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glog - google logging library
by Neal Becker 27 Aug '10

27 Aug '10

Just noticed this. Interesting design. http://google-glog.googlecode.com/svn/trunk/doc/glog.html

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[python] boost 1.44 using python 3.1.2 build problem
by Christopher Lux 27 Aug '10

27 Aug '10

Hi, i am under the impression boost.python supported python 3 for a while now. But trying to compile it using python 3.1.2 gives me the old errors: .\boost/python/converter/builtin_converters.hpp(138) : error C2039: 'PyInt_FromLong' : is not a member of '`global namespace'' .\boost/python/converter/builtin_converters.hpp(138) : error C3861: 'PyInt_FromLong': identifier not found .\boost/python/converter/builtin_converters.hpp(138) : error C2065: 'PyInt_Type' : undeclared identifier .\boost/python/converter/builtin_converters.hpp(138) : error C2039: 'PyInt_FromLong' : is not a member of '`global namespace'' .\boost/python/converter/builtin_converters.hpp(138) : error C3861: 'PyInt_FromLong': identifier not found .\boost/python/converter/builtin_converters.hpp(138) : error C2065: 'PyInt_Type' : undeclared identifier .\boost/python/converter/builtin_converters.hpp(138) : error C2039: 'PyInt_FromLong' : is not a member of '`global namespace'' .\boost/python/converter/builtin_converters.hpp(138) : error C3861: 'PyInt_FromLong': identifier not found .\boost/python/converter/builtin_converters.hpp(144) : error C2039: 'PyInt_FromLong' : is not a member of '`global namespace'' .\boost/python/converter/builtin_converters.hpp(144) : error C3861: 'PyInt_FromLong': identifier not found .\boost/python/converter/builtin_converters.hpp(144) : error C2065: 'PyInt_Type' : undeclared identifier .\boost/python/converter/builtin_converters.hpp(144) : error C2039: 'PyInt_FromLong' : is not a member of '`global namespace'' .\boost/python/converter/builtin_converters.hpp(144) : error C3861: 'PyInt_FromLong': identifier not found .\boost/python/converter/builtin_converters.hpp(144) : error C2065: 'PyInt_Type' : undeclared identifier .\boost/python/converter/builtin_converters.hpp(144) : error C2039: 'PyInt_FromLong' : is not a member of '`global namespace'' .\boost/python/converter/builtin_converters.hpp(144) : error C3861: 'PyInt_FromLong': identifier not found my user-config.jam: using python : 3.1 : "C:\\Program Files\\python31\\python" : "C:\\Program Files\\python31\\include" : "C:\\Program Files\\python31\\libs" : #condition : #ext suffix ; Regards -chris

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Re: [boost] Generic lazy loader library interest
by John Bellone 27 Aug '10

27 Aug '10

Hey Dave, It is not a code loader (or class loader) in the sense of Java. This is a design pattern which delays execution (allocation) until the object is first needed. Wikipedia would have a much better explanation than I could ( http://en.wikipedia.org/wiki/Lazy_loading) I currently have a example up on my Github repository, but there is still work to be done to make it better so I figured I'd put the feelers out to see if there is interest. I have a post regarding it on my blog (http://thoughtlessbanter.com/) and I'll include a snippet from the example. class Unique{public: Unique() : m_uuid(boost::uuids::random_generator()()) { } Unique(const boost::uuids::uuid& u) : m_uuid(u) { } const boost::uuids::uuid& uuid() { return m_uuid; }private: boost::uuids::uuid m_uuid;}; static void factory(boost::shared_ptr<Unique>& impl){ impl = boost::shared_ptr<Unique>( new Unique(boost::uuids::nil_uuid()) );} int main(int argc, char* argv[]){ thunk::lazy_loader<Unique> loader(&factory); const boost::uuids::uuid& u = loader->uuid(); std::cout<<"uuid: "<<boost::lexical_cast<std::string>(u)<<std::endl; return 0;} Thanks, jb

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[Filesystem] problems with g++ -std=c++0x
by Roland Bock 26 Aug '10

