October 2008 - Boost-users - lists.boost.org

compile problem of boost::accumulators
by Ivy Ye 23 Oct '08

23 Oct '08

hi, I am a newbie in this forum. I just installed boost and want to solve some statistic problems. My system is Windows Vista and compiler is MSVC 6.0 At first I try to compile the "hello world" program in the boost::accumulators user guide page, but I got some compiler errors: The program is #include <iostream> #include <boost/accumulators/accumulators.hpp> #include <boost/accumulators/statistics/stats.hpp> #include <boost/accumulators/statistics/mean.hpp> #include <boost/accumulators/statistics/moment.hpp> using namespace boost::accumulators; int main() { // Define an accumulator set for calculating the mean and the // 2nd moment ... accumulator_set<double, stats<tag::mean, tag::moment<2> > > acc; // push in some data ... acc(1.2); acc(2.3); acc(3.4); acc(4.5); // Display the results ... std::cout << "Mean: " << mean(acc) << std::endl; std::cout << "Moment: " << moment<2>(acc) << std::endl; return 0; } The error I get from compiler is s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(43) : error C2989: 'tag<T>' : template class has already been defined as a non-template class s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(43) : error C2908: explicit specialization; 'tag<T>' has already been instantiated from the primary template s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(43) : error C2988: unrecognizable template declaration/definition s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(48) : error C2989: 'tag<T>' : template class has already been defined as a non-template class s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(43) : see declaration of 'tag<T>' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(48) : error C2908: explicit specialization; 'tag<T>' has already been instantiated from the primary template s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(48) : error C2988: unrecognizable template declaration/definition s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(53) : error C2989: 'tag<T>' : template class has already been defined as a non-template class s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(48) : see declaration of 'tag<T>' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(53) : error C2908: explicit specialization; 'tag<T>' has already been instantiated from the primary template s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(53) : error C2988: unrecognizable template declaration/definition s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(107) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(107) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(108) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(108) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(109) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(109) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(110) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(110) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(111) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(111) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(112) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(112) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(113) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(113) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(114) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(114) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(115) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(115) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(116) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(116) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(117) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(117) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(119) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(119) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(120) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(120) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(121) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(121) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(122) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(122) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(123) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(123) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(124) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(124) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(126) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(127) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(128) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(129) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(137) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(139) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(141) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(143) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(145) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(147) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(149) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(151) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\numeric\functional_fwd.hpp(198) : error C2039: 'type' : is not a member of 'lazy_disable_if<struct boost::is_const<T>,struct ?? :: ?? >' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(82) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(82) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(98) : error C2182: '__formal' : illegal use of type 'void' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(120) : error C2039: 'apply' : is not a member of 'mpl' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(120) : error C2143: syntax error : missing ';' before '<' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(120) : error C2501: 'apply' : missing storage-class or type specifiers s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(120) : error C2059: syntax error : ';' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(120) : error C2059: syntax error : '<' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(120) : error C2039: 'type' : is not a member of '`global namespace'' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(124) : error C2039: 'apply' : is not a member of 'mpl' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(124) : error C2039: 'type' : is not a member of '`global namespace'' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(127) : error C2954: template definitions cannot nest s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(128) : error C2039: 'apply' : is not a member of 'mpl' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(128) : error C2143: syntax error : missing ';' before '<' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(128) : error C2501: 'apply' : missing storage-class or type specifiers s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(128) : error C2086: 'apply' : redefinition s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(128) : error C2059: syntax error : ';' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(128) : error C2059: syntax error : '<' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(128) : error C2039: 'type' : is not a member of '`global namespace'' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2039: 'apply' : is not a member of 'mpl' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2039: 'type' : is not a member of '`global namespace'' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2954: template definitions cannot nest s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2039: 'apply' : is not a member of 'mpl' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2143: syntax error : missing ';' before '<' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2501: 'apply' : missing storage-class or type specifiers s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2086: 'apply' : redefinition s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2059: syntax error : ';' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2059: syntax error : '<' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2039: 'type' : is not a member of '`global namespace'' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2039: 'apply' : is not a member of 'mpl' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2039: 'type' : is not a member of '`global namespace'' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2954: template definitions cannot nest s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2039: 'apply' : is not a member of 'mpl' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2143: syntax error : missing ';' before '<' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2501: 'apply' : missing storage-class or type specifiers s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2086: 'apply' : redefinition s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2059: syntax error : ';' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2059: syntax error : '<' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2039: 'type' : is not a member of '`global namespace'' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2039: 'apply' : is not a member of 'mpl' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2039: 'type' : is not a member of '`global namespace'' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2954: template definitions cannot nest s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2039: 'apply' : is not a member of 'mpl' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2143: syntax error : missing ';' before '<' s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : error C2501: 'apply' : missing storage-class or type specifiers s:\program files\boost\boost_1_36_0\boost\accumulators\accumulators_fwd.hpp(154) : fatal error C1003: error count exceeds 100; stopping compilation Error executing cl.exe. accExam.obj - 102 error(s), 0 warning(s) --------------------------- can someone tell me what is wrong? Many thanks, Ivy

