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Questions about Boost.ProgramOptions
by Elisha Berns 31 May '05

31 May '05

Hi, I have a few questions about Boost.ProgramOptions pertaining to parsing an argv that is of wchar_t data type. The first thing that isn't clear from the examples is whether it's possible at all. The second thing that isn't clear is how to do it and store string values in std::wstring variables. Here are the specifics: 1) How do you use program_options with an argv argument that is a wchar_t data type? Like this? variables_map vm; store(parse_command_line<wchar_t>(argc, argv, desc), vm); but then the question is how do you store any of the command line values in wstring variables? Like this? options_description desc("allowed options"); desc.add_options() // First parameter describes option name/short name // The second is parameter to option // The third is description ("help,h", "print usage message") ("validate,v", value(&strFile), "validate xml file"); // strFile is a wstring Well that doesn't work. 2) I am getting 3 link errors when trying the above: ToolsTest.obj : error LNK2019: unresolved external symbol "void __cdecl boost::program_options::store(class boost::program_options::basic_parsed_options<unsigned short> const &,class boost::program_options::variables_map &)" (?store@program_options@boost@@YAXABV?$basic_parsed_options@G@12@AAVvari ables_map@12@@Z) referenced in function _main ToolsTest.obj : error LNK2019: unresolved external symbol "public: __thiscall boost::program_options::basic_parsed_options<unsigned short>::basic_parsed_options<unsigned short>(class boost::program_options::basic_parsed_options<char> const &)" (??0?$basic_parsed_options@G@program_options@boost@@QAE@ABV?$basic_parse d_options@D@12@@Z) referenced in function "public: class boost::program_options::basic_parsed_options<unsigned short> __thiscall boost::program_options::basic_command_line_parser<unsigned short>::run(void)const " (?run@?$basic_command_line_parser@G@program_options@boost@@QBE?AV?$basic _parsed_options@G@23@XZ) ToolsTest.obj : error LNK2019: unresolved external symbol "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl boost::program_options::to_internal(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?to_internal@program_options@boost@@YA?AV?$basic_string@DU?$char_traits @D@std@@V?$allocator@D@2@@std@@ABV?$basic_string@GU?$char_traits@G@std@@ V?$allocator@G@2@@4@@Z) referenced in function "class std::vector<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,class std::allocator<class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > > > __cdecl boost::program_options::to_internal<class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > >(class std::vector<class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> >,class std::allocator<class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > > > const &)" (??$to_internal@V?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@ @std@@@program_options@boost@@YA?AV?$vector@V?$basic_string@DU?$char_tra its@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_ traits@D@std@@V?$allocator@D@2@@std@@@2@@std@@ABV?$vector@V?$basic_strin g@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@V?$allocator@V?$basic_st ring@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@2@@3@@Z) Thanks for any help here, Elisha Berns e.berns(a)computer.org tel. (310) 556 - 8332 fax (310) 556 - 2839

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Re: Re: Serialization when using virtual inheritance
by Eric 30 May '05

30 May '05

Thanks Robert. This partially worked... Your comment about putting the BOOST_CLASS_EXPORT macro into the header keyed me into something. I am using the BOOST_CLASS_EXPORT(derived) macro, but I've been placing them into the source (cpp) file instead of the header (h) file. With my system, when I put BOOST_CLASS_EXPORT(derived) into the header file, I get a multiply-defined error at link time (the offending code is boost::archive::detail::guid_initializer<class,...> since the header is included multiple times when I use the class. As a test, I setup a sandbox with a stripped down system and was able to get it to work when I put the BOOST_CLASS_EXPORT in the header, but not when it is in the cpp file. Q: Why does the location of the BOOST_CLASS_EXPORT matter? Is it doing order-depended initialization upon bringing up the system? Q: How do I avoid the mutiple defined error in the linker? Thanks again for your help and the library :) -Eric

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Re: date time library question !!
by Saurabh Sood 30 May '05

30 May '05

thanks. Both work but i might finally decide in favor lexical_cast -ss

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Serialization when using virtual inheritance
by Eric 29 May '05

29 May '05

Boost version: 1.32.0 I am trying to use the serialization class to serialize data pointed to by the virtual base class. Note that the code works great if I don't use virtual inheritance off of the base class. Here is a quick run-down of the hierarchy and code: class Base { virtual void OneOfManyVirtuals() = 0; // Serialization Interface template<class Archive> void serialize(Archive &ar, const unsigned int version) { //empty } }; BOOST_IS_ABSTRACT(Base); class Derived : virtual public Base { virtual void OneOfManyVirtuals() { } // Serialization Interface template<class Archive> void serialize(Archive &ar, const unsigned int version) { //empty ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(Base); } } // later in the main code Base* pBase = new Derived; boost::archive::xml_oarchive oa(ofs); // doesn't work oa << BOOST_SERIALIZATION_NVP(pBase); // works oa << BOOST_SERIALIZATION_NVP(*pBase); When if fails, it fails in the oseralizer.hpp at line 419 with the comment: // convert pointer to more derived type. if this is thrown // it means that the base/derived relationship hasn't be registered I tried registering the pairs with void_cast_register, but I wasn't successful. Any real examples of how to use this method would be appreciated. So, does anyone know why the pointer to the base doesn't work when using virtual inheritance? It works find when I remove the virtual from the inheritance. Unfortunately, with the software architecture that I have, there are several cases when the virtual inheritance off of interfaces is required. Any help with the matter is greatly appreciated. -Eric

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date time library question !!
by Saurabh Sood 29 May '05

29 May '05

Hi all, i am totally new to boost but more i am feeling good and bad at same time ... good coz boost is cross-platform and powerful .. however sometimes its hard to do simple things ... Take following for instance .. ------------------------------------------------------------------------------------- using namespace boost::posix_time; ptime p = = microsec_clock::local_time(); ... ... (some calculations) ... time_duration td = microsec_clock::local_time() - p; std::cout << std::string(" Total Milliseconds: ") << td.total_milliseconds() << std::endl; // Works fine ------------------------------------------------------------------------------------- But how can the value present in td.total_milliseconds() could be put inside a std::string ? It might sound simple but i guess its tricky . ... thanks for the reply in advance. cheers saurabh

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boost::thread() calls destructor!!
by Ricky Corsi 28 May '05

28 May '05

Hello, I tried to modify the sample code from Bill Kempf for boost.thread, listing 4 that I got at the following link http://www.cuj.com/documents/s=8470/cuj0205kempf/list4.htm to embed the write function in a writeClass function-object. That is a test because in a program I need to pass a function object to one thread, and not a global function. I simply wrote this code: class writerClass { public: ~writerClass() { // for Debug std::cout << "writerClass dtor" << std::endl; } void operator() () { for (int n = 0; n < ITERS; ++n) { { boost::mutex::scoped_lock lock(io_mutex); std::cout << "sending: " << n << std::endl; } buf.put(n); } } }; and changed in the main() --> boost::thread thrd2(&writer); with --> boost::thread thrd2((writerClass())); Everything works the same, but I have the destructor of wirterClass called 4 times, when constructing thrd2!!! That's weird to me, but it's annoying because in my other program, the dtor destroys some member data, and the program crashes because of it. Why is the ~writerClass() called? is there maybe some exception thrown?? how can I solve the problem? thank you ricky P.S. if it can be useful, during the compilation I get a warning (MSVC 7.1), but I read that it can be safely ignored: warning C4275: non dll interface class "boost::noncopyable_::noncopyable" used as a base for dll interface class "boost::mutex" [...]\boost\noncopyable.hpp(22): see declaration of "boost::noncopyable_::noncopyable" [...]\boost\thread\mutex.hpp(33): see declaration of "boost::mutex"

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date serialization fails with non-standard locales
by Paolo Coletta 28 May '05

28 May '05

I'm not sure if this is a bug or if I'm misusing the library. It seems that serializing boost::posix_time_ptime fails when using non-standard locale (Windows Xp OS - vc 7.1 compiler - boost updated from CVS few days ago). As an example, try adding std::locale::global( std::locale( "en" ) ); as the first line of the testtime_serialize.cpp; this causes the test to fail when doing ia >> pt2; I tried to understand what was happening, and it seems to me that the problem is in keeping into account locale when serializing, while ignoring it while unserializing. In greg_serialize.hpp to_iso_string(d) may generate something like "2,0050527"; the method from_undelimited_string(ds) used to load the serialized date, expects a 4,2,2 format. Paolo

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Re: [Boost-users] Re: building and installing boost
by TBoafo＠aol.com 28 May '05

28 May '05

Hi Dave, 1. I dont have BOOST_ROOT defined in my environment. 2. I still get messages with loading jam files when I try C:\temp\boost_1_32_0>bjam -sBOOST_ROOT=."-sTOOLS=vc-7_1" install --------------------------------------------------------------------- skipping Boost.Python library build due to missing or incorrect configuration couldn't find Python.h in "c:/tools/python/include" You can configure the location of your python installation by setting: PYTHON_ROOT - currently "c:/tools/python" PYTHON_VERSION - The 2-part python Major.Minor version number (e.g. "2.2", NOT "2.2.1") - currently "2.2" The following are automatically configured from PYTHON_ROOT if not otherwise set: PYTHON_LIB_PATH - path to Python library object; currently "c:/tools/python/libs" --------------------------------------------------------------------- Jamfile:247: in load-jamfiles *** argument error * rule stage ( name : sources + : requirements * : local-build * ) * called with: ( include/boost-1_32 : : <locate>C:\Boost <tree-subdirs>C:\temp\ boost_1_32_0 <target>install : ) * missing argument sources C:\temp\boost_1_32_0\tools/build/v1\boost-base.jam:2306:see definition of rule ' stage' being called C:\temp\boost_1_32_0\tools\build\v1\bootstrap.jam:21: in boost-build C:\temp\boost_1_32_0\boost-build.jam:16: in module scope 3. I can't see any files as per your instructions in c:\boost. cd boost DIR compatibility\cpp_c_headers\c* DIR *.hpp *.ipp *.h *.inc 4. If I try to download a fresh boost download which version should I download for this to work with vc 7.1? Regards Theo

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serialization trouble with boost when overloading the Allocator of string
by Olivier Vanden Bos 27 May '05

27 May '05

namespace TEST{ typedef std::basic_string<char, std::char_traits <char>, TEST_Allocator<char> > string; } boost\boost\serialization\access.hpp(106) : error C2039: 'serialize' : is not a member of 'std::basic_string<_Elem,_Traits,_Ax>' with [ _Elem=char, _Traits=std::char_traits<char>, _Ax= TEST_Allocator <char> ] Looking in the string.h template<class Archive, class U, class Allocator> inline void serialize( Archive & ar, STD::basic_string<U, Allocator> & t, const unsigned int file_version what is strange is when I look at my definition of basic_string in the file xstring of .NET 2003 I found template<class _Elem, class _Traits = char_traits<_Elem>, class _Ax = allocator<_Elem> > class basic_string : public _String_val<_Elem, _Ax> Any idea ? - VDB - "LNK2019: unresolved external symbol" Olivier Vanden Bos MSN#TheVdeub(a)hotmail.com AI Programmer UBISOFT Montreal

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boost::lexical_cast and special allocator
by Olivier Vanden Bos 27 May '05

27 May '05

I just discover that there is no way to change the allocator used in the streambuf of lexical_cast. It's not a big issue, but perhaps I could be a good improvement for this simple template ? - VDB - "LNK2019: unresolved external symbol" Olivier Vanden Bos MSN#TheVdeub(a)hotmail.com AI Programmer UBISOFT Montreal

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Can you compare boost::function objects?
by Stuart Dootson 27 May '05

27 May '05

I'm not certain (from the documentation) whether see if two boost::function objects are equal (I tend to think not!). The code below doesn't compile on VC7.1, raising an error about 4 ambiguous overloads of operator== #include <boost/function.hpp> int Flip() { return 2; } int main(int,char**) { boost::function<int()> f1 = &Flip; boost::function<int()> f2 = &Flip; bool const areTheyEqual = (f1 == f2); } Can someone confirm if this should/should not compile, please? Stuart Dootson

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Re: [Boost-users] Re: building and installing boost
by TBoafo＠aol.com 27 May '05

27 May '05

Dave, How do I resolve my problem? Regards Theo

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Re: [Boost-users] Re: building and installing boost
by TBoafo＠aol.com 26 May '05

26 May '05

I copied the boost installation zip file for windows the boost_1_32 zip file to c:\temp. The zip file was then expanded to c:\temp\boost_1_32_0. If one follows the instructions for building bjam from c:\temp\boost_1_32\tools\build\jam_src\ a bjam.exe gets created in c:\temp\boost_1_32_0\tools\build\jam_src\ bin.ntx86. I dont have any boost set up in the environment path. I have copied the bjam.exe to c:\windows\system32. I then type the boost install command below as per boost building instructions for visual c++ 7 as per below. C:\temp\boost_1_32_0>bjam "-sTOOLS=vc-7_1" install Regards Theo

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Boost serialization performance.
by Graham 26 May '05

