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boost python error catching
by cseymour＠interchange.ubc.ca 15 Aug '02

15 Aug '02

Hi, I have some code that worked fine with Python 2.1, but now in Python 2.2.1 it segfaults mysteriuosly. I've narrowed it down to weirdness with the throw/catch of errors. When I do a throw "boost::python::error_already_set();", the "catch(...)" in my module cpp file is supposed to catch it. But it never gets to there. After it's thrown, Python just segfaults and dies. In Python 2.1 it worked perfectly but not in 2.2.1. Any suggestions?

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Boost 1.28 and compile failure in use_count_is_zero class
by david_at_2good 15 Aug '02

15 Aug '02

I am using the free C++Builder Compiler version 5.5.1 for Win32. (http://www.borland.com/products/downloads/download_cbuilder.html) I have used Boost 1.27 without problems, but when compiling the same code with Boost 1.28 I get this error message for the compiler: Error E2113 c:\borland\boost_1_28_0\boost/detail/shared_count.hpp 39: Virtual function 'use_count_is_zero::what() const throw()' conflicts with base class 'exception' The class use_count_is_zero (new in Boost 1.28) inherits from std::exception, and it seems like the method prototype for what() is different in the Borland include files and Boost. Boost: class use_count_is_zero: public std::exception { public: virtual char const * what() const throw() { return "use_count_is_zero"; } }; Borland, who seem to use STL from Rogue Wave Software: class _RWSTDExport exception { public: exception () _RWSTD_THROW_SPEC_NULL { ; } exception (const exception&) _RWSTD_THROW_SPEC_NULL { ; } #if defined(_MSC_VER) && !defined(__BORLANDC__) exception (const char *s) _RWSTD_THROW_SPEC_NULL { ; } #endif exception& operator= (const exception& e) _RWSTD_THROW_SPEC_NULL { return *this; } virtual ~exception () _RWSTD_THROW_SPEC_NULL; virtual const char * what () const _RWSTD_THROW_SPEC_NULL { return __RWSTD::__rw_stdexcept_NoNamedException; } }; The content of _RWSTD_THROW_SPEC_NULL is set in the file stdcomp.h, and it seems like it is empty for the Borland compiler, so I tried to copy the declaration from Borland like below, but got the same error. class use_count_is_zero: public std::exception { public: virtual const char * what () const _RWSTD_THROW_SPEC_NULL { return "use_count_is_zero"; } }; Any suggestions? \David

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boost.bind and g++ 2.95.3 woes
by yg-boost-users＠m.gmane.org 15 Aug '02

