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uBLAS: Bug in zero_vector.
by David Jung 08 Sep '02

08 Sep '02

Hi. The online documentation for zero_vector<> says: zero_vector<T> Constructs a zero vector. v (size) However, line 786 of boost/numeric/ublas/vector.hpp from latest CVS reads: zero_vector (size_type size, size_type index): size_ (size) {} and there is no single size_type size argument constructor. Isn't this a bug? (looks like a cut-paste from unit_vector<>) Cheers, -David Jung.

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Re: Re: [Boost-Users] Compile problem with boost thread and function libraries.
by Matthew Dempsky 08 Sep '02

08 Sep '02

Nevermind, I'm an idiot... I forgot to add -I/usr/include/stlport to gcc's commandline. =/ -jivera

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Re: Re: Compile problem with boost thread and function libraries.
by Matthew Dempsky 08 Sep '02

08 Sep '02

>Probably a silly question: but you did build libboost_thread with STLport >support turned on didn't you? Well, I didn't actually compile libboost_thread at all - it's prepackaged on Debian. -jivera

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Question about functional operators on bit-ops (~, &, |, ^, +)
by Jeffrey C. Jacobs 08 Sep '02

08 Sep '02

This is more of a newbie question I admit but then that's appropriate here as I understand. :) Really, my question comes down to perhaps ignorance of the ISO spec (need to get around to buying a copy! -- and YES, I know EXACTLY what I'd be getting into! ;) and determine whether this is really just lack of conformance on my compiler's part (you know the one, using Dinkumware 1.0 for 5 years) or an issue addressed by boost. Anyway, cut to the chase: I am looking for unary (binary) functions of this form: // TEMPLATE STRUCT compliment template<class _Ty> struct compliment : std::unary_function<_Ty, _Ty> { inline _Ty operator()(const _Ty& _X) const {return (~_X); } }; // TEMPLATE STRUCT unary_no_op template<class _Ty> struct unary_no_op : std::unary_function<_Ty, _Ty> { inline _Ty operator()(const _Ty& _X) const {return (_X); } }; That is, wrappers for compliment (~), unary positive (+), binary bitwise-and (&), bitwise-or (|) and bitwise-XOR (^) as well as the second concept I listed: the unary_no_op, which though functionally similar to unary "+" is none the less unique in that is really does nothing, where as +_X calls _X.operarot+(). [Yes, I know the "no-op" unary is somewhat silly in its usefulness but I only suggest it for abstraction purposes. I can give an example how it would be useful, but the code would likely be flawed in other senses to I'll reserve that until I need to justify such a construct.] Anyway, so first: Am I just missing something? I don't think the standard defines a "compliment" functional object but if it does, can someone tell me? And if as I believe it's not, given the usefulness of such a template functional object (regardless of boost's Lambda lib), where would I find the definition in boost of such functors listed above? If it's not defined, is there any reason we'd not like to see such an operator standardized? I mean, I'd be happy to do the trivial work of create such a list for boost but then I can only believe if it was wanted it would have been done. Then again, it's wanted by me so I suppose it's not completely unreasonable to expect it to be here but that's a whole other issue. So is there a standard (std:: or boost::) complement class, bitwise_and, etc. that is NOT confused with the ISO646 definitions? Thanks in advance and hope I was clear and did not offend with this possibly silly question. Jeffrey.

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Compile problem with boost thread and function libraries.
by Matthew Dempsky 08 Sep '02

08 Sep '02

Trying to compile the example at the bottom of the thread_group page (http://www.boost.org/libs/thread/doc/thread.html#example-thread_group) results in the following error for me: undefined reference to `boost::thread_group::create_thread(boost::function0<void, boost::empty_function_policy, boost::empty_function_mixin, allocator<boost::function_base> > const &)' (I also had to rename the variable count to something else because I was getting a "`int count' redeclared as different kind of symbol" error and change boost::mutex::lock to boost::mutex::scoped_lock.) I linked with -lboost_thread -lpthread -lstlport and am using Debian 3.0 with g++ 2.95.4, stlport 4.5.3, and boost 1.27. -jivera

