python" it gives me following error ######################################## Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named hello ######################################## What am I doing wrong? I am completely new to this boost and python so simplified answers will help a lot. Thank you

2 3

any_cast on polymoprhic types?
by Gross, Steve 14 Aug '07

14 Aug '07

Is there a way to use any_cast for polymorphic types? For instance, let's say I've got a Base class and a Derived class. I want to be able to any_cast a Derived * to a Base * successfully, like so: class Base { virtual ~Base() {} }; class Derived : public Base { virtual ~Derived() {} }; Derived d; boost::any a = &d; boost::any_cast<Base*>(a); // Will NOT throw an exception Thanks! --Steve

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ptr_map<int, T> where T has no default constructor because its private members are const
by e r 14 Aug '07

14 Aug '07

hi, i can build a map<int,A*>, but not a boost::ptr_map<unsigned int,A>. could someone please help? thank you, e. #include <boost/ptr_container/ptr_map.hpp> using std::map; using std::cout; using std::endl; class A{ public: A(double x_):x(x_){}; const double x; }; int main(){ map<int,A*> map_A; //cannot use map<int,A> //because A() not defined //why? because A has const members. A a(0.0); map_A[0]=new A(0.0);//fine boost::ptr_map<unsigned int,A> ptr_map_A; ptr_map_A[0]=new A(0.0);//not fine return 0; }; **** Build of configuration Debug for project testing_map **** make -k all Building file: ../main.cpp Invoking: GCC C++ Compiler g++ -I/usr/local/boost_1_34_1 -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"main.d" -MT"main.d" -o"main.o" "../main.cpp" ../main.cpp:25:3: warning: no newline at end of file ../main.cpp: In function ‘int main()’: ../main.cpp:22: error: no match for ‘operator=’ in ‘ptr_map_A.boost::ptr_map<unsigned int, A, std::less<unsigned int>, boost::heap_clone_allocator, std::allocator<std::pair<const unsigned int, void*> > >::<anonymous>.boost::ptr_map_adapter<A, std::map<unsigned int, void*, std::less<unsigned int>, std::allocator<std::pair<const unsigned int, void*> > >, boost::heap_clone_allocator>::<anonymous>.boost::ptr_container_detail::ptr_map_adapter_base<T, VoidPtrMap, CloneAllocator>::operator[] [with T = A, VoidPtrMap = std::map<unsigned int, void*, std::less<unsigned int>, std::allocator<std::pair<const unsigned int, void*> > >, CloneAllocator = boost::heap_clone_allocator](((const unsigned int&)((const unsigned int*)(&0u)))) = (((A*)operator new(8u)), (<anonymous>->A::A(0.0), <anonymous>))’ ../header.h:4: note: candidates are: A& A::operator=(const A&) /usr/local/boost_1_34_1/boost/ptr_container/ptr_map_adapter.hpp: In member function ‘typename boost::ptr_container_detail::associative_ptr_container<boost::ptr_container_detail::map_config<T, VoidPtrMap>, CloneAllocator>::reference boost::ptr_container_detail::ptr_map_adapter_base<T, VoidPtrMap, CloneAllocator>::insert_lookup(const typename boost::ptr_container_detail::associative_ptr_container<boost::ptr_container_detail::map_config<T, VoidPtrMap>, CloneAllocator>::key_type&) [with T = A, VoidPtrMap = std::map<unsigned int, void*, std::less<unsigned int>, std::allocator<std::pair<const unsigned int, void*> > >, CloneAllocator = boost::heap_clone_allocator]’: /usr/local/boost_1_34_1/boost/ptr_container/ptr_map_adapter.hpp:268: instantiated from ‘typename boost::ptr_container_detail::associative_ptr_container<boost::ptr_container_detail::map_config<T, VoidPtrMap>, CloneAllocator>::reference boost::ptr_container_detail::ptr_map_adapter_base<T, VoidPtrMap, CloneAllocator>::operator[](const typename boost::ptr_container_detail::associative_ptr_container<boost::ptr_container_detail::map_config<T, VoidPtrMap>, CloneAllocator>::key_type&) [with T = A, VoidPtrMap = std::map<unsigned int, void*, std::less<unsigned int>, std::allocator<std::pair<const unsigned int, void*> > >, CloneAllocator = boost::heap_clone_allocator]’ ../main.cpp:22: instantiated from here /usr/local/boost_1_34_1/boost/ptr_container/ptr_map_adapter.hpp:168: error: no matching function for call to ‘A::A()’ ../header.h:6: note: candidates are: A::A(double) ../header.h:4: note: A::A(const A&) make: *** [main.o] Error 1 make: Target `all' not remade because of errors. Build complete for project testing_map

