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Newbie problems resolving header paths
by DC 18 Nov '06

18 Nov '06

I downloaded 1_33_1 and it built and installed. Actually, I'm still not sure what is meant by "install" in the docs. Does something happen than copying a bunch of files to C:\Boost ? VC71 is having trouble resolving paths to the headers. I have: In the project properties, Additional Include Directories: C:\Boost\include\boost-1_33_1; In my .cpp file, I use, for example: #include <boost/date_time/gregorian/gregorian.hpp> I still get: C:\Dev\VS2003\MyProject\Engine.h(3): fatal error C1083: Cannot open include file: 'boost/date_time/gregorian/gregorian.hpp': No such file or directory Hoping I'm overlooking something simple here. Thanks! - JC

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BGL: Bundled Properties in subgraphs
by Greg Reynolds 18 Nov '06

18 Nov '06

Hi, I am trying to use the subgraph class with bundled propeties and wonder if it is still broken? I found a message on the list saying that it was broken in March 2005, but would probably be fixed shortly. I include my code below. It compiles cleanly if I don't use subgraph, i.e. just declare the adjacency_list. It also works if use the internal properties method. Thanks, Greg // ... appropriate headers using namespace std; using namespace boost; typedef unsigned long int uvid; struct VertexProperty { uvid gmr_number; vector<string> labels; }; struct EdgeProperty { std::size_t biconnected_component; vector<string> labels; }; typedef adjacency_list<setS, vecS, undirectedS, VertexProperty, EdgeProperty> GraphPlain; typedef subgraph< GraphPlain > Graph; int main(int argc, char* argv[]) { GraphPlain g1; Graph g; return 0; }

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[Python] Wrapping a base class' method
by bernhard.maeder＠zkb.ch 17 Nov '06

17 Nov '06

Hi Boosters I'm trying to export some base class' methods with the derived class directly. See the following code: // ----------------------------------------------------- #include <boost/python.hpp> struct my_base_class { int const & get_base_i() const { return i_; } int i_; }; struct my_class : my_base_class { int const & get_i() const { return i_; } int i_; }; using namespace boost::python; BOOST_PYTHON_MODULE(_test) { class_<my_class>("MyClass") .add_property("i", make_function(&my_class::get_i, return_value_policy<copy_const_reference>())) .add_property("basei", make_function(&my_class::get_base_i, return_value_policy<copy_const_reference>())) ; } // ----------------------------------------------------- Now python throws the following at me: h[ 1] >>> from _test import * h[ 1] >>> MyClass().basei Traceback (most recent call last): File "<stdin>", line 1, in ? Boost.Python.ArgumentError: Python argument types in None.None(MyClass) did not match C++ signature: None(my_base_class {lvalue}) So, my question is: Am I not supposed to do this at all? The same seems to work flawlessly when returning by value instead of by reference.... Thanks for your input Bernhard ___________________________________________________________________ Disclaimer: Diese Mitteilung ist nur fuer die Empfaengerin / den Empfaenger bestimmt. Fuer den Fall, dass sie von nichtberechtigten Personen empfangen wird, bitten wir diese hoeflich, die Mitteilung an die ZKB zurueckzusenden und anschliessend die Mitteilung mit allen Anhaengen sowie allfaellige Kopien zu vernichten bzw. zu loeschen. Der Gebrauch der Information ist verboten. This message is intended only for the named recipient and may contain confidential or privileged information. If you have received it in error, please advise the sender by return e-mail and delete this message and any attachments. Any unauthorised use or dissemination of this information is strictly prohibited.

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[ptr_container] linker error
by Mark Snelling 17 Nov '06

