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RE: [Boost-Users] Newbie missing a header for boost_date_time?
by dick.bridges＠tais.com 24 Jul '03

24 Jul '03

<previous> > I must be missing one or more headers but I can't figure it out. Can > someone help get me pointed in the right direction? > ...lots of compiler stuff omitted... My guess is that you don't have the boost root directory in your include path options. This would be the boost\boost_1_30_0 directory.... HTH, Jeff </previous> I'm pretty sure the headers are being found. If I replace posix_time.hpp with posix_time_types.hpp, the error and many of the warnings disappear. In other words... #include <boost/date_time/gregorian/gregorian.hpp> //#include <boost/date_time/posix_time/posix_time.hpp> #include <boost/date_time/posix_time/posix_time_types.hpp> avoids the error message. Changing it back to: #include <boost/date_time/gregorian/gregorian.hpp> #include <boost/date_time/posix_time/posix_time.hpp> //#include <boost/date_time/posix_time/posix_time_types.hpp> results in... <error> c:\boost\boost_1_30_0\boost\lexical_cast.hpp(147) : error C2679: binary ' <<' : no operator found which takes a right-hand operand of type 'const boost::token_iterator_generator<TokenizerFunc,Iterator,Type>::value_type' (or there is no acceptable conversion) with [ TokenizerFunc=boost::char_delimiters_separator<char>, Iterator=std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator, Type=std::string ] c:\boost\boost_1_30_0\boost\lexical_cast.hpp(146) : while compiling class-template member function 'bool boost::detail::lexical_stream<Target,Source>::operator <<(const Source &)' with [ Target=unsigned short, Source=boost::token_iterator_generator<boost::char_delimiters_separator<char>,std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator,std::string>::value_type ] c:\boost\boost_1_30_0\boost\lexical_cast.hpp(189) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=unsigned short, Source=boost::token_iterator_generator<boost::char_delimiters_separator<char>,std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator,std::string>::value_type ] c:\boost\boost_1_30_0\boost\date_time\time_parsing.hpp(30) : see reference to function template instantiation 'Target boost::lexical_cast<unsigned short,boost::token_iterator_generator<TokenizerFunc,Iterator,Type>::value_type>(Source)' being compiled with [ Target=unsigned short, TokenizerFunc=boost::char_delimiters_separator<char>, Iterator=std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator, Type=std::string, Source=boost::token_iterator_generator<boost::char_delimiters_separator<char>,std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator,std::string>::value_type ] c: \boost\boost_1_30_0\boost\date_time\posix_time\time_parsers.hpp(18) : see reference to function template instantiation 'time_duration boost::date_time::parse_delimited_time_duration<boost::posix_time::time_duration>(const std::string &)' being compiled with [ time_duration=boost::posix_time::time_duration ] </error> ...which refers to lexical_cast.hpp template<typename Target, typename Source> class lexical_stream { bool operator<<(const Source &input) { here ===> return stream << input; <==== here } } So I assume there's a header somewhere that defines the '<<' operator referred to. I don't know if this is related to my use of VC7.1 or not. I'm trying to find someone around here with VC7 to build boost_1_30_0 and see if that makes a difference. No luck so far.

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[uBLAS] Constructing from std::vector
by Alex Henderson 24 Jul '03

24 Jul '03

Hi, I'm starting to play with the uBLAS library. So far so good... I'd like to be able to construct a ublas::vector from a std::vector. I can't seem to find how to do this. Do I have to go through std::copy or something equivalent or is there a constructor I've missed? If it doesn't exist, is there a reason why not? Perhaps there are some holes in my understanding. Thanks, Alex

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Binary compatibility of boost dll files
by Rodolfo Lima 24 Jul '03

