February 2007 - Boost-users

mixing CVS and release
by Torrey Pines 24 Feb '07

24 Feb '07

Hi In general, is it possible to use a CVS version of one Boost component and release versions of everything else (within one program)? If so, is there a description of a procedure for doing that somewhere?

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[program_options] crash in VC++2005
by n.torrey.pines 24 Feb '07

24 Feb '07

In VC++2005 debug mode (Ctrl-F5), this little program aborts: +++++++++++++ begin ++++++++++++++++++++++++ #include <iostream> #include <boost/program_options.hpp> int main(int argc, char * argv[]) { boost::program_options::options_description desc("Allowed options"); desc.add_options() ("some_option", "\ This option description SHOULD be long enough not to fit in one line"); std::cout << desc << '\n'; } ++++++++++++ end +++++++++++++++++++++++++++ The debug assertion failure message is: File: C:\Program Files\Microsoft Visual Studio 8\VC\INCLUDE\xstring Line: 173 Through multiple trials, I found that the error occurs if and only if the option description is long enough not to fit in one line in the window. This is boost-1_33_1 Since I have no prior experience with program_options, perhaps I'm using it incorrectly?

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[serialization] size_t vs unsigned warnings
by n.torrey.pines 23 Feb '07

23 Feb '07

Hi Line 36 in collections_save_imp.hpp says: unsigned int count = s.size(); I'm getting many pages of warnings in VC++2005 stemming from this line. Would it make sense to change that to std::size_t count = s.size() ? If so, should I just edit the line? recompile boost? I'd like to take care of that warning. Thanks

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[Serialization] xml serialization to file and boost::archive::xml_archive_exception (unrecognized XML syntax)
by Andreas Willich 23 Feb '07

23 Feb '07

Hi all I have a annoying problem with xml serialization to a file or std::cout. I want to serialize my own classes to a file via filestream and everytime I get a xml_archive_exception with the error message unrecognized XML syntax. What I want to serialize is a child class from a class hierachy. When I only serialize the part of the mother class (with BOOST_SERIALIZATION_BASE_OBJECT_NVP) it works, but when I also want to save the members of the child classes I get this exception. I have exported every class with BOOST_CLASS_EXPORT and at the base class I have a BOOST_IS_ABSTRACT(baseClass). Gcc brings no warnings or errors and when I use a text archive, all works fine. Has someone an idea what I do wrong or some suggestions? Thanks Andreas Here is my build environment: GCC: Using built-in specs. Target: i686-pc-linux-gnu Configured with: /var/tmp/portage/sys-devel/gcc-4.1.1-r3/work/gcc-4.1.1/configure --prefix=/usr --bindir=/usr/i686-pc-linux-gnu/gcc-bin/4.1.1 --includedir=/usr/lib/gcc/i686-pc-linux-gnu/4.1.1/include --datadir=/usr/share/gcc-data/i686-pc-linux-gnu/4.1.1 --mandir=/usr/share/gcc-data/i686-pc-linux-gnu/4.1.1/man --infodir=/usr/share/gcc-data/i686-pc-linux-gnu/4.1.1/info --with-gxx-include-dir=/usr/lib/gcc/i686-pc-linux-gnu/4.1.1/include/g ++-v4 --host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --disable-altivec --enable-nls --without-included-gettext --with-system-zlib --disable-checking --disable-werror --disable-libunwind-exceptions --disable-multilib --disable-libmudflap --disable-libssp --disable-libgcj --enable-languages=c,c++,fortran --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu Thread model: posix gcc version 4.1.1 (Gentoo 4.1.1-r3) Glibc: 2.5 BOOST: CVS Build RC_1_34_0 from 19.02.2007 BJAM: Boost.Jam Version 3.1.13. OS=LINUX. Copyright 1993-2002 Christopher Seiwald and Perforce Software, Inc. Copyright 2001 David Turner. Copyright 2001-2004 David Abrahams. Copyright 2002-2005 Rene Rivera. Copyright 2003-2005 Vladimir Prus.