17 Nov '06

Hi, I'm having trouble using the boost::ptr_container library. I seem to get this linker error with the code below under MSVC8. error LNK2001: unresolved external symbol "public: __thiscall boost::ptr_container_detail::static_move_ptr<struct Test,struct boost::ptr_container_detail::clone_deleter<struct boost::ptr_container_detail::reversible_ptr_container<struct boost::ptr_container_detail::sequence_config<struct Test,class std::list<void *,class std::allocator<void *> > >,struct boost::heap_clone_allocator>::null_clone_allocator<0> > >::static_move_ptr<struct Test,struct boost::ptr_container_detail::clone_deleter<struct boost::ptr_container_detail::reversible_ptr_container<struct boost::ptr_container_detail::sequence_config<struct Test,class std::list<void *,class std::allocator<void *> > >,struct boost::heap_clone_allocator>::null_clone_allocator<0> > >(class boost::ptr_container_detail::static_move_ptr<struct Test,struct boost::ptr_container_detail::clone_deleter<struct boost::ptr_container_detail::reversible_ptr_container<struct boost::ptr_container_detail::sequence_config<struct Test,class std::list<void *,class std::allocator<void *> > >,struct boost::heap_clone_allocator>::null_clone_allocator<0> > > &)" (??0?$static_move_ptr@UTest@@U?$clone_deleter@U ?$null_clone_allocator@$0A@@?$reversible_ptr_container@ U?$sequence_config@UTest@@V?$list@PAXV?$allocator@PAX@std@@@std@@@ ptr_container_detail@boost@@Uheap_clone_allocator@3@@ ptr_container_detail@boost@@@ptr_container_detail@boost@@@ ptr_container_detail@boost@@QAE@AAV012@@Z) ----- SAMPLE CODE BEGIN ----- #include <boost/ptr_container/ptr_list.hpp> struct Test { int a; int b; }; typedef boost::ptr_list< Test > MyList; typedef MyList::auto_type TestPtr; struct MyClass { MyList theList; void push( TestPtr& t ) { theList.push_back( t.release() ); } TestPtr pop() { TestPtr t = theList.pop_front(); return t; } }; int main( int argc, char* argv[] ) { TestPtr t( new Test ); MyClass c; c.push( t ); t = c.pop(); return 0; } ----- SAMPLE CODE END ----- I'm not aware of the ptr_container library having an import library and am at a loss at why this error is occurring, although it seems to be with the MyClass::pop() method. Is it because it's returning the auto_type by value? If so what are the alternatives? Any help would be greatly appreciated. Thanks Mark.

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[asio] error_code and categories
by Dean Kassmann 17 Nov '06

17 Nov '06

With the new changes to asio error handling; I'm updating some code and running into a problem on windows with vc8 The old syntax: void my_handler(const asio::error& error) { if (!error) { // woot sucess } else { // failure } } The new syntax: void handler(const boost::system::error_code& error) { if (error == boost::asio::error::success) { // doesn't work because error_code::category() differs } else { // failure } } doesn't seem to work because the error_code categories differ. Am I doing somthing wrong/stupid? Cheers, Dean

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[asio] error using cvs version with vc71... multiple definitions
by Andrew Schweitzer 17 Nov '06

17 Nov '06

I am have probably screwed up something simple... I can't seem to compile file including boost/asio.hpp from CVS. I get redefinition errors... apparently Winsock.h, winsock2.h, mswsock.h and some other files seem to be fighting. Any clue what I did wrong or how to fix? Last update was in last couple days. Thanks Andy

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[mpl] - map with more than 20 entries?
by Oliver.Kowalke＠qimonda.com 16 Nov '06

16 Nov '06

Hi, how can I store more than 20 entries in mpl::map? regards, Oliver

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[Date_Time] Question about warnings.
by Seweryn Habdank-Wojewódzki 16 Nov '06

16 Nov '06

Hi! Can anyone tell me why the compilation of the program which uses Boost.Date_Time (boost ver. 1.33) displays 3 warnings: /usr/include/boost/date_time/time_facet.hpp:202: warning: unused parameter 'a_ref' /usr/include/boost/date_time/time.hpp:81: warning: unused parameter 'as_offset' /usr/include/boost/date_time/time.hpp:88: warning: unused parameter 'as_offset' I know this are just warnings, but why they appears? Are that wariables really unused? :-). Best regards. -- |\/\/| Seweryn Habdank-Wojewódzki `\/\/'

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[date_time] local_time_period between two different time zones
by Alberto Giannetti 16 Nov '06