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[program_options] Short name strategy
by Larry 14 Aug '07

14 Aug '07

I didn't see anythiing in the doc but is there some compelling reason why short names for options was limited to a single character? The code fails an assert if the short name is more than one character. It just seems like an unnecessary limitation. Larry

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Meaning of a library suffix
by Philippe Mondon 14 Aug '07

14 Aug '07

Hi, Can anyone tell me what means the library suffix : *sgd-*.lib My code on windows wants to link with this library and I don't understand why. Thanks, Regards, Philippe Mondon Equipe PAC/Architecture DIMC Calyon Ce message et ses pièces jointes (le "message") est destiné à l'usage exclusif de son destinataire. Si vous recevez ce message par erreur, merci d'en aviser immédiatement l'expéditeur et de le détruire ensuite. Le présent message pouvant être altéré à notre insu, CALYON Crédit Agricole CIB ne peut pas être engagé par son contenu. Tous droits réservés. This message and/or any attachments (the "message") is intended for the sole use of its addressee. If you are not the addressee, please immediately notify the sender and then destroy the message. As this message and/or any attachments may have been altered without our knowledge, its content is not legally binding on CALYON Crédit Agricole CIB. All rights reserved.

2 2

[program_options] how to link to the release version of static library
by 顾铭秋 14 Aug '07

14 Aug '07

Hi, I'm using Boost 1.34.1 with MS VC8. Release version of my project will link to the debug version of static library (libboost_program_options-vc80-mt-sgd-1_34_1.lib). This will cause some link error (symbol redefinition in debug and release version of system library). How can I link to the release version of the library(libboost_program_options-vc80-mt-s-1_34_1.lib)? Thanks! MQ Gu

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Re: [Boost-users] [tests] Signals not well covered in unit tests (incontrast to exceptions)?
by Gennadiy Rozental 14 Aug '07

14 Aug '07

> "Jens Seidel" <jensseidel(a)users.sf.net> wrote in message > news:20070726151640.GA19199@imkf-pc073.imkf.tu-freiberg.de... > Hi, > > I have the following problem with a C++ project on Linux using the > Boost.test framework: Can you write simple example that show the problem? Gennadiy

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boost test documentation update.
by Yann Golanski 14 Aug '07

14 Aug '07

Is there an ETA to the Boost test documentation update? At the moment, the documentation is rather poor which is a shame since the library is good. -- yann(a)kierun.org -= H+ =- www.kierun.org PGP: 009D 7287 C4A7 FD4F 1680 06E4 F751 7006 9DE2 6318

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Spirit - Cannot get my actors straight
by Anders Dalvander 14 Aug '07

