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[Boost.Test] Where do you put the tests?
by Martin Trappel 05 May '08

05 May '08

Hello. We're in the process of setting up a better Unit Test environment with Boost.Test and are currently trying to figure out what's the best way to organize the tests. (As far as possible we'll work with BOOST_AUTO_TEST_... Makros) (As for our application: It consists of a few executables and like 200 dll modules.) So far I have come up with the following: * One Unit Test Module for the shared codebase (the library-like stuff) * One Unit Test Module for each module. (eg. for the module foo.exe I'll have a Unit Test Module ut_foo.exe to run the tests) * One Unit Test File (with one or more BOOST_AUTO_TEST_SUITE sections) for each source file in the application. (eg. for the file logging.cpp there will be one unit test file ut_logging.cpp) If anyone could share his experiences with Boost.Test and real life testing and how you set it up that would really be helpful. thanks, br, Martin

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[test] Confused about stuff...
by Robert Dailey 05 May '08

05 May '08

Hey guys, I'm currently in the process of researching Boost.Test. I've never used it before, and reading through the documentation for it and the various examples, I have a few questions I can't find the answers to. I'll post them below: 1. init_unit_test_suite is used fairly exclusively through the examples. The most I can gather is that this function begins the unit test. In other words, it calls other smaller functions which perform tests. How is this function evoked? 2. What is the difference in using init_unit_test_suite versus using #define BOOST_TEST_MAIN? 3. When creating a unit test as a console application in Visual Studio, I would of course be required to implement the normal int main() function, but what would I have to do inside of main() or WinMain() to begin the unit test? I never found any examples that showed this. If I think of more questions I'll be sure to post follow ups. Help is greatly appreciated. Thanks in advance!

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[test] Automating system("pause")
by Robert Dailey 05 May '08

05 May '08

Hi, Currently in Visual Studio, running a console application as a unit test results in the dialog immediately disappearing after it is done executing, regardless of success or failure. In both cases, I would like for the console dialog to pause, as it does with a call to system( "pause" );. Is there some preprocessor directive I can define to make this happen? Since Boost.Test is a framework, it is the responsibility of boost to do this. If it doesn't do it at all, I could just as easily go into the source code and add that logic myself if I need to. Help is appreciated.

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[test] User objects with BOOST_CHECK_EQUAL
by Robert Dailey 05 May '08

05 May '08

Hi, I'm having a bit of trouble getting user-defined objects working with Boost.Test. I skimmed through the docs and I didn't see anything on this subject, but the boost documentation isn't the most intuitive documentation, so it is a bit easy to miss obvious stuff like this. Anyway, I have a class named "Foo", and I've given it an overloaded boolean == operator. When I do the following, it fails to compile under MSVC9: Foo a, b; BOOST_TEST_EQUAL( a, b ); The class is defined as follows: class Foo { private: std::string data; public: Foo() : data( "Testing 123" ) {} Foo( Foo const& other ) { data = other.data; } bool operator== ( Foo const& operand ) { return data == operand.data; } }; Below is the error I'm getting. How can I make this work? I've truncated it a little bit since it's insanely long: 1>c:\it\tfs\crusades\sdks\boost\boost\test\test_tools.hpp(342) : error C2679: binary '<<' : no operator found which takes a right-hand operand of type 'const Foo' (or there is no acceptable conversion) 1> c:\program files\microsoft visual studio 9.0\vc\include\ostream(653): could be 'std::basic_ostream<_Elem,_Traits> &std::operator <<<char,std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const char *)' [found using argument-dependent lookup] 1> with 1> [ 1> _Elem=char, 1> _Traits=std::char_traits<char> 1> ] 1> c:\program files\microsoft visual studio 9.0\vc\include\ostream(700): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<char,std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,char)' [found using argument-dependent lookup] 1> with 1> [ 1> _Elem=char, 1> _Traits=std::char_traits<char> 1> ] 1> c:\program files\microsoft visual studio 9.0\vc\include\ostream(738): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const char *)' [found using argument-dependent lookup] 1> with 1> [ 1> _Elem=char, 1> _Traits=std::char_traits<char> 1> ]

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[Filesystem] remove_all is not documented, is it part of the API?
by Frank Birbacher 04 May '08

04 May '08

Hi! I'm using the Filesystem library. I wrote myself a function to recursively remove a directory. Afterwards I tried to take the address of "remove" in order to use it in an STL algorithm. It didn't compile. To resolve the problem I looked into the boost source code. And there I found a "remove_all" function. I wonder what it does because I'm in need for a recursive remove function. I scanned the filesystem documentation at http://www.boost.org/doc/libs/1_35_0/libs/filesystem/doc/reference.html but it does not contain "remove_all". Is the remove_all function part of the public API of Filesystem and was just forgotten in the docs? Or must I not use "remove_all"? Regards, Frank PS: And how do I get the address of the "remove<path>" function??

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mpl mutlimap
by Hicham Mouline 04 May '08

04 May '08

hello, as i don't immediately see an MPL equivalent of multimap, here is what i am trying to achieve. I have a number of models (200 types, all of them inherit from 1 base class) and a number of contracts(400 types, also all them inherit from 1 base class), and I try to write a test suite for valid combinations. Was there a multimap in MPL, i would have stored this matrix: model1 contract1, contract17, contract156 model2 contract17 ... model200 contract23 or symetrically, indexed by contract in a multimap. Are there solutions with other MPL sequences? Rds,

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Random Distribution
by Kevin Martin 04 May '08

04 May '08

I'm looking for a random distribution which allows me to generate enums with specified probabilities. As a simple example I could have: //The enum. typedef enum {vt_car, vt_bus, vt_walk, vt_cycle} vehicle_types; //What I want to generate and the associated probabilities. boost::array<vehicle_types, 4> items = {vt_car, vt_bus, vt_walk, vt_cycle}; boost::array<double, 4> probabilities = {0.1, 0.2, 0.3, 0.4} //The random distribution. EnumGenerator eg(items, probabilities); //Generate some vehicles boost::mt19937 rng; eg(rng); eg(rng); eg(rng); I can't seem to find anything that does this. Is it there and I'm just missing it, or am I the only person who needs to do this? Thanks, Kevin Martin

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Re: [Boost-users] [ASIO] destructor called multiple times in test code
by Jose Martinez 04 May '08

04 May '08

Frank, David, Nat, Thank you very much for the info. I picked up some good tips from ur responses. I made 'int d_count' a reference counter to find out how many copies are created and it went as high as 11; why so many? It would go that high in between iterations. I tried implementing the 'int count' member as a pointer, following Frank's advice, but I keep getting segmentation faults. If my copy constructor is as follows: print (const print& p): count(p.count),t(p.t){ std::cout<<"In copy. D_count:"<<++d_count<<"\n"; }//end copy constructor I get segmentation fault in the end: In copy. D_count:3 Count=2, D_count=2 Count=2, D_count=1 Count=2, D_count=0 Segmentation fault (core dumped) If my copy constructor is as follows: jose@jmart1:~/code/boost$ ./a.out I'm in constructor: 0 In copy. D_count:2 Segmentation fault (core dumped) I would have preferred copying the value, versus the address, in the copy constructor... in case the variable was deleted while references still existed to the class object. Here is the code: =========================================== class print{ int *count; boost::asio::deadline_timer* t; static int d_count; public: print (boost::asio::io_service& io, boost::asio::deadline_timer* timer) : t(timer) { d_count++; *count = 0; std::cout<<"I'm in constructor: "<<*count<<"\n"; t->async_wait(*this); }//end print ~print(){ std::cout << "Count=" << *count << ","; std::cout << " D_count=" << --d_count << "\n"; }//end ~print print (const print& p): count(p.count), t(p.t){ std::cout<<"In copy. D_count:"<<++d_count<<"\n"; //*count = *(p.count); causes segmentation fault right away }//end copy constructor void operator ()(const boost::system::error_code& /*e*/) const{ if (*count < 2){ std::cout << *count << "\n"; ++(*count); t->expires_at(t->expires_at() + boost::posix_time::seconds(1)); t->async_wait(*this); } }//end void operator() };//end class print int print::d_count = 0; int main(){ boost::asio::io_service io; boost::asio::deadline_timer t(io, boost::posix_time::seconds(1)); print p(io, &t); io.run(); return 0; } ====================================== Here is the output: I'm in constructor: 0 In copy. D_count:2 In copy. D_count:3 In copy. D_count:4 In copy. D_count:5 In copy. D_count:6 In copy. D_count:7 In copy. D_count:8 In copy. D_count:9 Count=0, D_count=8 Count=0, D_count=7 (skipping lines to save space) In copy. D_count:11 Count=2, D_count=10 Count=2, D_count=9 Count=2, D_count=8 Count=2, D_count=7 Count=2, D_count=6 Count=2, D_count=5 Count=2, D_count=4 Count=2, D_count=3 Count=2, D_count=2 In copy. D_count:3 In copy. D_count:4 In copy. D_count:5 In copy. D_count:6 In copy. D_count:7 Count=2, D_count=6 Count=2, D_count=5 Count=2, D_count=4 Count=2, D_count=3 Count=2, D_count=2 In copy. D_count:3 Count=2, D_count=2 In copy. D_count:3 Count=2, D_count=2 Count=2, D_count=1 Count=2, D_count=0 Segmentation fault (core dumped) thanks jose "survival first, then happiness as we can manage it" ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

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[ASIO] destructor called multiple times in test code
by Jose Martinez 04 May '08

04 May '08

OK I think I figured out the problem. I think I did something stupid. I can't just take an undefined pointer and assign a number to the address it is pointing to. class print{ int* count; boost::asio::deadline_timer* t; static int d_count; public: print (boost::asio::io_service& io, boost::asio::deadline_timer* timer) : t(timer) { d_count++; std::cout<<"I'm in constructor: "<<*count<<" Addr of count:"<<count<<"\n"; *count = 0; // DO NOT DO THIS I should have passed the value for count as an argument then assign its address to the member variable *count. Like this: class print{ int* count; boost::asio::deadline_timer* t; static int d_count; public: print (boost::asio::io_service& io, boost::asio::deadline_timer* timer, int *c) : t(timer), count(c) { d_count++; std::cout<<"I'm in constructor: "<<*count<<" Addr of count:"<<count<<"\n"; The copy constructor would then look like this. print (const print& p): t(p.t), count(p.count){++d_count;} This matches with what Frank was saying about managing the state of operator()() outside of the object. thanks! jose "survival first, then happiness as we can manage it" ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

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Queries of a Boost newbie
by ajay gopalakrishnan 03 May '08

03 May '08

Hi all, I have worked on C++ for a long time in the past, but then I stopped using C++ and moved to other languages like Java sheerly because I was facing portability and repeatability issues with my programs. However, with the advent of Boost, I am very excited to go back to C++ again. Boost looks like a pretty big package to easily go through and seems daunting at first to get used to using it. I have been trying to read the documentation and packages available, but it is proving to be a bit difficult to get started quickly. I work mainly in Machine Learning & Data Mining and this job mainly requires me to write very efficient and fast code for numerical processing programs as well as do a lot of data, especially text preprocessing. It would be great if you cant point to me some good packages in Boost for the following tasks. Packages that are very good and don't have a very steep learning curve. - Text Parsing. package that lets me do something like what Sed and Awk can do. - Linear Algebra - Eigen analysis, matrix operations, Matrix decomposition etc. - Optimization routines - Linear programming , Quadratic Programming etc. - HTML, XML parsing etc. Please do let me know if I am posting in the wrong forum. Thanks & Regards, Ajay Gopalakrishnan.

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[concept check] Documentation is out of sync
by Kimon Hoffmann 03 May '08

03 May '08

Hi all, I've just observed that a small part of the concept check documentation is out of sync with the current implementation. The page "Implementation" still uses the deprecated way of defining and checking concepts: http://www.boost.org/doc/libs/1_35_0/libs/concept_check/implementation.htm The rest of the pages seem to be up to date. Another small thing I noticed is that the page "Using Concept Checks" has the "Prev" and "Next" links at the bottom of the page switched compared to the other pages. http://www.boost.org/doc/libs/1_35_0/libs/concept_check/using_concept_check… Best regards, Kimon

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boost.graph topological_sort help
by James Sutherland 03 May '08

03 May '08

Can one use topological_sort with the following: typedef adjacency_list<listS, listS, directedS> Graph; typedef graph_traits<Graph>::vertex_descriptor Vertex; Graph g; // ... populate graph ... typedef vector<Vertex> SortVerts; SortVerts verts; topological_sort( g, std::back_inserter(verts) ); I currently have this working with a adjacency_list<vecS, vecS, directedS> graph but I need to use lists so that I don't run into trouble when I am removing vertices... Thanks for any advice, James

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[ASIO] destructor called multiple times in test code
by Jose Martinez 02 May '08

02 May '08

I was messing around with the ASIO timer examples, the examples that test out the asynch-timers. I was trying to remove the Bind calls from those examples. I stumbled on the following behavior. I created a class function object and overloaded the () operator and would call t->async_wait(*this); in the constructor. And t->expires_at(t->expires_at() + boost::posix_time::seconds(1)); t->async_wait(*this); in the operator() overload function. Anyways to make a long story short the destructor that should have only been called once, gets called multiple times, but the constructor gets called once. To make things even funnier, the destructor has no affect when changing the value on member objects. ================================== Here is the code: class print{ int count; boost::asio::deadline_timer* t; int d_count; public: print (boost::asio::io_service& io, boost::asio::deadline_timer* timer) :count(0), t(timer), d_count(0){ std::cout<<"I'm in constructor: "<<count<<"\n"; t->async_wait(*this); }//end print ~print(){ std::cout << "Count=" << count << ","; std::cout << " D_count=" << ++d_count << "\n"; }//end ~print void operator ()(const boost::system::error_code& /*e*/){ if (count < 2){ std::cout << count << "\n"; ++(count); t->expires_at(t->expires_at() + boost::posix_time::seconds(1)); t->async_wait(*this); } }//end void operator() };//end class print int main(){ boost::asio::io_service io; boost::asio::deadline_timer t(io, boost::posix_time::seconds(1)); print p(io, &t); io.run(); return 0; } ============================== Here is the output: jose@jmart1:~/code/boost$ ./a.out I'm in constructor: 0 Count=0, D_count=1 Count=0, D_count=1 Count=0, D_count=1 Count=0, D_count=1 Count=0, D_count=1 Count=0, D_count=1 Count=0, D_count=1 Count=0, D_count=1 Count=0, D_count=1 Count=0, D_count=1 Count=0, D_count=1 Count=0, D_count=1 Count=0, D_count=1 0 Count=1, D_count=1 Count=1, D_count=1 Count=1, D_count=1 Count=1, D_count=1 Count=1, D_count=1 Count=1, D_count=1 Count=1, D_count=1 Count=1, D_count=1 Count=0, D_count=1 Count=1, D_count=1 Count=1, D_count=1 Count=1, D_count=1 Count=1, D_count=1 Count=1, D_count=1 Count=1, D_count=1 1 Count=2, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=1, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=2, D_count=1 Count=0, D_count=1 Any ideas what the heck is going on? Thanks a lot! jose "survival first, then happiness as we can manage it" ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

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added two Eclipse plug-ins for BJam support to Boost Subversion
by Frank Birbacher 02 May '08

02 May '08

Hi! I've created two small plug-ins for Eclipse: the first adds syntax highlighting to jamfiles, the second scans jamfiles for main targets and provides them in a tree view for easy building, like the MakeTargets view. Currently, they are in Boost svn at: http://svn.boost.org/svn/boost/sandbox-branches/birbacher/eclipse_contrib/ but they might as well move somewhere else soon. The svn contains a complete eclipse 3.3 project from which the "export -> Deployable plug-ins and fragments" command creates a ready-to-use Eclipse plug-in. The plug-ins depend on CDT. Both aren't perfect of course. I've hacked them in a couple of hours. I'd appreciate patches which fix bugs or improve features. Regards, Frank

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[filesystem] win32: fs::system_error_type undefined
by Andre Krause 02 May '08

02 May '08

hello list, i have upgraded to boost 1.35.0. running under win32 using visual studio 2008, i get: lib/boost/libs/filesystem/src/exception.cpp(39) : error C2039: 'system_error_type' : is not a member of 'boost::filesystem' what should i do? get the latest from subversion ? or downgrade to 34.1 ? everything else works fine. by the way, i include #include "../../lib/boost/libs/filesystem/src/operations.cpp" #include "../../lib/boost/libs/filesystem/src/exception.cpp" #include "../../lib/boost/libs/filesystem/src/path.cpp" #include "../../lib/boost/libs/filesystem/src/portability.cpp" #include "../../lib/boost/libs/system/src/error_code.cpp" #include "../../lib/boost/libs/iostreams/src/bzip2.cpp" manually. maybe this causes the problem? thanks in advance !

