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[Bind] bind to member functions
by Rutger ter Borg 26 Jan '09

26 Jan '09

Hello, this works fine, struct A { template< typename X > void f( bool ) { bind(&A::f<X>, this, _1)( true ); } }; whereas template< typename Z > struct A { template< typename X > void f( bool ) { bind(&A<Z>::f<X>, this, _1)( true ); } }; gives me trouble in the at the line of bind form of "expected primary-expression before ‘>’ token". I've tried numerous typedefs, but that didn't do the trick. Many thanks in advance for help on this, Rutger

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[serialization] Creating temporary archive objects
by Robert Dailey 26 Jan '09

26 Jan '09

Hi, What would be a good technique to deserialize an object without using 2-phase initialization? In other words, I want to avoid first default constructing the object and *then* streaming it out of the archive object. I was thinking of a factory for this but a good code example would help a great deal since I'm not extremely familiar with Boost.Serialization. I was looking through the Boost.Serialization documentation but I was unable to find information on this. Help is greatly appreciated!

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[Smart Ptr] explicit checked_delete specialization ?
by Alexander 26 Jan '09

26 Jan '09

Is this OK to specialize boost::checked_delete to control deletion with scoped_ptr ? Or to specialize some boost::scoped_ptr members for the same purpose ?

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how to get available disk space value via boost?
by boost001 26 Jan '09

26 Jan '09

I want to get free disk space via boost. How can I do it? thanks -- View this message in context: http://www.nabble.com/how-to-get-available-disk-space-value-via-boost--tp21… Sent from the Boost - Users mailing list archive at Nabble.com.

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asio multicast cross-platform issues
by Birju Prajapati 26 Jan '09

26 Jan '09

Hi, On WinXP, I successfully implemented an application that listens to multiple multicast groups (different IPs same port). When I recompiled that app on Linux, on another box, I started getting duplicate datagrams. After messing around for a long while, I got it working. I had to change two things: socket.bind was changed so that it no longer was given 'any' and the port, but the multicast address and port. socket.set_option was changed so that it no longer was given only the multicast address, but both the multicast address and local address. Moving this code back to Windows stops it working! I then stumbled across this while researching my issue: http://osdir.com/ml/lib.boost.asio.user/2007-04/msg00135.html I could not find this information anywhere in the documentation. Could someone point me in the right place? Does it also mean that the statement "Boost.Asio is a cross-platform C++ library for network and low-level I/O programming that provides developers with a consistent asynchronous model using a modern C++ approach." In the docs is inaccurate for multicast? If not, is there a cross-platform, asio way? Cheers, Birju Schneider Trading 4th Floor, 25 Copthall Avenue London EC2R 7BP -------------------------------------------------------- Message from: Birju.Prajapati(a)schneidertrading.com Message to: boost-users(a)lists.boost.org Attached files: 0 This e-mail and any files transmitted with it are confidential, may be legally privileged, and are for the sole use of the intended recipient. Copyright in this e-mail and any accompanying document created by us is owned by us. If you are not the intended recipient of this e-mail or any part of it please telephone our IT Department at the number shown above or by e-mail at info(a)schneidertrading.com. You should not use or disclose to any other person the contents of this e-mail or its attachments (if any), nor take copies. This e-mail is not a representation or warranty and is not intended nor should it be taken to create any legal relations, contractual or otherwise. Schneider Trading Associates Ltd (Registration No. 3692131) is incorporated in England and Wales and the registered office is at 25 Copthall Avenue, London EC2R 7BP. The company is authorised and regulated by the Financial Services Authority

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Re: [Boost-users] Using different compilers with boost
by Dan Smithers 26 Jan '09

26 Jan '09

>> I need to use several compilers for my project for different target >> computers. I have built boost 1.37 for gcc 4.1.2 and 3.4.3 and >> everything seems to be nicely set up as >> <boost_dir>/lib/libboost_xxx-gcc34-mt-1_37.so and >> <boost_dir>/lib/libboost_xxx-gcc41-mt-1_37.so. >> >> Is there anyway of automatically detecting which version to link? I >> suppose that gcc --version and some sort of awk script could do this. >> > > gcc -dumpversion is more useful for automated processing. > > For example, > gcc -dumpversion | perl -p -e > 's/(\d)\.(\d)\.\d/-lboost_xxx-gcc$1$2-mt-1_37/' Thanks Steven, just what I was looking for. dan

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Re: [Boost-users] Fwd: Newbie: Eclipse and Boost
by raindog＠macrohmasheen.com 26 Jan '09

