March 2005 - Boost-users - lists.preview.boost.org

boost::mpl::transform
by Lemings, Eric B. (Contr) 05 Apr '05

05 Apr '05

What is the result type of transform if the algorithm is given two sequences of different sizes? Thanks, Eric.

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C++ Template Metaprogramming -- EX 2.1
by Kelly Burkhart 04 Apr '05

04 Apr '05

I'm going through the excercises in this book and am stumped on the second one I tried. Does anyone have a hint on how to approach this problem? TIA, -K

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1_32 compiling xml_grammer
by Jeremy Jurksztowicz 02 Apr '05

02 Apr '05

Hi, I am having problems compiling 1_32 on a G4 darwin system with GCC 3.x. 1_31 compiles fine, but when I the xml_grammer.o is being compiled in 1_32, it seems to take forever... as in forever. My computer seems to be doing things but I wonder if a modern processor should take over 4 hours to compile 1 lousy object file. That is how long I have left the compiler running for, 4 hours, still churning away at xml_grammer.o. Is it normal for xml_grammer to take a long time to compile? Nothing in xml_grammer.hpp (and xml_grammer.ipp) indicates that it should take so long. Perhaps it is my bjam build? I am using the bjam I installed with 1_31 to compile 1_32. Thanks, Jeremy Jurksztowicz

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mingw and boost
by Srinivasan, Rajagopalan (GE Healthcare) 01 Apr '05

01 Apr '05

all, i have mingw g++ version 3.4.2 i got boost compiled and installed on c:\Boost my simple app does not link. Error Message is - C:/DOCUME~1/208004~1/LOCALS~1/Temp/ccK6caaa.o(.text$_ZN5boost15program_options16validation_errorC1ERKSs[boost::program_options::validation_error::validation_error(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)]+0x53):hello.cpp: variable 'vtable for boost::program_options::validation_error' can't be auto-imported. Please read the documentation for ld's --enable-auto-import for details. I cannot seem to find such a switch for ld. also - I am using make. should i be using jam (or bjam?) for my app. If these are in addressed some FAQ please point me. regards srini DISCLAIMER: This e-mail and any attachment is intended only for the exclusive and confidential use of the addressee(s). If you are not the intended recipient, any use, interference with, disclosure or copying of this material is unauthorised and prohibited. If you have received this message in error, please notify the sender by return e-mail immediately and delete the message from your computer without making any copies. Please see http://www.ge.com.au/help/email_privacy_policy.html for information about our privacy practices.

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Directed graphs in Graph Library
by Dimitris Xochelis 01 Apr '05

01 Apr '05

Hi list, I am very interested in the graph library, which I am planning to use quite soon. My biggest concern is whether Graph Library can help me to find a minimum spanning tree in an *directed* graph with weighted edges. I know that for undirected graphs I can use either the Kruskal's algorithm or the Prim's algorithm, that Graph Library already provides. But what if I need to work with directed graphs? Please note (in case it helps): The problem that I am trying to solve does not require the use of weighted edges actually, I only need to enforce some constrains, giving absolute priority to some (directed) edges. I could just as well use Boolean flags instead of weights. Thanks in advance, Jim Xochellis This email 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 email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail.

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RE: boost::mpl::transform
by Lemings, Eric B. (Contr) 31 Mar '05

31 Mar '05

I just wrote a quick and dirty test. #include <boost/mpl/vector_c.hpp> namespace mpl = boost::mpl; typedef mpl::vector_c< int, 1,8,0,-2,4 > t1; typedef mpl::vector_c< int, 7,-3,8,0 > t2; // Causes compile error: Passes mpl::void_ type to mpl::plus. //typedef mpl::transform< t1, t2, mpl::plus< _1, _2 > > r; namespace my { template < typename T1, typename T2 > struct plus: mpl::plus< T1, T2 > { }; template < > struct plus< mpl::void_, T > { typedef T type; }; template < > struct plus< T, mpl::void_ > { typedef T type; }; } typedef mpl::transform< t1, t2, my::plus< _1, _2 > > r; Got the following compile error: The class "boost::mpl::vector5<mpl_::integral_c<int, 7>, ..., mpl_::integral_c<int,0>>" has no member "item5". For what it's worth. Eric. > -----Original Message----- > From: Lemings, Eric B. (Contr) > Sent: Thursday, March 31, 2005 4:10 PM > To: 'boost-users(a)lists.boost.org' > Subject: boost::mpl::transform > > > > What is the result type of transform if the algorithm is > given two sequences of different sizes? > > Thanks, > Eric. >