26 May '05

I am rather new to Boost. I apologize in advance if I miss a protocol or two in the group. Please correct me. My group is considering using Boost for an application and some members have expressed concern over the performance of Boost serialization because a stack dump showed an excess of 100+ calls for a simple example shown below. Is there a good resource that shows the relative performance of Boost serializations? Code example: (Windows XP, MSVS 2003) Around 389 bytes where serialized. **example: (it's not pretty but it gets the job done) void save_schedule(const bus_schedule &s, const char * filename) { std::ostringstream ss(std::ios::binary); // make an archive std::ofstream ofs("perf.txt"); // output file LARGE_INTEGER start, finish, diff, frequency; // windows junk double duration; // duration char buff[256]; // adjust priority so high no one can interrupt! SetThreadPriority( GetCurrentThread() ,THREAD_PRIORITY_TIME_CRITICAL ); // perform timed test QueryPerformanceCounter(&start); boost::archive::binary_oarchive oa(ss); oa << s; QueryPerformanceCounter(&finish); QueryPerformanceFrequency(&frequency); // compute results diff.QuadPart = finish.QuadPart - start.QuadPart; duration = ((double)diff.QuadPart)/(frequency.QuadPart) ; sprintf( buff, "%f seconds\n", duration ); ofs<<buff; } **results: debug: 0.001636 seconds release: 0.000712 seconds Thanks in advance for an assistance. Graham

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building and installing boost
by TBoafo＠aol.com 26 May '05

26 May '05

I am trying to build and install boost libary on a laptop with OS Windows XP and Visual Studio.net and I am not sure its working as I am getting the following messages. C:\temp\boost_1_32_0>bjam "-sTOOLS=vc-7_1" install --------------------------------------------------------------------- skipping Boost.Python library build due to missing or incorrect configuration couldn't find Python.h in "c:/tools/python/include" You can configure the location of your python installation by setting: PYTHON_ROOT - currently "c:/tools/python" PYTHON_VERSION - The 2-part python Major.Minor version number (e.g. "2.2", NOT "2.2.1") - currently "2.2" The following are automatically configured from PYTHON_ROOT if not otherwise set: PYTHON_LIB_PATH - path to Python library object; currently "c:/tools/python/libs" --------------------------------------------------------------------- Jamfile:247: in load-jamfiles *** argument error * rule stage ( name : sources + : requirements * : local-build * ) * called with: ( include/boost-1_32 : : <locate>C:\Boost <tree-subdirs>C:\temp\ boost_1_32_0 <target>install : ) * missing argument sources C:\temp\boost_1_32_0\tools/build/v1\boost-base.jam:2306:see definition of rule ' stage' being called C:\temp\boost_1_32_0\tools\build\v1\bootstrap.jam:21: in boost-build C:\temp\boost_1_32_0\boost-build.jam:16: in module scope C:\temp\boost_1_32_0> Regards Theo

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RE: [Boost-users] regex_match problem
by Wilkinson, John 26 May '05

26 May '05

> > const string float_regex = > > "([+-]?(([\\d]+\\.?)|(\\.[\\d]+)|([\\d]+\\.[\\d]+))){0,1}"; > > All of your groups are "capturing", which would explain all of the > extra matches you get. You should make all but the outermost group in > float_regex non-capturing using "(?:" instead of "(". Thanks that explains it. I was searching for such a switch but assumed it would be in regex_match. John W.

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RE: [Boost-users] Searching through a multi_array[_ref] using STLalgorithms
by Sohail Somani 25 May '05

25 May '05

> -----Original Message----- > > Hi, > > I would like to do the following: > > multi_array<double,2> a(boost::extents [ extent_range(1,361)] > [ extent_range(1,3)]); > ... > multi_array<double,2>::iterator i = > std::find(a.begin(),a.end(),_1[2]==50.); > > That is, I want to find the row where the second column is > 50. Since lambda can't be used like this, how would you > propose I do this in a syntactically concise manner? std::find_if Doh.

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Searching through a multi_array[_ref] using STL algorithms
by Sohail Somani 25 May '05

25 May '05

Hi, I would like to do the following: multi_array<double,2> a(boost::extents [ extent_range(1,361)] [ extent_range(1,3)]); ... multi_array<double,2>::iterator i = std::find(a.begin(),a.end(),_1[2]==50.); That is, I want to find the row where the second column is 50. Since lambda can't be used like this, how would you propose I do this in a syntactically concise manner? Thanks Sohail

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regex_match problem
by Wilkinson, John 25 May '05

25 May '05

I am trying to use regex to parse NMEA messages. I am new to regex and regular expressions in general, and am having problems getting regex_match to do what I want. The code below demonstrates the problem. I was hoping it would return: 1 1.2,3.4 2 1.2 3 3.4 instead it returns: 1 1.2,3.4 2 1.2 3 1.2 4 5 6 1.2 7 3.4 8 3.4 9 10 11 3.4 thanks John W. const string float_regex = "([+-]?(([\\d]+\\.?)|(\\.[\\d]+)|([\\d]+\\.[\\d]+))){0,1}"; const regex e( float_regex + "," + float_regex ); string str = "1.2,3.4"; smatch match; bool result = regex_match( str, match, e ); if ( result ) { for( int i = 0; i < match.size(); ++i ) { cout << i+1 << " " << match[i] << endl; } }

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CVS directories in tarballs
by Emre Turkay 25 May '05

25 May '05

Hi Folks, Why are the CVS directories are excluded from the tarball? I think it would be useful to distribute them with anonymous cvs access settings because - someone might want to get the boost library but particularly interested in the latest additions of one specific library, - one could see what is new in a particular directory/file with a "cvs diff", - and it encourages bug-fixing. Thanks, emre

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Re: [Boost-users] Building boost on AIX with GCC -- pthread problems
by Patrik Jonsson 25 May '05

25 May '05

> > > Hi - > > I'm trying to build boost on an AIX box using GCC, and am having > pthread issues. > > In particular: > > ------------------------------------------------------------------------ > $ uname -a > AIX dev-app-a00 2 5 00089FFC4C00 unknown unknown AIX > > $ gcc -v > Reading specs from > /usr/local/lib/gcc-lib/powerpc-ibm-aix5.1.0.0/3.3.3/specs > Configured with: ../gcc-3.3.3/configure --disable-nls > Thread model: aix > gcc version 3.3.3 > > $ bjam -v > Boost.Jam Version 3.1.10. OS=AIX. > [... elided copyright stuff ...] > > $ bjam > [... elided PYTHON stuff here ...] > ...found 7231 targets... > ...updating 840 targets... > gcc-C++-action > bin/boost/libs/date_time/build/libboost_date_time.so/gcc/debug/shared-linkable-true/greg_month.o > > In file included from > /home/dkatz/dev/Engine/Agorai/Boost/boost/detail/lwm_pthreads.hpp:20, > from > /home/dkatz/dev/Engine/Agorai/Boost/boost/detail/lightweight_mutex.hpp:92, > > from > /home/dkatz/dev/Engine/Agorai/Boost/boost/detail/shared_count.hpp:28, > from > /home/dkatz/dev/Engine/Agorai/Boost/boost/shared_ptr.hpp:26, > from > /home/dkatz/dev/Engine/Agorai/Boost/boost/date_time/gregorian/greg_month.hpp:14, > > from > /home/dkatz/dev/Engine/Agorai/Boost/libs/date_time/src/gregorian/greg_month.cpp:14: > > /usr/include/pthread.h:554: error: `pthread_rwlock_t' was not declared > in this > scope > /usr/include/pthread.h:554: error: parse error before `)' token > [... lots more pthread problems of this sort ...] > ^C...interrupted > $ > Hi, I got this same problem when I (accidentally) tried to build Boost with gcc 3.2. When I used 3.4, everything worked, so you might try upgrading the compiler. cheers, /Patrik > ------------------------------------------------------------------------ > **

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std::queue serialization
by beastmasterT 25 May '05

25 May '05

I am using the serialization library, and I need an interface to the std::queue class. Has anyone done this before? If I need to do it by hand, I could use a bit of guidance. I've tried to modify the deque.hpp provided, but without success. Thanks, Kyle

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RE: [Boost-users] Scoped_ptr + deleter
by Sohail Somani 24 May '05

24 May '05

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Richard Hadsell > Sent: Tuesday, May 24, 2005 7:00 AM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] Scoped_ptr + deleter > > > Caleb Epstein wrote: > > >I'm not certain, but I would guess that overhead is the reason. > >Perhaps someone more closely involved in the implementation (Peter?) > >would care to comment. > > > > > As a user of scoped_ptr and scoped_array, I expressed a > strong opinion > that its memory usage remain as is, and some Boost developers > agreed. > If you have a way to maintain the current behavior (speed and memory > footprint) as a default, you are welcome to add functionality. > Otherwise, it becomes useless to me. What about something like: #include <iostream> #include <vector> #include <algorithm> using namespace std; template <class A> struct caller { static void callme(A * d) { delete d; } }; template <class A,class caller> struct l00lz { A * p_; l00lz(A * p):p_(p) { caller::callme(p_); } }; int main() { int * a = new int(5); l00lz<int,caller<int> > b(a); return 0; } AFAIK, it wouldn't affect the speed nor memory footprint

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Just can't get started with boost testing framework
by Dave Harrison 24 May '05

24 May '05

Hi guys, I'm new to using Boost, and I'm hitting my head against what I'm pretty sure is a linking / inclusion problem. I'm trying to use the library to test code I'm writing, but I don't want to have to install the libraries onto the machine I'm compiling on (I just want a way I can have them in my code directory and include them from there). I've tried using both the unit_test_framework.hpp inclusion method, as well as linking against the built binary library, but I essentially keep hitting this problem : > g++ unit_test_example1.cpp unit_test_example1.cpp:10:55: error: boost/test/included/unit_test_framework.hpp: No such file or directory the only line in unit_test_example1.cpp is : #include <boost/test/included/unit_test_framework.hpp> In my code dir I've copied across the boost/test dir from the unzipped tar ball. Any help is greatly appreciated. Cheers Dave

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RE: [Boost-users] Scoped_ptr + deleter
by Sohail Somani 24 May '05

24 May '05

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Caleb Epstein > Sent: Monday, May 23, 2005 2:32 PM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] Scoped_ptr + deleter > > > On 5/23/05, Sohail Somani <s.somani(a)fincad.com> wrote: > > Why doesn't scoped_ptr have an additional template > parameter to accept > > a deleter? > > Because that would make it larger than sizeof (T*). I > believe the general consensus on this is to use shared_ptr or > perhaps the upcoming policy_ptr. For educational purposes, why is this important?

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transmute_iterator
by Louis Lavery 24 May '05

24 May '05

I'm looking for a transforming iterator. I've looked at the boost transform_iterator but it doesn't quite do what I want. Well, in fact it does a little too much, it passes the dereferenced base iterator to the transform function - I would like it to pass the base iterator itself. The reason being is that the transform function is to return an object containing that base iterator (the object acts much along the lines of a boost graph edge/vertex descriptor). At the moment I've cut and pasted transform_iterator.hpp, renamed it transmute_iterator.hpp and edited it to remove one char (the dereferencing *) just so as I can try things out. Oh, I am slow! I was going to ask if such an iterator could be added to boost lib but have just realised that it is trivial for a transmute_iterator to model a transform_iterator. Hmm, so my question now is - is there some reason why the base iterator is dereferenced before being passed to the function? Wouldn't it be better to let the function decide that? thanks, Louis. BTW, you guys write some really great stuff, it's very much appreciated. And C++ Template Metaprogramming is mind blowing (especially chapters 10++). -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 266.11.12 - Release Date: 17/05/2005

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RE: [Boost-users] Re: Question
by Sliwa, Przemyslaw (London) 24 May '05

24 May '05

I have seen it already, thanks. There is nothing about it how to extract the headers and libs. Should I first compile the whole library and then extract it? Or perhaps first extract and then compile. In the second case I do not get any jam file. Can you help? Thanks Pshemek -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of David Abrahams Sent: 23 May 2005 12:10 To: boost-users(a)lists.boost.org Subject: [Boost-users] Re: Question "Sliwa, Przemyslaw (London)" <Przemyslaw_Sliwa(a)ml.com> writes: > Guys, > > I was just wondering if it is possible to install just a part of the > boost library? > The current version is a bit "big" and there are certain libs which I o > not need. See http://www.boost.org/tools/bcp/bcp.html HTH, -- Dave Abrahams Boost Consulting www.boost-consulting.com _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users -------------------------------------------------------- If you are not an intended recipient of this e-mail, please notify the sender, delete it and do not read, act upon, print, disclose, copy, retain or redistribute it. Click here for important additional terms relating to this e-mail. http://www.ml.com/email_terms/ --------------------------------------------------------

2 1

static assertion in date_serialization_demo
by Paolo Coletta 24 May '05

24 May '05

Hi, I've tried to build this simple code using vc 7.1 using namespace boost::gregorian; date d(2004, Apr, 5); std::ofstream ofs("date_demo.txt"); boost::archive::text_oarchive oa(ofs); oa << d; but it fails due to a static assertion. The code is taken from the very first lines of boost_serialization_demo.cpp. It seems to compile with boost 1.32, but seems to fail with current boost. Since this demo is not be included in the jamfile (or I was not able to find it), I built it is using visual studio IDE. The compiler command-line options were: /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /Gm /EHsc /RTC1 /MLd /Fo"Debug/" /Fd"Debug/vc70.pdb" /W3 /nologo /c /Wp64 /ZI /TP I also tried to turn on/off the RTTI, but the result did not change. The error I get is d:\PROJECTS\boost\boost\archive\detail\oserializer.hpp(557) : error C2027: use of undefined type 'boost::STATIC_ASSERTION_FAILURE<x>' Am I missing something? Thanks, Paolo

4 4

Scoped_ptr + deleter
by Sohail Somani 24 May '05

24 May '05

Why doesn't scoped_ptr have an additional template parameter to accept a deleter? Thanks Sohail

3 2

RE: [Boost-users] Scoped_ptr + deleter
by Sohail Somani 23 May '05

23 May '05

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Caleb Epstein > Sent: Monday, May 23, 2005 2:32 PM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] Scoped_ptr + deleter > > > On 5/23/05, Sohail Somani <s.somani(a)fincad.com> wrote: > > Why doesn't scoped_ptr have an additional template > parameter to accept > > a deleter? > > Because that would make it larger than sizeof (T*). I > believe the general consensus on this is to use shared_ptr or > perhaps the upcoming policy_ptr. I also meant to mention that shared_ptr seems a little bit of overkill for wanting to use what is essentially scoped_ptr + a pointer to a deallocation function. Perhaps policy_ptr will be interesting.