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install_name incorrect for dylibs on OS X 10.4
by Sancho McCann 02 May '08

02 May '08

Hi, This seems to be a problem for a few of the dynamic libraries. Running otool on libboost_filesystem, for example, gives: otool -L /opt/local/lib/libboost_filesystem-mt-1_35.dylib /opt/local/lib/libboost_filesystem-mt-1_35.dylib: /opt/local/lib/libboost_filesystem-mt-1_35.dylib (compatibility version 0.0.0, current version 0.0.0) libboost_system-mt-1_35.dylib (compatibility version 0.0.0, current version 0.0.0) /usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 7.4.0) /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 88.3.3) The install_name of libboost_system-mt-1_35.dylib is missing the absolute path. How should this be addressed? Sancho

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Using gcc 4.2 mudflap with boost 1.34.1
by Robert Mecklenburg 02 May '08

02 May '08

First, please excuse the length of this message, I just want to provide a clear picture of what's happening. I'm interested in using the gcc mudflap feature (sort of valgrind/purify implemented in the compiler) with the boost libraries. http://gcc.gnu.org/wiki/Mudflap_Pointer_Debugging http://gcc-hk.internet.bs/summit/2003/mudflap.pdf Unfortunately, I'm running into serious problems. Preliminaries: I'm using gcc 4.2, boost 1.34.1, Ubuntu Linux Hardy Heron. I found a message from 2006-07-31 discussing mudflap (http://lists.boost.org/boost-build/2006/07/14546.php) but it only refers to build flags. Now for the issue, writing a simple test case (which appears to run correctly without mudflap instrumentation): #define BOOST_TEST_DYN_LINK #define BOOST_TEST_MAIN #include <boost/test/unit_test.hpp> BOOST_AUTO_TEST_CASE(mudflap) { } And compiling and running yields: $ g++ -g -fmudflapth -c -o mudflapTest.o mudflapTest.cpp $ g++ -g -fmudflapth mudflapTest.o /usr/lib/libmudflapth.so.0 \ -lboost_unit_test_framework -lboost_thread -o mudflapTest $ ./mudflapTest ******* mudflap violation 1 (check/write): time=1209744559.152187 ptr=0xbfa3594c size=4 pc=0xb7e047bd location=`/usr/include/boost/shared_ptr.hpp:149 (boost::shared_ptr<boost::unit_test::ut_detail::callback0_impl<boost::unit_test::ut_detail::unused> >::shared_ptr<boost::unit_test::ut_detail::callback0_impl_t<boost::unit_test::ut_detail::unused, void (*)()> >)' /usr/lib/libmudflap.so.0(__mf_check+0x3d) [0xb7e047bd] /home/mecklen/s5w/trunk/core/common/src/test/mudflapTest(_ZN5boost10shared_ptrINS_9unit_test9ut_detail14callback0_implINS2_6unusedEEEEC1INS2_16callback0_impl_tIS4_PFvvEEEEEPT_+0x77) [0x804ef79] /home/mecklen/s5w/trunk/core/common/src/test/mudflapTest(_ZN5boost9unit_test9callback0INS0_9ut_detail6unusedEEC1IPFvvEEET_+0x33) [0x804efe7] number of nearby objects: 0 ******* <10 more violations occur here> *** No errors detected Obviously, mudflap believes that there were invalid writes occurring in the boost libraries. I attempted to debug this by first expanding the cpp macros and removing the use of unnamed temporaries to yield: ... boost::unit_test::const_string name("mudflap"); boost::unit_test::test_case * tc = boost::unit_test::make_test_case(&mudflap_invoker, name); static boost::unit_test::ut_detail::auto_test_unit_registrar mudflap_registrar(tc, boost::unit_test::ut_detail::auto_tc_exp_fail<mudflap_id>::value); ... Running this under gdb I discover that the alleged violation appears to occur in the execution of the make_test_case(invoker, name) call, during the construction of a shared_ptr: (gdb) where #0 shared_ptr<boost::unit_test::ut_detail::callback0_impl_t<boost::unit_test::ut_detail::unused, void (*)()> > (this=0xbfecbddc, p=0x80d4d28) at /usr/include/boost/shared_ptr.hpp:149 #1 0x0804ed9d in callback0<void (*)()> (this=0xbfecbddc, f=0x804bf6c <mudflap_invoker>) at /usr/include/boost/test/utils/callback.hpp:111 #2 0x0804c5cd in __static_initialization_and_destruction_0 (__initialize_p=1, __priority=65535) at mudflapTest.cpp:26 #3 0x0804c65a in global constructors keyed to _ZN5boost9unit_test44_GLOBAL__N_mudflapTest.cpp_00000000_456E4E3F13unit_test_logE () at mudflapTest.cpp:36 #4 0x0804f4f5 in __do_global_ctors_aux () #5 0x0804bcb4 in _init () #6 0x0804f499 in __libc_csu_init () #7 0xb7b853f1 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6 #8 0x0804bed1 in _start () ******* mudflap violation 1 (check/write): time=1209743602.806628 ptr=0xbfecbddc size=4 ... The target of the shared pointer appears normal: (gdb) p p $2 = (boost::unit_test::ut_detail::callback0_impl_t<boost::unit_test::ut_detail::unused,void (*)()> *) 0x80d4d28 (gdb) p *p $3 = (boost::unit_test::ut_detail::callback0_impl_t<boost::unit_test::ut_detail::unused,void (*)()>) { <boost::unit_test::ut_detail::callback0_impl<boost::unit_test::ut_detail::unused>> = { _vptr.callback0_impl = 0x8051970 }, members of boost::unit_test::ut_detail::callback0_impl_t<boost::unit_test::ut_detail::unused,void (*)()>: m_f = 0x804bf6c <mudflap_invoker> } The pointers within this object appear to point to valid addresses with proper data (supporting evidence omitted for brevity). (I have tried to run the unit test code without shared libraries, but my attempts at static linking have failed, so far.) In short, I cannot determine why mudflap thinks this is bogus. I believe mudflap is implemented correctly, as I've used it successfully on other non-boost test cases. Has anyone used mudflap successfully with boost? It seems a powerful tool if it could be made to work. Thanks in advance for any suggestions. -- Robert Mecklenburg

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boost::mpl::switch?
by Robert Dailey 02 May '08

02 May '08

Hey guys, I was wondering if there was some sort of MPL Switch concept in the boost library. Before I go any further on that topic, let me first explain what I'm trying to do. I'm currently using a library that has several functions as follows: void SetParamFloat( char* name, float value ); void SetParamInt( char* name, int value ); void SetParamString( char* name, char* value ); I'm creating a sort of facade around this library, and as a result I have a function that looks as follows: template< typename t_type > void SetParam( char* name, t_type value ); What I need to do is map real types to function pointers, obviously. But I want all of this to be done at compile time, since I have all of the information to do so. My first thought on a solution to this problem was boost::mpl::map, but then I thought to myself: How do I pass function pointers as template arguments? And on top of that, since all of the functions I'd be mapping to types all have different types anyway, creating a functor object for function pointers seems difficult as you would have to do a lot of messy template class specializations. We'd have to wrap the function pointers in functors of some sort because boost::mpl::map requires typed template arguments, instead of non-type template arguments. This is what brings me to a sort of switch concept. If there was such a concept in the boost library, it might be more likely to hide the boiler plate code required simply to get to the point to where I can start adding items to a boost::mpl::map. I realize there is no boost::switch concept (at least that google shows), but I was wondering if there was something like it. As a pseudo code example, I would want the logic of my new function to work as follows: template< typename t_type > void SetParam( char* name, t_type value ) { switch( t_type ) { case float: { SetParamFloat( name, value ); break; } case int: { SetParamInt( name, value ); break; } case char*: { SetParamString( name, value ); break; } } } Any help is greatly appreciated. I guess what I really need is some guidance on the matter. I strive for a generic way to implement this, but I don't want it to look messy, as most template code has the bad habit of turning out that way.

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[bbost graph] need help on adjacency_list< ListS, ...
by lippmann2＠gmx.de 01 May '08

01 May '08

To use the remove_edge() function I have to change my graph definition from typedef adjacency_list< vecS, vecS, ....> to adjacency_list< ListS, listS, ....> . now the add_edge (...) function gives me an error while compiling: 'boost::add_edge' : cannot convert parameter 1 from 'int' to 'void *' what does this mean ???? also using these typedefs: typedef graph_traits < TGraph >::vertex_descriptor Tvertex_descriptor; typedef graph_traits < TGraph >::edge_descriptor Tedge_descriptor; typedef graph_traits <TGraph>::vertex_iterator Tvertex_iter; typedef graph_traits <TGraph>::edge_iterator Tedge_iter; seems to be no good idea, because I get many compiler errors now? Any help is welcome. -- Psst! Geheimtipp: Online Games kostenlos spielen bei den GMX Free Games! http://games.entertainment.gmx.net/de/entertainment/games/free

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Filesystem doc bug
by John Reynolds 01 May '08

01 May '08

I just did an upgrade from 1.33.1 to 1.35.0 and got bit by the BOOST_ALL_DYN_LINK et al macros. Anyways at http://www.boost.org/doc/libs/1_35_0/libs/filesystem/doc/index.htm#Build ing there is a reference to http://www.boost.org/more/separate_compilation.html explaining the macros, which does not exist. Any idea where this link should be as I am would be curious to read up on these macros. 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 John.Reynolds(a)airmantech.com / John.Reynolds(a)flightman.com www.airmantech.com / www.flightman.com THE INFORMATION IN THIS E-MAIL IS CONFIDENTIAL AND MAY BE LEGALLY PRIVILEGED. IT IS INTENDED SOLELY FOR THE ADDRESSEE. ACCESS TO THIS E-MAIL BY ANYONE ELSE IS UNAUTHORISED. IF YOU ARE NOT THE INTENDED RECIPIENT, ANY DISCLOSURE, COPYRIGHT, DISTRIBUTION OR ANY ACTION TAKEN OR OMITTED TO BE TAKEN IN RELIANCE ON IT, IS PROHIBITED AND MAY BE UNLAWFUL.

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Re: [Boost-users] boost::result_of error?
by Hicham Mouline 01 May '08

01 May '08

I see. Perfectly clear now.I had obviously forgotten about scope resolution for types. Best Regards,ps: one unrelated question to follow in a separate post :-) ----- Original Message ----- From: "Ovanes Markarian" To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] boost::result_of error? Date: Thu, 1 May 2008 19:45:45 +0200 Please read below. Just got an angry email from some pedantic Mailing-List guard. On Thu, May 1, 2008 at 6:07 PM, Hicham Mouline <hicham(a)mouline.org> wrote: Thanks for your clarifications, In your example, if "MyFunc" was typedef'd before its use in the template argument as say typedef int (*MyFunc)(int); it would not conflict with its use in the template argument ? First of all. I am sorry for an error I made when stated: template<T MyFunc()> struct X { typedef T result_type; typedef MyFunc function_type; }; This is not a valid C++ code, since MyFunc as the template parameter is a real pointer to a function, it is not a type. And you cannot make a typedef for a pointer. Only for it's type. To visualize the usage I have written a small program: #include <iostream> #include <typeinfo> typedef int (*MyFunc)(int, int); int get_int(int x) { return x; } int plus(int x, int y) { return x+y; } template<int (*MyFunc)(int)> struct X { typedef int result_type; result_type exec()const { ::MyFunc f2 = + //use scope resolution to access the global MyFunc return MyFunc(10)+f2(10,10); } }; int main(int argc, char* argv[]) { X<&get_int> x; std::cout << "sum: " << x.exec() << "\n"; }

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Re: [Boost-users] boost::result_of error?
by Hicham Mouline 01 May '08

01 May '08

Thanks for your clarifications, In your example, if "MyFunc" was typedef'd before its use in the template argument as say typedef int (*MyFunc)(int); it would not conflict with its use in the template argument ? best regards, ----- Original Message ----- From: "Ovanes Markarian" To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] boost::result_of error? Date: Thu, 1 May 2008 17:13:40 +0200 Hicham, it does not create a new new type it only declares a type. Consider the following example: template<int ()> struct X {}; This means your type X expects a function pointer type with return value int and no parameters. This can be used in a meta programming to make some type assumptions or inspection. This is how the result_of works. Think of result_of as of type X but a bit more complex and which can give an assumption about the function type passed. We can write: template<int ()> struct X { typedef int type; }; A more generic form would be if int would be any valid result type T, so that we could write smth like this: template<T ()> struct X { typedef T type; }; Actually this is not a legal C++ struct, since T was not declared as template parameter, but think of it as if it would. template<T MyFunc()> struct X { typedef T result_type; typedef MyFunc function_type; }; Here MyFunc is a name of the function pointer type, which allows us to reference this type from inside the template. Hope that helps. With Kinds regards, Ovanes On Thu, May 1, 2008 at 2:32 PM, Hicham Mouline <hicham(a)mouline.org> wrote: But "floatfct" was defined earlier as the type of a pointer to a function with only 1 arg float.just passing the template argument to result_of creates a new type?is the new type also called floatfct ? ----- Original Message ----- From: "Ovanes Markarian" To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] boost::result_of error? Date: Thu, 1 May 2008 13:58:21 +0200 Hicham, as far as I understand your code you pass to result_of a new type: typedef typename boost::result_of<floatfct(float, float)>::type resultype; This type is a pointer to a function type, which has as return type a pointer to floatfct and as params float, float. That's why it compiles. Regards, Ovanes On Thu, May 1, 2008 at 1:25 PM, Hicham Mouline <hicham(a)mouline.org> wrote: Hello, trying out Pete Becker's "c++ std lib ext" exercises, ex1 p155 #include <iostream> #include <typeinfo> #include <boost/utility/result_of.hpp> typedef float (*floatfct)(float); int main(int argc, char* argv[]) { typedef typename boost::result_of<floatfct(float, float)>::type resultype; std::cout<< typeid(resultype).name() << std::endl; } should fail, because result_of is instantiated with a callable type with 2 float args, while it's been defined as taking 1 float arg only? with intel10.1-MSVC8-boost1.35, it links. rds, _______________________________________________ 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 _______________________________________________ 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

2 1

Re: [Boost-users] undefined symbols
by peter_foelsche＠agilent.com 01 May '08

01 May '08

this problem came from trying to create a 64bit executable using 32bit libraries. It seems that bjam does not find the compiler via the path environment variable but somehow directly and thus by default found the 32bit compiler and created 32bit libraries ________________________________ From: FOELSCHE,PETER (A-SantaClara,ex1) Sent: Wednesday, April 30, 2008 17:27 To: 'boost-users(a)lists.boost.org' Subject: undefined symbols ------ Build started: Project: boost_memory_mapped_io, Configuration: Release x64 ------ Linking... main.obj : error LNK2001: unresolved external symbol "class boost::filesystem::file_status __cdecl boost::filesystem::detail::status_api(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class boost::system::error_code &)" (?status_api@detail@filesystem@boost@@YA?AVfile_status@23@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEAVerror_code@system@3@@Z) main.obj : error LNK2001: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::get_system_category(void)" (?get_system_category@system@boost@@YAAEBVerror_category@12@XZ) main.obj : error LNK2001: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::get_posix_category(void)" (?get_posix_category@system@boost@@YAAEBVerror_category@12@XZ) main.obj : error LNK2001: unresolved external symbol "struct std::pair<class boost::system::error_code,unsigned __int64> __cdecl boost::filesystem::detail::file_size_api(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?file_size_api@detail@filesystem@boost@@YA?AU?$pair@Verror_code@system@boost@@_K@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@5@@Z) C:\DocumentsAndSettings\pfoelsch\MyDocuments\boost_memory_mapped_io\x64\Release\boost_memory_mapped_io.exe : fatal error LNK1120: 4 unresolved externals Build log was saved at "file://c:\DocumentsAndSettings\pfoelsch\MyDocuments\boost_memory_mapped_io\boost_memory_mapped_io\x64\Release\BuildLog.htm" boost_memory_mapped_io - 5 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== see attached main.cpp I link with boost_system-vc80-mt-1_35.lib boost_filesystem-vc80-mt-1_35.lib and other boost libraries which are referenced directly. I work on 64bit XP compiling for 64bit.

