August 2008 - Boost-users - lists.preview.boost.org

[exception] RTTI
by Anteru 28 Aug '08

28 Aug '08

Hi, I just upgrade to Boost 1.36, and while I'm not using Boost::exception, it gets included somewhere (gotta investigate that). That's no problem, but as my project does not use RTTI, but Boost::exception does, I'm getting warnings that the typeid() operator is used. Happens at two lines, Q:\Boost\include\boost/exception/exception.hpp(74) : warning C4541: 'typeid' used on polymorphic type 'boost::exception' with /GR-; unpredictable behavior may result Q:\Boost\include\boost/exception/exception.hpp(81) : warning C4541: 'typeid' used on polymorphic type 'boost::exception' with /GR-; unpredictable behavior may result Is there any way to disable this? After all, I'm not using boost::exception specifically, and I don't want to enable RTTI just to get rid of the warning. I'm fine if the diagnostic message becomes garbage then, after all, one usage is just to get the name of the class (typeid(*this).name), which may even return bogus results as typeid is not required to return some meaningful name. Cheers, Anteru

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Visual studio 2003 settings
by Sephiroth 28 Aug '08

28 Aug '08

Hello I'm new to boost and c++. I wanted to know where I can find the settings for Visual Studio 2003. Expecially the linking additional dependencies. Thank for the help Chris

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new user with compile problems
by Brenda Orlin 28 Aug '08

28 Aug '08

I am trying to use Boost version 1.36 with Microsoft Visual Studio 2005. When I try to include the thread library, I get all kinds of compile errors. One example is: Error 1 error C2632: 'float' followed by 'float' is illegal C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\windef.h 155 This does not seem right, however, I don't know what to do about it. Please help! _________________________________________________________________ Get ideas on sharing photos from people like you. Find new ways to share. http://www.windowslive.com/explore/photogallery/posts?ocid=TXT_TAGLM_WL_Pho…

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boost::reference_wrapper & polymorphism
by Robert Dailey 28 Aug '08

28 Aug '08

Does boost::reference_wrapper provide polymorphic behavior? For example, if I have a boost::reference_wrapper to a base type, and I assign a derived type to it, will the function calls be polymorphic?

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[TR1] patch for tr1/detail/config_all.hpp ?
by Williams, Alan B 28 Aug '08

28 Aug '08

Hello, I'm using boost.TR1 in 1.36.0, and found that tr1/detail/config_all.hpp needs a little tweak in order to work with the PGI 7.1.4 compiler. Should I send a proposed diff or patch to this mailing list, or to some individual? Thanks, Alan

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[logging] Milliseconds not logged on Windows
by Allen Cronce 28 Aug '08

28 Aug '08

Hi all, I'm using the latest boost logging library from the sandbox, in conjunction with boost 1.35.0. I'm seeing problems with millisecond strings in the log under Windows VS2005. The following formatter works fine under posix (specifically, Mac OS X): g_log_dbg()->writer().add_formatter( formatter::time("$hh:$mm.$ss. $mili ") ); Here's some sample output: 19:33.54.4196908 hello, world 19:33.54.4197788 this is so cool (but only in the debug build) 1 But the same code running under Windows always outputs a consistent, bogus millisecond value: 18:41.47.-858993460 hello, world 18:41.47.-858993460 this is so cool (but only in the debug build) 1 Looks like a sign extension problem. But I have to admit that I have not invested the time to determine whether this is a bug in the logging library proper, or a problem with the underlying boost 1.35.0 precision time and string utilities used by the logging library. Regardless I can probably live without milliseconds in my Windows logs, so I'll work around it with a platform conditional that specifies an alternate format string under Windows. Best, -- Allen Cronce

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[logging] Build errors under VS2005 Unicode
by Allen Cronce 28 Aug '08

