- Boost-users - lists.preview.boost.org

[spirit] how to get_position() from a multi_pass<position_iterator <const char*> >
by Peter Schueller 23 Aug '09

23 Aug '09

Hi, I use a position_iterator<const char*> for parsing with boost::spirit. Because I need the regex_p feature, I have to wrap this iterator using a multi_pass iterator. I call pt_parse and get a boost::spirit::tree_parse_info<multi_pass<position_iterator<const char*> >, ...> parse_info. Now I have problems calling the get_position() method on "parse_info.stop". I guess this is the case because multi_pass does not store my iterator but wraps it using boost::iterator which loses the position features of position_iterators and only keeps the const char* pointer. Do you have an advice for me? Thanks and best regards, Peter

6 15

[iostreams] [archive] [serialization] lexical_cast<string> with binary_archive vs. text_archive
by Johann Goetz 23 Aug '09

23 Aug '09

Consider the following serialization archive. I can serialize a collection of variables (floats, ints, etc) through the series: numerics --> text_oarchive --> gzip --> output_file The text_archive step is essentially a stringstream filter. This filter gives the serialization the portability I (sometimes) need. namespace io = boost::iostreams; namespace ar = boost::archive; io::filtering_ostream fos; fis.push(io::gzip_compressor()); fis.push(io::file_sink("output.txt.gz")); ar::text_oarchive oa(fos); OK. Now what I wish to do is to create a binary_archive and to push the stringstream filter to the filtering_ostream: numerics -> binary_archive -> lexical_cast<string> -> gzip -> out_file This way I could turn this part (and the gzip) on or off at will (the ol' speed vs portability thing): io::filtering_ostream fos; fis.push(/*stringstream_filter*/); fis.push(io::gzip_compressor()); fis.push(io::file_sink("output.txt.gz")); ar::binary_oarchive oa(fos); I am not sure how to create such a filter, but I'm guessing such a filter already exists. Perhaps the answer lies in lexical_cast<string>? any help with this would be greatly appreciated, thanks! Johann.

2 1

boost::math function link problem
by joe claire 22 Aug '09

22 Aug '09

Hi all, I am new to boost library. First of all, I apologize that my question will be pretty basic to people in this mailing list, nevertheless I have spent 30 min + to figure it out and couldn't find the answer. So, here it goes... I need to find which library (lib*.a) file contains the "ibeta" function which is defined under boost/math/special_functions/gamma.hpp. When I compile the following simple test.cpp ----------------------------------------- #include <boost/math/special_functions/gamma.hpp> #include <iostream> using namespace std; using namespace boost::math; int main() { cout << "it is my birthday...\n"; cout << ibeta(5, 2, 0.5) << "\n"; } ----------------------------------------- with this command line, g++ -I /my_own_boost_root_path/ test.cpp I get link error message (undefined reference) /tmp/ccgrrT4l.o: In function `main': test.cpp:(.text+0xc1): undefined reference to `boost::math::tools::promote_args<int, int, double, float, float, float>::type boost::math::ibeta<int, int, double>(int, int, double)' collect2: ld returned 1 exit status I know that I just need to put the correct library in the command line, but I can't figure it out. There are 6 lib*.a files in boost_build_dir/bin.vs/libs/math/build/gcc-4.1.2/release/link-static/threading-multi/ I tried to each of them at the end of my compilation command line, in the hope that "ibeta" is contained in one of them, but I failed. 1. Where should I look to find the lib*.a that contains "ibeta" (ibeta is incomplete beta function integral) 2. In general, how do I figure out which lib*.a to use, when I need to use specific classes or functions? (I have looked at "getting started", and "libraries" for proper documentation, but they explain in detail the available libraries, but, not what lib*.a file to use for specific functions...) 3. Is it possible that "ibeta" is not built Thanks a lot !

