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regex_replace not found
by Scott Field 15 Feb '04

15 Feb '04

I installed boost_1_31_0 on Red Hat Fedora Core 1 with no apparent errors. I can compile and run the examples in /usr/local/src/boost_1_31_0/libs/date_time/example and I have compiled and run some graph examples so I think it is installed OK. However when I compile /usr/local/src/boost_1_31_0/libs/regex/example/snippets/credit_card_example.cpp (or anything that uses regex_replace) I get the following error: [root@athlon snippets]# g++ credit_card_example.cpp credit_card_example.cpp: In function `std::string machine_readable_card_number(const std::string&)': credit_card_example.cpp:35: error: `regex_replace' undeclared in namespace ` boost' credit_card_example.cpp: In function `std::string human_readable_card_number(const std::string&)': credit_card_example.cpp:40: error: `regex_replace' undeclared in namespace ` boost' TIA Scott

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boost_1_31_0 VC7.1 Lib names incompatible with VS IDE???
by Jeff Flinn 14 Feb '04

14 Feb '04

Sorry if I'm missing something here but when I build boost with: bjam "-sTOOLS=VC7.1" "-sVC71_ROOT=C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7" I get libs and dll's generated with names like: libboost_signals-VC7.1-mt-gd-1_31.lib Entering the above into the VS-IDE Project-Properties Dialong - Linker-Input Additional-Dependencies Field and trying to Link yields: Linking... LINK : fatal error LNK1104: cannot open file 'libboost_signals-vc71-mt-gd-1_31.lib' Removing the '.' from VC7.1 in the IDE and renaming the file in like fashion allows the Link to succeed. Is there a way to generate the names in the first place without the offending '.'. Should the '7.1' be generated at all? The Toolset Abbreviation Table in getting_started.html list "vc" for both VC7 and VC7.1. Thanks, Jeff

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Iterator library docs
by Ded Panas 13 Feb '04

13 Feb '04

Subj looks fine, but which files to #include to use the library? dedpanas

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RE: [Boost-users] building boost on HP-UX
by Tom Matelich 13 Feb '04

13 Feb '04

I use boost on HP with g++. It works fairly well. I'm not sure what's going on with Toon. He took over the HP testing from Jens Maurer who was using an account Boost has been given into a server at HP. For a while, the aCC team was saying they were going to start using boost in their regression testing. I'm not sure why they haven't. I'd really like to see if they've improved at all, lately, but I don't have a recent version of aCC to use. > -----Original Message----- > From: Cheenu Srinivasan [mailto:cheenu_srinivasan@hotmail.com] > Sent: Friday, February 13, 2004 7:33 AM > To: boost-users(a)lists.boost.org > Subject: [Boost-users] building boost on HP-UX > > > I've been trying to locate information on how boost performs on HP-UX. > > The boost regression log runs with aCC are 7 months old: > http://boost.sourceforge.net/regression-logs > and the results (74% failure) are not encouraging. > > Has aCC been given up for dead by the boost community? Has anyone > tried other compilers? g++? comeau? Thanks. > > Cheenu > > _________________________________________________________________ > Check out the great features of the new MSN 9 Dial-up, with > the MSN Dial-up > Accelerator. http://click.atdmt.com/AVE/go/onm00200361ave/direct/01/ > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > ----------------------------------------------------------------------- DISCLAIMER: Information contained in this message and/or attachment(s) may contain confidential information of Zetec, Inc. If you have received this transmission in error, please notify the sender by return email. -----------------------------------------------------------------------

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building boost on HP-UX
by Cheenu Srinivasan 13 Feb '04

13 Feb '04

I've been trying to locate information on how boost performs on HP-UX. The boost regression log runs with aCC are 7 months old: http://boost.sourceforge.net/regression-logs and the results (74% failure) are not encouraging. Has aCC been given up for dead by the boost community? Has anyone tried other compilers? g++? comeau? Thanks. Cheenu _________________________________________________________________ Check out the great features of the new MSN 9 Dial-up, with the MSN Dial-up Accelerator. http://click.atdmt.com/AVE/go/onm00200361ave/direct/01/

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Bug in random library
by rupp＠stud.uni-frankfurt.de 13 Feb '04

13 Feb '04

I have either overlooked something basic or found a bug in the random library: boost::mt19937 engine_; double result_ = boost::uniform_real<double>(0., 1.) (engine_); std::cout << result_ << std::endl; assert ( (0. <= result_) && (result_ < 1.) ); results in 4.29093e+09 test_boost: test/test_boost.cpp:17: void test_random (): Assertion `(0. <= result_) && (result_ < 1.)' failed. Abort Although the documentation says "The current implementation is buggy, because it may not fill all of the mantissa with random bits." IMHO this is worse than that: I expected the result to satisfy min <= result < max. I'm using boost 1.31.0 and g++ 2.96 as well as g++ 3.3.2 (identical results) on Red Hat Linux. I hope that either someone can explain me my mistake or fix the bug. Matthias Rupp

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RNG, operator<< and VC7.1
by Witz 13 Feb '04

13 Feb '04

I'm trying to save the state of the random number generators to file but for some reason VC7.1 doesn't seem to be able to find operator<< (or operator>> when i need to read it back in). Anyone else had this problem? Is there a solution other than going in to the header file and creating a read and write function that contains the same code as the streaming operators? I.Whittley

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boost_1_31_0 transform_iterator and VC71 ICE - FYI
by Jeff Flinn 12 Feb '04

12 Feb '04

I've begun converting my projects to using the new iterator_adaptor's. I've encountered an ICE with the code below. I've tried to isolate it to a simple console app but of course, the problem does not occur there. The following distillation does ICE, when compiled with the /Gm (Enable Minimal Rebuild) flag, but compiles and runs fine w/out it. This is an MFC multithreaded lib project NOT using precompiled headers. I'll continue to try to isolate the conditions.Any thoughts on how to isolate the problem? VC7.1 error message: C:\boost\boost_1_31_0\boost\mpl\aux_\preprocessed\plain\apply.hpp(50) : fatal error C1001: INTERNAL COMPILER ERROR (compiler file 'msc1.cpp', line 2701) #include <string> #include <algorithm> #include <vector> #include <numeric> #include <boost/bind.hpp> #include <boost/function.hpp> #include <boost/iterator/transform_iterator.hpp> typedef std::pair<int,int> CSize; CSize SizeFromString( const std::string& aString ){ return CSize(1,2); } CSize XUnionStacked ( const CSize& aSz1, const CSize& aSz2 ){ return CSize(1,2); } CSize XSizeMultiLine( const std::string& aString, const CSize& aSize ) { CSize lSize(0,0); boost::function1<CSize,const std::string& > lSizeFromStringFnc = boost::bind( SizeFromString, _1 ); boost::function2<CSize,const CSize&,const CSize& > lSizeUnionStackedFnc = boost::bind( XUnionStacked, _1, _2 ); std::vector<std::string> lStrings(10); lSize = std::accumulate ( boost::make_transform_iterator( lStrings.begin(), lSizeFromStringFnc ) , boost::make_transform_iterator( lStrings. end(), lSizeFromStringFnc ) , lSize , lSizeUnionStackedFnc ); return lSize; } Thanks, Jeff F

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RE: [Boost-users] Threading problem
by Ben Hutchings 12 Feb '04

12 Feb '04

Damien McGivern <d_mcgivern(a)yahoo.com> wrote: > (First post) > Hi, > I've just started working with boost and have come > into some trouble with the thread class. I've included > the test code that I'm having the problem with in the > hope that someone could point out to me where I'm > going wrong. > > The code tests the QueueAccessor class > (CommandQueue.hpp) with the test code in > CommandQueueTest.hpp. I created a base class > (Runnable) to aid in creating a thread that runs an > object's method rather than a function. The code > compiles OK and seems to run OK too at first until I > realised that the main thread has somehow become one > of the threads that I created and is in a continuous > loop after the first join() is called > > _writer_thread1->join(); // line 21 join() waits for the thread to *end*. This should be done after the threads have been told to Stop(). > As you can probably guess from my code my background > is in Java so I'm not entirely sure if I'm using the > boost::thread correctly. I thought Java's join() was exactly the same. > I tested the QueueAccessor > using threads that use a static worker function > instead of an object's method and it seemed to run OK > so I'm assuming that the problem lies with the > Runnable base class. > > I'm using boost version 1.31.0 running Windows XP and > using VS.Net 2003 to compile/run the code. > > Any help will be very much appreciated Here are the bugs I found: - Runnable::_running is read and written from multiple threads without use of a mutex. - The result of QueueAccessor::Pop is undefined if the queue is empty. Perhaps it should throw in this case? - The return type of QueueAccessor::Size should be std::queue<QueueItem>::size_type (which I think is std::size_t). - QueueAccessor::Size doesn't lock the mutex for the queue. - Reader::Do busy-waits for input. It should wait on a condition variable instead. (Condition variables provide functions equivalent to the wait, notify and notifyAll methods that Object has in Java.) Worse, when the reader is asked to stop, Reader::Do may never return to Worker::Run and so the thread will never stop. - CommandQueueTest.hpp doesn't include <iostream>. - #include <name> is reserved for use with system headers. You should use #include "name" for including your own headers. - Identifiers that include "__" are reserved for the use of the implementation. You must not use them. - Many member variables are protected when they should be private. I have fixed most of the above and the program now works. Ben.

