- Boost-users - lists.boost.org

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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Problem with using special function
by sen_al2002 12 Aug '02

12 Aug '02

Hi, I am new to boost libraries. I just downloaded the whole BOOST_1_28_0 and I added the directory to compiler's list of #include<...> search paths but I still get error when I try to use the atanh() function. I am using Visual C++ v6.0 The error message reads d:\boost_1_28_0\atanh.hpp(77) : error C2989: 'atanh_helper1_t<T,0>' : template class has already been defined as a non-template class Could someone please help me out. Thanks Sen

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RE: [Boost-Users] Getting the hang of Boost::Bind
by Tom Matelich 12 Aug '02

12 Aug '02

> -----Original Message----- > From: Douglas Gregor [mailto:gregod@cs.rpi.edu] > Sent: Friday, August 09, 2002 3:32 PM > To: Boost-Users(a)yahoogroups.com > Subject: Re: [Boost-Users] Getting the hang of Boost::Bind > > > On Friday 09 August 2002 06:08 pm, Tom Matelich wrote: > > I have a vector of > > > > class Landmark > > { > > public: > > std::string const& getName() const; > > ... > > }; > > > > I want to do a find_if for a name that I have. > > > > something like > > std::find_if(begin, end, boost::bind(std::equal<std::string>(???, > > name_to_find))); > > > > What do I put for the ??? ? > > I presume that [begin, end) is an iterator sequence of > Landmark instances? > Then ??? = boost::bind(&Landmark::getName, _1), meaning that > the first > parameter to std::equal<std::string>::operator() is a call to > Landmark::getName where the object parameter (this) is the > first argument > (_1) to the bind function object. Thanks for the quick reply. That's what I thought. To make things more concrete... std::vector<Landmark> v; ... std::vector<Landmark>::const_iterator iter = std::find_if(v.begin(), v.end(), boost::bind(std::equal<std::string>, boost::bind(ZLandmark::Landmark::getName, _1), name_to_find)); Is what I think you're telling me. Perhaps I should mention now that I am using VC6. Compiling the above line I get many errors, here are the first three: inspdoc.cpp(453) : error C2780: 'class boost::_bi::bind_t<R,class boost::_mfi::dm<R,T>,class boost::_bi::list1<class boost::_bi::value<R> > > __cdecl boost::bind(R T::*,A1)' : expects 2 arguments - 3 provided c:\dev\opt\include\boost/bind.hpp(1362) : see declaration of 'bind' inspdoc.cpp(453) : error C2780: 'class boost::_bi::bind_t<R,struct boost::_mfi::cmf8<R,T,B1,B2,B3,B4,B5,B6,B7,B8>,class boost::_bi::list9<class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R> > > __cdecl boost::bind(R (__thiscall T::*)(B1,B2,B3,B4,B5,B6,B7, B8) const,A1,A2,A3,A4,A5,A6,A7,A8,A9)' : expects 10 arguments - 3 provided c:\dev\opt\include\boost/bind/bind_mf_cc.hpp(223) : see declaration of 'bind' inspdoc.cpp(453) : error C2780: 'class boost::_bi::bind_t<R,struct boost::_mfi::mf8<R,T,B1,B2,B3,B4,B5,B6,B7,B8>,class boost::_bi::list9<class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R>,class boost::_bi::value<R> > > __cdecl boost::bind(R (__thiscall T::*)(B1,B2,B3,B4,B5,B6,B7,B 8),A1,A2,A3,A4,A5,A6,A7,A8,A9)' : expects 10 arguments - 3 provided c:\dev\opt\include\boost/bind/bind_mf_cc.hpp(212) : see declaration of 'bind' Oh, and I guess that should be std::equal_to, right? Didn't work either though. Thanks, Tom PS Unfortunately, I have to run. I'll be looking at this again this weekend though. ----------------------------------------------------------------------- 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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Changes I made to get boost::pool code to compile/execute under CW 8.1
by Ray S. Gallimore 12 Aug '02

12 Aug '02

Here is what I did to get boost::pool to compile/execute on CW 8.1: test_pool_alloc.cpp ============= 1) To execute w/o memory access violations, define BOOST_NO_PROPER_STL_DEALLOCATE sys_allocator.hpp =========== 1) To compile, change signature of allocate in both allocators from: static pointer allocate(const size_type n, const pointer = 0) to: static pointer allocate(const size_type n, const void* = 0) 2) To get time_pool_alloc.cpp to execute w/o memory access violations, change definition of new_delete_allocator from: { delete [] p; } to: { delete [] (char*)p; } Ray Gallimore

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Why does BGL use friend instead of member functions?
by Louis Lavery 11 Aug '02

11 Aug '02

Hi, It appears, to me, that the boost graph classes use friend functions and apposed to member functions. What are the reasons for this design decision (I like it) and why is the graph passed as the last argument? Thanks, Louis. PS. Great graph - great book.

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