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BOOST & STLport
by David Sowinski 01 May '08

01 May '08

What needs to be done to get BOOST (1.34.1) and STLport (5.1.5) to correctly coexist with each other under Windows and Visual Studio 2005? I have scoured the web and tried a ton of different configurations, none of which have worked. The problems that I am seeing appear to be related to STLport's IOStreams vs Microsoft's IOStreams. Any pointers to successful solutions would be greatly appreciated. _______________________________________________________ The information in this email or in any file attached hereto is intended only for the personal and confiden- tial use of the individual or entity to which it is addressed and may contain information that is propri- etary and confidential. If you are not the intended recipient of this message you are hereby notified that any review, dissemination, distribution or copying of this message is strictly prohibited. This communica- tion is for information purposes only and should not be regarded as an offer to sell or as a solicitation of an offer to buy any financial product. Email trans- mission cannot be guaranteed to be secure or error- free. P6070214

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boost::result_of error?
by Hicham Mouline 01 May '08

01 May '08

Hello, trying out Pete Becker's "c++ std lib ext" exercises, ex1 p155 #include <iostream> #include <typeinfo> #include <boost/utility/result_of.hpp> typedef float (*floatfct)(float); int main(int argc, char* argv[]) { typedef typename boost::result_of<floatfct(float, float)>::type resultype; std::cout<< typeid(resultype).name() << std::endl; } should fail, because result_of is instantiated with a callable type with 2 float args, while it's been defined as taking 1 float arg only? with intel10.1-MSVC8-boost1.35, it links. rds,

2 1

Help! Application using Regex not working (Boost building problem?)
by Paula Costa 01 May '08

01 May '08

Hi, I've a Dev-Cpp, mingw, Windows XP development environment. I'm trying to develop an application based on Regex but I'm not able to run even the simple example from "Getting Started" section of Boost documentation or the "Credit Card Numbers" example from Regex. I've built the library through different ways (trying just to build the regex library from John's homepage or building the whole Boost library through bjam). The building process was always OK and I'm pretty sure that I'm correctly linking the files in Dev-Cpp (I also used the path described at http://wagjo.com/index.php?id=27) However, I always get similar result: a lot of compiler messages saying that I have "multiple definitions of something". Does anyone in this list could help me? Here is the compiler log from one of the many tentatives that I've made (sorry about huge text): Compiler: OpenCV+Regex Building Makefile: "C:\Documents and Settings\pdcosta\Desktop\Makefile.win" Executing make... make.exe -f "C:\Documents and Settings\pdcosta\Desktop\Makefile.win" all g++.exe -D__DEBUG__ -c "../../../Arquivos de programas/regex/libs/regex/example/snippets/credit_card_example.cpp" -o "../../../Arquivos de programas/regex/libs/regex/example/snippets/credit_card_example.o" -I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include" -I"C:/Dev-Cpp/include/c++/3.4.2/backward" -I"C:/Dev-Cpp/include/c++/3.4.2/mingw32" -I"C:/Dev-Cpp/include/c++/3.4.2" -I"C:/Dev-Cpp/include" -I"C:/Arquivos de programas/regex" -L"C:\Arquivos de Programas\OpenCV\lib" -lcxcore -lcv -lcvaux -lhighgui -lml -lcvcam -g3 -mwindows In file included from C:/Arquivos de programas/regex/boost/config.hpp:35, from C:/Arquivos de programas/regex/boost/regex/config.hpp:94, from C:/Arquivos de programas/regex/boost/regex/v3/cregex.hpp:28, from C:/Arquivos de programas/regex/boost/cregex.hpp:27, from C:/Arquivos de programas/regex/boost/regex/v3/regex.hpp:32, from C:/Arquivos de programas/regex/boost/regex.hpp:31, from ../../../Arquivos de programas/regex/libs/regex/example/snippets/credit_card_example.cpp:24: C:/Arquivos de programas/regex/boost/config/compiler/gcc.hpp:66:7: warning: #warning "Unknown compiler version - please run the configure tests and report the results" g++.exe: -lcxcore: linker input file unused because linking not done g++.exe: -lcv: linker input file unused because linking not done g++.exe: -lcvaux: linker input file unused because linking not done g++.exe: -lhighgui: linker input file unused because linking not done g++.exe: -lml: linker input file unused because linking not done g++.exe: -lcvcam: linker input file unused because linking not done g++.exe -D__DEBUG__ "../../../Arquivos de programas/regex/libs/regex/example/snippets/credit_card_example.o" -o "Project1.exe" -L"C:/Dev-Cpp/lib" -L"C:/Arquivos de programas/regex" -L"C:/Arquivos de programas/regex/libs/regex/build/gcc" "../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a" -g3 -mwindows ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.data$_ZTISt13runtime_error[typeinfo for std::runtime_error]+0x0):instances.cpp: multiple definition of `typeinfo for std::runtime_error' ../../../Arquivos de programas/regex/libs/regex/example/snippets/credit_card_example.o(.rdata$_ZTISt13runtime_error[typeinfo for std::runtime_error]+0x0):C:/Arquivos de programas/regex/boost/regex/v3/regex.hpp: first defined here ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZTSSt13runtime_error[typeinfo name for std::runtime_error]+0x0):instances.cpp: multiple definition of `typeinfo name for std::runtime_error' ../../../Arquivos de programas/regex/libs/regex/example/snippets/credit_card_example.o(.rdata$_ZTSSt13runtime_error[typeinfo name for std::runtime_error]+0x0):C:/Arquivos de programas/regex/boost/regex/v3/regex.hpp: first defined here ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.data$_ZTISt9exception[typeinfo for std::exception]+0x0):instances.cpp: multiple definition of `typeinfo for std::exception' ../../../Arquivos de programas/regex/libs/regex/example/snippets/credit_card_example.o(.rdata$_ZTISt9exception[typeinfo for std::exception]+0x0):C:/Arquivos de programas/regex/boost/regex/v3/regex.hpp: first defined here ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZTSSt9exception[typeinfo name for std::exception]+0x0):instances.cpp: multiple definition of `typeinfo name for std::exception' ../../../Arquivos de programas/regex/libs/regex/example/snippets/credit_card_example.o(.rdata$_ZTSSt9exception[typeinfo name for std::exception]+0x0):C:/Arquivos de programas/regex/boost/regex/v3/regex.hpp: first defined here C:/Dev-Cpp/lib/libstdc++.a(stdexcept.o)(.rdata$_ZTVSt13runtime_error[vtable for std::runtime_error]+0x0):stdexcept.cc: multiple definition of `vtable for std::runtime_error' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.data$_ZTVSt13runtime_error[vtable for std::runtime_error]+0x0):instances.cpp: first defined here ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text+0x173):c_regex_traits.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text+0x17a):c_regex_traits.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text+0x529):c_regex_traits.cpp: undefined reference to `std::__default_alloc_template<true, 0>::allocate(unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text+0x696):c_regex_traits.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text+0x109a):c_regex_traits.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text+0x10b3):c_regex_traits.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text$_ZNSt10_List_baseIN42_GLOBAL__N_.._src_c_regex_traits.cppeur9ib14collate_name_tESaIS1_EE5clearEv[std::_List_base<(anonymous namespace)::collate_name_t, std::allocator<(anonymous namespace)::collate_name_t> >::clear()]+0x47):c_regex_traits.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text$_ZN5boost9re_detail16find_sort_syntaxINS_14c_regex_traitsIcEEcEEjPKT_PT0_[unsigned int boost::re_detail::find_sort_syntax<boost::c_regex_traits<char>, char>(boost::c_regex_traits<char> const*, char*)]+0x6b):c_regex_traits.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text$_ZN5boost9re_detail16find_sort_syntaxINS_14c_regex_traitsIcEEcEEjPKT_PT0_[unsigned int boost::re_detail::find_sort_syntax<boost::c_regex_traits<char>, char>(boost::c_regex_traits<char> const*, char*)]+0x7b):c_regex_traits.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text$_ZN5boost9re_detail16find_sort_syntaxINS_14c_regex_traitsIcEEcEEjPKT_PT0_[unsigned int boost::re_detail::find_sort_syntax<boost::c_regex_traits<char>, char>(boost::c_regex_traits<char> const*, char*)]+0x198):c_regex_traits.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text$_ZN5boost9re_detail16find_sort_syntaxINS_14c_regex_traitsIcEEcEEjPKT_PT0_[unsigned int boost::re_detail::find_sort_syntax<boost::c_regex_traits<char>, char>(boost::c_regex_traits<char> const*, char*)]+0x1a8):c_regex_traits.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text$_ZN5boost9re_detail16find_sort_syntaxINS_14c_regex_traitsIcEEcEEjPKT_PT0_[unsigned int boost::re_detail::find_sort_syntax<boost::c_regex_traits<char>, char>(boost::c_regex_traits<char> const*, char*)]+0x1de):c_regex_traits.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text$_ZN5boost9re_detail16find_sort_syntaxINS_14c_regex_traitsIcEEcEEjPKT_PT0_[unsigned int boost::re_detail::find_sort_syntax<boost::c_regex_traits<char>, char>(boost::c_regex_traits<char> const*, char*)]+0x1ee):c_regex_traits.cpp: more undefined references to `std::string::_S_empty_rep_storage' follow ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text$_ZNSs12_S_constructIPKcEEPcT_S3_RKSaIcESt20forward_iterator_tag[char* std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_S_construct<char const*>(char const*, char const*, std::allocator<char> const&, std::forward_iterator_tag)]+0x27):c_regex_traits.cpp: undefined reference to `std::string::_Rep::_S_create(unsigned int, std::allocator<char> const&)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text$_ZNSs12_S_constructIPKcEEPcT_S3_RKSaIcESt20forward_iterator_tag[char* std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_S_construct<char const*>(char const*, char const*, std::allocator<char> const&, std::forward_iterator_tag)]+0x6f):c_regex_traits.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text$_ZNSs12_S_constructIPKcEEPcT_S3_RKSaIcESt20forward_iterator_tag[char* std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_S_construct<char const*>(char const*, char const*, std::allocator<char> const&, std::forward_iterator_tag)]+0x74):c_regex_traits.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text$_ZNSt14__simple_allocISt10_List_nodeIN42_GLOBAL__N_.._src_c_regex_traits.cppeur9ib14collate_name_tEESt24__default_alloc_templateILb1ELi0EEE8allocateEj[std::__simple_alloc<std::_List_node<(anonymous namespace)::collate_name_t>, std::__default_alloc_template<true, 0> >::allocate(unsigned int)]+0x1a):c_regex_traits.cpp: undefined reference to `std::__default_alloc_template<true, 0>::allocate(unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(c_regex_traits.o)(.text$_ZNSt14__simple_allocISt10_List_nodeIN42_GLOBAL__N_.._src_c_regex_traits.cppeur9ib14collate_name_tEESt24__default_alloc_templateILb1ELi0EEE10deallocateEPS3_j[std::__simple_alloc<std::_List_node<(anonymous namespace)::collate_name_t>, std::__default_alloc_template<true, 0> >::deallocate(std::_List_node<(anonymous namespace)::collate_name_t>*, unsigned int)]+0x18):c_regex_traits.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEEC2EPKcjRKS3_[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::reg_expression(char const*, unsigned int, std::allocator<char> const&)]+0xf6):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEEC1EPKcjRKS3_[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::reg_expression(char const*, unsigned int, std::allocator<char> const&)]+0xf6):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEEC2EPKcjjRKS3_[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::reg_expression(char const*, unsigned int, unsigned int, std::allocator<char> const&)]+0xe6):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEEC1EPKcjjRKS3_[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::reg_expression(char const*, unsigned int, unsigned int, std::allocator<char> const&)]+0xe6):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEEC2ERKS4_[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::reg_expression(boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> > const&)]+0x133):instances.cpp: more undefined references to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' follow ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEE11fixup_applyEPNS_9re_detail14re_syntax_baseEj[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::fixup_apply(boost::re_detail::re_syntax_base*, unsigned int)]+0x182):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::allocate(unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEE11fixup_applyEPNS_9re_detail14re_syntax_baseEj[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::fixup_apply(boost::re_detail::re_syntax_base*, unsigned int)]+0x1b8):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEE11compile_setERPKcS6_[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::compile_set(char const*&, char const*)]+0x184):instances.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEE11compile_setERPKcS6_[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::compile_set(char const*&, char const*)]+0x18e):instances.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEE11compile_setERPKcS6_[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::compile_set(char const*&, char const*)]+0xb8a):instances.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEE11compile_setERPKcS6_[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::compile_set(char const*&, char const*)]+0xba4):instances.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEE15compile_set_auxERNS_9re_detail6jstackISsS3_EES8_RNS6_ImS3_EES8_bRKNS5_12_narrow_typeE[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::compile_set_aux(boost::re_detail::jstack<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<char> >&, boost::re_detail::jstack<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<char> >&, boost::re_detail::jstack<unsigned long, std::allocator<char> >&, boost::re_detail::jstack<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<char> >&, bool, boost::re_detail::_narrow_type const&)]+0x18f):instances.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost14reg_expressionIcNS_12regex_traitsIcEESaIcEE15compile_set_auxERNS_9re_detail6jstackISsS3_EES8_RNS6_ImS3_EES8_bRKNS5_12_narrow_typeE[boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> >::compile_set_aux(boost::re_detail::jstack<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<char> >&, boost::re_detail::jstack<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<char> >&, boost::re_detail::jstack<unsigned long, std::allocator<char> >&, boost::re_detail::jstack<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<char> >&, bool, boost::re_detail::_narrow_type const&)]+0x196):instances.cpp: more undefined references to `std::string::_S_empty_rep_storage' follow ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail18match_results_baseIPKcSaIcEEC2ERKS4_[boost::re_detail::match_results_base<char const*, std::allocator<char> >::match_results_base(std::allocator<char> const&)]+0x42):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::allocate(unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail18match_results_baseIPKcSaIcEEC1ERKS4_[boost::re_detail::match_results_base<char const*, std::allocator<char> >::match_results_base(std::allocator<char> const&)]+0x46):instances.cpp: undefined reference to `std::allocator<char>::allocate(unsigned int, void const*)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail18match_results_baseIPKcSaIcEE6m_freeEv[boost::re_detail::match_results_base<char const*, std::allocator<char> >::m_free()]+0x84):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail18match_results_baseIPKcSaIcEE8set_sizeEj[boost::re_detail::match_results_base<char const*, std::allocator<char> >::set_size(unsigned int)]+0x61):instances.cpp: undefined reference to `std::allocator<char>::allocate(unsigned int, void const*)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail18match_results_baseIPKcSaIcEE8set_sizeEj[boost::re_detail::match_results_base<char const*, std::allocator<char> >::set_size(unsigned int)]+0x1a8):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail18match_results_baseIPKcSaIcEE8set_sizeEjS3_S3_[boost::re_detail::match_results_base<char const*, std::allocator<char> >::set_size(unsigned int, char const*, char const*)]+0x61):instances.cpp: undefined reference to `std::allocator<char>::allocate(unsigned int, void const*)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail18match_results_baseIPKcSaIcEE8set_sizeEjS3_S3_[boost::re_detail::match_results_base<char const*, std::allocator<char> >::set_size(unsigned int, char const*, char const*)]+0x21a):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail18match_results_baseIPKcSaIcEE3cowEv[boost::re_detail::match_results_base<char const*, std::allocator<char> >::cow()]+0x34):instances.cpp: undefined reference to `std::allocator<char>::allocate(unsigned int, void const*)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail11raw_storageISaIcEEC1ERKS2_[boost::re_detail::raw_storage<std::allocator<char> >::raw_storage(std::allocator<char> const&)]+0x42):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::allocate(unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail8kmp_freeIcSaIcEEEvPNS0_8kmp_infoIT_EERKT0_[void boost::re_detail::kmp_free<char, std::allocator<char> >(boost::re_detail::kmp_info<char>*, std::allocator<char> const&)]+0x44):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail6jstackIjSaIcEED1Ev[boost::re_detail::jstack<unsigned int, std::allocator<char> >::~jstack()]+0x6a):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail6jstackIjSaIcEED1Ev[boost::re_detail::jstack<unsigned int, std::allocator<char> >::~jstack()]+0x97):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail11kmp_compileIPccNS0_14kmp_translatorINS_12regex_traitsIcEEEESaIcEEEPNS0_8kmp_infoIT0_EET_SC_S9_T1_RKT2_[boost::re_detail::kmp_info<char>* boost::re_detail::kmp_compile<char*, char, boost::re_detail::kmp_translator<boost::regex_traits<char> >, std::allocator<char> >(char*, char*, char, boost::re_detail::kmp_translator<boost::regex_traits<char> >, std::allocator<char> const&)]+0x69):instances.cpp: undefined reference to `std::allocator<char>::allocate(unsigned int, void const*)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail11raw_storageISaIcEE6resizeEj[boost::re_detail::raw_storage<std::allocator<char> >::resize(unsigned int)]+0x56):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail16re_is_set_memberIPKccNS_12regex_traitsIcEESaIcEEET_S7_S7_PKNS0_11re_set_longERKNS_14reg_expressionIT0_T1_T2_EE[char const* boost::re_detail::re_is_set_member<char const*, char, boost::regex_traits<char>, std::allocator<char> >(char const*, char const*, boost::re_detail::re_set_long const*, boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> > const&)]+0x13c):instances.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail16re_is_set_memberIPKccNS_12regex_traitsIcEESaIcEEET_S7_S7_PKNS0_11re_set_longERKNS_14reg_expressionIT0_T1_T2_EE[char const* boost::re_detail::re_is_set_member<char const*, char, boost::regex_traits<char>, std::allocator<char> >(char const*, char const*, boost::re_detail::re_set_long const*, boost::reg_expression<char, boost::regex_traits<char>, std::allocator<char> > const&)]+0x146):instances.cpp: undefined reference to `std::string::_S_empty_rep_storage' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail6jstackISsSaIcEED1Ev[boost::re_detail::jstack<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<char> >::~jstack()]+0xf1):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail6jstackISsSaIcEED1Ev[boost::re_detail::jstack<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<char> >::~jstack()]+0x141):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail6jstackImSaIcEED1Ev[boost::re_detail::jstack<unsigned long, std::allocator<char> >::~jstack()]+0x6a):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail6jstackImSaIcEED1Ev[boost::re_detail::jstack<unsigned long, std::allocator<char> >::~jstack()]+0x97):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZN5boost9re_detail11kmp_compileIPKccNS0_14kmp_translatorINS_12regex_traitsIcEEEESaIcEEEPNS0_8kmp_infoIT0_EET_SD_SA_T1_RKT2_[boost::re_detail::kmp_info<char>* boost::re_detail::kmp_compile<char const*, char, boost::re_detail::kmp_translator<boost::regex_traits<char> >, std::allocator<char> >(char const*, char const*, char, boost::re_detail::kmp_translator<boost::regex_traits<char> >, std::allocator<char> const&)]+0x69):instances.cpp: undefined reference to `std::allocator<char>::allocate(unsigned int, void const*)' ../../../Arquivos de programas/regex/libs/regex/build/gcc/libboost_regex.a(instances.o)(.text$_ZNSaIhE8allocateEjPKv[std::allocator<unsigned char>::allocate(unsigned int, void const*)]+0x17):instances.cpp: undefined reference to `std::__default_alloc_template<true, 0>::allocate(unsigned int)' collect2: ld returned 1 exit status make.exe: *** [Project1.exe] Error 1 Execution terminated

2 1

undefined symbols
by peter_foelsche＠agilent.com 01 May '08

01 May '08

------ Build started: Project: boost_memory_mapped_io, Configuration: Release x64 ------ Linking... main.obj : error LNK2001: unresolved external symbol "class boost::filesystem::file_status __cdecl boost::filesystem::detail::status_api(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,class boost::system::error_code &)" (?status_api@detail@filesystem@boost@@YA?AVfile_status@23@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEAVerror_code@system@3@@Z) main.obj : error LNK2001: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::get_system_category(void)" (?get_system_category@system@boost@@YAAEBVerror_category@12@XZ) main.obj : error LNK2001: unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::get_posix_category(void)" (?get_posix_category@system@boost@@YAAEBVerror_category@12@XZ) main.obj : error LNK2001: unresolved external symbol "struct std::pair<class boost::system::error_code,unsigned __int64> __cdecl boost::filesystem::detail::file_size_api(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (?file_size_api@detail@filesystem@boost@@YA?AU?$pair@Verror_code@system@boost@@_K@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@5@@Z) C:\DocumentsAndSettings\pfoelsch\MyDocuments\boost_memory_mapped_io\x64\Release\boost_memory_mapped_io.exe : fatal error LNK1120: 4 unresolved externals Build log was saved at "file://c:\DocumentsAndSettings\pfoelsch\MyDocuments\boost_memory_mapped_io\boost_memory_mapped_io\x64\Release\BuildLog.htm" boost_memory_mapped_io - 5 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== see attached main.cpp I link with boost_system-vc80-mt-1_35.lib boost_filesystem-vc80-mt-1_35.lib and other boost libraries which are referenced directly. I work on 64bit XP compiling for 64bit.