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boost_1_31_0 documentation - "Getting Started"
by Jeff Flinn 12 Feb '04

12 Feb '04

First the nit - The examples for running bjam include the arguments in double quotes as in: bjam "-sTOOLS=gcc" install Being bjam and generally makefile(and generally command line) impaired I tried: bjam "-sTOOLS=VC71" "-sVC71_ROOT=C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7" Which results in: VC71-tools.jam: No such file or directory C:\boost\boost_1_31_0\tools/build/v1\allyourbase.jam:630: in C++ rule C++-action unknown in module C:\boost\boost_1_31_0\tools/build/v1\allyourbase.jam:1097: in Object C:\boost\boost_1_31_0\tools/build/v1\allyourbase.jam:1162: in Objects C:\boost\boost_1_31_0\tools/build/v1\boost-base.jam:130: in dll-files C:\boost\boost_1_31_0\tools/build/v1\boost-base.jam:1934: in subvariant-target C:\boost\boost_1_31_0\tools/build/v1\boost-base.jam:2361: in stage Jamfile:144: in load-jamfiles C:\boost\boost_1_31_0\tools\build\v1\bootstrap.jam:15: in boost-build C:\boost\boost_1_31_0\boost-build.jam:16: in module scope Of course the following works great! bjam -sTOOLS=VC71 -sVC71_ROOT="C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7" So I'm not sure of the purpose of the "" in the documentation, but they are misleading, at least to me. The Praise - Awesome improvement in the completeness and organization of the built libs and dlls! Thanks, Jeff

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RE: [Boost-users] Threading problem
by Geert Pante 12 Feb '04

12 Feb '04

There's nothing wrong with your runnable class, but with your use of thread::join(). Boost::threads start as soon as they are constructed, join() means: wait until they are finished. In your test code, it doesn't make sense to join() your threads before you Stop() them. Probably the next is what you meant: Threading::boost_thread_starter starter3((Threading::Runnable *)&writer2); boost::thread* _writer_thread2 = new boost::thread(starter3); // pause for 5 secs boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += 5; boost::thread::sleep(xt); writer2.Stop(); _writer_thread2->join(); Cya, Geert.

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Threading problem
by Damien McGivern 12 Feb '04

12 Feb '04

(First post) Hi, I've just started working with boost and have come into some trouble with the thread class. I've included the test code that I'm having the problem with in the hope that someone could point out to me where I'm going wrong. The code tests the QueueAccessor class (CommandQueue.hpp) with the test code in CommandQueueTest.hpp. I created a base class (Runnable) to aid in creating a thread that runs an object's method rather than a function. The code compiles OK and seems to run OK too at first until I realised that the main thread has somehow become one of the threads that I created and is in a continuous loop after the first join() is called _writer_thread1->join(); // line 21 As you can probably guess from my code my background is in Java so I'm not entirely sure if I'm using the boost::thread correctly. I tested the QueueAccessor using threads that use a static worker function instead of an object's method and it seemed to run OK so I'm assuming that the problem lies with the Runnable base class. I'm using boost version 1.31.0 running Windows XP and using VS.Net 2003 to compile/run the code. Any help will be very much appreciated Cheers mcgiv ___________________________________________________________ BT Yahoo! Broadband - Free modem offer, sign up online today and save £80 http://btyahoo.yahoo.co.uk #ifndef __TEST_COMMANDQUEUE2__ #define __TEST_COMMANDQUEUE2__ #include <Universal/CommandQueue.hpp> #include <Threading/Runnable.hpp> using namespace Universal; boost::mutex _iomutex; class Worker : public Threading::Runnable { public: Worker(QueueAccessor* q):Threading::Runnable(), _queue(q), _pause_sec(0){} void Run() { while(this->_running) { this->Do(); if(this->_pause_sec > 0) this->Pause(this->_pause_sec); } } virtual void Do() = 0; protected: QueueAccessor* _queue; int _pause_sec; }; class Writer : public Worker { public: Writer(QueueAccessor* q):Worker(q),_index(0){ this->_pause_sec = 2; } void Do() { boost::mutex::scoped_lock scoped_lock(_iomutex); QueueItem item("hi there", this->_index++); this->_queue->Push(item); std::cout << "Add" << std::endl; } short _index; void Stop() { boost::mutex::scoped_lock scoped_lock(_iomutex); this->_running = false;//Threading::Runnable::Stop(); std::cout << "Stopped Writer" << std::endl; } }; class Reader : public Worker { public: Reader(QueueAccessor* q):Worker(q){} void Do() { while(this->_queue->Size() == 0){} boost::mutex::scoped_lock scoped_lock(_iomutex); QueueItem item = this->_queue->Pop(); std::cout << "Removed id=" << item._data_len << " Data=" << item._data << std::endl; } void Stop() { boost::mutex::scoped_lock scoped_lock(_iomutex); this->_running = false;//Threading::Runnable::Stop(); std::cout << "Stopped Reader" << std::endl; } }; void test() { QueueAccessor* q = new QueueAccessor(); Reader reader(q); Writer writer1(q); Writer writer2(q); // set up threads Threading::boost_thread_starter starter((Threading::Runnable *)&reader); boost::thread* _reader_thread = new boost::thread(starter); Threading::boost_thread_starter starter2((Threading::Runnable *)&writer1); boost::thread* _writer_thread1 = new boost::thread(starter2); Threading::boost_thread_starter starter3((Threading::Runnable *)&writer2); boost::thread* _writer_thread2 = new boost::thread(starter3); // start threads _writer_thread1->join(); _writer_thread2->join(); _reader_thread->join(); // pause for 5 secs boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += 5; boost::thread::sleep(xt); reader.Stop(); writer1.Stop(); writer2.Stop(); delete q; char c; std::cin >> c; } #endif __TEST_COMMANDQUEUE2__ #ifndef __IRUNNABLE__ #define __IRUNNABLE__ #include <boost/thread/thread.hpp> #include <boost/thread/xtime.hpp> namespace Threading { class Runnable { public: Runnable():_running(true){} virtual void Run() = 0; virtual void Stop(){_running = false;} protected: bool _running; // sleeps thread for x sec void Pause(int sec) { boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += sec; boost::thread::sleep(xt); } void Pause(int sec, int ns) { boost::xtime xt; boost::xtime_get(&xt, boost::TIME_UTC); xt.sec += sec; xt.nsec += ns*1000; boost::thread::sleep(xt); } }; // used to pass the Runnable object to the thread's start function struct boost_thread_starter { boost_thread_starter(Runnable* runnable):_runnable(runnable){} // function is called when boost::thread starts void operator()() { // start the Runnable's run method _runnable->Run(); } Runnable* _runnable; }; }// end Threading namespace #endif // __IRUNNABLE__ #ifndef __COMMANDQUEUE__ #define __COMMANDQUEUE__ #include <boost/thread/mutex.hpp> #include <queue> namespace Universal { struct QueueItem { /* QueueItem(int thread, int value):_thread(thread), _value(value){} int _thread; int _value; //*/ QueueItem(char *data, short data_len):_data(data), _data_len(data_len){} char *_data; short _data_len; //*/ }; // used to sync access to the queue class QueueAccessor { public: QueueAccessor(){} void Push(QueueItem item) { boost::mutex::scoped_lock scoped_lock(_mutex); _queue.push(item); } QueueItem Pop() { boost::mutex::scoped_lock scoped_lock(_mutex); if( _queue.size() > 0 ) { QueueItem tmp = _queue.front(); _queue.pop(); return tmp; } } int Size() { return _queue.size(); } protected: std::queue<QueueItem> _queue; boost::mutex _mutex; }; }// Universal namespace #endif // __COMMANDQUEUE__

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[BGL] adjacency_list: edge_descriptor ordering
by Ded Panas 12 Feb '04

12 Feb '04

Hi boost! How to store edge descriptors in a sorted container? There is no operator< for this type. Is it considered useless? In my graph building code I first build graph structure, and than calculate properties. So I need to remember edge descriptors between that stages... Also, about the docs: there is no link from Table of Contents to AdjacencyMatrix.html, where edge() function is described. TIA dedpanas

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VTL question (sorry if this is slightly off-topic)
by Matt Verona 11 Feb '04

11 Feb '04

Hello, I was reviewing the View Template Library (VTL) - see http://www.zib.de/weiser/vtl/ ... and have a few questions regarding Views as applied to STL Maps. I was also wondering if Boost was planning to eventually provide a VTL-like framework? I'm looking for a type of View that provides read-only access to an STL map, with only const iterators, but also provides limited insertion and removal access as well (as shown below): This new limited View-like map will only allow clients to iterate using const iterators, and also provides only one public insert(const key&) and one erase(const key&) method. These insert and erase member functions need to be implemented as "Template Method Functions", as follows: (see Design Patterns) * Note: these are shown using the latest SGI STL implementation (i.e., the _M_t.insert_unique and _M_t.erase calls) virtual bool preInsert(const value_type&) { return true; } pair<iterator, bool> insert(const value_type& x) { if(preInsert(x) { return _M_t.insert_unique(x); } return make_pair(end(), false); // make compiler happy } virtual bool preErase(const key_type&) { return true; } size_type erase(const key_type& x) { if(preErase(x) { return _M_t.erase(x); } return 0; // make compiler happy } The preInsert and preErase methods are virtual Hook Methods, and derived classes override these to add behavior to the (non-virtual) insert and erase functions.. Another nice addition to this map view would be a const _Tp& operator[](const key_type& k) const function, implemented something like this: const _Tp& operator[](const key_type& k) const { const_iterator i = lower_bound(k); if(i == end() || key_comp(k, (*i).first)) // if i->first is >= k throw SearchError(k); return (*i).second; } * Note: this simple implementation assumes that the key can be converted to a string in the constructor of the SearchError exception object. I have at least three Manager-like (Mediator) classes that can use this pattern (i.e., derived from this Map View class) as well as others that need a vector view with a similar filtered design... Thanks in advance, ~Matt Verona Houston, Texas USA

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[BGL] adjacency_list: OutEdgeList and EdgeList
by Ded Panas 11 Feb '04