3 3

boost:thread compiling problem
by Shaolin 22 Aug '09

22 Aug '09

Hi Guys I am try to create a thread with boost but eveytime I execute I get some freaky error messages. See code below followed by error msg: #include <boost/thread/thread.hpp> #include <iostream> using namespace std; void hello() { cout << "hello" << endl; } int main(int argc, char* argv[]) { boost::thread thrd1(&hello); // ERROR caused by the &hello param thrd1.join(); } *Error Message*: /tmp/cc3ymRwv.o: In function `main': main.cc:(.text+0x417): undefined reference to `boost::thread::join()' main.cc:(.text+0x422): undefined reference to `boost::thread::~thread()' main.cc:(.text+0x43b): undefined reference to `boost::thread::~thread()' /tmp/cc3ymRwv.o: In function `boost::mutex::mutex()': main.cc:(.text._ZN5boost5mutexC1Ev[boost::mutex::mutex()]+0x45): undefined reference to `boost::thread_resource_error::thread_resource_error()' main.cc:(.text._ZN5boost5mutexC1Ev[boost::mutex::mutex()]+0x4d): undefined reference to `boost::thread_resource_error::~thread_resource_error()' main.cc:(.text._ZN5boost5mutexC1Ev[boost::mutex::mutex()]+0x55): undefined reference to `typeinfo for boost::thread_resource_error' /tmp/cc3ymRwv.o: In function `boost::detail::thread_data<void (*)()>::~thread_data()': main.cc:(.text._ZN5boost6detail11thread_dataIPFvvEED0Ev[boost::detail::thread_data<void (*)()>::~thread_data()]+0x16): undefined reference to `boost::detail::thread_data_base::~thread_data_base()' /tmp/cc3ymRwv.o: In function `boost::detail::thread_data<void (*)()>::~thread_data()': main.cc:(.text._ZN5boost6detail11thread_dataIPFvvEED1Ev[boost::detail::thread_data<void (*)()>::~thread_data()]+0x16): undefined reference to `boost::detail::thread_data_base::~thread_data_base()' /tmp/cc3ymRwv.o: In function `boost::condition_variable::condition_variable()': main.cc:(.text._ZN5boost18condition_variableC1Ev[boost::condition_variable::condition_variable()]+0x3a): undefined reference to `boost::thread_resource_error::thread_resource_error()' main.cc:(.text._ZN5boost18condition_variableC1Ev[boost::condition_variable::condition_variable()]+0x42): undefined reference to `boost::thread_resource_error::~thread_resource_error()' main.cc:(.text._ZN5boost18condition_variableC1Ev[boost::condition_variable::condition_variable()]+0x4a): undefined reference to `typeinfo for boost::thread_resource_error' /tmp/cc3ymRwv.o: In function `boost::detail::thread_data_base::thread_data_base()': main.cc:(.text._ZN5boost6detail16thread_data_baseC2Ev[boost::detail::thread_data_base::thread_data_base()]+0x1b): undefined reference to `vtable for boost::detail::thread_data_base' /tmp/cc3ymRwv.o: In function `boost::thread::thread<void (*)()>(void (*)(), boost::disable_if<boost::is_convertible<void (*&)(), boost::detail::thread_move_t<void (*)()> >, boost::thread::dummy*>::type)': main.cc:(.text._ZN5boost6threadC1IPFvvEEET_NS_10disable_ifINS_14is_convertibleIRS4_NS_6detail13thread_move_tIS4_EEEEPNS0_5dummyEE4typeE[boost::thread::thread<void (*)()>(void (*)(), boost::disable_if<boost::is_convertible<void (*&)(), boost::detail::thread_move_t<void (*)()> >, boost::thread::dummy*>::type)]+0x32): undefined reference to `boost::thread::start_thread()' /tmp/cc3ymRwv.o:(.rodata._ZTIN5boost6detail11thread_dataIPFvvEEE[typeinfo for boost::detail::thread_data<void (*)()>]+0x8): undefined reference to `typeinfo for boost::detail::thread_data_base' collect2: ld returned 1 exit status

6 12

Unordered map copy segfaults! (STL map does not)
by MeMooMeM 21 Aug '09

21 Aug '09

Hi everyone, When I copy an unordered map, it segfaults. I am not having the same problem with STL's map. Using an unordered map is essential for performance, so I would really appreciate any help! Any ideas? Here are the details: ================ typedef boost::unordered_map<unsigned long long, Dest> MyMap; MyMap a; ... ... // (I populate map 'a' here in a loop) ... MyMap b; b = a; // Segfaults! (also, I do not want to initialize b with a as in MyMap b(a), I want to copy it later in the code.) Where Dest is a struct: struct Dest{ bool exists; int num; int src; int dest; unsigned short pos[64]; Dest () { exists = false; num = 0; src = 0; dest = 0; } ~Dest() { } }; -- View this message in context: http://www.nabble.com/Unordered-map-copy-segfaults%21-%28STL-map-does-not%2… Sent from the Boost - Users mailing list archive at Nabble.com.

2 3

Private unordered map in openMP
by MeMooMeM 21 Aug '09

21 Aug '09

Hi everyone, I am trying to assign one private unordered map per thread. As you know, I cannot declare a new array inside the parallel section and make it private. So I declared a map: typedef boost::unordered_map<int, int> Map_t; ... Map_t localMap; and passed it to the parallel section as private (please see http://www.nabble.com/file/p25088091/doesnotwork.cc doesnotwork.cc ) #pragma omp parallel default(shared) private(iam, i, localMap) { ... } I got the following error: openmptry.cc: In function ‘int main(int, char**)’: openmptry.cc:0: internal compiler error: in lower_stmt, at gimple-low.c:282 Please submit a full bug report, ... ... I can solve this problem by declaring a map pointer, creating local copies using 'new' and changing "++(*localMap)[iam]" to "++localMap[iam]" "localMap->begin()" to "localMap.begin()" etc... (please see http://www.nabble.com/file/p25088091/works.cc works.cc ) But these changes will require lots of editing in the code. So, is there a way to use the map directly? Thanks so much in advance! PS: desired output for these test codes is (in arbitrary order): 2: 2 -> 1 7: 7 -> 1 5: 5 -> 1 6: 6 -> 1 4: 4 -> 1 1: 1 -> 1 3: 3 -> 1 0: 0 -> 1 -- View this message in context: http://www.nabble.com/Private-unordered-map-in-openMP-tp25088091p25088091.h… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