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VS2005 Toolset for builidng boost targeting x64.
by Michael Doris 23 Feb '07

23 Feb '07

Hi I've had a good search but I can't find out how I might go about building boost targetting x64 using Visual Studio 2005. I've had no problem targetting 32-bit windows. Thanks, Mike Doris

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[multi_index] index based on case-insensitive strings
by Boris 23 Feb '07

23 Feb '07

struct employee { std::string name; }; typedef multi_index_container< employee, indexed_by< hashed_unique<member<employee, std::string, &employee::name> > > > mi; If I want to change the index to make it case-insensitive I have to write my own key extractor, right? Would the following code then be correct (it is based on boost::multi_index::member)? template<class Class, std::string Class::*PtrToMember> struct caseinsensitive_string { typedef std::string result_type; template<typename ChainedPtr> std::string operator()(const ChainedPtr& x) const { return operator()(*x); } std::string operator()(const Class& x) const { return boost::algorithm::to_lower_copy(x.*PtrToMember); } std::string operator()(Class& x) const { return boost::algorithm::to_lower_copy(x.*PtrToMember); } std::string operator()(const boost::reference_wrapper<const Class>& x) const { return operator()(x.get()); } std::string operator()(const boost::reference_wrapper<Class> x) const { return operator()(x.get()); } }; With the following typedef I get a container which does not change the name of an employee (I want to retain the name without making it lower- or uppercase) but refuses items with the same case-insensitive name? typedef multi_index_container< employee, indexed_by< hashed_unique<caseinsensitive_string<employee, &employee::name> > > > mi2; Boris

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[regex] Support for right-to-left parsing?
by Geraint Bundy 23 Feb '07

23 Feb '07

Hello, Does Boost::Regex support "backwards" or right-to-left parsing (like .NET's regex)? If not, then is it possible to emulate this behaviour using normal parsing? Thanks, Geraint

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Linker error when using boost::wregex (MSVC)
by Fernando Cuenca 23 Feb '07

23 Feb '07

Hi, I'm trying to use the regex library (from boost 1.33) with the MSVC.NET 2003 and I'm getting the following linker error when using the wide character version of the classes: libboost_regex-vc71-mt-1_33_1.lib(usinstances.obj) : error LNK2005: "public: static bool __cdecl std::char_traits<unsigned short>::eq(unsigned short const &,unsigned short const &)" (?eq@?$char_traits@G@std@@SA_NABG0@Z) already defined in msvcprt.lib(MSVCP71.dll) libboost_regex-vc71-mt-1_33_1.lib(usinstances.obj) : error LNK2005: "public: static unsigned int __cdecl std::char_traits<unsigned short>::length(unsigned short const *)" (?length@?$char_traits@G@std@@SAIPBG@Z) already defined in msvcprt.lib(MSVCP71.dll) Declaring a single wregex object is enough to get the error. Everything works fine for regular regex objects (using regular std::strings.) Any ideas how to solve this problem? Thanks in advance. Saludos! Fernando. -------------------------------------------------------------------------------------------------------------------- Confidentiality Notice: The information in this email is confidential and may be privileged. It is intended solely for the addressee(s). If the reader of this message is not the intended recipient, any disclosure, copying, distribution, retention or action taken or omitted to be taken in reliance on it is prohibited. If you have received this communication in error, please notify us immediately by replying to the message or by telephoning either 905-624-1260 or 1-888-672-5471 and deleting it and any attachments from your computer system.

