June 2005 - Boost-users - lists.preview.boost.org

bind problems
by Jason 27 Jun '05

27 Jun '05

I'm trying to use bind with boost.thread in order to make a thread of a class member function with an input argument, but I can't get it to compile. To narrow the problem, I went to the bounded_buffer.cpp program in the libs/thread/tutorial dir. I added an int arg to sender, and then changed boost::thread thrd1(&sender); to int x = 99; boost::thread thrd1(boost::bind<void>(&sender, _1)(x)); and several other combinations including removal of <void>. In the above case, gcc results in /mnt/shared/Projects/boosttest/src/bounded_buffer.cpp:77: error: call of overloaded `bind(void (*)(int), boost::arg<1>&)' is ambiguous /usr/include/boost/bind.hpp:1132: note: candidates are: boost::_bi::bind_t<R, F, typename boost::_bi::list_av_1<A1>::type> boost::bind(F, A1) [with R = void, F = void (*)(int), A1 = boost::arg<1>] I got this syntax from the bind doc (http://www.boost.org/libs/bind/bind.html) What am I doing wrong? thanks, Jason

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String algorithm
by Sliwa, Przemyslaw (London) 26 Jun '05

26 Jun '05

Hi, I would like to use the string algorithm library in my project. Including #include <boost/algorithm/string.hpp> in the source file gives the following error on Windows XP, VC++ 6 SP5. Can anyone help me? Thanks a lot in advance. Pshemek c:\vendor_libs\include\boost/algorithm/string/yes_no_type.hpp(22) : error C2265: '<Unknown>' : reference to a zero-sized array is illegal c:\vendor_libs\include\boost/algorithm/string/yes_no_type.hpp(23) : see reference to class template instantiation 'boost::algorithm::size_descriptor<I>' being compiled c:\vendor_libs\include\boost/mpl/bool.hpp(37) : fatal error C1506: unrecoverable block scoping error Error executing cl.exe. Kind regards Przemyslaw Sliwa (0044) 20788-65014 GFX Development -------------------------------------------------------- If you are not an intended recipient of this e-mail, please notify the sender, delete it and do not read, act upon, print, disclose, copy, retain or redistribute it. Click here for important additional terms relating to this e-mail. http://www.ml.com/email_terms/ --------------------------------------------------------

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How do I get boost to work with vs.net 2005 ?
by Mart marvin 25 Jun '05

25 Jun '05

I downloaded the executable from sourceforge, but I'm at a loss how to get the libraries to be recognized by VS.NET. I googled but nothing that works turned up. I'm desperate to try and play with the boost libraries and am eager to get started with them. Can someone describe it step by step command by command? I'm on Win2k Pro. Thanks in advance. _________________________________________________________________ On the road to retirement? Check out MSN Life Events for advice on how to get there! http://lifeevents.msn.com/category.aspx?cid=Retirement

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Re: [Boost-users] How do I get boost to work with vs.net 2005 ?
by Brian Braatz 24 Jun '05

