June 2003 - Boost-users - lists.preview.boost.org

boost::filesystem build in MS Visual Studio .NET 2003
by Stuart C. Schaffner 23 Jun '03

23 Jun '03

Sorry if this is a repost. I am having trouble with my mail system. I tried to build the boost libraries per the instructions on "Building Boost Libraries" at www.boost.org, but most of the builds failed. I did set up the two variables for msvc. However, I noticed that vcvars32.bat is not in the directory that the build script specifies. I can fix this, but I suspect that other things are also in different places in .NET 2003. Any suggestions? Stu Schaffner The MITRE Corp.

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Passing shared_ptr to function that creates obj that shared_ptr points to
by Drew 23 Jun '03

23 Jun '03

[Moderator's note: The only apparent connection this message has to Boost is in the subject line. I am approving it on the assumption that the missing declarations for ParentPtr and DerivedPtr are typedefs using boost::shared_ptr.] Hello everyone... I am attempting to do the following: class Parent { public: int m_value; }; class Derived : public Parent { }; void Fn(ParentPtr& pObj) { pObj = ParentPtr(new Parent()); pObj->m_value = 10; } int main() { ParentPtr pParent; DerivedPtr pDerived; Fn(pDerived); return 0; } If I pass the parent pointer, it compiles and works fine. If I pass the derived pointer I get: error C2664: 'Fn' : cannot convert parameter 1 from 'DerivedPtr' to 'ParentPtr &' Does anyone know how to solve my problem? TIA, Drew

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[BGL] negative_edge thrown inside dijsktra for boost' file dependency example.
by Dan Dimerman 23 Jun '03

23 Jun '03

Hello, The problem I'm having is that I get an exception thrown when I run the example related to File precedency on parallel compilation, using dijkstra algorithm. I mean, there's no code of mine at all, so that reduces the probabilities of it being me to a 75%... ;) thanks...

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Signals library safety
by Eugene Talagrand  22 Jun '03

22 Jun '03

Hello to all, I'm looking into using the Boost.Signals. The library claims not to be thread safe. What does this mean exactly? When using Boost.Threads, can I make concurrent calls to connect as long as I wrap each call in a Mutex? If this is possible, do tackable objects also still work (if two trackable objects get destroyed in two different threads there might be a problem from what I understand) On an different note, I am trying to use Boost.Signals for network event handling. I'd like to set it up so that it uses something similar to he JavaScript event model, where every slot returns a boolean value. If that value is false, the remaining slots are not called. Would anyone have any recommendations on how to do this? Should I wrap each slot in a function that takes the return value and sets a global flag, then every subsequent slot checks the flag? It looks like combiners would not be appropriate, as it appears they are used after each slot is called (unless the InputIterator' opeator* actually calls the slot??) Thanks for any help -Eugene

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FW: [Spirit-general] RE: [Boost-Users] boost::spirit and asts
by HartmutKaiser＠t-online.de 22 Jun '03

22 Jun '03

-----Original Message----- From: Giovanni Bajo [mailto:giovannibajo@libero.it] Sent: Sunday, June 22, 2003 1:39 AM To: Hartmut Kaiser Subject: Fw: [Spirit-general] RE: [Boost-Users] boost::spirit and asts You may want to forward this to boost-users, the mail bounced because I'm not subscribed to it. Giovanni Bajo Giovanni Bajo <giovannibajo(a)libero.it> wrote: > Hartmut Kaiser <hartmutkaiser(a)t-online.de> wrote: > > >>> [AST] >>> a problem -- I can't seem to figure out how to put right-to-left >>> associative operators into the tree properly. I had this as a guess, >>> but I'm really not sure: r = value | value >> root_node_d[ch_p('=')] >>> >> r; > >> Meanwhile I'll >> forward this message to the Spirit mailing list, maybe somebody >> remebers it. Giovanni? > > > The proposed code should work as expected wrt tree generation, but you need > to left-factor it to make it actually work: > > r = value >> !(root_node_d[ch_p('=')] >> r); > > Giovanni Bajo > > > > ------------------------------------------------------- > This SF.Net email is sponsored by: INetU > Attention Web Developers & Consultants: Become An INetU Hosting > Partner. Refer Dedicated Servers. We Manage Them. You Get 10% Monthly > Commission! INetU Dedicated Managed Hosting > http://www.inetu.net/partner/index.php > _______________________________________________ > Spirit-general mailing list > Spirit-general(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/spirit-general

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enable_if part of boost ?
by Anders Moe 22 Jun '03

22 Jun '03

Hi all. After reading about enable_if in CUJ I decided to see if this was present in boost, which it is, sort of, in function_base.hpp. However, it seems to exist in function::, and my impression is that its not really an official boost component. Is this correct ? Regards, Anders.