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RE: [Boost-Users] Re: msvc-stlport build problems
by David Resnick 06 Sep '02

06 Sep '02

I've fixed the problem, here's my solution in case anyone else needs it: The problem didn't have to do with the Platform SDK in the end. The configuration that I'm using is MSVC6 SP3 on Windows 2000. The fix was to add : flags msvc-stlport DEFINES : _NTOS_=1 ; to the "special flags for STLport 4.0" block in tools\build\msvc-stlport-tools.jam (line 117, for example). I have a question for jam experts: How can I set this define (_NTOS_=1) from the command line? Regards, David Resnick MobileSpear Inc. -----Original Message----- From: David Abrahams [mailto:yg-boost-users@m.gmane.org] Sent: Friday, August 30, 2002 19:38 To: boost-users(a)yahoogroups.com Subject: [Boost-Users] Re: msvc-stlport build problems "David Resnick" <dresnick(a)mobilespear.com> wrote in message news:DDE1CEBCDCEE614EA25D40FCE8EDD6BD0C48EE@msmail.mobilespear.com... > Hi, > > I'm trying to build boost version 1.28.0, msvc-stlport build, using the > following line: > > bjam -sTOOLS=msvc-stlport -sstlport-iostream=on -sSTLPORT_PATH=c:\etc -sstlport-iostream=on sets a Jam variable called "stlport-iostream" to "on". As a build feature, you need to set this up as a part of the BUILD variable: -sBUILD="<stlport-iostream>on" However, that doesn't appear to be related to the warnings you're reporting. > I have no problems building the msvc build. > > It seems to me that the problem has to do with the MS Platform SDK that > I have installed. Quite possibly. > When compiling STLPort (version 4.5.3) I had similar warnings. 2 work > arounds that I found there were either to remove the platform SDK from > the include enviroment variable, or (when I found it) to define > _STLP_NEW_PLATFORM_SDK in stl_user_config.h. > > I've tried variations of that with compiling Boost, but nothing makes a > difference. I've included the error messages that I get for most files. > > ---------------------------- CUT HERE ---------------------------- > vc-C++ > libs\regex\build\bin\libboost_regex.lib\msvc-stlport\debug\runtime-link- > dynamic\stlport-cstd-namespace-std\stlport-ios > tream-off\stlport-version-4.5.3\c_regex_traits.obj > c_regex_traits.cpp > C:\PROGRA~1\MICROS~3\VC98\include\winbase.h(1011) : error C2733: second > C linkage of overloaded function 'InterlockedIncremen > t' not allowed > C:\PROGRA~1\MICROS~3\VC98\include\winbase.h(1009) : see > declaration of 'InterlockedIncrement' > C:\PROGRA~1\MICROS~3\VC98\include\winbase.h(1018) : error C2733: second > C linkage of overloaded function 'InterlockedDecremen > t' not allowed > C:\PROGRA~1\MICROS~3\VC98\include\winbase.h(1016) : see > declaration of 'InterlockedDecrement' > C:\PROGRA~1\MICROS~3\VC98\include\winbase.h(1026) : error C2733: second > C linkage of overloaded function 'InterlockedExchange > ' not allowed > C:\PROGRA~1\MICROS~3\VC98\include\winbase.h(1023) : see > declaration of 'InterlockedExchange' > > > "cl" /Zm400 -nologo -GX -c -DBOOST_REGEX_NO_LIB=1 > -DBOOST_REGEX_STATIC_LINK=1 -D_STLP_NO_SGI_IOSTREAMS=1 -D_STLP_DO_IMP > ORT_CSTD_FUNCTIONS=1 -D_STLP_DEBUG=1 -D_STLP_DEBUG_UNINITIALIZED=1 > -D_STLP_NEW_PLATFORM_SDK=1 /Z7 /Od /Ob0 /GX /GR /MDd -I > "libs\regex\build" -I"C:\etc\boost_1_28_0" > -I"c:\etc\STLport-4.5.3\stlport" -I"C:\PROGRA~1\MICROS~3\VC98\include" > -Fo"libs > \regex\build\bin\libboost_regex.lib\msvc-stlport\debug\runtime-link-dyna > mic\stlport-cstd-namespace-std\stlport-iostream-off\s > tlport-version-4.5.3\c_regex_traits.obj" > -Tp"libs\regex\build\../src\c_regex_traits.cpp" > > ...failed vc-C++ > libs\regex\build\bin\libboost_regex.lib\msvc-stlport\debug\runtime-link- > dynamic\stlport-cstd-namespace-std\s > tlport-iostream-off\stlport-version-4.5.3\c_regex_traits.obj... > ---------------------------- CUT HERE ---------------------------- > > Thanks in advance, > > David Resnick > MobileSpear Inc. -- ----------------------------------------------------------- David Abrahams * Boost Consulting dave(a)boost-consulting.com * http://www.boost-consulting.com Yahoo! Groups Sponsor ADVERTISEMENT <http://rd.yahoo.com/M=233351.2287382.3722243.2225243/D=egroupweb/S=1705 006788:HM/A=1212975/R=0/*http://www.gotomypc.com/u/tr/yh/grp/300_mapG/g2 2lp?Target=mm/g22lp.tmpl> Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> . [Non-text portions of this message have been removed]