14 Aug '07

Hi, I'm trying to create a parser that shall create a number of derived classes based on the input, put it in a shared_ptr<Base> and push_back to a vector. Example: "Alpha" => vec.push_back(shared_ptr<Base>(new Alpha())) "Beta[1]" => vec.push_back(shared_ptr<Base>(new Beta(1))) "Gamma[2-3]" => vec.push_back(shared_ptr<Base>(new Gamma(2, 3))) "Gamma[4-End]" => vec.push_back(shared_ptr<Base>(new Gamma(4))) I've defined the actor as [push_back_a(self.vec, BasePtr(new Alpha()))], but that obviously doesn't work as BasePtr(new Alpha()) creates a temporary shared_ptr that will be destroyed by the end of the statement. How can I delay the creation of the shared_ptr, and how can I delay the new statement? Using Boost 1.34.1, MSVC++ 2005. Thanks, Anders Dalvander #include <vector> #include <boost/optional.hpp> #include <boost/shared_ptr.hpp> #include <boost/spirit.hpp> #include <boost/spirit/actor/push_back_actor.hpp> #include <boost/spirit/phoenix.hpp> using namespace boost::spirit; using namespace phoenix; class Base { public: virtual ~Base() = 0 {} }; typedef boost::shared_ptr<Base> BasePtr; class Alpha : public Base { public: Alpha() {} virtual ~Alpha() {} }; class Beta : public Base { public: explicit Beta(int var) : var(var) {} virtual ~Beta() {} private: int var; }; class Gamma : public Base { public: explicit Gamma(int var1) : var1(var1), var2() {} Gamma(int var1, int var2) : var1(var1), var2(var2) {} virtual ~Gamma() {} private: int var1; boost::optional<int> var2; }; struct my_grammar : grammar<my_grammar> { template <typename ScannerT> struct definition { typedef rule<ScannerT> rule_t; explicit definition(const my_grammar& self) { my_rule = str_p("Alpha")[push_back_a(self.vec, BasePtr(new Alpha()))] | ("Beta[" >> int_p[var(var1) = arg1] >> "]")[push_back_a(self.vec, BasePtr(new Beta(var1)))] | ("Gamma[" >> int_p[var(var1) = arg1] >> "-" >> int_p[var(var2) = arg1] >> "]")[push_back_a(self.vec, BasePtr(new Gamma(var1)))] | ("Gamma[" >> int_p[var(var1) = arg1] >> "-End]")[push_back_a(self.vec, BasePtr(new Gamma(var1)))] ; } int var1; int var2; rule_t my_rule; const rule_t& start() const { return my_rule; } }; my_grammar(std::vector<BasePtr>& vec) : vec(vec) { } std::vector<BasePtr>& vec; }; int main() { std::vector<BasePtr> vec; my_grammar g(vec); parse("Alpha", g); parse("Beta[1]", g); parse("Gamma[2-3]", g); parse("Gamma[4-End]", g); }

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[statechart] orthogonal states in state_machine?
by Chris Paulse 13 Aug '07

13 Aug '07

I would like to create a state_machine class that contains some context information that can be written by orthogonal<0> and read by orthogonal<1>. Graphically: _______________ | State Machine | |_______________|______________ | | | StateA1 <------> StateA2 | | - - - - - - - - - - - - - - | | StateB1 <------> StateB2 | |_______________________________| I declare using struct StateA1, StateB1; struct MyStateMachine : sc::state_machine< MyStateMachine, mpl::list<StateA1, StateB1> > {}; struct StateA1 : sc::simple_state<StateA1, MyStateMachine::orthogonal<0> > {}; but get a compile error on line 2 as "orthogonal not a member of MyStateMachine". Do I need to declare one state in MyStateMachine, and make the mpl::list a second template argument to it in order to get what I want? Thanks in advance, Chris

2 1

mpl question: object hierarchies
by Gross, Steve 13 Aug '07

13 Aug '07

Is there a way to use the mpl to determine if an object can be converted to some parent / child class? That is, if A derives from B, can I say something like "mpl::is_convertible_to<A, B>::value" ? Thanks, --Steve

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[ScopeExit/Typeof] Can't build simple test in debug mode (MSVC 7.1 and 8.0)
by Christian Larsen 13 Aug '07