16 Nov '06

I want to calculate the time difference between local_date_time objects that I initialized using two different time zones: #include <iostream> #include <boost/date_time/posix_time/posix_time.hpp> #include <boost/date_time/local_time/local_time.hpp> // TZ database int main(int argc, char* argv[]) { using namespace boost::posix_time; using namespace boost::local_time; tz_database tz_db; try { tz_db.load_from_file("tz.csv"); } catch( data_not_accessible& e ) { std::cerr << "Error with time zone data file: " << e.what() << std::endl; exit(EXIT_FAILURE); } catch( bad_field_count& e ) { std::cerr << "Error with time zone data file: " << e.what() << std::endl; exit(EXIT_FAILURE); } time_zone_ptr tzp_nyc = tz_db.time_zone_from_region("America/New_York"); time_zone_ptr tzp_rome = tz_db.time_zone_from_region("Europe/Rome"); local_date_time nyc_time(second_clock::universal_time(), tzp_nyc); std::cout << "Current time in NY is " << to_simple_string(nyc_time.local_time()) << std::endl; local_date_time rome_time(second_clock::universal_time(), tzp_rome); std::cout << "Current time in Rome is " << to_simple_string(rome_time.local_time()) << std::endl; local_time_period tdiff(nyc_time, rome_time); std::cout << "Difference between time zones: " << tdiff.length() << std::endl; return 0; } tdiff.lenth() returns 00:00:00. Why the function can't return the difference between the two local times? ____________________________________________________________________________________ Sponsored Link $420k for $1,399/mo. Think You Pay Too Much For Your Mortgage? Find Out! www.LowerMyBills.com/lre

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Re: [Boost-users] [Serialization] a coupla crashes from hiearchy complexity
by Reusser, Edward 16 Nov '06

16 Nov '06

Robert, The 1/2 megabyte string being converted is pure XML generated by the xml_oarchive and read in using xml_iarchive in the boost serialization library. It is being inserted as a single tag of an XML item serialized entirely by the xml_oarchive and xml_iarchive in the boost serialization library. I believe that there are only 5 characters that need to be converted: less than (<), greater than (>), quote ("), apostrophe ('), and ampersand (&). Changing a block of text containing these characters to their corresponding escape sequences doesn't seem very difficult to me. It is being done completely automatically by the serialization library. Our current solution, which uses a text archive on the front end and stores the internal strings as xml seems to work for now and completely avoids this conversion. I just wanted to let you know that the conversion routine in the boost serialization library doesn't work for large buffers. I had to laugh at your response at sending this library to you. That certainly wouldn't have been MY first choice, but I did want to make the offer. Ed -----Original Message----- From: Robert Ramey [mailto:ramey@rrsd.com] Sent: Wednesday, November 15, 2006 8:33 PM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] [Serialization] acouplacrashesfromhiearchycomplexity "Reusser, Edward" <Edward.Reusser(a)actel.com> wrote in message news:5E916BAE1732F344BAFD713DF2373479016EAAA9@SV-MSG-01.amer.actel.com... Robert, But the same exact problem occurs. Even using boost serialization, a text value within 2 tags cannot exceed about ½ megabyte in length if it contains escaped character sequences, because when it is read back it will not be properly converted to XML. I know the entire XML string is being translated out to the file because I can open the file and see that it is correct. Furthermore, the serialization library doesn't report any errors in reading the key/value pairs. It isn't until I parse the value using the xml_iarchive that it fails. **** I suspect that both serialization and xerces are having the same problem. The problem is that standards for xml/html escape sequences are ambiguous. and not correctly escaped. This occurs when the string includes non-string charactes like null, and who knows what else. Its probably not a hard fix - but would take alot of time to sort the all the varying standardese. If anyone want's todo this let me know. If your doing 1/2 mb of string - its possible it contains some wierd characters that neither xerces nor I know what to do with. So a couple of things to try would be: a) try xml_wachive - this stores data in UTF-8 and might be more robust. b) try stroign the string as a "binary object". This would consume more spaces as it stores the data in binary coded text - but should be bullit proof. c) If you really, really need this, and you want to do your bit for humanity, you can checkout the xml escape/unescape that the serialization library uses. This is a little out of whack as it uses one method - dataflow iterators to escape, and another - spirit parser to unescape. Maybe that should be changed or at lease looked at. When in doubt - I prefer symmetry as should be apparent from the naming conventions used by the serialization library. As for the 2nd crash, using text_iarchive and text_oarchive within Library B, this still gives the internal structure overflow error. When I get time to go back and look at it again, I will probably rewrite it so that all of the shared_ptr's are stored directly and make other simplifications. If you have a mechanism for me to send this DLL directly to you, then I will attempt to get permission to do so. *** Errrr - thanks but no thanks. I woud prefer to run this via through you. Robert Ramey The information contained in or attached to this email may be subject to the Export Administration Regulations (EAR), administered by the U.S. Department of Commerce, or the International Traffic in Arms Regulations (ITAR), administered by the U.S. Department of State, and may require an export license from the Commerce or State Department prior to its export. An export can include a release or disclosure to a foreign national inside or outside the United States. Include this notice with any reproduced portion of this information.

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