May 2005 - Boost-users - lists.preview.boost.org

Boost question about static method of a class
by kauai 18 May '05

18 May '05

Hi all, Just wondering if I can do this with Boost: I have a number of classes that all have the same static method with the same arguments. I want to register these classes somewhere/somehow so that later on I can do something like: aClassName::StaticMethod(pData, len); // for example At runtime aClassName whould be the actual class, for example would resolve to: BobsClass::StaticMethod(pData, len); In Java I think I would use the class "Class" to do something like this, but dont know how in C++. Thanks for any help, -K __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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RE: [Boost-users] [spirit] parse(iter,iter,rule)
by Hartmut Kaiser 17 May '05

17 May '05

Sorry... > Thorsten Ottosen wrote: > > > Shouldn't it be possible to parse with the following syntax: > > > > std::string text( "fooooo"); > > static rule<> r = *space_p >> '"' >> > > (*alnum_p)[assign_a(name)] >> '"'; > > parse_info<std::string::const_iterator> info = > > boost::spirit::parse( text.begin(), text.end(), r ); > > > > How do I otherwise interpret > > > > http://www.boost.org/libs/spirit/doc/scanner.html > > > > ? > > It should be: > > std::string text( "fooooo"); > static rule<std::string::iterator> r = > *space_p >> '"' >> (*alnum_p)[assign_a(name)] >> '"'; > parse_info<std::string::const_iterator> info = It should be: parse_info<std::string::iterator> info = > boost::spirit::parse( text.begin(), text.end(), r ); Regards Hartmut

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a generic factory for boost
by martin f krafft 17 May '05

17 May '05

I cannot find a generic factory implementation in boost. I have implemented my own, lightweight and header-only factory class: libfactory++ [http://freshmeat.net/projects/libfactory] which I would like to make available to boost. It takes a somewhat curious approach to custom constructors (using the Command pattern), and it still has a TODO list that's non-empty, but I would be happy to submit this work to boost. Question is: is there interest for this? View the tree online: http://xrl.us/f4r5 [0] 0. http://arch.madduck.net/cgi-bin/archzoom.cgi/madduck@arch.madduck.net--2005… -- martin; (greetings from the heart of the sun.) \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@madduck invalid/expired pgp subkeys? use subkeys.pgp.net as keyserver! spamtraps: madduck.bogus(a)madduck.net your eyes are weary from staring at the CRT. you feel sleepy. notice how restful it is to watch the cursor blink. close your eyes. the opinions stated above are yours. you cannot imagine why you ever felt otherwise.

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Run-time problem with VC6, stlport and boost (1.32) regex
by Mats Lidell 17 May '05

17 May '05

Hi, I'm getting this runtime error in my program. c:\stlport-4.6.2\stlport\stl\debug\_iterator.h(179): STL assertion failure : __check_same_owner(__x, __y) The code that causes this is like this (Actual code slightly modified). It is the access of the match that triggers the error above. boost::smatch m; if (regex_match(s, m, reg)) { (here)--> s_info.version = m[1]; } I'm using stlport 4.6.2 with boost-1.32 on W2K and VC6 SP6. stlport is built with default options and boost is built like this: boost-jam-3.1.10-1-ntx86/bjam.exe -sTOOLS=msvc-stlport -sSTLPORT_PATH="c:" -sSTLPORT_VERSION=4.6.2 -sBUILD="debug release <runtime-link>static <threading>multi <stlport-iostream>on" install Any idea what can be wrong? Surely a simple access of the resulting match shouldn't cause this type of assertion to fire (or is there some subtle bug in my program that I'm missing!?) Please note that the program works OK using boost without stlport. Yours -- %% Mats

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fatal error C1204 on MS .Net with boost serialize
by Olivier Vanden Bos 17 May '05

17 May '05

I ve got a lot of this, i m forced to split all declarations of classes in separate .cpp file. In fact, Boost::serialize become unusable... Does somebody have a solution ? - VDB - "LNK2019: unresolved external symbol" Olivier Vanden Bos MSN#TheVdeub(a)hotmail.com AI Programmer UBISOFT Montreal

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boost.serialization crash
by Eyal Susser 17 May '05

17 May '05

Hi, I was using the boost.serialization library to my great satisfaction on an intel machine running Linux. I then ported the code to a MIPS machine. I compiled boost using bjam with a mips compiler that isn't included in the available toolsets. Everything works well _until_ I try destroying the binary archives I use. When the destructor is called, I get a segmentation fault. My guess is that the serialization library relies on something else which wasn't compiled properly. But what? I built boost as follows: bjam -sTOOLS=gcc -sGXX=/usr/mips/bin/mips-linux-g++ --libdir=/usr/mips/lib/ --includedir=/usr/mips/include/ -sGCC_ROOT_DIRECTORY=/usr/mips install I have a lib directory and an include directory under /usr/mips. While building boost I got a whole bunch of errors, and not all the targets were successfully built, but I had no idea what to do, so I tried anyway... Thanks

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[spirit] parse(iter,iter,rule)
by Thorsten Ottosen 16 May '05

16 May '05

Hi Shouldn't it be possible to parse with the following syntax: std::string text( "fooooo"); static rule<> r = *space_p >> '"' >> (*alnum_p)[assign_a(name)] >> '"'; parse_info<std::string::const_iterator> info = boost::spirit::parse( text.begin(), text.end(), r ); How do I otherwise interpret http://www.boost.org/libs/spirit/doc/scanner.html ? Thanks -Thorsten -- Thorsten Ottosen ---------------------------- www.dezide.com http://www.cs.aau.dk/index2.php?content=Research/mi www.boost.org www.open-std.org/JTC1/SC22/WG21/

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[spirit] why don't parse( iter, iter, rule ) work?
by Thorsten Ottosen 16 May '05

16 May '05

-- Thorsten Ottosen ---------------------------- www.dezide.com http://www.cs.aau.dk/index2.php?content=Research/mi www.boost.org www.open-std.org/JTC1/SC22/WG21/

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[Signals] Observation about performance
by Keith MacDonald 16 May '05

16 May '05

I have an application that implements the Observer pattern, based on the GOF code and was interested in using Boost.Signals in a new application. Before committing myself, I decided to check the relative performance when signalling two observers. Both tests were performed on Windows XP, using MSVC 8 beta 2, with the /Ox optimisation. Here are the times for 6,000,000 signals, measured with the Win32 GetTickCount() API on a 3GHz P4 with 1GB RAM: GOF Observer: 109 Boost.Signals: 6203 Clearly, you have to trade convenience for performance with this library. - Keith MacDonald

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Declaring boost.serialization archivers as members
by Eyal Susser 16 May '05

16 May '05

Hi, After doing what I described in the subject, I found that when marshalling data between processes, the same data gets sent over and over again. It's as if the archiver has some internal copy of the stream, and keeps serializing that stream over and over. Anyone else have this problem, or is it some pitfall in my implementation? Thanks

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