1 0

[Thread] 1.35.0: Patch to fix initialization warnings
by Peter Klotz 30 Apr '08

30 Apr '08

The attached patch fixes initialization warnings in boost/thread/pthread/timespec.hpp and boost/thread/xtime.hpp. Best regards, Peter.

1 0

Boost.Threads, Boost.Interprocess, mutex
by Axel 30 Apr '08

30 Apr '08

Hello, In a single process but multithreaded software, should I use Boost.Threads synchronization mechanisms or can I use Boost.Interprocess synchronization mechanisms without counterparts and without seeing any difference ? ( in particular boost::interprocess::interprocess_semaphore class ) When using interprocess_mutex, my programm threw a lock_exception. I changed to boost::mutex and didn't managed to reproduce it. So, could this be related or the lock_exception has same chances to happen with boost::mutex ? I'm using semaphore to synchronize threads, so is it reliable in a single process multithreaded software ? By the way, I'm currently using boost::mutex instances which I lock() and unlock() directly. What benefits could I have by using boost::unique_lock (with a deferred lock) rather than access directly to the mutex instance ? Thanks in advance. Axel

2 1

Building boost 1.35.0 using mingw-gcc-4.2.1 with shared runtime
by Lothar May 30 Apr '08

30 Apr '08

Hi, by default, the shared boost libraries 1.35.0 compiled with mingw gcc 4.2.1 link with the static C/C++ runtime, which means that exceptions cannot be thrown across dll boundaries. Is there a simple way to make boost link using the "-shared-libgcc -lstdc++_s -D_DLL" options? Best regards, Lothar

1 0

[filesystem] bug???
by Ovanes Markarian 30 Apr '08

30 Apr '08

Hello *, iterating through a directory (let's say in Windows c:\) with system files, to which only OS has access (like hiberfil.sys) causes the directory iterator to throw an exception. This is all fine, but how can I know what was the error? status function of the particular directory enty returns regular_file as file_status and system_error_type is 0. The exception thrown is as always (in the filesystem lib) very much saying: boost::directory_iterator. Is anybody aware of other ways to determine what happened? Just to ignore the exception while iterating through the directory is not always the best choice. Many Thanks, Ovanes

1 0

[thread][1.35.0] Updated win32 condition variable implementation
by Anthony Williams 30 Apr '08

30 Apr '08

Hi all, Apologies to those who have been experiencing problems using boost.thread condition variables on Windows. I have checked in a new tentative fix to SVN trunk, and would be grateful if people could put it through its paces. Thank you for your patience, Anthony -- Anthony Williams | Just Software Solutions Ltd Custom Software Development | http://www.justsoftwaresolutions.co.uk Registered in England, Company Number 5478976. Registered Office: 15 Carrallack Mews, St Just, Cornwall, TR19 7UL

5 9

[iostreams] zlib name clashes
by Robert Bielik 30 Apr '08

30 Apr '08

I have an application where I need the zlib iostreams filter, however, the zlib part of the application is compiled with Z_PREFIX (which prepends all zlib functions with z_ via defines). Since Z_PREFIX prepends via defines, the zlib_base functions that are named the same as their zlib counterpart are "renamed" so the compiler cannot find the functions z_* in zlib_base. My suggestion is to rename the zlib_base functions so that they won't be redefined if Z_PREFIX is defines. /R

2 1

FW: Using Boost.Build with Boost.Python: Three Questions; "Copy" Rule
by Bilokon, Paul 30 Apr '08

30 Apr '08

Hi, Forwarding this question to boost-users as it applies to Boost.Python and Boost.Build in equal measure. Regards, Paul > ______________________________________________ > From: Bilokon, Paul > Sent: Wednesday, April 30, 2008 3:07 PM > To: 'boost-build(a)lists.boost.org' > Subject: Using Boost.Build with Boost.Python: Three Questions; > "Copy" Rule > > Hi, > > I would be very much obliged if you could share your insights on the > following three questions: > > (1) Is it at all possible to change the location of the "bin" folder > for my project or is it hardcoded? (bjam generates a number of files > under (project root)/bin/msvc-8.0/debug and (project > root)/bin/msvc-8.0/release. If so, what is the "correct" (good > practice) way of achieving this? > > (2) I am using Boost.Build with Boost.Python. The generated files are > linked to boost_python-vc80-mt-gd-1_34_1.dll (debug) and > boost_python-vc80-mt-gd-1_34_1.dll (release). But then I'm using > > install bin : hello : <location>$(dist-dir)/debug <variant>debug ; > install bin : hello : <location>$(dist-dir)/release <variant>release ; > > in Jamroot to dist the files. The DLLs do not get copied to the dist > location (nor do they appear under "bin"). How can I instruct bjam to > copy the DLLs? > > (3) On a related note, is there a "copy" rule in Boost.Build (very > much along the lines of the similar Ant rule), which would copy my > supporting Python files to $(dist-dir)? > > Sorry if my questions have obvious answers; I did read through the > documentation and check the related resources on the Web. > > Many thanks for your help. > > Regards, > Paul > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - This message is intended only for the personal and confidential use of the designated recipient(s) named above. If you are not the intended recipient of this message you are hereby notified that any review, dissemination, distribution or copying of this message is strictly prohibited. This communication is for information purposes only and should not be regarded as an offer to sell or as a solicitation of an offer to buy any financial product, an official confirmation of any transaction, or as an official statement of Lehman Brothers. Email transmission cannot be guaranteed to be secure or error-free. Therefore, we do not represent that this information is complete or accurate and it should not be relied upon as such. All information is subject to change without notice.

1 0

Re: [Boost-users] [variant, mpl] passing variable list of types
by Neal Meyer 30 Apr '08

30 Apr '08

This is what I use for the same thing typedef typename boost::make_variant_over< Types >::type variant_t; Where Types is a mpl::vector<> of the types I want to put in the vector. -Neal Date: Wed, 30 Apr 2008 17:28:30 +0300 From: Igor R. <igor_rubinov(a)hotmail.com> Subject: [Boost-users] [variant, mpl] passing variable list of types as a template parameter To: <boost-users(a)lists.boost.org> Message-ID: <BAY109-W253127985653CE5AF34F9AF8D80(a)phx.gbl> Content-Type: text/plain; charset="windows-1255" Hello, I've got a class template that one of its members is boost::variant: template<?> class MyClass { boost::variant</*bounded types*/> var_; }; At the stage of MyClass instantiation, I'd like to specify variant' bounded types list - which is variable. What's the most simple way to do this? Can I use mpl::list somehow - both as MyClass template parameter and in the variant specialization? Thank you.

2 1

[statechart] using the same event handler in multiple states.
by Paul Heil 30 Apr '08

30 Apr '08

I'm trying to implement a state machine using the boost statechart library. It has 3 main states (call them "State 1", "State 2", and "State 3") and 3 classes of events ("Class 1", "Class 2", and "Class 3"). State 1 should have event handlers for all Class 1 events. State 2 should have handlers for Class 1 and 2 events. State 3 should have handlers for Class 1, 2, and 3 events. The handling of each class of events is essentially the same regardless of what state the machine is in. Is there a way I can derive State 3 from States 1 and 2 so that I'm not repeating the Class 1 and 2 event handling code in State 3? What is the best way to architect something like this? Thanks, PaulH

3 3

boost MPI on FreeBSD 4.11
by Dheeraj Gautam 30 Apr '08

30 Apr '08

Hi, I am trying to compile Boost.MPI on FreeBSD 4.11 machine. But its failing with following error: Found MPICH wrapper compiler: mpic++ MPI compilation flags: -I/home/eqsupport/mpich2_install/include -L/home/eqsupport/mpich2_install/lib -lmpichcxx -lmpich MPI link flags: -I/home/eqsupport/mpich2_install/include -L/home/eqsupport/mpich2_install/lib -lmpichcxx -lmpich MPI build features: <include>/home/eqsupport/mpich2_install/include <library-path>/home/eqsupport/mpich2_install/lib <find-shared-library>mpichcxx <find-shared-library>mpich <include>/home/eqsupport/mpich2_install/include <library-path>/home/eqsupport/mpich2_install/lib < find-shared-library>mpichcxx <find-shared-library>mpich MPI launcher: mpirun -np ==================================================== warning: No toolsets are configured. warning: Configuring default toolset "gcc". warning: If the default is wrong, your build may not work correctly. warning: Use the "--toolset=xxxxx" option to override our guess. warning: For more configuration options, please consult warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html notice: will use 'g++' for gcc, condition <toolset>gcc-2.95.4 notice: using gcc libraries :: <toolset>gcc-2.95.4 :: /usr/bin /usr/lib /usr/lib32 /usr/lib64 notice: using gcc archiver :: <toolset>gcc-2.95.4 :: /usr/bin/ar warning: toolset gcc initialization: can't find tool windres warning: initialized from notice: using rc compiler :: <toolset>gcc-2.95.4 :: /usr/bin/as ...patience... ...found 1889 targets... ...updating 29 targets... gcc.compile.c++ bin.v2/libs/mpi/build/gcc-2.95.4/release/threading-multi/broadcast.o In file included from boost/serialization/nvp.hpp:34, from boost/serialization/serialization.hpp:24, from boost/archive/detail/oserializer.hpp:64, from boost/mpi/detail/mpi_datatype_oarchive.hpp:12, from boost/mpi/detail/mpi_datatype_cache.hpp:13, from boost/mpi/datatype.hpp:26, from boost/mpi/communicator.hpp:20, from boost/mpi/collectives.hpp:21, from boost/mpi/collectives_fwd.hpp:19, from boost/mpi/collectives/broadcast.hpp:11, from libs/mpi/src/broadcast.cpp:9: boost/serialization/base_object.hpp: In function `static const void * boost::serialization::detail::base_register<Base,Derived >::invoke()': boost/serialization/base_object.hpp:56: syntax error before `::' boost/serialization/base_object.hpp:59: use of class template `template <class T> boost::is_polymorphic<T>' as expression In file included from boost/mpi/detail/mpi_datatype_oarchive.hpp:12, from boost/mpi/detail/mpi_datatype_cache.hpp:13, from boost/mpi/datatype.hpp:26, from boost/mpi/communicator.hpp:20, from boost/mpi/collectives.hpp:21, from boost/mpi/collectives_fwd.hpp:19, from boost/mpi/collectives/broadcast.hpp:11, from libs/mpi/src/broadcast.cpp:9: boost/archive/detail/oserializer.hpp: In function `static const class boost::archive::detail::basic_pointer_oserializer * boos t::archive::detail::save_pointer_type<Archive,TPtr>::abstract<T>::register_type(Archive &)': boost/archive/detail/oserializer.hpp:329: syntax error before `::' boost/archive/detail/oserializer.hpp:330: template argument 1 is invalid boost/archive/detail/oserializer.hpp:330: confused by earlier errors, bailing out "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_MPI_DYN_ LINK=1 -DBOOST_MPI_SOURCE=1 -DNDEBUG -I"." -I"/home/eqsupport/mpich2_install/include" -c -o "bin.v2/libs/mpi/build/gcc-2.95.4 /release/threading-multi/broadcast.o" "libs/mpi/src/broadcast.cpp" ...failed gcc.compile.c++ bin.v2/libs/mpi/build/gcc-2.95.4/release/threading-multi/broadcast.o... gcc.compile.c++ bin.v2/libs/mpi/build/gcc-2.95.4/release/threading-multi/communicator.o In file included from boost/serialization/nvp.hpp:34, from boost/serialization/serialization.hpp:24, from boost/archive/detail/oserializer.hpp:64, from boost/mpi/detail/mpi_datatype_oarchive.hpp:12, from boost/mpi/detail/mpi_datatype_cache.hpp:13, ========================================================================= Almost all compilations for MPI are failing with similar error. It seems some C++ support is not there. I am new to C++ and Boost. Any help will be of great help. Dheeraj Gautam

3 2

Serialization of boost::thread::detail::singleton
by Campbell Morrison 30 Apr '08

30 Apr '08

I need to serialize a singleton, but have no idea how to go about it. I have made several attempts to date with very little success. I am new to using Boost and would greatly appreciate any help. regards, Campbell.

1 0

Question about Any usage
by Jeffery Cavallaro 30 Apr '08

30 Apr '08

I have a question about the use of Any, especially when used in a larger facility such as program_options. There doesn't seem to be a (easy) way to post-process the results of a facility that has generically stuffed a bunch of values into a list of Any's. For example, if I wanted to a program to spit out all of its options to standard out, there doesn't seem to be any hooks to extract an Any value in a generic way (e.g., as a string). Granted, I could derive a class and add methods to do so, but that doesn't work when Any is already embedded in the program_options implementation. I certainly could be missing something here. I haven't used Any or program_options yet, and trying to understand all of the possibilities from the spec-like doc is hard. How do the rest of you do such things? -- Jeffery Cavallaro, 1055 Joaquin-191A Infrastructure Engineering Google Inc. 1600 Amphitheatre Parkway Mountain View, CA 94043 650-214-2552

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[concept_check] Why does char not qualify as "Integer"?
by Peter 30 Apr '08

30 Apr '08

The statement BOOST_CONCEPT_ASSERT((boost::Integer<T>)); triggers an error if T is the type char. It does not trigger an error if T is either of type signed char or unsigned char. I can understand why it's not so easy to detect for SignedInteger or UnsignedInteger given type char, but to my understanding using type char should work with the above statement. Peter

1 0

MPL preprocessed question
by Neal Meyer 30 Apr '08

30 Apr '08

Alright I've been through the mailing list a few times, and thanks to Ovanes for the help on getting some of the mpl stuff working. Here's what I've got working so far. I built a vector100.hpp and placed it in the boost\mpl\vector and added the following to my header. #define BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #define BOOST_MPL_LIMIT_VECTOR_SIZE 100 #include "boost/mpl/vector.hpp" #undef BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #undef BOOST_MPL_LIMIT_VECTOR_SIZE Great everything works great, except for the fact that it takes an extra long time to compile. So following some threads on the list, I'd like to pregenerate a header file with the definitions for the vector that takes 100 elements. Placed the vector100.cpp in the \libs\mpl\preprocessed\vector and ran the preproces.py and got the vector100.hpp file generated in boost\mpl\vector\aux_\preprocessed\plain. Everthing seems like I'm heading in the right direction to get it proprocessed. So know what do I do to get it included in the same way as the previous code? I've tried including the new header directly and playing around with various macros to get it to be included, but no dice so far. Is there a way to have the preprocessing scripts regenerate the vector.hpp in boost\mpl\aux_\preprocessed\plain? So that I can use boost::mpl::vector instead of a version with the number of parameters in it, because that's varies dramatically throughout how this code is being used and would be a major pain. -Neal

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[gil] [announcement] New IO lib
by Christian Henning 30 Apr '08