26 Aug '10

Hi, getting my feet wet with variadic templates, I switched on c++0x support in gcc. Unfortunately, I am experiencing a linker error for the following minimal program: ------------------ #define BOOST_FILESYSTEM_VERSION 3 #define BOOST_FILESYSTEM_NO_DEPRECATED #include <boost/filesystem.hpp> int main() { boost::filesystem::copy_file("a", "b"); } ------------------ rbock@rbock:~/temp/test$ g++ File.cpp -std=c++0x -I boost/1.44/include -L boost/1.44/lib -l boost_filesystem -l boost_system /tmp/ccwkcQpq.o: In function `boost::filesystem3::copy_file(boost::filesystem3::path const&, boost::filesystem3::path const&)': File.cpp:(.text._ZN5boost11filesystem39copy_fileERKNS0_4pathES3_[boost::filesystem3::copy_file(boost::filesystem3::path const&, boost::filesystem3::path const&)]+0x2a): undefined reference to `boost::filesystem3::detail::copy_file(boost::filesystem3::path const&, boost::filesystem3::path const&, boost::filesystem3::copy_option, boost::system::error_code*)' collect2: ld returned 1 exit status Experienced on Ubuntu-10.4, 64bit, gcc (Ubuntu 4.4.3-4ubuntu5) 4.4.3 Other boost libraries seem to work fine, other functions within Boost.Filesystem work fine, too. When I rebuild boost with -std=c++0x, then the linking problem is gone, but I experience crashes in the boost::thread constructor :-( Any ideas? Thanks and regards, Roland

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Re: [boost] [msm] Async transition
by Christophe Henry 26 Aug '10

26 Aug '10

Hi, > from what I understand of Meta-State-Machine library documentation, > the state transitions are performed immediately when events are > processed. - right? Right. > So my (maybe very dumb) question is : is there cases where the > state-machine will perform state transitions in an asynchronous way? No, transitions are performed when an event is fired. What are you trying to achieve? Regards, Christophe

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ptr_container] 1.44 compile error in serialization
by Jan Boehme 26 Aug '10

26 Aug '10

Hi, a compile error (gcc used) occurs if a ptr_container should be serialized: boost/ptr_container/detail/serialize_reversible_cont.hpp:28: error: ‘make_nvp’ is not a member of ‘boost::serialization’ A patch to fix this is attached. Bye, Jan.

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[msm] Async transition
by Klaim 26 Aug '10

26 Aug '10

Hi, from what I understand of Meta-State-Machine library documentation, the state transitions are performed immediately when events are processed. - right? So my (maybe very dumb) question is : is there cases where the state-machine will perform state transitions in an asynchronous way? Thanks, Joël Lamotte

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[algorithm][string] gcc unused parameter warning
by Jürgen Hunold 25 Aug '10

25 Aug '10

Hi, compiling code using Boost.Unit results in an unused parameter in algorithm/string/detail/find_format_store.hp with gcc and -Wall -Wextra enabled. Okay to commit the attached patch ? Yours, Jürgen -- * Dipl.-Math. Jürgen Hunold ! Ingenieurgesellschaft für * voice: ++49 511 262926 57 ! Verkehrs- und Eisenbahnwesen mbH * fax : ++49 511 262926 99 ! Lister Straße 15 * juergen.hunold(a)ivembh.de ! www.ivembh.de * * Geschäftsführer: ! Sitz des Unternehmens: Hannover * Prof. Dr.-Ing. Thomas Siefer ! Amtsgericht Hannover, HRB 56965 * PD Dr.-Ing. Alfons Radtke !

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[format] old-style cast warning
by Jürgen Hunold 25 Aug '10

25 Aug '10

Hi, I'm using Boost.Format with gcc "-Wold-style-cast" enabled. This issued a warning in format/feed_args.hpp. Okay to commit the attached patch ? Yours, Jürgen -- * Dipl.-Math. Jürgen Hunold ! Ingenieurgesellschaft für * voice: ++49 511 262926 57 ! Verkehrs- und Eisenbahnwesen mbH * fax : ++49 511 262926 99 ! Lister Straße 15 * juergen.hunold(a)ivembh.de ! www.ivembh.de * * Geschäftsführer: ! Sitz des Unternehmens: Hannover * Prof. Dr.-Ing. Thomas Siefer ! Amtsgericht Hannover, HRB 56965 * PD Dr.-Ing. Alfons Radtke !

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Re: [boost] [1.44] [filesystem] operator +
by Jochen Wilhelmy 25 Aug '10

25 Aug '10

> > Sometimes I have file formats that have two parts, e.g. a description xml > > file > > and a data file. then I'd like to do name + ".xml" and name + ".dat" if name > > is > > a fs::path >path p1 = "foo/bar.xml"; >path p2 = path(p1).replace_extension(".dat"); path p = "foo/bar"; path p1 = p + ".xml";-) path p2 = path(p1).replace_extension(".dat");

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