15 Aug '02

Hi there, I have a problem compiling the following code with g++ 2.95.3 and boost 1.28.0. ---%<--- #include <boost/bind.hpp> #include <boost/function/function0.hpp> struct A { A(boost::function0<void> const &) { } }; void foo(boost::function0<void> const &) {} void bar(unsigned int) {} int main(int argc, char *argv[]) { boost::bind(foo, boost::bind(bar, 0)); // ok A a1(boost::bind(bar, 0)); // ok A a2(boost::bind(foo, boost::bind(bar, 0))); // error return 0; } --->%--- The line marked with error gives me a whole flood of error messages. Is this a problem with my version of gcc? Or am I doing a stupid mistake? TIA, Markus PS: Here are the errors I get: /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp: In method `boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int>::function0<void>(void)': /opt/ginit/lib/boost-1.28.0/boost/bind.hpp:163: instantiated from `boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > >::operator ()<void, void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &), boost::_bi::list0>(boost::_bi::type<void>, void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &), boost::_bi::list0 &) const' /opt/ginit/lib/boost-1.28.0/boost/bind/bind_template.hpp:21: instantiated from `boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > >::operator ()()' /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp:127: instantiated from `boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > >,void>::invoke(boost::detail::function::any_pointer)' /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp:437: instantiated from `boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int>::assign_to<boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > > >(boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > >, boost::detail::function::function_obj_tag)' /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp:388: instantiated from `boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int>::assign_to<boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > > >(boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > >)' /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp:274: instantiated from `boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int>::function0<boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > > >(boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > >)' test_bind.cpp:16: instantiated from here /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp:271: parameter `f' declared void /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp:274: `f' undeclared (first use this function) /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp:274: (Each undeclared identifier is reported only once /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp:274: for each function it appears in.) /opt/ginit/lib/boost-1.28.0/boost/bind.hpp: In method `void boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > >::operator ()<void, void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &), boost::_bi::list0>(boost::_bi::type<void>, void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &), boost::_bi::list0 &) const': /opt/ginit/lib/boost-1.28.0/boost/bind/bind_template.hpp:21: instantiated from `boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > >::operator ()()' /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp:127: instantiated from `boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > >,void>::invoke(boost::detail::function::any_pointer)' /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp:437: instantiated from `boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int>::assign_to<boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > > >(boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > >, boost::detail::function::function_obj_tag)' /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp:388: instantiated from `boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int>::assign_to<boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > > >(boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > >)' /opt/ginit/lib/boost-1.28.0/boost/function/function_template.hpp:274: instantiated from `boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int>::function0<boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > > >(boost::_bi::bind_t<void,void (*)(const boost::function0<void,boost::empty_function_policy,boost::empty_function_mixin,int> &),boost::_bi::list1<boost::_bi::bind_t<void,void (*)(unsigned int),boost::_bi::list1<boost::_bi::value<int> > > > >)' test_bind.cpp:16: instantiated from here /opt/ginit/lib/boost-1.28.0/boost/bind.hpp:163: Internal compiler error in `emit_move_insn_1', at expr.c:2829 Please submit a full bug report. See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.

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gcc 2.95.3 vs gcc 3.1.1 vs intel c++ 6.0 with BGL and MTL
by Wintermantel , Marc 15 Aug '02

15 Aug '02

Hi, We are working on a Finite Element Library (FELyX - http://felyx.sourceforge.net <http://felyx.sourceforge.net/> ) that makes intensive use of the Boost Graph Library (BGL) as well as the Matrix Template Library (MTL). Up to now we worked with gcc 2.95.3 on Linux (AMD XP2000+ and P4 2.2GHz). Due to several sources on the internet we heard, that gcc 3.1.1 should be at least as fast as gcc 2.95.3 and the Intel c++ 6.0 should be even quite a bit faster then the other two. We used with all three of them -O3 Optimization, but our results up to now are rather disappointing. For a typical calculation we received the following results: Gcc 2.95.3 3.5 sec Gcc 3.1.1 3.9 sec Intel C++ 6.0 8.2 sec The results were quasi identical on both machines. We also tried a Intel PIII 850MHz in a notebook, and the times just scaled up. Further we looked at BGL, MTL and our own code separately and it came out that every part of the code loses almost equally compared to 2.95.3. Has anybody similar experiences or a hint what we could do wrong? Yours truly, Marc Wintermantel Marc Wintermantel IMES - Structures Technology ETH Zurich, LEO C4 Leonhardstrasse 27 CH- 8092 Zurich Tel. ++41 1 633 35 32 Fax. ++41 1 632 17 02 [Non-text portions of this message have been removed]

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re: python weirdness
by cseymour＠interchange.ubc.ca 14 Aug '02

14 Aug '02

hi, i fixed that problem, by using linux_gcc.mak instead of gcc.mak, though now i'm back to where i was with older Boost, where i'm getting seg faults instead of Python errors. (btw linux_gcc.mak is kind of off: the suggested path for the BOOST macro is incorrect, and where $(BOOST) is used I found actually $(ROOT) should be used)

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boost python weirdness - python2.2.1
by cseymour＠interchange.ubc.ca 14 Aug '02