30 Apr '08

Hi there, over the past few months I have been working on a new version of gil's io extension. In this release I've added support for: * more image formats, most importantly bit_aligned images ( like 1bit images ), * reading of subimages like one row at a time for huge images, * reading image information, only. * having a unified interface for all sorts of devices, subimages, and converter objects. So far, png, jpeg, and tiff images are supported. In the not so distant future there will be bmp and pnm images added. You can grab the current version via subversion from: https://gil-contributions.googlecode.com/svn/trunk/gil_2/boost/gil/extensio… If desired I can supply a zip file to the vault. The images libraries can be grabbed from: ftp://ftp.uu.net/graphics/jpeg/jpegsrc.v6b.tar.gz ( www.ijg.org isn't responding ) http://www.libpng.org/pub/png/libpng.html http://www.libtiff.org/ It's highly advised to built your own version of the image lib you need. I installed the GNU's binaries for Windows, but unfortunately, I only had problems with them. The library is still header-only. When using boost::filesystem's paths, of course, you add a dependency to the filesystem lib. The Read Interface ------------------------ Reading an image can be done in multiple ways depending on what your need is. Like the old io lib there are 4 different ways of reading images. As there are: * read_image: Read image, the right amount of memory will be allocated beforehand. The supplied image type needs to be compatible with actual image file. * read_view: Read image, the image's memory must be already allocated. The supplied image type needs to be compatible with actual image file. * read_and_convert_image: Same as read_image, but the user can specify an color converter. * read_and_convert_view: Same as read_view, but the user can specify an color converter. There is a new function for reading image information. Since every image format has it's own set of tags, the library defines seperate image_read_info<format_tag> structures. Please see, for instance, the jpeg_tags.hpp header. As for the function parameters the following sections in the same order. 1. String for file name ( std::string, std::wstring, char*, boost::filesystem::path ) OR devices ( FILE*, TIFF*, std::ifstream ) 2. Image or view type 3. Optional: Subimage definition ( top_left corner + dimensions ) 4. Optional: Color converter. This parameter is only valid for converting functions. The default parameter is gil's default_color_converter 5. Format Tag. Reading the image information only takes parameter 1 and 5. Here are some examples for reading images: #include <boost/gil/extension/io_new/jpeg_read.hpp> // Read image information std::string filename( "..\\test_images\\jpg\\found online\\test.jpg" ); image_read_info< jpeg_tag > info = read_image_info( filename, tag_t() ); // Read image FILE* file = fopen( filename.c_str(), "rb" ); rgb8_image_t img; read_image( file, img, tag_t() ); // Read image ifstream in( filename.c_str(), ios::in | ios::binary ); rgb8_image_t img( 136, 98 ); read_view( in, view( img ), tag_t() ); // Read and convert image, use gil's default converter. rgb8_image_t img; read_and_convert_image( filename, img, tag_t() ); // Read a 10x10 subimage, starting from the top_left corner. rgb8_image_t img; read_image( filename, img, point_t( 0,0 ), point_t( 10, 10 ), tag_t() ); I have created some header files to support the old read interface. For example: #include <boost/gil/extension/io_new/jpeg_io_old.hpp> std::string filename( "..\\test_images\\jpg\\found online\\test.jpg" ); rgb8_image_t img( 136, 98 ); jpeg_read_view( filename, view( img ) ); The Write Interface --------------------------- The write interface is a much simpler than the read interface. Here, we only have write_view as the entry point. As for parameters the following sections are supported: 1. String for file name ( std::string, std::wstring, char*, boost::filesystem::path ) or devices ( FILE*, TIFF*, std::ofstream ) 2. View type 3. Optional: image_write_info< FormatTag > 4. Format type The image_write_info<...> structure defines a format specific properties which can be used when writing an image. A good example is jpeg's image quality value. Examples: #include <boost/gil/extension/io_new/tiff_write.hpp> // Write image string filename( "..\\test\\tiff\\test1.tif" ); gray8_image_t img( 320, 240 ); write_view( filename, view( img ), tiff_tag() ); // Write image string filename( "..\\test\\tiff\\test2.tif" ); TIFF* file = TIFFOpen( filename.c_str(), "w" ); rgb8_image_t img( 320, 240 ); write_view( file, view( img ), tag_t() ); I have created some header files to support the old write interface. For example: #include <boost/gil/extension/io_new/tiff_io_old.hpp> string filename( "..\\test\\tiff\\test3.tif" ); gray8_image_t img( 320, 240 ); tiff_write_view( filename, view( img ) ); Supported image formats ------------------------------------- In the process of developing the new version I tried to include as many formats as possible. One consequence is a much higher compilation time. Hopefully, a design review by the community can hint me better ways to reduce it. Also, there are still holes in the support. Most noteably is TIFF, since it can support almost everything. This makes it very hard not to have code explosion during compilation. Here is a list of list of supported formats: TIFF: * Number of samples: 1, 3, 4 ( eg. RGB would be 3 ) * Bits per sample: 1, 2, 4, 8, 16, 32, 64 * planar and interleaved images * indexed images. Indices can be of 1, 2, 4, 8, or 16 bit depth, whereas the palette must a rgb16_image_t. PNG: * gray, gray_alpha, rgb, rgba * bit_depth can be 1, 2, 4, 8, 16 JPEG: * gray, rgb, cmyk, ycck ( will be read as cymk ) Please note, that I'm still in process of testing all these different formats. The primary goal of this new version is to eventually replace the old io library which is part of boost's distribution. Do I need to apply for a review? I'm not sure how to go from here. I know there is still some work to do before a possible review. Documentation is lacking and support for dynamic image needs to be added. But what I want for now is to get some feedback on design and implementation. I would like to thank Lubomir Bourdev and Andreas Pokorny for their most valueable input. Thanks, Christian

2 2

Boost CGI
by Brad 29 Apr '08

29 Apr '08

What is the current status of Darren Garvey CGI library? I am starting a CGI project and am wondering whether this is mature enough for the job? At the moment I am only looking at CGI but I may need FastCGI, etc. at a later date. My current opinion from looking at the source downloaded from http://cgi.sourceforge.net is that it will be suitable. Anyone know of any alternatives? Darren, are you still working on this? I noticed the site says you had some study to get out of the way, we've all been there ;-) Cheers, Brad

3 3

[iostreams] Prepending and appending output data in a filter
by Edward Diener 29 Apr '08

29 Apr '08

I have a filter, derived from multichar_output_filter, in which I am both prepending data and appending data. In other words the data being written to the sink will be greater than the data being passed into the filter's 'template<typename Sink> std::streamsize write(Sink& dest, const char* s, std::streamsize n)' member function, which my filter is implementing. Is this an allowable use of filters ? Do I still return the 'n' streamsize data being passed in or do I return the actual length of the data being written ? Can I use the 'template<typename T> std::streamsize write( T& t, const typename char_type_of<T>::type* s, std::streamsize n );' function to write the data, or do I need to 'put' each character to the sink using the 'template<typename Sink> void put(Sink& snk, typename char_type_of<Sink>::type c);' function instead ?

2 1

accumulator problem on visual studio 7.1
by Abir Basak 29 Apr '08

29 Apr '08

Hi, Is the boost accumulators library has too deep nesting in template declaration ? I am very interested to use it, but it increases the compile time drastically (with the inclusion of header #include <boost/accumulators/statistics.hpp> and sometimes it gives \boost\boost\lambda\detail\lambda_traits.hpp(53) : fatal error C1204: compiler limit : internal structure overflow, even for a simple program like computing mean of 3 numbers. So it seems there is a very deep template recursion which exceeds the compiler template substitution limit. Has anyone faced this kind of problem ? using the boost svn head version & MSVC 7.1 thanks abir -- Abir Basak, Member IEEE B. Tech , IIT KGP Software Engineer, Read Ink Technologies

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[serialization] serialization/utility.hpp missing include of xpressive/xpressive.hpp
by Sancho McCann 29 Apr '08

29 Apr '08

Anyone else agree this is a problem? I was trying to compile this simple program: #include <boost/numeric/ublas/vector_sparse.hpp> #include <boost/numeric/ublas/io.hpp> #include <iostream> int main(int argc, char** argv) { using namespace boost::numeric::ublas; mapped_vector<double> v(3,3); for ( unsigned i = 0; i < v.size(); ++i ) v(i) = i; std::cout << v << std::endl; return 0; } and the include hierarchy ends up including serialization/utility.hpp. This file uses the template mpl::and_, so I think it should include xpressive/xpressive.hpp. Sancho

1 0

[interprocess] shared memory containing a vector of unions of strings/integers/doubles
by Jason Sachs 29 Apr '08

29 Apr '08

I'm trying to wrap my head around how I would implement a vector of unions of strings/integers/doubles in shared memory. (for those familiar with Micro$oft COM, this would essentially be a SAFEARRAY of VARIANTs) I got a quick example of shared memory working & seem to have a decent handle on the basics. I guess there are two things that I'm not quite confident in: (1) how to make a containable element work nicely within shared memory, e.g. if I have a structure S that needs to allocate shared memory dynamically during its lifetime (and automatically deallocate upon destruction), how do I store the allocator? (or do I?) If I allocate the memory myself and store it in an offset_ptr<>, I can do that, but I need it to manage the shared memory itself. In particular, one process may need to construct some anonymous object X within the shared memory segment and store the result in an offset_ptr<>, and another process may be the one destroying the memory of X later on. (2) unions or Boost.Variant that would work with shared memory-- gack! I am looking for insight both into the general case (all elements of the vector are polymorphic, vector size can vary) and the following specific case: I have a fixed-size vector, format "defined" at runtime using an array of enums that designate the type of variable that can be stored in each element of the vector. If it weren't for string support, I would just allocate a fixed-size chunk of memory rather than a vector, and do all the management within the chunk myself by calculating element size + offsets + what have you, which I've done before in other contexts. I can still do that if I can store a handle to the string (e.g. an offset into the shared memory segment?) rather than a pointer or other high-level object, so that my "vector" object becomes a class that just has to know how to allocate/deallocate memory on its own (hence question #1 still needs an answer, but I can avoid question #2). p.s. there seems to be a lot of missing methods in the documentation for shared_memory_object and managed_shared_memory (e.g. allocate(), construct(), destroy(), destroy_ptr()). Or am I missing something? http://www.boost.org/doc/libs/1_35_0/doc/html/boost/interprocess/shared_mem… http://www.boost.org/doc/libs/1_35_0/doc/html/boost/interprocess/basic_mana…

2 2

any ETA for the BoostPro Binaries 1.35?
by Daniel Önnerby 29 Apr '08

29 Apr '08

Does anyone know if there are any plans for the boost consulting to release the BoostPro Binary Installer for Visual C++ for boost 1.35? I know I can build this myself, but it's always easier when someone else does it ;) Best regards Daniel

1 0

Wrapping a nested c++ container to python
by RR 29 Apr '08

29 Apr '08

Hello I have some trouble with handling c++-container. I have these code: typedef struct foo { typedef std::vector<double> pt_coords; typedef std::vector<pt_coords> pt_list; }; foo return_foo(); Now I want to wrap these, but I don't know how! I have test this, but I think it's wrong: BOOST_PYTHON_MODULE(...) { implicitly_convertible<foo::pt_coords,tuple>(); implicitly_convertible<foo::pt_list,list>(); } By using this in Python I get: TypeError: No Python class registered for C++ class std::vector<std::vector<double, std::allocator<double> >, std::allocator<std::vector<double, std::allocator<double> > > > How to do this right? Greetings

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Re: [Boost-users] math
by Hicham Mouline 28 Apr '08

28 Apr '08

>Hicham Mouline wrote: >>> Are there libraries with class templates for the following concepts: >>> >>> . notion of mathematical function f(x1,x2,.,xn), and perhaps >>> derivation/integration >>> >>> . any-order multidim partial differential equations? >>> >>> . multidim stochastic differential equations? >Not at present, sorry, >Regards, John. If I were to attempt to implement such things, I would need to familiarize myself with boost::function maybe, boost::mpl, boost::math for special functions? I just finished reading the interesting "c++ template metaprogramming" which highlights such a large number of ideas that I will read once more. Assuming the general case of a set of stochastic processes x1....xm (X is a vector of xi): dx1 = a1(t, X) dt + b11(t,X) dW1 + b12(t,X)dW2 + .... + b1n(t,X) dWn ... dxm = am(t, X) dt + bm1(t,X) dW1 + bm2(t,X)dW2 + .... + bmn(t,X) dWn where ai: functionals of time and the state vector X bij: functionals of time and the state vector X Wj: non deterministic processes, governed by various statistical distributions (e.g. Normal) (perhaps ones listed in boost::math), with correlation matrix M n and m would have to be runtime variables in my case as the end-user might have thousands of processes. How would one model such a thing? class StochasticProcessesSet { template<class A, class B, class W> explicit StochasticProcessesSet(const std::vector<const A*>, const std::vector<const B*>, const std::vector<const W*>) { // 1. for correctness, runtime assertion that the sizes of the 3 vectors // are consistent with the system of equations above // 2. how to enforce that A and B are functionals that take the appropriate // number of arguments. // It seems impossible to mix a compile-time check on the template arguments // with the runtime variables n and m // 3. How to enforce W is one of the stat distributions } }; I would want to have special cases (perhaps for efficiency) for the above such as: 1 stochastic process dependent on n Wi with functionals dependent just on itself and time class StochasticProcess { .... }; What relationship should StochasticProcess have with StochasticProcessesSet? A final special case would be 1 process driven only by source of randomness, not n. Clearly, these first thoughts are not applicable, given than n and m need to be runtime. Regards,

1 0

[general] General how-to-use-the-library documentation?
by Jason Sachs 28 Apr '08

28 Apr '08

Is there any other general (e.g. not specific to any of the particular libraries) about compiling/linking application programs that use Boost libraries? The only one I found was this: http://www.boost.org/doc/libs/1_35_0/more/getting_started/index.html I don't see the BOOST_ALL_DYN_LINK #define mentioned anywhere (e.g. to use shared libraries rather than static libraries, define this symbol in your makefile / IDE) other than the source files themselves, and am wondering what other usage parameters I need to know about. (p.s. the links to alternative format documentation on this page http://www.boost.org/doc/libs/1_35_0/doc/html/about.html are broken and yield 404 Not Found)

1 0

Integer bounds checking with boost?
by Graham Reitz 28 Apr '08

28 Apr '08

I could have sworn I saw an example using boost to do simple numeric bounds checking. For example (silly): enum number_range {A=0,B=1,C=2,D=3,E=4,F=5,G=6,H=7}; class check_number_range { public: check_number_range(number_range a_number) { // Can this check be boostified? <--- Question located here. if ((a_number) > -1) && (a_number) < 8)) { // do something } else { throw out_of_range; } } }; thanks much, graham

1 0

[numeric_conversion] rounding
by Peter 28 Apr '08

28 Apr '08

I'm wondering how to use the numeric_conversion library to perform rounding based on types. Assume I have a double value of 3.7. If I convert it to integer, the result should be 4. If I convert it to float, the result should be 3.7. The types I want to convert from and to are both specified in a template, i.e. they form an open set of types. >From reading the numeric_conversion docs I tend to think that the library can do what I want, but I'm unable to find out how. Can anybody help? Peter

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Re: [Boost-users] [MultiIndex] re-indexing on load
by Mark Westcott 28 Apr '08

28 Apr '08

Hi Joaquin. > As you have found out, loading involves some amount of reindexing, > though the algorithm is designed to minimize this, let me summarize > how serialization of multi_index_containers is performed: > > Saving a multi_index_container internally consists in: > > 1. Saving each of the elements, in the order they are traversed > with index #0. > 2. For each index other than #0, some "readjusting" info is saved if > necessary. More on this later. > > Loading on the other hand reduces to: > > 1. Loading each element and inserting them with hinted insertion > at the end of the container: for index #0, hinting the end() position > reduces the nomber of key comparisons performed: for the rest > of key based indices, hinting end() usually does not have any impact > and insertion takes as many comparison ops as a regular insertion. > 2. After step 1 the elements in index #0 are listed in the exact > order they were originally saved, as it should be. As for the > rest of the indices, they can be differences in traversal order > for non key-based indices (sequenced and random_access) > and for ordered non-unique indices (equivalent elements will be > adjacent as ordered non-unique indices guarantee, but they might > be shuffled with respect to the original situation). The "adjusting" > info stored in saving step 2 is used here to restore the exact > original traversing order for every index of the container. > > So, to try to minimize your loading time you'd need to first make > a guess about where the most overhead lies: is it in step 1 > or step 2? Step 2 can only be significant if any of your indices > *other than #0* is of type ordered_non_unique, sequenced > or random_access. Assuming you indeed have a situation where > step 2 causes some impact, you can: > > a) if affordable, move the problematic index to position #0, so that it > won't get any adjustment later. > b) replace Boost.MultiIndex built-in serialization with the a handmade > method so as to avoid step 2 altogether. Please find attached a sketchy > implementation example of this idea. Note that this method does > not guarantee exact traversal order replication for indices other > than #0. > > In any case, do not expect spectacular improvements after applying > any of the approaches above, as more likely most of the overhead > comes from step 1 anyway. A more radical solution, but also one > with a very high impact in your application code, is to put the > multi_index_container in a memory-mapped file, so that serialization > reduces to dumping the memory segment. You can find an example > of this technique at: > > http://www.boost.org/doc/libs/1_35_0/libs/multi_index/doc/examples.html#exa… Thanks for the explanation and ideas. Based on the information you provided, I guessed that moving from hashed indices (where the hash function is relatively expensive) to sorted_non_unique (with a cheap comparison function) would improve things; and indeed that change has got the load hugely quicker. I then tried the 'poor man serialization' example that you attached. As you suspected, the performance effect of this was pretty small and so I guess it is indeed step 1 that is causing the issue (I have several ordered_non_uniques). I do like the memory mapped file idea, but as you say, the impact on the code is large; I think too large for the time being, though it may be sometime I come back to if needs be in the future. I think, for the time being at least, the performance is ok now (using ordered rather than hashed indices). Is there any chance that future versions of MI might be able to store the hashes/complete ordering whilst serializing, or is that Just Not Possible (TM)? Thanks again, Mark

2 1

portable binary archive major bugfix
by Pfligersdorffer, Christian 28 Apr '08

28 Apr '08

Hello everybody, if you're using or evaluating my portable binary archives be sure to get version 2.0 from the boost vault (http://www.boost-consulting.com/vault/) (Remeber it only works with boost 1.33 and 1.34.) Version 1.x contained a serious bug that effectively transformed most of negative integral values into positive values! For example the two numbers -12 and 234 were stored in the same 8-bit pattern and later always restored to 234. This was fixed in this version in a way that does not change the interpretation of existing archives that happend to work because there were no negative numbers - as is unfortunately the case in our application or the bug would have surfaced long ago. Archives created by version 2.0 and containing negative numbers will raise an integer type size exception when reading it with version 1.x. Thanks to Markus Frohnmaier for testing the archives and finding the bug. PS @ Robert Ramey: Your portable binary example also suffers from this bug. In fact I felt free to copy it from you ;-) Ah, I see now that you fixed it in version 1.35. Didn't think you'd bother to since you wanted to remove it completely... Regards, -- Christian Pfligersdorffer Software Engineering http://www.eos.info