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Re: [Boost-users] Link error Boost.Serialization
by Christian Heinemann 31 Mar '05

31 Mar '05

boost-users(a)lists.boost.org schrieb am 31.03.05 04:11:12: > > On Wed, 30 Mar 2005 13:06:32 +0100, Christian Heinemann wrote > > Hi, > > i want to use serialization library from boost. I'm enthused about > > the functionality. But when i try to compile and link the first > > example (which can be find on > > http://www.boost.org/libs/serialization/doc/index.html) i get the > > following error messages: > > (with g++ -o serialize serialize.cpp -lboost_serialization-gcc > > -I/usr/local/include/boost-1_32) > > It doesn't look like you've told the compiler where to find the serialization > library. You probably need the option: > > -L /usr/local/lib > > assuming that's where the serialization library is installed. I found out that "gcc -o serialize serialize.cpp -lboost_serialization-gcc-d -I/usr/local/include/boost-1_32 -lboost_thread-gcc-mt" works. Exist there a special reason why i should use "boost_serialization-gcc-d" instead of "lboost_serialization-gcc" ? Christian ______________________________________________________________ Verschicken Sie romantische, coole und witzige Bilder per SMS! Jetzt bei WEB.DE FreeMail: http://f.web.de/?mc=021193

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boost and STLport using VC++ 7.1
by Oleg Smolsky 31 Mar '05