24 Jun '05

I believe I can help. Lets say you have downloaded boost to the dir: C:\boost now if you CD into that dir- you will get something like the following files: 06/10/2005 10:50 AM <DIR> . 06/10/2005 10:50 AM <DIR> .. 05/26/2005 01:48 AM <DIR> bin 06/16/2005 02:27 PM <DIR> boost 02/04/2005 04:09 PM 499 boost-build.jam 02/04/2005 04:09 PM 675 boost.css 02/04/2005 04:09 PM 6,897 boost.png 02/21/2005 11:10 AM <DIR> CVS 02/18/2005 03:46 PM <DIR> doc 02/04/2005 04:09 PM 3,558 google_logo_40wht.png 02/04/2005 04:09 PM 49,603 index.htm 02/04/2005 04:09 PM 9,406 Jamfile 02/04/2005 04:09 PM 882 Jamfile.v2 02/04/2005 04:09 PM 450 Jamrules 05/26/2005 01:04 AM <DIR> libs 02/04/2005 04:09 PM 1,361 LICENSE_1_0.txt 02/18/2005 03:47 PM <DIR> more 02/18/2005 03:47 PM <DIR> people (abbreviated) Now using my example dirs- some important dirs to be aware of: C:\boost\boost - the libraries themselves are here C:\boost\libs - look here for the documentation (html) files for a given library since the libs are in c:\boost you need to do the following: visual studio- (menu) view-solution explorer then in the solution explorer, right click on the project name select "Properties" from the menu click on the "C\C++" select on the left click on the "General" item below this on the right you will see "Additional Include Directories" type in (in our case above) C:\boost the cute thing about this is (recall there is a boost dir below C:\boost) you can now do a #include with the sub dir of boost in the string i.e. #include <boost/smart_ptr.hpp> You can TEST if the "Additional Included Directories" setting is CORRECT- by doing the following: (set the setting as described above) move your cursor over #include <boost/smart_ptr.hpp> right click- on that menu select "Open Document <boost/smart_ptr.hpp>" IF that succeeds, then you have setup the #include directories correctly- if not then you put the wrong value in "Additional Included Directories" HOPE THAT HELPS Brian :) > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org [mailto:boost-users- > bounces(a)lists.boost.org] On Behalf Of Mart marvin > Sent: Friday, June 24, 2005 3:13 PM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] How do I get boost to work with vs.net 2005 ? > > It didn't work! > > I followed the directions to the letter. Is it a bug with VS.NET 2005 > beta? > Here's the message I got: > > Cannot open include file: 'boost\smart_ptr.h': No such file or directory > > Here is my code: > > #include "stdafx.h" > #include "x.h" > #include <boost\smart_ptr.h> > > int main() > { > x& p = *new x; > delete &p; > return 0; > } > > Please help... I'm desperate to try Boost. Looked at the documentation > and > I'm drooling to play with it. > > >From: "Pablo Aguilar" <pablo.aguilar(a)gmail.com> > >Reply-To: boost-users(a)lists.boost.org > >To: boost-users(a)lists.boost.org > >Subject: Re: [Boost-users] How do I get boost to work with vs.net 2005 ? > >Date: Fri, 24 Jun 2005 14:10:36 -0700 > > > >Open VS.NET > > >From the "Tools" menu, select "Options" > >In the tree to the left, open "Projects & Solutions" and select VC++ > >Directories > > >From the drop down list labelled "Show directories for:" select > "Include > >files" > >Add the boost root directory (wherever you decompressed the boost > >installation) to that list. > > > >HTH > > > > > >Pablo > > > > >I downloaded the executable from sourceforge, but I'm at a loss how to > >get > > > the libraries to be recognized by VS.NET. I googled but nothing that > > > works > > > turned up. I'm desperate to try and play with the boost libraries > and > >am > > > eager to get started with them. Can someone describe it step by step > > > command by command? > > > > > > I'm on Win2k Pro. > > > > > > Thanks in advance. > > > > > > > >_______________________________________________ > >Boost-users mailing list > >Boost-users(a)lists.boost.org > >http://lists.boost.org/mailman/listinfo.cgi/boost-users > > _________________________________________________________________ > Is your PC infected? Get a FREE online computer virus scan from McAfee(r) > Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 >

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Re: [Boost-users] How do I get boost to work with vs.net 2005 ?
by Sohail Somani 24 Jun '05

24 Jun '05

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Mart marvin > Sent: Friday, June 24, 2005 12:20 PM > To: boost-users(a)lists.boost.org > Subject: [Boost-users] How do I get boost to work with vs.net 2005 ? > > > I downloaded the executable from sourceforge, but I'm at a > loss how to get > the libraries to be recognized by VS.NET. I googled but > nothing that works > turned up. I'm desperate to try and play with the boost > libraries and am > eager to get started with them. Can someone describe it step by step > command by command? http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?Installin gBoost Doesn't get much better than that.