4 3

[Spirit] Closure arg2 compiler error
by Anders Dalvander 23 Oct '08

23 Oct '08

Hi, I get a compiler error (cannot convert from 'const phoenix::nil_t' to 'int') when using arg2 of a two value closure. arg1 works fine, but not arg2. I don't understand what I have done wrong. Visual Studio 2005 SP1 boost 1.36.0 Anyone got any ideas? Best regards, Anders Dalvander Output: Compiling... SpiritClosureTest.cpp d:\prog\boost_1_36_0\boost\spirit\home\classic\phoenix\operators.hpp(446) : error C2440: '=' : cannot convert from 'const phoenix::nil_t' to 'int' No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called d:\prog\boost_1_36_0\boost\spirit\home\classic\phoenix\operators.hpp(446) : while compiling class template member function 'int &phoenix::binary_operator<TagT,T0,T1>::eval(T0 &,const T1 &)' with [ TagT=phoenix::assign_op, T0=int, T1=phoenix::nil_t ] d:\prog\boost_1_36_0\boost\spirit\home\classic\phoenix\operators.hpp(1017) : see reference to class template instantiation 'phoenix::binary_operator<TagT,T0,T1>' being compiled with [ TagT=phoenix::assign_op, T0=int, T1=phoenix::nil_t ] d:\prog\boost_1_36_0\boost\spirit\home\classic\phoenix\composite.hpp(237) : see reference to class template instantiation 'phoenix::assign_op::result<T0,T1>' being compiled with [ T0=int, T1=phoenix::nil_t ] d:\prog\boost_1_36_0\boost\spirit\home\classic\phoenix\composite.hpp(267) : see reference to class template instantiation 'phoenix::composite2_result<OperationT,TupleT,A,B>' being compiled with [ OperationT=phoenix::assign_op, TupleT=phoenix::tuple<>, A=phoenix::actor<phoenix::closure_member<0,phoenix::closure<int,int,phoenix::nil_t>>>, B=phoenix::actor<phoenix::argument<0>> ] d:\prog\boost_1_36_0\boost\spirit\home\classic\phoenix\actor.hpp(122) : see reference to class template instantiation 'phoenix::composite<OperationT,A,B,C>::result<TupleT>' being compiled with [ OperationT=phoenix::assign_op, A=phoenix::actor<phoenix::closure_member<0,phoenix::closure<int,int,phoenix::nil_t>>>, B=phoenix::actor<phoenix::argument<0>>, C=phoenix::as_actor<phoenix::nil_t>::type, TupleT=phoenix::tuple<> ] d:\prog\boost_1_36_0\boost\spirit\home\classic\phoenix\actor.hpp(133) : see reference to class template instantiation 'phoenix::actor_result<ActorT,TupleT>' being compiled with [ ActorT=phoenix::composite<phoenix::assign_op,phoenix::actor<phoenix::closure_member<0,phoenix::closure<int,int,phoenix::nil_t>>>,phoenix::actor<phoenix::argument<0>>,phoenix::as_actor<phoenix::nil_t>::type>, TupleT=phoenix::tuple<> ] c:\documents and settings\anders\my documents\visual studio 2005\projects\spiritclosuretest\spiritclosuretest\spiritclosuretest.cpp(25) : see reference to class template instantiation 'phoenix::actor<BaseT>' being compiled with [ BaseT=phoenix::composite<phoenix::assign_op,phoenix::actor<phoenix::closure_member<0,phoenix::closure<int,int,phoenix::nil_t>>>,phoenix::actor<phoenix::argument<0>>,phoenix::as_actor<phoenix::nil_t>::type> ] c:\documents and settings\anders\my documents\visual studio 2005\projects\spiritclosuretest\spiritclosuretest\spiritclosuretest.cpp(16) : while compiling class template member function 'my_grammar::definition<ScannerT>::definition(const my_grammar &)' with [ ScannerT=boost::spirit::scanner<> ] d:\prog\boost_1_36_0\boost\spirit\home\classic\core\non_terminal\impl\grammar.ipp(279) : see