11 Feb '04

I'm somewhat unclear about the difference between OutEdgeListS and EdgeListS selectors of adjacency_list. My questions is: 1. Why EdgeListS defaults to listS, while OutEdgeListS to vecS (BTW, doc says that EdgeListS defaults to vecS also) ? 2. In the docs ("Choosing the Edgelist and VertexList"), what is Edgelist: OutEdgeListS or EdgeListS? It is unclear (seems it is OutEdgeListS). TIA dedpanas

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RE: [Boost-users] Re: Re: Thread creation state
by Kutch, Patrick G 11 Feb '04

11 Feb '04

Looking at the code, by 1st guess would be that you have a race condition. tObj->runthread() is getting executed before tObj->createthead() has finished its business and the worker thread has actually entered the mutex. Meaning that tObj->runthread() calls the notify_one() BEFORE the actual worker thread does a wait. Thus when your threadproc does a lock and then a wait, it will wait forever because nothing will do the notify_one() again. Race conditions are funny things, may work perfectly on one box forever, then change one line of code, or take it to another system and bad things happen. May also behave differently under different OS's - mutexes are a prime examle of this, under Windows they seem to be recursive by default, but not under LINUX. A down and dirty way to see if my theory is correct, put in a delay between the tObj->createthread() and tObj->runthread() lines. Hope this helps - if it does praise me with thanx, if it doesn't it was a crackpot theory or I haven't had sufficient coffee yet to make an intelligent analysis - you pick. :-) good luck, - Patrick -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Michael Glassford Sent: Wednesday, February 11, 2004 7:40 AM To: Boost Users mailing list Subject: [Boost-users] Re: Re: Thread creation state What I meant was, can you post a complete sample that you have actually compiled and run and that has actually demonstrated the problem? That obviously isn't the case with the code you posted because it contains syntax errors and the main() function in your second post doesn't match the definition of the testCommand class in your first post. Having said that, I fixed the errors the best I could and don't see the problem. It would help if you could: 1) Tell me what compiler and compiler version you're using. 2) Tell me what Boost version you're using. 3) Post a complete code sample that demonstrates the problem. 4) Specify what compile and link options you're using (perhaps you could attach a make file or project file?) Sorry; I'm trying to help, but if you want me to be able to figure out the problem you'll have to help me out. Mike ----- Original Message ----- From: <janardhan.guptha(a)efi.com> Newsgroups: gmane.comp.lib.boost.user Sent: Tuesday, February 10, 2004 11:32 PM Subject: RE: Re: Thread creation state > > The rest of the applicatin is just creating the object and preparing it > for execution. I am using Win32 version of boost.Thread implementation. > > The creation code snipet is > > void main() { > testCommand *tObj = new testCommand(11); > tObj->createthread(); > tObj->runthread(); > } > > > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org]On Behalf Of Michael > Glassford > Sent: Wednesday, February 11, 2004 12:17 AM > To: boost-users(a)lists.boost.org > Subject: [Boost-users] Re: Thread creation state > > > It would be a lot easier to help if you could post a complete, > compilable example that demonstrates the problem. Also, it would be > useful to know whether you are using the Win32, pthread, or Mac > implementation of Boost.Thread. > > Thanks, > > Mike > > > <janardhan.guptha(a)efi.com> wrote in message > news:433CFA26BCA852438922F929E3D07955AE53A7@blraddc02.efi.internal... > > I am creating a boost thread, how to know in which state it is > created. > > I have a code snippet that is waiting always in the thread creatin > functon > > istelf. Where as i tried with some boost samples, they are working > amazingly > > perfect. This is how my code snippet looks like > > > > typedef boost::mutex::scoped_lock lock; > > class testCommand { > > static void threadfunc() { > > testCommand *testObj = mMapCommand[mObjID]; > > testObj->processthread(); > > }; > > > > static map< int mObjID, testCommand*> mMapCommand; > > private: > > void createthread() { > > mThread = new boost::thread(&testCommand::threadfunc); > > } > > void processthread() { > > lock lk(mMutex); > > mCondition.wait(lk); > > //// Some Action > > }; > > > > void runthread() { > > lock lk(mMutex); > > mCondition.notify_one(); > > }; > > > > public: > > static int mObjID; > > boost::thread *mThread; > > boost::condition mCondition; > > boost::mutex mMutex; > > }; > > > > > > The newly created thread is waiting at the following location > forever, by > > the time > > i get a chance to execute the new thread is greatly delayed. > > > > NTDLL! 77f8856e() > > boost::detail::thread::lock_ops<boost::mutex>::unlock(boost::mutex & > {...}) > > line 49 > > boost::detail::thread::scoped_lock<boost::mutex>::unlock() line 85 + > 11 > > bytes > > > boost::detail::thread::scoped_lock<boost::mutex>::~scoped_lock<boost:: > mutex> > > () line 74 > > `anonymous namespace'::thread_param::started() line 47 + 15 bytes > > thread_proxy(void * 0x0012fd74) line 71 > > _threadstartex(void * 0x00961040) line 212 + 13 bytes > > KERNEL32! 7c57b382() > > > > It sounds like i am missing something here. The queries here are > > 1. why it is waiting at the above specified line forever ? > > 2. Where can i get few worth thread samples done using boost::thread > > > > Regards > > Janardhan > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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RE: [Boost-users] Re: Conversions between shared_ptr<Base>andshared_ptr<Derived>
by Ben Hutchings 11 Feb '04

11 Feb '04

Konstantin Baumann <boost(a)ks-baumann.de> wrote: > For performance reasons I would like to see something like the > following conversion operators in shared_ptr<T>: > > template<class T> > class shared_ptr { > public: > ... > template<class S> > operator shared_ptr<S>&() throw() { > BOOST_STATIC_ASSERT(T* is convertible to S*); > return reinterpret_cast<shared_ptr<S>&>(*this); > } > > template<class S> > operator const shared_ptr<S>&() throw() const { > BOOST_STATIC_ASSERT(T* is convertible to S*); > return reinterpret_cast<const shared_ptr<S>&>(*this); > } > > }; // class shared_ptr<T> > > This would mimic the standard conversion from T* to S* without any > performance penalty for shared_ptr<T>. <snip> Don't sacrifice correctness for performance. First, the reinterpret_cast results in undefined behaviour. If you think you know that the actual behaviour is OK, you are wrong. If S is a base class of T then the conversion of T* to S* generally requires changing the bits of the pointer, unless S is the first non-virtual base. Second, if we can create a reference of type shared_ptr<S> to an object of type shared_ptr<T>, then we can also modify that object to contain a pointer of type S* which may not be convertible to T*.

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RE: [Boost-users] Re: Thread creation state
by janardhan.guptha＠efi.com 11 Feb '04

11 Feb '04

The rest of the applicatin is just creating the object and preparing it for execution. I am using Win32 version of boost.Thread implementation. The creation code snipet is void main() { testCommand *tObj = new testCommand(11); tObj->createthread(); tObj->runthread(); } -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org]On Behalf Of Michael Glassford Sent: Wednesday, February 11, 2004 12:17 AM To: boost-users(a)lists.boost.org Subject: [Boost-users] Re: Thread creation state It would be a lot easier to help if you could post a complete, compilable example that demonstrates the problem. Also, it would be useful to know whether you are using the Win32, pthread, or Mac implementation of Boost.Thread. Thanks, Mike <janardhan.guptha(a)efi.com> wrote in message news:433CFA26BCA852438922F929E3D07955AE53A7@blraddc02.efi.internal... > I am creating a boost thread, how to know in which state it is created. > I have a code snippet that is waiting always in the thread creatin functon > istelf. Where as i tried with some boost samples, they are working amazingly > perfect. This is how my code snippet looks like > > typedef boost::mutex::scoped_lock lock; > class testCommand { > static void threadfunc() { > testCommand *testObj = mMapCommand[mObjID]; > testObj->processthread(); > }; > > static map< int mObjID, testCommand*> mMapCommand; > private: > void createthread() { > mThread = new boost::thread(&testCommand::threadfunc); > } > void processthread() { > lock lk(mMutex); > mCondition.wait(lk); > //// Some Action > }; > > void runthread() { > lock lk(mMutex); > mCondition.notify_one(); > }; > > public: > static int mObjID; > boost::thread *mThread; > boost::condition mCondition; > boost::mutex mMutex; > }; > > > The newly created thread is waiting at the following location forever, by > the time > i get a chance to execute the new thread is greatly delayed. > > NTDLL! 77f8856e() > boost::detail::thread::lock_ops<boost::mutex>::unlock(boost::mutex & {...}) > line 49 > boost::detail::thread::scoped_lock<boost::mutex>::unlock() line 85 + 11 > bytes > boost::detail::thread::scoped_lock<boost::mutex>::~scoped_lock<boost:: mutex> > () line 74 > `anonymous namespace'::thread_param::started() line 47 + 15 bytes > thread_proxy(void * 0x0012fd74) line 71 > _threadstartex(void * 0x00961040) line 212 + 13 bytes > KERNEL32! 7c57b382() > > It sounds like i am missing something here. The queries here are > 1. why it is waiting at the above specified line forever ? > 2. Where can i get few worth thread samples done using boost::thread > > Regards > Janardhan _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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RE: [Boost-users] long compilation time of variant over long typelist with gcc
by Ben Hutchings 11 Feb '04

11 Feb '04

Graeme Lufkin <gwl(a)u.washington.edu> wrote: <snip> > When I compile code that declares a variable of this variant > type, the compilation takes unreasonably long (like, 1.5 hours on a > 2Ghz machine). For fewer types it goes much quicker, the transition > to unreasonably long happens around 14 types in the mpl::vector. <snip> > Something else I've noticed: the Intel compiler doesn't have the > compilation problem! I've attached sample case code that uses 16 > types, which takes less than 5 seconds to compile with Intel 8.0 and > almost 200 with GCC 3.2.2 (both on linux). > When I try the full 20 types I need, GCC chugs for several > hours, which is unacceptable for my project. Is there anything I can > do, or is this a GCC shortcoming that I need to wait for? I suggest you try newer versions of GCC (3.3 and 3.4 beta); if those still have the problem then report this as a bug at <http://gcc.gnu.org/bugs.html> with the keyword "compile-time-hog". Also check whether the poor performance is due to swapping, which indicates excessive use of memory and not necessarily excessive use of CPU time.