24 Jul '03

I see that several boost libraries can be compiled as dll files. I'd like to know if there's any concern about binary compatilibity between different versions of those dll's as boost's version number (and possibly the library itself) changes. For instance, whenever MFC's dll binary interface changes, we have another library version written in it's name (MFC42.dll, MFC70.dll, MFC71.dll...), this way we can help avoiding "dll hell". It would be also cool to link a version resource in each dll. This way, installers would check if a newer dll exists in the system, avoiding overwriting with an older one. And one last thing... the import library of date_time's dll isn't being generated, making it unusable. It's better to delete the dll target of its jamfile. If any help of my part is needed, I'd be glad to help. regards, rod

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RE: [Boost-Users] Is there a boost_date_time dll?
by Jeff Garland 24 Jul '03

24 Jul '03

> Development environment is .NET 2003 (i.e., VC7.1). > > I'm reasonably sure there were no errors when I built boost_1_30_0. > > \boost_1_30_0\libs\date_time\build\bin\boost_date_time.dll certainly exists > - but it's a directory that contains a subdirectory (. > \vc7\debug\runtime-link-dynamic) that contains a .CMD, .pdb and two .obj > files. As the old saying goes: "I can see fine - I just don't understand > what I'm looking at." > > I'm clearly having a "senior moment" but honestly: I searched boost.org, > google.com and [even] altavista.com/web/adv. > > Any pointers to get me back on the right track would be appreciated. Couple of thoughts here: 1) Look for the static lib instead. This is the one I'm sure works. And anyway, there is hardly anything in the library anyway so there really isn't an much advantage to a dll. 2) Try doing the library build again, but at the date-time level only. Change down to libs/date_time/build and run bjam. This might give you some hints about what actually built. Jeff

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RE: [Boost-Users] Newbie missing a header for boost_date_time?
by Jeff Garland 24 Jul '03

24 Jul '03

> I must be missing one or more headers but I can't figure it out. Can > someone help get me pointed in the right direction? > ...lots of compiler stuff omitted... My guess is that you don't have the boost root directory in your include path options. This would be the boost\boost_1_30_0 directory.... HTH, Jeff

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RE: [Boost-Users] boost::date_time + setting system clock
by Jeff Garland 24 Jul '03

24 Jul '03

> I was wondering if it is possible to set the clock using date_time. I been >looking but have found no clue that it is so. From what I have seen so far, > this library does a lot of cool stuff, and why not this. I'm afraid the library doesn't support this feature. Contributions are always welcome, though ;-) > I am working on a little personal project that uses an ORB. The idea is > to have all clocks synchronized. I have one machine that queries an > atomic time server. After having done so it will call each machine > and synchronize them. I am currently running a mix of Linux, Solaris, > WIN NT 2000 and XP... and it freaks me out not to have them > synchronized. Why not just use NTP? http://www.ntp.org/ Jeff

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Problem with regular expression
by Javier de Acha 24 Jul '03

24 Jul '03

Hello, The next few lines doesn't work (1) with \s. But (2) works well [[:space:]] regbase::escape_in_lists dont func? Someone it knows because? Thanks Javier --------------------------------------------------------------------- (1) void main() { regex exp("\s(ab)*",regbase::perl); cmatch what; if(regex_match(" ababab", what, exp)) { string str = what[0]; //this fail } } -------------------------------------------------------------------------------- (2) void main() { regex exp("[[:space:]](ab)*",regbase::perl); cmatch what; if(regex_match(" ababab", what, exp)) { string str = what[0]; //this succesfully match } } [Non-text portions of this message have been removed]

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Random Number Generation
by tylersc111 23 Jul '03

