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[units] Unable to print temperature quantity
by Belcourt, K. Noel 30 Nov '11

30 Nov '11

Hi, I'm a complete neophyte with the units library. I have cause to use it so I'm trying to do something simple and am getting compile problems. This code: #include <iostream> #include <boost/units/io.hpp> #include <boost/units/quantity.hpp> #include <boost/units/systems/temperature/fahrenheit.hpp> int main(int, char **) { using namespace boost::units; quantity<fahrenheit::temperature> t; std::cout << t << std::endl; return 0; } Generates this error with Intel 11.1 on Darwin using trunk. /Users/kbelco/boost/boost/units/io.hpp(967): error: more than one instance of overloaded function "boost::units::detail::do_print_prefixed" matches the argument list: function template "void boost ::units ::detail ::do_print_prefixed <Prefixes,CharT,Traits,Dimension,System,T>(std::basic_ostream<_CharT, _Traits> &, const boost::units::quantity<boost::units::unit<Dimension, System, void>, T> &)" function template "void boost ::units ::detail ::do_print_prefixed <Prefixes,CharT,Traits,Unit,T>(std::basic_ostream<_CharT, _Traits> &, const boost::units::quantity<Unit, T> &)" argument types are: (std::basic_ostream<char, std::char_traits<char>>, const boost::units::quantity<boost::units::fahrenheit::temperature, double>) detail::do_print_prefixed<Prefixes>(os, q); ^ detected during: instantiation of "void boost ::units ::detail ::maybe_print_prefixed <Prefixes,CharT,Traits,Unit,T>(std::basic_ostream<_CharT, _Traits> &, const boost::units::quantity<Unit, T> &, boost::mpl::true_) [with Prefixes=boost::units::detail::engineering_prefixes, CharT=char, Traits=std::char_traits<char>, Unit=boost::units::fahrenheit::temperature, T=double]" at line 1050 instantiation of "std::basic_ostream<_CharT, _Traits> &boost::units::operator<<(std::basic_ostream<_CharT, _Traits> &, const boost::units::quantity<Unit2, T2> &) [with Char=char, Traits=std::char_traits<char>, Unit=boost::units::fahrenheit::temperature, T=double]" at line 14 of "/ Users/kbelco/core_simulator/test/integration/main_test_5.cpp" Any ideas what I'm doing wrong? Thanks. -- Noel Belcourt

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[spirit-karma] skipping tokens while generation
by Ovanes Markarian 30 Nov '11

30 Nov '11

Hello *, I am somehow stuck when trying to skip tokens to be generated. My configuration is boost 1.47 and visual c++ 2010. I also do not understand how some mechanics are intended to work. Example 1: Lets say I have a string: /// And I want my generator to generate: / from it or if the string is not '///' leave it as it is. So I wrote: using namespace std; string result; typedef std::back_insert_iterator<string> oiter_t; oiter_t out(result); string input = "///"; namespace k=karma; k::generate(out, &k::string("///") << "/" | k::string, input); And that works fine. Example 2: Now I would like to the slash to be a dynamic part, so I go ahead and define a rule: string root("/"); k::rule<oiter_t, std::string()> repeating_slash = +k::lit(root); k::generate(out, &repeating_slash << "/" | k::string, input); Here the generate never returns (infinite loop???).... Next test: Example 3: use in the rule instead of k::lit a k::string. This does not compile. Why? I was going through the docs over and over again but somehow I miss smth. Many thanks, Ovanes

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Re: [Boost-users] [Gil] TIFF file with mixed 8/16 bit channel
by Corinna Kinchin 30 Nov '11