1 0

Re: [Boost-users] a problem about boost::regex
by Guo Xu 28 Apr '08

28 Apr '08

Hi, John I have a string splited by "\0" ( it means {'\\','0'}, the bellow is the same ), for example: "\0xxxx\0yyyy\0zzzz\0". And there is some special situation like "\0xxx\\0\0yyy\\\0zzz\0" , you can think it is similarly to c style string, the two '\\' means a single '\' and the '\\0' is not a spliter. i want to split them in to 0) xxx\\0 1) yyy\\ c) zzz how can i do it in boost::regex? thx,all > Message: 7 > Date: Sat, 26 Apr 2008 12:52:43 +0100 > From: "John Maddock" <john(a)johnmaddock.co.uk> > Subject: Re: [Boost-users] a problem about boost::regex > To: <boost-users(a)lists.boost.org> > Message-ID: <002d01c8a794$0d593e50$eeea0352@fuji> > Content-Type: text/plain; format=flowed; charset="UTF-8"; > reply-type=original > > Guo Xu wrote: > >> a regex expression: > >> (?<=[^\\](?:\\\\)*)\\0 > >> can work well in c#, but error in boost::regex > >> why? > > Variable length lookbehind isn't supported in Boost.Regex (or in Perl for > that matter). > > Regards, John. > >

1 0

re; Boost CGI
by Brad 28 Apr '08

28 Apr '08

Forget this post, as one of the guys on IRC just pointed out, Darren has recently submitted changes via SVN so is obviously still active. Sorry for the noise guys. Cheers, Brad

1 0

[serialization] Stateful serialization
by Scott Howlett 27 Apr '08

27 Apr '08

Hello, In a recent post, I asked whether it was possible to swap deserialized pointer values for already-existing ones so I could merge the incoming data with objects already in memory. I guess the answer is no... An alternative is to serialize some other identifier instead of writing pointers, and then on de-serialization I find my existing objects via those identifiers. This works fine, but it leads to another question: How do I make my internal objects available to the deserialization routines so that they have an opportunity to look up the necessary information? Or more generally, How do I do stateful serialization / deserialization? For example, maybe I want to supply options that fine-tune how my data is serialized or deserialized. The only parameter that is passed around to all the serialization functions is the Archive, so if I want to add options or other context information, it seems like I should add this to the Archive. That's simple enough to do; I just made a wrapper Archive that can sit atop any other Archive and contain any other options / context data I need. On the one hand it seems sneaky to hijack the Archive for this purpose, but on the other hand iostreams do basically the same thing via the various ios_base calls (setf, width, precision, etc.) so maybe it's not so bad. Am I perhaps overlooking some facility already present in the serialization library? Thanks, Scott

3 3

[serialization] Making my library dll serializable
by a.gray＠atlantiscyberspace.com 27 Apr '08

27 Apr '08

Hello everyone, I'm new to boost in general, as well as to the serialization library, so I expect that I'm probably overlooking a few things. I have searched the archives, and I've seen threads that are clearly related to what I'm doing, but their approaches were a bit different than mine (ie. some had the option of including concrete classes directly). General Info: I'm using boost 1.35.0. My target platform is Windows XP. I'm building with MSVC8 SP1. What I Need: I'm building an interface-driven library (all the exposed classes are pure abstract interfaces). This library resides in its own DLL, but we can assume that it is always loaded when we're serializing data. The concrete classes in this library (not exposed) implement boost serialization support. External applications should be able to link against boost, create archives, and use them to serialize my library's objects through my library's interface pointers. What I Tried: I've attached an MSVC8 solution with a sample executable and dll. The library exposes an interface, hides a concrete implementation of the interface, and exposes a factory function for retrieving an instance. The application retrieves an instance of the class, instantiates a polymorphic binary archiver, and serializes the object through the interface pointer using the archiver. What Goes Wrong: In the release configuration, the test program appears to work. In the debug configuration, the app fails an assert (extended_type_info.cpp:74 lookup(eti) == m_self->m_map.end()). This seems to be the multiple-registration issue which has been discussed in earlier threads. Why doesn't the assertion fail in release? My Workaround: I've seen it mentioned in earlier threads that I should move the actual serialization calls into the DLL. To that end, I created a MyLibrarySerializer class which simply forwards the serialization call. This seems to work, but since I just started using this library, I can't tell if I've overlooked a better solution or if I'm introducing some obscure bugs using this method. Questions: Will my solution work the way I expect it to (Am I overlooking any major pitfalls)? Am I overlooking a better solution (Is there a way to accomplish this without introducing the MyLibrarySerializer class)? Why does my original solution appear to work in the release configuration? Threads I'm using for reference: http://thread.gmane.org/gmane.comp.lib.boost.user/8281 http://thread.gmane.org/gmane.comp.lib.boost.user/13440 http://thread.gmane.org/gmane.comp.lib.boost.user/28735 http://thread.gmane.org/gmane.comp.lib.boost.user/30837 Thanks for your time and patience, Andrew Gray

3 2

math
by Hicham Mouline 27 Apr '08

27 Apr '08

Hello, Are there libraries with class templates for the following concepts: . notion of mathematical function f(x1,x2,.,xn), and perhaps derivation/integration . any-order multidim partial differential equations? . multidim stochastic differential equations? Best rds,

2 1

boost filesystem: acessing files with their extensions
by Mohan gupta 27 Apr '08

27 Apr '08

- hello every one, can anyone please tell me is there any way to find the files in a directory with some exension say .txt,.doc, .cpp etc ......and then use them ???? all help is appreciated mohan gupta

5 12

problems linking libraries in debian linux
by Shutters, Zachary A 26 Apr '08

26 Apr '08

I followed the instructions in the getting started guide but I am still having troubles with getting the libraries linked. In the guide the way it shows to compile the second program is like this: $ c++ -I path/to/boost_1_35_0 example.cpp -o example \ -L~/boost/lib/ -lboost_regex-gcc34-mt-d-1_35 Here is how I translated that to my system: $ g++ -I /usr/local/include/boost_1_35/ boostTest2.cpp -L/usr/local/lib/ -lboost_regex-gcc41-mt But when I run this I get this error: zach@debian:~/code$ ./a.out < jayne.txt ./a.out: error while loading shared libraries: libboost_regex-gcc41-mt-1_35.so.1.35.0: cannot open shared object file: No such file or directory This file does exist, here is the listing of my /usr/local/lib directory: libboost_date_time-gcc41-mt-1_35.so libboost_date_time-gcc41-mt-1_35.so.1.35.0 libboost_date_time-gcc41-mt.so libboost_filesystem-gcc41-mt-1_35.so libboost_filesystem-gcc41-mt-1_35.so.1.35.0 libboost_filesystem-gcc41-mt.so libboost_graph-gcc41-mt-1_35.so libboost_graph-gcc41-mt-1_35.so.1.35.0 libboost_graph-gcc41-mt.so libboost_prg_exec_monitor-gcc41-mt-1_35.so libboost_prg_exec_monitor-gcc41-mt-1_35.so.1.35.0 libboost_prg_exec_monitor-gcc41-mt.so libboost_program_options-gcc41-mt-1_35.so libboost_program_options-gcc41-mt-1_35.so.1.35.0 libboost_program_options-gcc41-mt.so libboost_python-gcc41-mt-1_35.so libboost_python-gcc41-mt-1_35.so.1.35.0 libboost_python-gcc41-mt.so libboost_regex-gcc41-mt-1_35.so libboost_regex-gcc41-mt-1_35.so.1.35.0 libboost_regex-gcc41-mt.so libboost_serialization-gcc41-mt-1_35.so libboost_serialization-gcc41-mt-1_35.so.1.35.0 libboost_serialization-gcc41-mt.so libboost_signals-gcc41-mt-1_35.so libboost_signals-gcc41-mt-1_35.so.1.35.0 libboost_signals-gcc41-mt.so libboost_system-gcc41-mt-1_35.so libboost_system-gcc41-mt-1_35.so.1.35.0 libboost_system-gcc41-mt.so libboost_test_exec_monitor-gcc41-mt-1_35.a libboost_test_exec_monitor-gcc41-mt.a libboost_thread-gcc41-mt-1_35.so libboost_thread-gcc41-mt-1_35.so.1.35.0 libboost_thread-gcc41-mt.so libboost_unit_test_framework-gcc41-mt-1_35.so libboost_unit_test_framework-gcc41-mt-1_35.so.1.35.0 libboost_unit_test_framework-gcc41-mt.so libboost_wave-gcc41-mt-1_35.so libboost_wave-gcc41-mt-1_35.so.1.35.0 libboost_wave-gcc41-mt.so libboost_wserialization-gcc41-mt-1_35.so libboost_wserialization-gcc41-mt-1_35.so.1.35.0 libboost_wserialization-gcc41-mt.so libpurple.la libpurple.so libpurple.so.0 libpurple.so.0.4.1 I know this is probably a linux problem and not a boost problem, but I cannot figure it out. Any ideas?

2 1

sheduling in boost::thread
by Mohan gupta 26 Apr '08

26 Apr '08

hello everyone, can anyone please tell me how is sheduling between the threads is done in boost ::thread are there any system calls involved or just its the appilcation of repeated function calls or something else thank you mohan gupta

2 1

Complex predicates for sorting algorithms and associative containers.
by Alexander Gutenev 26 Apr '08

26 Apr '08

Hello. I was looking for a library to simplify building of simple and complex predicates for sorting. For example sort structure like this by member or by several members in specific order. struct data { int a; int b; int c; int get_b() const { return b; } }; And have std::vector<data> v to sort. Boost.Bind or Boost.Lambda can simplify sorting by one member, like this: std::sort(v.begin(), v.end(), boost::bind(&data::b, _1) < boost::bind(&data::b, _2)); But not sorting by several ones, there's no easy way to concatenate sorting predicates for usability in sorting. For example, this is illegal: std::sort(v.begin(), v.end(), (boost::bind(&data::b, _1) < boost::bind(&data::b, _2)) || (boost::bind(&data::a, _1) < boost::bind(&data::a, _2))); , because both predicate(_1, _2) and predicate(_2, _1) can be true then. So I come to solution to this problem. Sorting by a, then by b and finally by c can look like: std::sort(v.begin(), v.end(), by(get_a) || by(&data::get_b) || by(&data::c)); where get_b is member function, c is data member, and get_a is a free function defined like this: int get_a(const data& d) { return d.a; } "by" function can also take predicate, like std::greater as its second parameter. The code with "by" function and a few more examples is attached. Is there already another solution to this problem which I have missed ? If not, is my code useful for someone else ? begin 666 test.cpp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` end

1 0

[system] error_code vs error_condition
by Jonathan Biggar 26 Apr '08

26 Apr '08

The rationale for Boost.system seems to me to be less than complete. It describes error_condition as a "portable abstraction" compared to error_code, what makes an error_condition more portable or more of an abstraction than error_code completely escapes me. Can anyone enlighten me? -- Jon Biggar Floorboard Software jon(a)floorboard.com jon(a)biggar.org

1 0

[system] error_code vs error_condition
by Jonathan Biggar 26 Apr '08

26 Apr '08

The rationale for Boost.system seems to me to be less than complete. It describes error_condition as a "portable abstraction" compared to error_code, what makes an error_condition more portable or more of an abstraction than error_code completely escapes me. Can anyone enlighten me? -- Jon Biggar Floorboard Software jon(a)floorboard.com jon(a)biggar.org

1 0

a problem about boost::regex
by Guo Xu 26 Apr '08

26 Apr '08

a regex expression: (?<=[^\\](?:\\\\)*)\\0 can work well in c#, but error in boost::regex why? *example:* *regex:* (?<=[^\\](?:\\\\)*)\\0 *source:* abc\\\\0\0\\0def *split result:* [0]: abc\\\\0 [1]: \\0def

2 1

boost auto linking feature, force static link?
by Ali F 26 Apr '08

26 Apr '08

Hi. I'm using vs2008 and the way I have my project set up is that there is a common framework which I build into a static library, and this framework uses boost signals which I've built into a static library as well. The thing is that when I compile the test project that uses the framework, it tries to link with the dynamic signals library. My framework lib also doesnt try and link with the static lib of signals. I went into the auto link.hpp boost file, and saw that if _DLL is defined then it will link with dynamic lib, else it will use the static lib. I tried removing _DLL from the preprocessor visual studio defines and the same thing happens. Is there a way to force boost to auto link with the static lib? I know there's a way to force link with dynamic lib but wondering if the opposite is possible. Thanks

3 8

[Signals] Connecting to signals with bind and member functions
by Grant Patterson 26 Apr '08

26 Apr '08

Hi Folks, I'm just getting started with Boost signals (actually moving from sigc++ signals) and I'm having trouble with something that seems rather simple: #include <boost/bind.hpp> #include <boost/signals/slot.hpp> #include "dlg.hh" // includes <boost/signal.hpp> Dlg::Dlg() { boost::signal<void()> login; login.connect(boost::bind(&Dlg::Foo, this)); } void Dlg::Foo() { // stuff } In fact, I've found an example in LyX's source http://tinyurl.com/68secc that seems to do exactly what I'm doing. I get: .../boost-1.33.1/include/boost-1_33_1/boost/bind.hpp: In function 'void boost::visit_each(V&, const boost::_bi::value<T>&, int) [with V = boost::signals::detail::bound_objects_visitor, T = Dlg*]': .../boost-1.33.1/include/boost-1_33_1/boost/bind.hpp:239: instantiated from 'void boost::_bi::list1<A1>::accept(V&) const [with V = boost::signals::detail::bound_objects_visitor, A1 = boost::_bi::value<Dlg*>]' .../boost-1.33.1/include/boost-1_33_1/boost/bind/bind_template.hpp:150: instantiated from 'void boost::_bi::bind_t<R, F, L>::accept(V&) const [with V = boost::signals::detail::bound_objects_visitor, R = void, F = boost::_mfi::mf0<void, Dlg>, L = boost::_bi::list1<boost::_bi::value<Dlg*> >]' .../boost-1.33.1/include/boost-1_33_1/boost/bind.hpp:1213: instantiated from 'void boost::visit_each(V&, const boost::_bi::bind_t<R, F, L>&, int) [with V = boost::signals::detail::bound_objects_visitor, R = void, F = boost::_mfi::mf0<void, Dlg>, L = boost::_bi::list1<boost::_bi::value<Dlg*> >]' .../boost-1.33.1/include/boost-1_33_1/boost/visit_each.hpp:25: instantiated from 'void boost::visit_each(Visitor&, const T&) [with Visitor = boost::signals::detail::bound_objects_visitor, T = boost::_bi::bind_t<void, boost::_mfi::mf0<void, Dlg>, boost::_bi::list1<boost::_bi::value<Dlg*> > >]' .../boost-1.33.1/include/boost-1_33_1/boost/signals/slot.hpp:121: instantiated from 'boost::slot<SlotFunction>::slot(const F&) [with F = boost::_bi::bind_t<void, boost::_mfi::mf0<void, Dlg>, boost::_bi::list1<boost::_bi::value<Dlg*> > >, SlotFunction = boost::function<void ()(), std::allocator<void> >]' .../source_tree/dlg.cc:92: instantiated from here .../boost-1.33.1/include/boost-1_33_1/boost/bind.hpp:1208: error: no matching function for call to 'visit_each(boost::signals::detail::bound_objects_visitor&, Dlg* const&, int)' Any idea what might be causing this? Thanks! grant

1 1

Newbie question - matrix class
by Sajjad 26 Apr '08

26 Apr '08

Hello I have just installed boost library and i want to use the matrix and vector operations that are provided within the library computer graphics programming instead of creating matrix and vector classes by myself. Is there any function available with in the libbbost that linearize the 2D array so that i can use them directly to OpenGL. And i am also having trouble to create a Makefile for that to link to libboost. i attached a sample Makefile Could anyone provide me hint which library to put in the LDFLAGS so that i can use all the functionalities of libboost? Thanks in advance Regards Sajjad ***************************Makefile***************************************' CC = g++ CFLAGS = LD = cc LDFLAGS = -lGL -lglut -lGLEW PROG = volumizer SRCS = SiGaussianElimination.cpp volMain.cpp SiVector4.cpp SiVector3.cpp SiWriter.cpp SiMath.cpp SiMatrix4.cpp SiMatrix3.cpp SiClock.cpp SiDisplay.cpp SiEventHandler.cpp SiGLUtil.cpp SiAffine.cpp OBJS = $(SRCS:.cpp=.o) all: $(PROG) $(PROG): $(OBJS) $(CC) -o $@ $(OBJS) $(LDFLAGS) %.o: %.cpp $(CC) $(CFLAGS) -c $< clean: rm -f $(PROGS) *.o *~ # rule for building dependency lists, and writing them to a file # named ".depend". depend: $(RM) .depend makedepend -f- -- $(CFLAGS) -- $(SRCS) > .depend # now add a line to include the dependency list. include .depend # DO NOT DELETE

1 0

[function] template deduction issues
by Robert Dailey 25 Apr '08

25 Apr '08

Say I have a function as follows: *template< typename t_packet > void Subscribe( boost::function<void (t_packet const&)> func ) { // gSignal is a boost::signal somewhere. Assume valid. gSignal.connect( func ); }* And in some other function, I invoke Subscribe() as follows: * void MyCallback( WalkPacket const& p ) { } void MainTest() { Subscribe( &MyCallback ); }* The code above will actually not compile, since the template parameter t_packet cannot be deduced. Is there a way I can make the template deduction work?

