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Re: [Boost-users] Boost::Regex runtime link error
by gdprosch＠micron.com 15 Apr '06

15 Apr '06

I need to amend my earlier assertion (see below). I had incorrectly specified my link instructions for static linkage. If I link against the static library the problem is resolved. This is, however, undesirable so I would still like to resolve the link issue against the dynamic library. << I have verified that the symbol is present in the debug and archive versions of the library and I have even tried linking against those with the same results. >> Thanks again - Greg

2 1

BGL and graphviz: extra property for links
by Irek Szczesniak 14 Apr '06

14 Apr '06

I want to use the read_graphiz function to load graphviz files. Graph links have an extra property called "lambdas," which tells about the number of wavelengths a link has. This link attribute is a positive integer. Below I'm sending you the program which I thought should work, but it doesn't. Plus, there is a sample graphviz file. I have hard time trying to decipher the errors, and made little progress, and so I would appreciate any advice. I'm attaching the compilation errors. Thanks for reading. Thanks & best, Irek ********************************************************************* #include <fstream> #include <string> #include <boost/graph/adjacency_list.hpp> #include <boost/graph/graphviz.hpp> #include <boost/graph/depth_first_search.hpp> #include <boost/graph/iteration_macros.hpp> using namespace boost; enum edge_lambdas_t { edge_lambdas }; namespace boost { BOOST_INSTALL_PROPERTY(edge, lambdas); } typedef boost::adjacency_list<vecS, vecS, undirectedS, property<vertex_name_t, std::string>, property<edge_weight_t, double>, property<edge_lambdas_t, int> > Graph; int main() { Graph g; dynamic_properties dp; dp.property("lambdas", get(edge_lambdas, g)); dp.property("node_id", get(vertex_name, g)); dp.property("distance", get(edge_weight, g)); read_graphviz(std::cin, g, dp); } *********************************************************************** graph { a; b; c; c -- a [distance="100", lambdas="4"]; a -- b [distance="200", lambdas="4"]; } *********************************************************************** g++ -I /usr/local/include/boost-1_33_1/ -l bgl-viz load.cc -o load /usr/local/include/boost-1_33_1/boost/dynamic_property_map.hpp: In member function `std::string boost::detail::dynamic_property_map_adaptor<PropertyMap>::get_string(const boost::any&) [with PropertyMap = boost::adj_list_edge_property_map<boost::undirected_tag, boost::detail::error_property_not_found, boost::detail::error_property_not_found&, size_t, boost::property<boost::edge_weight_t, double, boost::no_property>, edge_lambdas_t>]': load.cc:236: instantiated from here /usr/local/include/boost-1_33_1/boost/dynamic_property_map.hpp:196: error: no match for 'operator<<' in 'out << boost::get [with PropertyMap = boost::adj_list_edge_property_map<boost::undirected_tag, boost::detail::error_property_not_found, boost::detail::error_property_not_found&, size_t, boost::property<boost::edge_weight_t, double, boost::no_property>, edge_lambdas_t>, Reference = boost::detail::error_property_not_found&, K = boost::detail::edge_desc_impl<boost::undirected_tag, size_t>](((const boost::put_get_helper<boost::detail::error_property_not_found&, boost::adj_list_edge_property_map<boost::undirected_tag, boost::detail::error_property_not_found, boost::detail::error_property_not_found&, size_t, boost::property<boost::edge_weight_t, double, boost::no_property>, edge_lambdas_t> >&)((const boost::put_get_helper<boost::detail::error_property_not_found&, boost::adj_list_edge_property_map<boost::undirected_tag, boost::detail::error_property_not_found, boost::detail::error_property_not_found&, size_t, boost::property<boost::edge_weight_t, double, boost::no_property>, edge_lambdas_t> >*)((boost::put_get_helper<boost::detail::error_property_not_found&, boost::adj_list_edge_property_map<boost::undirected_tag, boost::detail::error_property_not_found, boost::detail::error_property_not_found&, size_t, boost::property<boost::edge_weight_t, double, boost::no_property>, edge_lambdas_t> >*)(((boost::adj_list_edge_property_map<boost::undirected_tag, boost::detail::error_property_not_found, boost::detail::error_property_not_found&, size_t, boost::property<boost::edge_weight_t, double, boost::no_property>, edge_lambdas_t>*)((boost::detail::dynamic_property_map_adaptor<boost::adj_list_edge_property_map<boost::undirected_tag, boost::detail::error_property_not_found, boost::detail::error_property_not_found&, size_t, boost::property<boost::edge_weight_t, double, boost::no_property>, edge_lambdas_t> >*)this)) + 4u)))), ((const boost::detail::edge_desc_impl<boost::undirected_tag, size_t>&)((const boost::detail::edge_desc_impl<boost::undirected_tag, size_t>*)(&boost::any_cast [with ValueType = boost::detail::edge_desc_impl<boost::undirected_tag, size_t>](((const boost::any&)(+key)))))))' /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:63: note: candidates are: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>&(*)(std::basic_ostream<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:74: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ios<_CharT, _Traits>&(*)(std::basic_ios<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:86: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::ios_base&(*)(std::ios_base&)) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:121: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long int) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:155: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long unsigned int) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:98: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(bool) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:178: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short int) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:189: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short unsigned int) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:193: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:204: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(unsigned int) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:179: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:214: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long long unsigned int) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:238: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(double) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:219: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(float) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:261: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(long double) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:284: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(const void*) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:307: note: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_streambuf<_CharT, _Traits>*) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:504: note: std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const unsigned char*) [with _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:499: note: std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const signed char*) [with _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:612: note: std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char*) [with _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:567: note: std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:465: note: std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, unsigned char) [with _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:460: note: std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, signed char) [with _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/ostream.tcc:505: note: std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char) [with _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/ostream:449: note: std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char) [with _CharT = char, _Traits = std::char_traits<char>] /usr/local/include/boost-1_33_1/boost/lexical_cast.hpp: In member function `bool boost::detail::lexical_stream<Target, Source>::operator>>(InputStreamable&) [with InputStreamable = boost::detail::error_property_not_found, Target = boost::detail::error_property_not_found, Source = std::basic_string<char, std::char_traits<char>, std::allocator<char> >]': /usr/local/include/boost-1_33_1/boost/lexical_cast.hpp:222: instantiated from `Target boost::lexical_cast(const Source&) [with Target = boost::detail::error_property_not_found, Source = std::basic_string<char, std::char_traits<char>, std::allocator<char> >]' /usr/local/include/boost-1_33_1/boost/dynamic_property_map.hpp:42: instantiated from `Value boost::detail::read_value(const std::string&) [with Value = boost::detail::error_property_not_found]' /usr/local/include/boost-1_33_1/boost/dynamic_property_map.hpp:160: instantiated from `void boost::detail::dynamic_property_map_adaptor<PropertyMap>::do_put(const boost::any&, const boost::any&, mpl_::bool_< true>) [with PropertyMap = boost::adj_list_edge_property_map<boost::undirected_tag, boost::detail::error_property_not_found, boost::detail::error_property_not_found&, size_t, boost::property<boost::edge_weight_t, double, boost::no_property>, edge_lambdas_t>]' /usr/local/include/boost-1_33_1/boost/dynamic_property_map.hpp:203: instantiated from `void boost::detail::dynamic_property_map_adaptor<PropertyMap>::put(const boost::any&, const boost::any&) [with PropertyMap = boost::adj_list_edge_property_map<boost::undirected_tag, boost::detail::error_property_not_found, boost::detail::error_property_not_found&, size_t, boost::property<boost::edge_weight_t, double, boost::no_property>, edge_lambdas_t>]' load.cc:236: instantiated from here /usr/local/include/boost-1_33_1/boost/lexical_cast.hpp:156: error: no match for 'operator>>' in '((boost::detail::lexical_stream<boost::detail::error_property_not_found, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >*)this)->boost::detail::lexical_stream<boost::detail::error_property_not_found, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >::stream >> output' /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:87: note: candidates are: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>&(*)(std::basic_istream<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:93: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_ios<_CharT, _Traits>&(*)(std::basic_ios<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:102: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base&(*)(std::ios_base&)) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:111: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:133: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:164: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:186: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:217: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:239: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:261: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:284: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:306: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:329: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(float&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:351: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(double&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:373: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(long double&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:395: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/bits/istream.tcc:417: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_streambuf<_CharT, _Traits>*) [with _CharT = char, _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/istream:692: note: std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, signed char*) [with _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/istream:687: note: std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, unsigned char*) [with _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/istream:651: note: std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, signed char&) [with _Traits = std::char_traits<char>] /usr/lib/gcc/i386-redhat-linux/3.4.4/../../../../include/c++/3.4.4/istream:646: note: std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, unsigned char&) [with _Traits = std::char_traits<char>] make: *** [load] Error 1