30 Nov '11

Hey Christian, Many thanks for your response, good luck with the fix and it would be marvellous if you are able to keep us posted on progress ... Meanwhile I have another TIFF file to hand (also generated by Photoshop) which has these characteristics: Colorspace: CMYK Depth: 16-bit Channel depth: cyan: 16-bit magenta: 16-bit yellow: 16-bit black: 15-bit alpha: 16-bit Let me know if you'd like a copy to test with. All the best, Corinna ... Corinna Kinchin email: ckinchin(a)datazone.com Datazone Ltd. Tel: +353 64 66 28964 Palm Gate, Greenane, Fax: +353 64 66 28965 Killarney, Co. Kerry, Ireland URL: http://www.miramo.com Datazone - makers of `Miramo', the automated publishing tool > > Hi Corinna, > > I have been busy trying to load your picture but some internals of the > tiff reader doesn't allow for that right now. Hopefully I can fix > soon. > > > I'm just downloading the latest boost version (am using 1.42 at the moment > > which doesn't seem to have the cymk16161688_image_t you refer to) > > and will try out your suggestion. > > You have to build such image type. Here is how you do it: > > typedef bit_aligned_image5_type< 16, 16, 16, 8, 8, cmyka_layout_t > >::type image_t; > > > > > And this is almost certainly an RTFM question but how does one know > > which input image type to use? If you had a moment to point me in > > the right direction or to jot down an elegant code snippet to get > > me on the right track for reading different flavours of TIFF files > > I'd be eternally grateful ... > > You could use a dynamic_image. See the dynamic_image extension. > > Regards, > Christian > >

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Spirit: assertion fails under Windows but not Linux
by Gaël de Chalendar 30 Nov '11

30 Nov '11

Hello, The code below fails under Windows with the following message (sorry in French, I don't know how to force Visual C++ to work in English). This is under Windows. It works under Linux I use Boost 1.47 with cmake and Visual C++ 2008 uner Windows and Boost 1.46 and gcc 4.6.1 under Linux. The assertion in boost grammar.hpp is accompanied by this comment: // If you see the assertion below failing then the start rule // passed to the constructor of the grammar is not compatible with // the grammar (i.e. it uses different template parameters). but I don't understand how to interpret it in my case... Any idea ? Regards, Gaël Code: typedef BOOST_TYPEOF(skipper) skipper_type; template <typename Iterator> struct charchart_parser : qi::grammar<Iterator, charchart(), skipper_type> { charchart_parser() : charchart_parser::base_type(start) { using qi::eps; using qi::lit; using qi::_val; using qi::_1; using ascii::char_; using ascii::space_type; using qi::lexeme; using qi::alnum; using qi::hex; using qi::eol; start %= classes >> chars ; <OTHER GRAMMAR RULES> } qi::rule<Iterator, charchart(), skipper_type> start; <OTHER RULES DECLARATIONS> }; Messages: C:\PROGRA~1\boost\BOOST_~1\boost/spirit/home/qi/nonterminal/grammar.hpp(77) : error C2664: 'boost::mpl::assertion_failed'ÿ: impossible de convertir le paramŠtre 1 de 'boost::mpl::failed ************(__thiscall