14 Aug '02

hi, I had this extension module for python working fine with older versions of Boost and Python 2.1 but now we've updated to gcc 3 and Python 2.2 and it crashes weirdly, so I decided to try the latest version of Boost. I built the boost python library using /libs/python/build/gcc.mak. Everything seems okay, but when I try to load my library in Python I get: ImportError: ./HDF.so: undefined symbol: do_call__CQ45boost6python6detail4initP7_objectT1 when I check the symbols in my library I have this: U do_call__CQ45boost6python6detail4initP7_objectT1 and a whole lot of things like this: 00199d70 W do_call__CQ45boost6python6detailt24wrapped_function_pointer2ZQ23hdf11HDFVariableZPMQ23hdf7HDFFileFPQ23hdf7HDFFileRCQ35boost6python6stringcRCQ35boost6python5tuple_Q23hdf11HDFVariableP7_objectT1

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graph: edge cuts
by Matthew Galati 14 Aug '02

14 Aug '02

is this a place for simple usage questions? i am a newbie... i want to use graph to return the set of edges in a cut for an undirected graph... that is, for some subset W of N, i want all e = {i in N, j in N} in E such that i is in W and j is not in W is there something built into graph to do this? or should i just do it manually from the adjacency list? thanks, matt -- Matthew Galati Lehigh University, Bethlehem, PA - Operations Research, M.S. Stetson University, Deland, FL - Mathematics, B.S. Office Phone: 610-758-4042 Email: magh(a)lehigh.edu URL: http://www.lehigh.edu/~magh/magh.html

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adge properties getting corrupted when removing edge
by Jakub Plichta 13 Aug '02

13 Aug '02

Hello I have encountered the following problem and so far I have not been able to find a workaround. I start with a bidirectional graph with 4 nodes A, B, C and D. There is a integer edge property installed and I have following edges and their respective properties: E1 = C->B; prop[E1] = 0 E2 = D->B; prop[E2] = 1 E3 = B->A; prop[E3] = 0 I am removing edge E3 and immediately after remove_edge the property for E1 is 1 which is wrong. Is this a known issue? I would really appreciate any suggestions. Thanks Jakub Plichta [Non-text portions of this message have been removed]

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boost::function Usage Question
by Albrecht Fritzsche 13 Aug '02

13 Aug '02

Consider the following code: class Publisher { typedef boost::function<void> Function; public: void SetChecker(const Function& Callback){ } }; class Manager { public: Manager(); private: void Check() {} }; Manager::Manager() { Publisher d; d.SetChecker(std::mem_fun(&Manager::Check)); } How can I get this to work? I always get an error when compiling the last line stating "..boost\function\function_template.hpp(127) : error C2660: '()' : Funktion akzeptiert keine 0 Parameter" Ah, the compiler is VisC++ 6. Thanks for any help Ali

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How to add user's rule to ALL?
by Lev Assinovsky 13 Aug '02

13 Aug '02

Hello folks! I defined my own rule to provide resource compilation. I put invocation of the rule in my Jambase file. But when I run bjam (not jam!) it skipped my rule. I believe that happens because my rule doesn't belong to 'all' list :"exe, lib ..." Should I try to define my rule in the style of EXE or there is more easy way to provide user''s rule invocation in BJAM? Any help will be appreciated! msvc-tools.jam: ------------------ cut here ------------------------ # resource rules for NT rule rescomp { DEPENDS $(<) : $(>) ; rescomp-impl $(<) : $(>) ; } actions rescomp-impl { rc /l "0x409" /d "_DEBUG" "$(>)" } ------------------------------------------------------- Jamfile: ---------------- cut here -------------------------- subproject ICIDM ; rescomp ICIDM.res : ICIDM.rc ; dll ICIDM : ICIDM.cpp ICIDMInterfaces.cpp SWMRGuard.cpp SysDep.cpp : <include>$(ADC_ROOT) <include>$(BOOST_ROOT) ; exe test : test.cpp <dll>ICIDM : <include>$(ADC_ROOT) <include>$(BOOST_ROOT) ; ------------------------------------------------------- ---- Lev Assinovsky Aelita Software Corporation O&S Core Division, Programmer ICQ# 165072909 [Non-text portions of this message have been removed]

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