1 0

Spirit: pt_parse doesn't compile when using phrase_scanner_t for rules
by Steve Folly 11 Feb '04

11 Feb '04

Hi, I've read FAQ question number one about the free parse() function not compiling when and I've managed to get that to work by using rule<phrase_scanner_t> as suggested. However, I need to use the pt_parse method to create a parse tree. I'm obviously missing something really obvious because now pt_parse wont compile, even though I'm using a phrase_scanner_t because of the space_p skip parser. Any pointers most welcome. Thanks. Steve.

2 2

long compilation time of variant over long typelist with gcc
by Graeme Lufkin 10 Feb '04

10 Feb '04

I've recently become excited by the variant class and the apply_visitor technique. I've got a list of about 20 types that I want to handle in my variant (they're all related, so I won't need to supply 20 operator() to my visitors!). So I create a mpl::vector of the types, and then use make_variant_over to create my particular variant type. All this works fine (modulo a few days struggling to learn mpl stuff). When I compile code that declares a variable of this variant type, the compilation takes unreasonably long (like, 1.5 hours on a 2Ghz machine). For fewer types it goes much quicker, the transition to unreasonably long happens around 14 types in the mpl::vector. Side question: I finally found the macros BOOST_MPL_USE_PREPROCESSED_HEADERS and BOOST_MPL_LIMIT_VECTOR_SIZE that I had to suitably define to use such large mpl::vector-s. Are these documented anywhere, or am I missing the "suggested" way to do this? Something else I've noticed: the Intel compiler doesn't have the compilation problem! I've attached sample case code that uses 16 types, which takes less than 5 seconds to compile with Intel 8.0 and almost 200 with GCC 3.2.2 (both on linux). When I try the full 20 types I need, GCC chugs for several hours, which is unacceptable for my project. Is there anything I can do, or is this a GCC shortcoming that I need to wait for? -- - Graeme gwl(a)u.washington.edu "This sentence contains exactly threee erors."

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Re: building boost with sunpro compilers
by King, William D 10 Feb '04

10 Feb '04

Thanks for your comments. The list sort problem is in the binary_search_test. binary_search_test.cpp in the utility library fails for sunpro 5.5 and 5.4, so sun needs to use the same workaround that begins in line 120 for DINKUMWARE and VC6. I will check my notes to find where the member template friends were an issue. It was something I found in 1.30.0, so, I am not sure if it will also be an issue in 1.31.0. So far, compiling 1.31.0 with sunpro is giving me much more trouble than either 1.30.0 or 1.30.2; sunpro doesn't like some of the iterator_facade code, which causes the filesystem library and several other tests to fail to compile. Davis King william.d.king(a)bankofamerica.com -----Original Message----- >From: boost-users-request(a)lists.boost.org >Message: 7 >Date: Tue, 10 Feb 2004 11:52:13 -0500 >From: Christopher Currie <christopher(a)currie.com> >Subject: [Boost-users] Re: building boost with sunpro compilers >To: boost-users(a)lists.boost.org >Message-ID: <c0b27u$luu$1(a)sea.gmane.org> >Content-Type: text/plain; charset=us-ascii; format=flowed >> The main fixes I have found so far is that for 5.5 and 5.4, >> BOOST_NO_LIST_SORT and BOOST_NO_MEMBER_TEMPLATE_FRIENDS need to be defined. >Can you point up which tests lead you to this conclusion? >Sun is supposed to be releasing an Early Access version of their next >compiler in the near future; I'll be focusing regressions and bugfixes >on that version once it's available. >Christopher ------------------------------

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Thread creation state
by janardhan.guptha＠efi.com 10 Feb '04

10 Feb '04

I am creating a boost thread, how to know in which state it is created. I have a code snippet that is waiting always in the thread creatin functon istelf. Where as i tried with some boost samples, they are working amazingly perfect. This is how my code snippet looks like typedef boost::mutex::scoped_lock lock; class testCommand { static void threadfunc() { testCommand *testObj = mMapCommand[mObjID]; testObj->processthread(); }; static map< int mObjID, testCommand*> mMapCommand; private: void createthread() { mThread = new boost::thread(&testCommand::threadfunc); } void processthread() { lock lk(mMutex); mCondition.wait(lk); //// Some Action }; void runthread() { lock lk(mMutex); mCondition.notify_one(); }; public: static int mObjID; boost::thread *mThread; boost::condition mCondition; boost::mutex mMutex; }; The newly created thread is waiting at the following location forever, by the time i get a chance to execute the new thread is greatly delayed. NTDLL! 77f8856e() boost::detail::thread::lock_ops<boost::mutex>::unlock(boost::mutex & {...}) line 49 boost::detail::thread::scoped_lock<boost::mutex>::unlock() line 85 + 11 bytes boost::detail::thread::scoped_lock<boost::mutex>::~scoped_lock<boost::mutex> () line 74 `anonymous namespace'::thread_param::started() line 47 + 15 bytes thread_proxy(void * 0x0012fd74) line 71 _threadstartex(void * 0x00961040) line 212 + 13 bytes KERNEL32! 7c57b382() It sounds like i am missing something here. The queries here are 1. why it is waiting at the above specified line forever ? 2. Where can i get few worth thread samples done using boost::thread Regards Janardhan

2 1

How to export arrays from C(++) to python using boost
by Shukla, Nitin (Export) 10 Feb '04

10 Feb '04

I want to export an array of int and floats from C(++) to python using Boost but don't know how? Can anyone help me out? Is there any tutorials specifically on C(++)/Python interfacing using the Boost tool? I also want to export the BOOL type of C(++) to Python. How can I do that? --Nitin

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building boost with sunpro compilers
by King, William D 10 Feb '04

10 Feb '04

Hello, I've been wondering if anyone else is trying to build boost on Solaris with recent sunpro compilers. In 1.31.0, the config files warn if you use any version later than 5.3, while the regression tests are running on 5.4, and Sun's latest release is 5.5. The main fixes I have found so far is that for 5.5 and 5.4, BOOST_NO_LIST_SORT and BOOST_NO_MEMBER_TEMPLATE_FRIENDS need to be defined. I would be interested in comparing notes and fixes with anyone else using Sunpro 5.5 (0x550). Thanks, Davis King william.d.king(a)bankofamerica.com

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Re: [Boost-users] Problems with boost build setup
by Michael Buksas 10 Feb '04

10 Feb '04

On Sat, 31 Jan 2004 07:55:27 -0700, Jeff Garland wrote > First off, what version of bjam and boost are you using? I'm going to > assume version 1.30.2 of boost. It looks like boost-jam 3.1.7 from the rpm, and boost 1.30.2. > I think that bjam isn't that great at compiling outside of the boost > directory tree in the 1.30.2 version (I'm sure someone will correct me > if I'm offbase here :). This is a surprise. I had just assumed that the boost-jam would work the same way on user projects as in the library itself. Well, you know what they say about assuming... I'll ask about the install option at the jamboost list. Thanks for the pointer. In the meantime, is copying the libraries and using makefiles for application code typically what people do to link against boost libraries currently? Thanks again, Mike -- Michael Buksas <mb1(a)buksas.net>

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how to expose the func like "print( char * str, ... )" ?
by iceryeah 09 Feb '04

09 Feb '04

hello, problem 1: i can expose the function like void a( void ) def( "a", a ); but there is anthor function like this: void DebugMessage( char *msg,... ); i don't know how to expose this function. problem 2: module test int num = 0; void set( int a ) { num = a; } then i expose set func , and do this in script: import test test.set( 10 ) and then in host app, i check the var num, it is not 10,why? thanks very much.

2 1

Spirit: a skip parser that counts newlines?
by Steve Folly 09 Feb '04

09 Feb '04

Hi, Before I launch into it, does anybody have an example of a parser that can count newlines. I would have thought this would be quite common, so I'm surprised to see it's not standard within Spirit? (Or maybe I didn't look hard enough?) I'm writing a parser which will parse multi-line files. I'd like to report an error along with a line number. I realise the error can't be detailed - e.g. what the parser expected, rather, just 'an error' - which why I'd like the line number to at least give the user a fighting chance. I assume the parser simply stops at the point where parsing failed, and thus I'd know the line number? I'm guessing I'd have to supply this as a custom skip parser to the parse method? Thanks for any clues. -- Regards, Steve.

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RE: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C:
by Ben Hutchings 09 Feb '04

09 Feb '04

Someone using the wrong account to write email <Administrator(a)sbcltd.com> wrote: > Wayne, > > There might still be conflicts if the compiler can't place everything > into it's proper namespace. In addition, some sdk's force > everything into std namespace Really? That would be truly evil. > or into the global namespace. If you use "using namespace boost;", > you're basically doing the same thing. > > There are a couple of options that could be used separately. <snip> > 2. The second is wrap the offending sdk in it's own namespace. Here > is what I have come up with. I have three files here. c.h is the > original function. b.h wraps it in it's own namespace, and main.cpp > can only use it with the new namespace. Simple example, but hopefully > it illustrates what I'm trying to get across. <snip> That's all very well for inline code, but how about external code that's linked in later, that has been compiled without using the namespace? By the way, possessive "its" has no apostrophe.

