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[interprocess] boost::interprocess::basic_string and VS2005 watch window
by Jason Sachs 20 Jun '08

20 Jun '08

I am trying to debug some work with basic_string<>s in shared memory with Micro$oft VS2005. does anyone have an expression for the autoexp.dat file that works with boost interprocess basic_strings to view the string it contains? I'm fighting some weird bug. (also is there a problem with this listserver? I sent a msg to it twice & it appears to have disappeared into the ether)

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[boost-users][hash] adding hash_value to boost namespace(s)?
by Igor R 20 Jun '08

20 Jun '08

Hi, I'd like to define hash_value() for some types defined in Boost, in order to use those types in hashed containers. It seems that the only way to do this is to define hash_value() in namespace boost, or the inner namespaces (where the desired type is defined) - isn't it? Is this legal? Thank you, Igor'.

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Message Queues with Strings instead of Integers
by Julian Magnone 20 Jun '08

20 Jun '08

Hi, We are serializing an object to a string and then we want to send it to another process using MQ. When received, it's deserialized and the original object is reconstructed again. We are trying to use message_queue from Boost Interprocess but we still having some troubles sending String messages. (I've been noticed about the boost examples using integers) The first issue is about std::string. I read on boost documentation that MQ do not works with std::string so my first attempt was to use boost::interprocess:string. However, I've received library error while trying to use interprocess::string, so I tried to use std::string and mysteriously it worked fine. After we change the application to another machine with the same configuration, it didn't work again, so I guessed that's the clue why std::string is not guarantee to work in all cases. My question is, what should be the right way to transmit a string message using MQ? Thanks in advance, Julian Magnone

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[serialization] class names in xml archives
by Kabanov, Alexander 20 Jun '08

20 Jun '08

Hi I have recently began familiarising myself with the serialization library (Boost 1.35). I am specifically interested in XML serialization. This is probably a trivial question: can you get the actual name of the class to appear in the opening tag of the class instance? All I get so far is the class_id for the first instance and class_id_reference thereafter. This does make sense, of course, but I would like to know if this really is the default behaviour, and if it is, can it be changed to display the class name? Thanks Alexander Kabanov

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Patch for building Boost with GCC 4.4.0
by Chris Fairles 20 Jun '08

20 Jun '08

GCC changed the way #elif's are handled (is now more std-compliant apparently) but this broke all the #elif BOOST_PP_ITERATION_DEPTH() == N lines. They need to be replaced with #elif defined(BOOST_PP_ITERATION_DEPTH) #if BOOST_PP_ITERATION_DEPTH == N ... #endif Attached is a patch that does so (against trunk). Cheers, Chris

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VS 2008 and boost::thread (possibly /clr related?)
by Alfonso Urdaneta 20 Jun '08

20 Jun '08

My situation is as follows. Using Visual Studio 2008 C++ (express) and boost 1.35 (binary install). Create /clr application, add the libraries for the compiler and the linker, change from /clr pure to straight /clr so that it compiles. If I then add a file that contains absolutely nothing other than "#include <boost/thread.hpp>", my application will not launch, giving an error dialog saying that it failed to initialize. My apologies for asking what is possibly a trivial question, but I've searched the archives and found many questions, but few answers. -- alfonso e. urdaneta _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ This e-mail and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error please notify the originator of the message. This footer also confirms that this e-mail message has been scanned for the presence of computer viruses. Any views expressed in this message are those of the individual sender, except where the sender specifies and with authority, states them to be the views of Indra Systems, Inc.

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Compile error using serialize
by Daniel Hinz 20 Jun '08

20 Jun '08

Just started experimenting with the serialization library. I started by writing a small example very much like that shown in the tutorial. I created a simple class to serialize containing two unsigned int vars and an std::string This is close to what I would need to do once I move beyond familiarizing myself with the use of the library. When I compile I get errors in the boost code: s-test.h:49: instantiated from here /usr/include/boost/archive/detail/oserializer.hpp:567: error: invalid application of 'sizeof' to incomplete type 'boost::STATIC_ASSERTION_FAILURE<false>' make: *** [stest] Error 1 When I look at boost static assert I find this: #define BOOST_STATIC_ASSERT( B ) \ typedef ::boost::static_assert_test<\ sizeof(::boost::STATIC_ASSERTION_FAILURE< (bool)( B ) >)>\ BOOST_JOIN(boost_static_assert_typedef_, __LINE__) #endif Which I believe is macro expansion sizeof that is being complained about. I'm using boost 1_35_0 (release tarball), gcc 4.1.2, Fedora 7. Looking for hints as to where to go from here. Thanks, -dwh- -- I not only live each endless day in grief, but live each day thinking about living each day in grief. -- C. S. Lewis ------------------------------------------------------------ Daniel W. Hinz Xerox Corp;XOG/SEEDU MS: 801-17A e-mail: dan.hinz(a)xerox.com 1350 Jefferson Road TEL: 585.422.8078 Rochester, NY 14623

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lambda and throw()
by Trigve Siver 20 Jun '08

20 Jun '08

Hi, The following example fails to compile with MS Visual Studio 2005 SP1 Is there any solution? --- #include <boost/lambda/bind.hpp> int main() { namespace bll = boost::lambda; struct A { void a1() {} void a2() throw() {} }; A a; bll::bind(&A::a1, bll::_1)(a); // OK bll::bind(&A::a2, bll::_1)(a); // Fails } error C2664: 'boost::lambda::lambda_functor<T>::lambda_functor(const boost::lambda::lambda_functor<T> &)' : cannot convert parameter 1 from 'boost::lambda::lambda_functor_base<Act,Args>' to 'const boost::lambda::lambda_functor<T> &' thanks Trigve

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[Asio] Cannot set port number on endpoint
by Jonathan Locke 20 Jun '08

20 Jun '08

Hi, I'm new to Boost and am trying to write a command line networking tool. I am currently working in Windows XP SP2 using MS Visual Studio 2005. I use the default compiler. I have read a few tutorials and examples on using Asio, and thus wrote my app using that information, as well as information from the reference library. Currently the problem that I have is that I cannot set the port used by the endpoint to the value I want - 10540 - it is always set to 11035. I'm not sure why this is, I cant find the number 11035 anywhere in the code or documentation so I am not sure where it comes from. I have tried to instantiate a new endpoint using the IPv4 address as a string and the port number as a short, and have also tried to construct a query that specifies the protocol, host name, service name (port number in this case) and the numeric_service flag. In either case, when I debug, the port of the endpoint is always 11035, no matter what I set it to. I am able to connect to the endpoint, but not able to write data to it. I get a "File handle supplied is not valid error message". I presume the most likely reason for this is that the port 11035 is not open. The machine that I am trying to connect to is running Red Hat EL4 Update 4. I would appreciate any help in this matter. Thank you, Jonathan.

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[iostreams] buffer flushing problem
by Darren Kessner 19 Jun '08

19 Jun '08

Hi all, I have encountered some strange behavior while using the Boost iostreams zlib compression filter. The problem is tricky to reproduce -- I have posted a tarball that includes an example program (pasted below) together with a 72k binary file that will be read in and compressed: http://proteowizard.sourceforge.net/temp/zlib_error.tgz If you're curious, the 72k data array comes from an array of doubles, which were intensities from a single scan on a mass spectrometer. The problem occurs on platforms darwin, gcc, msvc. In general, the functions run_filter_1 and run_filter_2 produce identical output. However, when the input is the binary array read in from the 72k file, run_filter_1 appears not to flush some buffer properly. This may be due to my ignorance of how to force the buffers to flush, though it's not clear to me that this should be necessary with the use of boost::iostreams::copy(). Thank you in advance for any help! Darren #include "boost/iostreams/filtering_streambuf.hpp" #include "boost/iostreams/filtering_stream.hpp" #include "boost/iostreams/copy.hpp" #include "boost/iostreams/filter/zlib.hpp" #include "boost/iostreams/device/array.hpp" #include <iostream> #include <fstream> #include <sstream> #include <vector> using namespace std; using namespace boost::iostreams; template <typename filter_type> string run_filter_1(const string& buffer) { ostringstream result(ios::binary); array_source source(&buffer[0], buffer.size()); filtering_streambuf<input> in; in.push(filter_type()); in.push(source); boost::iostreams::copy(in, result); // not flushing properly in all cases? return result.str(); } template <typename filter_type> string run_filter_2(const string& buffer) { ostringstream result(ios::binary); filtering_ostream fos; fos.push(filter_type()); fos.push(result); fos.write(&buffer[0], buffer.size()); fos.pop(); fos.pop(); // force flush buffer return result.str(); } int main() { // fill buffer with something trivial string buffer(72000, '\0'); for (size_t i=0; i<buffer.size(); i++) buffer[i] = i; string compressed1 = run_filter_1<zlib_compressor>(buffer); string compressed2 = run_filter_2<zlib_compressor>(buffer); cout << "sizes: " << compressed1.size() << " " << compressed2.size() << endl; // same assert(compressed1.size() == compressed2.size()); // read in "bad.bin" into buffer ifstream is("bad.bin", ios::binary); if (!is) { cerr << "bad.bin not found\n"; return 1; } is.read(&buffer[0], buffer.size()); compressed1 = run_filter_1<zlib_compressor>(buffer); compressed2 = run_filter_2<zlib_compressor>(buffer); cout << "sizes: " << compressed1.size() << " " << compressed2.size() << endl; assert(compressed1.size() != compressed2.size()); // different! // decompressing try { // compressed2 is correct string decompressed2 = run_filter_2<zlib_decompressor>(compressed2); cout << "decompressed2.size(): " << decompressed2.size() << endl << flush; assert(decompressed2.size() == buffer.size()); for (size_t i=0; i<buffer.size(); i++) assert(decompressed2[i] == buffer[i]); // throws zlib_error string decompressed1 = run_filter_1<zlib_decompressor>(compressed1); cout << "decompressed1.size(): " << decompressed1.size() << endl << flush; } catch (zlib_error&) { cerr << "caught zlib_error\n"; return 1; } return 0; } IMPORTANT WARNING: This message is intended for the use of the person or entity to which it is addressed and may contain information that is privileged and confidential, the disclosure of which is governed by applicable law. If the reader of this message is not the intended recipient, or the employee or agent responsible for delivering it to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this information is STRICTLY PROHIBITED. If you have received this message in error, please notify us immediately by calling (310) 423-6428 and destroy the related message. Thank You for your cooperation.

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Derivation of binary_oarchive_impl [serialization]
by James Vanns 19 Jun '08

19 Jun '08

Just isn't working in 1.35. With the examples included and following this documentation: http://www.boost.org/doc/libs/1_35_0/libs/serialization/doc/derivation.html I get link errors if I don't include #include <boost/archive/basic_binary_oprimitive.ipp> and compile errors if I do: impl/basic_binary_oprimitive.ipp: In member function ‘virtual int boost::archive::detail::output_streambuf_access<Elem, Tr>::sync()’: impl/basic_binary_oprimitive.ipp:137: error: expected primary-expression before ‘,’ token impl/basic_binary_oprimitive.ipp:137: error: expected primary-expression before ‘>’ token binary_oarchive_impl.hpp:31: instantiated from here class boost::archive::detail::output_streambuf_access<char, std::char_traits<char> >’ has no member named ‘basic_streambuf Am I doing something wrong? The examples don't compile so no wonder mine doesn't! Has anyone got this to work (in Boost 1.35)? I am using g++ 4.1.2 on Linux. My code: // Boost containers, algorithms etc. #include <boost/detail/endian.hpp> #include <boost/archive/binary_oarchive.hpp> // Boost containers, algorithms etc. using boost::archive::save_access; using boost::archive::binary_oarchive_impl; using boost::archive::basic_binary_oarchive; using boost::archive::basic_binary_oprimitive; typedef ostream::char_type ctype; typedef ostream::traits_type ttype; template<class Archive> class binary_net_oarchive : public binary_oarchive_impl<Archive, ctype, ttype> { public: friend class save_access; friend class basic_binary_oarchive<Archive>; friend class binary_oarchive_impl<Archive, ctype, ttype>; friend class basic_binary_oprimitive<Archive, ctype, ttype>; typedef binary_oarchive_impl<Archive, ctype, ttype> base_bin_t; public: binary_net_oarchive(ostream &p_stream) : base_bin_t(p_stream, 0) { } template<class Type> void save(const Type &p_t) { base_bin_t::save(p_t); } }; #include <boost/archive/impl/basic_binary_oarchive.ipp> #include <boost/archive/impl/basic_binary_oprimitive.ipp> #include <boost/archive/impl/archive_pointer_oserializer.ipp> namespace boost { namespace archive { using namespace fq::comms; template class binary_oarchive_impl<base_msg, ctype, ttype>; template class detail::archive_pointer_oserializer<base_msg>; } } #define BOOST_ARCHIVE_CUSTOM_OARCHIVE_TYPES base_msg Regards, Jim -- James Vanns Systems Programmer Framestore CFC Ltd.

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[Test] valgrind complains about uninitialised data
by Jarl Friis 19 Jun '08

19 Jun '08

Hi. I use valgrind 3.2.3. When I run it on even simple Boost.Test unit tests, it complains about use of uninitialised data, the report looks like this: ==11809== Memcheck, a memory error detector. ==11809== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al. ==11809== Using LibVEX rev 1732, a library for dynamic binary translation. ==11809== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP. ==11809== Using valgrind-3.2.3, a dynamic binary instrumentation framework. ==11809== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al. ==11809== For more details, rerun with: -v ==11809== ==11809== Syscall param sigaltstack(ss) points to uninitialised byte(s) ==11809== at 0x8B1D3E7: sigaltstack (in /lib64/libc-2.6.1.so) ==11809== by 0x430CEA: boost::detail::signal_handler::~signal_handler() (execution_monitor.ipp:667) ==11809== by 0x431803: boost::execution_monitor::catch_signals(boost::unit_test::callback0<int> const&) (execution_monitor.ipp:731) ==11809== by 0x432675: boost::execution_monitor::execute(boost::unit_test::callback0<int> const&) (execution_monitor.ipp:1058) ==11809== by 0x40EF61: boost::unit_test::framework::init(boost::unit_test::test_suite* (*)(int, char**), int, char**) (framework.ipp:258) ==11809== by 0x41D740: boost::unit_test::unit_test_main(boost::unit_test::test_suite* (*)(int, char**), int, char**) (unit_test_main.ipp:169) ==11809== by 0x41DA70: main (unit_test_main.ipp:226) ==11809== Address 0x7FEFFEAB0 is on thread 1's stack Running 1 test case... *** No errors detected ==11809== ==11809== ERROR SUMMARY: 8 errors from 1 contexts (suppressed: 3 from 1) ==11809== malloc/free: in use at exit: 0 bytes in 0 blocks. ==11809== malloc/free: 200 allocs, 200 frees, 64,075 bytes allocated. ==11809== For counts of detected errors, rerun with: -v ==11809== All heap blocks were freed -- no leaks are possible. I think if you would add sigstk.ss_sp = 0; sigstk.ss_size = 0; in signal_handler::~signal_handler() It will not complain about this. I know, it should not be necessary, because it is disabling the signal stack, right? Jarl

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[range] begin()/end() for zero terminated strings
by Raider 19 Jun '08

19 Jun '08

Can anyone tell why boost 1.35 dropped support of boost::begin()/end() for zero terminated strings (const char*/wchar_t*)? Raider

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Re: [Boost-users] [Asio] Cannot set port number on endpoint
by Igor R 19 Jun '08

19 Jun '08

> Currently the problem that I have is that I cannot set the port used by the endpoint to the value I want - 10540 - it is always set to 11035. I'm not sure why this is, I cant find the number 11035 anywhere in the code Probably, 11035 is the *local* port - not the port of the endpoint? Can you post short code snippiet where you setup and connect your socket?

