September 2006 - Boost-users - lists.preview.boost.org

Re: [Boost-users] [string_algo] wildcard support?
by james.jones＠firstinvestors.com 08 Sep '06

08 Sep '06

From: "Richard Dingwall" <rdingwall(a)gmail.com> > Cheers. I was rather hoping not to have to use regular expressions; > they're kinda beyond the intended users of my program (it's for a > user-defined filter function, and I don't expect them to be familiar > with regex syntax). > > I cheaped out and used an old C wildcmp(wild.c_str(), text.c_str()) > method instead. Just because YOU use regex internally doesn't mean to have to expose full regex capabilities to the … [View More]

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[serialization] different behaviour between xml_wiarchive and binary_wiarchive
by Oliver Mutz 08 Sep '06

08 Sep '06

In my application I'm trying to serialize data alternatively to xml_wiarchive or binary_wiarchive. Writing and reading XML works without any problems. Binary writing seems to work too, but reading the file throws an exception with exception_code 'unregistered_class'. What I do is reading the XML data, writing binary and reading binary back in. I thought there should be no difference which kind of archive I use. Am I missing a point? I would be thankful for any hint. I know that it is … [View More]

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How to use bind/lambda in a conditional for_each?
by Baranowski, Daniel 08 Sep '06

08 Sep '06

Hey all! I've really enjoyed using boost::bind for calling member functions and such. I wish I had found this earlier! Anyhow, I'm trying to write for_each statement that only passes the object to a function if certain conditions are met. Unfortunately, I'm not well versed enough in boost::bind (and I've never used the lambda library) so I'm not sure how to do this! Can someone lend me a hand? I couldn't find anything in the mail archives. If I were writing a regular for-loop, this is how it … [View More]would look: vector<MyObjClass> myVector; myVector.push_back(MyObjClass(2)); myVector.push_back(MyObjClass(3)); myVector.push_back(MyObjClass(3)); myVector.push_back(MyObjClass(5)); myVector.push_back(MyObjClass(6)); vector<MyObjClass>::iterator end = myVector.end(); vector<MyObjClass>::iterator itr; for(itr = myVector.begin(); itr != end; ++itr) { if((*itr).GetValue() == 3) ProcessingFunction(*itr); } And here's the for_each that just passes every object into the processing function: // From inside a function in a class called ThisClass vector<MyObjClass> myVector; myVector.push_back(MyObjClass(2)); myVector.push_back(MyObjClass(3)); myVector.push_back(MyObjClass(3)); myVector.push_back(MyObjClass(5)); myVector.push_back(MyObjClass(6)); vector<MyObjClass>::iterator begin = myVector.begin(); vector<MyObjClass>::iterator end = myVector.end(); for_each(begin, end, boost::bind(&ThisClass::ProcessingFunction, this, _1)); So I guess the question is, how do I add the condition into the for_each? I know there's got to be a way! Thanks for any help! Daniel ********************************************************************************************** Disclaimer - This email and any files transmitted with it are proprietary and may contain privileged or copyright information. You must not present this message to another party without gaining permission from the sender. If you are not the intended recipient you must not copy, distribute or use this email or the information contained in it for any purpose other than to notify us. If you have received this message in error, please notify the sender immediately, and delete this email from your system. We do not guarantee that this material is free from viruses or any other defects although due care has been taken to minimize the risk. eSafe scanned this email for viruses, vandals and malicious contentAny views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of LSI. ********************************************************************************************** [View Less]

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[Signals] Relationships to other libraries and terms
by Scott Meyers 08 Sep '06

08 Sep '06

I've been trying to make sense of Boost.Signals, especially in terms of some other libraries I'm familiar with. Part of the problem is terminology, I think, e.g., callbacks, slots, and delegates (as in .NET, but also as used by some for bound member function pointers (e.g.,http://www.codeproject.com/cpp/FastDelegate.asp)) I'm hoping people will take a look at what follows, correct any errors they see, and maybe lend additional insight so that my understanding will be improved. We start with "… [View More]

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[asio] tcp::socket state query?
by Rod Morison 08 Sep '06

08 Sep '06

Is there way to query the local status of a socket in asio? Or, is there another technique for state & error management? For example, something lick the TcpSocket state in Qt v4. I.e., AbstractSocket::UnconnectedState 0 The socket is not connected. QAbstractSocket::HostLookupState 1 The socket is performing a host name lookup. QAbstractSocket::ConnectingState 2 The socket has started establishing a connection. QAbstractSocket::ConnectedState 3 A connection is … [View More]

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[iostreams] Building with vacpp toolset
by Patrik Jonsson 07 Sep '06

07 Sep '06

Hi I'm trying to build boost with the vacpp (IBM Visual Age C++) compilers, but the iostreams library won't build. It appears to be missing include files zlib.h and bzlib.h: xlC -c -I/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1 -qNOOPTimize -qnoinline -g -qfullpath -qnotempinc -qfuncsect -qeh -qrtti -I"bin/boost/libs/iostreams/build" -I"/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1" -I"/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1" -o "bin/boost/libs/iostreams/… [View More]

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[wave] Building with vacpp toolset
by Patrik Jonsson 07 Sep '06

07 Sep '06

Hi I'm trying to build boost with the vacpp (IBM Visual Age C++) compilers, but the wave library won't build: xlc-C++-action bin/boost/libs/wave/build/libboost_wave.a/vacpp/debug/instantiate_cpp_grammar.o "/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1/boost/wave/cpplexer/cpp_lex_iterator.hpp", line 53.13: 1540-0038 (S) The name "typename TokenT::position_type" is not a type. <see end of message for the rest of the error, for that file> This is with xlC 8.0.0.0 on an IBM SP5 … [View More]

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ptr_container compiles slow
by LionAM 07 Sep '06

07 Sep '06

Hello! I'm using Visual C++ 6 (for an MFC-Project). When I include <boost\ptr_container\ptr_vector.hpp> in an Sourcefile, it takes over 11 seconds to compile (without less than 1 second!) If I really wanted to use ptr_containers in my Project, I would have to include it in many files. But then compilation takes too long... Are there any possibilities to speed this up? Alex -- View this message in context: http://www.nabble.com/ptr_container-compiles-slow-tf2225929.html#a6168364 Sent … [View More]

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[serialization] Newbie question on serializing a derived class
by David Pettigrew 07 Sep '06

07 Sep '06

I have a class that is derived from a GUI framework class and it seems like the serialization library will attempt to serialize the parent class but I don't own that classes code. I get an error "'GUIWidget::GUIWidget' : cannot access private member declared in class 'GUIWidget'". I do not know why it is looking in the parent class since I do not do anything with the base_object. Is there a way to get around this issue? I am doing somethine wrong? Here is the code, #include <boost/archive/… [View More]

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Why am I not hearing that my edge has already been added?
by Eric Fowler 07 Sep '06

07 Sep '06

I am writing a simple graph app. The edges have an unsigned integer property that is incremented every time I "add" an edge from one given node to another, thus, any given edge has an "instance" of at least one, but if there are, say, three edges from node A to node B, edge A->B has nInstances == 3. To do this I would like to attempt to add an edge between nodes, and if the edge has already been added, just bump the counter for that edge, otherwise, set the counter to 1. My basic approach … [View More]

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