1 0

shared pointer and WinCE
by Walter Fettich 23 May '05

23 May '05

Hello I'm having a problem when using shared pointers in Embedded Visual C++ .Net STLPort. When trying to compile I always get the error 'bad_alloc' : is not a member of 'stlp_std' in the file boost/detail/shared_count.hpp Do you know of any solution or what I can do to fix it? The macro BOOST_NO_EXCEPTIONS is defined. Is it a problem in STLPort or Boost? If I remove the namespace identifier then I get an "undeclarer identifier" error. If anyone has a working example of using STLPort and Boost shared pointers with Embedded Visual C++ 4 please post it. Thank You.

3 2

Minor Boost.Optional Documentation Nit
by Stuart Dootson 23 May '05

23 May '05

The Boost.Optional documentation (specifically, near http://www.boost.org/libs/optional/doc/optional.html#bool) says that Boost.Tribool isn't part of Boost - given that tribool debuted in Boost 1.32.0, I guess that's incorrect now... Stuart Dootson

2 1

Question
by Sliwa, Przemyslaw (London) 23 May '05

23 May '05

Guys, I was just wondering if it is possible to install just a part of the boost library? The current version is a bit "big" and there are certain libs which I o not need. Thanks for help, Pshemek -------------------------------------------------------- If you are not an intended recipient of this e-mail, please notify the sender, delete it and do not read, act upon, print, disclose, copy, retain or redistribute it. Click here for important additional terms relating to this e-mail. http://www.ml.com/email_terms/ --------------------------------------------------------

2 1

Re: ~intrusive_ptr bug? - addRef example
by Gottlob Frege 23 May '05

23 May '05

> Date: Sun, 22 May 2005 00:21:21 +0100 > From: Jean-Fran?ois Brouillet <verec(a)mac.com> > Subject: [Boost-users] Re: ~intrusive_ptr bug? > To: boost-users(a)lists.boost.org > Message-ID: <76267242-0F5F-415A-A5ED-D671F4DE420F(a)mac.com> > Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed ... > I fail to see the "generality" in the current design. An example where > it actually makes sense to not "addRef" on ctor but to "remRef" on dtor > would be most welcome. > > > If you're arguing that the design of intrusive_ptr should be changed, > > I don't have such pretensions. I was only suggesting to *rename* the > parameter ``addRef'' into something less confusing because of the > asymmetric behavior. > ... > Many thanks. > -- > JFB > Here's my story: I wrote my own "AutoRefCountPtr" before seeing boost::intrusive_ptr. It is almost exactly the same as intrusive_ptr, including the addRef. Here's why I need the addRef: I'm using a library (DLL) that only exposes abstract classes (in the h file). To get a 'real' object/implementation, I call a function to create an object: CreateFoo(fooparams,..); Internally, this creates a Foo_Implementation, but it is returned to me as a Foo *. Part of Foo's interface is reference counting, via foo->AddRef() and foo->RemoveRef(). So when I'm done with Foo, I call RemoveRef. Note, however, that the Foo * returned from CreateFoo is already addRef'd and ready to go. So I don't need to call AddRef. I could (and did for a while) manage my Foo*'s manually, but after a number of leaks, I gave up and wrote a smart ptr (AutoRefCountPtr) that would RemoveRef automatically when I was done with the pointer. So there's your example. I few other notes: 1. maybe CreateFoo() should have returned a AutoRefCountPtr for me, instead of a 'naked' Foo *. But this is a bit hard, because CreateFoo is inside the DLL, and doesn't really want to pass back any 'real' objects (beside abstract interfaces) because the DLL and the EXE may be built differently, not at the exact same version, etc. 2. maybe the whole system suffered from a fundamental design flaw, and is a bad example. That could be, but nonetheless, it was an essential library, and I didn't really have the option to NOT use it or rewrite it, so an intrusive_ptr like thing was 'real world' helpful, even if only to assist in living with a design flaw. (Not that I think there was a design flaw, but even if there was...) 3. Note that, like intrusive_ptr, my ptr made the initial 'addRef' optional. It needed to be false when you created the object, but if Foo * was passed in as a function argument, that function might wrap it in an intrusive_ptr that DID need to do the initial addref. 4. I called my flag 'addRef'. Is that exactly the same as intrusive_ptr? Note that this still doesn't mean it is a good name - I was the *implementor* and it made sense to me, and was very descriptive for the *implementation*. But maybe it wouldn't make sense for the client/user (which was also me, in my case :-). I suspect boost's 'addRef' was also named from an implementation rather than usage point of view. But I'm still not sure what a better name would be. Maybe "already_pre_addRefd_thanks' or something like that? I do sometimes agree with names that are NOT exactly obvious as long as they are interesting enough that the user is likely to dig a little deeper to find the meaning. But my co-workers often disagree... p.s. I originally made my flag a template parameter, partially because I like this syntax so much: if (AutoRefCountPtr<Foo, false> foo = CreateFoo(blah)) { } instead of if (AutoRefCountPtr foo(CreateFoo(blah), false)) { } which doesn't always compile, because it confuses the compiler, or if (AutoRefCountPtr foo = AutoRefCountPtr(CreateFoo(blah), false)) { } which just isn't as clear as the first way. The problem with making the flag a template param is that AutoRefCountPtr<Foo, false> is not the same type as AutoRefCountPtr<Foo, true> so assignment, etc is a bit tricky. Anyone have a good solution to that? Tony

1 0

a small patch for doc
by Emre Turkay 22 May '05

22 May '05

Attached file is a small patch for libs/algorithms/string/doc/usage.xml file. Emre Turkay 125,126c125,126 < << is_executable("command.com")? "is": "is not" < << "an executable" --- > << (is_executable(str1)? " is": " is not") > << " an executable" 130c130 < char text1[]="hello world!"; --- > char text1[]="hello"; 133c133 < << all( text1, is_lower() )? "is": "is not" --- > << (all( text1, is_lower() )? " is": " is not") 135c135 < << endl; // prints "hello world! is written in the lower case" --- > << endl; // prints "hello is written in the lower case"

3 2

~intrusive_ptr bug?
by Jean-François Brouillet 22 May '05

22 May '05

As observed in another thread, the intrusive_ptr destructor in boost 1.32 does not honor its own status as defined in the constructor with respect to the addRef boolean. This snippet shows the problem: X * x = new X ; { intrusive_ptr<X> p(x, false) ; } // Here, x has been destroyed! Is this a bug, or some requirement (that I couldn't find) that if you ever pass "false" to the constructor, then that intrusive_ptr is assumed to never go out of scope? The fix would be simple: ... bool strong ; intrusive_ptr(T * p, bool add_ref = true): p_(p), strong(add_ref) { if(p_ != 0 && add_ref) intrusive_ptr_add_ref(p_); } ... ~intrusive_ptr() { if(p_ != 0 && strong) intrusive_ptr_release(p_); } though it is less clear whether it would break some assumption I'm not privy to. Also, the above "fix" would increase the stack storage from the typical 4 bytes to probably 8 (due to alignment) just to store an additional bit. Obviously, a less portable implementation could get away with storing the bool as the low order bit of p_, masking it off when required ... Should I go ahead an implement this fix with the knowledge that a future revision of boost will include it, or is there any other consideration that render this fix unlikely to make it into an official release ? BTW: I did check the "unit tests" for intrusive_ptr at: http://cvs.sourceforge.net/viewcvs.py/*checkout*/boost/boost/libs/ smart_ptr/test/intrusive_ptr_test.cpp and this case is clearly not accounted for. -- Jean-François Brouillet verec(a)mac.com

3 10

stringification
by Cory Nelson 22 May '05

22 May '05

Doesn't have to do with boost but this seems like the croud that would know how to do this. I have the code: #ifdef _WIN32_WINNT #ifdef _WIN64 #define BUILDTYPE 3000000 #else #define BUILDTYPE 1000000 #endif #else #define BUILDTYPE 2000000 #endif #define BUILDDATE 50521 #define BUILDNUM (BUILDTYPE+BUILDDATE) and would like to stringify the value of BUILDNUM into say "2050521" in the preprocessor. Is there a way to do this (in vc7.1)? -- Cory Nelson http://www.int64.org

2 1

Installation building errors on win with vc71stlport
by Jacques-Andre Boulay 21 May '05

21 May '05

Hi, I'm trying to install Boost on windows xp with stlport and Visual Studio .Net 2003. When building it with "bjam "-sTOOLS=vc-7_1-stlport" install" I'm obtaining errors that seems like: vc-C++ bin\boost\libs\date_time\build\boost_date_time.dll\vc-7_1-stlport\debug\threading-multi\greg_month.obj greg_month.cpp C:\Documents and Settings\BOUJAC00\Bureau\boost_1_32_0\boost\lexical_cast.hpp(150) : error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'boost::date_time::date_names_put<Config,charT,OutputIterator>::string_type' (or there is no acceptable conversion) with [ Config=boost::gregorian::greg_facet_config, charT=wchar_t, OutputIterator=std::ostreambuf_iterator<wchar_t,std::char_traits<wchar_t>> ] The log of the build is include in log2.txt. Somebody have an idea of what I'm doing wrong? Thanks in advance JA

2 1

[serialization] trouble with vc71, debug build
by Zrubavel Zodikovich 21 May '05

21 May '05

I'm having trouble with debug builds of the boost serialization (1.32) library. The release configuration works fine, but debug build crashes with access violation on binary_iarchive instantiation. call stack is attached. Any suggestions ? msvcp71.dll!std::locale::locale(const std::locale & _Right={...}) Line 235 + 0x7 C++ msvcp71.dll!std::ios_base::getloc() Line 382 + 0xf C++ msvcp71.dll!std::num_put<char,std::ostreambuf_iterator<char,std::char_traits<char> > >::_Iput(std::ostreambuf_iterator<char,std::char_traits<char> > _Dest={...}, std::ios_base & _Iosbase={...}, char _Fill='�', char * _Buf=0x02b3ec18, unsigned int _Count=8) Line 1193 + 0xf C++ msvcp71.dll!std::num_put<char,std::ostreambuf_iterator<char,std::char_traits<char> > >::do_put(std::ostreambuf_iterator<char,std::char_traits<char> > _Dest={...}, std::ios_base & _Iosbase={...}, char _Fill='�', const void * _Val=0x00000005) Line 1032 C++ msvcp71d.dll!std::codecvt_base::always_noconv() Line 566 C++ msvcp71d.dll!std::basic_filebuf<char,std::char_traits<char> >::_Initcvt(std::codecvt<char,char,int> * _Newpcvt=0x027538a0) Line 483 + 0x8 C++ msvcp71d.dll!std::basic_filebuf<char,std::char_traits<char> >::imbue(const std::locale & _Loc={...}) Line 413 C++ msvcp71.dll!std::basic_streambuf<unsigned short,std::char_traits<unsigned short> >::pubimbue(const std::locale & _Newlocale={...}) Line 79 C++ msvcp71.dll!std::basic_ios<unsigned short,std::char_traits<unsigned short> >::imbue(const std::locale & _Loc={...}) Line 96 + 0xc C++ ImageTransformTest.dll!boost::archive::basic_binary_iprimitive<boost::archive::binary_iarchive,std::basic_istream<char,std::char_traits<char> > >::basic_binary_iprimitive<boost::archive::binary_iarchive,std::basic_istream<char,std::char_traits<char> > >(std::basic_istream<char,std::char_traits<char> > & is_={...}, bool no_codecvt=false) Line 139 + 0x25 C++ ImageTransformTest.dll!boost::archive::binary_iarchive_impl<boost::archive::binary_iarchive>::binary_iarchive_impl<boost::archive::binary_iarchive>(std::basic_istream<char,std::char_traits<char> > & is={...}, unsigned int flags=0) Line 56 + 0x35 C++ ImageTransformTest.dll!boost::archive::binary_iarchive::binary_iarchive(std::basic_istream<char,std::char_traits<char> > & is={...}, unsigned int flags=0) Line 78 + 0x17 C++

2 1

Re: [Boost-users] Question about template optimization
by Gottlob Frege 21 May '05