BUG? Spirit Grammar_def
by Leandro Santos de Lima 21 Aug '09

21 Aug '09

I'm trying to migrate my code from VSC++ 6 to VSC++ 2008 express edition and from Intel compiler to Microsoft compiler. Everything were easy to migrate except that I'm receiving this errors now: > 1>------ Build started: Project: Base, Configuration: Debug Win32 ------ 1>Compiling... 1>DefaultScriptReader.cpp 1>Warning: This header is deprecated. Please use: > boost/spirit/include/classic.hpp 1>Warning: This header is deprecated. Please use: > boost/spirit/include/classic_dynamic.hpp 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/dynamic/lazy.hpp(33) > : error C2143: syntax error : missing ';' before '<' 1> > c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/dynamic/lazy.hpp(53) > : see reference to class template instantiation > 'boost::spirit::lazy_parser<ActorT>' being compiled 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/dynamic/lazy.hpp(33) > : error C4430: missing type specifier - int assumed. Note: C++ does not > support default-int 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/dynamic/lazy.hpp(34) > : error C2238: unexpected token(s) preceding ';' 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/dynamic/lazy.hpp(40) > : error C2065: 'actor_result_t' : undeclared identifier 1> > c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/dynamic/lazy.hpp(42) > : see reference to class template instantiation > 'boost::spirit::lazy_parser<ActorT>::result<ScannerT>' being compiled 1>Warning: This header is deprecated. Please use: > boost/spirit/include/phoenix1.hpp 1>Warning: This header is deprecated. Please use: > boost/spirit/include/classic_grammar_def.hpp 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(104) > : error C2039: 'nil_t' : is not a member of 'boost::phoenix' 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(112) > : error C2039: 'nil_t' : is not a member of 'boost::phoenix' 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(180) > : error C2143: syntax error : missing ';' before '<' 1> > c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(299) > : see reference to class template instantiation > 'boost::spirit::grammar_def<T,T0,T1,T2,T3,T4,T5,T6,T7>' being compiled 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(180) > : error C4430: missing type specifier - int assumed. Note: C++ does not > support default-int 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(187) > : error C2238: unexpected token(s) preceding ';' 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(277) > : error C2143: syntax error : missing ';' before '<' 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(277) > : error C4430: missing type specifier - int assumed. Note: C++ does not > support default-int 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(277) > : error C2238: unexpected token(s) preceding ';' 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(277) > : error C2988: unrecognizable template declaration/definition 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(277) > : error C2059: syntax error : '<' 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(297) > : error C2334: unexpected token(s) preceding ':'; skipping apparent function > body 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(298) > : error C2760: syntax error : expected '{' not ';' 1>c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(299) > : fatal error C1075: end of file found before the left brace '{' at > 'c:\Desenvolvimento\dff_dependencies_windows\include\boost/spirit/home/classic/utility/grammar_def.hpp(54)' > was matched 1>Build log was saved at > "file://c:\Desenvolvimento\DFF\VC9\Base\Debug\BuildLog.htm" 1>Base - 17 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== How you can see, the MS Compiler shows syntax errors on boost library. I found on boost site that this compiler, version 9, is compatible to the library. So, what is going on to my code? Thanks Leandro Lima

3 5

Help with compiling boost for Debian (receiving file not found error when compiling boost-dependant program)
by Jónatan Nilsson 21 Aug '09

21 Aug '09

Hi all. I am trying to compile Ghost++, a Warcraft 3 dedicated server program and one of it's dependency is Boost. The following is the instruction on how to compile Boost from the Ghost++ documentation (a.k.a. the readme file): -------------------------------- You'll need Boost version 1.38.0 (or potentially any newer versions). If your package manager has this version available please use it instead of installing it manually. To install Boost manually: 7. Download and extract Boost 1.38.0 from http://www.boost.org/ 8. su to root. 9. ./configure --prefix=/usr --with-libraries=date_time,thread,system,filesystem,regex 10. Edit the newly created Makefile with your favourite text editor. The second line should be "BJAM_CONFIG=". Replace it with "BJAM_CONFIG= --layout=system". 11. make install -------------------------------- Unfortunately you have removed the ./confiigure and make and replaced them with new commands: bootstrap & bjam. I tried running the following commands: -------------------------------- ./bootstrap.sh --with-libraries=date_time,thread,system,filesystem,regex ./bjam install -------------------------------- But when I try to 'make' Ghost++ I get the following error: -------------------------------- # make ... bnet.cpp:38:32: error: boost/filesystem.hpp: No such file or directory bnet.cpp:39:27: error: boost/regex.hpp: No such file or directory ... -------------------------------- What am I doing wrong :S I am using debian linux and I tried to apt-get install boost but the newest version there was 1.35 and when I tried running 'make' on Ghost++ after installing those packages I received a new set of errors: -------------------------------- bnet.cpp:1739: error: âclass boost::filesystem::basic_directory_entry<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >â has no member named âfilenameâ bnet.cpp:1741: error: âclass boost::filesystem::basic_directory_entry<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >â has no member named âfilenameâ bnet.cpp:1757: error: âstruct boost::filesystem::pathâ has no member named âfilenameâ make: *** [bnet.o] Error 1 -------------------------------- Now I am stuck with no idea on what could be wrong with the boost installation... Much help appreciated :) Sincerely: Jonatan Nilsson Iceland

