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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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Bad rules in bjam
by Lev Assinovsky 10 Aug '02

10 Aug '02

Hi folks! I found out that two major rules (from "allyourbase.jam") differ from classic Jam and can't work with full power (with gcc on solaris8-x86 at least). * Thus 'EXE' rule doesn't allow you linking with 3-rd party library (flag LINKFLAGS is ignored). * 'Main' rule skips compilation phase, though it's declared in the same allyourbase.jam: # Main image : source ; link executable from compiled sources Anyone experienced this? P.S. I had to built bjam since distribution doesn't have a pre-built version for solaris8-x86. ---- 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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Getting the hang of Boost::Bind
by Tom Matelich 09 Aug '02

09 Aug '02

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 ??? ? Thanks, Tom ----------------------------------------------------------------------- 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] Getting the hang of Boost::Bind
by Tom Matelich 09 Aug '02

09 Aug '02

> -----Original Message----- > From: Duane Murphy [mailto:duanemurphy@mac.com] > Sent: Friday, August 09, 2002 3:23 PM > To: Boost Users > Subject: Re: [Boost-Users] Getting the hang of Boost::Bind > > > --- At Fri, 9 Aug 2002 15:08:06 -0700, 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 ??? ? > > Nothing. Your done. :-) bind takes a pointer to a function > (among other > things) as the first parameter. It then calls that function with the > parameters you specify. You use _1, etc for parameters that > are input to > bind. In your case: > > std::find_if(begin, end, boost::bind(std::equal<std::string>, > name_to_find, _1))); > But I have to compare name_to_find to the result of _1.getName() don't I? ----------------------------------------------------------------------- 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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Signals - no linking
by michael graves ii 09 Aug '02

09 Aug '02

hey, when trying to run a program using boost::signal i am getting a lot of unresolved errors. [output window] --------------------Configuration: my_dlls - Win32 Release-------------------- Linking... delegate_main.obj : error LNK2001: unresolved external symbol "public: __thiscall boost::signals::detail::signal_base::~signal_base(void)" (??1signal_base@detail@signals@boost@@QAE@XZ) delegate_main.obj : error LNK2001: unresolved external symbol "protected: __thiscall boost::signals::trackable::~trackable(void)" (??1trackable@signals@boost@@IAE@XZ) delegate_main.obj : error LNK2001: unresolved external symbol "public: void __thiscall boost::signals::connection::disconnect(void)const " (?disconnect@connection@signals@boost@@QBEXXZ) delegate_main.obj : error LNK2001: unresolved external symbol "protected: void __thiscall boost::signals::detail::slot_base::create_connection(void)" (?create_connection@slot_base@detail@signals@boost@@IAEXXZ) delegate_main.obj : error LNK2001: unresolved external symbol "public: __thiscall boost::signals::detail::signal_base_impl::signal_base_impl(class boost::function2<bool,class boost::any,class boost::any,struct boost::empty_function_policy,struct boo st::empty_function_mixin,int> const &)" (??0signal_base_impl@detail@signals@boost@@QAE@ABV?$function2@_NVany@boost@@ V12@Uempty_function_policy@2@Uempty_function_mixin@2@H@3@@Z) delegate_main.obj : error LNK2001: unresolved external symbol "public: class boost::signals::connection __thiscall boost::signals::detail::signal_base_impl::connect_slot(class boost::any const &,class boost::any const &,class std::vector<class boost ::signals::trackable const *,class std::allocator<class boost::signals::trackable const *> > const &)" (?connect_slot@signal_base_impl@detail@signals@boost@@QAE?AVconnection@34@AB Vany@4@0ABV?$vector@PBVtrackable@signals@boost@@V?$allocator@PBVtracka ble@signals@boost@@@std@@@std@@@Z) delegate_main.obj : error LNK2001: unresolved external symbol "public: __thiscall boost::signals::detail::call_notification::~call_notification(void)" (??1call_notification@detail@signals@boost@@QAE@XZ) delegate_main.obj : error LNK2001: unresolved external symbol "public: __thiscall boost::signals::detail::call_notification::call_notification(class boost::shared_ptr<class boost::signals::detail::signal_base_impl> const &)" (??0call_notification@de tail@signals@boost@@QAE@ABV?$shared_ptr@Vsignal_base_impl@detail@signals@boo st@@@3@@Z) delegate_main.obj : error LNK2001: unresolved external symbol "public: __thiscall boost::signals::detail::signal_base_impl::~signal_base_impl(void)" (??1signal_base_impl@detail@signals@boost@@QAE@XZ) Release/my_dlls.exe : fatal error LNK1120: 9 unresolved externals Error executing link.exe. my_dlls.exe - 10 error(s), 0 warning(s) [/output window] so in semi-readable for these are the unresolved symbols: signal_base::~signal_base(void) trackable::~trackable(void) void connection::disconnect(void)const void slot_base::create_connection(void) signal_base_impl::signal_base_impl(class boost::function2<bool,class boost::any,class boost::any,struct boost::empty_function_policy,struct boost::empty_function_mixin,int> const &) connection signal_base_impl::connect_slot(class boost::any const &,class boost::any const &,class std::vector<class boost::signals::trackable const *,class std::allocator<class boost::signals::trackable const *> >const &) call_notification::~call_notification(void) call_notification::call_notification(class boost::shared_ptr<class boost::signals::detail::signal_base_impl> const &) signal_base_impl::~signal_base_impl(void) i downloaded the signals library out of the CVS Repository. i see that some people have gotten signals to work so i guess i'm missing something=( i like this lib a lot (and it saves me from coding it=), but i would have went with a delegate/callback naming scheme instead of signal/slot. i guess that's what find and replace is for=). michael graves ii

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No time/date class in boost?
by Sean Shubin 09 Aug '02

09 Aug '02

I would have expected to find a time/date class in boost. Was it determined to be unnecessary, or is it simply that no one has gotten around to implementing one?

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Regex issue on WIN32
by Rob Reece 09 Aug '02

09 Aug '02

I'm trying to get the regex lib (boost 1.28.0) built on win32 (MSVC v6, stlport 4.5.3). The standard build that is provided with regex appears to work fine and I get the full compliment of regex libraries (debug, static/dynamic, etc.). However, when I attempt to build the credit_card_example file, the link fails with unresolved external symbols. I then added the 13 regex source files to a msdev project along with the credit_card_example source file and linked everything statically (using BOOST_REGEX_STATIC_LINK or whatever it is). That worked fine. So this leads me to believe that something is going on with BOOST_REGEX_DECL macro. I put some #pragma message(...) statements into some headers and determined that the macro is being defined correctly. Is it possible that this macro is missing on some functions/classes or is it more likely a build option or macro issue? The first unresolved symbol I have is boost::re_detail::match_results_base<...>::m_free(...) As I was looking around for that symbol, I discovered in regex.hpp that match_results_base did not have BOOST_REGEX_DECL macro on the class definition. I added it and rebuilt and I ended up with more unresolved symbols. So obviously that isn't the direction to go. I have, however, not been able to find the actual definition of m_free yet (still looking). Thanks -Rob

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