March 2008 - Boost-users - lists.preview.boost.org

Help linking to Boost in Xcode 3 debug
by Jeremy Conlin 27 Mar '08

27 Mar '08

I am using Boost program_options library. I can successfully compile my code under "Release" mode in Xcode, but under "Debug" mode there are some issues with linking. The compiler says it can't find vtables for some of the program_options stuff (see error messages pasted below). I have tried to compile my code and Boost with the same architecture (i386 only) and telling the linker to find the debug library with the linker flag OTHER_LDFLAGS = -lboost_program_options-d-1_34_1 Can someone … [View More]

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Serializing Boost.Tuple
by Sohail Somani 27 Mar '08

27 Mar '08

Hi, Just thought I would share some code that serializes Boost.Tuple using Boost.Serialization: #include <boost/tuple/tuple.hpp> #include <boost/serialization/nvp.hpp> #include <boost/preprocessor/repetition.hpp> namespace boost { namespace serialization { #define GENERATE_ELEMENT_SERIALIZE(z,which,unused) \ ar & boost::serialization::make_nvp("element",t.get< which >()); #define GENERATE_TUPLE_SERIALIZE(z,nargs,unused) \ template… [View More]

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object relational mapping library
by Pavlo Korzhyk 27 Mar '08

27 Mar '08

Dear List, I use Boost.Serialization in my projects. It's very useful, powerful, and cool. But it doesn't meet some of my data persistence needs. Thus, I present the C++ library for transparent object-relational mapping to SQLite3. It works similar to Java Hibernate, and its API is inspired by Boost.Serialization. http://code.google.com/p/hiberlite/ I hope some of you will find this work useful. Comments on design, usability, proposals, and contributions will be highly appreciated! Yours … [View More]

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boost::python PyUnicodeUCS4_FromEncodedObject
by Venkatraman S 27 Mar '08

27 Mar '08

Hi, Am stumbling on a very rudimentary problem and am totally not able to proceed. Googling did not help me much and hence am trying to state the problem in its entirety. Any quick comments/hints would be highly helpful. Am getting the following error when i try to import the module (class) into python : $python >>> import myClass *Traceback (most recent call last): File "<stdin>", line 1, in ? ImportError: ./myClass.so: undefined symbol: PyUnicodeUCS4_FromEncodedObject * *… [View More]

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boost threads and Qt
by Rainer Thaden 27 Mar '08

27 Mar '08

Hi all, I have a general question regarding threads and signals with boost and Qt. I have a DLL communicating with an external device via Ethernet and a main program with a Qt-GUI for controlling the device. The communciation runs in a different thread than the main program. Qt provides signal/slots across threads, but as I understand it, I have to use the QThread library for it to work. In the DLL I use boost signals and slots and the main program also receives boost signals and then … [View More]

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Boost signals link error
by Michael Dugan 27 Mar '08

27 Mar '08

Hi I am using boost(1.34.1) signals on linux(centos5) with gcc 4.1.2. I can link to the static boost_signals-gcc41-mt library, however the following symbols seem to be missing. They all seem to be related to boost::signals::named_slot_map_iterator. Other symbols such as boost::signals::connection::~connection() are found. ../../../bin/x86_64/32/linux/g++4.1.2/release/libIceExchangeCommon.so: undefined reference to `boost::signals::detail::named_slot_map_iterator::named_slot_map_iterato r(… [View More]boost::signals::detail::named_slot_map_iterator const&)' ../../../bin/x86_64/32/linux/g++4.1.2/release/libIceExchangeCommon.so: undefined reference to `boost::signals::detail::named_slot_map_iterator::operator=(boost::signa ls::detail::named_slot_map_iterator const&)' ../../../bin/x86_64/32/linux/g++4.1.2/release/libIceExchangeCommon.so: undefined reference to `boost::signals::detail::named_slot_map_iterator::dereference() const' ../../../bin/x86_64/32/linux/g++4.1.2/release/libIceExchangeCommon.so: undefined reference to `boost::signals::detail::named_slot_map_iterator::increment()' ../../../bin/x86_64/32/linux/g++4.1.2/release/libIceExchangeCommon.so: undefined reference to `boost::signals::detail::named_slot_map_iterator::equal(boost::signals:: detail::named_slot_map_iterator const&) const' collect2: ld returned 1 exit status Has anyone seen this before? Thanks in advance. Michael Schneider Trading 4th Floor, 25 Copthall Avenue London EC2R 7BP -------------------------------------------------------- Message from: Michael.Dugan(a)schneidertrading.com Message to: boost-users(a)lists.boost.org Attached files: 0 This e-mail and any files transmitted with it are confidential, may be legally privileged, and are for the sole use of the intended recipient. Copyright in this e-mail and any accompanying document created by us is owned by us. If you are not the intended recipient of this e-mail or any part of it please telephone our IT Department at the number shown above or by e-mail at info(a)schneidertrading.com. You should not use or disclose to any other person the contents of this e-mail or its attachments (if any), nor take copies. This e-mail is not a representation or warranty and is not intended nor should it be taken to create any legal relations, contractual or otherwise. Schneider Trading Associates Ltd (Registration No. 3692131) is incorporated in England and Wales and the registered office is at 25 Copthall Avenue, London EC2R 7BP. The company is authorised and regulated by the Financial Services Authority [View Less]

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Re: [Boost-users] Ugly warnings from BOOST_STATIC_ASSERT
by Jean-Francois Bastien 27 Mar '08

27 Mar '08

> We have this really neat and simple macro in our project: > #define compile_assert(x) typedef bool > COMPILE_ASSERT[(x) ? 1 : -1] > > Although it does what we need and serves us well, I > tried to replace > it with BOOST_STATIC_ASSERT. Unfortunately this resulted > in a lot of > ugly warnings throughout the compile: > warning: use of old-style cast > There's the following comment in the static assert header: // Note that the argument to the assert … [View More]

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Pointer types that let me specify destructor functions.
by Jason Cipriani 27 Mar '08

27 Mar '08

The boost shared_ptr lets me specify my own destructor function, but shared_ptr does more than I want -- I do not need thread-safety or reference counting, and would like to avoid the associated overhead. What I really want is an std::auto_ptr that lets me specify a destructor function. Does boost have something light-weight like this? Right now I implement my own, sort of like this (with extra conversion stuff): template <class T> class auto_ptr_ex { public: typedef void (* D) (T *… [View More]

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GSoC Projects
by Derrick Hathaway 27 Mar '08

27 Mar '08

Hello, I wonder if some of you who may have had experience with Google's Summer of Code program could give me a little direction. I have an idea which projects I will be applying for. But I had a few questions. First of all, do I need to find a mentor who has already been accepted into the program before I apply? Or, is that part of the deciding factor for being accepted (wether or not there is a mentor for the proposed project)? There are a couple of projects listed in the Boost Wiki [http://… [View More]

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[Proto] Reminder: review will end March 28th
by Hartmut Kaiser 27 Mar '08

27 Mar '08

Hi all, this is just a gentle reminder for all intending to write a Proto review to finish it really soon. At the same time this should be understood as an encouragement for all of you still hesitating to write one because you perhaps think the library is too complicated or too exotic and you probably won't be able to write an adequate review. Please do not hesitate! Even a short review based on your experience or based on what you've read in the documentations is highly appreciated. … [View More]

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