23 Jul '03

I've got three questions/comments regarding the Random Number Library: Question (1) --------------------------------------------------------- How about including a facility for generating "antithetic random variates"? (Do a google search if the term is unfamiliar). A partial implementation might be something like the following, (I haven't tried compiling this, so please pardon any syntax errors...): template< class URNG > // Uniform Random Number Generator class antithetic { private: URNG urng; public: explicit antithetic( s ) { urng.seed(s); } // Perhaps not quite right (see question (2) below) typename URNG::result_type operator()() { return URNG::max_value - urng(); } }; Then one would be able to construct two antithetic variates (rng1 & rng2) as follows: mt19937 rng1(seed); antithetic<mt19937> rng2(seed); Question (2) -------------------------------------------------------- Regarding the "uniform_01" generator (and a possible bug in "uniform_in_sphere"). The interval generated by uniform_01 is designed to be the "half-open" interval [0,1). The asymmetry seems unnecessary. How about using the open interval (0,1). I can appreciate that perhaps efficiency is the reason for using the interval [0,1) if one is generating the random floating point numbers by setting the mantissa with a random bit stream. But, consider the following advantage to using (0,1): You would avoid a possible zerodivide in the "uniform_in_sphere" class. Here's my reasoning: Using the current "uniform_01" generator with the half open interval [0,1) the normal_distribution::operator() can return zero. Using my proposed "uniform_01" generator with the open interval (1,1) the normal_distribution::operator() will never return exactly zero. The "zero" return from normal_distribution::operator() could conceivably cause a zerodivide in "uniform_in_sphere". Question (3) -------------------------------------------------------- How about having a boost random number generator whose output would match that of Matlab's random number generator (both uniform and gaussian)? This would be useful in doing sanity tests when porting code to/from Matlab. Here's a link which gives some info on their generators: http://www.mathworks.com/support/solutions/data/8542.shtml

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Newbie missing a header for boost_date_time?
by dick.bridges＠tais.com 23 Jul '03