21 May '05

> Date: Wed, 18 May 2005 17:32:49 -0700 > From: "Elisha Berns" <e.berns(a)computer.org> > Subject: [Boost-users] Question about template optimization > To: "Boost" <boost-users(a)lists.boost.org> > Message-ID: <000001c55c0a$4966cf30$651aa8c0@INSPIRATION> > Content-Type: text/plain; charset="us-ascii" > > I need help with this one, even though it's a pure C++ question, it's > about template optimization: > > If a template class has methods that DO NOT depend on or use the type > parameter(s) of the template will the code for the methods nevertheless > get instantiated separately for each unique instance of the template > class? For example, if there are 20 unique types used to declare 20 > instances of template class X, do those methods get implemented 20 > different times, needlessly, and cause a big code bloat? > what about 'non-dependent' methods with local statics: template <typename T> class C { int fooCount() { static int foo = 0; return ++foo; } }; C<int> a; C<long> b; int fooA = a.fooCount(); int fooB = b.fooCount(); what is the value of fooB? If there was only 1 implementation of fooCount() I would expect fooB == 2. However, I think you will find fooB == 1. I suppose a compiler could still make the code common, but with separate static foo's, but then in general, there is nothing stopping a compiler from looking at 2 unrelated functions and saying, 'hey, lots of the code here looks the same; I should just refactor some of it out and remove some code bloat'. Not sure much of that ever happens. Reality is that once upon a time there were compiler switches for size vs speed, but speed won. > Even if most compilers are smart about this kind of thing, is it still > better practice to separate from the template class (or method) all of > the code that does not use the template type parameters? > Short answer: I suspect code bloat happens, and you should keep non-dependent code out of your templates if you care about it enough. > Thanks, > > Elisha Berns > e.berns(a)computer.org > > Tony

3 2

Gcc hangs when compiling serialization/xml_grammar.cpp on mac
by Bo Peng 20 May '05

20 May '05

Dear list, This problem has been discussed: seralization library can not be built under mac because gcc will hang when compiling xml_grammar.cpp (See the attached email from this list). Has anyone investigated this issue? Thanks. Bo -------------------------------------------------------------------------------------------------------------- On 4/18/05, Tom Denniston <tom.denniston at gmail.com> wrote: > That works, all the targets seem to compile except one (see below). > It seems to just hang. Is this the one you were having trouble with. > what surprises me is that I have 1 GB of ram and still have the > problem. > > The ouput I am seeing is below: > > Tom-Dennistons-Computer:/development/libraries/boost_1_32_0 > tomdenniston$ /development/bjam-3.1.10-1/bjam -sTOOLS=darwin > -sPYTHON_VERSION=2.3 > ...found 8239 targets... > ...updating 261 targets... > darwin-C++-action > bin/boost/libs/serialization/build/libboost_serialization.a/darwin/release/xml_grammar.o That's the one. Perhaps it's not a memory problem but rather a compiler bug? I haven't ever bothered to dig into it because I am not using the serialization library. As I said before, I usually restrict the build to just the libraries that I need. It saves time and space. -Patrick

1 0

Intefaces (BIL) IDL formating
by Tim Michals 20 May '05

20 May '05

What I'm setting up is a formatting API for logging and want to pass parameters like printf is doing. "Jonathan Turkanis" <technews(a)kangaroologic.com> wrote in message news:d6fsoa$5c4$1@sea.gmane.org... > Tim Michals wrote: > > I'm trying to figure out how would you format the IDL function for a > > general function like printf? > > > > For example > > the function is printf( const char *fmt, ...) > > > > How you format the IDL function? > > BOOST_IDL_FN1(formatMsg, const char *fmt) > > Function with variable numbers of arguments, and non-member functions, aren't > (yet) supported. In fact, supporting functions with variable number of arguments > never occurred to me. Also, when non-member functions are supported, they will > have to have at least one parameter type related to the interface being defined. > > What's your intended use? > > Best, > Jonathan

1 0

[BGL] combining kdtree-style operations
by martin f krafft 20 May '05

20 May '05

I am looking at a complex project I am about to implement with BGL. Among regular graph operations, we need each vertex/edge to be located in Cartesian space (a Coordinate property will do) and for any point P in this Cartesian space (which may coincide with a vertex or edge) determine the set of geographically close vertices/edges (within the sphere of radius r, centred at P). Thus, the result set is essentially completely independent of the graph's structure, only dependent on the Coordinate property of the graph elements. The classic algorithm for this type of problem is the KD-Tree, a structure optimised for spatial lookups in K-dimensional space. It uses the same technique as a binary search, but at each level, the next dimension is compared... until K, at which point the iteration starts again from 0. Bentley, J. L., Multidimensional binary search trees used for associative searching, Communications of the ACM, v.18 n.9, p.509-517, Sept. 1975 A demo for 2 dimensional search: http://www.rolemaker.dk/nonRoleMaker/uni/algogem/kdtree.htm I have written a nice, flexible STL-container-style KDTree implementation: http://freshmeat.net/projects/libkdtree This uses its own tree implementation along with bidirectional iterators. Since it stores edges and vertices in the same data structure, it does not really make for a good base container for the BGL. It would be possible to use separate trees for edges and vertices, but another problem makes that really difficult: changes to the Cartesian coordinates basically require the object to be removed and reinserted into the tree, and erasure does not work reliably currently (I have not found a viable update strategy). Now I am faced with the task of combining that with the BGL. Thus, I am weighing options: - does anyone work with KD Trees and the BGL who'd be willing to share experiences with me? In particular, I wonder whether it is possible * to use the same data structures for both, such that I do not have to store multiple pointers for my objects, one in the graph and one in the KD tree? * to implement KD trees with BGL? - would this library be a candidate for Boost and/or the BGL? I realise that it's way too STL-centric right now (I somehow got a kick out of using the same variable naming scheme as the SGI STL implementation, which was made by people with obvious psychiatric needs (</humour>). Basically, between its current version and a final version ("1.0"), the following needs to be done: * clean up the source code to make it less cryptic (1 day) * figure out how to implement erase-and-optimise efficiently (1 week) * figure out a way to make the coordinates mutable so that the tree can accomodate moving objects (although it's probably not the best container for e.g. particle systems). * push decisions down into policies (it already uses comparator and allocator policies). So this email does two things: If you are familiar with KD trees and the BGL, please give me some insight into your approach. If you are interested in the KD tree implementation and think that it would be a good candidate for boost, consider helping out to attack the TODO list, and if only with conceptual discussion. Thanks for your time and patience. -- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck invalid/expired pgp subkeys? use subkeys.pgp.net as keyserver! spamtraps: madduck.bogus(a)madduck.net "half a bee, philosophically, must ipso facto half not be." -- monty python

3 6

Confusion with demo.cpp from Serialization doc
by Peter Broadwell 20 May '05

20 May '05

When I seemingly successfully compile: http://boost.org/libs/serialization/example/demo.cpp a sample of several aspects of the Boost Serialization library, I get something close to what I expect, but it is missing the names of the drivers in the restored schedule (output below). In debugging the code it seems the file_version argument to the serialize call is always 0, despite the macro BOOST_CLASS_VERSION to set it to 2 being evaluated at compile time. I am running: - gentoo linux, 2005.0, 2.6.11-gentoo-r6 - i686-pc-linux-gnu-3.4.3-20050110 - dev-libs/boost-1.32.0 Any clues where to look for the culprit, or is this the expected behavior? ;;peter > original schedule > 6:24 bob > 0x0x806b0b0 34º135'52.56" 134º22'78.3" 24th Street and 10th Avenue > 0x0x806b120 35º137'23.456" 133º35'54.12" State street and Cathedral Vista Lane > 0x0x806b168 35º136'15.456" 133º32'15.3" White House > 9:57 bob > 0x0x806b0b0 34º135'52.56" 134º22'78.3" 24th Street and 10th Avenue > 0x0x806b120 35º137'23.456" 133º35'54.12" State street and Cathedral Vista Lane > 0x0x806b168 35º136'15.456" 133º32'15.3" White House > 11:2 alice > 0x0x806b0b0 34º135'52.56" 134º22'78.3" 24th Street and 10th Avenue > 0x0x806b120 35º137'23.456" 133º35'54.12" State street and Cathedral Vista Lane > 0x0x806b168 35º136'15.456" 133º32'15.3" White House > 7:17 ted > 0x0x806b1b8 35º134'48.789" 133º32'16.23" Lincoln Memorial > 0x0x806b168 35º136'15.456" 133º32'15.3" White House > 0x0x806b120 35º137'23.456" 133º35'54.12" State street and Cathedral Vista Lane > 9:38 ted > 0x0x806b1b8 35º134'48.789" 133º32'16.23" Lincoln Memorial > 0x0x806b168 35º136'15.456" 133º32'15.3" White House > 0x0x806b120 35º137'23.456" 133º35'54.12" State street and Cathedral Vista Lane > 11:47 alice > 0x0x806b1b8 35º134'48.789" 133º32'16.23" Lincoln Memorial > 0x0x806b168 35º136'15.456" 133º32'15.3" White House > 0x0x806b120 35º137'23.456" 133º35'54.12" State street and Cathedral Vista Lane > restored schedule > 6:24 > 0x0x806d7b0 34º135'52.56" 134º22'78.3" 24th Street and 10th Avenue > 0x0x806dce8 35º137'23.456" 133º35'54.12" State street and Cathedral Vista Lane > 0x0x806dd58 35º136'15.456" 133º32'15.3" White House > 9:57 > 0x0x806d7b0 34º135'52.56" 134º22'78.3" 24th Street and 10th Avenue > 0x0x806dce8 35º137'23.456" 133º35'54.12" State street and Cathedral Vista Lane > 0x0x806dd58 35º136'15.456" 133º32'15.3" White House > 11:2 > 0x0x806d7b0 34º135'52.56" 134º22'78.3" 24th Street and 10th Avenue > 0x0x806dce8 35º137'23.456" 133º35'54.12" State street and Cathedral Vista Lane > 0x0x806dd58 35º136'15.456" 133º32'15.3" White House > 7:17 > 0x0x806dcc0 35º134'48.789" 133º32'16.23" Lincoln Memorial > 0x0x806dd58 35º136'15.456" 133º32'15.3" White House > 0x0x806dce8 35º137'23.456" 133º35'54.12" State street and Cathedral Vista Lane > 9:38 > 0x0x806dcc0 35º134'48.789" 133º32'16.23" Lincoln Memorial > 0x0x806dd58 35º136'15.456" 133º32'15.3" White House > 0x0x806dce8 35º137'23.456" 133º35'54.12" State street and Cathedral Vista Lane > 11:47 > 0x0x806dcc0 35º134'48.789" 133º32'16.23" Lincoln Memorial > 0x0x806dd58 35º136'15.456" 133º32'15.3" White House > 0x0x806dce8 35º137'23.456" 133º35'54.12" State street and Cathedral Vista Lane

1 0

Re: pimpl and Qt
by gruenedd＠idmt.fraunhofer.de 19 May '05

19 May '05

> 1. Global namespace pollution. That can be easily fixed, by making > FooPrivate innter class of Foo. I don't think that a struct supplied with and named like the class followed by Private is a pollution, and it matches the naming conventions in Qt3. You can make it an inner class, but what i tried to point out is that you have to make the type public, because the generated code from moc needs access to that structure in cases. I gave that hint, that beginners avoid this issue from the beginning. > 2. High danger of unexpected behaviour if implementation of assignment > and copy contrsuctor is omitted or incorrect. If you forget to > implement copy operator and then .... I leaved that out. Of course you can use copy constructors and stuff or you favorite smartpointer, or both or whatever one prefer... --David

1 0

How to compile boost for MinGW/MSYS ?
by Mark Junker 19 May '05

19 May '05

Hi, how can I compile boost for MinGW/MSYS? Is there any howto? How can I compile jam for MinGW/MSYS? Regards, Mark

2 1

[BGL] complexity of random_vertex/random_edge
by martin f krafft 19 May '05

19 May '05

http://www.boost.org/libs/graph/doc/random.html claims that random_vertex and random_edge both have a runtime complexity linear in the number of vertices and edges, respectively. This seems weird. Given a random access iterator and the number of elements, retrieving a random member should be doable in constant time. Is the complexity guarantee here based on the worst case of the lists only being directionally accessible? If yes, does using container class implementing the RandomAccessIterator concept automatically select constant-time versions of these random retrievers? Thanks for your comments. -- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck invalid/expired pgp subkeys? use subkeys.pgp.net as keyserver! spamtraps: madduck.bogus(a)madduck.net this product is under strict quality contril with perfect packing and quality when leving the factory.please keep away from damp.high temperature or sun expose.If found any detectives when purchasing. please return the productby airmail to our administration section and inform the time, place.and store of this purchase for our improvement.We shall give you a satisfactory reply.Thanks for your patronage and welcome your comments. -- http://www.engrish.com

2 2

RE: [Boost-users] Using Boost with Tandem
by Kick Damien-DKICK1 19 May '05

19 May '05

John Maddock [john(a)johnmaddock.co.uk] wrote: > Never heard of Tandem until you mentioned it, [...] Well, I won't say you're lucky, but... > [...] so if you're confused, don't ask us ! :-) Yeah, I was afraid of that <wink>. > > [...] Either way, unless someone else has already done this, then > > I'll probably have to learn how to define a new toolset for Boost? > Probably not: remember that most of Boost can be used as "headers > only", so depending on which libraries you want to use, you may not > need to build anything. Well, except for invoking the work arounds for broken compilers. Whatever the Tandem cross compiler for G06.15 may or may not be, it definitely is not using the EDG front end. I have kind of been assuming that these details were addresses by the toolset definition. Looks like I should probably start with <http://www.boost.org/libs/config/config.htm> and then root around in other toolsets toolset definitions for example jamfiles?

