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Preprocessor to generate enum
by Hansi 02 Feb '09

02 Feb '09

Hi, what is the best way to generate the following enum with the preprocessor library (boost 1.34.1)? enum { R1=0, R2=1, ... }; Best regards Hansjörg

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Re: [Boost-users] Compiler Error With boost::bind and boost::signals
by KERSAM 02 Feb '09

02 Feb '09

I forgot: I am using the Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14.00.50727.762 for 80x86 and Boost Version 1.35. KERSAM wrote: > > Hello. > > I have a compiler error when I try to use boost::bind and boost::signals. > Here is the code: > > -------------------- > #include<boost/bind.hpp> > #include<boost/signals.hpp> > > class MyBoostTest { > public: > void testFunction(int x, int y) {} > }; > > > void doConnect() { > boost::signal2<void, int, int> signal; > signal.connect(boost::bind<void>(&MyBoostTest::testFunction, new > MyBoostTest, _1)); > } > ----------------------------------- > > The compiler gives me the following error: > c:\3rdparty\boost\boost\bind.hpp(289) : error C2064: term does not > evaluate to a function taking 2 arguments > class does not define an 'operator()' or a user defined conversion > operator to a pointer-to-function or reference-to-function that takes > appropriate number of arguments > > What am I doing wrong? > > Regards > -- View this message in context: http://www.nabble.com/Compiler-Error-With-boost%3A%3Abind-and-boost%3A%3Asi… Sent from the Boost - Users mailing list archive at Nabble.com.

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std::wstring issue with Boost::FileSystem
by Sean Farrow 02 Feb '09

02 Feb '09

Hi: Whilst using boost::filesystem I'm getting the following issue: I've defines: std::wstring Process =ProcessToFind; //ProcessToFind is an input to the function I'm writing. std::wstring test =boost::filesystem::wpath(szModName).filename(); //szModName is obtained from a win32 api function. Process.Compare(test); //This line gives the following Error: 1>c:\work\access for everyone\dragonspeak\dragonspeak.cpp(45) : error C2039: 'Compare' : is not a member of 'std::basic_string<_Elem,_Traits,_Ax>' 1> with 1> [ 1> _Elem=wchar_t, 1> _Traits=std::char_traits<wchar_t>, 1> _Ax=std::allocator<wchar_t> 1> ] I'm using the trunk as of yesterday (feb 1) and visual studio 2005. Anyone any ideas what's going wrong, or what I've forgotten? Cheers Sean.

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[Bind] Representing a member function as C function pointer?
by Roland Bock 02 Feb '09

02 Feb '09

Hi, maybe this is stupid, but I wonder if my code could become more elegant. I am using expat for XML parsing, which is working fine, but could be nicer: I have a class (XmlParser) which provides all the handlers for SAX parsing required by expat, but I can't figure out how to use them directly? When initializing expat, I give it a pointer to an XmlParser object and then register handlers: -------------------------- static void expatStartElementHandler (void* pUserData, const char* element, const char** attr) { XmlParser* xmlParser = reinterpret_cast<XmlParser*>(pUserData); xmlParser->startElement (element, attr); } static void expatEndElementHandler (void* pUserData, const char* element) { XmlParser* xmlParser = reinterpret_cast<XmlParser*>(pUserData); xmlParser->endElement (element); } void XmlParser::init() { parser_ = XML_ParserCreate ("UTF-8"); XML_SetUserData (parser_, this); XML_SetElementHandler (parser_, expatStartElementHandler, expatEndElementHandler); //... } ------------------------- I would prefer to get rid of those static non-member functions and their reinterpret_cast and do something like // does not work XML_SetElementHandler (parser_, boost::bind(&XmlParser::startElement, this, _2, _3), boost::bind(&XmlParser::endElement, this, _2)); Is there a nice way to do this with bind? Regards, Roland

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passing a boost.array to a c function, and boost.System
by Sean Farrow 02 Feb '09

02 Feb '09

Hi list: I have a c function EnumProcesses in windows, and waswondering: 1. How can I pass a boost.array to this function, I need to pass the undedrlying array, not the boost.array class. 2. Does boost.system suppor the retrieval of operating system process in an stl-complient way, i.e using stl containers and allowing boost.Foreach to iterate over them. Cheers Sean.

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linking query
by Sean Farrow 01 Feb '09

01 Feb '09

Hi: I've now got boost libraries compiled. The only other query I have is I have my visual studio project set up to use multi-threaded debug dll but when I build with boost filesystem it links the code in by default. How can I tell boost to use the dll version for debug and lib (static) for release? Sean.

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[Smart Ptr] intrusive_ptr_add_ref(T * & p)
by Alexader 01 Feb '09

01 Feb '09

Looks like it is possible to define intrusive_ptr_add_ref as void intrusive_ptr_add_ref(T * & p) not as void intrusive_ptr_add_ref(T * p) Then, it is possilbe either to increase reference count as usually or to clone the object if it is in non-shareable state. Would this work ? Is it know use case, maintained by Smart Pointers library ?

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error linking the boost.filesystem library
by Sean Farrow 01 Feb '09

01 Feb '09

Hi: When trying to build a probram with the boost.filesystem library, I get an lnk1104 using visual studio 8 (2005). The boost include and lib paths c:\program files\boost and c:\program files\boost\bin.v2 are in the default vc include and library paths respectively, the archive bit is set--this shouldn't make a difference as far as I know! Any one know why this error is ocuring? Cheers Sean.

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[Fusion] Sequence adapter
by Joel Falcou 01 Feb '09

01 Feb '09

Fusion provides supprot for thing like boost::tuple or boost::array to be treated as fusion sequence in runtime algorithm. Is there any meta-function that gives me the compile-time conversion or should I build them myself ? eg as_vector< array<int,6> >::type == vector<int,int,int,int,int,int> Thanks in advance -- ___________________________________________ Joel Falcou - Assistant Professor PARALL Team - LRI - Universite Paris Sud XI Tel : (+33)1 69 15 66 35

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Calling a function in a defined time intervall
by Olivier Tournaire 01 Feb '09

01 Feb '09

Hi all, I would like to know how can I call a member function each x miliseconds, during a given time. Can any boost library help me for this task ? Regards, Olivier -- Olivier Tournaire MATIS - Institut Géographique National 73, Ave de Paris 94165 St Mandé cedex, France tel: (+33) 1 43 98 80 00 - 71 25 fax: (+33) 1 43 98 85 81

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