July 2013 - Boost-users - lists.boost.org

Storing path from A*, using operator::new with boost::multi_array
by Sladey 01 Aug '13

01 Aug '13

I'm trying to use dynamic memory allocation for the first time. I want to allocate memory for a 2 dim dynamic array, to store paths from an A* function. I think the array for the job is boost::multi_array. Problem I have is seem to be able to allocate the memory but i can't change or access any of the elements. #include <iostream> #include "boost/multi_array.hpp" typedef boost::multi_array<int, 2> array_type; int main() { array_type *A = new array_type; A->resize( boost::extents[2][2] ); A[1][1] = 2; std::cout << A[1][1] << std::endl; delete A; return 0; } -- View this message in context: http://boost.2283326.n4.nabble.com/Storing-path-from-A-using-operator-new-w… Sent from the Boost - Users mailing list archive at Nabble.com.

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Boost 1.52 with Cygwin and STLPort 5.2.1
by Akanksh Vashisth 31 Jul '13

31 Jul '13

Hello, I am trying to compile the following source file using gcc on cygwin and stlport: //-------------------------------------- //cygwin_stl.cpp #include <boost/graph/graphviz.hpp> int main() { return 0; } //-------------------------------------- with the following commandline: //-------------------------------------- $ gcc cygwin_stl.cpp -I /cygdrive/y/STLPORT/STLport-5.2.1/stlport/ -I /cygdrive/y/BOOST/boost_1_52_0/ //-------------------------------------- and this is resulting in an assertion inside boost/xpressive/traits/cpp_regex_tratis.hpp at line 74 as: //-------------------------------------- /cygdrive/y/BOOST/boost_1_52_0/boost/xpressive/traits/cpp_regex_traits.hpp:74:9: error: no matching function for call to ‘assertion_failed(mpl_::failed************ mpl_::assert_relation<(mpl_::assert_::relations)1u, -0x000000069l, 2l>::************)’ //-------------------------------------- Complete error message attached. It appears that the boost header has a conditional compilation for __CYGWIN__ where it asserts a property of the STL std::ctype_base headers that come with cygwin. But as I am using STLport, the assertion does not hold true any longer, but I do have the preprocessor macro __CYGWIN__defined. The code in cpp_regex_traits.hpp is as follows: //-------------------------------------- #ifdef __CYGWIN__ // Work around a gcc warning on cygwin template<> struct mask_cast<std::ctype_base::print> { BOOST_MPL_ASSERT_RELATION('\227', ==, std::ctype_base::print); BOOST_STATIC_CONSTANT(umaskex_t, value = 0227); }; #endif //-------------------------------------- I do have __CYGWIN__ as I am on cygwin, but the STL header is coming from STLport, thus the assertion fails. Is there anyway I can work around this issue? or is it a bug in the boost header where it the test for __CYGWIN__ is insufficient? as a third party STL can be used with cygwin, in which case the assertion is invalid. Thanks

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[FileSystem] detect whether a path has a termi9nating separator
by Sean Farrow 31 Jul '13

31 Jul '13

Hi all, Firstly I apologise for the lameness of the question-or if I'm missing something really obvious but, is there a function in boost filesystem or on the path object to terminate the path with a separator if one doesn't exist? Help/pointers appreciated. Regards Sean.

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compiling with -std=c++0x option
by Norman Lo 31 Jul '13

31 Jul '13

Hello, I am trying to compile a source file that utilizes boost::multi_array. When I try to compile the file with the option -std=c++0x, I get the following error: /apps/boost_1_48/include/boost/multi_array/extent_gen.hpp(62): error: class "boost::detail::multi_array::extent_gen<2UL>" has no suitable copy constructor return extent_gen<NumRanges+1>(*this,range(0,idx)); ^ detected during instantiation of "boost::detail::multi_array::extent_gen<<expression>> boost::detail::multi_array::extent_gen<NumRanges>::operator[](boost::detail::multi_array::index={ptrdiff_t={long}}) [with NumRanges=1UL]" at line 48 of When I compile the same source file without -std=c++0x option, it compiles fine. The compiler I am using: icpc 12.1.0 gcc version: 4.5.0 boost version 1_48 Any help is greatly appreciated. Thanks! Norman