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Re: [Boost-users] [program options] failure to link [SOLVED]
by Ovanes Markarian 19 Jun '08

19 Jun '08

Sorry for the double post. I had to patch Source of the Program Options to solve this issue. Here the organization of the project which produced Linking errors: BoostProgramOptions.LIB (we link against DLL version of LIB) ^ | Lib with PO retriever (static lib) ^ | +------------------------------------------------------------+ | | Lib A Lib B ^ ^ | | +------------------------------------------------------------+ ^ | DLL which links with A & B Lib A & Lib B rely on the same program options reader. Initial problem was as described below. To solve this issue I had to remove the arg definition in the value_semantic.cpp file and initialize it in the header file detail/value_semantic.hpp with MS specific __declspec(selectany) which causes to ignore multiple defined linker symbol. Here the linke in the value_semantic.hpp extern BOOST_PROGRAM_OPTIONS_DECL __declspec(selectany) std::string arg("arg"); I hope you can reproduce this behaviour and apply this patch to next boost destributions. With Kind Regards, Ovanes P.S. I don't know if the entire fix is worth doing it when the arg's value is copied in the source anyway. Just a small example: template<class T, class charT> std::string typed_value<T, charT>::name() const { if (!m_default_value.empty() && !m_default_value_as_text.empty()) { return arg + " (=" + m_default_value_as_text + ")"; } else { return arg; } } On Wed, Jun 18, 2008 at 3:47 PM, Ovanes Markarian <om_boost(a)keywallet.com> wrote: > > Hi *! > > We switched the alignment of boost (1.34.0 + VC 7.1) libs to 4 byte, since our project has a restriction of 4byte struct member alignment and we receive a linker error that program_options can no link to a boost::program_options::arg string global. > > error LNK2001: unresolved external symbol "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const boost::program_options::arg" (?arg@program_options@boost@@3V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@B) > > > Making the dumpbin /exports from the boost_program_options....lib I clearly find this symbol as exported one, with the exactly searched signature. Using the default struct member alignment I can link to the program_options lib whithout any problems. Any ideas or suggestions are really welcome! > > > > With Kind Regards, > Ovanes

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Converting an std::string to an int
by Sean Farrow 19 Jun '08

19 Jun '08

Hi: I need to convert and std::string to an int, should I use Lexical_cast or can I just use static_cast? Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 3196 (20080618) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

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Boost Pool - ordered_malloc() problem
by Fitzy 19 Jun '08

19 Jun '08

Hi is there a known problem with boost pool and using ordered_malloc()? I'm creating a pool with chunk size set to 16, and requesting blocks of memory that are multiples of 16, nothing huge(like 3*16), by calling ordered_malloc(n). This works for a few calls but eventually it crashes in simple_segregated_storage.hpp in try_malloc_n() when it calls nextof(iter);. This is using VS2008. Thanks

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[stlport] Cannot Compile "...-p..." library
by kevin＠inesc-macau.org.mo 19 Jun '08

19 Jun '08

Dear All, I am using Boost 1.35.0 library and STLport 5.1.5 with Microsoft Visual C++ 7.1 (SP1). I can build a lot of library but not 'libboost_serialization-vc71-mt-p-1_35.lib' library. I have done the following job: 1) Configure STLport 1.1: Modify "USER_CONFIG.H", enable macro &QUOT;#DEFINE _STLP_DEBUG 1&QUOT; 1.2: Modify "USER_CONFIG.H", enable macro &QUOT;#DEFINE _STLP_USE_BOOST_SUPPORT 1&QUOT;1.3: Modify "HOST.H", enable macro &QUOT;#DEFINE _STLP_USE_DYNAMIC_LIB&QUOT; 2) Compile STLport 2.1: Y:\LIBRARY\STLPORT-5.1.5\BUILD\LIB&GT;/configure -c msvc71 --rtl-dynamic --use-boost Y:\Library\boost_1_35_0/ 2.2: Y:\LIBRARY\STLPORT-5.1.5\BUILD\LIB&GT;/nmake /fmsvc.mak /install/ 3) Build JAM tools 3.1: Y:\LIBRARY\BOOST_1_35_0\TOOLS\JAM\SRC&GT;/build vc7/ 3.2: Copy "BJAM.EXE" into Y:\LIBRARY\BOOST_1_35_0 directory. 4) Modify Boost 4.1: Modify "USER-CONFIG.JAM", enable macro "USING MSVC ;" 4.2: Modify "USER-CONFIG.JAM", enable macro "USING STLPORT : : Y:/LIBRARY/BOOST_1_35_0/STLPORT-5.1.5/STLPORT Y:/LIBRARY/BOOST_1_35_0/STLPORT-5.1.5/LIB ;" 4.3: Copy "USER-CONFIG.JAM" into "Y:\LIBRARY\BOOST_1_35_0" 5) Build Boost 5.1: Y:\LIBRARY\BOOST_1_35_0&GT;/bjam -sTOOLS=vc-7_1-stlport -sSTLPORT_PATH=..\STLport-5.1.5\stlport --toolset=msvc -sstdlib=stlport --build-type=complete -a install/ 6) Finish. It create new directory, which locate in: -- C:\Boost\include\ -- C:\Boost\include\boost-1_35\boost -- C:\Boost\lib Finally, I get many library in C:\Boost\lib such as "libboost_serialization-vc71-mt.lib", but I don't have any "libboost_serialization-vc71-mt-p-1_35.lib". How can I get that ...p... library? Thank you very much. Kevin Tang.

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Re: [Boost-users] convert std::string to std::wstring
by Tan, Tom (Shanghai) 19 Jun '08

19 Jun '08

>I have searched a lot in every place what is the best way to convert a >string to a wstring (and may be vice versa). But til now I don`t got any >results. Can anyone give me an hint what is the best way to do that >(also good performance?)? maybe there is something available to do that? >may be also with some examples. Use member function assign(). Ex. // wstring ->string wstring ws(L"this is a wstring"); string s; s.assign(ws.begin(), ws.end());// now s = "this is a wstring"; // wstring ->string string s("this is a wstring"); wstring ws; ws.assign(s.begin(), s.end());// now ws = L"this is a wstring";

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[range] Trying to make an "is_range" metafunction
by John Moeller 18 Jun '08

18 Jun '08

Hello all, I am trying to make an "is_range" metafunction that (essentially) returns mpl::true_ when the template parameter is a range (as defined by the boost::range library). I can do this if I create a specialization for every "non-range" type currently specialized by the library (such as built-in arrays, char strings, etc.). However, I'd like to have is_range work for a user-defined range without the user *also* needing to specialize is_range. I tried something like this: ////////////////////////////////////////////////////////////////////// BOOST_MPL_HAS_XXX_TRAIT_DEF(type) template < bool B > struct is_range_impl : boost::mpl::false_ {}; template <> struct is_range_impl< true > : boost::mpl::true_ {}; template < typename R > struct is_range : is_range_impl< has_type< boost::range_iterator< R > >::value > {}; ////////////////////////////////////////////////////////////////////// Which does fine if R is a range (even when you use the non-intrinsic method of defining a custom class as a range), but if R is *not* a range, the compiler complains that "iterator" is not a member of the class that I'm passing as the parameter, because it defaults to using the embedded "iterator" type in the parameter. Is there a better way to define is_range so that it will work? I imagine that I'd have to use SFINAE somehow, but I can't quite see how to put it together. Many thanks ahead of time, -- John Moeller

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[program options] failure to link
by Ovanes Markarian 18 Jun '08

18 Jun '08

Hi *! We switched the alignment of boost (1.34.0 + VC 7.1) libs to 4 byte, since our project has a restriction of 4byte struct member alignment and we receive a linker error that program_options can no link to a boost::program_options::arg string global. error LNK2001: unresolved external symbol "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const boost::program_options::arg" (?arg@program_options@boost@@3V?$basic_string@DU?$char_traits@D@std@ @V?$allocator@D@2@@std@@B) Making the dumpbin /exports from the boost_program_options....lib I clearly find this symbol as exported one, with the exactly searched signature. Using the default struct member alignment I can link to the program_options lib whithout any problems. Any ideas or suggestions are really welcome! With Kind Regards, Ovanes

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[program options] failure to link
by Ovanes Markarian 18 Jun '08

18 Jun '08

Hi *! We switched the alignment of boost (1.34.0 + VC 7.1) libs to 4 byte, since our project has a restriction of 4byte struct member alignment and we receive a linker error that program_options can no link to a boost::program_options::arg string global. error LNK2001: unresolved external symbol "class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const boost::program_options::arg" (?arg@program_options@boost@@3V?$basic_string@DU?$char_traits@D@std@ @V?$allocator@D@2@@std@@B) Making the dumpbin /exports from the boost_program_options....lib I clearly find this symbol as exported one, with the exactly searched signature. Using the default struct member alignment I can link to the program_options lib whithout any problems. Any ideas or suggestions are really welcome! With Kind Regards, Ovanes

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Proto transform : fold & fold_tree use case
by Joel Falcou 18 Jun '08

18 Jun '08

Hello, I'm currently trying to write some transforms but I think I horribly fail because I must be missing an important point. Let's say we have a grammar defined as : struct skeleton : or_< terminal< bp::_ > , bitwise_and<skeleton,skeleton> > {}; What I need to do is build a type out of a given expression. This type is in fact a structure containing a tuple of class that represents MPI process. So my idea was to write transform that do the following : * for terminals, extract the argument (which is in fact a functor class) and create a process network class instanciation with the argument and a PID (basically a mpl::long_<>). * for the & operator, transform the left and right argument, and build the tuple out of both results by merging the contents of both into a unique process network. My biggest concern is to have the PID value to be kept across transform call and correctly increased for each terminal. To do so, am I forced to use fold (or fold_tree cause in the real code I have more than the sole & operator) or is there a simple way to say transform left and right and get the resulting types ? Then, how is State kept through fold_tree or transform iteration ? Should I kept the PID current value in an external parameters ? Thanks in advance. PS : if more detailed code is needed, I'll try to see what can be publicly dispatched here.

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Visual C++ 2008 - Regex- Build error (solved)
by Fox Fossati 18 Jun '08

18 Jun '08

Finally i solved my problems, i post the link for other beginners: http://www.codeguru.com/forum/showthread.php?t=455374 Thanks a lot and best regards! ----- Messaggio inoltrato ----- Da: Fox Fossati <stonfofish(a)yahoo.it> A: boost-users(a)lists.boost.org Inviato: Domenica 15 giugno 2008, 21:38:58 Oggetto: Visual C++ 2008 - Regex- Build error After reading the start guide i tryied to install the regex from the command prompt of Visual C++ Express: D:\programmi\boost\boost_1_35_0\libs\regex\build>nmake -fvc8.mak now i have a new vc80 directory an then: D:\programmi\boost\boost_1_35_0\libs\regex\build>nmake -fvc8.mak install with this error: Building Boost.Regex without ICU / Unicode support: Hint: set ICU_PATH on the nmake command line to point to your ICU installation if you have one. copy vc80\libboost_regex-vc80-mt-s-1_35.lib "..\..\VC\lib" Impossibile trovare il percorso specificato. 0 file copiati. NMAKE : fatal error U1077: 'copy' : return code '0x1' Stop. The traduction is: impossible finding the specifiyed directory, 0 files copyed. Have i made a mistake? Thanks and regards! ________________________________ Scopri il Blog di Yahoo! Mail: trucchi, novità, consigli... e la tua opinione! ___________________________________ Scopri il Blog di Yahoo! Mail: trucchi, novità, consigli... e la tua opinione! http://www.ymailblogit.com/blog/

1 0

Interrupting Threads with boost::thread::interrupt()
by Matthias Vallentin 18 Jun '08

18 Jun '08

Hi folks, I am having issues with boost::thread::interrupt(). As far as I understood, calling this function will throw an exception in the corresponding thread. How can deal with blocking functions, such as a calls to accept() or when a thread is waiting on a condition variable to change? Basically the thread blocks somewhere in a while (true) loop. Injecting interruption points manually with boost::this_thread::interruption_point() does not seem to help here either. boost::thread::interrupt() (or interrupt_all in a thread_group), simply does not return. Regards, Matthias -- Matthias Vallentin vallentin(a)icsi.berkeley.edu pgp/gpg: 0x37F34C16

4 4

[ASIO] when does basic_datagram::async_read() call the handler?
by Jose Martinez 18 Jun '08

18 Jun '08

Hello, For the function basic_datagram::async_read() the asio documentation states: "The handler to be called when the receive operation completes." Does that occur when a UDP datagram is received in full or the buffer has filled? I'm just concerned that it might insert into the buffer more than one UDP datagram before calling the handler or a non-complete UDP datagram. I wanted to use the async_read_until but it states that its for streams, which makes sense if the basic_datagram::async_read function returns on a per complete datagram basis. I'm also assuming large UDP datagrams (that take up multiple packets) will be collected by the transport layer before being presented to the application layer (though this is not so much an Asio question as it is a Linux network stack question). thanks a lot! jose "survival first, then happiness as we can manage it"

1 0

please help
by Meththa 17 Jun '08

17 Jun '08

Hi, I've been using the BGL library with Visual C++ to implement the Kamada_Kawai algorithm and have had no errors. I moved this code to g++ and I've had many errors and particularly one that I do not know how to solve. I have a seperate header file that plots the graph as shown below. #include ...<boost/graph/graph_traits.hpp> template<typenameGraph, typenamePositionMap>void... I receive the following error to the location where I typdef the graph_traits. plot.hpp expected initializer before '<' token KK_Algorithm line 26 does anyone know what I need to do to correct this problem. As I mentioned earlier - this worked perfectly with Visual C++. All suggestions are welcome. Thank you.typedefgraph_traits<Graph>::vertex_iterator vi, vi_end;plot(Graph& g, PositionMapposition, std::stringgraph_name) {

3 2

[Graph] Polymorphic properties
by Renaud Detry 17 Jun '08

17 Jun '08

Hi, I have a question related to Boost.Graph bundle properties when there are two distinct vertex/edge types. I would like to implement a network structure using Boost.Graph. In this structure, edges and vertices can be of two types. A vertex can be either of type VA or of type VB, and and edge can be of type EA or EB. The data element to which a vertex/edge is associated differs depending on the vertex/edge type. I will be using the adjacency_list and bundle properties adjacency_list<OutEdgeList, VertexList, Directed, VertexProperties, EdgeProperties, GraphProperties, EdgeList> I'm trying to figure what to use for VertexProperties and EdgesProperties, focusing on maintainability and flexibility. Also, I would like the whole structure to be serializable. This seems like a rather generic problem, yet I wasn't able to find an easy and elegant solution. Here are some ideas for VertexProperties (the same scheme can directly be used for EdgeProperties). 1a.- VertexProperties is set to boost::shared_ptr<VirtualVertexProp>, where VirtualVertexProp is a polymorphic class from which classes specific to types VA or VB can inherit. This approach has some issues though: for example, graph copies have to explicitly handle property clonage. 1b.- Instead of boost::shared_ptr, boost::ptr_array<VirtualVertexProp,1> could be used. The property instances are cloned when the ptr_array is copied. 2.- VertexProperties is a simple class that contains a type enum (VA or VB), and an index that identifies a data element in an external container. There would be two external containers, one containing VA data, the other for VB data. The advantage of (1b) is automatic memory management -- when a vertex is deleted, its properties also die. With (2), properties have to be manually deleted when an vertex is removed. On the other hand, (2) is a bit more simple to serialize, since there's no dynamic allocation (i.e. not on the user side) and no polymorphism (no BOOST_CLASS_EXPORT_GUID...). My questions are: - In (1b), will boost::ptr_array<VirtualVertexProp,1> provide the expected behavior, i.e. that of a clone_ptr? - Am I missing something? Is there a more natural way to solve this problem? Thanks a lot, Renaud.

2 1

Re: [Boost-users] [Spirit-general] Compile errors with Phoenix closures
by Martin Apel 17 Jun '08

17 Jun '08

Joel de Guzman wrote: > Martin Apel wrote: > > >> boost/spirit/phoenix/closures.hpp closure<..>::context() is declared to >> return a reference to a closure_frame_t, which is a closure_frame<self_t>. >> The implementation consists of frame.get(), which invokes the get method >> on holder_t, which is a closure_frame_holder<closure_frame_t>. When >> looking at the get method of closure_frame_holder, it >> returns a reference to frame_ptr, which is a frame_t*, which is not the >> same as an object of type closure_frame<self_t> as declared by >> closure<...>::context() >> > > :-) I think you missed the #ifdef PHOENIX_THREADSAFE branch. > > I don't think so. See the following small test function, which does not do anything sensible, but from my understanding it should at least compile: void test(void) { closure<int> c; closure<int>::closure_frame_t& frame = c.context(); } But it doesn't compile, even with gcc. The error is either (without NDEBUG defined): /scratch/apel/boost_install/linux32/include/boost-1_35/boost/spirit/phoenix/closures.hpp: In member function 'phoenix::closure_frame<phoenix::closure<T0, T1, T2> >& phoenix::closure<T0, T1, T2>::context() [with T0 = int, T1 = phoenix::nil_t, T2 = phoenix::nil_t]': test2.cpp:9: instantiated from here /scratch/apel/boost_install/linux32/include/boost-1_35/boost/spirit/phoenix/closures.hpp:352: error: no match for 'operator!=' in '((phoenix::closure<int, phoenix::nil_t, phoenix::nil_t>*)this)->phoenix::closure<int, phoenix::nil_t, phoenix::nil_t>::frame != 0' test2.cpp:9: instantiated from here /scratch/apel/boost_install/linux32/include/boost-1_35/boost/spirit/phoenix/closures.hpp:352: error: invalid initialization of reference of type 'phoenix::closure_frame<phoenix::closure<int, phoenix::nil_t, phoenix::nil_t> >&' from expression of type 'phoenix::closure_frame<phoenix::closure<int, phoenix::nil_t, phoenix::nil_t> >*' or (with NDEBUG defined): /scratch/apel/boost_install/linux32/include/boost-1_35/boost/spirit/phoenix/closures.hpp: In member function 'phoenix::closure_frame<phoenix::closure<T0, T1, T2> >& phoenix::closure<T0, T1, T2>::context() [with T0 = int, T1 = phoenix::nil_t, T2 = phoenix::nil_t]': test2.cpp:9: instantiated from here /scratch/apel/boost_install/linux32/include/boost-1_35/boost/spirit/phoenix/closures.hpp:352: error: invalid initialization of reference of type 'phoenix::closure_frame<phoenix::closure<int, phoenix::nil_t, phoenix::nil_t> >&' from expression of type 'phoenix::closure_frame<phoenix::closure<int, phoenix::nil_t, phoenix::nil_t> >*' Can you reproduce this? >> Sorry, it wasn't meant as an accusation. >> > > Nah, just kidding. That's why there was a smiley there ;-) > > I had found this out some > >> months ago, so I tried to give an example from my memory. I didn't >> expect Spirit to behave exactly as iostream, because there was no >> specification with respect to numerical accuracy. Additionally I only >> found this out, when setting the precision to 20, 15 is not enough. I >> played around a bit, to find an example: >> > > I'd appreciate it if you can add a bug report to Boost's trac. > Let's see if we can do better. Thanks for reporting this! > > I added a bug report to Trac. It's got the number 2014. Regards, Martin