2 1

regex feature request:)
by Serge Skorokhodov 19 May '05

19 May '05

Hi, boost::regex documentation runs "... embarrassments / limitations will be removed in due course, mainly dependent upon user demand ...". I just wote for zero-length lookbehind "(?<=pattern)" implementation. TIA -- Serge

2 1

pimpl and Qt
by Filipe Sousa 19 May '05

19 May '05

Hi! I'm having trouble implementing Pimpl idiom with Qt. Look at the following code: class IndispFilterWidget : public QHBox { Q_OBJECT public: IndispFilterWidget(QWidget* parent = 0); private: struct Private; boost::scoped_ptr<Private> d; }; struct IndispFilterWidget::Private { QIntDict<BrushButton> buttons; }; IndispFilterWidget::IndispFilterWidget(QWidget* parent) : QHBox(parent) , d(new Private) { } and see the error: /usr/include/boost/checked_delete.hpp: In function 'void boost::checked_delete(T*) [with T = exames::calendario::IndispFilterWidget::Private]': /usr/include/boost/scoped_ptr.hpp:77: instantiated from 'boost::scoped_ptr<T>::~scoped_ptr() [with T = exames::calendario::IndispFilterWidget::Private]' /home/fsousa/projects/GAL/BUILD/modules/exames/calendario/../../../../modules/exames/calendario/IndispFilterWidget.h:31: instantiated from here /usr/include/boost/checked_delete.hpp:32: error: invalid application of 'sizeof' to incomplete type 'exames::calendario::IndispFilterWidget::Private' /usr/include/boost/checked_delete.hpp:32: error: creating array with size zero ('-0x000000001') /usr/include/boost/checked_delete.hpp:33: error: invalid application of 'sizeof' to incomplete type 'exames::calendario::IndispFilterWidget::Private' /usr/include/boost/checked_delete.hpp:33: error: creating array with size zero ('-0x000000001') /usr/include/boost/checked_delete.hpp:34: warning: possible problem detected in invocation of delete operator: /usr/include/boost/checked_delete.hpp:29: warning: 'x' has incomplete type /home/fsousa/projects/GAL/BUILD/modules/exames/calendario/../../../../modules/exames/calendario/IndispFilterWidget.h:45: warning: forward declaration of 'struct exames::calendario::IndispFilterWidget::Private' If I remove Q_OBJECT macro or add a destructor the code compiles fine. I don't have a problem with shared_ptr, only with scoped_ptr. -- Filipe Sousa

3 5

RE: [Boost-users] Using Boost with Tandem
by Kick Damien-DKICK1 19 May '05

19 May '05

John Maddock [john(a)johnmaddock.co.uk] wrote: > Damien Kick wrote: > > I was able to find one e-mail in the archives asking about using > > Boost on Tandem but I was unable to find a reply. Not a good sign > > <smile>. I currently find myself using the Tandem Development > > Suite cross compiler for Windows version G06.15 with Cygwin and I > > hoping I can use Boost, too. Any help? > What's the compiler? All I could find on the web was a reference to > Borland C++, in which case, yes it should be more or less supported > (Borland's compiler is rather broken, so a few advanced bits of > Boost won't work, but most does). Hmmm... I had been thinking that the TDS was its own product (from HP documents, as it owns Tandem at the moment) The Tandem Development Suite (TDS) offers the option of selecting the native C/C++ PC cross compiler (the Tandem_CCompile product). but looking a bit closer The TDS provides an easty-to-use graphical user interface that uses the Borland IDE. [...] Release 2 of the TDS supports Borland C++ version 5.02. The Compaq extensions to the Borland development environment provide a choice of compilers, So now I'm a bit confused... What does it mean, "supports Borland C++"? But, even assuming that Tandem_CCompile is using Borland as a front-end and generating object code of Tandem Guardian/OSS, I still need to deal with the Cygwin aspect, AFAICT; i.e. there is no Borland on Cygwin toolset I can select. Either way, unless someone else has already done this, then I'll probably have to learn how to define a new toolset for Boost?

2 1

Re: pimpl and Qt
by gruenedd＠idmt.fraunhofer.de 19 May '05

19 May '05

> private: > struct Private; > boost::scoped_ptr<Private> d; > }; When working with Qt, i suggest to write the Pimpl idiom like this, since the generated code from moc needs access to your FooPrivate, in cases. struct FooPrivate; class Foo { private: FooPrivate* pimpl_; }; --David

2 1

boost.graph determining if one graph is a subgraph of another
by Alex Helder 19 May '05

19 May '05

Hello: If I have two graphs, G = ( E, V) G' = ( E', V' ) what would be the most efficient way, using BGL, to determine whether G' is a subgraph of G?. I'm not interested in 'isomorphic' subgraphs. Of course, if G' is a subset of G, then E' is a subset of E and V' is a subset of V. I guess I could iterate over all the edge and vertex descriptors for both graphs ... but I was wondering if there was another way. I'm not experienced with graph theory (if that isn't obvious by now!) Thanks -Alex

2 1

[BGL] Segmentation fault in add_vertex
by Martin Magnusson 19 May '05

19 May '05

I am sometimes getting segmentation faults (using gcc 3.3.4 under Cygwin) in calls to add_vertex( g ), where g is of the following type: boost::adjacency_list < boost::setS, boost::vecS, boost::undirectedS, Vertex_Properties, Edge_Length > This happens when I try to merge two graphs with repeated calls to add_vertex (not updating edges or anything, just adding new vertices), and usually when the returned index from add_vertex is around 40000-50000, but it depends on the data. Creating a single graph with more than 50000 vertices in one go is not a problem. Does anyone have an idea of what is going on in add_vertex, and what could be the problem here? I suspect it has something to do with the automatic resizing of the internal vector used to store the vertices. Is there a way to reserve memory in advance for this?

2 1

How to get BGL compiled with VC2005?
by sr kumar 19 May '05

19 May '05

Hi, I am attempting to compile Boost with VC2005. All goes well, with the exception of the Boost Graph library. The compiler errors at the bottom of the email. flex and bison from http://gnuwin32.sourceforge.net/ The problems seem to be the unistd.h which is missing on Win32. I played around with setting YY_NO_UNISTD_H in the Jamfile and the header files themselves. However, I'm not an expert (and have obviously been unsuccessful!). Would appreciate any help in figuring how to work around the problem. thanks, -sr _______________________________________ bison.bison ..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphviz_graph_parser.cpp ..\..\..\bin.v 2\libs\graph\build\msvc-8.0\debug\graphviz_graph_parser.hpp ..\..\..\libs\graph\src\graphviz_parser.yy: conflicts: 1 shift/reduce bison.bison ..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphviz_digraph_parser.cpp ..\..\..\bin .v2\libs\graph\build\msvc-8.0\debug\graphviz_digraph_parser.hpp ..\..\..\libs\graph\src\graphviz_parser.yy: conflicts: 1 shift/reduce msvc.compile.c++ ..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphviz_graph_lex.obj graphviz_graph_lex.cpp ..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphviz_graph_lex.cpp(43) : fatal error C1083: Cann ot open include file: 'unistd.h': No such file or directory call "C:\Program Files\Microsoft\Visual Studio 8\VC\bin\vcvars32.bat" > nul cl /Zm800 -nologo -TP -DBOOST_ALL_NO_LIB=1 -DGRAPHVIZ_DIRECTED=0 -DYY_NO_UNISTD_H /Z7 /Od /Ob0 /E Hsc /GR /MDd -I"..\..\..\libs\graph\src" -I"C:\bugsnoop\trunk\src\checkmate\boost" -I"..\..\..\bin .v2\libs\graph\build\msvc-8.0\debug" -c -Fo"..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphvi z_graph_lex.obj" "..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphviz_graph_lex.cpp" ...failed msvc.compile.c++ ..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphviz_graph_lex.obj... lex.lex ..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphviz_digraph_lex.cpp msvc.compile.c++ ..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphviz_digraph_lex.obj graphviz_digraph_lex.cpp ..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphviz_digraph_lex.cpp(43) : fatal error C1083: Ca nnot open include file: 'unistd.h': No such file or directory call "C:\Program Files\Microsoft\Visual Studio 8\VC\bin\vcvars32.bat" > nul cl /Zm800 -nologo -TP -DBOOST_ALL_NO_LIB=1 -DGRAPHVIZ_DIRECTED=1 -DYY_NO_UNISTD_H /Z7 /Od /Ob0 /E Hsc /GR /MDd -I"..\..\..\libs\graph\src" -I"C:\bugsnoop\trunk\src\checkmate\boost" -I"..\..\..\bin .v2\libs\graph\build\msvc-8.0\debug" -c -Fo"..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphvi z_digraph_lex.obj" "..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphviz_digraph_lex.cpp" ...failed msvc.compile.c++ ..\..\..\bin.v2\libs\graph\build\msvc-8.0\debug\graphviz_digraph_lex.obj. ___________________________

2 1

BGL question: edge order
by Andreas Fabri 19 May '05

19 May '05

Hello, in order to store planar graphs, I am wondering if the graph classes of the BGL allow to enforce an order of the edges which are adjacent to a vertex. Also is it possible to add an edge between two edges. andreas

2 1

BGL: copy graph & edge predicate question
by Sebastian Weber 19 May '05

19 May '05

Hello Everybody! I am trying to extract a part of a graph. Speaking in terms of the BGL, I do a copy from a filtered graph object into a new graph. To do so, I defined a VerticePredicate for the filtered graph. As a result not all vertices in the graph are present in the filtered version. This implies that some edges do disappear in the filtered version fo the graph. In order to copy from this filtered graph into a new, fresh graph via copy, do I have to use the following EdgePredicate? // edge predicate which only lets edges through which are part // of the given VerticePredicate template <class Graph, class VerticePredicate> struct edge_filter { typedef boost::graph_traits<Graph> Traits; typedef typename Traits::edge_descriptor Edge; // needs to be default-constructible ! edge_filter() { } edge_filter(Graph& g, VerticePredicate& vFilter) : m_g(&g), m_vFilter(&vFilter) {} bool operator()(const Edge& e) const { return (*m_vFilter)(boost::target(e,*m_g)) && (*m_vFilter)(boost::source(e,*m_g)); } private: Graph* m_g; VerticePredicate* m_vFilter; }; Or is this not necessary and implicitly done by the filtered graph interface? Another thing concernig the copy-function: Is there a way to NOT copy the vertice indices, but rather have the vertices renumbered from 1 to size of filtered graph? I guess I have to cope with the vertice_copier-function stuff, but I don't see how to do it. And another matter: The copy_component function does not seem to be documented. I found it by chance in the sources of copy.hpp. Thanks a lot! Sebastian Weber

2 1

Question about template optimization
by Elisha Berns 19 May '05

19 May '05

I need help with this one, even though it's a pure C++ question, it's about template optimization: If a template class has methods that DO NOT depend on or use the type parameter(s) of the template will the code for the methods nevertheless get instantiated separately for each unique instance of the template class? For example, if there are 20 unique types used to declare 20 instances of template class X, do those methods get implemented 20 different times, needlessly, and cause a big code bloat? Even if most compilers are smart about this kind of thing, is it still better practice to separate from the template class (or method) all of the code that does not use the template type parameters? Thanks, Elisha Berns e.berns(a)computer.org

1 0

Re: ~intrusive_ptr bug?
by Jean-François Brouillet 18 May '05

18 May '05

>> intrusive_ptr(T * p, bool add_ref = true); >> Effects: if(p != 0 && add_ref) intrusive_ptr_add_ref(p);. >> >> Postconditions: get() == p. > > [...] > > Right, so you can't call it a bug if the implementation does > exactly as stated. ;-) Consider: X * x = new X ; { intrusive_ptr<X> px(x) ; } Here, x is destroyed, and rightly so. Now (same example as yesterday): X * x = new X ; { intrusive_ptr<X, false> px(x) ; } Here, x is destroyed *too*, even though the additional "false" was supposed to mean: "please, don't mess-up with refCounts at all, *I* have everything under control. Nope. If preserving the current intrusive_ptr semantics is paramount (as I kind of sense it is now), some confusion could be avoided by renaming "addRef" to something less ambiguous or suggestive. The question is not _how_ it does what it does (it does it by adding 1 to the refCount, or not, hence that dubious name) but _what_ it does when that argument is set to false. If it is difficult to find a name to describe _what_ it does in such a case (which might point to a poorly understood use-case) then the next best thing is probably a catch-all word such as "standard", which, by negation (=false) means a clear warning: "What you're about to do when setting ``standard'' to false is, by definition non standard, and you *must* understand so and so to avoid being caught with your pants down" > I'm pretty sure that a shared_ptr-based port can closely > approximate the original, "approximate"! That's the key. I don't want to "approximate". Either I find a way to *completely* hide the smart pointer modulo: - the initial "new X" - "on the fly" packaging of ``this'' when required __from within__ (ie when passing ``this'' to some other unrelated method of some other class that requires an _envelope_ as argument and not a _body_, since my whole API, once translated from Java, will only expose _envelopes_) or I will go the painful Boehm's road and use conservative GC. > but a custom smart pointer would probably be a better choice for > idiomatic Java code. I wish you are right! I'll give myself all the evenings and week-ends until the end of May. If I fail to come up with something that is acceptable, I'll go conservative, because "Real artists ship!" :-) > As for intrusive_ptr, its main strength is that it has the size > of a pointer. HoHum ...scoped_ptr shares this "exclusive" strength ... > Adding a boolean would likely meet serious opposition. Never mind the opposition. Is that the right thing to do or not? Since I don't understand your use cases, I just can't comment. > Your requirements are very interesting, however, and point to a > shared/intrusive hybrid along the lines of: > > template<class T> class intrusive_ptr_2 > { > T * px_; > intrusive_ptr<Object> pn_; > > // insert smart pointer boilerplate here ;-) > }; I'm not sure I understand. pn_ is supposed to perform the refCounting part, and px_ is supposed to be the actual _body_ ? > It's an intrusive pointer that's close to shared_ptr in expressive > power; you can use it to point to a subobject, for example. > > Extending intrusive_ptr to accommodate the above along the lines of > > template<class T, class U = void> class intrusive_ptr > { > T * px_; > U * pn_; // not present when U == void > }; > > could be feasible. I'm lost. I don't see how this relates to the problem of providing an indirection ("pointer") construct such that, once you've have written xxxx_ptr<X> p(new X) ; you're done, once and for all, never asking _user_ code to deal with the intricacies of your xxxx_ptr *implementation*. When you come to think of it, a garbage collector is meant to provide _automatic_ garbage collection, not semi-automatic, or half-manual. Compounding the problem of memory management with additional idiosyncratic problems is not going to free that one remaining brain cell out of a total of 7, that holds the whole universe under your current consciousness level. A bad guarantee is worse than no guarantee at all. IMHO :) Many thanks -- JFB