23 Jul '03

I must be missing one or more headers but I can't figure it out. Can someone help get me pointed in the right direction? <extract> #include "boost/date_time/gregorian/gregorian.hpp" #include "boost/date_time/posix_time/posix_time.hpp" using namespace boost::posix_time; using namespace boost::gregorian; date d(2002,Feb,1); </extract> <results> c:\boost\boost_1_30_0\boost\date_time\gregorian\greg_month.hpp(51) : warning C4244: 'argument' : conversion from 'boost::gregorian::greg_month::month_enum' to 'boost::CV::constrained_value<value_policies>::value_type', possible loss of data with [ value_policies=boost::gregorian::greg_month_policies ] c:\boost\boost_1_30_0\boost\date_time\gregorian\greg_date.hpp(77) : warning C4244: 'argument' : conversion from 'boost::gregorian::date_duration_rep' to 'boost::CV::constrained_value<value_policies>::value_type', possible loss of data with [ value_policies=boost::gregorian::greg_day_of_year_policies ] c:\boost\boost_1_30_0\boost\date_time\time_parsing.hpp(65) : warning C4267: 'initializing' : conversion from 'size_t' to 'int', possible loss of data c:\boost\boost_1_30_0\boost\iterator_adaptors.hpp(1409) : see reference to class template instantiation 'boost::filter_iterator_generator<Predicate,Iterator,Value,Reference,Pointer,Category,Distance>' being compiled c:\boost\boost_1_30_0\boost\date_time\time_duration.hpp(69) : warning C4244: 'return' : conversion from 'boost::date_time::time_resolution_traits<frac_sec_type,res,resolution_adjust,frac_digits>::fractional_seconds_type' to 'boost::date_time::time_duration<T,rep_type>::hour_type', possible loss of data with [ frac_sec_type=boost::int64_t, res=micro, resolution_adjust=0x0f4240, frac_digits=6 ] and [ T=boost::posix_time::time_duration, rep_type=boost::posix_time::time_res_traits ] c:\boost\boost_1_30_0\boost\date_time\time_duration.hpp(68) : while compiling class-template member function 'boost::date_time::time_duration<T,rep_type>::hour_type boost::date_time::time_duration<T,rep_type>::hours(void) const' with [ T=boost::posix_time::time_duration, rep_type=boost::posix_time::time_res_traits ] c: \boost\boost_1_30_0\boost\date_time\posix_time\posix_time_config.hpp(62) : see reference to class template instantiation 'boost::date_time::time_duration<T,rep_type>' being compiled with [ T=boost::posix_time::time_duration, rep_type=boost::posix_time::time_res_traits ] c:\boost\boost_1_30_0\boost\date_time\time_duration.hpp(74) : warning C4244: 'return' : conversion from 'boost::date_time::time_resolution_traits<frac_sec_type,res,resolution_adjust,frac_digits>::fractional_seconds_type' to 'boost::date_time::time_duration<T,rep_type>::min_type', possible loss of data with [ frac_sec_type=boost::int64_t, res=micro, resolution_adjust=0x0f4240, frac_digits=6 ] and [ T=boost::posix_time::time_duration, rep_type=boost::posix_time::time_res_traits ] c:\boost\boost_1_30_0\boost\date_time\time_duration.hpp(73) : while compiling class-template member function 'boost::date_time::time_duration<T,rep_type>::min_type boost::date_time::time_duration<T,rep_type>::minutes(void) const' with [ T=boost::posix_time::time_duration, rep_type=boost::posix_time::time_res_traits ] c:\boost\boost_1_30_0\boost\date_time\time_duration.hpp(79) : warning C4244: 'return' : conversion from 'boost::date_time::time_resolution_traits<frac_sec_type,res,resolution_adjust,frac_digits>::fractional_seconds_type' to 'boost::date_time::time_duration<T,rep_type>::sec_type', possible loss of data with [ frac_sec_type=boost::int64_t, res=micro, resolution_adjust=0x0f4240, frac_digits=6 ] and [ T=boost::posix_time::time_duration, rep_type=boost::posix_time::time_res_traits ] c:\boost\boost_1_30_0\boost\date_time\time_duration.hpp(78) : while compiling class-template member function 'boost::date_time::time_duration<T,rep_type>::sec_type boost::date_time::time_duration<T,rep_type>::seconds(void) const' with [ T=boost::posix_time::time_duration, rep_type=boost::posix_time::time_res_traits ] c:\boost\boost_1_30_0\boost\date_time\time_system_counted.hpp(39) : warning C4244: 'initializing' : conversion from 'boost::date_time::counted_time_rep<config>::int_type' to 'boost::date_time::gregorian_calendar_base<ymd_type_,date_int_type_>::date_int_type', possible loss of data with [ config=boost::posix_time::millisec_posix_time_system_config ] and [ ymd_type_=boost::gregorian::greg_year_month_day, date_int_type_=boost::date_time::int_adapter<unsigned long>::int_type ] c:\boost\boost_1_30_0\boost\date_time\time_system_counted.hpp(38) : while compiling class-template member function 'boost::date_time::counted_time_rep<config>::date_type