1 0

Re: [Boost-users] [Spirit-general] Compile errors with Phoenix closures
by Martin Apel 17 Jun '08

17 Jun '08

Joel de Guzman wrote: > Martin Apel wrote: > >> Hi all, >> >> I posted this issue a week ago to the Spirit mailing list only, but I >> got no reply. So I repost this onto the Boost mailing list as well: >> >> I tried to compile a Spirit grammar parsing a real number using closures >> under Microsoft Visual C++ 2005. The same grammar compiles fine on Linux >> using GCC 4.x. Boost version is 1.35.0 in both cases. As far as I >> understood, the error is caused by an assertion inside the closure class >> template: >> closure_frame_t& context() { assert(frame!=0); return >> frame.get(); } (line 352 of >> boost/spirit/phoenix/closures.hpp) >> >> Even if I define NDEBUG, Phoenix closures don't compile, because the >> return statement after the assertion returns a pointer to a >> closure_frame_t and not a reference. From my point of view, this is not >> really a compiler issue, but a bug in the header file >> boost/spirit/phoenix/closures.hpp. I do not understand, why GCC compiles >> this without any errors, because I think the code should not compile at all. >> Any help would be appreciated. >> > > Please post a minimal cpp file that exhibits the problem. > Please try to make it as minimal as possible so as to > focus on the problem. At any rate, have you read the > FAQ: > > http://spirit.sourceforge.net/distrib/spirit_1_8_5/libs/spirit/doc/faq.html… > > Regards, > Hi all, the mentioned FAQ entry is about an assertion triggered at runtime, but I don't even come that far, because the problem happens at compile time. While trying to generate a small example, I found out, what is causing the problem: I marked the grammar class using the closure with __declspec(dllexport), which causes MSVC to instantiate all members of a template, even if they are never needed. It seems that otherwise the "context" member function is never instantiated. If you remove the __declspec(dllexport), everything compiles. I still think, that the code is wrong, because it returns a pointer, where it should return a reference. I have attached a small example, which triggers the problem. By the way, the example implements a real parser, which uses the standard C++ runtime to convert the real number into a double. I had to implement this, because I found out, that the Spirit real_p parser creates numerically different results from the standard runtime, i.e. parsing the string "1.8" delivers a number like 1.8000000532 using Spirit, while the C++ runtime delivers something like 1.7999999973, which is always closer to the real value. Please note, that these numbers are not accurate, they are simply meant to demonstrate, what I mean. Regards, Martin

2 2

Intel TBB & BOOST
by dhruva 17 Jun '08

17 Jun '08

Hi, Just a random thought. Has anyone considered making INTEL TBB part of BOOST? Since I am juggling between the two, I feel they could be under one single umbrella. -dhruva PS: Any TBB users/developers, please comment. -- Contents reflect my personal views only!

3 4

[bind] using NULL as a bound argument
by Marc Horowitz 16 Jun '08

16 Jun '08

I am attempting to use Boost.Bind to create a callable where some of the bound arguments might be NULL. Here is a simple example: void f(const char *) {} int main() { (std::tr1::bind(f, _1))(NULL); return(0); } msvc complains: c:\Program Files\boost\boost_1_35_0\boost/bind.hpp(232) : error C2664: 'void (const char *)' : cannot convert parameter 1 from 'const int' to 'const char *' Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast c:\Program Files\boost\boost_1_35_0\boost/bind/bind_template.hpp(47) : see reference to function template instantiation 'void boost::_bi::list1<A1>::operator ()<void(__cdecl *)(const char *),boost::_bi::list1<const int &>>(boost::_bi::type<T>,F &,A &,int)' being compiled with [ A1=boost::arg<1>, T=void, F=void (__cdecl *)(const char *), A=boost::_bi::list1<const int &> ] foo.cc(20) : see reference to function template instantiation 'void boost::_bi::bind_t<R,F,L>::operator ()<int>(const A1 &)' being compiled with [ R=void, F=void (__cdecl *)(const char *), L=boost::_bi::list1<boost::arg<1>>, A1=int ] g++ complains similarly: /usr/local/boost_1_35_0/boost/bind.hpp: In member function `void boost::_bi::list1<A1>::operator()(boost::_bi::type<void>, F&, A&, int) [with F = void (*)(const char*), A = boost::_bi::list1<const int&>, A1 = boost::arg<1> (*)()]': /usr/local/boost_1_35_0/boost/bind/bind_template.hpp:47: instantiated from `typename boost::_bi::result_traits<R, F>::type boost::_bi::bind_t<R, F, L>::operator()(const A1&) [with A1 = int, R = void, F = void (*)(const char*), L = boost::_bi::list1<boost::arg<1> (*)()>]' foo.cc:20: instantiated from here /usr/local/boost_1_35_0/boost/bind.hpp:232: error: invalid conversion from `const int' to `const char*' Of course, f(NULL) works just fine. The problem seems to be that NULL expands to 0. As a literal constant, this is assignable to any pointer, but once all the template stuff happens, you end up with an expression with integer type, and that's different. Similarly (and more predictably), this fails, too: int z = 0; f(z); I have a workaround, which is to replace the constant NULL with an expression which is assignable to any pointer type. Fortunately, this is easy in C++: class NullPlaceholder { public: template <class T> operator T*() const { return((T*)NULL); } }; NullPlaceholder _NULL; Now, I can write (std::tr1::bind(f, _1))(_NULL); and the compiler is happy. Is there a better workaround for this problem? It seems like wanting to use NULL as a constant would be a pretty common case. Ideally, bind would be fixed so that NULL works, but I'm not sure how to do that without loosening the type checking for all int->pointer conversions. (I played around with trying to use specialization to add some scaffolding so that the A{1,2,3,...} template types for an int 0 literal would actually use a NullPlaceholder, but I didn't get very far, and while this would work for the compilers I use, it would not be formally portable.) A documentation note, at least, would have helped me figure out what was going wrong. Providing _NULL as a "placeholder" in the library would be the next best thing to having NULL work as is. I'm not sure if there are any other common expressions in C++ which will run into similar issues. Integer and string literal constants work just fine, but I may be missing some more subtle case. Marc P.S. It occurs to me that replacing the runtime's NULL with a macro which expanded to a constant of type NullPlaceholder should work perfectly (and does in my tests). Any use of NULL in an expression would dtrt, and optimize to the use of a constant. But overriding the runtime like this just feels sketchy.

4 8

[python] external constructors
by Gennadiy Rozental 16 Jun '08

16 Jun '08

Hi, is there any way to register external constructor for C++ class? Specifically If I have class class A { ... }; I want to register constructor like this: class_<A>(...) .def( "__init__", &make_A ) where make_A is defined something like: void make_A( A&, boost::python::list const& ); Doesn't seem to work like this. Gennadiy

1 0

[Boost.Test] Problem with vc9 runtime library
by Greg Ravikovich 16 Jun '08

16 Jun '08

Hello all. I have the following program: -------------------------- #define BOOST_TEST_MODULE Test #include <boost/test/unit_test.hpp> #include <boost/test/test_case_template.hpp> #include <boost/mpl/list.hpp> typedef boost::mpl::list<float,double> Types; BOOST_AUTO_TEST_CASE_TEMPLATE( my_test, T, Types ) { } -------------------------- The program compiles and links successfully. However, when compiled with Multithreaded Debug Dll runtime library (/MDd) The program reports: Running 2 test cases... *** No errors detected But when compiled with Mulithreaded Debug runtime library (/MTD) The program reports: Running 2 test cases... *** No errors detected Detected memory leaks! Dumping objects -> {94} normal block at 0x00342ED8, 7 bytes long. Data: <double > 64 6F 75 62 6C 65 00 {93} normal block at 0x00342EA0, 8 bytes long. Data: < .4 )4 > D8 2E 34 00 B0 29 34 00 {84} normal block at 0x003429E8, 6 bytes long. Data: <float > 66 6C 6F 61 74 00 {83} normal block at 0x003429B0, 8 bytes long. Data: < )4 > E8 29 34 00 00 00 00 00 Object dump complete. What could cause this? Any suggestions? Greg

4 7

Boost::multi_array and reducing dimensions (part II)
by Joey Mukherjee 16 Jun '08

16 Jun '08

Hello Ronald, I unfortunately was not receiving email when your email came through so I had to start a new thread. Anyway, here is a main program which I hope explains what I am trying to do. I have a stream of numbers and I want to apply a view onto it via the boost::multi_array. I am basically taking a slice of an n- dimensional tensor of data. In my case, I am not currently handling tensors greater than 4. The challenge is that I want to decide at runtime where to slice the array. In my program, this is actually from the GUI. This example code is a fully contained main program which hard codes everything. I hope it makes sense! Thanks for any ideas! Joey #include <iostream> #include <boost/multi_array.hpp> int main (int argc, char **argv) { int ret_val; typedef boost::multi_array_types::index_range range; // Hard coded values - this is a 4x3x3 matrix // In my real program, I read this in from data int vals [] = {0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3}; boost::array <int, 3> sizes = { { 4, 3, 3 } }; int size = 3; // three dimensional matrix // I want to get to get the second X, all the Y's, and the third Z // The -1 could be along any axis, but for now, hard coded to Y int desired_slice [] = {1, -1, 2}; // how to reduce to 1D view int whichPosition = 2; // where in the 1D that I wish to print... // Based on the dimensionality of my array which is known from the data... // Pick out which slice is being requested switch (size) { case 0 : ret_val = vals [0]; break; case 1 : { // one-d array ret_val = (vals [whichPosition]); } break; // Now we get into slices, find the slice element that has -1, and create a slice along that dimension case 2 : { // two-dimensional array typedef boost::const_multi_array_ref <int, 2> array_type; array_type::index_gen indices; array_type multi_array (&(vals [0]), sizes); /* This doesn't work, but I would love a generic version of this: array_type::const_array_view <1>::type OneDView; if (desired_slice [0] == -1) OneDView = (multi_array [indices [range ()][desired_slice [1]]]); else if (desired_slice [1] == -1) OneDView = (multi_array [indices [desired_slice [0][range ()]]]); ret_val = (OneDView [whichPosition]); */ } break; case 3 : { // three-dimensional array typedef boost::const_multi_array_ref <int, 3> array_type::index_gen indices; // Hard coded range () means we are always slicing along Z array_type multi_array (&(vals [0]), sizes); array_type::const_array_view <1>::type OneDView = multi_array [indices [desired_slice [0]][desired_slice [1]] [range ()]]; ret_val = (OneDView [whichPosition]); } break; case 4 : { // four-dimensional array typedef boost::const_multi_array_ref <int, 4> array_type; array_type::index_gen indices; array_type multi_array (&(vals [0]), sizes); array_type::const_array_view <1>::type OneDView = multi_array [indices [desired_slice [0]][desired_slice [1]] [desired_slice[2]][range ()]]; ret_val = (OneDView [whichPosition]); } break; default : assert (size < 4); // would like to handle n- dimensional case, but how? } // switch std::cout << ret_val << std::endl; }

1 0

[TIMER] Always getting time elapsed == 0
by clemix 16 Jun '08

16 Jun '08

Hi, boost: 1.35 gcc: gcc (GCC) 4.2.3 (Ubuntu 4.2.3-2ubuntu7) source: timer.cpp ================= #include <boost/progress.hpp> int main() { boost::progress_timer t; // start timing usleep(5000000); // do something ... return 0; } compile: ======== g++ timer.cpp -o timer -I /opt/boost/include/boost-1_35/ run: ==== ./timer 0.00 s <--- This is always 0 but has to be 5.xxxxx Can someone help me? Or is it my gcc version? Or is there an other nice to use os independent timer in boost? thx clemix

2 1

Is there any existing dynamic library related library development plans?
by Lian Cheng 16 Jun '08

16 Jun '08

Hi, all Dynamic library is really a daily used tools for plugin based frameworks. And I would like to know is there such a library or library development plan that deals with both Microsoft .dll and Linux .so ? Cheers Cheng.

7 6

Building boost for VS2005 SP1 & VS 2008
by Ambardekar, Mukund 16 Jun '08

16 Jun '08

Hi, I would like to build boost library in 2 configurations (as mentioned below) for my project. 1. Visual Studio 2005 SP1 2. Visual Studio 2008 Also I want to use is on 32bit windows XP and also on 64 bit. So I guess I need it with above 2 configurations (VS2005 SP1 & 2008) both on 32 bit and 64 bit machine. Please confirm. I am using below version - Version 1.35.0 Boost Jam 3.1.16 I am following below steps to build on VS 2005 - * Unzip "boost-jam-3.1.16.zip" and run "build.bat" - As a result "bjam.exe" is created in folder "boost-jam-3.1.16\bin.ntx86" * Unzip "boost_1_35_0.zip" in say "C:\Boost" folder * Copy "bjam.exe" to "C:\Boost\boost_1_35_0" path * Go to command prompt and make current directory as "C:\Boost\boost_1_35_0" * Run the command below (For Microsoft Visual C++ command-line tools from Visual Studio .NET 2005) to build boost bjam "-sTOOLS=vc-8_0" install Regards, Mukund

