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

Re: [Boost-users] offtopic: std C++ / STL / boost-friendly UI framework?
by Lang Stefan 19 Sep '08

19 Sep '08

Umm, just out of interest, what *is* Wascana supposed to be? The site just calls it "Desktop Developer" and while it does mention Eclipse I'm not at all clear how it's related. I've jumped around the site but wasn't able to locate any explanation of what it really is. It does mention that it 'incorporates' (among other things) wxWidget and intends to 'incorporate' boost, but what is 'incorporate' supposed to mean? JRE is listed as well (but also gdb), so again I'm wondering what is this thing? As an aside, last I looked Eclipse was Java only, so why would Wascana be of help for C++ development when it's aimed at Eclipse (or so I understand it for now) Sorry if I'm being dumb, the issue interests me for private purposes and I've got to admit I'm a bit out of touch with UI development tools atm. Stefan -----Ursprüngliche Nachricht----- Message: 6 Date: Thu, 18 Sep 2008 14:46:26 -0500 From: "Jim Bell" <Jim(a)JC-Bell.com> Subject: Re: [Boost-users] offtopic: std C++ / STL / boost-friendly UI framework? To: <boost-users(a)lists.boost.org> Message-ID: <011201c919c7$3d452de0$b7cf89a0$@com> Content-Type: text/plain; charset="us-ascii" >> This is a bit of an offtopic question, but I wonder if there are any / if >> there will be any standard C++ / STL / boost friendly UI frameworks? > > However wxWidgets version 3 may be. They are considering > incorporating stl / boost among other things. Keep your eye on Wascana: wxWidgets with a WYSIWYG screen builder, built on Eclipse. http://wascana.sourceforge.net/ Eclipse is great, though I haven't used wxWidgets or Wascana. -Jim

2 1

[test] How to ignore a signal?
by Boris 19 Sep '08

19 Sep '08

I've a test case which receives the SIGCHLD signal on Solaris. Boost.Test catches it and prints an error message although in that test case SIGCHLD s perfectly fine. How do I make Boost.Test ignore this signal? I found BOOST_NO_SIGNAL_HANDLING back in Boost.Test 1.33.1 but it doesn't seem to exist anymore in 1.36.0? Boris

3 4

[test] memory access violation by calling <<-operator
by M. Siebeneicher 18 Sep '08

18 Sep '08

Hi boost-users, I created a class and overload the <<-operator. Now I tried to test them by assigning an instance of the class to an ostringstream, but I get always the error: "fatal error in "EmptyVertex_output_stream": memory access violation occurred at address 0xcccccce0, while attempting to read inaccessible data" It's very curious, because assigning a string directly to the ostringstream, no error occurs. I'm using boost 1.35.0 and VS2003 The code: // test_class.cpp BOOST_AUTO_TEST_CASE( EmptyVertex_output_stream) { // 1 // const string vertexNameIn1 = "test name"; const EmptyVertex emptyVertex1(vertexNameIn1); ostringstream currString1; currString1 << emptyVertex1; // Error occurs here, see class_to_test.cpp string expString1 = "EmptyVertex(name=test name)"; BOOST_CHECK_EQUAL(currString1.str(), expString1); } //class_to_test.cpp /*public friend*/ ostream& operator<<(ostream& streamOut, const EmptyVertex& vertex) { streamOut << "EmptyVertex("; // Error occurs here streamOut << vertex.getName(); streamOut << ")"; return streamOut; } Can someone give me a clue? greetz, modbom -- Ist Ihr Browser Vista-kompatibel? Jetzt die neuesten Browser-Versionen downloaden: http://www.gmx.net/de/go/browser

2 1

Re: [Boost-users] offtopic: std C++ / STL / boost-friendly UI framework?
by Jim Bell 18 Sep '08

18 Sep '08

>> This is a bit of an offtopic question, but I wonder if there are any / if >> there will be any standard C++ / STL / boost friendly UI frameworks? > > However wxWidgets version 3 may be. They are considering > incorporating stl / boost among other things. Keep your eye on Wascana: wxWidgets with a WYSIWYG screen builder, built on Eclipse. http://wascana.sourceforge.net/ Eclipse is great, though I haven't used wxWidgets or Wascana. -Jim

1 0

[interprocess]files locations for mutex and named shm
by Eugen Stoianovici 18 Sep '08