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[BGL] Removing vertices and internal properties
by Frédéric Mayot 09 Feb '04

09 Feb '04

Hi, I have a graph in the form of an adjacency_list with an internal property. I'm using vecS for both vertices and edges (and I don't want to use listS). When I remove a vertex with remove_vertex(), it seems that my property map is invalidated. Can I remove the property (from the map) which corresponds to the deleted vertex ? Is there any solution ? Thanks. Fred

2 1

Dynamic Multi Array Library
by RGProlog＠aol.com 09 Feb '04

09 Feb '04

Is anyone interested in dynamic_multi_array template library that offers user intuitive convenience of use as well as capacity to hone in upon any specific subset of a multi-dimensional array? As an example of usage, a dynamic_multi_array object can be constructed and then resized and then reshaped like this: size_t arrayShape = { 3, 7, 15}; dynamic_multi_array<double, 3> A(arrayShape); boost::array<size_t, 3> anotherArrayShape = {{ 5, 4, 22}}; A.resize(anotherArrayShape); boost::array<size_t, 5> yetAnotherArrayShape = {{ 440, 1, 1, 0, 0}} ; A.reshape(yetAnotherArrayShape); size_t stillAnotherArrayShape[4] = { 22, 10, 2, 11}; A.reshape(stillAnotherArrayShape); The library’s design owes a lot to Andrei Alexandrescu’s ideas. It is based on the data_table helper class template defined as follows: template<typename X> class data_table { … protected: std::vector<X> data_table_ ;}; template<> <value_type> class data_table { … protected: value_type* data_table_ ;}; Then, a sequence of the table class instantiation types is recursively defined and then given a name that is shared in different dimensional contexts as follows: typedef data_table<value_type> data_table_01; ……………………………………………. typedef data_table< data_table_49 > data_table_50 ; class Int2Type<int> { typedef data_table_01 data_table; } …………………………………………… class Int2Type<> <50> { typedef data_table_50 data_table; } Being a recursive template class, the data_table is implemented in a concise code that is mostly about stating a few recursive rules and implementing some access operators and is totally dimension independent. This is the central feature of the design since the user level wrapper class template by virtue of exporting a dimension appropriate data_table instantiation that uses its shared name template <T, size_t i, Allocator> class dynamic_multi_array { ………………………………………. typedef …. class Int2Type <i>::data_table; } is also implemented in a way that hides all the implementation details, is concise and dimension independent, thus providing user with a great deal of flexibility, syntax safety, and, in case of a new user, a flat learning curve. This is a std::vector based design. The dynamic_multi_array template class, the library’s main component, extends, where appropriate, std::vector capacities, replicates its exception safety guarantees and has std::vector as its back end storage device. The library’s code, documentation that includes a short tutorial and a few key tests and will be posted in Dynamic Multi Array Folder on boost Files once the issue of available space will be resolved.

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(no subject)
by RGProlog＠aol.com 09 Feb '04

09 Feb '04

Is anyone interested in dynamic_multi_array template library that offers user intuitive convenience of use as well as capacity to hone in upon any specific subset of a multi-dimensional array? As an example of usage, a dynamic_multi_array object can be constructed and then resized and then reshaped like this: size_t arrayShape = { 3, 7, 15}; dynamic_multi_array<double, 3> A(arrayShape); boost::array<size_t, 3> anotherArrayShape = {{ 5, 4, 22}}; A.resize(anotherArrayShape); boost::array<size_t, 5> yetAnotherArrayShape = {{ 440, 1, 1, 0, 0}} ; A.reshape(yetAnotherArrayShape); size_t stillAnotherArrayShape[4] = { 22, 10, 2, 11}; A.reshape(stillAnotherArrayShape); The library’s design owes a lot to Andrei Alexandrescu’s ideas. It is based on the data_table helper class template defined as follows: template<typename X> class data_table { … protected: std::vector<X> data_table_ ;}; template<> <value_type> class data_table { … protected: value_type* data_table_ ;}; Then, a sequence of the table class instantiation types is recursively defined and then given a name that is shared in different dimensional contexts as follows: typedef data_table<value_type> data_table_01; ……………………………………………. typedef data_table< data_table_49 > data_table_50 ; class Int2Type<int> { typedef data_table_01 data_table; } …………………………………………… class Int2Type<> <50> { typedef data_table_50 data_table; } Being a recursive template class, the data_table is implemented in a concise code that is mostly about stating a few recursive rules and implementing some access operators and is totally dimension independent. This is the central feature of the design since the user level wrapper class template by virtue of exporting a dimension appropriate data_table instantiation that uses its shared name template <T, size_t i, Allocator> class dynamic_multi_array { ………………………………………. typedef …. class Int2Type <i>::data_table; } is also implemented in a way that hides all the implementation details, is concise and dimension independent, thus providing user with a great deal of flexibility, syntax safety, and, in case of a new user, a flat learning curve. This is a std::vector based design. The dynamic_multi_array template class, the library’s main component, extends, where appropriate, std::vector capacities, replicates its exception safety guarantees and has std::vector as its back end storage device. The library’s code, documentation that includes a short tutorial and a few key tests and will be posted in Dynamic Multi Array Folder on boost Files once the issue of available space will be resolved. P.S. The space issue is that I freed the space I previously occupied on boost Files and still cannot post the message. Need help here.

1 0

RE: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C:
by Dernoncourt, Wayne CTR NAVAIR 3184, ,10 09 Feb '04

09 Feb '04

Thanks much. I think the folks here have sent a message (I leave here a little after 1:30 on Friday and discussion sometimes takes a while) to the other SDK developers asking if they could put their SDK in a namespace and do this the "right" way instead of this round-about method. But yes this could work as well. Thanks much. -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org]On Behalf Of Administrator Sent: Friday, February 06, 2004 12:57 To: 'Boost Users mailing list' Subject: RE: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C: Wayne, There might still be conflicts if the compiler can't place everything into it's proper namespace. In addition, some sdk's force everything into std namespace or into the global namespace. If you use "using namespace boost;", you're basically doing the same thing. There are a couple of options that could be used separately. 1. One is to not use "using namespace". Preface everything used from there with boost:: or std::. More typing, less pain, less chance for conflict. 2. The second is wrap the offending sdk in it's own namespace. Here is what I have come up with. I have three files here. c.h is the original function. b.h wraps it in it's own namespace, and main.cpp can only use it with the new namespace. Simple example, but hopefully it illustrates what I'm trying to get across. -------------------------------------------------- c.h ------------------------------------------------- #ifndef _C_H #define _C_H inline int garbage_method() { return 0; } #endif // -------------------------------------------------- b.h -------------------------------------------------- #ifndef _B_H #define _B_H namespace garbage_namespace { #include "c.h" } #endif // -------------------------------------------------- main.cpp -------------------------------------------------- #include "b.h" int main() { return garbage_namespace::garbage_method(); }

1 0

suspend/cancel thread
by janardhan.guptha＠efi.com 09 Feb '04

09 Feb '04

Hi, i working on an application using boost::thread. The application cretaes a thread, then put in wait state. Based on the user input i want the thread eitjer to move it to run state or cancel the thread. As i am newbie to boost thread, i couldn't find any documentation or working example that satisfies my requiremnt. So someone can help me out?? Rgds, Janardhan

3 2

std::map problem.
by Joshua Little 08 Feb '04

08 Feb '04

I'm working on making a factory class but have run into a problem. I think I'm trying to get the shared pointer out the wrong way. std::map<std::string, boost::shared_ptr<Logger> > LoggerFactory::loggers; boost::shared_ptr<Logger> LoggerFactory::getInstance(std::string& logger) { boost::shared_ptr<Logger> TheLogger; LoggerMap::iterator i = loggers.find(logger); if (!(*i).second.get()) { TheLogger.reset(new Logger()); loggers[logger] = TheLogger; } else { TheLogger = (*i).second; } return TheLogger; } I thought that the TheLogger = (*i).second line was the correct way to get any logger within the map but when I run it I get this segfault: Program received signal SIGSEGV, Segmentation fault. LoggerFactory::getInstance(std::string&) (logger=@0x22ff58) at e:/boost-1.30.2/boost/detail/shared_count.hpp:123 123 if(use_count_ == 0 && weak_count_ != 0) boost::throw_exception(boost::bad_weak_ptr()); if I comment out the 'TheLogger = (*i).second;' line everything seems to fine. Any ideas? Joshua.

2 2

Help with shared_ptrs please
by Steve Folly 08 Feb '04

08 Feb '04

Hi, I'd like some help trying to crack a problem I've got. Now, I am using shared pointers at the moment, and that might be part of my problem, or it might not, but I'll describe the situation and you can tell to go elsewhere if you like! :) Part of my application involves scripting - allowing the user to write file based scripts to execute within the context of an application. I've designed it so it also gives the ability for the application writer to create some 'scripts' by creating classes directly in the C++ code. The script has the ability to run in the main thread of the app, but some statements could potentially block, so each statement is run from a 'timer' event which gets scheduled immediately. Those that block wait for an event and continue on that event. This part is working well. The statements are classes constructed in a hierarchical manner with things like a block class (a statement itself) which has a list of statements in it, an if statement class - which has an expression evaluator, a statement for the 'then' part, and an optional statement for the 'else' part. You get the idea? After looking at boost::lambda I thought it would be nice if I could construct my script similar to how lambda does these sorts of control statements - the if_, switch_, for_ constructs. The idea I have is like: expression exp = ... If_statement s1 = if_( expr)->then_( s2 )->else_( s3 ); while_statement ws = while_( expr ).do_( s1 ); One of the things I decided early on was to use shared_ptrs. The while_ and if_ constructs are functions returning a shared pointer to the real if statement object. Now my problem: given the example above. The do_ method of a while_statement takes a shared pointer to a statement so I don't have to worry about deallocation. Constructing the if_ statement on it's own is no problem, but if I was to construct one directly within the do_ part of the while statement it wont compile: while_( expr ).do_( if_(expr)->then_(s2)->else_(s3) ); The problem is to be able to chain then_ and else_ together, I have to return a plain pointer because the if_ statement itself doesn't know about it's shared pointer. So now, the compiler complains that can't implicitly convert a plain if_statement pointer into a shared pointer. And even if it could, I don't have the original shared pointer to hand. Now, I hope you're all still listening at the back! :) My first thought was to somehow get the object to look after the shared pointer, but surely if the object has a reference to itself, the ref count of the shared pointer could never reach zero? As I said right at the beginning, I think is a problem I have with shared pointers, whether it be a misunderstanding about them or maybe I'm using them the wrong way? I could always go for scrapping the shared pointers all together, and make the classes responsible for their own (de)allocation, but I was rather hoping to avoid that. Any tips and suggestions on ways forward will be much appreciated. (Even if to say - "ha! it'll never work", or "try a another newsgroup"! :) TIA. -- Regards, Steve.