3 2

Visual Studio 2008 linking problem
by Ondrej Kuncar 16 Jun '08

16 Jun '08

Hello! I've built the boost library by Visual Studio 2008 Express with these parameters: debug threading=multi link=static runtime-link=shared --toolset="msvc-9.0" install Unfortunately I got the following linker errors during building my application: libboost_program_options-vc90-mt-gd-1_35.lib(convert.obj) : warning LNK4217: locally defined symbol ?_Register@facet@locale@std@@QAEXXZ (public: void __thiscall std::locale::facet::_Register(void)) imported in function "class std::codecvt<wchar_t,char,int> const & __cdecl std::use_facet<class std::codecvt<wchar_t,char,int> >(class std::locale const &)" (??$use_facet@V?$codecvt@_WDH@std@@@std@@YAABV?$codecvt@_WDH@0@ABVlocale@0@@Z) libboost_program_options-vc90-mt-gd-1_35.lib(cmdline.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::_Container_base::_Orphan_all(void)const " (__imp_?_Orphan_all@_Container_base@std@@QBEXXZ) libboost_regex-vc90-mt-gd-1_35.lib(instances.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::_Container_base::_Orphan_all(void)const " (__imp_?_Orphan_all@_Container_base@std@@QBEXXZ) referenced in function "public: class std::vector<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > > & __thiscall std::vector<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > >::operator=(class std::vector<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > > const &)" (??4?$vector@U?$sub_match@PBD@boost@@V?$allocator@U?$sub_match@PBD@boost@@@std@@@std@@QAEAAV01@ABV01@@Z) libboost_program_options-vc90-mt-gd-1_35.lib(options_description.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::_Container_base::_Orphan_all(void)const " (__imp_?_Orphan_all@_Container_base@std@@QBEXXZ) libboost_program_options-vc90-mt-gd-1_35.lib(value_semantic.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::_Container_base::_Orphan_all(void)const " (__imp_?_Orphan_all@_Container_base@std@@QBEXXZ) libboost_program_options-vc90-mt-gd-1_35.lib(positional_options.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::_Container_base::_Orphan_all(void)const " (__imp_?_Orphan_all@_Container_base@std@@QBEXXZ) libboost_program_options-vc90-mt-gd-1_35.lib(positional_options.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::~_Container_base(void)" (__imp_??1_Container_base@std@@QAE@XZ) libboost_program_options-vc90-mt-gd-1_35.lib(cmdline.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::~_Container_base(void)" (__imp_??1_Container_base@std@@QAE@XZ) libboost_regex-vc90-mt-gd-1_35.lib(instances.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::~_Container_base(void)" (__imp_??1_Container_base@std@@QAE@XZ) referenced in function "public: __thiscall std::_Vector_val<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > >::~_Vector_val<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > >(void)" (??1?$_Vector_val@U?$sub_match@PBD@boost@@V?$allocator@U?$sub_match@PBD@boost@@@std@@@std@@QAE@XZ) libboost_program_options-vc90-mt-gd-1_35.lib(options_description.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::~_Container_base(void)" (__imp_??1_Container_base@std@@QAE@XZ) libboost_program_options-vc90-mt-gd-1_35.lib(value_semantic.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::~_Container_base(void)" (__imp_??1_Container_base@std@@QAE@XZ) libboost_program_options-vc90-mt-gd-1_35.lib(variables_map.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::~_Container_base(void)" (__imp_??1_Container_base@std@@QAE@XZ) libboost_program_options-vc90-mt-gd-1_35.lib(positional_options.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::_Container_base(void)" (__imp_??0_Container_base@std@@QAE@XZ) libboost_program_options-vc90-mt-gd-1_35.lib(cmdline.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::_Container_base(void)" (__imp_??0_Container_base@std@@QAE@XZ) libboost_regex-vc90-mt-gd-1_35.lib(instances.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::_Container_base(void)" (__imp_??0_Container_base@std@@QAE@XZ) referenced in function "protected: __thiscall std::_Vector_val<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > >::_Vector_val<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > >(class std::allocator<struct boost::sub_match<char const *> >)" (??0?$_Vector_val@U?$sub_match@PBD@boost@@V?$allocator@U?$sub_match@PBD@boost@@@std@@@std@@IAE@V?$allocator@U?$sub_match@PBD@boost@@@1@@Z) libboost_program_options-vc90-mt-gd-1_35.lib(options_description.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::_Container_base(void)" (__imp_??0_Container_base@std@@QAE@XZ) libboost_program_options-vc90-mt-gd-1_35.lib(value_semantic.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::_Container_base(void)" (__imp_??0_Container_base@std@@QAE@XZ) libboost_program_options-vc90-mt-gd-1_35.lib(variables_map.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall std::_Container_base::_Container_base(void)" (__imp_??0_Container_base@std@@QAE@XZ) libboost_regex-vc90-mt-gd-1_35.lib(instances.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall std::_Container_base::_Swap_all(class std::_Container_base &)const " (__imp_?_Swap_all@_Container_base@std@@QBEXAAV12@@Z) referenced in function "public: void __thiscall std::vector<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > >::swap(class std::vector<struct boost::sub_match<char const *>,class std::allocator<struct boost::sub_match<char const *> > > &)" (?swap@?$vector@U?$sub_match@PBD@boost@@V?$allocator@U?$sub_match@PBD@boost@@@std@@@std@@QAEXAAV12@@Z) libboost_regex-vc90-mt-gd-1_35.lib(instances.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: class std::_String_iterator<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::insert(class std::_String_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,char)" (__imp_?insert@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE?AV?$_String_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@2@V32@D@Z) referenced in function "public: struct boost::re_detail::re_syntax_base * __thiscall boost::re_detail::basic_regex_creator<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >::append_set(class boost::re_detail::basic_char_set<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > > const &,struct boost::mpl::bool_<0> *)" (?append_set@?$basic_regex_creator@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@re_detail@boost@@QAEPAUre_syntax_base@23@ABV?$basic_char_set@DU?$regex_traits@DV?$w32_regex_traits@D@boost@@@boost@@@23@PAU?$bool_@$0A@@mpl@3@@Z) libboost_program_options-vc90-mt-gd-1_35.lib(value_semantic.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > & __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::replace(class std::_String_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::_String_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (__imp_?replace@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV12@V?$_String_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@2@0ABV12@@Z) referenced in function "public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > & __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::_Replace<char *>(class std::_String_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::_String_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,char *,char *,struct std::input_iterator_tag)" (??$_Replace@PAD@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV01@V?$_String_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@1@0PAD1Uinput_iterator_tag@1@@Z) libboost_program_options-vc90-mt-gd-1_35.lib(convert.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > & __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::replace(class std::_String_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::_String_iterator<char,struct std::char_traits<char>,class std::allocator<char> >,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (__imp_?replace@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV12@V?$_String_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@2@0ABV12@@Z) libboost_program_options-vc90-mt-gd-1_35.lib(cmdline.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: class std::_String_iterator<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::erase(class std::_String_iterator<char,struct std::char_traits<char>,class std::allocator<char> >)" (__imp_?erase@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE?AV?$_String_iterator@DU?$char_traits@D@std@@V?$allocator@D@2@@2@V32@@Z) referenced in function "public: class std::vector<class boost::program_options::basic_option<char>,class std::allocator<class boost::program_options::basic_option<char> > > __thiscall boost::program_options::detail::cmdline::parse_short_option(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> > > > &)" (?parse_short_option@cmdline@detail@program_options@boost@@QAE?AV?$vector@V?$basic_option@D@program_options@boost@@V?$allocator@V?$basic_option@D@program_options@boost@@@std@@@std@@AAV?$vector@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$allocator@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@2@@6@@Z) libboost_program_options-vc90-mt-gd-1_35.lib(convert.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: static unsigned int __cdecl std::codecvt<wchar_t,char,int>::_Getcat(class std::locale::facet const * *)" (__imp_?_Getcat@?$codecvt@_WDH@std@@SAIPAPBVfacet@locale@2@@Z) referenced in function "class std::codecvt<wchar_t,char,int> const & __cdecl std::use_facet<class std::codecvt<wchar_t,char,int> >(class std::locale const &)" (??$use_facet@V?$codecvt@_WDH@std@@@std@@YAABV?$codecvt@_WDH@0@ABVlocale@0@@Z) libboost_program_options-vc90-mt-gd-1_35.lib(convert.obj) : error LNK2019: unresolved external symbol "__declspec(dllimport) public: class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > & __thiscall std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> >::replace(class std::_String_iterator<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> >,class std::_String_iterator<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> >,class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > const &)" (__imp_?replace@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV12@V?$_String_iterator@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@2@0ABV12@@Z) referenced in function "public: class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > & __thiscall std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> >::_Replace<wchar_t *>(class std::_String_iterator<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> >,class std::_String_iterator<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> >,wchar_t *,wchar_t *,struct std::input_iterator_tag)" (??$_Replace@PA_W@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV01@V?$_String_iterator@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@1@0PA_W1Uinput_iterator_tag@1@@Z) I downloaded compiled libraries from boost-consulting and it works with them. Any idea where is the problem? Thanks, Ondrej Kuncar

2 1

Re: [Boost-users] interprocess object in memory
by Jan Suchý 16 Jun '08

16 Jun '08

Hi Ion, sorry not to get back sooner - I've been on vacation... It is not good, that it is not possible to do it this way. I will try to ask the XQilla developer if it would be possible to change the source code for not using raw pointers. But I do not see it well.. Is it hard to change this in project such a xqilla is (it calls xerces libraries and xercess calls icu...)? What is your experience? Do you see some other solution how to use C++ object from more instancess of program when not used interprocess library? Thank you for your advice. Have a nice day, Jan Suchy Jan Such? wrote: > Hallo boost interprocess useres, > first of all, many thanks to Ion for his support: > std::auto_ptr<managed_shared_memory> segment_ptr is working well and choosing keytype as interprocess::basic_string is working great too. Thank you. > > But now, I have stoppend when using map in shared memory in combination: > > typedef std::pair<MyString, XQQuery*> ValueType; You can't store raw pointers in shared memory. And since XQQuery does not seem to be prepared for shared memory, you can't place XQQuery objects in shared memory. I'm afraid there's no solution to your problem using Interprocess :-( Regards, Ion

2 1

Re: [Boost-users] ublas: problem with having T& as reference type of matrix<T, L, DiskStorage>
by Maarten Nieber 16 Jun '08

16 Jun '08

Hi Niels, thanks for your reply :-) By now, I realise that what I'm trying to do is to use a "smart reference" instead of a normal reference. This is "forbidden" in the boost Ublas documentation. On the other hand, the smart reference type I created seems to work fine for my application. If we could use the reference type of the StorageType as the reference type of the matrix class (see below), then at least it would be possible to use the smart reference in cases where it does work. In answer to your question, yes I would like to replace (in matrix.hpp) typedef const T &const_reference; typedef T &reference; with typedef typename A::const_reference const_reference; typedef typename A::reference reference; When I locally made the changes in matrix.hpp, so far it seems to work. Best regards, Maarten

1 0

My troubles when compiling without link=static. (with msvc-8.0)
by Guido Ziliotti 16 Jun '08

16 Jun '08

My building platform : using msvc : 8.0 ; I have attached som attempt in compiling some boost examples. Notice I have set C:\Boost\lib in my LIB environment variable (set LIB=%LIB%;c:\Boost\lib ) log => command line | direcorty file_size.log => bjam file_size | BOOST_ROOT\libs\filesystem\example simple_ls.log => bjam file_size | BOOST_ROOT\libs\filesystem\example first.log => bjam first | BOOST_ROOT\libs\program_options\example minmax_timer.log => bjam minmax_timer | BOOST_ROOT\libs\algorithm\minmax file_size, simple_ls and first all work fine when adding the magic option link=static. bjam minmax_timer does not work both with and wothout link=static, instead minmax_ex works fine with and without link=static, that's why I have not listed it in my trouble list of course. I would appreciate any help in solving any of my troubles. Notice I have compiled boost with bjam --build-type=complete install Onestly I am a bit pessimistic. Still I hope I am missing something obvious. I can't see why link=static works so fine while without link=static all this troubles arise.

1 0

Re: [Boost-users] Error when using the split algorithm
by Tan, Tom (Shanghai) 16 Jun '08

16 Jun '08

>I have the following line of code: > boost::algorithm::split(SplitString, temp, "-"); I get the following error when trying >to compile using visual c++ 2005: >error C2064: term does not evaluate to a function taking 1 arguments finder.hpp 583 >Can anyone tell me what I have done wrong here. You should be using boost::algorithm::split(SplitString, temp, is_any_of("-")); the 3rd parameter should be a predicate functor not string. You need to include <boost/algorithm/string/predicate.hpp> to use the predefined functor is_any_of(). Hope it helps. Tom

2 1

Re: [Boost-users] [Boost.Test] Problem with vc9 runtime
by Tan, Tom (Shanghai) 16 Jun '08

16 Jun '08

Greg Ravikovich <grisharav <at> gmail.com> writes: > > > Any workarounds? I see leaks report from Vc9 too, but since I am using Visual Leak Detector(http://dmoulding.googlepages.com/vld) at the same time and it reports no leak. I just ignore the Vc9 warning. I trust VLD because, in a previous release of Boost(1.34?), VC8 reported a leak in boost.thread, which actually was not(the memory was dynamically allocated and not reclaimed intentionally, but not increasing throughout the lifetime, thus not leaking ). Anyway, the author of boost.thread later patched the code to removed the warning. Since the boost.thread was re-written by another writer in 1.35, I amsuspecting this is the same case as before. However, I have no time to check it. Did you use boost.thread in your code?

1 0

Visual C++ 2008 - Regex- Build error
by Fox Fossati 15 Jun '08

15 Jun '08

After reading the start guide i tryied to install the regex from the command prompt of Visual C++ Express: D:\programmi\boost\boost_1_35_0\libs\regex\build>nmake -fvc8.mak now i have a new vc80 directory an then: D:\programmi\boost\boost_1_35_0\libs\regex\build>nmake -fvc8.mak install with this error: Building Boost.Regex without ICU / Unicode support: Hint: set ICU_PATH on the nmake command line to point to your ICU installation if you have one. copy vc80\libboost_regex-vc80-mt-s-1_35.lib "..\..\VC\lib" Impossibile trovare il percorso specificato. 0 file copiati. NMAKE : fatal error U1077: 'copy' : return code '0x1' Stop. The traduction is: impossible finding the specifiyed directory, 0 files copyed. Have i made a mistake? Thanks and regards! ___________________________________ Scopri il Blog di Yahoo! Mail: trucchi, novità, consigli... e la tua opinione! http://www.ymailblogit.com/blog/

1 0

Re: [Boost-users] [boost.thread] thread safe circular_buffer implementation
by Igor R 15 Jun '08

15 Jun '08

> But I can't say the same things for non-const function which returns reference. <...> And also iterators are same as the index operator, not thread safe. It seems that the only way to use such a container in the thread-safe manner, is to perform all the necessary locking at some higher-level of your design. Besides the problem you mentioned, you've got another issue: usually you wish to get not just "physical" thread-safety (meaning that your container remains in a consistent state), but a "logical" one. Consider the following code: if (myVector_.size()) { Element element = myVector_[0]; } It doens't make sense that size() and operator[]() themselves are "thread-safe", as between these calls the size might change. This means that the user of your container has to lock it anyway. If so, your internal locking appears to be useless overhead.

1 0

Error when using the split algorithm
by Sean Farrow 15 Jun '08

15 Jun '08

Hi: I have the following line of code: boost::algorithm::split(SplitString, temp, "-"); I get the following error when trying to compile using visual c++ 2005: error C2064: term does not evaluate to a function taking 1 arguments finder.hpp 583 Can anyone tell me what I have done wrong here. Any help apreciated. Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 3187 (20080615) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

1 0

Boost spirit
by Reena Dass 15 Jun '08

15 Jun '08

I'm using boost spirit to create a URI parser. I get a syntax error for the following when I use the grammar straight off from RFC 2396. server = [[userinfo >> ch_p('@')] hostport] ; And when I change the rule and compile it, then the syntax error goes away but I get the following error. I've enclosed Grammar.h for reference Thanks, Reena d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/scanner/scanner.hpp(146) : error C2064: term does not evaluate to a function taking 2 arguments d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/scanner/scanner.hpp(161) : see reference to function template instantiation 'void boost::spirit::attributed_action_policy<boost::spirit::nil_t>::call<Acto rT,IteratorT>(const ActorT &,boost::spirit::nil_t,const IteratorT &,const IteratorT &)' being compiled with [ ActorT=boost::spirit::sequence<boost::spirit::chlit<char>,boost::spirit: :rule<scanner_t>>, IteratorT=iterator_t ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/composite/actions.hpp(109) : see reference to function template instantiation 'void boost::spirit::action_policy::do_action<ActionT,boost::spirit::match<boo st::spirit::nil_t>::return_t,iterator_t>(const ActorT &,AttrT &,const IteratorT &,const IteratorT &) const' being compiled with [ ActionT=boost::spirit::sequence<boost::spirit::chlit<char>,boost::spirit ::rule<scanner_t>>, ActorT=boost::spirit::sequence<boost::spirit::chlit<char>,boost::spirit: :rule<scanner_t>>, AttrT=boost::spirit::match<boost::spirit::nil_t>::return_t, IteratorT=iterator_t ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/non_terminal/impl/rule.ipp(233) : see reference to function template instantiation 'boost::spirit::match<boost::spirit::nil_t> boost::spirit::action<ParserT,ActionT>::parse<ScannerT>(const ScannerT &) const' being compiled with [ ParserT=boost::spirit::rule<scanner_t>, ActionT=boost::spirit::sequence<boost::spirit::chlit<char>,boost::spirit ::rule<scanner_t>>, ScannerT=boost::spirit::scanner<const char *,boost::spirit::scanner_policies_t> ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/non_terminal/impl/rule.ipp(232) : while compiling class template member function 'boost::spirit::match<boost::spirit::nil_t> boost::spirit::impl::concrete_parser<ParserT,ScannerT,AttrT>::do_parse_v irtual(const ScannerT &) const' with [ ParserT=boost::spirit::action<boost::spirit::rule<scanner_t>,boost::spir it::sequence<boost::spirit::chlit<char>,boost::spirit::rule<scanner_t>>> , ScannerT=boost::spirit::scanner<const char *,boost::spirit::scanner_policies_t>, AttrT=boost::spirit::nil_t ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/non_terminal/rule.hpp(135) : see reference to class template instantiation 'boost::spirit::impl::concrete_parser<ParserT,ScannerT,AttrT>' being compiled with [ ParserT=boost::spirit::action<boost::spirit::rule<scanner_t>,boost::spir it::sequence<boost::spirit::chlit<char>,boost::spirit::rule<scanner_t>>> , ScannerT=boost::spirit::scanner<const char *,boost::spirit::scanner_policies_t>, AttrT=boost::spirit::nil_t ] d:\work\mainline\generation_3\sources_rdo\urilib\Grammar.h(60) : see reference to function template instantiation 'boost::spirit::rule<T0> &boost::spirit::rule<T0>::operator =<boost::spirit::action<ParserT,ActionT>>(const boost::spirit::action<ParserT,ActionT> &)' being compiled with [ T0=scanner_t, ParserT=boost::spirit::rule<scanner_t>, ActionT=boost::spirit::sequence<boost::spirit::chlit<char>,boost::spirit ::rule<scanner_t>> ] d:\work\mainline\generation_3\sources_rdo\urilib\Grammar.h(29) : while compiling class template member function 'urilib::Grammar::definition<ScannerT>::definition(const urilib::Grammar &)' with [ ScannerT=scanner_t ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/non_terminal/impl/grammar.ipp(262) : see reference to class template instantiation 'urilib::Grammar::definition<ScannerT>' being compiled with [ ScannerT=scanner_t ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/non_terminal/impl/grammar.ipp(281) : see reference to function template instantiation 'void boost::spirit::impl::call_helper<0>::do_<result_t,definition_t,ScannerT> (RT &,DefinitionT &,const ScannerT &)' being compiled with [ ScannerT=scanner_t, RT=result_t, DefinitionT=definition_t ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/non_terminal/grammar.hpp(53) : see reference to function template instantiation 'boost::spirit::match<boost::spirit::nil_t> boost::spirit::impl::grammar_parser_parse<0,urilib::Grammar,boost::spiri t::parser_context<>,ScannerT>(const boost::spirit::grammar<DerivedT> *,const ScannerT &)' being compiled with [ ScannerT=scanner_t, DerivedT=urilib::Grammar ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/non_terminal/grammar.hpp(63) : see reference to function template instantiation 'boost::spirit::match<boost::spirit::nil_t> boost::spirit::grammar<DerivedT>::parse_main<ScannerT>(const ScannerT &) const' being compiled with [ DerivedT=urilib::Grammar, ScannerT=scanner_t ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/scanner/impl/skipper.ipp(131) : see reference to function template instantiation 'boost::spirit::match<boost::spirit::nil_t> boost::spirit::grammar<DerivedT>::parse<scanner_t>(const ScannerT &) const' being compiled with [ DerivedT=urilib::Grammar, ScannerT=scanner_t ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/scanner/impl/skipper.ipp(153) : see reference to function template instantiation 'boost::spirit::parse_info<> boost::spirit::impl::phrase_parser<boost::spirit::space_parser>::parse<I teratorT,DerivedT>(const IteratorT &,const IteratorT &,const ParserT &,const boost::spirit::space_parser &)' being compiled with [ IteratorT=const char *, DerivedT=urilib::Grammar, ParserT=urilib::Grammar ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/scanner/impl/skipper.ipp(171) : see reference to function template instantiation 'boost::spirit::parse_info<> boost::spirit::parse<const CharT*,DerivedT,boost::spirit::space_parser>(const IteratorT &,const IteratorT &,const boost::spirit::parser<DerivedT> &,const boost::spirit::parser<boost::spirit::space_parser> &)' being compiled with [ CharT=char, DerivedT=urilib::Grammar, IteratorT=const char * ] .\URI.cpp(23) : see reference to function template instantiation 'boost::spirit::parse_info<> boost::spirit::parse<char,DerivedT,boost::spirit::space_parser>(const CharT *,const boost::spirit::parser<DerivedT> &,const boost::spirit::parser<boost::spirit::space_parser> &)' being compiled with [ DerivedT=urilib::Grammar, CharT=char ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/scanner/scanner.hpp(146) : error C2064: term does not evaluate to a function taking 2 arguments d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/scanner/scanner.hpp(161) : see reference to function template instantiation 'void boost::spirit::attributed_action_policy<boost::spirit::nil_t>::call<Acto rT,IteratorT>(const ActorT &,boost::spirit::nil_t,const IteratorT &,const IteratorT &)' being compiled with [ ActorT=boost::spirit::rule<scanner_t>, IteratorT=iterator_t ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/composite/actions.hpp(109) : see reference to function template instantiation 'void boost::spirit::action_policy::do_action<ActionT,boost::spirit::match<boo st::spirit::nil_t>::return_t,iterator_t>(const ActorT &,AttrT &,const IteratorT &,const IteratorT &) const' being compiled with [ ActionT=boost::spirit::rule<scanner_t>, ActorT=boost::spirit::rule<scanner_t>, AttrT=boost::spirit::match<boost::spirit::nil_t>::return_t, IteratorT=iterator_t ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/non_terminal/impl/rule.ipp(233) : see reference to function template instantiation 'boost::spirit::match<boost::spirit::nil_t> boost::spirit::action<ParserT,ActionT>::parse<ScannerT>(const ScannerT &) const' being compiled with [ ParserT=boost::spirit::rule<scanner_t>, ActionT=boost::spirit::rule<scanner_t>, ScannerT=boost::spirit::scanner<const char *,boost::spirit::scanner_policies_t> ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/non_terminal/impl/rule.ipp(232) : while compiling class template member function 'boost::spirit::match<boost::spirit::nil_t> boost::spirit::impl::concrete_parser<ParserT,ScannerT,AttrT>::do_parse_v irtual(const ScannerT &) const' with [ ParserT=boost::spirit::action<boost::spirit::rule<scanner_t>,boost::spir it::rule<scanner_t>>, ScannerT=boost::spirit::scanner<const char *,boost::spirit::scanner_policies_t>, AttrT=boost::spirit::nil_t ] d:\Work\Mainline\Generation_3\root\usr\include\NTx86debug\boost/spirit/c ore/non_terminal/rule.hpp(135) : see reference to class template instantiation 'boost::spirit::impl::concrete_parser<ParserT,ScannerT,AttrT>' being compiled with [ ParserT=boost::spirit::action<boost::spirit::rule<scanner_t>,boost::spir it::rule<scanner_t>>, ScannerT=boost::spirit::scanner<const char *,boost::spirit::scanner_policies_t>, AttrT=boost::spirit::nil_t ] d:\work\mainline\generation_3\sources_rdo\urilib\Grammar.h(68) : see reference to function template instantiation 'boost::spirit::rule<T0> &boost::spirit::rule<T0>::operator =<boost::spirit::action<ParserT,ActionT>>(const boost::spirit::action<ParserT,ActionT> &)' being compiled with [ T0=scanner_t, ParserT=boost::spirit::rule<scanner_t>, ActionT=boost::spirit::rule<scanner_t> ]