13 Aug '07

Hi, I'm trying build a very simple test program using ScopeExit (just downloaded from the link in the review notice: http://boost-consulting.com/vault/index.php?action=downloadfile&filename=sco pe_exit-0.04.tar.gz&directory=& ). I'm using a brand new download of Boost 1.34.1 with it. The following code builds and runs fine in release mode in both VC7.1 and 8.0, but fails to build in debug mode in both versions. I also tried specifying the BOOST_TYPEOF_COMPLIANT in MSVC7.1 debug but to no avail - I just get some other errors. I couldn't find any indication of what would cause this difference between debug/release builds. I tried disabling optimizations in release mode to check whether this would cause release mode to fail, too, but it didn't. Any help would be appreciated. Best regards, Christian Larsen Code: #include <iostream> #include <boost/scope_exit.hpp> int main(int argc, char* argv[]) { bool commit = false; BOOST_SCOPE_EXIT( (commit) ) { if( !commit ) std::cerr << "Not committed!\n"; } BOOST_SCOPE_EXIT_END //commit = true; return 0; } Building debug mode MSVC 7.1: Compiling... ScopeExitTest.cpp using native typeof d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2513: 'boost::type_of::msvc_typeid_wrapper<ID>::type' : no variable declared before '=' with [ ID=5 ] d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2039: 'type' : is not a member of 'operator``global namespace''' d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2440: 'type cast' : cannot convert from 'long' to 'boost::type_of::msvc_typeid_wrapper<ID>::type' with [ ID=5 ] No constructor could take the source type, or constructor overload resolution was ambiguous d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2146: syntax error : missing ';' before identifier 'type' d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2065: 'type' : undeclared identifier d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2146: syntax error : missing ';' before identifier 'commit_boost_scope_exit_typeof' [...] Building debug mode MSVC 7.1 (with BOOST_TYPEOF_COMPLIANT): Compiling... ScopeExitTest.cpp using typeof emulation d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2440: 'type cast' : cannot convert from 'long' to 'main::commit_boost_scope_exit_nested_typeof' Source or target has incomplete type d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2143: syntax error : missing ';' before ':' d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2143: syntax error : missing ';' before ':' d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2143: syntax error : missing ';' before '{' d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2039: 'type' : is not a member of 'operator``global namespace''' d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2513: 'int' : no variable declared before '=' d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2146: syntax error : missing ';' before identifier 'type' d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2065: 'type' : undeclared identifier d:\Development\Misc\ScopeExitTest\ScopeExitTest.cpp(8) : error C2146: syntax error : missing ';' before identifier 'commit_boost_scope_exit_typeof' [...] Building debug mode MSVC 8.0: Compiling... ScopeExitTest.cpp using typeof emulation d:\development\misc\scopeexittest\scopeexittest.cpp(8) : error C2440: '<function-style-cast>' : cannot convert from 'long' to 'main::commit_boost_scope_exit_nested_typeof' Source or target has incomplete type d:\development\misc\scopeexittest\scopeexittest.cpp(8) : error C2143: syntax error : missing ';' before ':' d:\development\misc\scopeexittest\scopeexittest.cpp(8) : error C2143: syntax error : missing ';' before ':' d:\development\misc\scopeexittest\scopeexittest.cpp(8) : error C2143: syntax error : missing ';' before '{' d:\development\misc\scopeexittest\scopeexittest.cpp(8) : error C2039: 'type' : is not a member of '`global namespace'' d:\development\misc\scopeexittest\scopeexittest.cpp(8) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int d:\development\misc\scopeexittest\scopeexittest.cpp(8) : error C2513: 'int' : no variable declared before '=' d:\development\misc\scopeexittest\scopeexittest.cpp(8) : error C2146: syntax error : missing ';' before identifier 'type' [...]

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Boost Serialization with a dynamically loaded shared library
by Jeshua Bratman 13 Aug '07

13 Aug '07

I've been trying to get Boost serialization working for dynamically loaded shared libraries. Here's my basic structure simplified: 1. base.hpp - includes an abstract base class called base 2. derived.hpp - includes a derived class from base. includes base.hpp. 3. derived.cpp - includes code for derived class and for dynamically loading it 4. main.cpp - includes base.hpp but NOT derived.hpp. dynamically loads instantiates a base * which points to a derived object from derived.so Now in main I want to be able to serialize my pointer to the loaded derived class: base *obj = create_func(); //obj now points to a derived object obj->test(); //when test is run it correctly outputs the message from derived.cpp const base *to_serialize = obj; //it seems to want a const pointer in order to serialize std::ofstream ofs("filename"); boost::archive::text_oarchive oa(ofs); oa << (*to_serialize); main.cpp compiles fine, but when it gets to the last line there, the serialize method in base is called, not the one in derived. I read http://www.boost.org/libs/serialization/doc/serialization.html#derivedpoint… http://www.boost.org/libs/serialization/doc/serialization.html#derivedpoint… but it doesn't seem to address this problem (unless I missed something?). I can't use the BOOST_CLASS_EXPORT_GUID(derived, "derived") macro discussed on that page because main does not know what a derived object is (this is the whole point of having this plugin system). Is there any way I can make boost serialization correctly serialize the derived class from the base pointer when the derived object is known only to a dynamically loaded library? Thank you for your help, Jeshua Bratman -- View this message in context: http://www.nabble.com/Boost-Serialization-with-a-dynamically-loaded-shared-… Sent from the Boost - Users mailing list archive at Nabble.com.

