- Boost-users - lists.boost.org

Extracting libraries from boost?
by Angel Tsankov 31 Oct '07

31 Oct '07

Can libraries in boost be used on their own, i.e. can I extract one of them and use it in a project? In particular, I only need the smart_ptr and ref libraries in one of my projects.

4 4

Regex: Invalid preceding regular expression problem
by Brian Krahmer 31 Oct '07

31 Oct '07

Hello, I'm a new member to the mailing list. BTW, thanks to everyone who contributes to boost. It's a fantastic software. I am having a problem with building an expression object. The line in question reads 'boost::regex expression(pattern, options);', where I'm using the boost::regex::extended option, and the pattern looks like this: "^([0-7]\\..*|8\\.0(\\.[0-3](\\.[0-3])?)?)[^.0-9]*?$". I fired up a ruby interpreter, and it handled the regex fine (using "8.0.0.1 (en-US)" as a positive, and "9.0.0.1 (en-US)" as a negative). Can anybody tell me what is wrong with this regex, or confirm that there may be a bug in the library? thanks, brian

2 1

[Regex] Why does this example code not compile?
by Mike Thornton 31 Oct '07

31 Oct '07

Using g++ on a GNU Ubuntu Linux 7.04 machine, I am unable to compile the boost example code (saved as test.cpp) at http://www.boost.org/libs/regex/example/snippets/partial_regex_match.cpp Although I can compile my own code which does not use boost, I get a lot of garbled output from the example code...part of which is listed below. Any ideas on what is wrong and how to fix it? test.cpp : (.text._ZN5boost9re_detail12perl_matcherIN9__gnu_cxx17__normal_iteratorIPKcSsEESaINS_9sub_matchIS6_EEENS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEEC1ES6_S6_RNS_13match_resultsIS6_S9_EERKNS_11basic_regexIcSD_EENS_15regex_constants12_match_flagsES6_[boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::perl_matcher(__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, boost::match_results<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&, boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::_match_flags, __gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >)]+0xea): undefined reference to `boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::construct_init(boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::_match_flags)' Thanks. Mike

4 4

Using date/time to format date strings
by Andrew 31 Oct '07

31 Oct '07

Hi all, I'm trying to use the date time library to to do some string formatting but I'm afraid there's something I'm missing. What I'd like to do is feed in a string "05/Aug/2007 11:30" and convert it to an ISO formatted string - could anyone point me in the right direction? I've examined both the documentation and the sample code in io_tutorial.cpp but I'm afraid it hasn't helped - the code below is as far as I've gotten and simply returns the input string unchanged. I'm using boost 1.34.1 with MSVC 2005. Thanks much, Andrew //Begin snippit string formatDate(string inpDate) { stringstream ss; local_date_time checkDate(not_a_date_time); local_time_input_facet* input_facet = new local_time_input_facet(); local_time_facet* output_facet = new local_time_facet(); ss.imbue(locale(locale::classic(), output_facet)); ss.imbue(locale(ss.getloc(), input_facet)); input_facet->format("%d/%b/%Y %H:%M"); output_facet->set_iso_format(); ss << inpDate; return ss.str(); }

2 2

[statechart] direct manipulation of event queue?
by Chris Paulse 30 Oct '07

30 Oct '07

How easy would it be to directly remove specific types of events from a state machine's event queue?

2 2

Beginner question about PocketPC 2003
by Dmytro Bogovych 30 Oct '07

30 Oct '07

Greetings. I downloaded 1.34.1 build from Boost Consulting. It comes with prebuilt libraries for VS 2005. I like it very much as I use Boost.Thread in my projects. But this package comes without prebuild libraries for PocketPC 2003 ARM target. How can I build them? I read about bjam but don't see what arguments I should set. This - bjam --v2 "-sTOOLS=msvc" "-sBUILD=release <windows>pocketpc2003 <charset>wide <architecture>arm4" install doesn't work. Sorry for stupid question.