boost::date_time::counted_time_rep<config>::date(void) const' with [ config=boost::posix_time::millisec_posix_time_system_config ] c:\boost\boost_1_30_0\boost\date_time\time_system_counted.hpp(72) : see reference to class template instantiation 'boost::date_time::counted_time_rep<config>' being compiled with [ config=boost::posix_time::millisec_posix_time_system_config ] c:\boost\boost_1_30_0\boost\date_time\time.hpp(48) : see reference to class template instantiation 'boost::date_time::counted_time_system<time_rep>' being compiled with [ time_rep=boost::posix_time::int64_time_rep ] c:\boost\boost_1_30_0\boost\date_time\posix_time\ptime.hpp(19) : see reference to class template instantiation 'boost::date_time::base_time<T,time_system>' being compiled with [ T=boost::posix_time::ptime, time_system=boost::posix_time::posix_time_system ] c:\boost\boost_1_30_0\boost\date_time\gregorian_calendar.ipp(120) : warning C4244: 'initializing' : conversion from 'unsigned long' to 'unsigned short', possible loss of data c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\streambuf(250) : while compiling class-template member function 'boost::date_time::gregorian_calendar_base<ymd_type_,date_int_type_>::ymd_type boost::date_time::gregorian_calendar_base<ymd_type_,date_int_type_>::from_day_number(boost::date_time::gregorian_calendar_base<ymd_type_,date_int_type_>::date_int_type)' with [ ymd_type_=boost::gregorian::greg_year_month_day, date_int_type_=boost::date_time::int_adapter<unsigned long>::int_type ] c: \boost\boost_1_30_0\boost\date_time\gregorian\greg_calendar.hpp(22) : see reference to class template instantiation 'boost::date_time::gregorian_calendar_base<ymd_type_,date_int_type_>' being compiled with [ ymd_type_=boost::gregorian::greg_year_month_day, date_int_type_=boost::date_time::int_adapter<unsigned long>::int_type ] c:\boost\boost_1_30_0\boost\date_time\gregorian_calendar.ipp(121) : warning C4244: 'initializing' : conversion from 'unsigned long' to 'unsigned short', possible loss of data c:\boost\boost_1_30_0\boost\date_time\gregorian_calendar.ipp(125) : warning C4244: 'argument' : conversion from 'boost::date_time::gregorian_calendar_base<ymd_type_,date_int_type_>::date_int_type' to 'unsigned short', possible loss of data with [ ymd_type_=boost::gregorian::greg_year_month_day, date_int_type_=boost::date_time::int_adapter<unsigned long>::int_type ] c:\boost\boost_1_30_0\boost\date_time\date_parsing.hpp(30) : warning C4244: 'argument' : conversion from 'int' to 'unsigned short', possible loss of data c:\boost\boost_1_30_0\boost\date_time\gregorian\parsers.hpp(17) : see reference to function template instantiation 'date_type boost::date_time::parse_date<boost::gregorian::date>(const std::string &)' being compiled with [ date_type=boost::gregorian::date ] c:\boost\boost_1_30_0\boost\date_time\date_parsing.hpp(31) : warning C4244: 'argument' : conversion from 'int' to 'unsigned short', possible loss of data c:\boost\boost_1_30_0\boost\date_time\date_parsing.hpp(32) : warning C4244: 'argument' : conversion from 'int' to 'unsigned short', possible loss of data c:\boost\boost_1_30_0\boost\date_time\date_parsing.hpp(54) : warning C4244: 'argument' : conversion from 'int' to 'unsigned short', possible loss of data c:\boost\boost_1_30_0\boost\date_time\gregorian\parsers.hpp(22) : see reference to function template instantiation 'date_type boost::date_time::parse_undelimited_date<boost::gregorian::date>(const std::string &)' being compiled with [ date_type=boost::gregorian::date ] c:\boost\boost_1_30_0\boost\date_time\date_parsing.hpp(55) : warning C4244: 'argument' : conversion from 'int' to 'unsigned short', possible loss of data c:\boost\boost_1_30_0\boost\date_time\date_parsing.hpp(56) : warning C4244: 'argument' : conversion from 'int' to 'unsigned short', possible loss of data c:\boost\boost_1_30_0\boost\date_time\time_parsing.hpp(103) : warning C4244: 'initializing' : conversion from 'int' to 'short', possible loss of data c:\boost\boost_1_30_0\boost\date_time\time_parsing.hpp(130) : see reference to function template instantiation 'time_duration boost::date_time::parse_undelimited_time_duration<time_duration>(const std::string &)' being compiled with [ time_duration=time_duration ] c: \boost\boost_1_30_0\boost\date_time\posix_time\time_parsers.hpp(26) : see reference to function template instantiation 'time_type boost::date_time::parse_iso_time<boost::posix_time::ptime>(const std::string &,char)' being compiled with [ time_type=boost::posix_time::ptime ] c:\boost\boost_1_30_0\boost\lexical_cast.hpp(147) : warning C4800: 