reference to class template instantiation 'my_grammar::definition<ScannerT>' being compiled with [ ScannerT=boost::spirit::scanner<> ] d:\prog\boost_1_36_0\boost\spirit\home\classic\core\non_terminal\impl\grammar.ipp(298) : see reference to function template instantiation 'void boost::spirit::impl::call_helper<0>::do_<result_t,definition_t,ScannerT>(RT &,DefinitionT &,const ScannerT &)' being compiled with [ ScannerT=boost::spirit::scanner<>, RT=result_t, DefinitionT=definition_t ] d:\prog\boost_1_36_0\boost\spirit\home\classic\core\non_terminal\grammar.hpp(55) : see reference to function template instantiation 'boost::spirit::match<boost::spirit::nil_t> boost::spirit::impl::grammar_parser_parse<0,my_grammar,boost::spirit::parser_context<>,ScannerT>(const boost::spirit::grammar<DerivedT> *,const ScannerT &)' being compiled with [ ScannerT=boost::spirit::scanner<>, DerivedT=my_grammar ] d:\prog\boost_1_36_0\boost\spirit\home\classic\core\non_terminal\grammar.hpp(65) : see reference to function template instantiation 'boost::spirit::match<boost::spirit::nil_t> boost::spirit::grammar<DerivedT>::parse_main<ScannerT>(const ScannerT &) const' being compiled with [ DerivedT=my_grammar, ScannerT=boost::spirit::scanner<> ] d:\prog\boost_1_36_0\boost\spirit\home\classic\core\impl\parser.ipp(30) : see reference to function template instantiation 'boost::spirit::match<boost::spirit::nil_t> boost::spirit::grammar<DerivedT>::parse<boost::spirit::scanner<>>(const ScannerT &) const' being compiled with [ DerivedT=my_grammar, ScannerT=boost::spirit::scanner<> ] d:\prog\boost_1_36_0\boost\spirit\home\classic\core\impl\parser.ipp(47) : see reference to function template instantiation 'boost::spirit::parse_info<IteratorT> boost::spirit::parse<const CharT*,DerivedT>(const IteratorT &,const IteratorT &,const boost::spirit::parser<DerivedT> &)' being compiled with [ IteratorT=const char *, CharT=char, DerivedT=my_grammar ] c:\documents and settings\anders\my documents\visual studio 2005\projects\spiritclosuretest\spiritclosuretest\spiritclosuretest.cpp(54) : see reference to function template instantiation 'boost::spirit::parse_info<IteratorT> boost::spirit::parse<char,DerivedT>(const CharT *,const boost::spirit::parser<DerivedT> &)' being compiled with [ IteratorT=const char *, DerivedT=my_grammar, CharT=char ] Source: #include <boost/spirit.hpp> #include <boost/spirit/phoenix/primitives.hpp> #include <iostream> struct result_closure : boost::spirit::closure<result_closure, int, int> { member1 res1; member2 res2; }; struct my_grammar : boost::spirit::grammar<my_grammar> { template <typename ScannerT> struct definition { explicit definition(const my_grammar& self) { using boost::spirit::ch_p; using boost::spirit::uint_p; using phoenix::var; using phoenix::arg1; using phoenix::arg2; exp = uint_p[exp.res1 = arg1] >> ch_p('-') >> uint_p[exp.res2 = arg1] ; root = exp[var(self.i) = arg2] // compiler error here if using arg2. ; // arg1 works fine though. } boost::spirit::rule<ScannerT, result_closure::context_t> exp; boost::spirit::rule<ScannerT> root; const boost::spirit::rule<ScannerT>& start() const { return root; } }; my_grammar(int& i_) : i(i_) { } int& i; }; int main() { int i; my_grammar g(i); if (parse("1-2", g).full) { std::cout << i << "\n"; } }