1 1

tribool serialization
by Austin Bingham 14 Apr '06

14 Apr '06

I've been trying to write serialization code for tribool, and I'm completely dumbfounded at this point. I'm using the "split free" approach, but no matter how I phrase things, the compiler never seems to believe that I've written code to de/serialize tribool. Here's an example of what doesn't work: template <class Archive> void save(Archive& ar, const boost::logic::tribool& b, const unsigned int version) { // irrelevant } template <class Archive> void load(Archive& ar, boost::logic::tribool& b, const unsigned int version) { // irrelevant } BOOST_SERIALIZATION_SPLIT_FREE(boost::logic::tribool); This *seems* correct, but the compiler complains that "tribool has no member named serialize". While this is true, the split-free technique means it won't be requested. Our code uses the split-free approach for other classes, so I'm fairly certain I know how to do it correctly. Is there something magical about tribool that makes this approach break? More importantly, is there a known way to de/serialize tribool? Thanks. -- Austin Bingham "If I were creating the world I wouldn't mess about with butterflies and daffodils. I would have started with lasers, eight o'clock, Day One!" Evil

2 1

Boost::Regex runtime link error
by gdprosch＠micron.com 14 Apr '06

14 Apr '06

I am getting the following runtime link error when running a process that has a dependency on libboost_regex-gcc.so ld.so.1: configsrv: fatal: relocation error: file /esdadev/dev/gdprosch/7.1/solaris/debug/lib/libesda.so: symbol _ZN5boost11basic_regexIcNS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE9 do_assignEPKcS7_j: referenced symbol not found The demangled symbol is... nm --demangle ../lib/libesda.so | grep do_assign U boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::do_assign(char const*, char const*, unsigned) My linkage looks to be okay in my library (libesda.so): ldd ../lib/libesda.so | grep boost libboost_date_time-gcc.so => /esdadev/extsrc/solaris/boost/lib/libboost_date_time-gcc.so libboost_filesystem-gcc.so => /esdadev/extsrc/solaris/boost/lib/libboost_filesystem-gcc.so libboost_regex-gcc.so => /esdadev/extsrc/solaris/boost/lib/libboost_regex-gcc.so The function is in /boost/regex/v4/basic_regex.hpp basic_regex& do_assign(const charT* p1, const charT* p2, flag_type f); I am running on a Solaris 2.8 host where my application and boost 1_33_1 were built using gcc 3.3.1 I have seen two other posting in the archives (V824.1 and V850.3) where other users had similar problems but I saw no resolution posted. I have verified that the symbol is present in the debug and archive versions of the library and I have even tried linking against those with the same results. nm --demangle $BOOST_HOME/lib/libboost_regex-gcc-d.so | grep do_assign 000a65ac W boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::do_assign(char const*, char const*, unsigned) 000e3b70 W boost::basic_regex<wchar_t, boost::regex_traits<wchar_t, boost::cpp_regex_traits<wchar_t> > >::do_assign(wchar_t const*, wchar_t const*, unsigned) Any insight would be most helpful. Thanks in advance :-) Greg Prosch