26 Jan '09

Based on your eloquent description I'm guessing you're running ms-dos 6.5 and have eclipse 0.5 beta installed in text mode. Perhaps the situation is different, in which case I would need correcting. ------Original Message------ From: n0b0dy-at-home Sender: boost-users-bounces(a)lists.boost.org To: boost-users(a)lists.boost.org ReplyTo: boost-users(a)lists.boost.org Sent: Jan 25, 2009 4:25 AM Subject: [Boost-users] Fwd: Newbie: Eclipse and Boost Hiya, i'm about to make my first steps with boost... unfortunately eclipse says "boost/shared_ptr.hpp: No such file or directory"; i've included the boost-path, so what's my mistake? Greetings n0b0dy@home _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users Sent from my Verizon Wireless BlackBerry

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[program options] No value option in config file not allowed.
by Rodolfo Federico Gamarra 26 Jan '09

26 Jan '09

Hi all! I'm using parse_config_file to read my options from a file. Some of them are only a flag (ie no value given), like -z (--gzip), -h (--help) or -v (--verbose). What I see is that those options can be specified with the file only if some dummy value is given. For concreteness, let's say that the option is gzip. If I put gzip= the result is "Error: no value given in 'gzip='". If the = isn't put, then the message is "Error: unrecognized line in 'gzip'". Using spaces doesn't help because they are trimmed away. The method common_config_file_iterator::get() (config_file.cpp) seems to be involved: else if ((n = s.find('=')) != string::npos) { string name = m_prefix + trim_ws(s.substr(0, n)); string value = trim_ws(s.substr(n+1)); if (!allowed_option(name)) boost::throw_exception(unknown_option(name)); //// Doesn't allow empty values for an option. if (value.empty()) boost::throw_exception(invalid_syntax(s, "no value given")); found = true; this->value().string_key = name; this->value().value.clear(); this->value().value.push_back(value); break; } else { boost::throw_exception(invalid_syntax(s, "unrecognized line")); } The trimming may be handy, but it seems useful to allow empty values; on the other hand, it seems that whether an empty value is legal or not should be checked on a higher level. Thanks a lot. -- Rodolfo Federico Gamarra

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[ublas] warning on VC9 about checked iterators
by Peter Barker 25 Jan '09

25 Jan '09

Hello, Using Boost 1.37.0, I compile the following program under VC9 (VS .NET 2008 Express Edition): #include <boost/numeric/ublas/vector.hpp> class Host { public: Host(const boost::numeric::ublas::bounded_vector<double,3>& normal) : normal_(normal) {} private: boost::numeric::ublas::bounded_vector<double,3> normal_; }; int main() { return 0; } and I get the following warning: 1>c:\boost\boost_1_37_0\boost\numeric\ublas\storage.hpp(337) : warning C4996: 'std::copy': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators' 1> c:\program files\microsoft visual studio 9.0\vc\include\xutility(2576) : see declaration of 'std::copy' 1> c:\boost\boost_1_37_0\boost\numeric\ublas\storage.hpp(334) : while compiling class template member function 'boost::numeric::ublas::bounded_array<T,N>::bounded_array(const boost::numeric::ublas::bounded_array<T,N> &)' 1> with 1> [ 1> T=double, 1> N=3 1> ] 1> c:\boost\boost_1_37_0\boost\numeric\ublas\vector.hpp(36) : see reference to class template instantiation 'boost::numeric::ublas::bounded_array<T,N>' being compiled 1> with 1> [ 1> T=double, 1> N=3 1> ] 1> c:\boost\boost_1_37_0\boost\numeric\ublas\vector.hpp(524) : see reference to class template instantiation 'boost::numeric::ublas::vector<T,A>' being compiled 1> with 1> [ 1> T=double, 1> A=boost::numeric::ublas::bounded_array<double,3> 1> ] 1> c:\newsystem\readdisplaystlascii\readdisplaystlascii\main.cpp(10) : see reference to class template instantiation 'boost::numeric::ublas::bounded_vector<T,N>' being compiled 1> with 1> [ 1> T=double, 1> N=3 1> ] Should I compile with -D_SCL_SECURE_NO_WARNINGS? Is there a fix coming for ublas? What do others do? Regards, Pete

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Fwd: Newbie: Eclipse and Boost
by n0b0dy-at-home 25 Jan '09

25 Jan '09

Hiya, i'm about to make my first steps with boost... unfortunately eclipse says "boost/shared_ptr.hpp: No such file or directory"; i've included the boost-path, so what's my mistake? Greetings n0b0dy@home

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