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Re: [Boost-users] Boost-users Digest, Vol 588, Issue 2
by Frank Hess 24 Jun '05

24 Jun '05

On Thursday 23 June 2005 05:41 pm, boost-users-request(a)lists.boost.org wrote: > Message: 9 > Date: Thu, 23 Jun 2005 17:45:25 +0100 > From: Paul Johnson <gt54-boost(a)cyconix.com> > Subject: [Boost-users] Replacing a reference with a shared_ptr? > To: boost-users(a)lists.boost.org > Message-ID: <42BAE725.2080907(a)cyconix.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > I'm deriving from a base class in a library I use (in other words, I > > can't change it), and this class declares: > > virtual string& getFilename(void) const; > > virtual void setFilename(const string&); > > The base class itself doesn't declare a member to store the file name; > it just ignores 'setFilename', and returns an empty string for > 'getFilename'. > > I'd like to implement these routines, but I don't want to have a string > reference in my derived class. If possible, I'd like to use a > shared_ptr<string>. However, I can't see a simple way to do this. Why are you bothering with pointers or references? Why can't you just put a string in your class? string myString; virtual string& getFilename(void) const {return myString;} virtual void setFilename(const string&) {myString = string;} -- Frank

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shared_ptr misuse?
by Jason House 23 Jun '05

23 Jun '05

I have the contents of a shared pointer getting corrupted by a default constructor of another object. My best guess as to how this could be happening is that I am using references to shared pointers for coding convenience. Is it possible for code like the following to cause a problem? { boost::shared_ptr<my_class> &x = a.b.c.d.e.f.g; if (x.get() == NULL) { pointer_empty(); } else { other_actions(x->get()); } } PS: I found this in a header file (#define BOOST_VERSION 103000)

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Replacing a reference with a shared_ptr?
by Paul Johnson 23 Jun '05

23 Jun '05

I'm deriving from a base class in a library I use (in other words, I can't change it), and this class declares: > virtual string& getFilename(void) const; > virtual void setFilename(const string&); The base class itself doesn't declare a member to store the file name; it just ignores 'setFilename', and returns an empty string for 'getFilename'. I'd like to implement these routines, but I don't want to have a string reference in my derived class. If possible, I'd like to use a shared_ptr<string>. However, I can't see a simple way to do this. The original string is supplied by me to the library, which eventually calls my 'setFilename'. So, I could start with a shared_ptr, and use operator() to supply the library with a reference to the string. However, when the string& gets back to my 'setFilename', there's no obvious way to get back to the original shared_ptr. Have I missed something? Is there a clean way to implement this with shared_ptr<string>? Thanks.

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python like generators in C++
by Paul Elliott 23 Jun '05

23 Jun '05

I consider the following equation: Threads + some template code = iterators that act like python generators in C++! Has anyone implemented this in boost? Thank You -- Paul Elliott 1(512)837-1096 pelliott(a)io.com PMB 181, 11900 Metric Blvd Suite J http://www.io.com/~pelliott/pme/ Austin TX 78758-3117

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1.32 installation: where is the smart_ptr lib?
by Paul Johnson 23 Jun '05

23 Jun '05

Sorry for the dumb question... Just installed boost following the instructions on boost.org, and I can't find the smart_ptr library. I downloaded the 1.32 .bz file, and bjam, and installed on Linux/RHEL4. I've now got 189 boost libraries in /usr/local/lib, and 32 in /usr/lib. However, the only base libraries seem to be date_time, filesystem, prg_exec_monitor, program_options, python, regex, serialisation, signals, test_exec_monitor, thread, unit_test_framework, and wserialisation, some of which aren't even listed on the libraries page at boost.org. Where's smart_ptr? None of these libraries appear to have it. The smart_ptr headers are in /usr/local/include/boost-1_32/boost, as expected (but why 2 levels down? Surely I'm not expected to #include <boost-1_32/boost/xx.hpp??) Cheers.

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