28 Aug '08

Hi all, I'm using the boost logging library from the sandbox, in conjunction with boost 1.35.0. I'm seeing problems building basic sample code under Windows VS2005 in projects where UNICODE and _UNICODE is defined. Here's an example line of problematic code: g_log_err()->writer().add_formatter( formatter::idx(), "[%] " ); Here's the error generated: --snip-- 1>c:\sources\logutils.cpp(56) : error C2664: 'void boost ::logging ::writer ::format_write < formatter_base ,destination_base ,lock_resource ,apply_format_and_write ,router_type ,formatter_array ,destination_array >::add_formatter<boost::logging::formatter::idx_t<>>(formatter,const boost::logging::char_type *)' : cannot convert parameter 2 from 'const char [5]' to 'const boost::logging::char_type *' 1> with 1> [ 1> formatter_base = boost ::logging ::formatter::base<boost::logging::default_,boost::logging::default_>, 1> destination_base = boost ::logging ::destination::base<boost::logging::default_,boost::logging::default_>, 1> lock_resource=boost::logging::lock_resource_finder::single_thread, 1> apply_format_and_write = boost ::logging ::format_and_write ::simple<boost::logging::optimize::cache_string_one_str<>>, 1> router_type=boost::logging::msg_route::simple<boost::logging::formatter::base<boost::logging::default_,boost::logging::default_>,boost::logging::destination::base<boost::logging::default_,boost::logging::default_>,boost::logging::lock_resource_finder::single_thread>, 1> formatter_array = boost ::logging ::array ::shared_ptr_holder < boost ::logging ::formatter ::base < boost ::logging ::default_,boost::logging::default_>,boost::logging::threading::mutex>, 1> destination_array = boost ::logging ::array ::shared_ptr_holder < boost ::logging ::destination ::base < boost ::logging ::default_,boost::logging::default_>,boost::logging::threading::mutex>, 1> formatter=boost::logging::formatter::idx_t<> 1> ] 1> Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 1>c:\sources\logutils.cpp(58) : error C2440: '<function-style-cast>' : cannot convert from 'const char [19]' to 'boost::logging::formatter::time' 1> No constructor could take the source type, or constructor overload resolution was ambiguous 1>c:\sources\logutils.cpp(58) : error C2780: 'void boost ::logging ::writer ::format_write < formatter_base ,destination_base ,lock_resource ,apply_format_and_write ,router_type ,formatter_array,destination_array>::add_formatter(formatter,const boost::logging::char_type *)' : expects 2 arguments - 1 provided 1> with 1> [ 1> formatter_base = boost ::logging ::formatter::base<boost::logging::default_,boost::logging::default_>, 1> destination_base = boost ::logging ::destination::base<boost::logging::default_,boost::logging::default_>, 1> lock_resource=boost::logging::lock_resource_finder::single_thread, 1> apply_format_and_write = boost ::logging ::format_and_write ::simple<boost::logging::optimize::cache_string_one_str<>>, 1> router_type=boost::logging::msg_route::simple<boost::logging::formatter::base<boost::logging::default_,boost::logging::default_>,boost::logging::destination::base<boost::logging::default_,boost::logging::default_>,boost::logging::lock_resource_finder::single_thread>, 1> formatter_array = boost ::logging ::array ::shared_ptr_holder < boost ::logging ::formatter ::base < boost ::logging ::default_,boost::logging::default_>,boost::logging::threading::mutex>, 1> destination_array = boost ::logging ::array ::shared_ptr_holder < boost ::logging ::destination ::base < boost ::logging ::default_,boost::logging::default_>,boost::logging::threading::mutex> 1> ] 1> c:\sources\thirdpartylibs\installedwin32\individual\boost \include\boost\logging\detail\format_write_detail.hpp(232) : see declaration of 'boost ::logging ::writer ::format_write < formatter_base ,destination_base ,lock_resource ,apply_format_and_write ,router_type,formatter_array,destination_array>::add_formatter' 1> with 1> [ 1> formatter_base = boost ::logging ::formatter::base<boost::logging::default_,boost::logging::default_>, 1> destination_base = boost ::logging ::destination::base<boost::logging::default_,boost::logging::default_>, 1> lock_resource=boost::logging::lock_resource_finder::single_thread, 1> apply_format_and_write = boost ::logging ::format_and_write ::simple<boost::logging::optimize::cache_string_one_str<>>, 1> router_type=boost::logging::msg_route::simple<boost::logging::formatter::base<boost::logging::default_,boost::logging::default_>,boost::logging::destination::base<boost::logging::default_,boost::logging::default_>,boost::logging::lock_resource_finder::single_thread>, 1> formatter_array = boost ::logging ::array ::shared_ptr_holder < boost ::logging ::formatter ::base < boost ::logging ::default_,boost::logging::default_>,boost::logging::threading::mutex>, 1> destination_array = boost ::logging ::array ::shared_ptr_holder < boost ::logging ::destination ::base < boost ::logging ::default_,boost::logging::default_>,boost::logging::threading::mutex> 1> ] --snip-- According to the documentation, the library should automatically sense the UNICODE definition under Windows and do the right thing. But that doesn't seem to work right. I played around with trying to get this to work, but found that I had to always pass non-wide strings to the various interfaces. Ultimately I gave up and disabled the logging of wide character strings by defining the following: #define BOOST_LOG_DONOT_USE_WCHAR_T For my particular needs, logging 8 bit characters probably makes more sense anyway. But it's somewhat bothersome that the logging library did not work out of the box as documented. Sorry in advance if I missed some other configuration or nuance needed to get the logging library to work under UNICODE. Best, -- Allen Cronce