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Deserializing Boost archives using C#
by Robert Fairlie 30 Jul '13

30 Jul '13

Hi, I'm currently writing a component in C++ which creates a hierarchy of objects, and serializes them using the Boost serialization library. The serialized archive consists of a root "Document" object, which consists of an STL vector of "Pages". Each page consists of an STL vector of other object types, which themselves have sub-objects. The platform is Microsoft Windows. At some time in the future I want to port the component to C#. One option would be to call the Boost library from C# using interop, but I'd rather try to code it completely in C#, as that would bring a lot of portability benefits. What I'd ideally like to do therefore is in the future to deserialize with C# any files currently being saved with C++. Since Boost provides XML archives I thought I'd look at changing from my current text archives to XML archives. That was straightforward and I'm now saving to XML archives. I'm now starting to look at whether it possible to deserialize an XML archive using C#, possibly by writing a skeleton test component in C#. I'm pretty familiar with C#, but not XML serialization in C#, so I'm not sure yet how to map the XML elements (and class ids ?) to C# objects. In the meantime I was wondering if any one has done anything like this or had any thoughts on whether this approach is feasible? Thanks for any advice, Robert Fairlie -- View this message in context: http://boost.2283326.n4.nabble.com/Deserializing-Boost-archives-using-C-tp4… Sent from the Boost - Users mailing list archive at Nabble.com.

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[Boost.Log] compiling issue of trivial example under boost version 1.5.4
by Steven Sun 30 Jul '13

30 Jul '13

Hi All - I was trying to compile the boost log example code under boost_1_54_0/libs/log/example/trivial/. I basically want to have a simple logger with filter function. So the example code serves the purpose. I got the attached error message while trying to compile. I think my compile command is fine because if I comment out the section of " core::get()->set_filter ( trivial::severity >= trivial::info ); " it compiles and runs fine. Can someone please provide some insight of how to make the severity filter work? Best, -- Steven Sun ********************************************************* Eco-Tips: Please consider the environment before printing this email!

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[datetime] to/from ISO
by Michael Powell 30 Jul '13

30 Jul '13

Hello, I have a cross platform date/time quirk I want to work out. I am using Boost DateTime Posix to_iso_string and from_iso_string to pass date/time fields over the wire. What I am finding is that C# .NET DateTime and/or Boost DateTime Posix ISO do not agree, at least where ISO format is concerned. So... Is it a Boost issue? Or a .NET issue? I'm not positive, but the ISO format goes something like this: "YYYY-mm-DDTHH:MM:SS" Whereas Boost interpretation of that is something like: "YYYYmmDDT..." Something else after 'T', not sure, is that seconds since the epoch? Something like that. Anyway. Parsing the tree is falling over on that interpretation. A workaround is to leave the field out (for now), but longer term I would like to preserve the time field in whatever date/time format will work and parse ubiquitously over the wire. Any recommendations? Thank you... Regards, Michael Powell

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[Spirit][Math] karma: regression in 1.54 due to argument promotion in math?
by Igor R 30 Jul '13