2 5

uBLAS vs IntelMKL/AMD/SunPerf
by Hicham Mouline 25 Apr '08

25 Apr '08

hello, i am writing BLAS L3 code that i wish to be optimal on 3 CPU kinds (Intel core2, AMD k8/k10, SPARCIV+/T1/T2). There are IntelMKL, AMD perf and SUN perf library that are supposedly optimized for the respective processor. They probably (haven't looked yet) have different interfaces. Then there is uBLAS. Is uBLAS configurable to forward calls to the 3rd party lib, or should i just study these libs, and introduce myself an indirection layer? Any thoughts appreciated, rds,

3 2

[operator] Can't figure out syntax
by Peter 25 Apr '08

25 Apr '08

Assuming I have a class like the following: template <typename T> struct point : boost::additive<point<T>, T> { T x_; T y_; explicit point(T x=0, T y=0) : x_(x), y_(y) { } operator += (T offset) { x_ += offset; y_ += offset; } operator -= (T offset) { x_ -= offset; y_ -= offset; } } Now I want to change the addition and subtraction operators to allow for different types using the following template class point ... template <typename U> operator += (U offset) { x_ += offset; y_ += offset; } template <typename U> operator -= (T offset) { x_ -= offset; y_ -= offset; } ... I cannot figure out how to write the proper syntax for the boost::additive class, so that it generates the proper additional operators for all type combinations. Is that possible, at all? Thanks, Peter

2 3

shared_ptr Initial Assignment
by Lex Fridman 25 Apr '08

25 Apr '08

Hi, Say I have a class definition: class Foo() {...}; And an instance of that class: Foo fooInstance; I would like to create a shared_ptr pointing to this instance of Foo. Most documentation recommends the following way to do it: shared_ptr<Foo> bla(new Foo(fooInstance)); But can I also do this: shared_ptr<Foo> bla; bla = shared_ptr<Foo>(new Foo(fooInstance)); Are there any problems with the second (or the first) method? Thanks, Lex

5 6

[MultiIndex] re-indexing on load
by Mark Westcott 25 Apr '08

25 Apr '08

Hi, Loading a multi_index_container from an archive seems to be involving a re-index of that archive. I'm setting breakpoints on my key extract functions, and they're getting called when i load the container from the archive. I would have thought that the serialization would mimic the copy constructor in this respect, and not do any re-indexing? This is causing me significant performance problems at the moment. Is there any workaround? Thanks, Mark

2 1

[serialization] binary woes...
by Robert Bielik 25 Apr '08

25 Apr '08

Just broke into a cold sweat... the binary i/o archives... are they byte order dependent? TIA /R

2 1

[filesystem] basic_path question
by Robert Dailey 25 Apr '08

25 Apr '08

Hi, I create the following object: boost::filesystem::path mypath( "SomeFolder/OnWindows/SubFolder" ); In Microsoft Windows, the standard slash direction is "\", so when I run the above in the debugger, I notice m_path is still using forward slashes ("/"). I would have expected the slashes to be normalized. Am I misunderstanding something? How can I construct a path object like above and have it normalize the slashes? Thanks.

4 9

Re: [Boost-users] boost vs libboost naming problem with bjamcompilefor vc90
by atshoom＠apple.lu 25 Apr '08

25 Apr '08

Hi, i'm a newbie on VC++2008 express and boost and I can't make my example program to work. Same linking prob of this thread with '1>LINK : fatal error LNK1104: cannot open file 'libboost_regex-vc90-mt-gd-1_35.lib' i've run bjam with the link=static argument and now I have the 'libboost_regex-vc90-mt-gd-1_35.lib' file in my stage\lib directory but the linking problem is always the same. anyhint ? PS: i have not understood how to do the following because I am a little bit lost in VC++2008 express >> add BOOST_REGEX_DYN_LIB to the list of project defines for your VC >> project. Thank you for any help/suggestions that could help me. John Maddock wrote: Rene Rivera wrote: > John Maddock wrote: >> Phelps Williams wrote: >>>> During compilation of this project I receive link errors: >>>> LINK : fatal error LNK1104: cannot open file >>>> 'libboost_regex-vc90-mt-gd-1 _35.lib' >> >> You'll need to build with bjam link=static, *or* add >> BOOST_REGEX_DYN_LIB to the list of project defines for your VC >> project. And yes, I know we need to fix this before release!

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Re: [Boost-users] Newbie question-- how do I get a Lockable?
by Henry Holmes 25 Apr '08

25 Apr '08

Thanks, Bill. I can declare a mutex but it doesn't have the lock/unlock methods described in the documentation-- the only thing that's public is the constructor/destructor. Could I have botched my installation of boost somehow? I just got it out of synaptic, thinking that that would be the least error-prone way to go. Also, in the interest of all that "teach a man to fish" stuff so I can quit bothering you, is there a document somewhere that explains what a "concept" is in boost terms? (ie, is it a design specification for developers to work off of, or is it a pure virtual class actually described in a .hpp file somewhere?) Thanks, Henry ----- Original Message ---- From: Bill Somerville <bill(a)classdesign.com> To: boost-users(a)lists.boost.org Sent: Thursday, April 24, 2008 4:02:44 PM Subject: Re: [Boost-users] Newbie question-- how do I get a Lockable? Hi Henry, Henry Holmes wrote: > Sorry if this is a dumb question-- it looks like just about every kind > of lock/mutex I could declare in the documentation wants to be passed > a Lockable object, but I can find no such thing in any of the header > files. I have the Boost Thread library installed and am able to make > and run threads, and I have all sorts of other lock and mutex stuff > defined, it just does not seem to correspond to the documentation at > all. Am I just horribly confused about what the documentation means? > Any help is greatly appreciated. Lockable is not a type, it is a concept. Concepts are requirements a type must comply with to be used by a type or function. The Lockable concept is defined here http://www.boost.org/doc/libs/1_35_0/doc/html/thread/synchronization.html#t… .. The boost thread library provides types that implement these concepts and they may be substitued where a suitable concept is required. This is a form of polymorphism you may not be aware of. The types you may want to instantiate for your requirements are probably described here http://www.boost.org/doc/libs/1_35_0/doc/html/thread/synchronization.html#t… note that they all implement at least the Locakble concept. HTH -- Bill Somerville Class Design Limited _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

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MPL Vector item limits
by Neal Meyer 25 Apr '08

25 Apr '08

I've been searching thru the achive to try to get this to work, but haven't been able to get it to compile. I need a mpl::vector with up to 100 items. In the preprocessed headers there is a big comment that says // -- DO NOT modify by hand!. How can I regenerate these preprocessed headers with more possible items in the list. -Neal

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Newbie question-- how do I get a Lockable?
by Henry Holmes 24 Apr '08

24 Apr '08

Sorry if this is a dumb question-- it looks like just about every kind of lock/mutex I could declare in the documentation wants to be passed a Lockable object, but I can find no such thing in any of the header files. I have the Boost Thread library installed and am able to make and run threads, and I have all sorts of other lock and mutex stuff defined, it just does not seem to correspond to the documentation at all. Am I just horribly confused about what the documentation means? Any help is greatly appreciated. ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

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[smart_ptr] Sole ownership of shared_ptr?
by Joseph Thomson 24 Apr '08

24 Apr '08

Hi everyone, Over the past few days I have been trying to integrate Boost smart pointers into my system, which is basically a manager (ObjectManager) class which creates, destroys, and keeps track of instances of another class (Object). The manager keeps a std::map of instances of type shared_ptr. The manager has a createObject() method which returns a shared_ptr instance to the user, thus the user becomes an owner of the object, alongside the manager. My problem arises because I want objects to _always_ be destroyed when the manager method destroyObject() is called. I realise that part of the reason to use smart pointers is to prevent data from being deleted while a reference to it still exists, but I figure they are still worth using just for the safety aspect. My specific reasons for wanting the manager to be able to destroy the objects on command are: 1.) The manager may keep track of the objects, but the objects are used elsewhere in the system (until their destruction). 2.) I don't want to put the responsibility with the user (me!) to have to delete all references to the object in order for it to be deleted. Even if I pass back a weak_ptr, it is likely that the user will store a locked version of the pointer for convenience. 3.) I am using lua, which has no C-style "delete" command, and handles object deletion in its own time. Thus, even if all references to the object have been deleted in lua, the object may not actually be deleted straight away (unless you invoke deletion by calling collectgarbage(), which is a very messy solution). Anyway, I came up with a solution, but am not sure if there is any better or cleaner way. I am relatively new to smart pointers and the whole idea of virtual methods, so if I use the wrong terminology I apologise. Here goes: I have an abstract ObjectInterface class, which outlines all the methods that the user will access. I then have an Object class, which is of type ObjectInterface, and implements its abstract methods. The ObjectManager will, as before, create and store a map of shared_ptr references. However, instead of returning a shared_ptr to the user, the ObjectManager::createObject() method now creates a shared_ptr<ObjectHandle> which it returns to the user. ObjectManager doesn't store a reference to the handle, so the user is the sole owner of that. ObjectHandle (I'm not sure this is the correct use of the term "Handle"?) is also of type ObjectInterface, but in its constructor it takes a shared_ptr reference from the ObjectManager, which it stores internally as a weak_ptr (so that ObjectManager remains the sole owner of Object). It implements the ObjectInterface methods by forwarding calls from the user to the Object, but only if the weak_ptr hasn't expired. I am also storing a raw pointer to the Object in ObjectHandle, so that it doesn't have to call shared_ptr<>::lock() every time it needs to forward a call; I think this is reasonable to do since I never copy the pointer, and certainly won't delete it. Attached is a fully working example that I have tried to make as concise and clear as possible. Maybe my solution is the best one and my question seems stupid, or maybe there is a far simpler way and my solution seems stupid, but either way I am asking because I am unsure about this kind of thing in general. Thanks very much for any help in advance! Joe http://www.nabble.com/file/p16528658/smart_ptr_example.cpp smart_ptr_example.cpp -- View this message in context: http://www.nabble.com/-smart_ptr--Sole-ownership-of-shared_ptr--tp16528658p… Sent from the Boost - Users mailing list archive at Nabble.com.

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Serialization of multidimmensional arrays
by Jason Gorski 24 Apr '08

24 Apr '08

Hello, We have just updated to 1.35 and it seems as if serialization of multidimensional arrays is broken. In 1.34_1, the following serialization code worked fine: int ints[2][2]; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP( ints ); } In 1.35_0, I receive the following error at compile time: oserializer.hpp:489: error: invalid static_cast from type ‘const int (*)[2]’ to type ‘const int*’ I have been able to get around this by looping through the outer dimension of the array and serializing all inner arrays separately, however this solution is less than ideal. If this is in fact an issue with the library, I am highly concerned. It seems to me that this issue should have been caught during regression testing. Thanks! Jason -- Jason Gorski Research Engineer Oasis Advanced Engineering, Inc. (248)373-9800 x 269

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[multi_index] fast_pool_allocator not working with MI in 1.35?
by Filip Konvička 24 Apr '08

24 Apr '08

Hi, trying to use fast_pool_allocator in Boost 1.35 fails with MSVC 9.0; it worked well with MSVC 8.0. The following code fragment shows the error: #include <boost/multi_index_container.hpp> #include <boost/multi_index/indexed_by.hpp> #include <boost/multi_index/sequenced_index.hpp> #include <boost/multi_index/identity.hpp> #include <boost/pool/pool_alloc.hpp> using namespace boost; using namespace boost::multi_index; typedef multi_index_container<int, indexed_by<sequenced<> >, fast_pool_allocator<int> > IntSet; IntSet s; Below you can see the compiler error message. Am I doing something wrong? (From what I've seen digging through the code, it seems to me that the allocator gets rebound from int to void, which does not work for fast_pool_allocator.) Thanks, Filip C:\lib\Boost-1_35_0\include\boost-1_35\boost/pool/pool_alloc.hpp(130) : error C2182: 'reference' : illegal use of type 'void' C:\lib\Boost-1_35_0\include\boost-1_35\boost/detail/allocator_utilities.hpp(149) : see reference to class template instantiation 'boost::fast_pool_allocator<T,UserAllocator,Mutex,NextSize>' being compiled with [ T=void, UserAllocator=boost::default_user_allocator_new_delete, Mutex=boost::details::pool::default_mutex, NextSize=32 ] C:\lib\Boost-1_35_0\include\boost-1_35\boost/detail/allocator_utilities.hpp(158) : see reference to class template instantiation 'boost::detail::allocator::rebinder<Allocator>::result<Type>' being compiled with [ Allocator=boost::fast_pool_allocator<void,boost::default_user_allocator_new_delete,boost::details::pool::default_mutex,32>, Type=boost::multi_index::detail::sequenced_index_node_impl<boost::fast_pool_allocator<void,boost::default_user_allocator_new_delete,boost::details::pool::default_mutex,32>> ] C:\lib\Boost-1_35_0\include\boost-1_35\boost/mpl/eval_if.hpp(63) : see reference to class template instantiation 'boost::detail::allocator::compliant_allocator_rebind_to<Allocator,Type>' being compiled with [ Allocator=boost::fast_pool_allocator<void,boost::default_user_allocator_new_delete,boost::details::pool::default_mutex,32>, Type=boost::multi_index::detail::sequenced_index_node_impl<boost::fast_pool_allocator<void,boost::default_user_allocator_new_delete,boost::details::pool::default_mutex,32>> ] C:\lib\Boost-1_35_0\include\boost-1_35\boost/detail/allocator_utilities.hpp(170) : see reference to class template instantiation 'boost::mpl::eval_if_c<C,F1,F2>' being compiled with [ C=false, F1=boost::detail::allocator::partial_std_allocator_rebind_to<boost::fast_pool_allocator<void,boost::default_user_allocator_new_delete,boost::details::pool::default_mutex,32>,boost::multi_index::detail::sequenced_index_node_impl<boost::fast_pool_allocator<void,boost::default_user_allocator_new_delete,boost::details::pool::default_mutex,32>>>, F2=boost::detail::allocator::compliant_allocator_rebind_to<boost::fast_pool_allocator<void,boost::default_user_allocator_new_delete,boost::details::pool::default_mutex,32>,boost::multi_index::detail::sequenced_index_node_impl<boost::fast_pool_allocator<void,boost::default_user_allocator_new_delete,boost::details::pool::default_mutex,32>>> ] C:\lib\Boost-1_35_0\include\boost-1_35\boost/multi_index/detail/seq_index_node.hpp(36) : see reference to class template instantiation 'boost::detail::allocator::rebind_to<Allocator,Type>' being compiled with [ Allocator=boost::fast_pool_allocator<void,boost::default_user_allocator_new_delete,boost::details::pool::default_mutex,32>, Type=boost::multi_index::detail::sequenced_index_node_impl<boost::fast_pool_allocator<void,boost::default_user_allocator_new_delete,boost::details::pool::default_mutex,32>> ] C:\lib\Boost-1_35_0\include\boost-1_35\boost/multi_index/detail/seq_index_node.hpp(148) : see reference to class template instantiation 'boost::multi_index::detail::sequenced_index_node_impl<Allocator>' being compiled with [ Allocator=boost::fast_pool_allocator<void,boost::default_user_allocator_new_delete,boost::details::pool::default_mutex,32> ] C:\lib\Boost-1_35_0\include\boost-1_35\boost/multi_index/detail/seq_index_node.hpp(162) : see reference to class template instantiation 'boost::multi_index::detail::sequenced_index_node_trampoline<Super>' being compiled with [ Super=boost::multi_index::detail::index_node_base<int,boost::fast_pool_allocator<int>> ] C:\lib\Boost-1_35_0\include\boost-1_35\boost/multi_index/sequenced_index.hpp(95) : see reference to class template instantiation 'boost::multi_index::detail::sequenced_index_node<Super>' being compiled with [ Super=boost::multi_index::detail::index_node_base<int,boost::fast_pool_allocator<int>> ] C:\lib\Boost-1_35_0\include\boost-1_35\boost/multi_index_container.hpp(86) : see reference to class template instantiation 'boost::multi_index::detail::sequenced_index<SuperMeta,TagList>' being compiled with [ SuperMeta=boost::multi_index::detail::nth_layer<1,int,boost::multi_index::indexed_by<boost::multi_index::sequenced<>>,boost::fast_pool_allocator<int>>, TagList=boost::mpl::vector0<boost::mpl::na> ] .\relink.cpp(97) : see reference to class template instantiation 'boost::multi_index::multi_index_container<Value,IndexSpecifierList,Allocator>' being compiled with [ Value=int, IndexSpecifierList=boost::multi_index::indexed_by<boost::multi_index::sequenced<>>, Allocator=boost::fast_pool_allocator<int> ]

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Re: [Boost-users] Applying Boost license to non boost projects (e r)
by Robert Marion 24 Apr '08

24 Apr '08

> i have written some primitives to be used with Boost.Accumulators, and > i'm considering to make them available. these files are mostly *.hpp and > depend on boost headers. under what license is it preferable that I > distribute them under? Hi, That depends on your intention. The BSD style and MIT style licenses are permissive, attribution licenses. The Boost is also a permissive license. GPL and LGPL are constrained so that anyone using your code will have to make theirs open source (depending on how it is used, in the later case). If you are writing *for* Boost, the responsible thing to do is use the Boost license. If not, and you are looking for a permissive attribution license, then I suggest either the BSD or MIT style because they are commonly known. There are many other licenses, such as Apache, CDDL, etc. If you want to guarantee your code remains open source, then GPL or LGPL are a good choice (but many persons/companies will choose not to use your code if it falls under one of those licenses). Yours, Robert Marion http://www.palamida.com

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Re: [Boost-users] [iterators] NULL pointer initialization and comparison using iterator_facade
by Lang Stefan 24 Apr '08

24 Apr '08

> > > > Is it possible to construct metafunctions that allow a > function argument > > of NULL, but not any other integer value? Or at least cause > the compiler > > to call out whenever a non-NULL argument is provided? > > > > Cheers, > > Stefan > > struct convertible_from_null { > struct null_pointer_impl_t; > typedef null_pointer_impl_t > (convertible_from_null::*null_pointer_t)(); > convertible_from_null(null_pointer_t* = 0) {} > }; > > convertible_from_null test = 0; > > //convertible_from_null fail = 1; > > int main() {} > > In Christ, > Steven Watanabe > Thanks a lot, this did it! I also managed to adapt this construct to provide comparison operators for comparisons with NULL values, so all my issues have been resolved. :) So now, apart from direct pointer assignments and delete statements (which I know need to be fixed anyway) my array iterator mostly behaves like a pointer. Fortunately, thanks to Steven's suggestion, the compiler does now show up all the problematic statements. Cheers, Stefan

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How to build and use boost 1.3.3.1 in visual studio 2008
by Ie Siong Fat 24 Apr '08

24 Apr '08

How to build and use boost 1.3.3.1 in visual studio 2008, I can't build boost. Can someone explain me ? -- Regards, Ie Siong Fat

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Re: [Boost-users] [serialization]1.35problemwith explicitinstantiation
by Michael Seibt 23 Apr '08

23 Apr '08

Robert Ramey wrote: > Peter Dimov wrote: > > Robert Ramey: > >> Peter Dimov wrote: > > > >> I believe that making a *.cpp file with the macros > >> BOOST_CLASS_EXPORT(T) would be exactly equivalent to the above. > > > > Well, it depends on where the .cpp file is. If it's part of the static > > library, it will not be included by the linker because there are no > > references to it. But it is true that > > What I meant was that if you want to make sure the stuff in the > static library is linked in, just make a small *.cpp file as part > of your main program which includes the BOOST_CLASS_EXPORT > macros. > > #include "a.hpp" > #include "b.hpp" > ... > > BOOST_CLASS_EXPORT(A) > BOOST_CLASS_EXPORT(B) This *.cpp file won't be such little! If those headers contained templates each user of the static library had to compile the template instances again. (I have a multitude of executables and dynamic libraries that use the same template code.) If you have access to the object files linked into this static library you should link them directly into every using project instead of the static library (as suggested in earlier post). MSVC 2005 and 2008 have a linker option that does this trick if the static library is part of the same solution: "Use Library Dependency Inputs" at the tab "Linker | General". (I searched the options several times until I recognized that this option could be relevant...)