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boost::thread and .NET
by Bruno Martínez 22 Jun '03

22 Jun '03

Hello, I was wondering what outcome to expect from mixing .NET managed c++ and boost::thread. According to ms's docs a c++ application compiles for .net unchanged, but what kind of api can it expect? What may happen if I try to execute .net code in a thread created by boost::thread? Thanks in advance, Bruno Martinez ------------------------------------------------------ Internet en Uruguay es http://www.internet.com.uy

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boost::spirit and asts
by Dan Nuffer 21 Jun '03

21 Jun '03

Hi, I'm trying to write a grammar for a scripting language, and to do this I'm building an AST of each expression. I have this working fine, for the most part, but I've run into a problem -- I can't seem to figure out how to put right-to-left associative operators into the tree properly. I had this as a guess, but I'm really not sure: r = value | value >> root_node_d[ch_p('=')] >> r; _____________________________________________________________ <a href="http://www.gamedev.net">GameDev.net Email Service</a> - "Plenty of 1's and 0's" _____________________________________________________________ Select your own custom email address for FREE! Get you(a)yourchoice.com, No Ads, 6MB, IMAP, POP, SMTP & more! http://www.everyone.net/selectmail?campaign=tag

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Using Ublas for eigenvalue problems.
by Amit Bhatia 20 Jun '03

20 Jun '03

Hello everyone, I am working on trying to use ublas for finding the eigenvalues and eigenvectors of a positive definite matrix. I am not too sure whether this can be done in ublas. I have seen that there are calls for solving system of equations as well as doing rank updates, but still am not sure whether this could be done "safely" (eigenvalues getting close to zero) and efficiently ? I have read at a couple of places the advice' of using prewritten routines for this rather than trying to write one's own for this non trivial problem. I am a newbie! Any advice/suggestion/past experience with the same will be most welcome. regards, amit.

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BGL: Immutable vertex/edge descriptors?
by Tarjei Knapstad 19 Jun '03

19 Jun '03

If I use vecS for EdgeList and/or VertexList, whenever I remove a edge/vertex this also affects any vertex/edge with a higher numbered descriptor, i.e. removing vertex 0 results in subtracting 1 from every other vertex descriptor. I'm making a graphical editor for a structure that is represented as a graph, and to quickly determine which vertex/edge is selected and should be edited in any way I figure the best way is to keep a copy of the edge/vertex descriptor with the graphical object that is supposed to represent just that edge/vertex. If I use vecS this soon becomes a real pain if I have to update edge/vertex descriptors everywhere whenever I remove some part of the graph. I could of course add my own immutable descriptors as properties in the graph, but that just reverses the problem - I'll have to map these back to the 'real' descriptors when I want to modify/access the graph. I assume I can use listS to store both edges and vertices to solve this problem in that the descriptors become pointers which are not disturbed when I remove a vertex/edge? What about setS? If I go with listS I end up with another concern regarding the performance benchmarks on traversal in the BGL book. Is the code used to create those benchmarks available anywhere so that I can do a re-evaluation with later compiler versions? I hope someone can shed some light here. Thanks, -- Tarjei

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gcc3.2.3 regex STLPort-4.5.3
by david 19 Jun '03

19 Jun '03

Hi, I have some undefined references (see below). It looks like I have to use a compiler definition? Is it possible to use regex with gcc.3.2.3? In function `bool boost::re_detail::query_match_aux undefined reference to `boost::reg_expression<char, boost::regex_traits<char>, _STL::allocator<char> >::~reg_expression [in-charge]()' ( in function: In function `bool boost::re_detail::query_match_aux<char const*, _STL::allocator<char>, char, boost::regex_traits<char>, _STL::allocator<char> >(char const*, char const*, boost::match_results<char const*, _STL::allocator<char> >&, boost::reg_expression<char, boost::regex_traits<char>, _STL::allocator<char> > const&, unsigned, boost::re_detail::_priv_match_data<char const*, _STL::allocator<char> >&, char const**)': ) Bye