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Exposing static members using boost.python
by sashan 06 Sep '02

06 Sep '02

Hi Is the correct way to expose static members by writing a wrapper function for them? For example void wrap_fn() { Class::fn(); } . . . this_module.def(wrap_fn, "fn"); Thanks in advance Sashan

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array.hpp problem with msvc7 and stlport
by li_lirong 06 Sep '02

06 Sep '02

I got many errors with boost\array.hpp after I chaged to use stlport instead of the one from msvc7. one of these errors is: d:\cpplibs\boost\boost\array.hpp(61) : error C2039: '_Ptrit' : is not a member of '_STL' I have tried to config stlport with STLP_NO_OWN_NAMESPACE and _STLP_DONT_RENAME_STD but the errors still exist. Is it a bug in array.hpp or stlport? Regards, Lirong

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ref. to object functions from threads
by Luis De la Parra 06 Sep '02

06 Sep '02

hi all, is there a way to get a reference to the function object used by a boost::thread object?? when you create a new thread and feed it a function object it copies it and then starts a new thread of execution on this object.. well, I would like to send messages to the object in which the thread is running but I don't know how to do it with boos.threads... is there a way to tell boost:thread not to copy the function object but to use it directly?, or to ask the thread object to give a reference to the object? I am now doing a dirty hack which consists of the object putting itself (a pointer) in a static chained list during construction and remove itself in the destructor, this way I can call a static member function which returns this list to get a hold of the object. There is also a static mutex protecting this list to make sure no other objects are created / destructed while one of them is inserting or removing itself from the list. it is working, but I don't think this is a very "clean" approach.. does anyone have any ideas how it could be done better?? thank you. regards, luis.

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n-ary ordered tree template in boost ??
by Marc Cromme 06 Sep '02

06 Sep '02

Dear Boost Members I was wondering if there is an n-ary ordered tree template in boost, something like template <size_t N, class Type, class Alloc = allocator<Type > > class NTree which is a standard container, and a reversible container, ordered by level. That is, first element is root, next series of elements are childs of roots, next series are grandchilds of root , and so on. This way one could parse level by level like a reversible container. There should be the obvious member functions for inserting/deleting child nodes and subtrees. As far as I can see, there is not such a template in boost, but the question is then: 1) can it be emulated using the grah library ?? or 2) is there already an proposal/prototype for such a thing ?? or 3) would it be interesting to include such a thing in boost ?? your's sincierely, Marc Cromme

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