2 5

PreProcessor Library and Class Constructors
by Paul Grenyer 07 Feb '04

07 Feb '04

Hi All I fear I may be trying to get a square peg in a round hole, but here goes anyway... I'm trying to use the boost PreProcessor library to generate constructors with varying numbers of parameters. I've tried the following: #include <boost/preprocessor/arithmetic/inc.hpp> #include <boost/preprocessor/punctuation/comma_if.hpp> #include <boost/preprocessor/repetition.hpp> #ifndef MAX_CONCRETE_CONSTRUCTOR_PARAMS #define MAX_CONCRETE_CONSTRUCTOR_PARAMS 3 #endif #define CONCRETE_CONSTRUCTOR(Z, N, _) \ template<class R BOOST_PP_COMMA_IF(N) BOOST_PP_ENUM_PARAMS(N, class A)> \ explicit Concrete( BOOST_PP_ENUM_PARAMS(N, A) ) \ { } class Concrete { public: BOOST_PP_REPEAT(BOOST_PP_INC(MAX_CONCRETE_CONSTRUCTOR_PARAMS), CONCRETE_CONSTRUCTOR, _) }; int main() { Concrete a( 1, 2 ); return EXIT_SUCCESS; } But this gives me the following error: error C2660: 'Concrete::Concrete' : function does not take 2 arguments I have feeling I'm doing something very wrong or that can't be done. Regards Paul Paul Grenyer Email: paul(a)paulgrenyer.co.uk Web: http://www.paulgrenyer.co.uk Have you met Aeryn: http://www.paulgrenyer.co.uk/aeryn/? Version 0.3.0 beta now ready for download

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RE: [Boost-users] How to export arrays from C(++) to python using boost
by Shukla, Nitin (Export) 06 Feb '04

06 Feb '04

Hi, I working on an application where an array of ints and floats are to exported from C++ to Python using boost::python. As I am newbie to boost python, I couldn't find any documentation or working example that satisfies the above requirement. Can someone help me out?? Nitin. -----Original Message----- From: Shukla, Nitin (Export) [mailto:nitin.shukla@pw.utc.com] Sent: Thursday, February 05, 2004 3:19 PM To: 'boost-users(a)lists.boost.org' Subject: [Boost-users] How to export arrays from C(++) to python using boost I want to export an array of int and floats from C(++) to python using Boost but don't know how? Can anyone help me out? Is there any tutorials specifically on C(++)/Python interfacing using the Boost tool? I also want to export the BOOL type of C(++) to Python. How can I do that? --Nitin _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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RE: [Boost-users] configuring boost on MS Visual Studio 6 where t he installation drive isn't C:
by Administrator 06 Feb '04

06 Feb '04

Wayne, There might still be conflicts if the compiler can't place everything into it's proper namespace. In addition, some sdk's force everything into std namespace or into the global namespace. If you use "using namespace boost;", you're basically doing the same thing. There are a couple of options that could be used separately. 1. One is to not use "using namespace". Preface everything used from there with boost:: or std::. More typing, less pain, less chance for conflict. 2. The second is wrap the offending sdk in it's own namespace. Here is what I have come up with. I have three files here. c.h is the original function. b.h wraps it in it's own namespace, and main.cpp can only use it with the new namespace. Simple example, but hopefully it illustrates what I'm trying to get across. -------------------------------------------------- c.h ------------------------------------------------- #ifndef _C_H #define _C_H inline int garbage_method() { return 0; } #endif // -------------------------------------------------- b.h -------------------------------------------------- #ifndef _B_H #define _B_H namespace garbage_namespace { #include "c.h" } #endif // -------------------------------------------------- main.cpp -------------------------------------------------- #include "b.h" int main() { return garbage_namespace::garbage_method(); } -----Original Message----- From: Dernoncourt, Wayne CTR NAVAIR 3184, ,10 [mailto:wayne.dernoncourt@navy.mil] Sent: Friday, February 06, 2004 5:43 AM To: Boost Users mailing list Subject: RE: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C: Well that worked much better as far as it went (747 updated files out of 747 targets wth no skipped files and no failures). The version of the bjam binary was a little larger (~5k) than the one I compiled<scratches head>, but using this produced no errors. Unfortunately we still have at least a few problems. As I described originally we are using a highly specialized third party SDK. Part of this SDK redefines reverse_iterator (as well as min & max) evidently the MS Visual C++ reverse iterator is broken in some way. From a cursory examination of the two implementations, it appears that both the two are very similiar in functionality if not implementation. The issue with min/max could be eliminated by commenting out line 59 of boost/config/stllib/dinkumware.hpp (line defines BOOST_NO_STD_MIN_MAX). There doesn't appear to be a similiar line for the reverse iterator. One of the issues appears to be that this third party SDK doesn't seem to use namespaces for the SDK. From my limited understanding, for namespaces to be used effectively, the different libraries/SDK's would need to be in their own namespaces. If Boost had theirs and the third party used the global namespaces, there could still be conflicts. Is my understanding correct?

1 0

Conversions between shared_ptr<Base> and shared_ptr<Derived>
by Joshua Little 06 Feb '04

06 Feb '04

I've been using shared pointers for a few months now and just discovered I have been using them the wrong way, causing massive memory leaks. So I'm going back through my code and cleaning everything up and making the changes to correct all the mistakes I had been making. So now I've run into a bit of a problem. I'm using Boost 1.30.2 currently and I have function that takes in a Base class to place into a vector, but I have a number of Derived classes that will be going into the vector as well. From reading through the docs and the mailing lists everything seems to indicate that the conversion should be implicit and there shouldn't be a problem. I have the feeling I am missing something here so I was wondering if someone could point out my error. So I have something like this: std::vector<boost::shared_ptr<Base> > BaseVector; void add(boost::shared_ptr<Base>& newOne) { BaseVector.push_back(newOne); } and I call it like this usually : boost::shared_ptr<Derived> p(new Derived); add(p); I thought that it would work just like using raw pointers (which was working) but I get a compile time error that : no matching function call to add(boost::shared_ptr<Derived>&) canadites are add(boost::shared_ptr<Base>&).. ect. So I think I'm doing this the wrong way, about the only thing I can think of was something I saw in a few postings. Essentially creating a new pointer with the derived pointer then passing it into the function like this : boost::shared_ptr<Derived> p(new Derived); boost::shared_ptr<Base> q(p); add(q); Is that the preferred way of doing it? Or is there another step I'm missing when creating the shared_ptrs to allow them to be implicitly converted? Thanks, Joshua.

5 6

RE: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C:
by Dernoncourt, Wayne CTR NAVAIR 3184, ,10 06 Feb '04

06 Feb '04

Well that worked much better as far as it went (747 updated files out of 747 targets wth no skipped files and no failures). The version of the bjam binary was a little larger (~5k) than the one I compiled<scratches head>, but using this produced no errors. Unfortunately we still have at least a few problems. As I described originally we are using a highly specialized third party SDK. Part of this SDK redefines reverse_iterator (as well as min & max) evidently the MS Visual C++ reverse iterator is broken in some way. From a cursory examination of the two implementations, it appears that both the two are very similiar in functionality if not implementation. The issue with min/max could be eliminated by commenting out line 59 of boost/config/stllib/dinkumware.hpp (line defines BOOST_NO_STD_MIN_MAX). There doesn't appear to be a similiar line for the reverse iterator. One of the issues appears to be that this third party SDK doesn't seem to use namespaces for the SDK. From my limited understanding, for namespaces to be used effectively, the different libraries/SDK's would need to be in their own namespaces. If Boost had theirs and the third party used the global namespaces, there could still be conflicts. Is my understanding correct? -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org]On Behalf Of Administrator Sent: Thursday, February 05, 2004 15:11 To: 'Boost Users mailing list' Subject: RE: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C: Binaries of bjam are released separately. You can actually download a binary of bjam for nt at the bottom of the Sourceforge download page here: http://sourceforge.net/project/showfiles.php?group_id=7586 Also get the latest version (1.31.0) of boost as it has an easier install stage. The command-line should be: bjam "-sTOOLS=msvc" "-sMSVC_ROOT=D:\Progra~1\Micros~1" You can avoid all that if you execute vcvars32.bat and then do: bjam "-sTOOLS=msvc" That should si