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_MSC_VER not defined on mingw32
by omnizionic 19 Jun '03

19 Jun '03

I downloaded and unzipped the latest boost (1.30.0) and tried using it in a simple file like this: #include <boost/smart_ptr.hpp> int main() { boost::shared_ptr<int> p(new int); return 0; } I compiled it, and got the following output: gcc -c -Wall -W -Werror -Wundef -Wfloat-equal -Wshadow -Wpointer-arith -Wcast-qual -Wwrite-strings -Wconversion -idirafter c: /programming/lib/kakefisk -Ic:/programming/boost_1_30_0 -O3 -fomit-frame-pointer -ffast-math btest.cpp -o btest.o In file included from c:/programming/boost_1_30_0/boost/scoped_ptr. hpp:16, from c:/programming/boost_1_30_0/boost/smart_ptr.hpp: 17, from btest.cpp:1: c:/programming/boost_1_30_0/boost/checked_delete.hpp:4:5: "_MSC_VER" is not defined In file included from c:/programming/boost_1_30_0/boost/shared_ptr. hpp:26, from c:/programming/boost_1_30_0/boost/smart_ptr.hpp: 19, from btest.cpp:1: c:/programming/boost_1_30_0/boost/throw_exception.hpp:4:5: "_MSC_VER" is not defined In file included from c:/programming/boost_1_30_0/boost/shared_ptr. hpp:27, from c:/programming/boost_1_30_0/boost/smart_ptr.hpp: 19, from btest.cpp:1: c:/programming/boost_1_30_0/boost/detail/shared_count.hpp:4:5: "_MSC_VER" is not defined In file included from c: /programming/boost_1_30_0/boost/detail/shared_count.hpp:27, from c:/programming/boost_1_30_0/boost/shared_ptr. hpp:27, from c:/programming/boost_1_30_0/boost/smart_ptr.hpp: 19, from btest.cpp:1: c:/programming/boost_1_30_0/boost/detail/lightweight_mutex.hpp:4:5: "_MSC_VER" is not defined In file included from c: /programming/boost_1_30_0/boost/detail/lightweight_mutex.hpp:68, from c: /programming/boost_1_30_0/boost/detail/shared_count.hpp:27, from c:/programming/boost_1_30_0/boost/shared_ptr. hpp:27, from c:/programming/boost_1_30_0/boost/smart_ptr.hpp: 19, from btest.cpp:1: c:/programming/boost_1_30_0/boost/detail/lwm_nop.hpp:4:5: "_MSC_VER" is not defined In file included from c:/programming/boost_1_30_0/boost/smart_ptr.hpp: 19, from btest.cpp:1: c:/programming/boost_1_30_0/boost/shared_ptr.hpp:390:60: "BOOST_MSVC" is not defined mingw32-make.exe: *** [btest.o] Error 1 I also tried compiling after setting the following in <boost/config/user.hpp> with no apparent effect: // define this to locate a compiler config file: #define BOOST_COMPILER_CONFIG <boost/config/compiler/gcc.hpp> // define this to locate a stdlib config file: #define BOOST_STDLIB_CONFIG <boost/config/stdlib/libstdcpp3.hpp> // define this to locate a platform config file: #define BOOST_PLATFORM_CONFIG <boost/config/platform/win32.hpp> Does anyone have any ideas as to where the problem might lie?

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Newbie: typle_basic.hpp gives compilation error.
by somlin71 19 Jun '03

19 Jun '03

(Trying to use the tuple function for the first time.) When adding #include "boost/tuple/tuple_comparison.hpp" a compilation gives the following errors: [C++ Error] tuple_basic.hpp(158): E2434 Template declaration missing template parameters ('template<...>') [C++ Error] tuple_basic.hpp(158): E2238 Multiple declaration for 'element<N,T>' [C++ Error] tuple_basic.hpp(143): E2344 Earlier declaration of 'element<N,T>'

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Re: Newbie COMPILATION PROBLEM
by louis.lebrun＠free.fr 19 Jun '03