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[Conversion] numeric_cast from floating to integral types
by Rainer Thaden 23 Apr '08

23 Apr '08

Hi all, I just discovered (by debugging instead of reading :-() that a numeric_cast from a floating to an integral type always truncates by default, that is, 26.99999 is casted to 26. Is there a way to tell numeric_cast to use the nearest integer? Of course I can add 0.5 to my value and cast afterwards but that's definitely ugly. Thanks in advance. Best regards, Rainer

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[asio] obtaining a socket descriptor from ip::tcp::socket
by Matthias Vallentin 23 Apr '08

23 Apr '08

Hello, I would like to incorporate asio into my current project. However, I am restricted by a library that uses C-style socket descriptors to identify sockets, e.g. it contains functions similar to void foo(int fd, ...) Right now, I picture write an asio server that merely performs an asynchronous accept. Thereafter, the start() function in handle_accept() (see below) would invoke calls to the library such as foo(fd, ...) and spawn a dedicated thread per client that would gather data from the socket. void Server::handle_accept(const boost::system::error_code& e) { if (! e) { new_connection_->start(); new_connection_.reset(new Connection(...) //... In this example, asio would only be used to to handle the accept() and provide an outside interface to the rest of the application while the actual read()/write() calls are capsulated in the library. Is there a way to obtain a native socket descriptor from an ip::tcp::socket object? I am aware that mixing asio with C-style networking code totally breaks platform independence and it is generally a very ugly approach. On the other side, the C-style library would be capsulated behind one asio Server object, without interacting with the remaining application code. I appreciate any input on this issue, Matthias -- Matthias Vallentin vallentin(a)icsi.berkeley.edu pgp/gpg: 0x37F34C16

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[iostreams] write function for sink
by Edward Diener 23 Apr '08

23 Apr '08

In iostreams I am creating a sink device and implementing the write function. In certain situations I do not want to write anything to the sink. In that case should I be passing back 0 as the streamsize or some other value ? BTW clicking on 'sink' in the individual classes list brings me to the page for 'device' not 'sink'.

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Older Simpler Boost Library List
by Ray Burkholder 23 Apr '08

23 Apr '08

I see a current list of libraries at http://www.boost.org/doc/libs/1_35_0. On the old site, there was a nice table based grouping of libraries. I'm thinking it was easier to find something in the old table than on the new page. Does a 1.35.1 version of the old table style exist somewhere? -- Scanned for viruses and dangerous content at http://www.oneunified.net and is believed to be clean.

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[serialization] Re-serialization ??
by Robert Bielik 23 Apr '08

23 Apr '08

Is there a way to do a "re-serialization" of an object structure? Let's say I have a couple of objects, and I serialize them to "State A", then change a few things. Ideally, I'd like to just deserialize "State A" so that I get the objects back to that state, without boost::serialization creating new objects for me. Is it doable? (it is for an undo implementation) TIA /Rob

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Re: [Boost-users] [iterators] NULL pointer initialization and comparison using iterator_facade
by Lang Stefan 23 Apr '08

23 Apr '08

> On Tue, Apr 22, 2008 at 10:43 AM, Lang Stefan > <SLang(a)starragheckert.com> wrote: > > I have a big problem though: The project I am working on > is quite big > > and I intend to replace a particular typedef (currently > simply a pointer > > to a struct) with this iterator class. There are two kinds of > > instructions though that my iterator class currently can't > cope with: > > > > 1. Initializing a 'pointer' with NULL (in other words, I need a > > constructor with one argument of type int, but only in case that > > argument's value is 0) > > > > How about some really weird pointer type? If you did a member > function type that doesn't actually exist, you should be able to > construct with NULL, but nothing else. > Whatever you have in mind, I have no idea what you mean. Could you elaborate please? Btw., I did consider somehow introducing one of the boost smart pointer types to resolve this issue, but apparently even the smart pointers cannot directly deal with NULL values (e.g. comparison to NULL requires calling the get() method first). I could of course introduce special functions for semantically equal purposes, but that would force me to change several thousand lines of code to match the new syntax. I can think of better ways to waste my time... Is it possible to construct metafunctions that allow a function argument of NULL, but not any other integer value? Or at least cause the compiler to call out whenever a non-NULL argument is provided? Cheers, Stefan

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[iostreams]combining serialization archive with iostreams filtering_streambuf
by cpper 23 Apr '08

23 Apr '08

Hi all: I have spent a day long in finding a way of combining serialization archive with iostreams filtering_streambuf but now I encounter a strange problem, here is my code: #include <sstream> #include <boost/iostreams/device/back_inserter.hpp> #include <boost/iostreams/filtering_stream.hpp> #include <boost/iostreams/copy.hpp> #include <boost/iostreams/filter/bzip2.hpp> #include <boost/archive/binary_oarchive.hpp> #include <boost/archive/binary_iarchive.hpp> #include <boost/serialization/string.hpp> #include <boost/iostreams/stream.hpp> #include <vector> int main () { std::vector<char> store; boost::iostreams::filtering_ostreambuf out; out.push(boost::iostreams::bzip2_compressor()); out.push(boost::iostreams::back_inserter(store)); { boost::archive::binary_oarchive oa(out); oa << "abc"; // archive closed when destructors are called //out.pop ();//call before oa destroyed, crashed!!!! } out.pop ();//call after oa destroyed the behavior seems normal //out.reset (); boost::iostreams::filtering_istreambuf in; in.push(boost::iostreams::bzip2_decompressor()); in.push(boost::make_iterator_range(store)); { std::string aft; boost::archive::binary_iarchive ia(in); ia >> aft; } } if I call pop() or reset() before archive destructor called. exception in: C:\Program Files\Microsoft Visual Studio 9.0\VC\crt\src\streambuf in this member method of std::streambuf int pubsync() error message is below: Unhandled exception at 0x10499231 (msvcp90d.dll) in basic_usage.exe: 0xC0000005: Access violation reading location 0xfeeeff1e. If I call out.pop() after oa destroyed,the behavior is exactly what I want. But I just wonder why it goes in this way? Code like below { boost::archive::binary_oarchive oa(out); oa << "abc"; } out.pop ();//call after oa destroyed the behavior seems normal which appears that I have done something wrong... I'm using VS2008TS under Win2003SP2 Can anybody help?

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[serialization]
by Robert Bielik 23 Apr '08

23 Apr '08

I'm going to serialize my objects via the binary archives, since there seems to be some issues with the wide variants, I'd like to know what happens to wide strings serialized? Are they just copied verbatim, as wide char data that is? TIA /R

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Boost::interprocess, managed_mapped_file not working properly on Mac
by Martin_Thomas＠McAfee.com 22 Apr '08

22 Apr '08

I was trying to make a small program that uses Multi-Index and Interprocess work on a Mac and was convinced that I was doing something wrong until I tried the simple example in the Multi-Index docs and found it also fails to work on Mac but works on Linux. The example is here: http://www.boost.org/doc/libs/1_35_0/libs/multi_index/example/ip_allocat or.cpp and the problem is that boost::interprocess::open_or_create does not work -it only creates. I built the example, add a few books and then quit. When I restarted the app on Linux, it listed the books from the previous run but the Mac version did not manage to do the same. Running on Linux Redhat FC8 and Mac OSX 10.5 Cheers // Martin

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[extension] conflict with boost::optional
by David Matz 22 Apr '08

22 Apr '08

Hello, I have some trouble using boost::extension and boost::optional together in a project (MSVC 7.1). The compiler complains that boost::get is not an element of extensions::shared_library. Without the optional.hpp header everything works fine. It seems the for some reason the macro BOOST_EXTENSION_SHARED_LIBRARY_GET_FUNCTION isn't valid when shared_library.get<>() is called but I can't find out why. A small code snippet that reproduces the error file: test_extension_and_optional.cpp #include <boost/optional/optional.hpp> // included for some reason #include <boost/extension/shared_library.hpp> #include <boost/extension/convenience.hpp> // load_single_library void loadExtension () { boost::extensions::factory_map fm; // we don't need the following line to produce the compiler error //boost::extensions::load_single_library(fm, ".", "external_function_name"); } error: error C2039: 'boost::get': Ist kein Element von 'boost::extensions::shared_library' Thanks in advance. David -- David Matz ---------------------------- Software Developer Spatial View GmbH mail: david.matz(a)spatialview.com phone: +49 351 - 4 50 33 44 registration court: Amtsgericht Dresden, HRB 21104 managing directors: Wolfgang Opel, Jens Wiegrebe

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[python] Expose memory-aligned data types?
by Dan Fike 22 Apr '08

22 Apr '08

Using Boost.Python, is it possible to expose a C++ memory-aligned data type to Python? For example, I want to expose this data type. class __declspec(align(16)) foo { public: foo() {}; bool isAligned() { if ((int)this % 16 == 0) { return true; } else { return false; } } private: int a, b, c, d; }; I've written the following code to expose this class to Python: BOOST_PYTHON_MODULE(myModule) { boost::python::class_<foo>("foo", boost::python::init<>()) .def("isAligned", &bar.isAligned) ; } When compiling this code (MSVC 8.0, VS2005, Win32), I get the following error (entire error listed at the bottom): d:\...\boost\python\converter\as_to_python_function.hpp(21) : error C2719: 'unnamed-parameter': formal parameter with __declspec(align('16')) won't be aligned Note that I used to get a STATIC_ASSERTION_FAILURE in the type_with_alignment class definition when compiling with Boost 1.34. I found adding a 16-byte aligned struct type to the BOOST_TT_ALIGNMENT_BASE_TYPES list in type_with_alignment.hpp made the ASSERT go away, but introduced the above error. In an attempt to fix it, I downloaded Boost revision 43984 from early April, 2008, which included a patch that I thought would help me. See http://svn.boost.org/trac/boost/changeset/43984. While the type_with_alignment.hpp included in that revision did correct the STATIC_ASSERTION_FAILURE, I am still hitting the above error. Now, if I try to build the same code in x64 instead of Win32 (again, from revision 43984), I do not encounter the error. Not only does it compile, but I have verified that any objects 16-byte aligned objects I instanciate in Python are actually aligned correctly. Unsurprisingly, however, the x64 build produces the same error when I try to expose a 32-byte aligned data type. On the other hand, the Win32 build still complains if I try it with an 8-byte aligned data type. I'm hoping there is a piece of Boost.Python code missing from the class exposition that I don't know about. I've scoured the documentation and internet (and code) for such a thing, but I may have overlooked it. Any advice? -Dan Fike Here is the entire error, as printed by VS2005... d:\...\boost\python\converter\as_to_python_function.hpp(21) : error C2719: 'unnamed-parameter': formal parameter with __declspec(align('16')) won't be aligned d:\...\boost\python\to_python_converter.hpp(88) : see reference to class template instantiation 'boost::python::converter::as_to_python_function' being compiled with [ T=foo, ToPython=boost::python::objects::class_cref_wrapper>> ] d:\...\boost\python\to_python_converter.hpp(82) : while compiling class template member function 'boost::python::to_python_converter::to_python_converter(void)' with [ T=foo, Conversion=boost::python::objects::class_cref_wrapper>>, has_get_pytype=true ] d:\...\boost\python\object\class_wrapper.hpp(26) : see reference to class template instantiation 'boost::python::to_python_converter' being compiled with [ T=foo, Conversion=boost::python::objects::class_cref_wrapper>>, has_get_pytype=true ] d:\...\boost\python\object\class_metadata.hpp(272) : see reference to class template instantiation 'boost::python::objects::class_cref_wrapper' being compiled with [ Src=foo, MakeInstance=boost::python::objects::make_instance> ] d:\...\boost\python\object\class_metadata.hpp(229) : see reference to function template instantiation 'void boost::python::objects::class_metadata::maybe_register_class_to_python(T2 *,boost::mpl::false_)' being compiled with [ T=foo, X1=boost::python::detail::not_specified, X2=boost::python::detail::not_specified, X3=boost::python::detail::not_specified, T2=foo ] d:\...\boost\python\object\class_metadata.hpp(219) : see reference to function template instantiation 'void boost::python::objects::class_metadata::register_aux2>(T2 *,Callback)' being compiled with [ T=foo, X1=boost::python::detail::not_specified, X2=boost::python::detail::not_specified, X3=boost::python::detail::not_specified, T2=foo, Callback=boost::integral_constant ] d:\...\boost\python\object\class_metadata.hpp(217) : while compiling class template member function 'void boost::python::objects::class_metadata::register_aux(void *)' with [ T=foo, X1=boost::python::detail::not_specified, X2=boost::python::detail::not_specified, X3=boost::python::detail::not_specified ] d:\...\boost\python\class.hpp(174) : see reference to class template instantiation 'boost::python::objects::class_metadata' being compiled with [ T=foo, X1=boost::python::detail::not_specified, X2=boost::python::detail::not_specified, X3=boost::python::detail::not_specified ] d:\...\boost\python\class.hpp(205) : see reference to class template instantiation 'boost::python::class_::id_vector' being compiled with [ W=foo ] d:\...\MyProject\my_project_python_modules.h(77) : see reference to function template instantiation 'boost::python::class_::class_>(const char *,const boost::python::init_base &)' being compiled with [ W=foo, DerivedT=boost::python::init<> ]

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[iterators] NULL pointer initialization and comparison using iterator_facade
by Lang Stefan 22 Apr '08

22 Apr '08

Hello list, I have created a generic iterator template class for arrays that also doubles as container-wrapper for the array in question. To achieve this I have based my class on boost::iterator_facade . I have defined all the neccessary functions as described in the documentation and mostly the iterators work as intended. Here's a cut-down version: #include <boost/type_traits/is_convertible.hpp> #include <boost/utility/enable_if.hpp> #include <boost/iterator/iterator_facade.hpp> template<class Value> class cArrayIterator : public boost::iterator_facade< cArrayIterator<Value> , Value , boost::random_access_traversal_tag > { private: struct enabler {}; public: cArrayIterator() : first(0),size(0),position(0) {} cArrayIterator(Value* _first, difference_type _size, difference_type _position = 0) : first(_first),size(_size),position(_position) {} template<class OtherValue> cArrayIterator( const cArrayIterator<OtherValue>& other , typename boost::enable_if< boost::is_convertible<OtherValue*,Value*> , enabler >::type = enabler() ) : first(other.first),size(other.size),position(other.position) {} private: Value* first; difference_type position; difference_type size; friend class boost::iterator_core_access; void advance(difference_type n){ position += n; } void decrement(){ --position; } Value& dereference() const{ return first[position]; } template<class OtherValue> difference_type distance_to(const cArrayIterator<OtherValue>& z) const{ return z.position - this->position; } template<class OtherValue> bool equal(const cArrayIterator<OtherValue>& other) const{ return this->first + this->position == other.first + other.position; } void increment(){ ++position; } }; I have a big problem though: The project I am working on is quite big and I intend to replace a particular typedef (currently simply a pointer to a struct) with this iterator class. There are two kinds of instructions though that my iterator class currently can't cope with: 1. Initializing a 'pointer' with NULL (in other words, I need a constructor with one argument of type int, but only in case that argument's value is 0) 2. Comparing a 'pointer' to NULL (again, comparison to int argument, but only makes sense for the value 0) I did add a constructor with only one argument (of type pointer to the underlying object's type) and could eliminate problem 1. However I feel it's not quite right, since for my array iterator it doesn't make any sense to initialize it with just one pointer and no further information (it requires pointer to first element, position, and size of array), so in cases where the pointer argument is not NULL this constructor shouldn't even be available! Here's the code for the new constructor: cArrayIterator(Value* _first) // workaround : first(_first),position(0) { if (NULL == _first) size = 0; else size = 1; // not really sensible, but the best I can think of atm } Moreover, I hoped this constructor would also eliminate problem 2 by implicitely converting the int value of 0 to a NULL iterator, but it didn't. I tried to provide my own comparison operators, but so far failed to meet the syntax the compiler would recognize as a fit for a comparison int to iterator. This is what I got so far: template <class Value> bool operator==(cArrayIterator<const Value> const left, cArrayIterator<Value> const right) { return false;// I'll take care of that once the function gets actually called :/ } How do I correctly define a comparison operator that compares a 'NULL pointer' to a class representing a pointer? Or does iterator_facade already provide a way to deal with this? Stefan

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