1 0

Mac OS 10.3.2 Compiling Problems.
by Pierre-Michel Tremblay 06 Feb '04

06 Feb '04

Bonjour, I'm new to Boost. My platform is a PowerBook G4 running Mac OS X 10.3.2 with the following: [champignac:~] ptrembla% gcc -v Reading specs from /usr/libexec/gcc/darwin/ppc/3.3/specs Thread model: posix gcc version 3.3 20030304 (Apple Computer, Inc. build 1495) -downloaded boost-1.31.0.tar.gz -downloaded boost-jam-3.1.9.tgz -created a directory in ~/CVSROOTs and moved the two downloaded files there. -expanded downloaded boost-jam-3.1.7.tgz and ran build.sh -moved the executables created in ~/CVSROOTs/boost-jam-3.1.9/bin.macosxppc to /usr/bin -expanded boost-1.31.0.tar.gz and went to directory with jam files [champignac:~] ptrembla% cd /Users/ptremblay/CVSROOTs/boost_1_31_0 [champignac:~/CVSROOTs/boost_1_31_0] ptrembla% ls Jamfile boost.css people Jamfile.v2 c++boost.gif project-root.jam Jamrules doc rst.css LICENSE_1_0.txt google_logo_40wht.gif status README index.htm tools boost libs boost-build.jam more -set up my environment variables relating to Python within ~/.cshrc, i.e. set PYTHON_ROOT="/usr/bin/python" set PYTHON_VERSION="2.3" [champignac:~/CVSROOTs/boost_1_31_0] ptrembla% which python /usr/bin/python [champignac:~/CVSROOTs/boost_1_31_0] ptrembla% python -V Python 2.3 -ran bjam -sTOOLS=darwin [champignac:~/CVSROOTs/boost_1_31_0] ptrembla% which bjam /usr/bin/bjam [champignac:~/CVSROOTs/boost_1_31_0] ptrembla% cd /Users/ptremblay/CVSROOTs/boost_1_31_0 [champignac:~/CVSROOTs/boost_1_31_0] ptrembla% bjam -sTOOLS=darwin --------------------------------------------------------------------- skipping Boost.Python library build due to missing or incorrect configuration couldn't find Python.h in "/System/Library/Frameworks/Python.framework/Versions/2.2/include/ python2.2" You can configure the location of your python installation by setting: PYTHON_ROOT - currently "/System/Library/Frameworks/Python.framework/Versions/2.2" PYTHON_VERSION - The 2-part python Major.Minor version number (e.g. "2.2", NOT "2.2.1") - currently "2.2" The following are automatically configured from PYTHON_ROOT if not otherwise set: PYTHON_LIB_PATH - path to Python library object; currently PYTHON_INCLUDES - path to Python #include directories; currently "/System/Library/Frameworks/Python.framework/Versions/2.2/include/ python2.2" --------------------------------------------------------------------- ...patience... ...found 4834 targets... ...updating 315 targets... {Output cut here} MkDir1 bin/boost/libs/test MkDir1 bin/boost/libs/test/build MkDir1 bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib MkDir1 bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin MkDir1 bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/debug MkDir1 bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/debug/ shared-linkable-true darwin-C++-action bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/debug/ shared-linkable-true/execution_monitor.o darwin-C++-action bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/debug/ shared-linkable-true/cpp_main.o darwin-Link-DyLib-action bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/debug/ shared-linkable-true/libboost_prg_exec_monitor-d-1_31.dylib ld: Undefined symbols: cpp_main(int, char**) DYLD_LIBRARY_PATH=bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/debug/shared-linkable-true export DYLD_LIBRARY_PATH ld -dynamic -m -r -d -o "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ debug/shared-linkable-true/libboost_prg_exec_monitor-d-1_31.lo" "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ debug/shared-linkable-true/execution_monitor.o" "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ debug/shared-linkable-true/cpp_main.o" \ && \ c++ -g -Wl,-dynamic -nostartfiles -Wl,-dylib -Wl,-ldylib1.o -o "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ debug/shared-linkable-true/libboost_prg_exec_monitor-d-1_31.dylib" "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ debug/shared-linkable-true/libboost_prg_exec_monitor-d-1_31.lo" \ \ \ && \ rm -f "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ debug/shared-linkable-true/libboost_prg_exec_monitor-d-1_31.lo" ...failed darwin-Link-DyLib-action bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/debug/ shared-linkable-true/libboost_prg_exec_monitor-d-1_31.dylib... MkDir1 bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ release MkDir1 bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ release/shared-linkable-true darwin-C++-action bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ release/shared-linkable-true/execution_monitor.o darwin-C++-action bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ release/shared-linkable-true/cpp_main.o darwin-Link-DyLib-action bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ release/shared-linkable-true/libboost_prg_exec_monitor-1_31.dylib ld: Undefined symbols: cpp_main(int, char**) DYLD_LIBRARY_PATH=bin/boost/libs/test/build/ libboost_prg_exec_monitor.dylib/darwin/release/shared-linkable-true export DYLD_LIBRARY_PATH ld -dynamic -m -r -d -o "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ release/shared-linkable-true/libboost_prg_exec_monitor-1_31.lo" "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ release/shared-linkable-true/execution_monitor.o" "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ release/shared-linkable-true/cpp_main.o" \ && \ c++ -Wl,-x -Wl,-dynamic -nostartfiles -Wl,-dylib -Wl,-ldylib1.o -o "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ release/shared-linkable-true/libboost_prg_exec_monitor-1_31.dylib" "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ release/shared-linkable-true/libboost_prg_exec_monitor-1_31.lo" \ \ \ && \ rm -f "bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ release/shared-linkable-true/libboost_prg_exec_monitor-1_31.lo" ...failed darwin-Link-DyLib-action bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/ release/shared-linkable-true/libboost_prg_exec_monitor-1_31.dylib... {Output cut here} ...failed updating 6 targets... ...updated 309 targets... QUESTIONS Are these failures "normal"? If not, what can I do to make it compile correctly? What should I do to make Boost.Python to compile correctly with 2.3? Where are the files I should rectify to solve these errors? Many thanks. Pierre-Michel

1 0

Errors with #include "boost/test/included/test_exec_monitor.hpp"
by Shawn Church 05 Feb '04

05 Feb '04

I am having problems compiling using the included form of the test execution monitor library. I have not tried building the library seperately and linking. The following test illustrates the problem: #include "boost/test/included/test_exec_monitor.hpp" int test_main(int argc, char *argv[]) { BOOST_CHECK("TEST ME"); } /* When used with boost 1.30.2 Building Makefile: "C:\Dev-Cpp\Local\sql\Mingw32\Makefile.win" Executing make... make.exe -f "C:\Dev-Cpp\Local\sql\Mingw32\Makefile.win" all g++.exe -c ../src/test_main.cpp -o ../src/test_main.o -I"C:/Dev-Cpp/include/c++" -I"C:/Dev-Cpp/include/c++/mingw32" -I"C:/Dev-Cpp/include/c++/backward" -I"C:/Dev-Cpp/include" -I"C:/Dev-Cpp/Local/boost-1.30.2" <<<<< The only change is here. -fexceptions -fmessage-length=0 g++.exe ../src/test_main.o -o "Sql.exe" -L"C:/Dev-Cpp/lib" ../../../lib/libodbc32.a Execution terminated Compilation successful Output: Platform: Win32 Compiler: GNU C++ version 3.2 (mingw special 20020817-1) STL : GNU libstdc++ version 20020816 Boost : 1.30.2 Entering test case "call_test_main" ../src/test_main.cpp(5): info: test "TEST ME" passed C:/Dev-Cpp/Local/boost-1.30.2/libs/test/src/test_main.cpp(40): error in "call_test_main": test test_main_result == 0 || test_main_result == boost::exit_success failed Leaving test case "call_test_main" Test case "call_test_main" failed with: 1 assertion out of 2 passed 1 assertion out of 2 failed When compiling with 1.31.0 Compiler: Default compiler Building Makefile: "C:\Dev-Cpp\Local\sql\Mingw32\Makefile.win" Executing make... make.exe -f "C:\Dev-Cpp\Local\sql\Mingw32\Makefile.win" all g++.exe -c ../src/test_main.cpp -o ../src/test_main.o -I"C:/Dev-Cpp/include/c++" -I"C:/Dev-Cpp/include/c++/mingw32" -I"C:/Dev-Cpp/include/c++/backward" -I"C:/Dev-Cpp/include" -I"C:/Dev-Cpp/Local/boost_1_31_0" <<< The only change is here !!!!! -fexceptions -fmessage-length=0 In file included from C:/Dev-Cpp/include/boost/test/included/test_exec_monitor.hpp:20, from ../src/test_main.cpp:1: C:/Dev-Cpp/Local/boost_1_31_0/libs/test/src/execution_monitor.cpp:185: no `int boost::execution_monitor::run_function()' member function declared in class `boost::execution_monitor' C:/Dev-Cpp/Local/boost_1_31_0/libs/test/src/execution_monitor.cpp: In member function `int boost::execution_monitor::run_function()': C:/Dev-Cpp/Local/boost_1_31_0/libs/test/src/execution_monitor.cpp:186: `m_custom_translators' undeclared (first use this function) C:/Dev-Cpp/Local/boost_1_31_0/libs/test/src/execution_monitor.cpp:186: (Each undeclared identifier is reported only once for each function it appears in.) .... I deleted 100+ lines of errors here .... C:/Dev-Cpp/include/boost/test/detail/unit_test_monitor.hpp:51: `target_test_case_' undeclared (first use this function) C:/Dev-Cpp/include/boost/test/detail/unit_test_monitor.hpp:51: only constructors take base initializers C:/Dev-Cpp/include/boost/test/detail/unit_test_monitor.hpp:51: confused by earlier errors, bailing out make.exe: *** [../src/test_main.o] Error 1 Execution terminated */ I rechecked the release notes for the test library and did not see any reason why the above should not work. Maybe i am just missing something simple. Guess I will try building and linking it to see what happens. -- Shawn Church sl_church(a)sbcglobal.net

1 1

RE: [Boost-users] configuring boost on MS Visual Studio 6 where t he installation drive isn't C:
by Administrator 05 Feb '04

05 Feb '04

Binaries of bjam are released separately. You can actually download a binary of bjam for nt at the bottom of the Sourceforge download page here: http://sourceforge.net/project/showfiles.php?group_id=7586 Also get the latest version (1.31.0) of boost as it has an easier install stage. The command-line should be: bjam "-sTOOLS=msvc" "-sMSVC_ROOT=D:\Progra~1\Micros~1" You can avoid all that if you execute vcvars32.bat and then do: bjam "-sTOOLS=msvc" That should si -----Original Message----- From: Dernoncourt, Wayne CTR NAVAIR 3184, ,10 [mailto:wayne.dernoncourt@navy.mil] Sent: Thursday, February 05, 2004 10:16 AM To: Boost Users mailing list Subject: RE: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C: (I've been using MS Outlook for years and I still don't like the way it handles quoting like this!) Please pardon the newbieness, these are probably elmentary questions. It turns out the copy of Boost I have didn't have a bjam.exe (I don't know why) so I had to puzzle out how to build that (bad path, etc.) Now trying to figure out how to get Boost to build - done sort of. I don't see how this is going to examine the conflicts with the subset of RogueWave being used by the third party SDK. According to the results from the command "bjam" being executed in the D:\boost-1.30.2 directory: - failed updating 660 targets - skipped 234 targets - updated 260 targets (the actual number has scrolled off screen...) Looking back through the screens, there seem to be CALL "C:\Program Files\Microsoft\Visual Studio...", well that isn't right, it lives on D:, not C:. An earlier email suggested an S setting, so I tried: bjam "VC6_ROOT=D:\Progra~1\Micros~1" and it complains about not having Python (well, it hasn't been installed, we don't need it for this project, though it seems to be very popular) and then it complains about not knowning how to make VC6_ROOT=D:\same stuff. ...found 1 target ...can't find 1 target and it quits.