2 1

[boost.thread] thread safe circular_buffer implementation
by Selçuk Giray Özdamar 15 Jun '08

15 Jun '08

Hello, I wrote my template based CircularBuffer class. Here the primary aim is to make everything thread safe. Multiple concurrent reads are possible, but only exclusive write is possible. Here we have index operator overloaded. As usual index operator has 2 versions, const and non-const versions. T& operator [] (unsigned index); // return as reference T operator [] (unsigned index) const; // return by value In contrast, standart library container classes return by const reference in const methods. Here I'm returning by value. Below you can see my complete implementation. There may be possible potential risks here. For example, in overloaded index operator (const function) it returns by value, so read lock assures it's safety. But I can't say the same things for non-const function which returns reference. If you write something like this: T& _refT = mCircularBuffer[0]; It returns as reference, and some other time you are free to change the value of _refT (after leaving the index operator scope). So write lock is unlocked, and as a consequence it's not thread safe so. And also iterators are same as the index operator, not thread safe. I'm looking for much safer implementation. Thanks, regards... template <class T> class CircularBuffer { typedef boost::shared_mutex ReadWriteMutex; typedef boost::shared_lock<boost::shared_mutex> ReadLock; typedef boost::unique_lock<boost::shared_mutex> WriteLock; public: typedef typename boost::circular_buffer<T>::const_iterator const_iterator; typedef typename boost::circular_buffer<T>::iterator iterator; explicit CircularBuffer(unsigned capacity = 10) : m_capacity(capacity) , m_buffer(capacity) { } ~CircularBuffer() { } CircularBuffer(const CircularBuffer& other) : m_capacity(other.m_capacity) , m_buffer(other.m_buffer) { } CircularBuffer& operator= (const CircularBuffer& other) { CircularBuffer temp(other); WriteLock w_lock(rw_mutex); using std::swap; swap(m_capacity, temp.m_capacity); swap(m_buffer, temp.m_buffer); return *this; } iterator begin() { WriteLock w_lock(rw_mutex); return m_buffer.begin(); } iterator end() { WriteLock w_lock(rw_mutex); return m_buffer.end(); } const_iterator begin() const { ReadLock r_lock(rw_mutex); return m_buffer.begin(); } const_iterator end() const { ReadLock r_lock(rw_mutex); return m_buffer.end(); } T& operator [] (unsigned index) { WriteLock w_lock(rw_mutex); return m_buffer[index]; } T operator [] (unsigned index) const { ReadLock r_lock(rw_mutex); return m_buffer[index]; } T& at(unsigned index) { WriteLock w_lock(rw_mutex); return m_buffer.at(index); } T at(unsigned index) const { ReadLock r_lock(rw_mutex); return m_buffer.at(index); } T& front() { WriteLock w_lock(rw_mutex); return m_buffer.front(); } T& back() { WriteLock w_lock(rw_mutex); return m_buffer.back(); } T front() const { ReadLock r_lock(rw_mutex); return m_buffer.front(); } T back() const { ReadLock r_lock(rw_mutex); return m_buffer.back(); } size_t size() const { ReadLock r_lock(rw_mutex); return m_buffer.size(); } bool empty() const { ReadLock r_lock(rw_mutex); return m_buffer.empty(); } bool full() const { ReadLock r_lock(rw_mutex); return m_buffer.full(); } size_t capacity() const { ReadLock r_lock(rw_mutex); return m_buffer.capacity(); } void push_back(const T& item = T()) { WriteLock w_lock(rw_mutex); m_buffer.push_back(item); } void clear() { WriteLock w_lock(rw_mutex); m_buffer.clear(); } private: unsigned m_capacity; boost::circular_buffer<T> m_buffer; // rw_mutex for internal buffer mutable ReadWriteMutex rw_mutex; };

1 0

is it possible to initialize thread local storage automatically?
by Frank Birbacher 14 Jun '08

14 Jun '08

Hi! I'm looking for a method to execute some code for each thread starting. It suffices to run that code for each boost::thread. I want to initialize some thread local storage for each thread automatically. The creating(!) thread shall supply an initial value and the created(!) thread shall receive this value, essentially a copy of some thread local variable. That is the new thread shall create a copy of the same variable which the creating thread has. Is that possible using boost::thread? I hope my explaination is clear enough. Frank

2 2

Boost string algorithms split function
by Sean Farrow 14 Jun '08

14 Jun '08

Hi: I am using the split function in the boost string algorithms library. Can I use a vector of char, or do I have to use a vector of std::string. Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 3186 (20080613) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

1 0

Nested std::for_each and Boost.Lambda
by Leon Mergen 14 Jun '08

14 Jun '08

Hello, I'm trying to convert the following code to a more functional counterpart using std::for_each: BOOST_FOREACH ( std::vector <keyword_matchable *>::value_type i, haystack->_children ) { std::for_each (needle->_children.begin (), needle->_children.end (), boost::lambda::bind (&keyword_matchable::_match_new, this, i, boost::lambda::_1)); } As you can see, basically this is a nested foreach loop: for each haystack->_children, we're looping for each needle->_children, and calling this->_match_new (haystack_child, needle_child). Now, while code works, as a sort of personal challenge I tried rewriting this to a purely std::for_each () based approach; however, I don't quite understand how I am supposed to use the parent loop's _1 inside a nested loop; consider this code: std::for_each(haystack->_children.begin (), haystack->_children.end (), boost::lambda::bind( boost::lambda::ll::for_each(), needle->_children.begin (), needle->_children.end (), boost::lambda::protect ( boost::lambda::bind ( &keyword_matchable::_match_new, this, boost::lambda::_1, boost::lambda::_1)))); As you can see, i have used the boost::lambda::_1 argument twice; logically, the same argument is provided twice to that function. Now, I've read something about using boost::lambda::protect to "prevent argument substitution to take place", however, I fail to understand how this exactly works. Anyone has any idea how I can call the function keyword_matchable::_match_new with both the current nesting level _1 and the parent nesting level _1 as arguments ? Thanks in advance! Regards, Leon Mergen

1 0

Boost RegEx for C++
by Per Franck 14 Jun '08

14 Jun '08

Hello All. I'm using the C++ library of boost RegEx. Long story short: I'm trying the expression (?<=<h1>).*?(?=</h1>) On the string <h1>hello there</h1> and the engine crashes (asserts in Kernel32(d).dll) Is this a known issue? here's my code snippet. std::vector<std::string> v; boost::RegEx expr( "<h1>hello there</h1>", TRUE); expr.Grep(v, "(?<=<h1>).*?(?=</h1>)" ); thanks for any help! - Per

3 2

Serialization triggers .lib and .exp file generation in VS2005
by Thomas Voigt 13 Jun '08

13 Jun '08

Hi, I tried to use boost serializing for a std::set. The serializing itself works fine, however, after implementing the serialization the compiler started to generate a .exp and a .lib file, even though the application is no DLL. Since the application is large and generating those files takes some time I tracked down the reason, and was surprised to realize that it was the serialization that triggered it. More precisely, the .lib and .exp will be generated if (and only if) I include the 4 lines of code calling the serialization. Any ideas? Boost version is 1.35, Visual Studio 2005 english SP1 on WinXP. Here is the sample (the part that loads the data, the writing part is symmetric): -------------------------- std::istringstream iss(serialized_string); #ifdef SERIALIZE boost::archive::text_iarchive ia(iss); ia >> *myclass; #endif -------------------------- where myclass is a shared pointer to a class that looks basically like this: ----------------------- class foo { std::set<SomeClass> _members; std::string _name; template<class Archive> void serialize(Archive& ar, const unsigned int version) { ar & _name; ar & _members; } } --------------------------- with a custom serialization routine for SomeClass. Any help is appreciated. If there is a mailing list better suited for this discussion then please point me there, I'm new here :-) Regards, Thomas

2 5

[ANN] xpressive v2.1
by Eric Niebler 13 Jun '08

13 Jun '08

I've uploaded to the Boost Vault a new version of xpressive. This should be the version that ultimately becomes part of Boost 1.36. If anybody find problems, pls. let me know. New Features: * skip(), for specifying which parts of the input sequence to ignore when matching it against a regex. http://tinyurl.com/5xndnk (<http://boost-sandbox.sourceforge.net/libs/xpressive/doc/html/boost/xpressiv…>) * regex_replace() accepts formatter objects and formatter expressions, in addition to format strings. http://tinyurl.com/4c8rt4 (<http://boost-sandbox.sourceforge.net/libs/xpressive/doc/html/boost_xpressiv…>) * Range-based regex_replace() algorithm. http://tinyurl.com/4awtoh (<http://boost-sandbox.sourceforge.net/libs/xpressive/doc/html/boost/xpressiv…>) Bugs Fixed: * Crash when semantic actions are placed in look-aheads, look-behinds or independent sub-expressions. Thanks, -- Eric Niebler BoostPro Computing http://www.boostpro.com

1 0

Trying to understand the details of boost function
by Khandelwal, Amit 13 Jun '08

13 Jun '08

I am trying to understand the details of boost function. Below is the sample code that I am using. I was expecting the copy constructor to be invoked once. However, I see that it is called four times. I am trying to understand why does boost function need to have four copies of my objects. I am using boost version 1_33_1. Any thoughts/comments.. #include <iostream> #include <stdlib.h> #include <stdio.h> #include "boost/function.hpp" #include <map> using namespace std; class F { public: F() { cout << "Cons" << endl; } F(const F&) { cout << "Copy const" << endl; } F& operator=(const F&) { cout << "operator = " << endl; return *this; } int operator()(int a, int b) { cout <<" Sub" << endl; return a - b; } }; int main() { FUNC f = F(); } Output: Cons Copy const Copy const Copy const Copy const - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - This message is intended only for the personal and confidential use of the designated recipient(s) named above. If you are not the intended recipient of this message you are hereby notified that any review, dissemination, distribution or copying of this message is strictly prohibited. This communication is for information purposes only and should not be regarded as an offer to sell or as a solicitation of an offer to buy any financial product, an official confirmation of any transaction, or as an official statement of Lehman Brothers. Email transmission cannot be guaranteed to be secure or error-free. Therefore, we do not represent that this information is complete or accurate and it should not be relied upon as such. All information is subject to change without notice. -------- IRS Circular 230 Disclosure: Please be advised that any discussion of U.S. tax matters contained within this communication (including any attachments) is not intended or written to be used and cannot be used for the purpose of (i) avoiding U.S. tax related penalties or (ii) promoting, marketing or recommending to another party any transaction or matter addressed herein.

2 1

Re: [Boost-users] how does one compile boost for MinGW?
by brad＠16systems.com 13 Jun '08

13 Jun '08

I run bjam.exe from the Msys shell... works great. bjam toolset=xxx --build-type=complete install

2 1

Boost::MultiIndex or std::map
by Sean Farrow 13 Jun '08

13 Jun '08

Hi: I am in a situation where by I need to be able to query an associative container. I need to fill the container before querying. The key is an integer and the vlaue is a std::string. Can I construct boost::multiIndex so as to allow key/value pairs to be entered at construction time or should I just use std::map and write a function. Any design advice apreciated. Note thi is going in to a dll with will return c-style types. Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 3164 (20080606) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

5 6

Compiling Boost as static on MacOS (darwin)
by Germain BARRET 13 Jun '08

13 Jun '08

Hi people, I'm sure this subject as already been treated. I apologies for requesting it one time again. I try to compile boost libs as static libs (& multi-thread & universal & why not monolithic) and now I'm sure the ./configure compilation can't do that for me. So I began to go through the bjam way... but I'm absolutely not sure of the syntax and options to do what I want. (--build-type=static ???) My first try made me dynamic ".a" in many many folders and no ./include and no ./lib like in a standard install. And many error message when trying to copy files in the system lib directory (that I don't want to). What is the good way to compile boost on mac OS as static lib in the good folders ? (I've already done it on windows, I remember it much easyer, why ?) Germain

1 0

ublas: problem with having T& as reference type of matrix<T, L, DiskStorage>
by Maarten Nieber 13 Jun '08

13 Jun '08

Hi all, Recently I found out that the ublas matrix uses T& when creating a reference to a matrix element. This causes a problem for me, as I'm developing an ublas matrix that has its data on disk rather than in memory: ublas::matrix< double, row_major, DiskStorage > m; // stores data on disk I would like ublas::matrix to use the reference type that is declared by its storage type. typedef A::reference reference; My question is: is this a mistake in the design, or is there a reason why T& should always be the reference type of an ublas matrix? Thanks in advance, Maarten ps As an illustration, here is some code using the reference type of the DiskStorage class: DiskStorage aDiskStorage( 100 ); // create a disk storage with 100 elements DiskStorage::reference r = aDiskStorage[0]; r = 123.456; // writes 123.456 to disk

2 1

how does one compile boost for MinGW?
by Ákos Maróy 13 Jun '08

13 Jun '08

Hi, I know it's stated that compiling boost for MinGW is not supported, but still, I see some online resources about this. I tried several approaches, but none of them seem to work. Is there any authorotive information on how does it really work? The approaches I tried and which all failed so far: - try to compile boost running bjam.exe from a Windows Command Prompt - try to compile boost from an MSYS prompt, going through the ./configure && make && make install process (I can provide outputs in case they are needed) Any help would be appreciated. Akos