19 Jun '03

Thanks for your reply. But in fact since I download BOOST 1.30, the problem didn't occure anymore. Louis -----Message d'origine----- De : gbiddison [mailto:gbiddison@velocity11.com] Envoyé : mercredi 18 juin 2003 18:49 À : Boost-Users(a)yahoogroups.com Objet : [Boost-Users] Re: Newbie COMPILATION PROBLEM Hi, I've seen this problem while trying to include boost\python.hpp in a recent project. The problem only seemed to occur for me if I included boost\python.hpp in the precompiled header file (stdafx.h). If I moved the #include so that it wasn't precompiled, the INTERNAL COMPILER ERROR (I have an english version of MSVC7) disappeared. Could this be the problem you are experiencing? Does anyone know of a better solution for this? It would be nice to be able to precompile boost headers ... Giles --- In Boost-Users(a)yahoogroups.com, "lebrun_l" <louis.lebrun@f...> wrote: > Hi All, > > I'am using > Microsoft Visual C++ .NET 7.0 > > I can't manage to compile a single example from the graph library. > > I get the following message : > > c:\BGL\boost_1_25_1\boost\type_traits\cv_traits.hpp(188): fatal > error C1001: ERREUR INTERNE DU COMPILATEUR > (fichier du compilateur 'msc1.cpp', ligne 2844) > Choisissez la commande Support technique du menu ? (Aide) > de Visual C++ > ou ouvrez le fichier d'aide du Support technique pour plus > d'informations > > Thank's in advance for your help. > > Louis

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RE: [Boost-Users] RE: A newbie question.
by Jim.Hyslop 18 Jun '03

18 Jun '03

Amit Bhatia wrote: > Thanks Jim, > I have another doubt which is due to my lack of any previous > experience > with things like templates(Well I am seeing the kind of > programming used in > BOOST for the first time :( ). I was looking at the random > number library, > and it mentions IntType a number of times. I can't figure out > where to look > for it? So is it a generic thing or is it part of some other > BOOST library. It's right under your nose, as they say ;=) The IntType is a parameter to the template, so it's whatever you tell the compiler you want it to be. Taking a snip at (ahem) random from one of the files: template<class IntType, IntType a, IntType c, IntType m> class linear_congruential { public: typedef IntType result_type; static const IntType multiplier = a; static const IntType increment = c; static const IntType modulus = m; static const bool has_fixed_range = true; static const result_type min_value; static const result_type max_value; explicit linear_congruential_fixed(IntType x0 = 1); // compiler-generated copy constructor and assignment operator are fine void seed(IntType x0); IntType operator()(); }; At this point, we don't know exactly what an "IntType" is. However, on the next lines: typedef random::linear_congruential<long, 16807L, 0, 2147483647L, 1043618065L> minstd_rand0; typedef random::linear_congruential<long, 48271L, 0, 2147483647L, 399268537L> minstd_rand; These typedefs provide typedefs that fix IntType as a long, with the various parameters converted to long. More detailed explanation about templates is beyond the scope of this list - it's really quite a basic topic. I'd suggest picking up a good C++ tutorial book. Koenig and Moo's "Accelerated C++" comes highly recommended (I haven't read it myself, but I have yet to hear a negative review of it). -- Jim

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RE: [Boost-Users] A newbie question.
by Jim.Hyslop 18 Jun '03

18 Jun '03

Amit Bhatia wrote: > I have just downloaded boost 1.3.0 a couple of days ago. Welcome! > While going > through the documentation I read that it is not necessary to build > the library, completely. [...] > I have this doubt that is it equally good practice to just > include the > .hpp files rather than building the whole libary. For most of the Boost library items, the header *IS* the entire library (that's the power of templates for you :-) The exceptions are the Python, Regex, Signal and Thread libraries - those you need to build. More details are at http://www.boost.org/tools/build/index.html > Also was just wondering if there are seperate disc groups > for each set of > libaries like numerics/math in one place ? There are separate lists for Python and the Boost.build system (details at http://www.boost.org/more/mailing_lists.htm) Other than that, everything goes through here. -- Jim

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A newbie question.
by Amit Bhatia 18 Jun '03

18 Jun '03

Hi, I have just downloaded boost 1.3.0 a couple of days ago. While going thropugh the documentation I read that it is not necessary to build the library, completely. As of now the uBLAS and the random number library seem to be most useful to me. I have this doubt that is it equally good practice to just include the .hpp files rather than building the whole libary. Does it mean a very messy code, and a rather very different way of compilation, etc ? Also was just wondering if there are seperate disc groups for each set of libaries like numerics/math in one place ? Thanks, amit.