'void *' : forcing value to bool 'true' or 'false' (performance warning) c:\boost\boost_1_30_0\boost\lexical_cast.hpp(146) : while compiling class-template member function 'bool boost::detail::lexical_stream<Target,Source>::operator <<(const Source &)' with [ Target=int, Source=boost::token_iterator_generator<boost::char_delimiters_separator<char>,std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator,std::string>::value_type ] c:\boost\boost_1_30_0\boost\lexical_cast.hpp(189) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=int, Source=boost::token_iterator_generator<boost::char_delimiters_separator<char>,std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator,std::string>::value_type ] c:\boost\boost_1_30_0\boost\date_time\date_parsing.hpp(28) : see reference to function template instantiation 'Target boost::lexical_cast<int,boost::token_iterator_generator<TokenizerFunc,Iterator,Type>::value_type>(Source)' being compiled with [ Target=int, TokenizerFunc=boost::char_delimiters_separator<char>, Iterator=std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator, Type=std::string, Source=boost::token_iterator_generator<boost::char_delimiters_separator<char>,std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator,std::string>::value_type ] c:\boost\boost_1_30_0\boost\date_time\gregorian\parsers.hpp(17) : see reference to function template instantiation 'date_type boost::date_time::parse_date<boost::gregorian::date>(const std::string &)' being compiled with [ date_type=boost::gregorian::date ] c:\boost\boost_1_30_0\boost\lexical_cast.hpp(147) : error C2679: binary ' <<' : no operator found which takes a right-hand operand of type 'const boost::token_iterator_generator<TokenizerFunc,Iterator,Type>::value_type' (or there is no acceptable conversion) with [ TokenizerFunc=boost::char_delimiters_separator<char>, Iterator=std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator, Type=std::string ] c:\boost\boost_1_30_0\boost\lexical_cast.hpp(146) : while compiling class-template member function 'bool boost::detail::lexical_stream<Target,Source>::operator <<(const Source &)' with [ Target=unsigned short, Source=boost::token_iterator_generator<boost::char_delimiters_separator<char>,std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator,std::string>::value_type ] c:\boost\boost_1_30_0\boost\lexical_cast.hpp(189) : see reference to class template instantiation 'boost::detail::lexical_stream<Target,Source>' being compiled with [ Target=unsigned short, Source=boost::token_iterator_generator<boost::char_delimiters_separator<char>,std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator,std::string>::value_type ] c:\boost\boost_1_30_0\boost\date_time\time_parsing.hpp(30) : see reference to function template instantiation 'Target boost::lexical_cast<unsigned short,boost::token_iterator_generator<TokenizerFunc,Iterator,Type>::value_type>(Source)' being compiled with [ Target=unsigned short, TokenizerFunc=boost::char_delimiters_separator<char>, Iterator=std::basic_string<char,std::char_traits<char>,std::allocator<char>>::const_iterator, Type=std::string, Source=boost::token_iterator_generator<boost::char_delimiters_separator<char>,std::basic_string<char,std::char_traits<char>,std::alloca tor<char>>::const_iterator,std::string>::value_type ] c: \boost\boost_1_30_0\boost\date_time\posix_time\time_parsers.hpp(18) : see reference to function template instantiation 'time_duration boost::date_time::parse_delimited_time_duration<boost::posix_time::time_duration>(const std::string &)' being compiled with [ time_duration=boost::posix_time::time_duration ] Build log was saved at "file://c:\dev\AuthStorm\Debug\BuildLog.htm" AuthStorm - 1 error(s), 18 warning(s) ---------------------- Done ---------------------- Build: 0 succeeded, 1 failed, 0 skipped </results>

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Is there a boost_date_time dll?
by dick.bridges＠tais.com 23 Jul '03

23 Jul '03

Development environment is .NET 2003 (i.e., VC7.1). I'm reasonably sure there were no errors when I built boost_1_30_0. \boost_1_30_0\libs\date_time\build\bin\boost_date_time.dll certainly exists - but it's a directory that contains a subdirectory (. \vc7\debug\runtime-link-dynamic) that contains a .CMD, .pdb and two .obj files. As the old saying goes: "I can see fine - I just don't understand what I'm looking at." I'm clearly having a "senior moment" but honestly: I searched boost.org, google.com and [even] altavista.com/web/adv. Any pointers to get me back on the right track would be appreciated.

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