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Boost.Log database backends
by Mika Heiskanen 28 Aug '08

28 Aug '08

Hi, Does anyone know if there is a database backend available for Boost.Log? I couldn't find any matches from Google with any sensible keyword combinations. --> Mika Heiskanen / Finnish Meteorological Insititute

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[date_time]: Easter calculation
by Jean-Pierre Bergamin 28 Aug '08

28 Aug '08

Dear Boost-Users Is there a year_based_generator for easter dates somewhere lying around, waiting to be used by others? Thanks James

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Boost at Dev-Cpp 5 (Windows XP)
by Berno Wiegel 28 Aug '08

28 Aug '08

Hello all, I have problems with installing Boost. I downloaded boost_1_36_0.zip and extract it to c:\boost\. After that I downloaded boost-jam-3.1.16-1-ntx86(2).zip and extract bjam.exe to c:\boost\boost_1_36_0\. Now I start cmd and goes to c:\boost\boost_1_36_0\! There I execut bjam with following parameters bjam.exe "-sMINGW_ROOT_DIRECTORY=C:\Dev-Cpp" "-sTOOLS=mingw" install This is my Console: C:\BOOST\boost_1_36_0>bjam.exe "-sMINGW_ROOT_DIRECTORY=C:\Dev-Cpp" "-sTOOLS=min w" install warning: Graph library does not contain optional GraphML reader. note: to enable GraphML support, set EXPAT_INCLUDE and EXPAT_LIBPATH to the note: directories containing the Expat headers and libraries, respectively. warning: skipping optional Message Passing Interface (MPI) library. note: to enable MPI support, add "using mpi ;" to user-config.jam. note: to suppress this message, pass "--without-mpi" to bjam. note: otherwise, you can safely ignore this message. WARNING: No python installation configured and autoconfiguration failed. See http://www.boost.org/libs/python/doc/building.html for configuration instructions or pass --without-python to suppress this message and silently skip all Boost.Python targets Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (don't panic: this is a strictly optional feature). warning: No toolsets are configured. warning: Configuring default toolset "msvc". warning: If the default is wrong, your build may not work correctly. warning: Use the "--toolset=xxxxx" option to override our guess. warning: For more configuration options, please consult warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.htm C:/BOOST/boost_1_36_0/tools/build/v2/tools\msvc.jam:320: in configure-really *** argument error * rule path.make ( native ) * called with: ( ) * missing argument native C:/BOOST/boost_1_36_0/tools/build/v2/util\path.jam:44:see definition of rule 'm ke' being called C:/BOOST/boost_1_36_0/tools/build/v2/tools\msvc.jam:172: in configure C:/BOOST/boost_1_36_0/tools/build/v2/tools\msvc.jam:145: in msvc.init C:/BOOST/boost_1_36_0/tools/build/v2/build\toolset.jam:38: in toolset.using C:/BOOST/boost_1_36_0/tools/build/v2\build-system.jam:553: in load C:\BOOST\boost_1_36_0\tools\build\v2/kernel\modules.jam:281: in import C:\BOOST\boost_1_36_0\tools\build\v2/kernel/bootstrap.jam:128: in boost-build C:\BOOST\boost_1_36_0\boost-build.jam:16: in module scope C:\BOOST\boost_1_36_0> I followed this guide (http://wagjo.com/index.php?id=27) It is espacially for Dev-Cpp users, but ther is no installation. I dont know what to do. Please help me.

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