30 Jul '13

Hello, The following code compiles with 1.53, but fails with 1.54 (FreeBSD 9.1, gcc4.2.1): #include <boost/spirit/include/karma.hpp> #include <string> #include <iterator> int main() { using namespace boost::spirit::karma; std::string result; std::back_insert_iterator sink(result); unsigned short a; generate(sink, auto_, a); } The error is: boost/boost/math/tools/promotion.hpp: In instantiation of 'boost::math::tools::promote_args<long double, float, float, float, float, float>': boost/boost/math/special_functions/sign.hpp:114: instantiated from 'int boost::math::signbit(T) [with T = long double]' boost/boost/spirit/home/support/detail/sign.hpp:47: instantiated from 'bool boost::spirit::detail::signbit(T) [with T = long double]' boost/boost/spirit/home/karma/numeric/detail/numeric_utils.hpp:130: instantiated from here boost/boost/math/tools/promotion.hpp:141: error: invalid application of 'sizeof' to incomplete type 'boost::STATIC_ASSERTION_FAILURE<false>' I.e., the compilation fails because FreeBSD doesn't supprt "long double" type. This happens now due to the following changes in boost/math/special_functions/sign.hpp : 123 template<class T> int (signbit)(T x) 124 { 125 typedef typename detail::fp_traits<T>::type traits; 126 typedef typename traits::method method; 127 - typedef typename boost::is_floating_point<T>::type fp_tag; 128 - return detail::signbit_impl(x, method()); 127 + // typedef typename boost::is_floating_point<T>::type fp_tag; 128 + typedef typename tools::promote_args<T>::type result_type; 129 + return detail::signbit_impl(static_cast<result_type>(x), method()); 130 } So, what would be the right way to reconcile karma and math? Thanks, Igor'.

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interprocess file_lock timed_lock not returning false after timeout
by Claudio Bantaloukas 30 Jul '13

30 Jul '13

Hi all! I think there are two issues, one is a documentation issue, the other might be a bug with boost::interprocess file_lock. The documentation issue is that it was not clear to me by reading the documentation on file_lock that it is a RAII-style class. By reading that it has process lifetime, I assumed that once acquired, the lock would be held even after the file_lock object is destroyed. Once I figured this out, I changed the file_lock to a static method variable and ran into the following issue. I have two processes that use the following class method that I wrote. They both try to acquire a lock on the same file and the lock must be held until the process exits. When I start the first process, it acquires the lock correctly. When I start up the second process, I would expect the following code to return false after 10 seconds //// static boost::interprocess::file_lock process_flock(processLockFile.string().c_str()); if (!process_flock.timed_lock(wait_until)){ //// However, when I read through the logs, I see that the process reaches the timed_lock call and gets stuck there. Can you please help me diagnose this? I'm attaching the entire method with log lines treated for brevity. Boost version is 1.53, running on Centos 6. Thanks! ------------------------8<-------------- ReturnStatus ProcessLocker::lockViaFile() { L_CONTEXT("ProcessLocker::lockViaFile()"); path lockDirectory(lockFileDirectoryName); if (!exists(lockDirectory)){ L_ERROR("missing lock directory"); return r_error; } if (!is_directory(lockDirectory)){ L_ERROR("lock path is not a directory"); return r_error; } path globalLockFile = lockDirectory / "general-locking.lock"; // make sure file exists boost::filesystem::ofstream globalfile(globalLockFile, std::ios::out); // we do nothing with it... globalfile.close(); std::string filename; // class member, this is the process identifier, and is the same between invocations filename.append(identifier); filename.append(".lock"); path processLockFile = lockDirectory / filename; // make sure file exists boost::filesystem::ofstream processfile(processLockFile, std::ios::out); // we do nothing with it... processfile.close(); try { ptime now(second_clock::local_time()); ptime wait_until = now +seconds(10); L_DEBUG("Waiting for global lock until " << wait_until); boost::interprocess::file_lock global_flock(globalLockFile.string().c_str()); if (!global_flock.timed_lock(wait_until)){ L_ERROR("Cannot create global lock"); return r_error; } try { L_DEBUG("Waiting for process lock until " << wait_until); static boost::interprocess::file_lock process_flock(processLockFile.string().c_str()); if (!process_flock.timed_lock(wait_until)){ global_flock.unlock(); // this point is never reached!? L_ERROR("Cannot create process lock"); return r_error; } global_flock.unlock(); L_DEBUG("Obtained process lock, freeing global lock"); return r_ok; } catch (std::exception& e){ global_flock.unlock(); L_ERROR("Cannot create process lock, freeing global lock"); return r_error; } } catch (std::exception& e){ L_ERROR("Cannot create global lock"); return r_error; } } -- Claudio Bantaloukas