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Newbie COMPILATION PROBLEM
by lebrun_l 18 Jun '03

18 Jun '03

Hi All, I'am using Microsoft Visual C++ .NET 7.0 I can't manage to compile a single example from the graph library. I get the following message : c:\BGL\boost_1_25_1\boost\type_traits\cv_traits.hpp(188): fatal error C1001: ERREUR INTERNE DU COMPILATEUR (fichier du compilateur 'msc1.cpp', ligne 2844) Choisissez la commande Support technique du menu ? (Aide) de Visual C++ ou ouvrez le fichier d'aide du Support technique pour plus d'informations Thank's in advance for your help. Louis

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RE: [Boost-Users] Re: Regex in a service..
by Koss, Loren 18 Jun '03

18 Jun '03

Thanks to all for helping. As soon as I changed the account of the service, it worked which led me to believe it just wasn't finding the DLL, which in fact was the problem. All is working now. Thanks for all the great help and ideas! Loren -----Original Message----- From: Jeff Garland [mailto:jeff@crystalclearsoftware.com] Sent: Tuesday, June 17, 2003 3:38 PM To: Boost-Users(a)yahoogroups.com Subject: RE: [Boost-Users] Re: Regex in a service.. On Mon, 16 Jun 2003 09:05:57 -0700, Koss, Loren wrote > The service can start and I can attach and run through it, but if I > uncomment it (which is what I need to do), essentially it > IMMEDIATELY fails with a ERROR 1053: The service did not respond to > the start or control request in a timely fashion. Is it possible > that its not finding the proper libraries or a permissions problem > is happening? Windows services have to respond to the Windows Service Control Manager (SCM) within a certain amount of time (a few seconds as I recall) or the SCM will assume the start has failed. How long is your Regex taking? Perhaps you should put the Regex in another thread so that your SCM responses are timely.... HTH, Jeff Yahoo! Groups Sponsor <http://us.adserver.yahoo.com/l?M=247865.3456232.4744922.1261774/D=egroupmai l/S=:HM/A=1482387/rand=728390785> Info: <http://www.boost.org <http://www.boost.org> > Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl <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! <http://docs.yahoo.com/info/terms/> Terms of Service. [Non-text portions of this message have been removed]

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Python and hello.World class example
by David Brownell 18 Jun '03

18 Jun '03

I am trying to run the hello.World class example in the tutorial and am running into problems. I can compile the dll fine, and then copy the dll (and the boost_python.dll) into my python directory, and then start my Python interpreter. The library will import, but when I call either the greet or set methods, I get the following errors from within the Python interpreter: [greet]: Traceback (most recent call last): File "<interactive input>", line 1, in ? TypeError: unbound method Boost.Python.function object must be called with World instance as first argument (got str instance instead) [set]: Traceback (most recent call last): File "<interactive input>", line 1, in ? TypeError: unbound method Boost.Python.function object must be called with World instance as first argument (got nothing instead) I am failrly new to Python and even newer to Boost.Python, so there may be something very basic that I am missing. I am using boost 1.30, bjam to compile, MSVC 7.1, Python 2.2, and Windows XP. Note that I can compile and successfully execute the inital Hello World example (hello.cpp in the tutorial subdir). Thanks in advance for your help! David Brownell

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Link Problem with filesystem lib test program.
by Adalbert Perbandt 18 Jun '03