3 3

Compile errors with Phoenix closures
by Martin Apel 13 Jun '08

13 Jun '08

Hi all, I posted this issue a week ago to the Spirit mailing list only, but I got no reply. So I repost this onto the Boost mailing list as well: I tried to compile a Spirit grammar parsing a real number using closures under Microsoft Visual C++ 2005. The same grammar compiles fine on Linux using GCC 4.x. Boost version is 1.35.0 in both cases. As far as I understood, the error is caused by an assertion inside the closure class template: closure_frame_t& context() { assert(frame!=0); return frame.get(); } (line 352 of boost/spirit/phoenix/closures.hpp) Even if I define NDEBUG, Phoenix closures don't compile, because the return statement after the assertion returns a pointer to a closure_frame_t and not a reference. From my point of view, this is not really a compiler issue, but a bug in the header file boost/spirit/phoenix/closures.hpp. I do not understand, why GCC compiles this without any errors, because I think the code should not compile at all. Any help would be appreciated. Martin C:\Programme\boost\boost_1_35_0\boost/spirit/phoenix/closures.hpp(352) : error C2784: 'impl::make_binary3<phoenix::not_eq_op,BaseT0,BaseT1>::type phoenix::operator !=(const phoenix::actor<BaseT> &,const phoenix::actor<BaseT> &)' : could not deduce template argument for 'const phoenix::actor<BaseT> &' from 'phoenix::impl::closure_frame_holder<FrameT>' 3> with 3> [ 3> FrameT=phoenix::closure_frame<phoenix::closure<double,phoenix::nil_t,phoenix::nil_t>> 3> ] 3> C:\Programme\boost\boost_1_35_0\boost/spirit/phoenix/operators.hpp(1869) : see declaration of 'phoenix::operator !=' 3> C:\Programme\boost\boost_1_35_0\boost/spirit/phoenix/closures.hpp(352) : while compiling class template member function 'phoenix::closure_frame<ClosureT> &phoenix::closure<T0,T1,T2>::context(void)' 3> with 3> [ 3> ClosureT=phoenix::closure<double,phoenix::nil_t,phoenix::nil_t>, 3> T0=double, 3> T1=phoenix::nil_t, 3> T2=phoenix::nil_t 3> ] 3> C:\Programme\boost\boost_1_35_0\boost/spirit/attribute/closure.hpp(226) : see reference to class template instantiation 'phoenix::closure<T0,T1,T2>' being compiled 3> with 3> [ 3> T0=double, 3> T1=phoenix::nil_t, 3> T2=phoenix::nil_t 3> ] 3> E:\ma\new_arch\base/SpiritSupport.h(67) : see reference to class template instantiation 'boost::spirit::closure<DerivedT,T0>' being compiled 3> with 3> [ 3> DerivedT=NSBase::ExtRealParserClosure, 3> T0=double 3> ] 3>C:\Programme\boost\boost_1_35_0\boost/spirit/phoenix/closures.hpp(352) : error C2784: 'impl::make_binary2<phoenix::not_eq_op,T0,BaseT>::type phoenix::operator !=(T0,const phoenix::actor<BaseT> &)' : could not deduce template argument for 'const phoenix::actor<BaseT> &' from 'int' 3> C:\Programme\boost\boost_1_35_0\boost/spirit/phoenix/operators.hpp(1861) : see declaration of 'phoenix::operator !=' 3>C:\Programme\boost\boost_1_35_0\boost/spirit/phoenix/closures.hpp(352) : error C2784: 'impl::make_binary1<phoenix::not_eq_op,BaseT,T1>::type phoenix::operator !=(const phoenix::actor<BaseT> &,T1)' : could not deduce template argument for 'const phoenix::actor<BaseT> &' from 'phoenix::impl::closure_frame_holder<FrameT>' 3> with 3> [ 3> FrameT=phoenix::closure_frame<phoenix::closure<double,phoenix::nil_t,phoenix::nil_t>> 3> ] 3> C:\Programme\boost\boost_1_35_0\boost/spirit/phoenix/operators.hpp(1853) : see declaration of 'phoenix::operator !=' 3>C:\Programme\boost\boost_1_35_0\boost/spirit/phoenix/closures.hpp(352) : error C2676: binary '!=' : 'phoenix::impl::closure_frame_holder<FrameT>' does not define this operator or a conversion to a type acceptable to the predefined operator 3> with 3> [ 3> FrameT=phoenix::closure_frame<phoenix::closure<double,phoenix::nil_t,phoenix::nil_t>> 3> ] 3>C:\Programme\boost\boost_1_35_0\boost/spirit/phoenix/closures.hpp(352) : error C2440: 'return' : cannot convert from 'phoenix::closure_frame<ClosureT> *' to 'phoenix::closure_frame<ClosureT> &' 3> with 3> [ 3> ClosureT=phoenix::closure<double,phoenix::nil_t,phoenix::nil_t> 3> ]

1 0

error_code and error_category problem
by Berserker 13 Jun '08

13 Jun '08

In my project (using asio) I have something like this: void Foo::myCallback(const boost::system::error_code &e) { if(e == boost::asio::error::operation_aborted) { // bla bla... } } This call is made across a shared dll and I notice that for a "strange" reason e == boost::asio::error::operation_aborted was always false. I discover that when the temporary object boost::system::error_code is constructed from the constants boost::asio::error::operation_aborted the error_code's costructor take a pointer to a "error_category" and the comparison operator is (m_cat is an error_category pointer): inline friend bool operator==( const error_code & lhs, const error_code & rhs ) { return lhs.m_cat == rhs.m_cat && lhs.m_val == rhs.m_val; } In my situation (using shared modules) lhs.m_cat == rhs.m_cat points to differents memory regions (even if are of the same type "system_category") because of the static initialization in the function "get_system_category". The problem exist in the comparison operator of error_category too: bool operator==(const error_category & rhs) const { return this == &rhs; } I suggest to change the comparison criteria (for example using an enumerated value) _________________________________________________________________ Divertiti con le nuove EMOTICON per Messenger! http://intrattenimento.it.msn.com/emoticon

1 0

test case with ptr_map not compiling
by Christopher Harvey 13 Jun '08

13 Jun '08

This is a pretty simple question, so I'll just go ahead and paste the test case i wrote. The compile errors are right below it. (boost version: 1.34.1-r2) #include <utility> #include <boost/ptr_container/ptr_map.hpp> class Filter { public: virtual void blah() const = 0; }; class SpecificFilter : public Filter { public: SpecificFilter() : Filter() {} void blah() const { } }; int main() { boost::ptr_map<unsigned char, Filter> map; map[0].blah(); } /usr/include/boost/ptr_container/ptr_map_adapter.hpp: In member function 'typename boost::ptr_container_detail::associative_ptr_container<boost::ptr_container_detail::map_config<T, VoidPtrMap>, CloneAllocator>::reference boost::ptr_container_detail::ptr_map_adapter_base<T, VoidPtrMap, CloneAllocator>::insert_lookup(const typename boost::ptr_container_detail::associative_ptr_container<boost::ptr_container_detail::map_config<T, VoidPtrMap>, CloneAllocator>::key_type&) [with T = Filter, VoidPtrMap = std::map<unsigned char, void*, std::less<unsigned char>, std::allocator<std::pair<const unsigned char, void*> > >, CloneAllocator = boost::heap_clone_allocator]': /usr/include/boost/ptr_container/ptr_map_adapter.hpp:268: instantiated from 'typename boost::ptr_container_detail::associative_ptr_container<boost::ptr_container_detail::map_config<T, VoidPtrMap>, CloneAllocator>::reference boost::ptr_container_detail::ptr_map_adapter_base<T, VoidPtrMap, CloneAllocator>::operator[](const typename boost::ptr_container_detail::associative_ptr_container<boost::ptr_container_detail::map_config<T, VoidPtrMap>, CloneAllocator>::key_type&) [with T = Filter, VoidPtrMap = std::map<unsigned char, void*, std::less<unsigned char>, std::allocator<std::pair<const unsigned char, void*> > >, CloneAllocator = boost::heap_clone_allocator]' main.cc:24: instantiated from here /usr/include/boost/ptr_container/ptr_map_adapter.hpp:168: error: cannot allocate an object of abstract type 'Filter' main.cc:5: note: because the following virtual functions are pure within 'Filter': main.cc:7: note: virtual void Filter::blah() const I'm surprised it's not happy about the fact that blah is pure virtual because this is a pointer container so I thought that wouldn't be a problem. Side note: What happens when I try to access an element that doesn't exist, and what happens when I insert two elements with the same key? Thanks for reading, Chris.

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Re: [Boost-users] Quick questions on string algorithms
by Yang Zhang 12 Jun '08

12 Jun '08

*bump*, and also.... When using the split_iterator, is there a way to find a match's offset into the string? (It seems I can only dereference the iterator to get the string, when I would instead like to find the position.) On Fri, Jun 6, 2008 at 4:02 PM, Yang Zhang <yanghatespam(a)gmail.com> wrote: > > Is there a way to split a string only n times? (a la Java's String.split(String, int)) Can one do this in reverse? Is it possible to do this using the split iterator? (Simple example is if I'd like to implement Unix basename and dirname using these algos.) > > Is there anything that could interpret a (C-like) string literal? E.g.: > > "\"hello,\\nworld!\"" -> "hello,\nworld!" > > Thanks in advance! > -- > Yang Zhang > http://www.mit.edu/~y_z/ > -- Yang Zhang http://www.mit.edu/~y_z/

1 0

intrusive avl_set and offset_ptr
by Lothar Werzinger 12 Jun '08

12 Jun '08

Hi, I try to use intrusive avl_set to put the set into a memory mapped file (I manage the file myself using just mapped_region. If I declare my node without offset_ptr my test program works as expected except that the pointers in the file are absolute. If I use offset_ptr I get a runtime assertion (see below). What I don't understand is why the assertion complains about uniqueness. Any help is appreciated! struct BalanceNode : public api::helper::BalanceKey // ,public bin::avl_set_base_hook<bin::optimize_size<true> > ,public bin::avl_set_base_hook< bin::optimize_size<true>, bin::void_pointer< bip::offset_ptr<void> > > { api::values::Decimal m_amount; }; // Define an avl_set using the base hook typedef bin::avl_set< BalanceNode > BalanceSet; /opt2/linux/x86_64/include/boost-1_35/boost/intrusive/avltree.hpp:618: boost::intrusive::tree_iterator<boost::intrusive::avltree_impl<Config>, false> boost::intrusive::avltree_impl<Config>::insert_unique_commit(typename std::iterator_traits<typename boost::intrusive::detail::eval_if_c<boost::intrusive::avltree_impl<Config>::external_value_traits, boost::intrusive::detail::eval_value_traits<typename Config::value_traits>, boost::intrusive::detail::identity<typename Config::value_traits> >::type::pointer>::reference, const typename boost::intrusive::avltree_algorithms<typename boost::intrusive::detail::eval_if_c<boost::intrusive::avltree_impl<Config>::external_value_traits, boost::intrusive::detail::eval_value_traits<typename Config::value_traits>, boost::intrusive::detail::identity<typename Config::value_traits> >::type::node_traits>::insert_commit_data&) [with Config = boost::intrusive::avl_setopt<boost::intrusive::detail::base_hook_traits<tradescape::balance::BalanceNode, boost::intrusive::avltree_node_traits<boost::interprocess::offset_ptr<void>, true>, safe_link, boost::intrusive::default_tag, 6>, std::less<tradescape::balance::BalanceNode>, long unsigned int, true>]: Assertion `node_algorithms::unique(to_insert)' failed. Lothar -- Lothar Werzinger Dipl.-Ing. Univ. framework & platform architect Tradescape Inc. - Enabling Efficient Digital Marketplaces 1754 Technology Drive, Suite 128 San Jose, CA 95110 web: http://www.tradescape.biz

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Re: [Boost-users] [boost-users][multi-index] iterating though index keys
by JOAQUIN M. LOPEZ MUÑOZ 12 Jun '08

12 Jun '08

_______________________________________ De: boost-users-bounces(a)lists.boost.org [boost-users-bounces(a)lists.boost.org] En nombre de Igor R [boost.lists(a)gmail.com] Enviado el: jueves, 12 de junio de 2008 19:58 Para: boost-users(a)lists.boost.org Asunto: Re: [Boost-users] [boost-users][multi-index] iterating though indexkeys > Hi Joaquín, > > > for(Entries::iterator > > it_key=entries.begin(),end=entries.end();it_key!=end;){ > > // get all elements with key it_key->someForeignKey > > std::pair<Entries::iterator,Entries::iterator> values= > > entries.equal_range(it_key->someForeignKey); > > while(values.first!=values.second){ > > // process element > > ++values.first; > > } > > // next key is just that of the element right after the current value > > group > > it_key=values.second; > > } > > Thank you! It seems to be exactly what I need. > However, I'm not sure I got the principle right: how come that "next > key is just that of the element right after the current value"? Is > this the general behavior of equal_range - despite of the kind of the > index (ordered/hashed, unique/non-unique)? Yep, and the behavior of STL containers like std::multiset, for that matter. This is easily seen if you consider that indices of a multi_index_container (and STL containers) guarantee that elements with equivalent key are grouped together. So, if you hop from a group of same-key elements to the next you end up visiting all the keys present in the container. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

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Re: [Boost-users] [boost-users][multi-index] iterating though index keys
by Igor R 12 Jun '08

12 Jun '08

Hi Joaquín, > for(Entries::iterator > it_key=entries.begin(),end=entries.end();it_key!=end;){ > // get all elements with key it_key->someForeignKey > std::pair<Entries::iterator,Entries::iterator> values= > entries.equal_range(it_key->someForeignKey); > while(values.first!=values.second){ > // process element > ++values.first; > } > // next key is just that of the element right after the current value > group > it_key=values.second; > } Thank you! It seems to be exactly what I need. However, I'm not sure I got the principle right: how come that "next key is just that of the element right after the current value"? Is this the general behavior of equal_range - despite of the kind of the index (ordered/hashed, unique/non-unique)?

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[boost-users][multi-index] iterating though index keys
by Igor R 12 Jun '08

12 Jun '08

Hi, I'm trying to replace few data structures and types defined in my application in terms of std containers, with the mutli_index_container. Some of those types look like this: struct Entry { int someForeignKey; int data1; std::string data2; //.... }; typedef std::deque<Entry> Entries; typedef std::map<int, Entries> EntriesByForeignKey; I'd like to rewrite the above map as follows: typedef mi::multi_index_container < Entry, mi::indexed_by < mi::hashed_non_unique<mi::tag<foreignKey>, mi::member<Entry, int, &Entry::someForeignKey> > > > Entries; typedef Entries::index<foreignKey>::type EntriesByForeignKey; Now, I'd like to iterate through the *keys* of this index, and for each key - iterate through all its values. IIUC, the second part can be accomplished like this: { Entries entries; EntriesByForeignKey::iterator begin = entries.get<foreignKey>().find(theKey), end = entries.get<foreignKey>().end(); for_each (begin, end, ....); } ...but how can I iterate through all the keys of this index? Or should I define another index for this purpose (sequenced one?) ? Thank you, Igor'.