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serialization of standard unordered containers
by D. R. Evans 29 Jul '13

29 Jul '13

I have a several classes that currently use old-fashioned ("ordered") containers that would benefit greatly from using the C++11 unordered variants. But in the version of boost I'm currently using (1.49.0) serialization of those containers is not supported. So I have some questions: 1. Is serialization of standard unordered containers supported in version 1.54.0 of the boost libraries? 2a. If so, what was the earliest version of the boost libraries that supported serialization of standard unordered containers? 2b. If not, is there a timetable for when this might be added? (The documentation and comments I could find gave completely inconsistent answers on this issue, so I'd like a definitive answer before I go to the trouble of installing a more recent version of boost if that's not going to help.) Doc -- Web: http://www.sff.net/people/N7DR

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[move] Where is it? when to use it?
by Michael Powell 29 Jul '13

29 Jul '13

Hello, Okay, this is kind of a Boost question, and kind of not. Kind of a C++ question, and kind of not. Depends where I can find a workable solution. First, I am using Sourcery CodeBench in a more recent (not the most recent) version. I believe it is one revision back from most recent. Targeting (Arch)Linux/ARM. I believe I answered my question from online references: http://en.cppreference.com/w/cpp/utility/move, which I've also confirmed is a C++0x experimental feature in the version of CodeBench I am using. It may be more or less up to date when I upgrade to the latest CodeBench. If the experimental doesn't work out, is there a Boost alternative? If so, where do I include it? Thank you... Regards, Michael Powell

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[asio] reconnect without close the socket, is it possible?
by TONGARI J 28 Jul '13

28 Jul '13

Hi, I want to know if the connection is broken up at some point, can I reconnect without shutdown-close the socket. On Windows, I keep getting already_connected error when reconnecting but still fails to do other async read/write... Also, any way to test if the socket is connected? Thanks.

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Re: [Boost-users] serialization of standard unordered containers
by Brian Wood 28 Jul '13

28 Jul '13

niXman writes: > 2013/7/27 D. R. Evans: >> 1. Is serialization of standard unordered containers supported in version >>1.54.0 of the boost libraries? >No. > > Alternatively, look at the YAS: > https://github.com/niXman/yas The C++ Middleware Writer - http://webEbenezer.net has support for the standard unordered containers. -- Brian Wood Ebenezer Enterprises http://webEbenezer.net

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find positions of punctuations with boost regex
by chenyong 27 Jul '13

27 Jul '13

I am trying to find ALL positions of punctuations in a textual string so that I can divide the text into sentence. How to do this with boost regex. Thanks Felix

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[asio] Async (or sync) in threads
by Michael Powell 27 Jul '13