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Re: [Boost-users] Regular expression min match length
by Raffaele Romito 13 Aug '07

13 Aug '07

Thanks for the reply John, I'll try to expose my "use case" with the hope this feature will be available in the future... I'm developing a system that detects TCP streams with a pattern matching, here is the pseudo code (in a simplified form) of the function I'd link to extend: protocol_stream decodeStream(tcp_stream) { foreach(registered protocol in the system) { required_size_to_match = calc_min_regex_len(current_protocol.regex); if(tcp_stream.buffer_size <= required_size_to_match) check if tcp_stream.buffer matches else try to read from tcp_stream if data is available until <required_size_to_match> and check again if matches } } Hope u can help since you have "an almost pathological interest in anything that can't be done" :) Thanks again _________________________________________________________________ C'è una nuova amica su Messenger… E' Doretta, vieni a conoscerla! http://www.doretta82.it/banner/index.html

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ScopeExit Review Begins Today
by Jody Hagins 13 Aug '07

13 Aug '07

The review period for Scope Exit Time Series, submitted by Alexander Nasonov, runs from Monday, August 13 until Wednesday, August 22. >From the documentation: Nowadays, every C++ developer is familiar with RAII technique. It binds resource acquisition and release to initialization and destruction of a variable that holds the resource. But there are times when writing a special class for such variable is not worth the effort. This is when ScopeExit macro comes into play. You put resource acquisition directly in your code and next to it you write a code that releases the resource. Note that ScopeExit uses PP macros and relies on Boost.Typeof. The latest version can is here: http://boost-consulting.com/vault/index.php?action=downloadfile&filename=sc… It's available also at http://tinyurl.com/2z6qg2 Online documentation is here: http://194.6.223.221/~nasonov/scope_exit-0.04/libs/scope_exit/doc/html/inde… >From the review guidelines here: http://boost.org/more/formal_review_process.htm ... Boost mailing list members are encouraged to submit Formal Review comments: * Publicly on the mailing list. * Privately to the Review Manager. Private comments to a library submitter may be helpful to her or him, but won't help the Review Manager reach a decision, so the other forms are preferred. What to include in Review Comments Your comments may be brief or lengthy, but basically the Review Manager needs your evaluation of the library. If you identify problems along the way, please note if they are minor, serious, or showstoppers. Here are some questions you might want to answer in your review: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? And finally, every review should answer this question: * Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. Thanks in advance to every for your participation in this review.

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[Lambda] Question about calling a member function inside a lambda construct
by Hendrik Belitz 13 Aug '07

13 Aug '07

Hello, I'm rather stucked in using lambda expressions for a presumably simple task. Suppose I have objects with a member function bool is_empty() const; stored in a vector: I want to count the number of objects for which their member functions returns false, which is simple, but not elegant to achieve by size_t sum = 0; for( Foo::const_iterator it = vec.begin(); it != vec.end(); ++it ) if ( it->is_empty() == false ) sum++; I want to exchange this for a lambda expression, and came up with the following after some thinking. for_each( begin(), end(), if_then( !(_1 ->* &GridCell::is_empty)(), var(sum)++ ) ); This is still wrong and leads to two error messages: error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lamb da::logical_action<Action>,boost::tuples::tuple<boost::lambda::lambda_functo r<T>>>> boost::lambda::operator !(const boost::lambda::lambda_functor<T> &)' : could not deduce template argument for 'const boost::lambda::lambda_functor<T> &' from 'boost::tuples::null_type' error C2675: unary '!' : 'boost::tuples::null_type' does not define this operator or a conversion to a type acceptable to the predefined operator Could anyone tell how to get this working? Regards Hendrik -- Hendrik Belitz ISD Software und Systeme GmbH Hauert 4 D - 44227 Dortmund Germany Fon: +49 (0)231/97 93-0 Fax: +49 (0)231/97 93-101 Mail: <mailto:hBelitz@isdcad.de> hBelitz(a)isdcad.de Internet: <http://www.isdcad.de/> www.isdcad.de Geschäftsführung: Günter Flassig (Vors.), Dr. Jörg Ruhwedel Sitz Dortmund, Amtsgericht Dortmund HRB 4601