2 1

Asio timer - how to restart it?
by Peleg 23 Oct '08

23 Oct '08

Hello, I'm writing an Asio based serial port communication application. I've tried to use Asio timer as receive time out timer. The implementation consist of restarting the timer each time the receive event is called, , so it'll trigger only after time out duration with no receive event. The problem is that when I try to restart the timer, using expires_from_now(), the timer immediately triggers. I've written a simplified code that demonstrate this problem: #include <iostream> #include <boost/asio.hpp> #include <boost/thread.hpp> #include <boost/date_time/posix_time/posix_time.hpp> using namespace std; using namespace boost::posix_time; void delay(int sec) { boost::posix_time::ptime expire_time = second_clock::local_time() + boost::posix_time::seconds(sec); while(second_clock::local_time() < expire_time) ; } void on_time_out(const boost::system::error_code& ) { cout << second_clock::local_time() <<" Time out!" << endl; } int main() { boost::asio::io_service io; cout << second_clock::local_time() << " Starting timer" << endl; boost::asio::deadline_timer timer(io, boost::posix_time::seconds(5)); boost::thread thread(boost::bind(&boost::asio::io_service::run, &io)); timer.async_wait(on_time_out); delay(3); cout << second_clock::local_time() << " Restarting timer" << endl; timer.expires_from_now(boost::posix_time::seconds(5)); delay(12); return 0; } This code results the following output: 2008-Oct-23 13:22:59 Starting timer 2008-Oct-23 13:23:02 Restarting timer 2008-Oct-23 13:23:02 Time out! As you can see to on_time_out() is called immediately after expires_from_now() call, with no actual time out. How do I restart to timer in the right way? Thanks, Peleg -- View this message in context: http://www.nabble.com/Asio-timer---how-to-restart-it--tp20128401p20128401.h… Sent from the Boost - Users mailing list archive at Nabble.com.

4 6

question on boost::interprocess
by Markos.Perrakis＠tsx.com 23 Oct '08

23 Oct '08

I have created a shared memory segment with the boost::interprocess library and have created and populated a boost::interprocess::map in that segment. The key for the map is the boost::interprocess::string class. If I want to search for an element in the map I obviously have to supply the key for the element. Here is what I do: { std::string key; // assign here a value to key string object const Char_Alloc char_alloc( (shared_memory_segment_obj.get_segment_manager() ) ); boost::interprocess::string some_string( char_alloc ); some_string.assign( key.c_str() ); } where Char_Alloc is a suitable shared memory allocator for plain characters. As you can see from the code the key (the some_string object) for the map is created in local memory (in-process memory) but the contents of the string are allocated in shared memory. If two threads access this shared memory segment and execute the above code at the same time, is this thread safe? Will the two concurrent assign() statements use the same location in shared memory and cause overlaps? Or is the shared memory allocator smart enough to synchronize the two assign() calls and execute them sequencially? In case the shared memory allocator is not smart enough to guarantee synchronization can I use a boost::interprocess mutex for thread synchronization? Regards, Markos Perrakis -------------------------------------- NOTICE OF CONFIDENTIALITY This e-mail, including all materials contained in or attached to this e-mail, contains proprietary and confidential information solely for the internal use of the intended recipient. If you have received this email in error, please notify us immediately by return e-mail or otherwise and ensure that it is permanently deleted from your systems, and do not print, copy, distribute or read its contents. AVIS DE CONFIDENTIALIT� Le pr�sent courriel, y compris tous les documents qu'il contient ou qui y sont joints, renferme des renseignements exclusifs et confidentiels destin�s uniquement � l'usage interne du destinataire pr�vu. Si vous avez re�u le pr�sent courriel par erreur, veuillez nous aviser imm�diatement, notamment par retour de courriel, et vous assurer qu'il est supprim� de fa�on permanente de vos syst�mes; veuillez �galement vous abstenir d'imprimer, de copier, de distribuer ou de lire son contenu.