boost::spirit::qi::grammar<Iterator,T1,T2>::{ctor}::incompatible_start_rule::* ***********) (boost::spirit::qi::rule<Iterator,T1,boost::spirit::qi::alternative<Elements>>)' en 'boost::mpl::assert<false>::type' with [ Iterator=iterator_type, T1=FrCeaLic2m::LinguisticProcessing::FlatTokenizer::charchart (void), T2=FrCeaLic2m::LinguisticProcessing::FlatTokenizer::skipper_type, Elements=boost::fusion::cons<boost::spirit::qi::char_class<boost::spirit::tag::char_code<boost::spirit::tag::space,boost::spirit::char_encoding::standard>>,boost::fusion::cons<boost::spirit::qi::sequence<boost::fusion::cons<boost::spirit::qi::literal_char<boost::spirit::char_encoding::standard,true,false>,boost::fusion::cons<boost::spirit::qi::kleene<boost::spirit::qi::difference<boost::spirit::qi::char_class<boost::spirit::tag::char_code<boost::spirit::tag::char_,boost::spirit::char_encoding::ascii>>,boost::spirit::qi::eol_parser>>,boost::fusion::cons<boost::spirit::qi::eol_parser,boost::fusion::nil>>>>,boost::fusion::nil>> ] Aucun constructeur n'a pu prendre le type de source, ou la r‚solution de la surcharge du constructeur ‚tait ambigu‰ z: \projets\moteurmultimedia\mm_linguisticprocessing\src\linguisticprocessing\core\flattokenizer\SpiritCharChartParser.hpp(132)ÿ: voir la r‚f‚rence … l'instanciation de la fonction modŠle 'boost::spirit::qi::grammar<Iterator,T1,T2>::grammar<Iterator,FrCeaLic2m::LinguisticProcessing::FlatTokenizer::charchart(void),boost::spirit::qi::alternative<Elements>,boost::spirit::unused_type,boost::spirit::unused_type>(const boost::spirit::qi::rule<Iterator,T1,boost::spirit::qi::alternative<Elements>> &,const std::string &)' en cours de compilation with [ Iterator=iterator_type, T1=FrCeaLic2m::LinguisticProcessing::FlatTokenizer::charchart (void), T2=FrCeaLic2m::LinguisticProcessing::FlatTokenizer::skipper_type, Elements=boost::fusion::cons<boost::spirit::qi::char_class<boost::spirit::tag::char_code<boost::spirit::tag::space,boost::spirit::char_encoding::standard>>,boost::fusion::cons<boost::spirit::qi::sequence<boost::fusion::cons<boost::spirit::qi::literal_char<boost::spirit::char_encoding::standard,true,false>,boost::fusion::cons<boost::spirit::qi::kleene<boost::spirit::qi::difference<boost::spirit::qi::char_class<boost::spirit::tag::char_code<boost::spirit::tag::char_,boost::spirit::char_encoding::ascii>>,boost::spirit::qi::eol_parser>>,boost::fusion::cons<boost::spirit::qi::eol_parser,boost::fusion::nil>>>>,boost::fusion::nil>> ] z: \projets\moteurmultimedia\mm_linguisticprocessing\src\linguisticprocessing\core\flattokenizer\SpiritCharChartParser.hpp(131)ÿ: lors de la compilation de la fonction membre '<Inconnu>' de la classe <Inconnu> Z: \Projets\MoteurMultimedia\mm_linguisticprocessing\src\linguisticProcessing\core\FlatTokenizer\CharChart.cpp(303)ÿ: voir la r‚f‚rence … l'instanciation de la classe modŠle 'FrCeaLic2m::LinguisticProcessing::FlatTokenizer::charchart_parser<Iterator>' en cours de compilation with [ Iterator=iterator_type ] -- Gael de Chalendar CEA LIST Centre de Fontenay-aux-Roses Laboratoire Vision et Ingénierie des Contenus (Vision and Content Engineering Laboratory) Bat. 38-2 ; 18, rue du Panorama ; BP 6 92265 Fontenay aux Roses Cedex ; France Tél.:01.46.54.80.18 ; Fax.:01.46.54.75.80 Email : Gael.D.O.T.de-Chalendar.A(a)T.cea.D.O.T.fr