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Fwd: Resizing a symmetric matrix
by Tinne De Laet 13 Aug '07

13 Aug '07

Hi, While using the most recent version of Boost (boost_1_34_1) I noticed some problems when resizing a symmetric matrix. I included a test program to illustrate the problems. (Recent SVN snapshots and boost 1.33 have the same problem) When executing I get the following error caused by resizing the symmetric matrix with the preserve option set to true: Resize ml to bigger size Check failed in file /home/fiep/sources/boost_1_34_1/boost/numeric/ublas/storage.hpp at line 196: i < size_ terminate called after throwing an instance of 'boost::numeric::ublas::bad_index' what(): bad index Aborted (core dumped) Note that are no problems when resizing normal matrices nor resizing symmetric matrices when the preserve option is set to false. When stepping into the program, it seems that something goes wrong with the indexing of the symmetric matrix. I suspect that problems are caused by the use of the matrix_resize_preserver routine which is called in case the preserve option is set to true. I think this routine is designed for normal matrices only and expects a matrix which is completely filled as opposed to a symmetric matrix in which only one triangle is filled. Do I use the library in a wrong way or might this be a BUG? Kind regards, Tinne De Laet _______________________________________ Tinne De Laet Department of Mechanical Engineering - PMA Katholieke Universiteit Leuven Celestijnenlaan 300B - bus 2420 3001 Heverlee Tel: +32 (0)16 32 25 33 http://people.mech.kuleuven.be/~tdelaet/ _______________________________________ Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm

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(no subject)
by Trigve Siver 13 Aug '07

13 Aug '07

Hi all, On gtkmm mailing was posted mail about using boost in gtkmm... Could someone post some info about API, ABI stability of boost? thanks Trigve mail from gtkmm list: //---------------------- Boost is not a stable API. If it ever declares API and ABI stability then we could use it. Using boost now would break already-installed applications and break compilation of applications when boost is upgraded. When parts of the Boost API become part of the official C++ standard then we would use that API where appropriate. For instance, we hope to port to a standard C++ signals API in the future. That API was largely based on libsigc++ anyway. On Mon, 2007-08-13 at 12:27 +0800, manphiz wrote: > Hi gtkmm developers: > > I'm a new-comer to gtkmm, who found gtkmm a ideal GUI toolkit based on > the philosophy of standard C++, which exactly matches my anticipation. > > On the other hand, glibmm/gtkmm is virtually a wrapper of gtk+ stuff, > which also has to reflect the interface of the original stuff. While > Boost is a well-known C++ library collection which has many overlaps in > many aspects with glibmm, such as smart pointer, thread support. > Recently, a feature request for weak pointer in glibmm and the recent > compose api proposed by Daniel Elstner are resemblances as > boost::weak_ptr and boost::format, which provide similar functionalities. > > Here's the question: whether to reuse Boost or to reinvent all needed > functionailities in glibmm? Though there seems a reluctance to use Boost > which already results in many reinvention in glibmm, I don't think it is > a good idea. Boost is becoming more and more widely used within C++ > community. To reinvent is simply a waste of resource, and may even > result in different design and implementation which will definitely > compromise the interoperability between Boost and gtkmm. With the fact > of gtk+ binding, I believe the existence of libsigc++ indicates > glibmm/gtkmm is not a zealot to become a strict binding with gtk+ stuff. > While Boost is indeed a much heavier library than libsigc++, it still > merits reusing in gtkmm. Moreover, many Boost stuff are going to become > part of C++0x, which means smart_ptr, threads, regex, etc. will become a > part of the language itself, which in turn will loose the need of some > stuff currently in glibmm. Due to the binding reality, it is impossible > to do everything in Boost, but some of them can benefit a lot. > > I wonder if such a migration to Boost is possible? A reimplementation > with gtkmm may be infeasible since it will destroy the binary > compatibility. Changing glibmm stuff to be a binding of Boost without > changing its interfaces sounds viable, which will ultimately save gtkmm > a lot of work in the long run. What do you think? > > _______________________________________________ > gtkmm-list mailing list > gtkmm-list(a)gnome.org > http://mail.gnome.org/mailman/listinfo/gtkmm-list -- murrayc(a)murrayc.com www.murrayc.com www.openismus.com _______________________________________________ gtkmm-list mailing list gtkmm-list(a)gnome.org http://mail.gnome.org/mailman/listinfo/gtkmm-list //---------------------- ____________________________________________________________________________________ Boardwalk for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games. http://get.games.yahoo.com/proddesc?gamekey=monopolyherenow