4 3

[scoped_array] and boost::begin()
by Robert Jones 21 Aug '09

21 Aug '09

I am shocked to discover that boost::begin() etc, does not seem to work for boost::scoped_array. Is there a reason for this? - Rob.

2 4

Boost::iostreams::device::file_descriptor* not implemented?
by Grzegorz Slodkowicz 21 Aug '09

21 Aug '09

Hi, I can't seem to get file_descriptor* family of classes to work. I've reduced my code to the following (actually I want to write to sockets): #include <boost/iostreams/device/file_descriptor.hpp> #include <boost/iostreams/stream.hpp> namespace io = boost::iostreams; int main(int argc, char *argv[]) { typedef io::stream<io::file_descriptor_sink> ofdstream; ofdstream outstream(1); } Here's what happens when I try to compile (under Mac OS X): erato:bioinf jergosh$ g++ -I/usr/local/boost_1_39_0 -o fdboost fdboost.cpp Undefined symbols: "boost::iostreams::file_descriptor::file_descriptor(int, bool)", referenced from: boost::iostreams::file_descriptor_sink::file_descriptor_sink(int, bool)in ccuxOs9P.o "boost::iostreams::file_descriptor::close()", referenced from: void boost ::iostreams ::detail ::close_impl < boost ::iostreams ::closable_tag > ::close < boost ::iostreams ::file_descriptor_sink>(boost::iostreams::file_descriptor_sink&, std::_Ios_Openmode)in ccuxOs9P.o "boost::iostreams::file_descriptor::write(char const*, int)", referenced from: int boost ::iostreams ::detail ::write_device_impl < boost ::iostreams ::output > ::write < boost ::iostreams ::file_descriptor_sink>(boost::iostreams::file_descriptor_sink&, boost ::iostreams ::char_type_of<boost::iostreams::file_descriptor_sink>::type const*, int)in ccuxOs9P.o "boost::iostreams::file_descriptor::seek(long long, std::_Ios_Seekdir)", referenced from: std::fpos<__mbstate_t> boost ::iostreams ::detail ::seek_device_impl < boost ::iostreams ::any_tag > ::seek < boost ::iostreams ::file_descriptor_sink>(boost::iostreams::file_descriptor_sink&, long long, std::_Ios_Seekdir, std::_Ios_Openmode)in ccuxOs9P.o ld: symbol(s) not found collect2: ld returned 1 exit status What am I missing here? TIA, Greg -- Greg Slodkowicz Building 208, Room 012a Center for Biological Sequence Analysis Department of Systems Biology Technical University of Denmark