18 Sep '08

the default location for named mutexes and named shared memory is %ROOT%\Documents and Settings\%USER%\Local Settings\Temp\boost_interprocess\... How can i change it? Thanks

2 6

[boost-users][logging] limiting/truncation the output file
by Igor R 18 Sep '08

18 Sep '08

Hello, I know the above library is not a part of the boost yet, but probably some of you had an experience with it. I log to a text file. What I need is to ensure that the file doesn't exceed some maximal size. For the sake of simplicity, I'd like just to re-create the file when it grows to much. I guess I may not just delete it externally, as it's managed by the logger. So how can I tell the logger to delete the file? (Ideally, I'd like to "scroll" the data in the file like in a queue - first in first out, but I guess it's impossible, isn't it?) Thank you, Igor'.

1 0

Re: [Boost-users] static reflection
by James Pritts 18 Sep '08

18 Sep '08

Sorry for top posting here, but I didn't receive Steven's response. I'm using i686-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1 (Apple Inc. build 5488). The compile error I get is the following: g++ -I/Users/jpritts/trunk/LIFEBLAST_HOME/i386-darwin-gcc-4_0/vendor/Boost/include main.cc -o a.out main.cc: In instantiation of 'DoesVisitorImplement<Derived, void, float>': main.cc:47: instantiated from here main.cc:22: error: '&Base::operator()' is not a valid template argument for type 'void (Derived::*)(float)' because it is of type 'void (Base::*)(float)' main.cc:22: note: standard conversions are not allowed in this context Thanks, Jimmy. AMDG James Pritts wrote: > On a boost thread a while ago, I saw some code to query for the > existence of a member function of a class using SFINAE and > BOOST_STATIC. I guess you could call it static reflection. Below is > a code snippet that does not work using the aforementioned methods. > The culprit is the using Base::operator() statement in the Derived > class. Apparently the base class method void operator()(float u) is > not part of the type of Derived. This was a shock to me, because you > can call the overloaded method from the derived class. I'd appreciate > any advice on how to check for the existence of member functions in > this scenario. I fear it may be impossible. Thanks! > You can convert a member function pointer of a derived class to a member function pointer of a derived class, so it ought to work. What compiler are you using? I get 1 1 Using msvc 9.0. In Christ, Steven Watanabe

4 4

Which version?
by Robert Jones 18 Sep '08

18 Sep '08

I've found a boost distribution in the build at work. How can I determine which release it is? - Rob.

3 3

is it safe to upgrade from 1.35 to 1.36?
by frederic.bron＠alcan.com 18 Sep '08

18 Sep '08

Since 1.36 is out, I have seen so many messages concerning troubles with 1.36 that I did not dare to upgrade. What is the status of 1.36? Regards F. Bron Avis : Ce message et toute pièce jointe sont la propriété d'Alcan et sont destinés seulement aux personnes ou à l'entité à qui le message est adressé. Si vous avez reçu ce message par erreur, veuillez le détruire et en aviser l'expéditeur par courriel. Si vous n'êtes pas le destinataire du message, vous n'êtes pas autorisé à utiliser, à copier ou à divulguer le contenu du message ou ses pièces jointes en tout ou en partie. Notice: This message and any attachments are the property of Alcan and are intended solely for the named recipients or entity to whom this message is addressed. If you have received this message in error please inform the sender via e-mail and destroy the message. If you are not the intended recipient you are not allowed to use, copy or disclose the contents or attachments in whole or in part.

1 0

[program_options] Problem using value<string>()->zero_tokens() with config file
by Marcio Paim de Aquino 18 Sep '08

18 Sep '08

Hi, I have the following code section: po::options_description config; config.add_options() ( "HOST", po::value<string>(&host) ) ( "USER", po::value<string>(&user) ) ( "PASSWD", po::value<string>(&passwd) ) ( "DATABASE", po::value<string>(&database) ) ( "PORT", po::value<int>(&port) ) ( "VERTEX.WEIGHT", po::value<string>()->zero_tokens() ); po::variables_map vm; ifstream ifs( "myfile.conf" ); store( parse_config_file( ifs, config ), vm ); notify( vm ); If in myfile.conf I leave WEIGHT blank like this [VERTEX] WEIGHT = I get the following error message: terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::program_options::invalid_syntax> >' what(): no value given in 'WEIGHT =' Aborted Someone can tell whats is wrong? Thanks Marcio

1 0