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[multi_index] function to force to recreate indexes?
by Boris 23 Feb '07

23 Feb '07

I have two multi_index_containers with smart pointers which refer to the same objects (at least some of the pointers refer to the objects). When I access and modify an object via an index of one of the two multi_index_containers the indexes of that container are recreated as far as I understand. But how do I make the other multi_index_container recreate its indexes? I can't and don't need to modify the object again. Is there anything to force a multi_index_container to recreate its indexes? Boris

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iterator_range error
by abir basak 23 Feb '07

23 Feb '07

I am facing problem related to iterator_range. It's type is not propagating properly, when I return such thing from a function. (compiler VS 7.1 ,Windows ) The code below shows it. This is an extension of a vector, which returns range. typedef std::pair<std::size_t,std::size_t> pair_t; typedef std::vector<std::size_t> index_t; template<typename T> class vector_e : private std::vector<T>{ public: typedef vector_e<T> self_type; typedef typename std::vector<T>::iterator iterator; typedef typename std::vector<T>::const_iterator const_iterator; typedef typename std::vector<T>::pointer pointer; typedef typename std::vector<T>::const_pointer const_pointer; typedef typename std::vector<T>::reference reference; typedef typename std::vector<T>::const_reference const_reference; typedef typename std::vector<T>::difference_type difference_type; typedef typename std::vector<T>::size_type size_type; //typedef sub_range_t<self_type> range; //typedef sub_range_t<const self_type> const_range; typedef typename std::vector<T>::size_type size_type; typedef typename boost::permutation_iterator<typename iterator,typename index_t::const_iterator> index_iterator; typedef typename boost::permutation_iterator<typename const_iterator,typename index_t::const_iterator> const_index_iterator; //typedef sub_range_t<self_type,index_iterator,const_index_iterator> index_range; //typedef sub_range_t<self_type,const_index_iterator,const_index_iterator> const_index_range; typedef boost::iterator_range<index_iterator> index_range; typedef boost::iterator_range<const_index_iterator> const_index_range; typedef boost::sub_range<self_type> range; typedef boost::sub_range<const self_type> const_range; vector_e() : std::vector<T>(){} using std::vector<T>::begin; using std::vector<T>::end; using std::vector<T>::operator []; using std::vector<T>::insert; const_iterator const_begin()const{ return begin(); } const_iterator const_end()const{ return end(); } index_iterator begin_i(const index_t& i){ return boost::make_permutation_iterator(begin(),i.begin()); } const_index_iterator begin_i(const index_t& i)const{ return boost::make_permutation_iterator(begin(),i.begin()); } index_iterator end_i(const index_t& i){ return boost::make_permutation_iterator(begin(),i.end()); } const_index_iterator end_i(const index_t& i)const{ return boost::make_permutation_iterator(begin(),i.end()); } range get_range(const pair_t& r){ return boost::make_iterator_range(begin()+r.first,begin()+r.second); } const_range get_range(const pair_t& r)const{ return boost::make_iterator_range(begin()+r.first,begin()+r.second); } index_range get_range(const index_t& i){ index_iterator b = boost::make_permutation_iterator(begin(),i.begin()); index_iterator e = boost::make_permutation_iterator(begin(),i.end()); return boost::make_iterator_range(b,e); } const_index_range get_range(const index_t& i)const{ const_index_iterator b = boost::make_permutation_iterator(begin(),i.begin()); const_index_iterator e = boost::make_permutation_iterator(begin(),i.end()); return boost::make_iterator_range(b,e); } }; Now, to use it like this, typedef vector_e<trace> trace_buffer; typedef boost::permutation_iterator<trace_buffer::iterator,index_t::iterator> index_iterator; typedef boost::sub_range<trace_buffer> trace_range; typedef boost::iterator_range<index_iterator> trace_index_range; trace_buffer traces; struct character{ index_t index; trace_index_range get_traces(){ index_iterator b = boost::make_permutation_iterator(traces.begin(),index.begin()); index_iterator e = boost::make_permutation_iterator(traces.begin(),index.end()); //return boost::make_iterator_range(b,e); return traces.get_range(index);///This doesn't work, while previous commented line works ! } }; Thus to say, I am unable to forward a call to iterator_range from one function to another preserving the type. (Previously the same problem was there with sub_range with 1.33.1 download. Now that one is solved with a later cvs version ) . Any help is appreciated .... thanks' abir -- Abir Basak, Member IEEE Software Engineer, Read Ink Technologies B. Tech, IIT Kharagpur email: abir(a)abirbasak.com homepage: www.abirbasak.com

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