18 Jun '03

Hi there, I'm trying to get the boost::filesystem library working on Sun SPARC Solaris 7 with the Sun forte 6.2 compiler. ---------------------------------------------------------------------- $ cd boost_1_30_0/libs/filesystem/test $ bjam -sTOOLS=sunpro -sBOOST_ROOT=/opt/boost_1.30.0 [...] sunpro-Link-action ../../../libs/filesystem/test/bin/convenience_test.test/sunpro/debug/runtime-link-dynamic/convenience_test Undefined first referenced symbol in file boost::__RTTI__1nFboostPchecked_deleter4n0AKfilesystemSdirectory_iteratorLdir_itr_imp___ ../../../libs/filesystem/build/bin/libboost_filesystem.a/sunpro/debug/runtime-link-dynamic/libboost_filesystem.a(9dK8jJofKplZFEI9d1QA.o) [Hint: static member boost::__RTTI__1nFboostPchecked_deleter4n0AKfilesystemSdirectory_iteratorLdir_itr_imp___ must be defined in the program] ld: fatal: Symbol referencing errors. No output written to ../../../libs/filesystem/test/bin/convenience_test.test/sunpro/debug/runtime-link-dynamic/convenience_test CC -o "../../../libs/filesystem/test/bin/convenience_test.test/sunpro/debug/runtime-link-dynamic/convenience_test" -xildoff -g "../../../libs/filesystem/test/bin/convenience_test.test/sunpro/debug/runtime-link-dynamic/convenience_test.o" "../../../libs/filesystem/build/bin/libboost_filesystem.a/sunpro/debug/runtime-link-dynamic/libboost_filesystem.a" "../../../libs/filesystem/build/bin/libboost_filesystem.a/sunpro/debug/runtime-link-dynamic/libboost_filesystem.a" ...failed sunpro-Link-action ../../../libs/filesystem/test/bin/convenience_test.test/sunpro/debug/runtime-link-dynamic/convenience_test... ...skipped <libs!filesystem!test/path_test.test/sunpro/debug/runtime-link-dynamic>path_test.run for lack of <libs!filesystem!test/path_test.test/sunpro/debug/runtime-link-dynamic>path_test... ...skipped <libs!filesystem!test/operations_test.test/sunpro/debug/runtime-link-dynamic>operations_test.run for lack of <libs!filesystem!test/operations_test.test/sunpro/debug/runtime-link-dynamic>operations_test... execute-test ../../../libs/filesystem/test/bin/fstream_test.test/sunpro/debug/runtime-link-dynamic/fstream_test.run **passed** ../../../libs/filesystem/test/bin/fstream_test.test/sunpro/debug/runtime-link-dynamic/fstream_test.test ...skipped <libs!filesystem!test/convenience_test.test/sunpro/debug/runtime-link-dynamic>convenience_test.run for lack of <libs!filesystem!test/convenience_test.test/sunpro/debug/runtime-link-dynamic>convenience_test... ...failed updating 3 targets... ...skipped 6 targets... ...updated 33 targets... ---------------------------------------------------------------------- Is my assumption correct that this again is a consequence of a failure in Sun's forte 6 update 2 compiler? Is there any known workaround for this? Regards, Adalbert Perbandt.

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Newbie: BGL: g++ -O2 or -O3 gives wrong numbers
by michael_wangzy 18 Jun '03

18 Jun '03

HI, I start looking at the Graph library and try the quick_tour.cpp on my machine. Here is something wrong I found out > gcc --vesion gcc (GCC) 3.3 (Gentoo Linux 1.4, PVR 3.3) > g++ -o test -O2 quick_tour.cpp > ./test vertices(g) = A B C D E edges(g) = (A,B) (A,D) (C,A) (D,C) (C,E) (B,D) (D,E) vertex: 0 out-edges: (0,134545512) (0,134545536) in-edges: (2,0) adjacent vertices: 134545512 134545536 vertex: 1 out-edges: (1,134545632) in-edges: (0,1) adjacent vertices: 134545632 vertex: 2 out-edges: (2,134545560) (2,134545608) in-edges: (3,2) adjacent vertices: 134545560 134545608 vertex: 3 out-edges: (3,134545584) (3,134545656) in-edges: (0,3) (1,3) adjacent vertices: 134545584 134545656 vertex: 4 out-edges: in-edges: (2,4) (3,4) adjacent vertices: digraph G { graph [ rankdir="LR", ratio="fill", size="3,3"]; node [ shape="circle"]; 0[label="A"]; 1[label="B"]; 2[label="C"]; 3[label="D"]; 4[label="E"]; 0->1 [label="1.2"]; 0->3 [label="4.5"]; 2->0 [label="2.6"]; 3->2 [label="0.4"]; 2->4 [label="5.2"]; 1->3 [label="1.8"]; 3->4 [label="3.3"]; } Note: the large numbers in the out-edges , like 134545512. Expected numbers are 0,1,2,3,4. Seems some fields are not initilized but read. Note: I tried gcc-3.2.3 and got same results Note: Without -O2 it is fine. My newbie questions are: 1) Is it compiler issue or BGL issue? Cannot we use optimization of gcc when using BGL? 2) I suppose gcc3.3 is good so if this is an BGL issue, where could the thing go wrong? How to fix it? Thanks, Michael

