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Boost weak_ptr<>
by Edward Diener 15 Apr '03

15 Apr '03

I don't understand what the practical use of Boost weak_ptr<> is ? Anyone like to clue me in ? I understand that Boost weak_ptr<> creates an internal reference to a Boost shared_ptr<> but I don't understand what that is supposed to accomplish.

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boost::date_time don't work under Kylix
by Konstantin M. Litvinenko 15 Apr '03

15 Apr '03

Hello, All! #include <boost/date_time/posix_time/posix_time.hpp> #include <iostream> int main() { using namespace boost::posix_time; using namespace boost::gregorian; date d(1990,1,1); ptime t(d); std::cout << to_simple_string(t); return 0; } I have tested this sample under 4 compilers - vc7, gcc 2.96 asplinux, builder 5.6.4 and kylix3 (compiler borland 5.6). Under Kylix it produce floating point error. I figure out that this happens because t, after this line ptime t(date(1990,1,1)); have {0} (as i see in debuger). Is this library or kylix bug? It seems to be a __int64 arithmetic error but i am not sure. With best regards, Konstantin M. Litvinenko aka Dark Angel. E-mail: darkangel(a)malva.ua

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Question about SPirit parser terminology
by satya_vajja 15 Apr '03

15 Apr '03

Can anyone explain me what is the difference between a rule, grammar and parser in SPIRIT parser library. Thanks

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Macintosh Carbon Thread Error with Boost 1.30.0
by Bobby Thomale 14 Apr '03

14 Apr '03

Hey guys, I just tried to get the new Boost 1.30.0 release to work on MacOS, using TARGET_CARBON (with threads turned on). I have a problem to report: there's a new "lightweight mutex" being used by the smart pointer library. There does not seem to be a lightweight mutex implementation for the "Carbon MP tasks" thread implementation. So - when I compile my code under Boost 1.30 I end up at: # error Unrecognized threading platform in lightweight_mutex.hpp when it tries to compile any of the smart pointer stuff. Help! :-) -- Bobby --------------------------------------------------------------------- Bobby Thomale Senior Software Developer Inoveon Corporation http://www.inoveon.com/ ---------------------------------------------------------------------

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uBlas Lapack binds from Sandbox - pb with templ. specialisation
by geert_ceuppens 14 Apr '03

14 Apr '03

Toon & Kresimir, I've downloaded the lapack and blas binds from the boost sandbox, and I found out the hard way (again :^( ...) the 'features' of the VC6 compiler, i.e. the lack of support for template specialisation. The offending code is: (line nbr may differ due to versioning) *) boost\numeric\bindings\traits\algorithm.hpp(45): template < typename T > struct is_equal vs: template < typename T > struct is_equal< boost::numeric::ublas::matrix< T > > --> template class has already been defined as a non-template class *) libs\numeric\bindings\blas\test\blas.hpp(51): template < typename T > struct assign_multiplier vs: template < typename T > struct assign_multiplier< std::complex< T > > *) boost\numeric\bindings\traits\traits.hpp(46): template <typename V, typename T = typename V::value_type> struct default_vector_traits vs: template <typename V, typename T> struct default_vector_traits<V const, T> *) boost\numeric\bindings\traits\traits.hpp(112 & 114): This one gave more errors: template <typename MatrixT> inline typename matrix_traits<MatrixT>::pointer matrix_storage (MatrixT& m) { return matrix_traits<MatrixT>::storage (m); } error C2039: 'pointer' : is not a member of 'matrix_traits<M>' error C2146: syntax error : missing ';' before identifier 'matrix_storage' error C2433: 'pointer' : 'inline' not permitted on data declarations error C2501: 'pointer' : missing storage-class or type specifiers error C2059: syntax error : ';' error C2065: 'MatrixT' : undeclared identifier error C2065: 'm' : undeclared identifier 'matrix_storage' : missing storage-class or type specifiers syntax error : missing ';' before '<end Parse>' Any chance of providing non-specialised versions of these so I can use the VC6 compiler? Thanks - Geert

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RE: [Boost-Users] command line parsing
by Jim.Hyslop 14 Apr '03

14 Apr '03

Joe Mariadassou [mailto:joemar@vcisnet.net] wrote: > The URL appears to be invalid. > joe > > -----Original Message----- > From: HartmutKaiser(a)t-online.de [mailto:HartmutKaiser@t-online.de] > Sent: Monday, April 14, 2003 3:04 AM > To: Boost-Users(a)yahoogroups.com > Subject: RE: [Boost-Users] command line parsing > > > As far as I remember Vladimir Prus has requested Boost review for his > program_options library. You can find it here: > > http://zigzag.cs.msu.su:7813/program_options > Works OK for me - maybe the problem is temporary. -- Jim

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test
by iad929 13 Apr '03

13 Apr '03

plz ignore. Mohammed

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RE: [Boost-Users] Unary predicate for shared_ptr == 'real' pointe r?
by dick.bridges＠tais.com 12 Apr '03

12 Apr '03

Thanks! In a sense, I can sympathize with your co-workers. I spent hours trying to get that predicate right - I kept screwing up the 'inner' bind. I keep hoping the more I work with the boost libraries the easier it will get. In my case, that's yet to be seen. ;) Thanks again. Tom Matelich <tmatelich@zetec To: "'Boost-Users(a)yahoogroups.com'" <Boost-Users(a)yahoogroups.com> .com> cc: Subject: RE: [Boost-Users] Unary predicate for shared_ptr == 'real' pointe r? 04/11/2003 01:55 PM Please respond to Boost-Users > From: Mark Storer [mailto:mstorer@cardiff.com] > Sent: Friday, April 11, 2003 1:51 PM > > The whole "new int" thing seems a little odd, but that's an > artifact of creating example code. precisely > What do your co-workers say? I feel like I'm missing something here. While the elegance of the double bind is appreciated, I've heard complaints about it being confusing. ----------------------------------------------------------------------- DISCLAIMER: Information contained in this message and/or attachment(s) may contain confidential information of Zetec, Inc. If you have received this transmission in error, please notify the sender by return email. ----------------------------------------------------------------------- Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

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RE: [Boost-Users] Unary predicate for shared_ptr == 'real' pointe r?
by Tom Matelich 12 Apr '03

12 Apr '03

> From: Mark Storer [mailto:mstorer@cardiff.com] > Sent: Friday, April 11, 2003 1:51 PM > > The whole "new int" thing seems a little odd, but that's an > artifact of creating example code. precisely > What do your co-workers say? I feel like I'm missing something here. While the elegance of the double bind is appreciated, I've heard complaints about it being confusing. ----------------------------------------------------------------------- DISCLAIMER: Information contained in this message and/or attachment(s) may contain confidential information of Zetec, Inc. If you have received this transmission in error, please notify the sender by return email. -----------------------------------------------------------------------

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RE: [Boost-Users] Unary predicate for shared_ptr == 'real' pointe r?
by Mark Storer 12 Apr '03

12 Apr '03

The whole "new int" thing seems a little odd, but that's an artifact of creating example code. What do your co-workers say? I feel like I'm missing something here. --Mark Storer Software Engineer Cardiff Software #include <disclaimer> typedef std::disclaimer<Cardiff> Discard;

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