31 Mar '05

Hello, I'm trying to build boost using VC++ 7.1 against STLport 5.0 rc2. The very first library that is built is boost_date_time.dll and the compiler chokes on greg_month.cpp. The full bjam output is at the end of the message. Some background info, that may be useful: - I can successfully build boost without STLport using this this command: bjam "-sTOOLS=vc-7_1" "-sBUILD=debug release <runtime-link>dynamic <threading>multi" --prefix=..\boost --builddir=..\boost-obj install - when using STLport I build using: bjam "-sTOOLS=vc-7_1-stlport" "-sSTLPORT_PATH=..\STLport\stlport" "-sBUILD=debug release <runtime-link>dynamic <threading>multi" --prefix=..\boost --builddir=..\boost-obj install - if I let the building process continue, it builds about 60% of all libraries - I need to use STLport5 because it supports VC++ 7.1 out of the box - I've tried building CVS/HEAD version of boost as well as the latest released version 1.32 So, has anybody tried building this combination? Thanks in advance. Here is the full output. Oleg. vc-C++ ..\boost-obj\bin\boost\libs\date_time\build\boost_date_time.dll\vc-7_1-st lport\debug\threading-multi\greg_month.obj greg_month.cpp C:\testing\boost-cvs\boost\lexical_cast.hpp(150) : error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'boost::date_time::date _names_put<Config,charT,OutputIterator>::string_type' (or there is no acceptable conversion) with [ Config=boost::gregorian::greg_facet_config, charT=wchar_t, OutputIterator=std::ostreambuf_iterator<wchar_t,std::char_traits<wch ar_t>> ] C:\testing\boost-cvs\boost\lexical_cast.hpp(189) : see reference to func tion template instantiation 'bool boost::detail::lexical_stream<Target,Source>:: operator >><Target>(InputStreamable &)' being compiled with [ Target=boost::date_time::date_names_put<boost::gregorian::greg_facet _config,wchar_t,std::ostreambuf_iterator<wchar_t,std::char_traits<wchar_t>>>::st ring_type, Source=const char *, InputStreamable=boost::date_time::date_names_put<boost::gregorian::g reg_facet_config,wchar_t,std::ostreambuf_iterator<wchar_t,std::char_traits<wchar _t>>>::string_type ] C:\testing\boost-cvs\boost\date_time\date_names_put.hpp(131) : see refer ence to function template instantiation 'Target boost::lexical_cast<boost::date_ time::date_names_put<Config,charT,OutputIterator>::string_type,const char*>(Sour ce)' being compiled with [ Target=boost::date_time::date_names_put<boost::gregorian::greg_facet _config,wchar_t,std::ostreambuf_iterator<wchar_t,std::char_traits<wchar_t>>>::st ring_type, Config=boost::gregorian::greg_facet_config, charT=wchar_t, OutputIterator=std::ostreambuf_iterator<wchar_t,std::char_traits<wch ar_t>>, Source=const char * ] C:\testing\boost-cvs\boost\date_time\date_names_put.hpp(127) : while com piling class-template member function 'void boost::date_time::date_names_put<Con fig,charT,OutputIterator>::do_put_special_value(boost::date_time::date_names_put <Config,charT,OutputIterator>::iter_type &,boost::date_time::date_names_put<Conf ig,charT,OutputIterator>::special_value_enum) const' with [ Config=boost::gregorian::greg_facet_config, charT=wchar_t, OutputIterator=std::ostreambuf_iterator<wchar_t,std::char_traits<wch ar_t>> ] C:\testing\boost-cvs\boost\date_time\date_names_put.hpp(213) : see refer ence to class template instantiation 'boost::date_time::date_names_put<Config,ch arT,OutputIterator>' being compiled with [ Config=boost::gregorian::greg_facet_config, charT=wchar_t, OutputIterator=std::ostreambuf_iterator<wchar_t,std::char_traits<wch ar_t>> ] C:\testing\boost-cvs\libs\date_time\build\../src\gregorian\greg_month.cp p(129) : see reference to class template instantiation 'boost::date_time::all_da te_names_put<Config,charT>' being compiled with [ Config=boost::gregorian::greg_facet_config, charT=wchar_t ] C:\testing\boost-cvs\boost\lexical_cast.hpp(150) : error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'boost::date_time::date _names_put<Config,charT,OutputIterator>::string_type' (or there is no acceptable conversion) with [ Config=boost::gregorian::greg_facet_config, charT=wchar_t, OutputIterator=std::ostreambuf_iterator<wchar_t,std::char_traits<wch ar_t>> ] C:\testing\boost-cvs\boost\lexical_cast.hpp(189) : see reference to func tion template instantiation 'bool boost::detail::lexical_stream<Target,Source>:: operator >><Target>(InputStreamable &)' being compiled with [ Target=boost::date_time::date_names_put<boost::gregorian::greg_facet _config,wchar_t,std::ostreambuf_iterator<wchar_t,std::char_traits<wchar_t>>>::st ring_type, Source=const unsigned short *, InputStreamable=boost::date_time::date_names_put<boost::gregorian::g reg_facet_config,wchar_t,std::ostreambuf_iterator<wchar_t,std::char_traits<wchar _t>>>::string_type ] C:\testing\boost-cvs\boost\date_time\date_names_put.hpp(189) : see refer ence to function template instantiation 'Target boost::lexical_cast<boost::date_ time::date_names_put<Config,charT,OutputIterator>::string_type,const charT*>(Sou rce)' being compiled with [ Target=boost::date_time::date_names_put<boost::gregorian::greg_facet _config,wchar_t,std::ostreambuf_iterator<wchar_t,std::char_traits<wchar_t>>>::st ring_type, Config=boost::gregorian::greg_facet_config, charT=wchar_t, OutputIterator=std::ostreambuf_iterator<wchar_t,std::char_traits<wch ar_t>>, Source=const wchar_t * ] C:\testing\boost-cvs\boost\date_time\date_names_put.hpp(188) : while com piling class-template member function 'void boost::date_time::date_names_put<Con fig,charT,OutputIterator>::put_string(boost::date_time::date_names_put<Config,ch arT,OutputIterator>::iter_type &,const charT *const ) const' with [ Config=boost::gregorian::greg_facet_config, charT=wchar_t, OutputIterator=std::ostreambuf_iterator<wchar_t,std::char_traits<wch ar_t>> ] "cl" /Zm800 -nologo /EHsc -c -DBOOST_ALL_DYN_LINK=1 -DUSE_DATE_TIME_PRE_1_ 33_FACET_IO -D_STLP_DEBUG=1 -D_STLP_DEBUG_UNINITIALIZED=1 -D_STLP_USE_DYNAMIC_LI B=1 /Z7 /Od /Ob0 /EHsc /GR /MDd /Op /Zc:forScope -I"..\boost-obj\bin\boost\li bs\date_time\build" -I"..\STLport\stlport\STLport-4.6.2\stlport" -I"C:\testing \boost-cvs" -Fo"..\boost-obj\bin\boost\libs\date_time\build\boost_date_time.dl l\vc-7_1-stlport\debug\threading-multi\greg_month.obj" -Tp"C:\testing\boost-cvs \libs\date_time\build\../src/gregorian/greg_month.cpp" ...failed vc-C++ ..\boost-obj\bin\boost\libs\date_time\build\boost_date_time.dll \vc-7_1-stlport\debug\threading-multi\greg_month.obj...