1 0

RE: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C:
by Dernoncourt, Wayne CTR NAVAIR 3184, ,10 05 Feb '04

05 Feb '04

Ahhhh, evidently vcvars32.bat wasn't being run to set some envrionment variables. Running this first makes a difference! Now 494 targets failed (there were 660 failing targets), 178 targets were skipped (there were 250). Of the failing targets most seem to be referencing mwcc (metro works c++ compiler?). Still not clear how some of this works. Trying to run the tests we came up with and now the complaining about missing boost/config.hpp... there it is, I can see it<jabbing my finger at the screen>. I'll fool with this some more in the AM... -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org]On Behalf Of Administrator Sent: Wednesday, February 04, 2004 14:54 To: 'Boost Users mailing list' Subject: RE: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C: Wayne, What configure script? Boost requires bjam.exe. If you follow the directions here: http://www.boost.org/more/getting_started.html you should have no problems. I have never had a problem with either MS Visual C++ 6.0 with regards to bjam, nor have I ever used a configure script with Boost. Cygwin is an alternative, but you shouldn't need it if you follow the getting started directions. Dale -----Original Message----- From: Dernoncourt, Wayne CTR NAVAIR 3184, ,10 [mailto:wayne.dernoncourt@navy.mil] Sent: Wednesday, February 04, 2004 9:17 AM To: Boost Users mailing list Subject: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C: For a number of reasons we don't have MS Visual Studio installed on the C: drive. We also have another SDK installed that uses part of Rogue Wave. Both libraries try to define min, max and a reverse iterator (there are items, those are the ones we've come across in an afternoon of experimentation). As I understand things, the ./configure script will look for conflicts with other libraries and try to work around them. The ./configure script is a bourne shell script, but there is no obvious way of running that script in Windows. One approach I thought of was to install cygwin to run the script, but that would have to invoke the MS C++ compiler (invoking a Windows based tool from inside of a Linux like environment), I'm not sure that would actually work. Are there alternatives that need to be explored? Would the cygwin approach actually work? (we are currently using MS Visual Studio 6 because of requirement of the other SDK) _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

1 0

Problem using new regex library
by John Eddy 05 Feb '04

05 Feb '04

Hello, I have just downloaded and installed 1.31.0. I am using MS VC7 and am having the following problem: The following code will not compile (whereas it did previously) #include <locale> using namespace std; #include <boost/regex.hpp> int main(int argc, char* argv[]) { return 0; } The error reported is as follows: regbase.hpp(120) : error C2955: 'std::collate' : use of class template requires template argument list The offending line of code is: collate = ::boost::regbase::collate, which is one member of an enumeration. The code looks fine to me so this seems to be a problem with the compiler. Has anyone already dealt with this? Thanks, John

1 0

RE: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C:
by Dernoncourt, Wayne CTR NAVAIR 3184, ,10 05 Feb '04

05 Feb '04

(I've been using MS Outlook for years and I still don't like the way it handles quoting like this!) Please pardon the newbieness, these are probably elmentary questions. It turns out the copy of Boost I have didn't have a bjam.exe (I don't know why) so I had to puzzle out how to build that (bad path, etc.) Now trying to figure out how to get Boost to build - done sort of. I don't see how this is going to examine the conflicts with the subset of RogueWave being used by the third party SDK. According to the results from the command "bjam" being executed in the D:\boost-1.30.2 directory: - failed updating 660 targets - skipped 234 targets - updated 260 targets (the actual number has scrolled off screen...) Looking back through the screens, there seem to be CALL "C:\Program Files\Microsoft\Visual Studio...", well that isn't right, it lives on D:, not C:. An earlier email suggested an S setting, so I tried: bjam "VC6_ROOT=D:\Progra~1\Micros~1" and it complains about not having Python (well, it hasn't been installed, we don't need it for this project, though it seems to be very popular) and then it complains about not knowning how to make VC6_ROOT=D:\same stuff. ...found 1 target ...can't find 1 target and it quits. -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org]On Behalf Of Administrator Sent: Wednesday, February 04, 2004 14:54 To: 'Boost Users mailing list' Subject: RE: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C: Wayne, What configure script? Boost requires bjam.exe. If you follow the directions here: http://www.boost.org/more/getting_started.html you should have no problems. I have never had a problem with either MS Visual C++ 6.0 with regards to bjam, nor have I ever used a configure script with Boost. Cygwin is an alternative, but you shouldn't need it if you follow the getting started directions. Dale -----Original Message----- From: Dernoncourt, Wayne CTR NAVAIR 3184, ,10 [mailto:wayne.dernoncourt@navy.mil] Sent: Wednesday, February 04, 2004 9:17 AM To: Boost Users mailing list Subject: [Boost-users] configuring boost on MS Visual Studio 6 where the installation drive isn't C: For a number of reasons we don't have MS Visual Studio installed on the C: drive. We also have another SDK installed that uses part of Rogue Wave. Both libraries try to define min, max and a reverse iterator (there are items, those are the ones we've come across in an afternoon of experimentation). As I understand things, the ./configure script will look for conflicts with other libraries and try to work around them. The ./configure script is a bourne shell script, but there is no obvious way of running that script in Windows. One approach I thought of was to install cygwin to run the script, but that would have to invoke the MS C++ compiler (invoking a Windows based tool from inside of a Linux like environment), I'm not sure that would actually work. Are there alternatives that need to be explored? Would the cygwin approach actually work? (we are currently using MS Visual Studio 6 because of requirement of the other SDK) _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

1 0

Boost release 1.31.0 is available
by Beman Dawes 05 Feb '04

05 Feb '04

Boost release 1.31.0 is available. See the www.boost.org home page for latest news about what's in the release. Or go right to http://sourceforge.net/project/showfiles.php?group_id=7586 to download. Thanks to everyone who helped with this release. The folks that run the regression tests and review the release candidates get a special pat on the back. Due to compiler updates, three shipping and one soon-to-ship C++ compiler now pass almost all of Boost's regression tests. A year ago, no compilers could do that. --Beman

3 3

Problems with boost build with latest CVS head.
by Jeff Holle 05 Feb '04

05 Feb '04

I updated my CVS head of boost at Wed Feb 4 13:17:44 PST 2004. I am using gcc version 3.3. I've run into 2 types of problems which I have not experienced before. 1. There is some diff trible in boost/tools/build/v1/gcc-tools.jam starting at line 61. I solved it by commenting out three lines. 2. Compiler errors with boost/libs/date_time/src/gregorian/greg_month.cpp at line 18. Since I'm not using this part of boost, I haven't bothered fixing it. An example of the errors is: /boost/boost/date_time/date_parsing.hpp: In function ` date_type boost::date_time::parse_date(const std::string&, int)': /boost/boost/date_time/date_parsing.hpp:100: error: parse error before `>' token

3 3

Rationale on explicit shared_ptr constructor
by Aaron W. LaFramboise 05 Feb '04

05 Feb '04

Hi, (I can't beleive this wouldn't have been discussed already, but I haven't been able to find an answer in my searches [Google's search results into boost's web maillist seem to be incoherent.].) I recently converted a portion of a medium-sized project from loki::Smart_Ptr to boost::shared_ptr (primarily for weak_ptr support), and almost everything worked out of the box, except: boost: template<class Y> explicit shared_ptr <#constructors>(Y * p); loki: SmartPtr(const StoredType& p) In other words, code like this stopped working: some_smart_ptr<int> my_function() { return new int; // error: conversion from `int*' to non-scalar type `boost::shared_ptr<int>' // requested } Even when I adopt the convention to convert the return value to the smart pointer type such as with "return some_smart_ptr<int>(new int)", returning a null pointer as 'zero' doesn't work: some_smart_ptr<int> my_function() { return some_smart_ptr<int>(0); // error: no matching function for call to // `boost::shared_ptr<int>::shared_ptr(int)' } I've worked around this by simply using "return some_smart_ptr<int>();". However, I feel somewhat strongly that this sort of usage is unnecessarily ugly, and confuses the meaning of the code unnecessarily. More importantly, it causes smart pointers to behave differently from ordinary pointers, which is undesirable, as it requires the user (who may not know or care anything about the smart pointer, or even know that it is one, depending on a module's implementation and documentation) to have to learn and use and debug additional semantics. So my question follows. I understand that there are very good reasons for disallowing automatic conversion from a smart pointer, but why disallow automatic conversion to the smart pointer type also? If there are strong reasons for this, would it be reasonable to document this somewhere in the shared_ptr documentation? If not, is this particular aspect of shared_ptr possibly subject to discussion or change in the future? Thank you for your time, Aaron W. LaFramboise

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