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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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F6U2 anachronisms warnings
by ljohrixxx 16 Jun '03

16 Jun '03

Hello, I get the Anacronism warning from the file is_convertible.hpp line: 293 BOOST_TT_AUX_BOOL_TRAIT_DEF2(is_convertible,From,To, (::boost::detail::is_convertible_impl<From,To>::value)) The warning is: /usr/vobs/ThirdParty/boost/boost_1_30_0/boost/type_traits/is_convertib le.hpp", line 239: Warning (Anachronism): Type names qualified by template parameters require "typename". "/usr/vobs/ThirdParty/boost/boost_1_30_0/boost/type_traits/is_converti ble.hpp", line 239: Warning (Anachronism): Type names qualified by template parameters require "typename". I am using Forte6 U2 compiler on Solaris. Can someone please shed light on what does it mean? I get a whole bunch of similar warnings from many other boost headers. -LJ

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Solution for (some) Compilation Problems with Sun Forte 6.2
by Adalbert Perbandt 16 Jun '03

16 Jun '03

Hi there, a colleague of mine tried to build the Boost::filesystem library (from Boost 1.30.0) under Sun SPARC Solaris7 with the Forte6.2 aka Sun Workshop5.3 compiler and got this failure: >> Assertion: (../links/init.cc, line 972) while processing /opt/boost_1.30.0/boost/type_traits/alignment_of.hpp at line 45. He investigated this problem and found out that defining the preprocessor macro BOOST_NO_INCLASS_MEMBER_INITIALIZATION would solve this. So we changed the boost/config/compiler/sunpro_cc.hpp at line 33 as follows: # if (__SUNPRO_CC <= 0x530) || !defined(BOOST_STRICT_CONFIG) # define BOOST_NO_INCLASS_MEMBER_INITIALIZATION Now we can compile the filesystem library successfully. Could please one of the experts comment on this change or maybe include this in the next release? Regards, Adalbert Perbandt.

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Newbee: Build/Installation Questions
by Adalbert Perbandt 16 Jun '03

16 Jun '03

Hi there, I'm still uncertain how to properly build and install boost libraries under Solaris 7. I unpacked the boost_1_30_0.tar.gz file and ran from the boost_1_30_0/libs/test/build directory: $ jam -sTOOLS=sunpro -sBUILD="debug release" \ -sALL_LOCATE_TARGET=/opt/boost_1.30.0 This created some of the lib files below /opt/boost_1.30.0/libs/test/build/bin/... Not all of them because in release mode compiling the file boost_1_30_0/libs/test/src/unit_test_log.cpp failed several times: [...] sunpro-C++-action /opt/boost_1.30.0/libs/test/build/bin/libboost_test_exec_monitor.a/sunpro/release/runtime-link-dynamic/unit_test_log.o Assertion failure in prep_dot >> Assertion: (../links/prepexpression.cc, line 560) while processing ../src/unit_test_log.cpp at line 301. CC -c -DNDEBUG -fast -O4 -xtarget=generic -features=rtti -features=except -I"/opt/boost_1.30.0/libs/test/build" -I"/home/hwadm/Boost/boost_1_30_0" -o "/opt/boost_1.30.0/libs/test/build/bin/libboost_test_exec_monitor.a/sunpro/release/runtime-link-dynamic/unit_test_log.o" "../src/unit_test_log.cpp" ...failed sunpro-C++-action /opt/boost_1.30.0/libs/test/build/bin/libboost_test_exec_monitor.a/sunpro/release/runtime-link-dynamic/unit_test_log.o... [...] Line 301 and around in this file look so: //____________________________________________________________________________// unit_test_log& unit_test_log::operator<<( checkpoint const& cp ) { if( m_pimpl->m_entry_in_progress ) m_pimpl->set_checkpoint( cp ); // LINE 301 return *this; } //____________________________________________________________________________// I cannot see any complexity here that could lead to an assertion. As I learned from the Boost Users Mailinglist archive such assertions seem to be common problems with Sun's forte 6.2 and 7 compilers. O.k. When the build above was finished I got at least the libs. built in debug mode obvisously completely installed below /opt/boost_1.30.0/libs/test/build/bin/<libs>/sunpro/... To get the header files installed I ran $ bjam -sTOOLS=sunpro -sBUILD=install But this command did not install the header files which would be required to use the test library. Instead a complex directory structure was created below ../sunpro/install. Is there no way to automatically get all the header files that belong to the test lib plus the other boost header files used by this lib installed automatically? Many thanks in advance for any hint. Regards, Adalbert Perbandt.

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Forward lookahead - abysmal failure
by noamxnoam 15 Jun '03

15 Jun '03

Hello all, Tried to use the forward lookahead asserts, both positive and negative and could not make a match. Is there some sample code anywhere or a tip to explain where I went wrong? Thanks, Noam

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