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Cross compiling boost for Embedded Planet ppc_82xx question
by Brad Cox 31 Mar '05

31 Mar '05

I'm trying to cross-compile boost for the Embedded Planet PowerPC 82xx target platform and have a few questions. This is the first time I've used jam so I'm a bit disoriented. Can somebody help? The build platform is a vanilla Redhat 9 system for which the target processor vendor provides a cross-compiler (ppc_82xx_gcc). This is a modified version of gcc that builds applications to run under their Linux kernel/application environment, supplied as a collection of rpm images. These are installed on the host file system and exported to the target platform via NFS. All this is in place now and apparently is working, at least insofar as having compiled ACE/TAO successfully (as yet untested). Question is, how do I compile boost for this platform? I've copied tools/build/v1/gcc-tools.jam to tools/build/v1/ppc_82xx-tools.jam and changed the GCC/GXX settings in that file to ppc_82xx-gcc and ppc_82xx-g++ respectively, which is all that should be needed insofar as their compiler is concerned. Here's what I'm getting: jam needs to be told the target architecture somehow. Question is, how do I do this? /usr/local/tena-tools/i686-pc-linux-gnu/bin/bjam --prefix="/usr/local/boost/1.31.0/rh9-gcc322-ppc82xx-d" --builddir="/usr/local/boost/1.31.0/rh9-gcc322-ppc82xx-d/build" -sTOOLS="ppc_82xx-gcc" -sBUILD="debug <runtime-link>dynamic <threading>multi" -sGXX="ppc_82xx-gcc" -sGCC="ppc_82xx-gcc" install/usr/local/tena-tools/i686-pc-linux-gnu/bin/bjam --prefix="/usr/local/boost/1.31.0/rh9-gcc322-ppc82xx-d" --builddir="/usr/local/boost/1.31.0/rh9-gcc322-ppc82xx-d/build" -sTOOLS="ppc_82xx-gcc" -sBUILD="debug <runtime-link>dynamic <threading>multi" -sGXX="ppc_82xx-gcc" -sGCC="ppc_82xx-gcc" install/usr/local/tena-tools/i686-pc-linux-gnu/bin/bjam --prefix="/usr/local/boost/1.31.0/rh9-gcc322-ppc82xx-d" --builddir="/usr/local/boost/1.31.0/rh9-gcc322-ppc82xx-d/build" -sTOOLS="ppc_82xx-gcc" -sBUILD="debug <runtime-link>dynamic <threading>multi" -sGXX="ppc_82xx-gcc" -sGCC="ppc_82xx-gcc" install ...found 8259 targets... ...updating 226 targets... MkDir1 /usr/local/boost/1.31.0/rh9-gcc322-ppc82xx-d/build/bin/boost/libs/python/build/libboost_python.so/ppc_82xx-gcc/debug/shared-linkable-true/threading-multi gcc-C++-action /usr/local/boost/1.31.0/rh9-gcc322-ppc82xx-d/build/bin/boost/libs/python/build/libboost_python.so/ppc_82xx-gcc/debug/shared-linkable-true/threading-multi/numeric.o /usr/bin/objcopy: Warning: Output file cannot represent architecture UNKNOWN! gcc-C++-action /usr/local/boost/1.31.0/rh9-gcc322-ppc82xx-d/build/bin/boost/libs/python/build/libboost_python.so/ppc_82xx-gcc/debug/shared-linkable-true/threading-multi/list.o /usr/bin/objcopy: Warning: Output file cannot represent architecture UNKNOWN!

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Boost::test, expected failures with BOOST_AUTO_UNIT_TEST?
by Dave Steffen 31 Mar '05

31 Mar '05

Hi folks, I'm developing a (better) unit test framework for our code; I am very attracted to the simplicity of the BOOST_AUTO_UNIT_TEST framework, but would like to use the "expected failures" feature that is, apparently, only available with the explicit use of the test suite. That is to say: if I explicitly write the init_unit_test_suite function, I add unit tests thusly: test->add( BOOST_TEST_CASE( &mytest), 1 ); with second parameter indicating how many expected failures. However, there is no way to do so using the AUTO framework: BOOST_AUTO_UNIT_TEST( testINFO ) // no second parameter! Is there any way for me to use the AUTO_TEST framework and still indicate expected failures? Thanks! ---------------------------------------------------------------------- Dave Steffen, Ph.D. "Irrationality is the square root of all evil" Numerica Corporation -- Douglas Hofstadter Software Engineer IV "Oppernockity tunes but once." -- anon.

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