2 1

RE: [Boost-users] Re: fatal error C1204 on MS .Net with boost serialize
by Olivier Vanden Bos 18 May '05

18 May '05

/Zm do not change anything in this case. I use the 1.32 version, with the .Net project , but the parameters for the boost project are not concerned, as the compiler block when compiling my files in my project. Actually I am trying to have feedback from Microsoft... http://www.kbalertz.com/kb_883655.aspx - VDB - "LNK1210: exceeded internal ILK size limit" -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Robert Ramey Sent: 18 mai 2005 15:53 To: boost-users(a)lists.boost.org Subject: [Boost-users] Re: fatal error C1204 on MS .Net with boost serialize Look at the command line switches used by bjam for this platform. Also, the 1.32 and 1.33 packages include premade VC 7 projects with command line switches set. Look at them. Definitely use /Zm800 among others. Robert Ramey Olivier Vanden Bos wrote: > It's just my signature :) (bad idea, I can see that) > The real error is > > Fatal Error C1204 : compiler limit : internal structure overflow > The compiler has run out of memory. Your program needs to be > simplified, perhaps by splitting a large source code file into > smaller files. > > And i found a mail about that "[Boost-users] serialization library - > Serializing classes from a DLL", that didnt not solve my case > (identical) but explain it :P > It is just that the work around (splitting the file) becomes very hard > to apply , actually i need to put one BOOST_DCL for each file !!! > > > - VDB - > > > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Arne Vogel > Sent: 17 mai 2005 03:35 > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] fatal error C1204 on MS .Net with boost > serialize > > Olivier Vanden Bos wrote: > >> I ve got a lot of this, i m forced to split all declarations of >> classes in separate .cpp file. >> >> In fact, Boost::serialize become unusable... >> >> Does somebody have a solution ? >> >> **- VDB - ** / / >> / "//LNK2019: unresolved external symbol//"/ >> * * >> > > Could you be more specific about _what_ symbols are unresolved? > > - Arne Vogel > > > _______________________________________________ > 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

1 0

RE: [Boost-users] Re: fatal error C1204 on MS .Net with boost serialize
by Olivier Vanden Bos 18 May '05

18 May '05

I just tried. Nothing changed. - VDB - "LNK1210: exceeded internal ILK size limit" -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Jeff Flinn Sent: 18 mai 2005 15:14 To: boost-users(a)lists.boost.org Subject: [Boost-users] Re: fatal error C1204 on MS .Net with boost serialize "Olivier Vanden Bos" <olivier.vanden-bos(a)ubisoft.com> wrote in message news:930168C299A0C44D905F4B11995AD744013FD607@UBIMAIL2.ubisoft.org... > It's just my signature :) (bad idea, I can see that) > The real error is > > Fatal Error C1204 : compiler limit : internal structure overflow > The compiler has run out of memory. Your program needs to be simplified, > perhaps by splitting a large source code file into smaller files. Have you tried using: #define BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP in your translation unit previous to any serialization header inclusions? Jeff Flinn _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

1 0

RE: [Boost-users] fatal error C1204 on MS .Net with boost serialize
by Olivier Vanden Bos 18 May '05

18 May '05

It's just my signature :) (bad idea, I can see that) The real error is Fatal Error C1204 : compiler limit : internal structure overflow The compiler has run out of memory. Your program needs to be simplified, perhaps by splitting a large source code file into smaller files. And i found a mail about that "[Boost-users] serialization library - Serializing classes from a DLL", that didnt not solve my case (identical) but explain it :P It is just that the work around (splitting the file) becomes very hard to apply , actually i need to put one BOOST_DCL for each file !!! - VDB - -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Arne Vogel Sent: 17 mai 2005 03:35 To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] fatal error C1204 on MS .Net with boost serialize Olivier Vanden Bos wrote: > I ve got a lot of this, i m forced to split all declarations of > classes in separate .cpp file. > > In fact, Boost::serialize become unusable... > > Does somebody have a solution ? > > **- VDB - ** / / > / "//LNK2019: unresolved external symbol//"/ > * * > Could you be more specific about _what_ symbols are unresolved? - Arne Vogel _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

4 3

Intefaces (BIL) IDL formating
by Tim Michals 18 May '05

18 May '05

I'm trying to figure out how would you format the IDL function for a general function like printf? For example the function is printf( const char *fmt, ...) How you format the IDL function? BOOST_IDL_FN1(formatMsg, const char *fmt)

2 1

Using Boost with Tandem
by Kick Damien-DKICK1 18 May '05

18 May '05

I was able to find one e-mail in the archives asking about using Boost on Tandem but I was unable to find a reply. Not a good sign <smile>. I currently find myself using the Tandem Development Suite cross compiler for Windows version G06.15 with Cygwin and I hoping I can use Boost, too. Any help?

2 1

building boost.test with mac os X
by Simmons, Aaron 18 May '05

18 May '05

I am unable to build boost.test 1.32.0 on MacOS X 10.3/10.4. The build fails due to some undefined symbols. On MacOS 10.3, these symbols are: cpp_main(int, char**) test_main(int, char**) init_unit_test_suite(int, char**) On 10.4, these symbols are __Z8cpp_mainiPPc __Z9test_mainiPPc __Z20init_unit_test_suiteiPPc Does anyone know why this is happening and how to fix it? Thanks. Below is the output of the first of these link errors on 10.3: darwin-Link-DyLib-action builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwi n/debug/runtime-link-static/shared-linkable-true/libboost_prg_exec_monit or-sd-1_32.dylib ld: Undefined symbols: cpp_main(int, char**) DYLD_LIBRARY_PATH=builddir/bin/boost/libs/test/build/libboost_prg_exec_m onitor.dylib/darwin/debug/runtime-link-static/shared-linkable-true export DYLD_LIBRARY_PATH ld -dynamic -m -r -d -o "builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darw in/debug/runtime-link-static/shared-linkable-true/libboost_prg_exec_moni tor-sd-1_32.lo" "builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darw in/debug/runtime-link-static/shared-linkable-true/execution_monitor.o" "builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darw in/debug/runtime-link-static/shared-linkable-true/cpp_main.o" \ && \ c++ -static-libgcc -g -Wl,-dynamic -nostartfiles -Wl,-dylib -Wl,-ldylib1.o -o "builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darw in/debug/runtime-link-static/shared-linkable-true/libboost_prg_exec_moni tor-sd-1_32.dylib" "builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darw in/debug/runtime-link-static/shared-linkable-true/libboost_prg_exec_moni tor-sd-1_32.lo" \ \ \ && \ rm -f "builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darw in/debug/runtime-link-static/shared-linkable-true/libboost_prg_exec_moni tor-sd-1_32.lo" ...failed darwin-Link-DyLib-action builddir/bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwi n/debug/runtime-link-static/shared-linkable-true/libboost_prg_exec_monit or-sd-1_32.dylib... ...skipped <@boost!lib>libboost_prg_exec_monitor-sd-1_32.dylib for lack of <@boost!libs!test!build/libboost_prg_exec_monitor.dylib/darwin/debug/run time-link-static/shared-linkable-true>libboost_prg_exec_monitor-sd-1_32. dylib...

2 1

Boost question about static method of a class
by kauai 18 May '05

18 May '05

Hi all, Just wondering if I can do this with Boost: I have a number of classes that all have the same static method with the same arguments. I want to register these classes somewhere/somehow so that later on I can do something like: aClassName::StaticMethod(pData, len); // for example At runtime aClassName whould be the actual class, for example would resolve to: BobsClass::StaticMethod(pData, len); In Java I think I would use the class "Class" to do something like this, but dont know how in C++. Thanks for any help, -K __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

2 1

RE: [Boost-users] [spirit] parse(iter,iter,rule)
by Hartmut Kaiser 17 May '05

17 May '05

Sorry... > Thorsten Ottosen wrote: > > > Shouldn't it be possible to parse with the following syntax: > > > > std::string text( "fooooo"); > > static rule<> r = *space_p >> '"' >> > > (*alnum_p)[assign_a(name)] >> '"'; > > parse_info<std::string::const_iterator> info = > > boost::spirit::parse( text.begin(), text.end(), r ); > > > > How do I otherwise interpret > > > > http://www.boost.org/libs/spirit/doc/scanner.html > > > > ? > > It should be: > > std::string text( "fooooo"); > static rule<std::string::iterator> r = > *space_p >> '"' >> (*alnum_p)[assign_a(name)] >> '"'; > parse_info<std::string::const_iterator> info = It should be: parse_info<std::string::iterator> info = > boost::spirit::parse( text.begin(), text.end(), r ); Regards Hartmut

2 4

a generic factory for boost
by martin f krafft 17 May '05

17 May '05

I cannot find a generic factory implementation in boost. I have implemented my own, lightweight and header-only factory class: libfactory++ [http://freshmeat.net/projects/libfactory] which I would like to make available to boost. It takes a somewhat curious approach to custom constructors (using the Command pattern), and it still has a TODO list that's non-empty, but I would be happy to submit this work to boost. Question is: is there interest for this? View the tree online: http://xrl.us/f4r5 [0] 0. http://arch.madduck.net/cgi-bin/archzoom.cgi/madduck@arch.madduck.net--2005… -- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck invalid/expired pgp subkeys? use subkeys.pgp.net as keyserver! spamtraps: madduck.bogus(a)madduck.net your eyes are weary from staring at the CRT. you feel sleepy. notice how restful it is to watch the cursor blink. close your eyes. the opinions stated above are yours. you cannot imagine why you ever felt otherwise.

2 3

Run-time problem with VC6, stlport and boost (1.32) regex
by Mats Lidell 17 May '05

17 May '05

Hi, I'm getting this runtime error in my program. c:\stlport-4.6.2\stlport\stl\debug\_iterator.h(179): STL assertion failure : __check_same_owner(__x, __y) The code that causes this is like this (Actual code slightly modified). It is the access of the match that triggers the error above. boost::smatch m; if (regex_match(s, m, reg)) { (here)--> s_info.version = m[1]; } I'm using stlport 4.6.2 with boost-1.32 on W2K and VC6 SP6. stlport is built with default options and boost is built like this: boost-jam-3.1.10-1-ntx86/bjam.exe -sTOOLS=msvc-stlport -sSTLPORT_PATH="c:" -sSTLPORT_VERSION=4.6.2 -sBUILD="debug release <runtime-link>static <threading>multi <stlport-iostream>on" install Any idea what can be wrong? Surely a simple access of the resulting match shouldn't cause this type of assertion to fire (or is there some subtle bug in my program that I'm missing!?) Please note that the program works OK using boost without stlport. Yours -- %% Mats

2 2

fatal error C1204 on MS .Net with boost serialize
by Olivier Vanden Bos 17 May '05

17 May '05

I ve got a lot of this, i m forced to split all declarations of classes in separate .cpp file. In fact, Boost::serialize become unusable... Does somebody have a solution ? - VDB - "LNK2019: unresolved external symbol" Olivier Vanden Bos MSN#TheVdeub(a)hotmail.com AI Programmer UBISOFT Montreal

2 1

boost.serialization crash
by Eyal Susser 17 May '05

17 May '05

Hi, I was using the boost.serialization library to my great satisfaction on an intel machine running Linux. I then ported the code to a MIPS machine. I compiled boost using bjam with a mips compiler that isn't included in the available toolsets. Everything works well _until_ I try destroying the binary archives I use. When the destructor is called, I get a segmentation fault. My guess is that the serialization library relies on something else which wasn't compiled properly. But what? I built boost as follows: bjam -sTOOLS=gcc -sGXX=/usr/mips/bin/mips-linux-g++ --libdir=/usr/mips/lib/ --includedir=/usr/mips/include/ -sGCC_ROOT_DIRECTORY=/usr/mips install I have a lib directory and an include directory under /usr/mips. While building boost I got a whole bunch of errors, and not all the targets were successfully built, but I had no idea what to do, so I tried anyway... Thanks

2 2

[spirit] parse(iter,iter,rule)
by Thorsten Ottosen 16 May '05

16 May '05

Hi Shouldn't it be possible to parse with the following syntax: std::string text( "fooooo"); static rule<> r = *space_p >> '"' >> (*alnum_p)[assign_a(name)] >> '"'; parse_info<std::string::const_iterator> info = boost::spirit::parse( text.begin(), text.end(), r ); How do I otherwise interpret http://www.boost.org/libs/spirit/doc/scanner.html ? Thanks -Thorsten -- Thorsten Ottosen ---------------------------- www.dezide.com http://www.cs.aau.dk/index2.php?content=Research/mi www.boost.org www.open-std.org/JTC1/SC22/WG21/

2 1

[spirit] why don't parse( iter, iter, rule ) work?
by Thorsten Ottosen 16 May '05