2 1

Trying to compile boost 1.40
by Mathieu Malaterre 21 Aug '09

21 Aug '09

Hi there, I am trying to compile boost 1.40 to start playing with the PBGL. I tried using bjam and followed the basic instructions but it fails to inspect my system and leads to: $ ./bjam install Note: Building Boost.Regex with Unicode/ICU support enabled Using ICU in /usr/include warning: Graph library does not contain optional GraphML reader. note: to enable GraphML support, set EXPAT_INCLUDE and EXPAT_LIBPATH to the note: directories containing the Expat headers and libraries, respectively. warning: Graph library does not contain MPI-based parallel components. note: to enable them, add "using mpi ;" to your user_config.jam warning: skipping optional Message Passing Interface (MPI) library. note: to enable MPI support, add "using mpi ;" to user-config.jam. note: to suppress this message, pass "--without-mpi" to bjam. note: otherwise, you can safely ignore this message. I would think I need mpi to get PBGL working, so I decided to switch to cmake. But again it is failing: $ mkdir bin && cmake .. && make modularize && make && make install leads to: /usr/bin/cmake -E cmake_progress_report /home/mathieu/Software/boost_1_40_0_beta1/bin/CMakeFiles [ 97%] Building CXX object tools/inspect/CMakeFiles/inspect.dir/license_check.cpp.o cd /home/mathieu/Software/boost_1_40_0_beta1/bin/tools/inspect && /usr/bin/c++ -DBOOST_ALL_NO_LIB=1 -I/home/mathieu/Software/boost_1_40_0_beta1 -I/home/mathieu/Software/boost_1_40_0_beta1/libs/inspect/include -O3 -DNDEBUG -pthread -D_REENTRANT -o CMakeFiles/inspect.dir/license_check.cpp.o -c /home/mathieu/Software/boost_1_40_0_beta1/tools/inspect/license_check.cpp /home/mathieu/Software/boost_1_40_0_beta1/tools/inspect/license_check.cpp:8:27: error: boost/regex.hpp: No such file or directory /home/mathieu/Software/boost_1_40_0_beta1/tools/inspect/license_check.cpp:13: error: ‘regex’ in namespace ‘boost’ does not name a type /home/mathieu/Software/boost_1_40_0_beta1/tools/inspect/license_check.cpp: In member function ‘virtual void boost::inspect::license_check::inspect(const std::string&, const boost::filesystem::path&, const std::string&)’: /home/mathieu/Software/boost_1_40_0_beta1/tools/inspect/license_check.cpp:39: error: ‘regex_search’ is not a member of ‘boost’ /home/mathieu/Software/boost_1_40_0_beta1/tools/inspect/license_check.cpp:39: error: ‘license_regex’ was not declared in this scope make[2]: *** [tools/inspect/CMakeFiles/inspect.dir/license_check.cpp.o] Error 1 make[2]: Leaving directory `/home/mathieu/Software/boost_1_40_0_beta1/bin' make[1]: *** [tools/inspect/CMakeFiles/inspect.dir/all] Error 2 make[1]: Leaving directory `/home/mathieu/Software/boost_1_40_0_beta1/bin' make: *** [all] Error 2 Finally I tried using boost trunk (r55688), but it leads to: [ 17%] Building CXX object libs/spirit/example/qi/CMakeFiles/spirit-calc6.dir/calc6/calc6.cpp.o /home/mathieu/Software/boost-trunk/libs/spirit/example/karma/printf_style_double_format.cpp: In member function ‘int format_policies<T>::floatfield(T) const’: /home/mathieu/Software/boost-trunk/libs/spirit/example/karma/printf_style_double_format.cpp:141: error: ‘base_type’ has not been declared /home/mathieu/Software/boost-trunk/libs/spirit/example/karma/printf_style_double_format.cpp:144: error: ‘base_type’ has not been declared /home/mathieu/Software/boost-trunk/libs/spirit/example/karma/printf_style_double_format.cpp: In member function ‘bool format_policies<T>::exponent(OutputIterator&, long int) const’: /home/mathieu/Software/boost-trunk/libs/spirit/example/karma/printf_style_double_format.cpp:181: error: expected primary-expression before ‘,’ token /home/mathieu/Software/boost-trunk/libs/spirit/example/karma/printf_style_double_format.cpp:181: error: expected primary-expression before ‘>’ token /home/mathieu/Software/boost-trunk/libs/spirit/example/karma/printf_style_double_format.cpp:183: error: expected primary-expression before ‘,’ token /home/mathieu/Software/boost-trunk/libs/spirit/example/karma/printf_style_double_format.cpp:183: error: expected primary-expression before ‘>’ token System: Debian 5.0, gcc --version 4.3.4 Thanks for hints, -- Mathieu

2 6

boost.pp : generate a const size_t array initializer
by Hicham Mouline 21 Aug '09

21 Aug '09

Hello, I have const size_t MaxNumber = 16; Can I generate this: const size_t elts[MaxNumber] = {0, 1, ..., 15}; with Boost.PP? I suppose I need to #define MaxNumber for PP? Regards,

2 3

Multiple calls to tcp::socket::async_receive fail on Windows
by Peter Chapman 21 Aug '09

21 Aug '09

I'm under the impression that queueing several async reads will allow the OS to fill one buffer while the read handler for a previous read is still executing. This comes partly from reading: http://www.jetbyte.com/portfolio-showarticle.asp?articleId=44&catId=1&subca… Although I can't find any mention of this practice in the asio docs or examples, it seems to "mostly work". And it makes logical sense. My program is: - Single-threaded - Not using "composed" reads (ie boost::asio::async_read) On Linux this technique works fine for multiple pending reads. On Windows, it sometimes leads to handlers being called in the wrong order. My sample program (attached) can be called in 2 ways: a) to write a known data stream to a socket b) to compare the same stream of data to bytes being read from a socket via multiple async_receive()s. So in one terminal, receive data using 8 concurrent async_receives: async_recv.exe receive 8 and in the other: async_recv.exe send On Windows (XP Pro 64, boost 1.39), the first program exits within a few seconds saying "streams differ". I haven't been able to reproduce the failure on XP Pro 32, Server 2003 or Linux, although this may just be timing dependent. Am I doing something wrong or unreasonable? Thanks! Pete

1 1

Cpp-Next - slightly OT
by Robert Jones 21 Aug '09

21 Aug '09

There's a terrific article about RVO and copy elision by Dave A at http://cpp-next.com/ If I understand this correctly a decent compiler (say VS2008) will compile this sequence using namespace std; typedef vector< string > V; V get_names( ); V sorted(V names) { sort(names); V ret; swap(ret, names); return ret; } V v = sorted( get_names( ) ); to generate zero copies - the final value of v will be the actual object generated by get_names(). Whereas this code sequence using namespace std; typedef vector< string > V; V get_names( ); V sorted(V names) { sort(names); V ret; swap(ret, names); return ret; } V tmp = get_names( ); V v = sorted( tmp ); Generates exactly one vector copy operation, at the call site of sorted(). Does that sound right? - Rob.