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phoenix question
by Hansi 12 Jun '08

12 Jun '08

Hello, at the moment I'm reading the documentation from Phoenix. Now I have read in the first pages that there are 2 possibilities to define a functor 1) find_if(c.begin(), c.end(), arg1 % 2 == 1) 2) struct is_odd_ { template <typename ArgT> struct result { typedef bool type; }; template <typename ArgT> bool operator()(ArgT arg1) const { return arg1 % 2 == 1; } }; function<is_odd_> is_odd; Okay this 2 possibilities I understand. But There is also written that for much more complex functions the second possibility is more efficient. Can anyone say why this is more efficient? Best regards Hansjörg

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customized circular_buffer (thread safe implementation)
by Selçuk Giray Özdamar 12 Jun '08

12 Jun '08

Hi everyone, I wrote my template based CircularBuffer class. Here the primary aim is to make everything thread safe. Multiple concurrent reads are possible, but only exclusive write is possible. Here we have index operator overloaded. As usual index operator has 2 versions, const and non-const versions. T& operator [] (unsigned index); // return as reference T operator [] (unsigned index) const; // return by value In contrast, standart library container classes return by const reference in const methods. Here I'm returning by value. Below you can see my complete implementation. There may be possible potential risks here. For example, in overloaded index operator (const function) it returns by value, so read lock assures it's safety. But I can't say the same things for non-const function which returns reference. If you write something like this: T& _refT = mCircularBuffer[0]; It returns as reference, and some other time you are free to change the value of _refT (after leaving the index operator scope). So write lock is unlocked, and as a consequence it's not thread safe so. And also iterators are same as the index operator, not thread safe. I'm looking for much safer implementation. Thanks, regards... template <class T> class CircularBuffer { typedef boost::shared_mutex ReadWriteMutex; typedef boost::shared_lock<boost::shared_mutex> ReadLock; typedef boost::unique_lock<boost::shared_mutex> WriteLock; public: // A const (random access) iterator used to iterate through the circular_buffer typedef typename boost::circular_buffer<T>::const_iterator const_iterator; // A (random access) iterator used to iterate through the circular_buffer typedef typename boost::circular_buffer<T>::iterator iterator; explicit CircularBuffer(unsigned capacity = 10) : m_capacity(capacity) , m_buffer(capacity) { } ~CircularBuffer() { } CircularBuffer(const CircularBuffer& other) : m_capacity(other.m_capacity) , m_buffer(other.m_buffer) { } CircularBuffer& operator= (const CircularBuffer& other) { CircularBuffer temp(other); WriteLock w_lock(rw_mutex); using std::swap; swap(m_capacity, temp.m_capacity); swap(m_buffer, temp.m_buffer); return *this; } // Get the iterator pointing to the beginning of the <code>circular_buffer</code>. iterator begin() { WriteLock w_lock(rw_mutex); return m_buffer.begin(); } // Get the iterator pointing to the end of the <code>circular_buffer</code>. iterator end() { WriteLock w_lock(rw_mutex); return m_buffer.end(); } // Get the const iterator pointing to the beginning of the <code>circular_buffer</code> const_iterator begin() const { ReadLock r_lock(rw_mutex); return m_buffer.begin(); } // Get the const iterator pointing to the end of the <code>circular_buffer</code>. const_iterator end() const { ReadLock r_lock(rw_mutex); return m_buffer.end(); } T& operator [] (unsigned index) { WriteLock w_lock(rw_mutex); return m_buffer[index]; } T operator [] (unsigned index) const { ReadLock r_lock(rw_mutex); return m_buffer[index]; } T& at(unsigned index) { WriteLock w_lock(rw_mutex); return m_buffer.at(index); } T at(unsigned index) const { ReadLock r_lock(rw_mutex); return m_buffer.at(index); } T& front() { WriteLock w_lock(rw_mutex); return m_buffer.front(); } T& back() { WriteLock w_lock(rw_mutex); return m_buffer.back(); } T front() const { ReadLock r_lock(rw_mutex); return m_buffer.front(); } T back() const { ReadLock r_lock(rw_mutex); return m_buffer.back(); } size_t size() const { ReadLock r_lock(rw_mutex); return m_buffer.size(); } bool empty() const { ReadLock r_lock(rw_mutex); return m_buffer.empty(); } bool full() const { ReadLock r_lock(rw_mutex); return m_buffer.full(); } size_t capacity() const { ReadLock r_lock(rw_mutex); return m_buffer.capacity(); } void push_back(const T& item = T()) { WriteLock w_lock(rw_mutex); m_buffer.push_back(item); } void clear() { WriteLock w_lock(rw_mutex); m_buffer.clear(); } private: unsigned m_capacity; boost::circular_buffer<T> m_buffer; // rw_mutex for internal buffer mutable ReadWriteMutex rw_mutex; };

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[Boost.Test] BOOST_CHECK_EQUAL and std::type_info
by Paul S. Strauss 11 Jun '08

11 Jun '08

I can't seem to get BOOST_CHECK_EQUAL with std::type_info instances to compile with g++, version (GCC) 4.1.2 20070925 (Red Hat 4.1.2-33) Here's a simple test case: ------------------ #include <iostream> #include <typeinfo> #define BOOST_TEST_MAIN #include <boost/test/included/unit_test.hpp> std::ostream & operator<<(std::ostream &out, const std::type_info &info) { return out << info.name(); } BOOST_AUTO_TEST_CASE(Foo) { std::cout << "Typeid of int is " << typeid(int) << "\n"; BOOST_CHECK_EQUAL(typeid(int), typeid(float)); } ------------------ g++ complains that there isn't an operator<< for type_info in the BOOST_CHECK_EQUAL, even though it is used just fine on the previous line. Output: g++ -o ti ti.cpp /usr/include/boost/test/test_tools.hpp: In member function ‘void boost::test_tools::tt_detail::print_log_value<T>::operator()(std::ostream&, const T&) [with T = std::type_info]’: /usr/include/boost/test/test_tools.hpp:404: instantiated from ‘std::ostream& boost::test_tools::tt_detail::operator<<(std::ostream&, const boost::test_tools::tt_detail::print_helper_t<T>&) [with T = std::type_info]’ /usr/include/boost/test/utils/wrap_stringstream.hpp:66: instantiated from ‘boost::basic_wrap_stringstream<CharT>& boost::operator<<(boost::basic_wrap_stringstream<CharT>&, const T&) [with CharT = char, T = boost::test_tools::tt_detail::print_helper_t<std::type_info>]’ /usr/include/boost/test/test_tools.hpp:460: instantiated from ‘void boost::test_tools::tt_detail::check_frwd(Pred, boost::wrap_stringstream&, boost::test_tools::const_string, size_t, boost::test_tools::tt_detail::tool_level, boost::test_tools::tt_detail::check_type, const Arg0&, const char*, const Arg1&, const char*) [with Pred = boost::test_tools::tt_detail::equal_impl_frwd, Arg0 = std::type_info, Arg1 = std::type_info]’ ti.cpp:14: instantiated from here /usr/include/boost/test/test_tools.hpp:298: error: no match for ‘operator<<’ in ‘ostr << t’ <List of candidates removed, but type_info isn't one of them> Anyone know why this is? -- Paul S. Strauss pss(a)acm.org

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[Test] custom Exception
by Jarl Friis 11 Jun '08

11 Jun '08

Is there any nice way to achive more detailed information about uncaught custome exceptions in a Boost unit test. I understand that it is possible to register custom exceptions, but that is quite some work when using several 3rd party libraries. I would be even hapier if it was possible to get some stacktrace, or linenumber (within the Boost test file) on which the exception occured. Jarl

2 1

Finding several Files
by German Escallon 11 Jun '08

11 Jun '08

Hello All, I am trying to figure out the path to several files w/ the same name inside a certain directory structure. I was thinking of using the find_file() function from the filesystem library (see below). Unfortunately, the function stops when the first match is encountered. Is there a better way and/or alternative?? Thanks. ~G bool find_file( const path & dir_path, // in this directory, const std::string & file_name, // search for this name, path & path_found ) // placing path here if found { if ( !exists( dir_path ) ) return false; directory_iterator end_itr; // default construction yields past-the-end for ( directory_iterator itr( dir_path ); itr != end_itr; ++itr ) { if ( is_directory(itr->status()) ) { if ( find_file( itr->path(), file_name, path_found ) ) return true; } else if ( itr->leaf() == file_name ) // see below { path_found = itr->path(); return true; } } return false; } ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________

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[bjam, binary compatibility] --layout=system and copying of binaries; different compiler versions
by Christoph Duelli 11 Jun '08

11 Jun '08

Following scenario: I have two machines M_a and M_b. M_a is running gcc4.1, M_b is running gcc4.2. Both have the same Boost Libs (1.35) compiled -with identical options- and installed (with their resp. gcc). I have used bjam option --layout=system. The Boost libs do therefore *not* have gcc41 or gcc42 in their names. Thus, the names are the same on both machines... which leads me to the following question: May I copy binaries (that link against Boost.Regex, Boost.FileSystem etc) from M_a to M_b? (or vice versa) The linker is happy as the libs required are there, but will it really work? Is this an *evil* thing to do? Best regards Christoph

2 1

[boost-users] Build boost libraries (e.g. filesystem) with gcc and -m32
by Andreas Profous 11 Jun '08

11 Jun '08

Hi all, I'm working on Intel Core2 Duo machine running Linux and have the following problem: I want to compile 32-bit versions of the boost libs with gcc, so that I can link and create 32bit programs. Unfortunately if I use bjam --toolset=gcc stage the libraries are built as 64bit libraries so if I link I get the following error: >g++ filesystem_test.cpp -g -m32 -c -o filesystem_test.o -L../boost/boost_1_35_0/stage/lib -I../boost/boost_1_35_0 >g++ filesystem_test.o -L../boost/boost_1_35_0/stage/lib -m32 -o filesystem_test -lboost_filesystem-gcc41-mt /usr/bin/ld: skipping incompatible .../boost/boost_1_35_0/stage/lib/libboost_filesystem-gcc41-mt.so when searching for -lboost_filesystem-gcc41-mt If I omit -m32 everything works fine. Help is very much appreciated, Andreas

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Re: [Boost-users] boost filesystems and case issues
by brad＠16systems.com 11 Jun '08

11 Jun '08

I tried this. It seems to work. int lower_case(int c) { return tolower(c); } ... ... ... if (boost::filesystem::is_regular(itr->path())) { path = itr->path(); lpath = path.string(); transform(lpath.begin(), lpath.end(), lpath.begin(), lower_case); std::cout << path << std::endl; std::cout << lpath << std::endl; }

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Re: [Boost-users] [math/special_functions] newbie question: compiler error with factorial
by Sakaie, Ken 11 Jun '08

11 Jun '08

Thank you Steven and John for the fixes, explanation, and fast reply! =================================== P Please consider the environment before printing this e-mail Cleveland Clinic is ranked one of the top hospitals in America by U.S. News & World Report (2007). Visit us online at http://www.clevelandclinic.org for a complete listing of our services, staff and locations. Confidentiality Note: This message is intended for use only by the individual or entity to which it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and destroy the material in its entirety, whether electronic or hard copy. Thank you.

1 0

program_options: emit usage message on unknown option ?
by Stephen Collyer 11 Jun '08

11 Jun '08

Is it possible to have boost::program_options emit a usage message when an unknown option is supplied ? I have code which is parsing its options like this: > void UserAPI::parse_options(const std::vector<std::string>& required_options, > int argc, char* argv[], > std::string usage) > { > po::store(po::parse_command_line(argc, argv, options_desc_, options_style_), vm_); > po::notify(vm_); > > // count how many required options we have > > uint count = 0; > for (std::vector<std::string>::const_iterator s = required_options.begin(); > s != required_options.end(); ++s) > { > count += vm_.count(*s); > } > > // if we have a help option, or we don't have all the required options > // emit the usage message > > if ( vm_.count("help") || count != required_options.size() > ) > { > std::cout << usage << std::endl; > std::cout << options_desc_ << std::endl; > exit(1); > } > } If I pass an unknown option, it seems to be handled automagically: > install/linux/general -orgid ABC -p fred > unknown option -p I don't want this - I want to catch it somehow and emit my usage message, but this seems not to be documented, AFAICS. Anyone know how this can be done ? -- Regards Steve Collyer Netspinner Ltd

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shared_ptr and multi_set
by Robert Kubrick 11 Jun '08

11 Jun '08

I am having a memory error when accessing a shared_ptr in a multi_set collection. I caught this comment in the shared_ptr documentation: int main() { std::vector<FooPtr> foo_vector; std::set<FooPtr,FooPtrOps> foo_set; // NOT multiset! ... http://www.boost.org/doc/libs/1_35_0/libs/smart_ptr/example/ shared_ptr_example.cpp So I guess shared_ptr in multi_set are not supported?

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[math/special_functions] newbie question
by Sakaie, Ken 11 Jun '08

11 Jun '08

I did the following 'hello-world'-level test of the factorial function and get the following error. > cat test.cpp #include "boost/math/special_functions/factorials.hpp" int main() { unsigned int i = 6; printf("%d\n", boost::math::factorial(i)); } > g++ -I/home/sakaiek/ext/src/boost_1_35_0/ test.cpp test.cpp: In function int main(): test.cpp:5: error: no matching function for call to factorial(unsigned int&) I think I set up the include directory correctly: > ls /home/sakaiek/ext/src/boost_1_35_0/boost/math/special_functions acosh.hpp beta.hpp detail ellint_3.hpp ellint_rj.hpp fpclassify.hpp laguerre.hpp math_fwd.hpp sinhc.hpp asinh.hpp binomial.hpp digamma.hpp ellint_rc.hpp erf.hpp gamma.hpp lanczos.hpp powm1.hpp sin_pi.hpp atanh.hpp cbrt.hpp ellint_1.hpp ellint_rd.hpp expm1.hpp hermite.hpp legendre.hpp sign.hpp spherical_harmonic.hpp bessel.hpp cos_pi.hpp ellint_2.hpp ellint_rf.hpp factorials.hpp hypot.hpp log1p.hpp sinc.hpp sqrt1pm1.hpp Any help would be greatly appreciated. Thanks! =================================== P Please consider the environment before printing this e-mail Cleveland Clinic is ranked one of the top hospitals in America by U.S. News & World Report (2007). Visit us online at http://www.clevelandclinic.org for a complete listing of our services, staff and locations. Confidentiality Note: This message is intended for use only by the individual or entity to which it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and destroy the material in its entirety, whether electronic or hard copy. Thank you.

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Re: [Boost-users] Serialization triggers .lib and .exp file generationin VS2005
by spock＠snafu.de 11 Jun '08

11 Jun '08

Robert Ramey wrote: > Thomas Voigt wrote: >> Robert Ramey schrieb: >>> This is a side effect of the steps taken inhibit the compiler from >>> eliminationg code not explicitly referred to. (aka code stripping). >> >> So is there a way around it? Since we use boost in a rather controlled >> environment (only VS2005) we could patch it locally. > > well, we wouldn't put it in there if there was an easy way around it. Sure :-) > You could comment out all the _export keywords in the code. But > its doubtful that serialization of pointers could be made to work. Could you elaborate what the problem is exactly? We don't want to serialize pointers, at least not at the moment. Regards, Thomas

1 0

Using boost file memory mapping (managed_mapped_file) with a vector
by Henry 11 Jun '08

11 Jun '08

I am trying to use a vector with a managed_mapped_file. http://www.boost.org/doc/libs/1_35_0/doc/html/boost/interprocess/vector.html seems to indicate this can be done. When I try to run the code below, it fails with a "bus error" (on OS X) after printing "Entering item in vector". What am I doing wrong? Also, how can I grow this managed_mapped_file as I add things to the vector? I get runtime errors using the managed_mapped_file::grow() function. The code below should just fill up a vector with powers of 2, and print it. I am trying to understand the library before I implement it for something real. Code below: #include <boost/interprocess/file_mapping.hpp> #include <boost/interprocess/mapped_region.hpp> #include <boost/interprocess/containers/vector.hpp> #include <boost/interprocess/managed_mapped_file.hpp> #include <boost/interprocess/managed_shared_memory.hpp> #include <boost/interprocess/containers/vector.hpp> #include <boost/interprocess/allocators/allocator.hpp> #include <iostream> #include <fstream> #include <cstring> #include <cstddef> #include <cstdio> #include <cmath> int main () { using namespace boost::interprocess; try{ std::cout << "Starting" << std::endl; managed_mapped_file mfile (open_or_create, "MyMappedFile", 65536); std::cout << "Mapped file" << std::endl; typedef allocator<int, managed_shared_memory::segment_manager> ShmemAllocator; typedef vector<int, ShmemAllocator> MyVector; const ShmemAllocator alloc_inst (mfile.get_segment_manager()); std::cout << "Making vector" << std::endl; MyVector* vec = mfile.construct<MyVector>("vec")(alloc_inst); std::cout << "Made vector" << std::endl; std::cout << "Filling vector" << std::endl; int i = 0; for(i = 0; i < 63; ++i) { std::cout << "Entering item in vector" << std::endl; vec->push_back(pow(2,i)); std::cout << "Entered item in vector" << std::endl; } std::cout << "Filled vector" << std::endl; std::cout << "Size of vec is:\t" << vec->size() << std::endl; std::cout << "Reverse printing contents of vector" << std::endl; for(i = vec->size()-1; i >= 0; --i) { std::cout << "At " << i << ":\t" << vec->at(i) << std::endl; } std::cout << "Printed contents of vector" << std::endl; } catch(interprocess_exception &ex){ std::remove("MyMappedFile"); std::cout << ex.what() << std::endl; return 1; } std::remove("MyMappedFile"); return 0; }

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Re: [Boost-users] darwin universal static libs for release and debug for 1.35.0
by Daniel Lord 11 Jun '08

11 Jun '08

> > From: Jeff Flinn <TriumphSprint2000(a)hotmail.com> > To: boost-users(a)lists.boost.org Date: Tue, 10 Jun 2008 16:25:43 -0400 Subject: Re: [Boost-users] darwin universal static libs for release and debug for 1.35.0 Jeff Flinn wrote: Jeff Flinn wrote: > >> Trying to build universal static libs for darwin. >> >> bjam --toolset=darwin --architecture=combined stage >> >> appears to only build libboost_*_mt-1_35.dylib's and >> libboost_test_exec_monitor-mt-1_35.a. Whereas the default for 1.34.1 was to >> build all libs. >> >> I need to build release and debug static libs. I'm having problems finding >> the command line flags in the docs. >> >> This is my first foray into mac/unix builds for boost. Any help is >> appreciated. >> >> Thanks, Jeff >> > > Ok, that was easy after reading the boost build docs: > > bjam --toolset=darwin --architecture=combined link=static threading=multi > stage debug release > For Posterity, the full command req'dis: bjam --toolset=darwin --architecture=combined link=static threading=multi address-model=32 macosx-version=10.4 stage debug release Thanks, Jeff Due to issues with the configs for OS X, you have to use the bjam calls and Jeff pointed out the correct ones.Nota Bene: if you want to build 66-bit libs, not all of them build (for shared libs) and you have a to add: macosx-version=10.5 In my shell script I made for building various configurations I use the following command where: link_type = static | shared local_arch = x86 | power local_address_model = 32 | 64 bjam release debug toolset=darwin \ link=${link_type} \ threading=multi \ architecture=${local_arch} \ address-model=${local_address_model} \ macosx-version=10.5 Works for me. -- "It's not how many years you live--it's how much life you put in your years" -- Sierra Mountain Guides

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[Graph] Problem Compiling BGL-Python
by ZSS 11 Jun '08