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Re: [Boost-users] boost::iostreams::gzip_compressor and multiplefiles
by John Reynolds 13 Aug '07

13 Aug '07

Yu can try zipios http://sourceforge.net/projects/zipios John Reynolds Aircraft Management Technologies Limited Registered in Ireland, No.337561 Registered office: 1 The Green, Malahide, Co.Dublin, Ireland Tel: + 353 1 8061000 Fax:+ 353 1 8061025 -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Jens Seidel Sent: 10 August 2007 13:22 To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] boost::iostreams::gzip_compressor and multiplefiles On Thu, Aug 09, 2007 at 11:38:58AM -0400, François Duranleau wrote: > On Thu, 9 Aug 2007, Robert Caldecott wrote: > >However, I want to create a single gzip file that contains multiple > >compressed > >files, each with a different filename. Does anyone know how to achieve > >this? > > I guess that when you uncompress the file (e.g. with gunzip), you want to > get all those named files in, well, different files? As far as I know, the > gzip format doesn't allow that (I could be wrong), hence the gzip'ed tar Right, it doesn't allow it and this is fine. Why should gzip allow archiving multiple files? It is a compressing program, not more. It's again the usual (and fine) Unix philosophy: one program for a simple task, combine/pipe multiple such simple programs to get more complex tasks done. This way you can also compress via gzip other archive formats, do not increase the code base of gzip and make compressing alone usable for other programs as well (which do not require tar). I would wish such a solution would be used on the proprietary systems which use ZIP as default archiver as well ... Jens _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Problem message Boost Code Blocks
by question boost 13 Aug '07

13 Aug '07

Hi, using Code Blocks i got the folowing message: ld.exe "Cannot find -lboost_filesystem-mgw-mt-s-l_33_l". So I did :cd /jam source location/ then I execute build.bat Then, i put the following variables: path=C:\Program Files\CodeBlocks\bin BOOST_BUILD_PATH=C:\Documents and Settings\Administrateur\Bureau\boost_1_33_1\boost_1_33_1\tools\build\v2 BOOST_ROOT=C:\Documents and Settings\src\boost But i get the message again. What is the right thing to do in order not to get the message any more? Thank you for your answer because nobody has ever answered this question yet. Thank You _________________________________________________________________ Le blog Messenger de Michel, candidat de la Nouvelle Star : analyse, news, coulisses… A découvrir ! http://michel-nouvelle-star2007.spaces.live.com/

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Regular expression min match length
by Raffaele Romito 13 Aug '07

13 Aug '07

Hi, I need to calculate, given a regular expression, the min length for a match. For example if I have as regexp ^HTTP.*, 4 is the min length required for a match. Is it possible? Plz help... Bye _________________________________________________________________ C'è una nuova amica su Messenger… E' Doretta, vieni a conoscerla! http://www.doretta82.it/banner/index.html

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Message Boost Code Blocks
by question boost 13 Aug '07

13 Aug '07

Hi, using Code Blocks i got the folowing message: ld.exe "Cannot find -lboost_filesystem-mgw-mt-s-l_33_l". So I did :cd /jam source location/then build.bat Then, i put the following variables: path=C:\Program Files\CodeBlocks\bin BOOST_BUILD_PATH=C:\Documents and Settings\Administrateur\Bureau\boost_1_33_1\boost_1_33_1\tools\build\v2 BOOST_ROOT=C:\Documents and Settings\src\boost It is not the right things to do => i get the message again. My question is: What are the right things to do in order not to get the message any more? Thank You _________________________________________________________________ Besoin d'un e-mail ? Créez gratuitement un compte Windows Live Hotmail et gagnez du temps avec l'interface à la Outlook ! http://www.windowslive.fr/hotmail/default.asp

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