2 1

[boost::asio] Problem connecting to remote host
by Silvio Reis Junior 21 Aug '09

21 Aug '09

Hello folks.I'm rewriting the following perl script http://images.rapidshare.com/software/rsapiresume.pl using boost::asio for sockets operations. The code uploads files to rapidshare.com. To ao it it asks for an available server for uploading. To request the free server my code works just fine but when I try to connect to the upload server it gives an exception. I thought that something was wrong with the server domain which is something like rsXXX13.rapidshare.com but the perl code uses the same format and it works. Maybe I'm making some mistake, so I'd appreciate if you could give me some advise. I'm attaching the code I'm experiencing with. Thanks in advance! Silvio Reis Júnior -- http://twitter.com/sreisjr

1 0

Re: [Boost-users] include issues
by Shaolin 20 Aug '09

20 Aug '09

Hi Guys I am having problems with includes. I have the boost folder in my c++ program folder and use the following include statement to use the thread.hpp file: #include "boost/thread/thread.hpp" However, everytime I compile (g++ myprogram.cc) I get the following error message: boost/thread/thread.hpp: No such file or directory Where am I going wrong ? I just downloaded the foleder and moved it to my c++ application dir.

3 3

[Serialization : decending compatibility] Additional attributes prevent de-serialization by previous
by francoisramond＠gmail.com 20 Aug '09

20 Aug '09

Hello, I work on an industrial application which uses XML Boost Serialization as a way to store and retrieve production scheduling solutions from XML files. I've been using Serialization for years and I really enjoy the ease of use and the flexibility it provides. Recently, I released a new version (say V2) of that application, in which some C++ classes have additional attributes of new classes with respect to the previous version (V1). The new software (V2) can still read files serialized by the earlier version V1 (ascending compatibility), but XML files serialized by V2 cannot be read by V1. I guess Boost Serialization wasn't designed for such "descending compatibility", nevertheless, during industrial production some unexpected bug on V2 might require to use V1 again (as it is stable), without loosing the scheduling solutions generated by V2. From an XML file generated by V2, I somehow managed to remove the parts XML associated to the new attributes (the additional information can be skipped), and re-number some class_id to make the file readable by V1, but this is quite time-consuming, and I can't automate this process since the numbering of class_id depends on the solution serialized. Any idea to make V2 serialized files readable by V1, either by modifying V2 or by an automated process to edit the files (I can't bring any modification to the source code of V1) would be really appreciated. Thanks for reading till here and, hopefully, for your help, François

3 3

Inheriting from boost::function
by joel 20 Aug '09

20 Aug '09

Is it ok to inherit from boost::function or does its impelemtantion prohibits that ? -- ___________________________________________ Joel Falcou - Assistant Professor PARALL Team - LRI - Universite Paris Sud XI Tel : (+33)1 69 15 66 35

1 0

[thread] lock(Iterator,Iterator) bug?
by strasser＠uni-bremen.de 20 Aug '09

20 Aug '09

according to this point in the library documentation: http://www.boost.org/doc/libs/1_39_0/doc/html/thread/synchronization.html#t… there are, among others, these non-member functions on Boost.Thread: template<typename ForwardIterator> void lock(ForwardIterator begin,ForwardIterator end); template<typename Lockable1,typename Lockable2> void lock(Lockable1& l1,Lockable2& l2); this example: vector<mutex> vec; lock(vec.begin(),vec.end()); fails on gcc 4.3.2, complaining that the vector iterator doesn`t have members named, lock(), unlock(), ... after looking at the source I`m not even sure how this is supposed to work. the implementation seems to try to differentiate between Lockable and ForwardIterator with this and other templates like it: template<typename T> struct has_member_lock{ typedef char true_type; struct false_type{ true_type dummy[2]; }; template<typename U> static true_type has_member(U*,void (U::*dummy)()=&U::lock); static false_type has_member(void*); BOOST_STATIC_CONSTANT(bool, value=sizeof(has_member_lock<T>::has_member((T*)NULL))==sizeof(true_type)); }; it looks like it tries to exploit SFINAE but it does so with a default argument that is not always resolvable. an old discussion on the boost mailing list about a has_member type trait seems to confirm that there is no portable way to do that and at the time only vc++ accepted that kind of code. but the only requirement placed on including this code is: #if defined(BOOST_NO_SFINAE) || \ BOOST_WORKAROUND(__IBMCPP__, BOOST_TESTED_AT(600)) || \ BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x590)) am I missing something?