1 0

[multi-index] bug or not?
by Ovanes Markarian 30 Oct '07

30 Oct '07

Hello! I have a question regarding the multi-index behaviour, Let's say I have a multi-index container containing some hashed keys. What should happen with this container is empty and I retrieve an indexed by hash view into it? I have on Visual C++ 2005 an access violation, since I am trying to retrieve a view by it's hashed keys into the const container. Many thanks, Ovanes

3 3

Errors in custom predicate support docu
by Jens Seidel 30 Oct '07

30 Oct '07

Hi, I tried a few times to report the following bug to trac but it was always rejected as spam!?? According to http://www.boost.org/libs/test/doc/components/test_tools/custom_predicate_s… there exists a class boost::test_tools::extended_predicate_value. (Or is it a user supplied class?) Nevertheless I didn't found such a class in Boost.test and even trunk contains only predicate_result which is different. This makes predicate support very hard to use for me. Please provide proper documentation for it! I hope this is the right way to run tests in a loop and to condense the output. Jens

2 1

serialization: curious un-serializing issue RFI
by Hugh Hoover 30 Oct '07

30 Oct '07

I have a curious problem that's just sprung up, after changing from using plain-old-pointers to using boost::shared_ptrs internally in my data structures (stl hash_map and map) The problem is that while the XML archive works correctly, both text and binary fail (they all used to work). This is using gcc 4.0.1 on darwin and VC8 on windows, boost version is 1.34.1 The failure occurs while unserializing an archive, specifically when trying to read back a shared_ptr to an already unserialized object. In the archive, it shows the object (pointer) as an object_reference (the same reference id in XML and text). While the XML version reads the pointer back correctly, the text version fails and returns NULL. I have not determined the exact reason why the text version fails (it doesn't throw, just returns NULL). The serialization does not appear to have any problems. Since my actual code is reasonably complicated, and I haven't created a simplified version that demonstrates the problem, I'm not including code now - I'd just like to find out if this sounds familiar to anyone, that is, working under XML but failing under text and binary. It does appear to be shared_ptr specific, too, since everything was working before replacing naked pointers with shared_ptrs.

2 4

Serialization and raw pointer arrays
by Eric 30 Oct '07

30 Oct '07

Hi, I've inherited some complex math code that makes large usage of Matrices based on raw pointer arrays. I need to serialize/deserialize these arrays as is and am looking to use boost::serialization package. My attempt at doing so results in the following errors (mostly about non integral array size). As I do not know the array size when it is created (and lots of code accesses the pointer directly as a chunk of memory that has been allocated, what are my options to get this to work? Errors: /usr/include/boost/archive/detail/oserializer.hpp: In function `void boost::archive::save(Archive&, T&) [with Archive = boost::archive::text_oarchive, T = Dummy]': /usr/include/boost/archive/basic_text_oarchive.hpp:78: instantiated from `void boost::archive::basic_text_oarchive<Archive>::save_override(T&, int) [with T = Dummy, Archive = boost::archive::text_oarchive]' /usr/include/boost/archive/detail/interface_oarchive.hpp:78: instantiated from `Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = Dummy, Archive = boost::archive::text_oarchive]' serialize_array.cpp:56: instantiated from here /usr/include/boost/archive/detail/oserializer.hpp:567: error: incomplete type `boost::STATIC_ASSERTION_FAILURE< false>' used in nested name specifier /usr/include/boost/archive/detail/oserializer.hpp:567: error: size of array has non-integral type `<type error>' Code: #include <boost/serialization/split_member.hpp> #include <fstream> #include <iostream> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> using namespace std; class Dummy { public: friend class boost::serialization::access; Dummy() {pVal=NULL;size=0;} ~Dummy() {delete [] pVal;} template<class Archive> void save(Archive & ar, const unsigned int version) const { ar & size; for (int i=0; i<size; i++) { ar & pVal[i]; } } template<class Archive> void load(Archive & ar, const unsigned int version) { ar & size; pVal = new int[size]; for (int i=0; i<size; i++) { ar & pVal[i]; } } int* pVal; int size; }; BOOST_CLASS_VERSION(Dummy, 1) int main(int argc, char** argv) { Dummy d; d.size = 5; d.pVal = new int[d.size]; for (int i=0; i< d.size; i++) { d.pVal[i] = i+10; } ofstream ofOut("testSer.txt"); { boost::archive::text_oarchive oa(ofOut); oa << d; } Dummy load; { ifstream ifIn("testSer.txt"); boost::archive::text_iarchive ia(ifIn); ia >> load; } cout << "size="<<load.size<<endl; for (int i=0; i< load.size; i++) { cout << load.pVal[i] <<endl; } return -1; } Thanks, Eric

3 2