1 0

[Boost.Signals] signalN
by Benjamin Lau 14 Apr '06

14 Apr '06

Hello all, I've been searching around the documentation a while but I can't find out up to how many parameters can a signal take in. Or to phrase the question differently, for signalN as referenced in the documentation of Boost.signals: http://www.boost.org/doc/html/signalN.html what is the highest possible N assuming I use an unmodified version of the latest Boost release. Thanks. Benjamin Lau

2 1

[general] Speeding up compilation?
by Lynn Allan 14 Apr '06

14 Apr '06

<alert comment="stl newbie"> vc7.1 Visual C++ user: Sorry if this has been asked before. My impression is that this is the nature of templates, since code is being generated as objects are instantiated. Are there guidelines for speeding up compilation/linkage of code that moderately/heavily uses templates? It seems to take a looooong time, even on a relatively modern development computer. Precompiled headers don't seem to help .... perhaps it is counter-productive to use precompiled headers with stl/boost? Or I'm ignorant about proper usage? Are there vc7.1 / vc8 settings to speed up development? GCC? Is this #define applicable (and/or perhaps others): BOOST_MPL_USE_PREPROCESSED_HEADERS </alert>

5 6

utf8_codecvt_facet linking problem with VC 7.1
by Raider 14 Apr '06

14 Apr '06

I'm trying to compile simple code using utf8_codecvt_facet: // ---- UTF8.cpp starts ------------------------------ #include <iostream> #include <fstream> #include <string> #include <locale> #include <boost/program_options/detail/utf8_codecvt_facet.hpp> using namespace std; int main() { locale loc; locale utf8loc(loc, new boost::program_options::detail::utf8_codecvt_facet()); wifstream f; f.imbue(utf8loc); f.open("UTF8.txt", ios::binary); wstring s; f >> s; f.close(); return 0; } // ---- UTF8.cpp ends ------------------------------ It works OK with VC 8.0 (both building Boost and this code with VC 8.0). But I get linker errors with VC 7.1 (both building Boost and this code with VC 7.1): UFT8.obj : error LNK2001: unresolved external symbol "protected: virtual int __thiscall boost::program_options::detail::utf8_codecvt_facet::do_out(int &,unsigned short const *,unsigned short const *,unsigned short const * &,char *,char *,char * &)const " (?do_out@utf8_codecvt_facet@detail@program_options@boost@@MBEHAAHPBG1AAPBGPAD3AAPAD@Z) UFT8.obj : error LNK2001: unresolved external symbol "protected: virtual int __thiscall boost::program_options::detail::utf8_codecvt_facet::do_in(int &,char const *,char const *,char const * &,unsigned short *,unsigned short *,unsigned short * &)const " (?do_in@utf8_codecvt_facet@detail@program_options@boost@@MBEHAAHPBD1AAPBDPAG3AAPAG@Z) As a linker tells me the reference is: ?do_in@utf8_codecvt_facet@detail@program_options@boost@@MBEHAAHPBD1AAPBDPAG3AAPAG@Z But library (auto-linked libboost_program_options-vc71-sgd-1_33_1.lib) contains: ?do_in@utf8_codecvt_facet@detail@program_options@boost@@MBEHAAHPBD1AAPBDPA_W3AAPA_W@Z When I add Boost/libs/program_options/src/utf8_codecvt_facet.cpp to my VC 7.1 project, the sample code builds fine. The question is how to build this code under VC 7.1? Is it needed to rebuild Boost's libboost_program_options-vc71-*-1_33_1.lib with some compiler options to get ?do_in@utf8_codecvt_facet@detail@program_options@boost@@MBEHAAHPBD1AAPBDPAG3AAPAG@Z export or to build code above with some options to get ?do_in@utf8_codecvt_facet@detail@program_options@boost@@MBEHAAHPBD1AAPBDPA_W3AAPA_W@Z reference?