4 3

Re: [Boost-users] shared_ptr on template class
by hweekuan 20 Aug '09

20 Aug '09

hi i would have done the same. have not try it on my machine though 在 20-Aug-2009 12:21 AM 時，Roman Shmelev <rshmelev(a)gmail.com> 寫到： Probably a bit offtopic, but I do the following when working with templated classes: typedef MyClass<P1> me; typedef boost::shared_ptr<me> pointer; so, later everything will depend on "me", for example: return pointer(new me); Also, this code could be reused when creating other classes. _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

1 0

Re: [Boost-users] [Proto] Building a mpl::vector from an expression
by christophe henry 20 Aug '09

20 Aug '09

Eric Niebler wrote: > #include > #include > #include > #include > #include > #include > namespace proto = boost::proto; > namespace mpl = boost::mpl; > using proto::_; > > namespace My > { > struct my_tag {}; > > template > struct attribute_ > { > BOOST_PROTO_BASIC_EXTENDS( > proto::terminal::type > , attribute_ > , proto::default_domain > ) > }; > > attribute_<> const attribute = {{}}; > > struct BuildAttributes > : proto::make< > mpl::pop_front< > proto::fold_tree< > _ > , mpl::vector0<>() > , mpl::push_back() > > > > > > > {}; > } > > int main() > { > mpl::vector3 x = > My::BuildAttributes()( > My::attribute << int() << std::string() << bool() > ); > } > > HTH, Hi Eric, It does! It is way more elegant than what I came up with. I can even add a few features (like an optional end) inside and it still compiles much faster. Thanks a lot, Christophe _________________________________________________________________ With Windows Live, you can organize, edit, and share your photos. http://www.microsoft.com/middleeast/windows/windowslive/products/photo-gall…

1 0

[boost][thread] synchronization fails - why?
by Alexander Heinrich 20 Aug '09

20 Aug '09

Hi, I've written a small logging class which I use for debugging in a multithreaded environment. I.e. different concurrent (boost) threads may instantiate an object of class logmsg, which amongst other things writes some message to the console. To synchronize the output I lock a global mutex whenever the logmsg constructor is invoked. Unfortunately it simply doesn't work. I still end up with output from different threads being mixed up almost as if there was no synchronization. I write 'almost' because if I remove the locking it's actually getting worse (crazy, huh). I added the code for allocating the console (it's an MFC project), because I believe it could have something to do with it, since the console itself is running in a separate (non-boost) thread. --- FILE* pConsole; boost::mutex consoleMutex; class logmsg { public: logmsg(const void* source, const char* msg, ...); }; logmsg::logmsg(const void* source, const char* msg, ...) { boost::mutex::scoped_lock lock(consoleMutex); if (!pConsole) create_console(); cout << msg << endl; } void create_console() { AllocConsole(); int hConsole = _open_osfhandle( (long)GetStdHandle(STD_OUTPUT_HANDLE), _O_TEXT ); pConsole = _fdopen(hConsole, "w"); setvbuf(pConsole, NULL, _IONBF, 0); //disables buffering *stdout = *pConsole; } --- Best regards, Alex

2 2

can you give me access to the sandbox?
by Chris Hite 20 Aug '09

20 Aug '09

My complete name is Christopher Hite. I currently work at RTS. I'm supposed to fix this: https://svn.boost.org/trac/boost/ticket/3339 I can start with a private checkout and relocate to a sandbox branch when you give me access. Chris

1 0

shared_ptr on template class
by Gao, Yi 20 Aug '09

20 Aug '09

Hi All, //////In short: If I have a templated class A<T>, within it, I want to typedef shared_ptr to it self, should I write: typedef shared_ptr< A<T> > PointerType; or typedef shared_ptr< A > PointerType; ? //////In more detail I have: template< typename T> class A { public: typedef shared_ptr< A<T> > PointerType; // or typedef shared_ptr< A > PointerType; // Further more static PointerType New() { return PointerType(new A<T>); // or return PointerType(new A); } }; Could I know if there's difference in between? Thanks! Yi Gao

4 3

Re: [Boost-users] C1001 ice with date/time and Boost 1.38
by himanshu.agarwal＠rbs.com 20 Aug '09