16 May '05

-- Thorsten Ottosen ---------------------------- www.dezide.com http://www.cs.aau.dk/index2.php?content=Research/mi www.boost.org www.open-std.org/JTC1/SC22/WG21/

2 1

[Signals] Observation about performance
by Keith MacDonald 16 May '05

16 May '05

I have an application that implements the Observer pattern, based on the GOF code and was interested in using Boost.Signals in a new application. Before committing myself, I decided to check the relative performance when signalling two observers. Both tests were performed on Windows XP, using MSVC 8 beta 2, with the /Ox optimisation. Here are the times for 6,000,000 signals, measured with the Win32 GetTickCount() API on a 3GHz P4 with 1GB RAM: GOF Observer: 109 Boost.Signals: 6203 Clearly, you have to trade convenience for performance with this library. - Keith MacDonald

4 8

Declaring boost.serialization archivers as members
by Eyal Susser 16 May '05

16 May '05

Hi, After doing what I described in the subject, I found that when marshalling data between processes, the same data gets sent over and over again. It's as if the archiver has some internal copy of the stream, and keeps serializing that stream over and over. Anyone else have this problem, or is it some pitfall in my implementation? Thanks

2 2

Compiler status table for Boost v1.32?
by Moore, J. David 16 May '05

16 May '05

Hello, I am interested in seeing the compiler status page for the 1.32 release of Boost. I was able to follow links on www.boost.org to see the compiler status for the head of the cvs repository: http://www.meta-comm.com/engineering/boost-regression/CVS-HEAD/developer /index.html, However, I could not find information for previous releases. Is this information archived anywhere? Thanks, Dave Moore IMPORTANT: The information contained in this email and/or its attachments is confidential. If you are not the intended recipient, please notify the sender immediately by reply and immediately delete this message and all its attachments. Any review, use, reproduction, disclosure or dissemination of this message or any attachment by an unintended recipient is strictly prohibited. Neither this message nor any attachment is intended as or should be construed as an offer, solicitation or recommendation to buy or sell any security or other financial instrument. Neither the sender, his or her employer nor any of their respective affiliates makes any warranties as to the completeness or accuracy of any of the information contained herein or that this message or any of its attachments is free of viruses.

3 2

numeric conversion lib documentation
by Jeremy Siek 16 May '05

16 May '05

The docs for the converter class are missing descriptions of the two most important template parameters, T and S. http://www.boost.org/libs/numeric/conversion/doc/converter.html Cheers, Jeremy _______________________________________________ Jeremy Siek <jsiek(a)osl.iu.edu> http://www.osl.iu.edu/~jsiek Ph.D. Student, Indiana University Bloomington C++ Booster (http://www.boost.org) _______________________________________________

3 3

Can boost::threads be started in detached state ?
by Shetty, Diwakar 16 May '05

16 May '05

Hi, I am using boost:thread. There does not seem to be any constructor which specifies whether the thread can be started in detached state. Will I have to use the native OS threading calls to do this? Thanks, Diwakar

2 1

RE: [Boost-users] Re: Question
by Sliwa, Przemyslaw (London) 16 May '05

16 May '05

This returns in both cases the same value. Is there a way around this problem at all? Thanks Pshemek -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Eric Niebler Sent: 12 May 2005 18:13 To: boost-users(a)lists.boost.org Subject: [Boost-users] Re: Question Sliwa, Przemyslaw (London) wrote: > Thanks for help, > > I have an additional question. Does anyone know why the following > program gives different output on VC++ 6 and VC++ 2003 NET? It is pretty > strange, isn't it? > <snip> VC6 is pretty strange, I agree. In particular, it doesn't handle functions with non-type template parameters well. The following code should demonstrate the problem. (Hopefully I'm remembering the problem correctly -- I don't have VC6 installed on this machine.) template<int I> void foo() { std::cout << I << '\n'; } int main() { foo<1>(); foo<2>(); return 0; } If you must use VC6, avoid non-type template parameters for function templates. -- Eric Niebler Boost Consulting www.boost-consulting.com _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users -------------------------------------------------------- If you are not an intended recipient of this e-mail, please notify the sender, delete it and do not read, act upon, print, disclose, copy, retain or redistribute it. Click here for important additional terms relating to this e-mail. http://www.ml.com/email_terms/ --------------------------------------------------------

3 2

shared_ptr, intrusive_ptr ...
by Jean-François Brouillet 15 May '05

15 May '05

I'm confused again :( I've read the note about shared_ptr & this in the documentation, but I'm still a bit lost as to how I'm supposed to overcome the problem. The code below would work fine if I were to remove all this smart pointer business and handle new & delete by hand. But because this kind of code is just so typical of the huge Java library I'm porting, there's not much choice but to get an as "surprise free" object model as possible. As far as I understand what is going on, the reason why the runtime is reporting a "double free" is because two independently constructed shared_ptrs' do not share the same reference count, which intrusive_ptr would allow me to do, except that intrusive_ptr doesn't vary "polymorphically" with its body as shared_ptr does. Obviously, I could "roll my own" solution by modifying shared_ptr to use a common reference count the way intrusive_ptr does, but I was wondering: is that my only course of action? Or has anyone found a workaround/clever use of the boost::xxx_ptr to overcome this situation? Many thanks -- JFB #include <iostream> #include <boost/shared_ptr.hpp> struct TaskDoneStruct { virtual void success() = 0 ; virtual void failure() = 0 ; } ; typedef boost::shared_ptr<TaskDoneStruct> TaskDone ; struct LongTaskStruct { TaskDone callback ; virtual void setCallback(const TaskDone& td) { this->callback = td ; } virtual void run() { start() ; complete() ; } virtual void start() = 0 ; virtual void complete() { if (callback) { callback->success() ; } } virtual ~LongTaskStruct() {} } ; struct MyTaskStruct : public LongTaskStruct, TaskDoneStruct { MyTaskStruct() { setCallback(TaskDone(this)) ; // this is the root of the // double free problem } virtual void start() { std::cout << "Starting lengthy process ..." << std::endl ; } virtual void success() { std::cout << "Done lengthy process ..." << std::endl ; } virtual void failure() { std::cout << "Aborted lengthy process ..." << std::endl ; } } ; typedef boost::shared_ptr<MyTaskStruct> MyTask ; void tastTest() { MyTask myTask(new MyTaskStruct) ; myTask->run() ; } int main( int argc , char * argv) { std::cout << "Tests starting ..." << std::endl ; tastTest() ; std::cout << "Tests done ..." << std::endl ; return 0 ; } /* BoostTests(1270) malloc: *** Deallocation of a pointer not malloced: 0x300180; This could be a double free(), or free() called with the middle of an allocated block; */

3 11

Re: shared_ptr, intrusive_ptr ...
by Gottlob Frege 15 May '05

15 May '05

> Date: Sun, 15 May 2005 12:00:55 +0100 > From: Jean-Fran?ois Brouillet <verec(a)mac.com> > Subject: [Boost-users] Re: shared_ptr, intrusive_ptr ... > To: boost-users(a)lists.boost.org > Message-ID: <A42134A2-8F76-4A80-956A-D0070056100F(a)mac.com> > Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed > > On 2005-05-15 00:49:54 +0100, "Peter Dimov" <pdimov(a)mmltd.net> said: > > > Anyway, here's my revised snippet that satisfies all my criteria: > -- > JFB > > #include <iostream> > > #include <boost/intrusive_ptr.hpp> > > struct ObjectStruct { > int refCount ; > > ObjectStruct() : refCount(0) { > std::cout << std::hex << (int) this << " - I'm born" << > std::endl ; > } > > void refer() { ++refCount ; } > void unrefer() { if (--refCount == 0) delete this ; } > > virtual ~ObjectStruct() { > std::cout << std::hex << (int) this << " - I'm gone" << > std::endl ; > } > } ; > > void intrusive_ptr_add_ref(ObjectStruct * p) { p->refer() ; } > void intrusive_ptr_release(ObjectStruct * p) { p->unrefer() ; } > Are you going to make it thread-safe (or is that something you just left out of the example?)?

1 0

[ANN][fsm][statechart] New interface available
by Andreas Huber 15 May '05

15 May '05

During the review it was decided to change the interface of the fsm submission as follows: - Library name and namespace are changed to statechart - Reactions are specified with a member typedef in the state type instead of a type that is passed as template argument A version with the above changes applied can be found in the sandbox under the statechart directories and here: http://boost-sandbox.sf.net/Statechart.zip The docs can also be browsed online: http://boost-sandbox.sf.net/libs/statechart I have not yet had the time to document the new reaction specification interface but it should be obvious how to use it from the examples and the tests. Feedback is highly welcome. Thanks & Regards, Andreas P.S. Future posts regarding this library will no longer carry the tag [fsm] but only [statechart] -- Andreas Huber When replying by private email, please remove the words spam and trap from the address shown in the header.

1 0

looped typedefs and/or class definitions
by martin f krafft 14 May '05

14 May '05

Some of my code includes the following (abbreviated): typedef Edge<Node0000Type, Node0000Type> Edge00000000Type; typedef Edge<Node0000Type, Node0001Type> Edge00000001Type; typedef Edge<Node0000Type, Node0010Type> Edge00000010Type; typedef Edge<Node0000Type, Node0011Type> Edge00000011Type; //... you can imagine where this is going. Instead of 32 typedefs, I was wondering if it weren't possible to use the compiler to achieve the above. Similarly, let's say I wanted to define a set of empty classes: class AB : public A, B {}; class AC : public A, C {}; class BC : public B, C {}; can I use the compiler to automate this? Thanks for any comments. -- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck invalid/expired pgp subkeys? use subkeys.pgp.net as keyserver! spamtraps: madduck.bogus(a)madduck.net "arguments are extremely vulgar, for everyone in good society holds exactly the same opinion." -- oscar wilde

2 1

[mpl] calling a function depending on type or instance as argument
by martin f krafft 14 May '05

14 May '05

Dear all, another MPL question (at least I think it's the domain of MPL): I have a templated class Foo and need to make an instance based on the type of an instance at various points in the code, which is simple: template <typename T> Foo<T> get_foo_for(T const&) { return Foo<T>; } //... get_foo_for(myObj).doSomethingWithFoo(); At times, I don't have an instance of an object, just the typename. I do not want to assume that all types are default constructible (which could be expensive anyway), so I have to do: Foo<T>().doSomethingWithFoo(); I am hiding these two behind two separate macros which I would like to unify. The situation is actually more complex but boils down to the following question: How can I create a macro (#define) such that its definition does different things when passed an instance or a typename. Something like: if is_type(Arg) do_this(); else do_that(); Again, I cannot figure this out from the MPL docs. There is enable_if and if_c, but both seem to deal with the definition of symbols and/or types, not with the selection of functions to call. I appreciate any hint. -- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck invalid/expired pgp subkeys? use subkeys.pgp.net as keyserver! spamtraps: madduck.bogus(a)madduck.net "arguments are extremely vulgar, for everyone in good society holds exactly the same opinion." -- oscar wilde

1 0

[mpl] calling a function depending on availability of *this
by martin f krafft 14 May '05

14 May '05

Dear all, I am trying to create an assertion macro which can be used inside and outside of class member functions. When inside a class, I want it to be able to use information from *this, which obviously does not exist outside of a class member function. Right now, I have two different macros and I would like to unify the API. The situation is actually more complex but boils down to the following question: How can I create a macro (#define) such that its definition does different things when inside a class member function than outside. Something like: if exists(*this) assertion(a, *this); else assertion(a); such that this is resolved to either of the assertion() overloads at compile time. I guess this is the domain of MPL, but my head just doesn't work in MPL-terms (yet). I would appreciate if someone gave me a solution to this case and promise to try to work my way into MPL more with it. -- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck invalid/expired pgp subkeys? use subkeys.pgp.net as keyserver! spamtraps: madduck.bogus(a)madduck.net "arguments are extremely vulgar, for everyone in good society holds exactly the same opinion." -- oscar wilde

1 0

enable_if< is_convertible > w/ explicit constructor trouble
by me22 14 May '05

14 May '05

After reading a recent Joel on Software article ( http://www.joelonsoftware.com/items/2003/10/13.html ) and the discussion it generated, I decided to try to write some sort of general strong typedef. I've started out by creating a specific class similar to what would be generated by a `typedef strong_typedef<tag,wrapped_type> name;`, and am trying to use enable_if and is_convertible to allow explicit construction from any type that can be converted to the wrapped type. Unfortunately, I keep getting errors such as the following: main.cpp:36: error: no matching function for call to `position::position(int)' main.cpp:7: error: candidates are: position::position(const position&) main.cpp:14: error: position::position() Compiler version: g++ (GCC) 3.3.5-20050130 (Gentoo Linux 3.3.5.20050130-r1, ssp-3.3.5.20050130-1, pie-8.7.7.1) Here's the cut down code. I'd greatly appreciate it if someone could point me towards what I'm doing wrong. Hopefully I'm just missing something elementary. ( I'm quite new to these boost features. ) On a side note, has anyone come up with a good method of wrapping these rather long SFINAE calls? Thanks, - Scott McMurray // begin code // #include <boost/type_traits.hpp> #include <boost/utility/enable_if.hpp> class position { public: typedef position my_type; typedef unsigned wrapped_type; private: wrapped_type m_data; public: position() {} // This works fine explicit position(boost::enable_if< boost::is_convertible<int, wrapped_type>, int>::type f) : m_data( f ) {} /* // But if I try this, I get the errors template <typename fT> explicit position(typename boost::enable_if< boost::is_convertible<fT, wrapped_type>, fT>::type f) : m_data( f ) {} */ }; int main(int argc, char* argv[]) { position x = position(5); } // end code //

3 4

numeric_cast
by Marcin Kalici�ski 13 May '05

13 May '05

How do I make boost::numeric_cast work with a custom class? What templates do I need to specialize? converter? numeric_cast itself? The documentation is not quite clear about that, I have read it and studied the source code for some time, but found no clue. I think there should be a section about that in the docs. cheers, M.