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RE: [Boost-Users] Re: Regex in a service..
by Koss, Loren 17 Jun '03

17 Jun '03

Okay, I now know how to attach to a process - cool! Thanks for that.. However, it looks like when I comment out the following: Regex expression(strMask); The service can start and I can attach and run through it, but if I uncomment it (which is what I need to do), essentially it IMMEDIATELY fails with a ERROR 1053: The service did not respond to the start or control request in a timely fashion. Is it possible that its not finding the proper libraries or a permissions problem is happening? Thanks Loren -----Original Message----- From: Mark Sizer [mailto:yg-boost-users@m.gmane.org] Sent: Saturday, June 14, 2003 6:48 PM To: boost-users(a)yahoogroups.com Subject: [Boost-Users] Re: Regex in a service.. Yes, you can debug it. After starting the service, open the Task Manager and get the process ID. Then type "msdev -p <pid>" on a command line. If the error happens too quickly (e.g. on startup), put an infinite loop at the very start and break out of it with the debugger. int i=1; while (i > 0 ); is my favorite. Just change i to zero and everything starts going as normal (just don't forget to take it out!). Good Luck, - Mark P.S. I'm using regex in a service and it's working fine (at least I assume it is, nothing noticably bad has happened). MSVC 6, boost_1_30_0, W2K AS and W2K Pro. Koss, Loren wrote: > John, > > Thanks for the response. How do you deal with breakpoints within a service? > I'm compiling then starting the service from the service control manager. > Will I still be able to debug it? >>I seem to be having a difficult time using the Regex class in a >>service. It works wonderfully in a regular app. Can anyone help me >>out.. Basically, instantiating a regex class raises an exception. >>Any thoughts? >> > > Not unless you can tell me what exception and where - if you're using the vc > ide then set it to break on OS and C++ exceptions. > > John. Yahoo! Groups Sponsor <http://us.adserver.yahoo.com/l?M=247865.3425083.4707139.1261774/D=egroupmai l/S=:HM/A=1482387/rand=217687422> Info: <http://www.boost.org <http://www.boost.org> > Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl <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! <http://docs.yahoo.com/info/terms/> Terms of Service. [Non-text portions of this message have been removed]

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RE: [Boost-Users] to_simple_string and Windows?
by Tom Matelich 17 Jun '03

17 Jun '03

Sorry, I didn't read carefully enough. Have you managed to make a test app fail similarly? tom > -----Original Message----- > From: adutoit [mailto:adutoit@stonethree.com] > Sent: Tuesday, June 10, 2003 11:02 PM > To: Boost-Users(a)yahoogroups.com > Subject: Re: [Boost-Users] to_simple_string and Windows? > > > Yes, I know about the UNICODE project option, that is why I > mentioned it in > my previous email... > Anyway, now I am left wondering why opto enabled (with /O3 or > whatever opto > is required) causes my call to "to_simple_string" to fail. > In case anyone > is wondering what I mean by that, it simply aborts without any further > information somewhere in the bowels of said function. > > A. ----------------------------------------------------------------------- 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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Maximum flow algorithms for interactive application
by Kai-Peter B�ckman 17 Jun '03

17 Jun '03

Hello fellow Boost users, I have been using the boost.graph library in an interactive application for solving the maximum flow problem using the push_relabel algorith. The application consists of the user building the graph network interactively, node by node and edge by edge. Currently the maximum flow for the whole system is recalculated after each change. In addition to the total maximum flow the individual flows in all edges are used by the application. The problem is that interactivity is lost when the amount of nodes approaches 10k with the number of edges varying between 20k-40k. My question is: Is there an algorithm that would let me quickly calculate the changed maxium flow solution after each change without needing to do the global calculations again? The idea here would be to amortize the running time over each interactive change and thus keep response times acceptable (<200ms). My intuition tells me something like this should be possible, but I don't want to reinvent the wheel. Thank you in advance. If someone replies by email I will summarize to the group. Have a nice summer. -- Kai-Peter Bäckman, kai-peter.backman(a)mistaril.com http://www.mistaril.com - Space Station Manager - PC strategy game

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