20 Aug '09

> Dear all, > > I just downloaded Boost 1.38 and got ice with VStudio 2003 and sp1: > > c:\Work Sdk\boost_1_38_0\boost\date_time\gregorian\conversion.hpp(43) : fatal > error C1001: INTERNAL COMPILER ERROR > (compiler file 'msc1.cpp', line 2708) > Please choose the Technical Support command on the Visual C++ > Help menu, or open the Technical Support help file for more > information > > It took me 3 hours to solve but it seems that if the /FR (Include All Browse > Information) is on, this error is generated. Hi I also encountered the same problem, tried this solution. This worked for one of my project, but not for other one. On looking at development code of boost, It appears that they might have solved this in new version Tried that code and it worked Here is the solution: Create a file with name "boost_conversion.h" and contents given below and include it before any boost include in you code boost_conversion.h ____________________________________________________________________________________________________ /* //////////////////////////////////////////////////////////////////////////////////////////// This file is a hack to boost_1_37\boost\date_time\gregorian\conversion.hpp file When boost_1_37\boost\date_time\gregorian\conversion.hpp is compiled under Visual Studio 2003.NET foillowing error appear: fatal error C1001: INTERNAL COMPILER ERROR (compiler file 'msc1.cpp', line 2708) Please choose the Technical Support command on the Visual C++ Help menu, or open the Technical Support help file for more information The same issue is also reported on boost-user group, please refer followin hyperlink: http://archive.netbsd.se/?ml=boost-users&a=2009-02&t=9851835 This issue might solve in boost 1.40 version. This code is modified from boost taking code from development version of boost //////////////////////////////////////////////////////////////////////////////////////////// */ //Enable this file only for VS 2003.NET Compiler #if _MSC_VER >= 1310 and _MSC_VER < 1400 #ifndef _CUSTOM_GREGORIAN__CONVERSION_HPP___ #define _CUSTOM_GREGORIAN__CONVERSION_HPP___ /* Copyright (c) 2004-2005 CrystalClear Software, Inc. * Use, modification and distribution is subject to the * Boost Software License, Version 1.0. (See accompanying * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) * Author: Jeff Garland, Bart Garst * $Date: 2008-02-27 15:00:24 -0500 (Wed, 27 Feb 2008) $ */ #include <exception> #include "boost/date_time/gregorian/gregorian_types.hpp" #include "boost/date_time/c_time.hpp" #if defined(USE_DATE_TIME_PRE_1_33_FACET_IO) # if defined(BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS) # include "boost/date_time/gregorian/formatters_limited.hpp" # else # include "boost/date_time/gregorian/formatters.hpp" # endif // BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS #else # include <sstream> # include "boost/date_time/gregorian/gregorian_io.hpp" #endif // USE_DATE_TIME_PRE_1_33_FACET_IO namespace boost { namespace gregorian { //! Converts a date to a tm struct. Throws out_of_range exception if date is a special value inline std::tm to_tm(const date& d) { if (d.is_special()) { std::string s = "tm unable to handle "; switch (d.as_special()) { case date_time::not_a_date_time: s += "not-a-date-time value"; break; case date_time::neg_infin: s += "-infinity date value"; break; case date_time::pos_infin: s += "+infinity date value"; break; default: s += "a special date value"; break; } boost::throw_exception(std::out_of_range(s)); } std::tm datetm; boost::gregorian::date::ymd_type ymd = d.year_month_day(); datetm.tm_year = ymd.year-1900; datetm.tm_mon = ymd.month-1; datetm.tm_mday = ymd.day; datetm.tm_wday = d.day_of_week(); datetm.tm_yday = d.day_of_year()-1; datetm.tm_hour = datetm.tm_min = datetm.tm_sec = 0; datetm.tm_isdst = -1; // negative because not enough info to set tm_isdst return datetm; } //! Converts a tm structure into a date dropping the any time values. inline date date_from_tm(const std::tm& datetm) { return date(static_cast<unsigned short>(datetm.tm_year+1900), static_cast<unsigned short>(datetm.tm_mon+1), static_cast<unsigned short>(datetm.tm_mday)); } } } //namespace boost::gregorian //this will disable original boost gregorian conversion hpp file #define _GREGORIAN__CONVERSION_HPP___ #endif //_CUSTOM_GREGORIAN__CONVERSION_HPP___ #endif//_MSC_VER >= 1310 and _MSC_VER < 1400 ____________________________________________________________________________________________________ Regards Himanshu Agarwal agarwal.himanshu502(a)gmail.com *********************************************************************************** The Royal Bank of Scotland plc. Registered in Scotland No 90312. Registered Office: 36 St Andrew Square, Edinburgh EH2 2YB. Authorised and regulated by the Financial Services Authority. This e-mail message is confidential and for use by the addressee only. If the message is received by anyone other than the addressee, please return the message to the sender by replying to it and then delete the message from your computer. Internet e-mails are not necessarily secure. The Royal Bank of Scotland plc does not accept responsibility for changes made to this message after it was sent. Whilst all reasonable care has been taken to avoid the transmission of viruses, it is the responsibility of the recipient to ensure that the onward transmission, opening or use of this message and any attachments will not adversely affect its systems or data. No responsibility is accepted by The Royal Bank of Scotland plc in this regard and the recipient should carry out such virus and other checks as it considers appropriate. Visit our website at www.rbs.com ***********************************************************************************

1 0