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[spirit] thread safety / lock freedom
by Tim Blechmann 13 Apr '06

13 Apr '06

hi all, i'm currently looking into the spirit library to create a parser ... it seems to be threadsafe, but it's using thread locks. is it possible to use the library in a lockfree manner? can i be sure, that there will be no lock misses, when i'm not sharing parsers between the threads? thanks in advance ... tim -- TimBlechmann(a)gmx.de ICQ: 96771783 http://www.mokabar.tk All we composers really have to work with is time and sound - and sometimes I'm not even sure about sound. Morton Feldman

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[Xpressive] Baffled about results of search
by Lynn Allan 13 Apr '06

13 Apr '06

<alert comment="xpressive newbie"> vc7.1 xpressive from "vault" as of today (April 11) With the statements below (more or less based on Example 1 and Example 2 in the sample code provided with xpressive), I'm attempting to detect which "group" of subexpressions matched, and getting results that I don't understand (not unexpected for a newbie <g>). std::string altDow( "Alternate days of the week are Tue and Thursday and Sat and Monday." ); sregex rex = sregex::compile( "((Sunday|Sun)" "|(Monday|Mon)" "|(Tuesday|Tue)" "|(Wednesday|Wed)" "|(Thursday|Thu)" "|(Friday|Fri)" "|(Saturday|Sat))" ); The first regex_search sort of works, but I'm unclear what field in the smatch:what variable to use to tell what matched, and some oddities are happening. regex_search( altDow, what, rex ) Length(0): 3 Position(0): 31 what[0]: Tue what[1]: Tue what[2]: what[3]: what[4]: Tue The subsequent searches give valid information about the length and position, but other fields in the smatch:what variable seem invalid. regex_search( altDow.substr(32), what, rex) regex_search( altDow.substr(45), what, rex) Regardless, I'm unclear how to tell which of the "groups" of subexpressions was "hit". With boost::regex there was a way to loop thru the boolean field: what[i].matched and see what "hit", but I am not seeing a comparable accessor. Am I doing something wrong, leaving something out, completely clueless on using xpressive, or is xpressive not intended for this kind of usage? (and if xpressive is appropriate, what statements will provide the intended information?) The intention is to be able to to replace/encode the altDay string to be: Alternate days of the week are <dow=2>Tue</dow> and <dow=4>Thursday</dow> and <dow=6>Sat</dow> and <dow=1>Monday</dow>." ); If it will help, here is a link to the vc7.1 project. http://cleanspeech.sf.net/misc/DayOfWeekTest.zip </alert>

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catch(...) in thread_proxy
by Jeremy Stanley 13 Apr '06

13 Apr '06

I find the catch(...) in thread_proxy to be a real nuisance. The only thing I can do to prevent threads from silently slipping away is to put a catch(...) inside my thread procedure, but when this is hit I have no idea what the exception is or where it was thrown. I could configure the debugger (msvc71) to break whenever an exception is thrown, but then I have to wade through handled exceptions in order to find the real error. There was a discussion on this subject about eight months ago where the consensus seemed to be get rid of the catch(...)--any progress on this since then? I notice the catch(...) is still present in CVS, which isn't encouraging. As a refresher, this approach won't help... try { thread_proc(); } catch(...) { exception_filter(); // ... because I don't have a stack trace here. } This sort of approach could be okay though: if ( swallow_exceptions ) { try { thread_proc(); } catch(...) { whatever(); } } else { thread_proc(); } If swallow_exceptions were on by default, it wouldn't change behavior unless the programmer asked for it, perhaps using an optional parameter in the thread and thread_group constructors.

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