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Boost.Asio uses not specified WSAGetLastError
by Yakov Olkhovskiy 23 Oct '08

23 Oct '08

I just have found that Boost.Asio returns wrapped WSAGetLastError code even on successfully executed ::connect (didn't check it for other functions). There is a problem with Norton Personal Firewall - looks like it performs some operation after successful connection and doesn't restore error variable in the DLL. As result on a second (and further) program's run WSAGetLastError returns code 2 (The system cannot find the file specified). After removing record of the program from "Norton Internet Security->Norton Internet Security->Personal Firewall->Program control" list, the program works once and then again returns error on further runs. Actually it looks like as an Asio fault, because WSAGetLastError is not specified on successful function execution.

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[Graph] Dijkstra algorithms checks edge weight is positive: loss of generality ?
by Tristram Gräbener 23 Oct '08

23 Oct '08

Hello, I'm not very familiar yet with all boost::graph internals, but there is something that bothers me: I use a special weight_map (cost functions of my own), providing my own distance_combine. So WeightMap::value_type is CostFunction and DistanceMap::value_type is float The dijkstra algorithm checks if an edge has a positive weight ( boost/graph/dijkstra_shortest_paths.hpp lines 121 & 122 with version 1.36.0). However, it uses the distance_compare parameters where "argument types that match the value type of the DistanceMap property map" So it tries to compare my cost function against a float (which of course is not possible). Of course this test garanties the optimality of the algorithm, but it restricts the use to have the weight_map and the distance_map of the same type. Did I miss how to use custom weight_maps, or is it some special case that wasn't thought of ? For now I just commented out the check Thank you ! PS: a more general optimality condition is (sufficient, but I'm not sure if it's necessary) : the combine function has to be non decreasing : for a node u, and edge e = (u,v), the distance_map d and the weight map w distance_compare(d[u], distance_combine(d[u], w[e]) ) has to be true

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Can not compile a program that uses typeof package by gcc?
by Peng Yu 23 Oct '08

23 Oct '08

Hi, The program below this email does not compile with gcc 4.1.2. g++ (GCC) 4.1.2 20061115 (prerelease) (Debian 4.1.1-21) Copyright (C) 2006 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. I understand that I should ask on the gcc mailing list first, as gcc says it is own bug. But I want to make sure it is not become the typeof package uses some too advanced compiler features. Can somebody let me know if the following code can be compiled by a more recent version of gcc or some other compiler? Thanks, Peng #include <boost/typeof/typeof.hpp> #include <iostream> namespace A { template <typename T> class X { public: X() { } X(T t) : _t(t) { } const T &the_t() const { return _t; } private: T _t; }; template <typename T1, typename T2> struct multiply_traits; template <typename T1, typename T2> struct multiply_traits<X<T1>, T2> { typedef X<T1> result_type; }; template <typename T1, typename T2> typename multiply_traits<X<T1>, T2>::result_type operator*(const X<T1> &x, const T2 &t) { return X<T1>(x.the_t() * t); } } namespace B { template <typename T> class Y { public: Y(T t) : _t(t) { } const T &the_t() const { return _t; } private: T _t; }; template <typename T1, typename T2> //Y<typename multiply_traits<T1, T2>::result_type> operator*(const Y<T1> &y, const T2 &t) { //Y<T1> operator*(const Y<T1> &y, const T2 &t) { Y<BOOST_TYPEOF(T1() * T2())> operator*(const Y<T1> &y, const T2 &t) { return Y<T1>(y.the_t() * t); } } int main () { A::X<int> x(2); B::Y<A::X<int> > y(x); std::cout << (x * 3).the_t() << std::endl; std::cout << (y * 5).the_t().the_t() << std::endl; }