11 Jun '08

Hi, I'm facing difficulty in compiling BGL-Python (which I'm not familiar with). I followed all the instructions in the README file, however, when I reach the stage where I need to run bjam I recieve this error: error: Could not find parent for project at '.' error: Did not find Jamfile.jam or Jamroot.jam in any parent directory. However, when I move the bgl-python-0.9 directory and put it under boost_1_35_0 I get a different error message: Jamfile:13: in modules.load rule project-root unknown in module Jamfile I don't know what to do, any hints are highly appreciated. Thank you, Zee

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graph visualization
by Dennis Yurichev 10 Jun '08

10 Jun '08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, I'm looking for some open-source solution which is able to vizualize boost::graph structures. I mean, I develope software which use boost::graph extensively and I wish to offer end-user to see it visually and edit it. It's not a problem to export to some GDL file for example, and use external tool, but user interaction should be present. Are there anything ready-made or I doomed to develope my own? P.S. Target is Win32 GDI API. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (MingW32) iD8DBQFITurt1YPmFmJG++MRAmYTAKDe0rEYszytT7f70y6up3f5js45ngCfTQHP uJ5SJhSb0tKlNG62DwwMJoI= =193P -----END PGP SIGNATURE-----

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darwin universal static libs for release and debug for 1.35.0
by Jeff Flinn 10 Jun '08

10 Jun '08

Trying to build universal static libs for darwin. bjam --toolset=darwin --architecture=combined stage appears to only build libboost_*_mt-1_35.dylib's and libboost_test_exec_monitor-mt-1_35.a. Whereas the default for 1.34.1 was to build all libs. I need to build release and debug static libs. I'm having problems finding the command line flags in the docs. This is my first foray into mac/unix builds for boost. Any help is appreciated. Thanks, Jeff

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boost filesystems and case issues
by brad＠16systems.com 10 Jun '08

10 Jun '08

I've looked through the documentation and Googled, but I cannot find any info on the topic. If I want to find a file named 'System.dll', but on some systems the file is named 'system.DLL' or 'SYSTEM.DLL', etc. If I could could do something like this: if (boost::filesystem::is_regular(itr->path())) { std::cout << itr->path().lower() << std::endl; } Notice the .lower() In this way, each path would be lowercase and I could search for only 'system.dll' and .lower() would find any occurrence of that filename, no matter the case. I wonder how others do this today? Do you use transform or tolower from another library? Thank you

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A question about boost::bind function
by 风舞影天 10 Jun '08

10 Jun '08

I'm a newbie in boost library and sorry for my poor English. I have a project now, it was created in Visual Studio.Net 2003 and the version of the boost library is 1.33.1, all thing is good. But, When I replaced the boost library with the new version 1.34.1 or 1.35.0, the project can't compiled correct. The error message is 'can't convert const sometype& to sometype&'. So, i force myself to read the source code of boost library and compare them betwwen version 1.33.1 and version 1.44.1. at last, I found the problem and written a test program. The following code is the test program: #include "stdafx.h" #include <boost/bind.hpp> #include <vector> #include <algorithm> struct _sUserData { int m_nUserId; int m_nUserAge; _sUserData() : m_nUserId( rand() ) , m_nUserAge( rand()%100+1 ) { } }; void AddUserAge( int& age ) { ++age; } int _tmain(int argc, _TCHAR* argv[]) { std::vector<_sUserData> vUserData; for( int i = 0; i < 10; ++i ) vUserData.push_back( _sUserData() ); std::for_each( vUserData.begin(), vUserData.end(), boost::bind( AddUserAge, boost::bind( &_sUserData::m_nUserAge, _1 ) ) ); return 0; } If i change the function AddUserAge( int& age ) to AddUserAge( const int& age ), all things is good. but I need change this parameter. In the version 1.33.1, the data member formal boost::bind function was defined as following: template<class R, class T, class A1> _bi::bind_t< R, _mfi::dm<R, T>, typename _bi::list_av_1<A1>::type > BOOST_BIND(R T::*f, A1 a1) { typedef _mfi::dm<R, T> F; typedef typename _bi::list_av_1<A1>::type list_type; return _bi::bind_t<R, F, list_type>( F(f), list_type(a1) ); } In the version 1.35.0, the boost::bind function was defined as following: template< class A1, class M, class T > _bi::bind_t< typename _bi::dm_result< M T::*, A1 >::type, _mfi::dm<M, T>, typename _bi::list_av_1<A1>::type > BOOST_BIND( M T::*f, A1 a1 ) { typedef typename _bi::dm_result< M T::*, A1 >::type result_type; typedef _mfi::dm<M, T> F; typedef typename _bi::list_av_1<A1>::type list_type; return _bi::bind_t< result_type, F, list_type >( F( f ), list_type( a1 ) ); } Although the code that is similar to the version 1.33.1 is existed, but it is written in a macro condition, and in my environment is invalid, so ignore it. The difference is the return type. The boost::_bi::dm_result is defined as following: namespace _bi { template< class Pm, int I > struct add_cref; template< class M, class T > struct add_cref< M T::*, 0 > { typedef M type; }; template< class M, class T > struct add_cref< M T::*, 1 > { typedef M const & type; }; template<class R> struct isref { enum value_type { value = 0 }; }; template<class R> struct isref< R& > { enum value_type { value = 1 }; }; template<class R> struct isref< R* > { enum value_type { value = 1 }; }; template<class Pm, class A1> struct dm_result { typedef typename add_cref< Pm, 1 >::type type; }; template<class Pm, class R, class F, class L> struct dm_result< Pm, bind_t<R, F, L> > { typedef typename bind_t<R, F, L>::result_type result_type; typedef typename add_cref< Pm, isref< result_type >::value >::type type; }; } the compiler will convert the result type to const reference, then pass it to user's function, the error is caught. Now, all things is come out. But I don't understand why add const reference to the result type and the behavior is difference with the version 1.33.1. Wait for your answer and thanks for your time, and sorry for my poor in English:)

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[boost-users][tuple, bind] binding tuple element
by Igor R 10 Jun '08

10 Jun '08

Hello, Given a vector of tuples, like this: vector<tuple<int, std::string> > tuples_; I want create a binder to find a tuple by one of its "attributes". If it would be a struct: struct Tuple { int id_; string name_; }; ...I'd use it like this: find_if(tuples_.begin(), tuples_.end(), bind(&Tuple::name_, _1) == "kuku"); How can bind tuples::get<1>() function? Thanks a lot, Igor'.

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More Granularity in boost::serialization "stream error"?
by eric 10 Jun '08

10 Jun '08

Hello, How can I get more detail when boost::serialization raises the exception "stream error"? I find that this one error can result from a wide variety of dissimilar root causes, but regardless of the nature of the problem (or the size of the buffer) the only information provided by boost::serialization is that one opaque string. It is easy to lose a lot of time tracking down the problem. I have worked with other more traditional XML parsers that raise exceptions in the form "Unexpected character in line x column y." I am aware that the architecture of boost::serialization is completely different to that of a traditional XML parser but the bottom line is the same, if I could get more granularity on this exception it would save a lot of time troubleshooting. Debugging seems not to be an option as my debugger (gdb) gets lost in boost header files and templates. I am left with trial and error, chopping up the stream into smaller pieces until I can isolate the invalid content. Any ideas? Thanks, Eric

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Create boost_1_33_1 boost::archive::text_iarchive with an empty stream
by Gancho Manev 10 Jun '08

10 Jun '08

Hi, The following code does not throw archive_exception always: std::stringstream ss; boost::archive::text_iarchive ia(ss); The archive_exception is thrown always on VC++2005/Windows while on GCC3.2.2/Redhat8 and GCC3.4.6/CentOS a std::length_error: basic_string::resize is thrown sometimes. That means the constructor tries to resize some string with value > basic_string.max_size(). The GCC defines the max_size() to be only about a quarter of the max length the allocator can get. That explains why that exception happens to be raised on GCC. A search of the source code lead me to the overloaded methods 'load' of text_iarchive_impl<Archive>. They look suspicious because do not check the input stream state before using the string size just loaded. The local variable is not initialized nor loaded, so it contains some arbitrary value! In the method load(std::string&) that might cause std::length_error while in load(char *s) - even program crash. The code in the next Boost versions does not seem to be changed. Has anyone encountered such behavior? I've not found that bug reported. Thanks in advance, Gancho

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Using boost::thread with windows events
by Sean Farrow 10 Jun '08

10 Jun '08

Hi: I am neding to use boost::thread with windows events, dos anyone know whether this is possible/whether there are any examples. Basically, I need to exit the thread when a variable becomes fales. Any help apreciated. Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 3171 (20080610) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

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yet another logging library
by Mojmir Svoboda 10 Jun '08

10 Jun '08

Hello, i'm trying to create a logging library framework. It is my second attempt, the first can be seen at http://www.codeplex.com/flog . There is some documentation in the doc directory that is perhaps worth reading. The first version used boost::iostreams and not very smart locking mechanism in mt environment (in terms of performance mainly), but served more as a verification 'it can be done and it is not that ugly as i thought' than a real library candidate. Now i'd like to focus on performance and code size, so I made a sketch of the next version. It is really small and is rather a model than anything usable, but before I start implementation, I'd like to know opinion of library writers and users - what do you think about the concept? is it worth continuing, or i'd better go doing something better? :) The sketch of the next version can be seen at http://www.codeplex.com/fflog It's meant to be illustration of the interface and it's usage itself. Short summary of the design: User specifies compile-time vector of requested filters that apply to the logged text. Each filter requiring user's input is tagged and when logging function is invoked, the supplied types are checked against expected type, set to filter and later written to a buffer. Buffers are managed by the sink_manager and likely is one of few places that has to be mt-safe, as the rest is on the stack. I thought about some lock-free queues of buffers that are assigned to caller and filled returned back to write. The actual write of the buffer can be performed in dedicated lower-priority thread. Run-time filtering like level or context is possible, but not implemented yet. The main idea can be seen in the 1st version in runtime_filtering.hpp. Again, runtime values are shared among threads, so they have to be protected in mt environment. Many thanks for your attention, Mojmir

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parallel-iteration
by e r 10 Jun '08

10 Jun '08

Hi, suppose i have container_type<range_type> seqs; i'm looking for iterator, whose instance I call i, such that if(*i == seq [j][k] ){ if(j<seqs.size()){ ++i; *i == seq[j+1][k] }else{ ++i; *i == seq[0][k+1] } if anyone has this or anything similar, could he/she kindly share it? the above is not quite the same as zip_iterator, as the parallel ranges all have the same type. also i'm aware that multi_arrays deal with this, but here i'm interested in arbitrary type. thanks for reading this thread, e.

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is there strided iterator already available somewhere?
by e r 10 Jun '08

10 Jun '08

hello, is there strided iterator already available somewhere? iter = vec.begin(); std::advance(iter,offset) for(unsigned int i=0; i<(vec.size()-offset)/stride; ++i){ /* do something with iter */ std::advance(iter,stride) } alternatively, a permutation iterator does not seem very practical here... thanks, e.

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metafunction invocation performance
by Hicham Mouline 09 Jun '08

09 Jun '08

Hello, I submitted a post a few days ago http://lists.boost.org/boost-users/2008/06/36852.php and I went to investigate on my own. Having not reached a solution to speed up the compilation, I looked again at the post and realized the code didn't compile due to a wrong paste. Apologies (if anyone tried), Anyways, here is the version that is too slow and runs out of mem during compilation on a P4 512Mb minimal redhat box with g++4.1 while, on core2duo 2Gb vista64 with intel 10.1, it compiles in 40s and runtime is correct. The point is to generate all template "curve" specializations for various tmpl arguments (constant, linear....) (cross product of 3 mpl sequences interpolator_types, extrapolator_types and integrator_types , each containing the possible tmpl type arguments 1, 2 and 3), and insert the fully specialized templates curve<T1, T2, T3> in a mpl vector "curve_types" to be used by make_variant_over. Regards, -------------------- #include <iostream> #include <boost/mpl/pair.hpp> #include <boost/mpl/placeholders.hpp> #include <boost/mpl/fold.hpp> #include <boost/mpl/vector/vector0.hpp> #include <boost/mpl/vector.hpp> #include <boost/mpl/joint_view.hpp> #include <boost/mpl/transform.hpp> #include <boost/mpl/for_each.hpp> #include <boost/mpl/size.hpp> #include <boost/variant.hpp> class constant {}; class linear {}; class polynomial {}; class cubic_spline {}; class simpson {}; template <typename inter, typename extra, typename integ> class curve {}; template <typename inter, typename extra, typename integ> struct curve_metafunction { typedef curve<inter,extra,integ> type; }; template<typename T> struct pair_with : boost::mpl::pair<T,boost::mpl::_> {}; template<typename pair> struct triple_with : curve_metafunction<typename pair::first, typename pair::second, boost::mpl::_> {}; template<typename Sequence1,typename Sequence2> struct sequence_product : boost::mpl::fold< Sequence1, boost::mpl::vector0<>, boost::mpl::joint_view< boost::mpl::_1, boost::mpl::transform< Sequence2, pair_with<boost::mpl::_2> > > > {}; template<typename SequencePair, typename Sequence> struct seq_seqpair_product : boost::mpl::fold< SequencePair, boost::mpl::vector0<>, boost::mpl::joint_view< boost::mpl::_1, boost::mpl::transform< Sequence, triple_with<boost::mpl::_2> > > > {}; template<typename Sequence1,typename Sequence2,typename Sequence3> struct seq_product : seq_seqpair_product< sequence_product<Sequence1,Sequence2>::type, Sequence3 > {}; typedef boost::mpl::vector<constant, linear, polynomial, cubic_spline> interpolator_types; typedef interpolator_types extrapolator_types; typedef boost::mpl::vector<simpson> integrator_types; typedef seq_product<interpolator_types, extrapolator_types,integrator_types>::type curve_types; struct type_printer { template <typename T> void operator()( T ) { std::cout<< typeid(T).name() <<std::endl; } }; int main() { std::cout<< boost::mpl::size<curve_types>::type::value <<std::endl; boost::mpl::for_each<curve_types>( type_printer() ); }

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Using boost 1.35.0 on Mac OS X with Xcode 3
by Phil Hystad 09 Jun '08

09 Jun '08

I am rebuilding a library that was last compiled a year ago using an earlier version of boost and an earlier version of Xcode (2.4) and an earlier version of Mac OS X (10.4). I downloaded boost_1_35_0 distro for my Mac and built it using the standard configuration and build procedures. That seemed to go OK. I am compiling C++ source code that formerly compiled, without errors or warnings, but now reports the following errors in many files: "error: 'snprintf' is not a member of 'std'" And, the offending line is the following from the c++locale.h file (the error is reported on the line referencing snprintf): #ifdef _GLIBCXX_USE_C99 const int __ret = std::snprintf(__out, __size, __fmt, __prec, __v); #else const int __ret = std::sprintf(__out, __fmt, __prec, __v); #endif Does anyone know the source of this problem. There is absolutely no changes in my source that is being compiled. I am dual posting this on both the boost-users and the Mac Xcode lists because I am not sure which is the more appropriate forum.

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Re: [Boost-users] [iterators][range] size compile failure in 1.35
by Thorsten Ottosen 09 Jun '08

09 Jun '08

Jeff Flinn skrev: > David Abrahams wrote: >> in 1.35 I'm pretty sure that iterator_range<T>::size() only works when T >> is a random access iterator, and filtered iterators are by necessity >> bidirectional. I suggest you use >> >> std::distance(r.begin(), r.end()) >> >> if you're willing to pay for O(N) execution. >> > > Hmm, it looks like that's what iterator_range<T>::size() did in 1.34.1 > while 1.35 returns m_Begin - m_End. Any idea why this was done? boost::distance(r) could also work. I did it as part of the general clean-up of the range lib. size() is expected to be O(1) by users, distance() is not. -Thorsten

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multi-threaded safe circular_buffer
by Selçuk Giray Özdamar 09 Jun '08

09 Jun '08

Hi everyone, I specialized the boost::circular_buffer template class for concurrent access. But I have no idea about how the locking strategy must be for copy ctor, and also assignment operator. I inserted question marks at the end of the related lines. Thanks in advance... template <class T> class CircularBuffer { typedef boost::circular_buffer<T> internal_buffer; typedef boost::shared_mutex ReadWriteMutex; typedef boost::shared_lock<boost::shared_mutex> ReadLock; typedef boost::unique_lock<boost::shared_mutex> WriteLock; public: // Constructors explicit CircularBuffer(capacity_type capacity = 10) : m_capacity(capacity) , m_buffer(capacity) { } // copy ctor CircularBuffer(const CircularBuffer& other) { //WriteLock w_lock(rw_mutex); ??????????? m_capacity = other.m_capacity; m_buffer = other.m_buffer; } size_type size() const { ReadLock r_lock(rw_mutex); return m_buffer.size(); } void push_back(param_value_type item = value_type()) { WriteLock w_lock(rw_mutex); m_buffer.push_back(item); } // assignment operator CircularBuffer& operator= (const CircularBuffer& other) { //WriteLock w_lock(rw_mutex); ?????????? if (this != &other) { m_capacity = other.m_capacity; m_buffer = other.m_buffer; } return *this; } private:// member variables capacity_type m_capacity; internal_buffer m_buffer; // rw_mutex for internal buffer mutable ReadWriteMutex rw_mutex; };

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