June 2008 - Boost-users - lists.boost.org

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/

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