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Fatal Error error 1001: F1001 Internal code generator error
by Estanislao Chapel 23 Oct '08

23 Oct '08

Hi I have a problem I don't know how to solve. I want to try an example from an article from Dr. Dobbs 'The Boost.Threads Library'. When I try to compile it I get a "Fatal Error error 1001: F1001 Internal code generator error". I need your help. I'm stuck with this problem. I use CodeGear(tm) RAD Studio 2007 Version 11.0.2902.10471 in a Windows XP SP3 and Boost 1.3.6.0 I have built Boos with complete option to use the libs in debug builds. The code is as follows: ****************************************************************** #pragma hdrstop #include <boost/thread/thread.hpp> #include <boost/thread/mutex.hpp> #include <boost/bind.hpp> #include <iostream> boost::mutex io_mutex; void count(int id); void count(int id) { for (int i = 0; i < 10; ++i) { boost::mutex::scoped_lock lock(io_mutex); std::cout << id << ": " << i << std::endl; } } #pragma argsused int main(int argc, char* argv[]) { boost::thread thrd1( boost::bind(&count, 1)); <= here occurs the F1001 fatal error boost::thread thrd2( boost::bind(&count, 2)); thrd1.join(); thrd2.join(); return 0; } ********************************************************************** The Output is: Genereringen startade 2008-10-23 11:11:15. __________________________________________________ Projekt C:\Documents and Settings\e-echapel\My Documents\RAD Studio\Projects\ThreadsLab\MutexLab1.cbproj (MakeOne mål): Mål _MakeOne: Mål BccCompile: c:\program files\codegear\rad studio\5.0\bin\bcc32.exe -D_DEBUG;NO_STRICT -D_RTLDLL;_NO_VCL -I"C:\Program Files\boost\boost_1_36_0";"c:\program files\codegear\rad studio\5.0\include";"c:\program files\codegear\rad studio\5.0\include\dinkumware";"c:\program files\codegear\rad studio\5.0\include\vcl";ThreadsLab;"c:\program files\codegear\rad studio\5.0\include\Indy10";"c:\program files\codegear\rad studio\5.0\RaveReports\Lib";C:\boost\include -y -v -vi- -k -r- -c -tWC -tWM -H=Debug\MutexLab1.pch -oDebug\MutexLab1.obj -w-par -Od -vi- -v MutexLab1.cpp MutexLab1.cpp(28,47): Fatal Error error 1001: F1001 Internal code generator error Genereringen av målet BccCompile i projektet MutexLab1.cbproj misslyckades. Genereringen av målet _MakeOne i projektet MutexLab1.cbproj misslyckades. Projektgenereringen av MutexLab1.cbproj misslyckades. Genereringen misslyckades. MutexLab1.cpp(28,47): Fatal Error error 1001: F1001 Internal code generator error 0 varningar 1 fel Förfluten tid: 00:00:01.12 *********************************************************************************** Misslyckades = failed varningar = warnings fel = error Thanks in advance Regards Estanislao

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Anyone with Wind River compiler/MQX RTOS (embedded system) experience?
by Boris 23 Oct '08

23 Oct '08

Does anyone use any Boost libraries with the Wind River compiler on MQX RTOS and can share his experience? Boris

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Using parse_config_file from program_options
by Arthur Carlsson 23 Oct '08

23 Oct '08

Hi! When I try to use the parse_config_file() function from the program_options library I get a link error saying (built on OS X 10.5): Undefined symbols: "boost::program_options::basic_parsed_options<char> boost::program_options::parse_config_file<char>(std::basic_istream<char, std::char_traits<char> >&, boost::program_options::options_description const&, bool)", referenced from: _main in main.cc.o ld: symbol(s) not found Taking a closer look at the code I discovered that the function is declared as a template in boost/program_options/parsers.hpp but is defined in boost/libs/program_options/src/parsers.cpp. Is this really valid? I've thought that templated functions need to be defined along with the declaration as the template arguments need to be evaluated at compile time. Or am I missing something? Thanks in advance! Arthur

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