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Manipulating boost::multi_array
by kelvSYC 30 Nov '11

30 Nov '11

Right now, I'm using boost::multi_array for implementing a dynamic-sized matrix for an algorithm in which the number of rows and columns therein may wildly fluctuate (is boost::multi_array even the right class for this?). What's frustrating me is how I can do any and all of the following: 1. Remove a single row or column from a matrix 2. Insert a single row or column to a matrix 3. Augment two matrices together 4. Swap two rows or columns Is there any way to do the first three without calling resize() and moving the elements around manually? For the last, does something like std::swap(A[row1], A[row2]) work?

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[numeric] Errors compiling using gcc 4.6.2 on Solaris 10/SPARC
by Ioannis Papadopoulos 29 Nov '11

29 Nov '11

Hi, I'm compiling Boost 1.48 on Solaris 10/gcc 4.6.2 for 32-bit and I use the following in my project-config.jam (it doesn't compile otherwise): using gcc : : : <compileflags>-mcpu=v9 <linkflags>-mcpu=v9 ; I am getting the following errors in numeric: ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:25:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:13:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:158:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:13:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:170:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:13:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:182:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, unsigned char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:37:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, unsigned char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:194:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, short int>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:49:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, short int>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:206:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, short unsigned int>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:61:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, short unsigned int>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:218:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, int>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:73:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, int>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:230:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, unsigned int>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:85:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, unsigned int>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:242:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, long long int>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:97:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, long long int>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:254:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, long long unsigned int>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:109:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, long long unsigned int>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:266:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, float>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:121:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, float>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:278:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, double>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:133:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, double>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:290:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<char, long double>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:145:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<char, long double>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:315:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<unsigned char, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:303:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<unsigned char, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:460:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<short int, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:448:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<short int, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:605:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<short unsigned int, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:593:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<short unsigned int, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:750:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<int, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:738:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<int, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:895:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<unsigned int, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:883:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<unsigned int, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:1040:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<long long int, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:1028:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<long long int, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:1185:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<long long unsigned int, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:1173:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<long long unsigned int, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:1330:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<float, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:1318:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<float, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:1475:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<double, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:1463:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<double, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:1620:12: error: redefinition of 'struct boost::numeric::numeric_cast_traits<long double, char>' ./boost/numeric/conversion/detail/preprocessed/numeric_cast_traits.hpp:1608:12: error: previous definition of 'struct boost::numeric::numeric_cast_traits<long double, char>' I guess it cannot tell apart int8_t and char.

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[lambda & range] bind for transformed - how to do it.
by Robert Jones 29 Nov '11

29 Nov '11

In this code (fabricated) sequence, ages_by_bind compiles, but ages_by_lambda does not. I believe this is because the lambda version does not publish result_type to its resultant functors, since the increased generality of lambda makes this difficult or impossible to do. Is there any way I can get round this, as it currently makes the lambda/transformed combination completely unusable AFAICS. Thx, - Rob. #include <map> #include <vector> #include <string> #include <boost/bind.hpp> #include <boost/range.hpp> #include <boost/range/adaptor/transformed.hpp> #include <boost/range/algorithm_ext/push_back.hpp> #include <boost/lambda/lambda.hpp> #include <boost/lambda/bind.hpp> std::vector<int> ages_by_bind( const std::map<std::string, int> & people ) { using boost::adaptors::transformed; std::vector<int> result; boost::range::push_back( result, people | transformed( bind( & std::map<std::string, int>::value_type::second, _1 ) ) ); return result; } std::vector<int> ages_by_lambda( const std::map<std::string, int> & people ) { using boost::adaptors::transformed; namespace ll = boost::lambda; std::vector<int> result; boost::range::push_back( result, people | transformed( ll::bind( & std::map<std::string, int>::value_type::second, ll::_1 ) ) ); return result; }

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BGL with MPI
by Neiderer, Andrew M USA CIV (US) 29 Nov '11

29 Nov '11

I have libs/graph/example's working fine under RH in boost_1_48_0. But cannot get MPI working with BGL, e.g. libs/mpi/example/hello_world.cpp :-( When I translate using $g++ -I .../boost_1_48_0 -I .../boost_1_48_0/boost/mpi hello_world.cpp I get a bunch of errors, the first of which boost/mpi/config.hpp cannot find mpi.h. Not even sure where mpi.h is located and how it differs from mpi.hpp? Maybe if I solve this problem then all the other error messages, or most, will also go away. If there is a simple/obvious fix please let me know. Thank you. Andrew M. Neiderer US Army Research Laboratory

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[smart_ptr] make_shared imposes const ref.
by Robert Jones 29 Nov '11

29 Nov '11

Why is make_shared declared as template<typename T, typename Arg1 > shared_ptr<T> make_shared( Arg1 const & arg1 ); rather than template<typename T, typename Arg1 > shared_ptr<T> make_shared( Arg1 arg1 ); since the effect is that if you have a constructor that takes non-const references you cannot use make_shared( ) on it. Thx, - Rob.

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exception mechanism of boost.regex conflicts with QT lib.
by cat fa 29 Nov '11

29 Nov '11

a short piece of code: ///////////////////////////////////// boost::regex reg;; try { reg.assign( "[]d"); } catch(std::runtime_error &e) { //exception } ////////////////////////// this code runs well in Eclipse with MingW. When I copy this code in my QT project and run, it seems that QT lib cannot handle the exception which boost.regex lib throws. A run time termination warning shows as a result. I'm using win7 64bit. My QT is integrated with MingW 4.4 . Did any one encounter a similar problem? Could someone help me ?

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