2 1

Serialization of cross-pointing objects
by Henrik Jacobsson 13 May '05

13 May '05

Hi! I want to serialize objects that link to each other through pointers, like a linked list, but in this case a more complex graph with several different classes and proxies (a graph which can contain loops and and null-pointers). But I get the "pointer conflict" exception since the serialization discovers that an object have been serialized once before through its pointer. The contents should be serialized/deserialized only once, and then the pointers should just be kept consistent. An alternative is of course to replace all the pointers with indeces which are memory-independent. But that's a messy affair. In the copy constructor I solved something similar through a map<Type*,Type*> which mapped from the old pointers to the newly allocated ones, so that they could be properly replaced. Is something like this hidden somewhere in the lib? Any suggestions? Best regards, Henrik Jacobsson

3 15

RE: [Boost-users] what gets posted
by Marcin Tustin 13 May '05

13 May '05

I believe so. I never see messages I post, or at least I didn't until I went over to daily digests. > -----Original Message----- > From: Andreas Fabri [mailto:Andreas.Fabri@geometryfactory.com] > Sent: 13 May 2005 10:44 > To: boost-users(a)lists.boost.org > Subject: [Boost-users] what gets posted > > > Hello, > > I recently posted a mail to the list, and got this mail from > boost-users-bounces(a)lists.boost.org > > ___________________________________________________________ > > Your message entitled > > BGL question: edge order > > was successfully received by the Boost-users mailing list. > > List info page: > http://lists.boost.org/mailman/listinfo.cgi/boost-users > Your preferences: > http://lists.boost.org/mailman/options.cgi/boost-users/andreas .fabri%40geometryfactory.com > > > ___________________________________________________________ > > > I find it in the archive, but I didn't receive it as mail. > Is this the policy of the list, that is I have to cc: it to myself? > > andreas > >

1 0

program_options and ->notify(&your_function)
by Susan Flynn 13 May '05

13 May '05

Hi, I'm new to boost (and c++) and I've just started using program_options. Great concept and code, it has saved me a lot of time/effort, thanks. I am having a problem with the ->notify(&your_function) in add_options. I get a compile error (g++ on redhat): "invalid use of void expression". If I comment out the ->notify(&func) part, the code compiles. This is the code: void Report::PrintName(const string name) { cout << " the log name is " << name << "\n"; } void Report::InitCmdOpts(void) { try { p_opts = new po::options_description("Reporting"); p_opts->add_options() ("log", po::value< string >() ->default_value("sys.log") ->notify( &Report::PrintName)) ; } ...catch code... } Any help/ideas appreciated. I'm hoping it's something simple and my lack of c++ knowledge is showing. I've already simplified the code and tried several modifications, but the compile error persists. thanks, susan. __________________________________ Do you Yahoo!? Yahoo! Mail - You care about security. So do we. http://promotions.yahoo.com/new_mail

2 4

what gets posted
by Andreas Fabri 13 May '05

13 May '05

Hello, I recently posted a mail to the list, and got this mail from boost-users-bounces(a)lists.boost.org ___________________________________________________________ Your message entitled BGL question: edge order was successfully received by the Boost-users mailing list. List info page: http://lists.boost.org/mailman/listinfo.cgi/boost-users Your preferences: http://lists.boost.org/mailman/options.cgi/boost-users/andreas.fabri%40geom… ___________________________________________________________ I find it in the archive, but I didn't receive it as mail. Is this the policy of the list, that is I have to cc: it to myself? andreas

2 1

need help about wide character stream
by Tom Tan (SH/RDC) 13 May '05

13 May '05

hi,all i have 3 questions. 1. When i was trying wide character streams like wifstream ,wofstream , wcout etc. , i failed every time. My default locale is en_US.UTF-8. I created a test file , wrote a line Chinese "??" in that file. Then I try to use wifstream to read that file, after reading, i print it to stdout and write to another file. As a result , i got nothing. Assuming "input.txt" is the input file which contains Chinese character. BTW , input.txt is encoded with UTF-8. locale.global("en_US.UTF-8"); wifstream win("input.txt"); wcout<<win.rdbuf()<<endl; wofstream wout("output.txt"); wout<<win.rdbuf()<<endl; wout.close(); I got ouput: $ <nothing> $ wc -c outpu.txt $ 0 output.txt I am deeply puzzled, How does wide character stream works? 2. Can anybody explain why IBM ICU (International Component for Unicode) exists? What 's it for by comparing with stdc++ wide character mechanism? If it is necessary , is there any consideration to invent a similar package in BOOST? 3. Since my post looks more like a stdc++ question , anybody can tell me how i can join a stdc++ mail list? Thanks in advance. /Tom

1 0

[iostreams] calling sink member function
by Daniel Schlyder 13 May '05

13 May '05

Hi, The following used to compile with MinGW GCC 3.4.2: <code> #include <boost/iostreams/concepts.hpp> #include <boost/iostreams/stream_facade.hpp> #include <iostream> class my_sink : public boost::iostreams::sink { public: std::streamsize write(char const *, std::streamsize size) { return size; } void foo() { std::cout << "foo() called" << std::endl; } }; int main() { boost::iostreams::stream_facade<my_sink> out; out->foo(); return 0; } </code> Now I get the following error: E:/libs/boost/boost/iostreams/stream_facade.hpp: In member function `my_sink * boost::iostreams::stream_facade<my_sink, char_traits<char> > ::operator->()': boost_iostreams_issues.cpp:36: instantiated from here E:/libs/boost/boost/iostreams/stream_facade.hpp:119: error: no match for 'operator *' in '*( ( ( boost::base_from_member< boost::iostreams::streambuf_facade< my_sink, char_traits<char>, boost::iostreams::output >, 0 > * )( (boost::iostreams::stream_facade<my_sink, char_traits<char> > * )this ) ) + 4u )->boost::base_from_member< boost::iostreams::streambuf_facade< my_sink, char_traits<char>, boost::iostreams::output >, 0 >::member' It compiles if I remove the call to foo(). What must I do to make it work again? Thanks, -- Daniel Schlyder http://bitblaze.com/

2 2

RE: [Boost-users] Re: Question
by Sliwa, Przemyslaw (London) 12 May '05

12 May '05

Thanks for help, I have an additional question. Does anyone know why the following program gives different output on VC++ 6 and VC++ 2003 NET? It is pretty strange, isn't it? Thanks in advance. Pshemek #include <iostream> #include <cmath> using namespace std; class A { protected: char m_d; }; class B : public A { public: typedef char s; private: unsigned short g; }; class C : public A { public: typedef short unsigned s; private: unsigned d; }; template<bool cond> class Select {}; template<> class Select<true> { static void Statment1(double g) { cout << g*g << endl; } public: static void f(double g) { Statment1(g); } }; template<> class Select<false> { static void Statment2(double g) { cout << sqrt(g) << endl; } public: static void f(double g) { Statment2(g); } }; template<bool cond> void exec() { Select<cond>::f(3.0); } template<class T> void foo() { exec<sizeof(T::s)==sizeof(B::s)>(); exec<sizeof(T::s)==sizeof(C::s)>(); } int main() { foo<B>(); foo<C>(); return 0; } -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Eric Niebler Sent: 11 May 2005 18:37 To: boost-users(a)lists.boost.org Subject: [Boost-users] Re: Question Sliwa, Przemyslaw (London) wrote: > > I would like to write a template which depending on the argument type > does different things. > > For example the pseudo code: > > template <class T, class C> > foo(T& nT, C& nC) > { > // common code; > if(T==C) > // specific code; > ..... > > // again common code; > } > > Can the template meta programming help me in this case? It may. It depends on whether "specific code" compiles when T!=C. If it does, you could do this: template <class T, class C> void foo(T& nT, C& nC) { // common code if(boost::is_same<T,C>::value) { /* specific code */ } // again common code } where is is_same<> is defined in boost/type_traits/is_same.hpp. If "specific code" doesn't compile when T!=C, you need to get fancier. An overloaded helper function is the way to go: template<class T, class C> void specific_code(T&, C&) {} template<class T> void specific_code(T&, T&) { // specific code here } template <class T, class C> void foo(T& nT, C& nC) { // common code specific_code(nT, nC); // again common code } HTH, -- Eric Niebler Boost Consulting www.boost-consulting.com _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users -------------------------------------------------------- If you are not an intended recipient of this e-mail, please notify the sender, delete it and do not read, act upon, print, disclose, copy, retain or redistribute it. Click here for important additional terms relating to this e-mail. http://www.ml.com/email_terms/ --------------------------------------------------------

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Boost config compiler file for gcc 4.1
by Michael Hopkins 12 May '05

12 May '05

Hi all My first post to the list as a new Boost user. I'm sure there will be many more! Have just started to use GCC 4.1 tools and get this warning: In file included from /usr/local/include/boost/config.hpp:35, from /usr/local/include/boost/detail/iterator.hpp:53, from /usr/local/include/boost/array.hpp:32, from /home/mwh/Coding/C++/Headers/uo_container.hpp:15, from test2.cpp:16: /usr/local/include/boost/boost/config/compiler/gcc.hpp:92:7: warning: #warning "Unknown compiler version - please run the configure tests and report the results" So I was wondering, does a new config file /usr/local/include/boost/boost/config/compiler/gcc.hpp exist that deals with the latest GCC versions? I'm also not sure what the 'configure tests' are but I'm happy to run them if someone will point me to the relevant documentation. I'm on FreeBSD amd64 if that is of any use. TIA Michael P.S. Please cc repies to me if possible. _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ _/ _/ _/_/_/ Hopkins Research Ltd _/ _/ _/ _/ _/_/_/_/ _/_/_/ http://www.hopkins-research.com/ _/ _/ _/ _/ _/ _/ _/ _/ 'touch the future' _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/

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Program options
by Stephen Henry 12 May '05

12 May '05

Hi all, I am having a small problem with boost's program options library. In the documentation it states that to parse a command file you are suppose to use the "parse_command_file" function as follows: parse_config_file("example.cfg", desc) When attempting this, my compiler (gcc 3.3.3) issues an error stating: decoder.cpp:61: error: no matching function for call to `parse_config_file( const char[12], boost::program_options::options_description&)' It appears that opposed to calling the constructor for basic_istream the compiler attempts to find a function with char[12] as the first argument. To circumvent this error I can do the follow: Std::ifstream in( "config.cfg" ); Parse_config_file( in, desc ); And it works. I would rather use the first method opposed to the second so is there someway for it to be used instead? Thanks, Stephen

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Socket Library?
by Groleo Marius 12 May '05

12 May '05

Hi. Is the socket library found at: http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?BoostSocket in the boost repository? Cause on my gentoo, it doesn't seem to be installed. -- Regards, Groleo! # touch universe # chmod +rwx universe # ./universe

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Spelling out numbers: One, two, three, etc...
by Chateauneu Remi 12 May '05

12 May '05

Is there any library for spelling out numbers in different languages ? 1: One,Ein,Un 2: Two,Zwei,Deux 3: Three,Drei,Trois ... 97: Ninety-seven,Sieben und neunzig,Quatre-vingt-treize The algorithms are clearly specific to each languages. If it does not exists yet, it would be an interesting cooperation project for the many nationalities of Boost users. -- +++ Lassen Sie Ihren Gedanken freien Lauf... z.B. per FreeSMS +++ GMX bietet bis zu 100 FreeSMS/Monat: http://www.gmx.net/de/go/mail

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Boost.python-Inner class
by pankaj jain 12 May '05

12 May '05

Hi , I have C++ code like class A { class B; --- --- } can any body help me in how I can map inner class for building python module. Thanks __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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Can't get "write" to work when using IOStreams with custom streambuf
by Eyal Susser 11 May '05

11 May '05

Hi, Boost is a really neat idea, I wish I had less trouble using it (so embarrasing...). Anyway, here's a streambuf class I wrote using IOStream : class CrIPCStreamOutput : public sink { public: CrIPCStreamOutput(RU8 * pio_pInputStorage , RS32 & pio_nStorageLen) : m_pBuffer(pio_pInputStorage), m_nBufferLen(pio_nStorageLen) { } virtual ~CrIPCStreamOutput() { } void write(const char * s , std::streamsize n) { if(!m_pBuffer) { m_nBufferLen = -1; return; } memcpy(m_pBuffer , s , n); m_nBufferLen = n; return; } private: unsigned char *& m_pBuffer; int & m_nBufferLen; }; In my main, I do: int main() { unsigned char p[256] = {0}; int n = sizeof(p); streambuf_facade<CrIPCStreamOutput> sbo(CrIPCStreamOutput(p , n)); //stream_facade<CrIPCStreamOutput> stro(CrIPCStreamOutput(p , n)); iostream stro(&sbo); stro.write("Hello?" , 6); cout << p << endl; return 0; } But the ouput from cout is an empty string, although when debugging I can see m_pBuffer being copied to. How can I get this to work? The motivation for the whole thing is serialization: I want to serialize a class using the boos.serialization lib, for which I need a stream, which has to have certain properties (not shown here). I need to have the archiver write to a specific buffer. IOStreams should do it (I got the reading side working fine), but how? Thanks.

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