27 Jul '13

Hello, I am having a hard time getting my Asio usage off the ground. I started with what I thought was a nominal (knock on wood) asynchronous server, which runs in a worker thread, but was running into seg fault issues. In the interest of "simplifying" the issue, I decided to simplify to a "blocking" server, hopefully also hosted in a thread, but am also running into seg fault issues. First I am trying to capture the server instance in a lambda passing it to a thread as a runner. Then I am trying to capture a shared pointer to the server thinking there is some move semantic or something. Seg fault in either case. Most of the examples are one main being the sole main thread hosting the io_service. Would that this were the case with me. This has to be one worker among several other workers running in the same process. Wouldn't mind if there were a couple of ideas recommending what I might explore next. Thank you... In the diagnostic routine I've got wired up: boost::shared_ptr<dchem::asio::ip::tcp::server2> server_ = boost::make_shared<dchem::asio::ip::tcp::server2>(17017); boost::thread runner_([&server_]() { server_->start_server(); }); runner_.start_thread(); while (!timer_.has_elapsed_query_wait(wait_timeout_, elapsed_milliseconds_)) { //... } runner_.interrupt(); runner_.join(); And the server itself, header first: class server2 { public: /** * \brief Endpoint type definition. */ typedef boost::asio::ip::tcp::endpoint endpoint_type; /** * \brief Acceptor type definition. */ typedef boost::asio::ip::tcp::acceptor acceptor_type; /** * \brief Service type definition. */ typedef boost::asio::io_service service_type; /** * \brief Socket type definition. */ typedef boost::asio::ip::tcp::socket socket_type; /** * \brief Socket pointer type definition. */ typedef boost::shared_ptr<socket_type> socket_pointer; /** * \brief Port type definition. */ typedef unsigned int port_type; protected: /** * \brief Returns whether bytes are available. * \param s A socket reference. */ static bool are_bytes_readable(socket_type& s); /** * \brief Starts a new session. * \param s Starts running a new session. */ void session(socket_pointer s); public: /** * \brief Constructor * \param port A TCP port. */ server2(port_type port); /** * \brief Destructor */ virtual ~server2(); /** * \brief Starts the server. */ void start_server(); private: /** * \brief Service. */ service_type m_service; /** * \brief Port. */ port_type m_port; }; ///////////////////////////////////////////////////////////////////// server2::server2(port_type port) : m_service(), m_port(port) { } ///////////////////////////////////////////////////////////////////// server2::~server2() { } ///////////////////////////////////////////////////////////////////// bool server2::are_bytes_readable(socket_type& s) { boost::asio::socket_base::bytes_readable cmd_(true); s.io_control(cmd_); std::size_t cmd_result_ = cmd_.get(); return cmd_result_ > 0; } ///////////////////////////////////////////////////////////////////// void server2::start_server() { try { endpoint_type ep_(boost::asio::ip::tcp::v4(), m_port); acceptor_type a_(m_service, ep_); std::cout << "accepting connection" << std::endl; boost::system::error_code ec_; auto s_ = boost::make_shared<socket_type>(m_service); a_.accept((*s_), ec_); if (!ec_) return; std::cout << "starting session" << std::endl; session(s_); } catch (boost::thread_interrupted& tiex) { } catch (...) { } } ///////////////////////////////////////////////////////////////////// void server2::session(socket_pointer s) { auto& s_ = (*s); while (true) { { utils::sleep_for_milliseconds(100); threading::thread_interruption_disabler tid; std::cout << "are bytes readable" << std::endl; if (!are_bytes_readable(s_)) continue; std::cout << "reading some" << std::endl; boost::system::error_code ec_; std::vector<byte> buffer_; size_t length_ = s_.read_some(boost::asio::buffer(buffer_), ec_); //Connection reset cleanly by peer. if (ec_ == boost::asio::error::eof) break; else if (ec_) //Some other error. throw boost::system::system_error(ec_); boost::asio::write(s_, boost::asio::buffer(buffer_, length_)); } } } Regards, Michael Powell

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shared_ptr problem
by Tim Burgess 26 Jul '13

26 Jul '13

Hi, I'm developing an application for Windows and Mac. My source compiles and links fine, but I'm having a problem when building the code on the Mac (OSX 10.8 Mountain Lion, Xcode 4.6 using GCC). The contents of the Issue Navigator are shown below: SurfaceReader Group /Users/tim/developer/libraries/boost_1_54_0/boost/smart_ptr/make_shared_obje ct.hpp /Users/tim/developer/libraries/boost_1_54_0/boost/smart_ptr/make_shared_obje ct.hpp:711: error: no matching function for call to 'AppConfig::AppConfig(const boost::shared_ptr<AppConfig>&)' /Users/tim/developer/libraries/boost_1_54_0/boost/smart_ptr/make_shared_obje ct.hpp:711: error: no matching function for call to 'SurfaceProtocol::SurfaceProtocol(const boost::shared_ptr<SurfaceProtocol>&)' /Users/tim/developer/libraries/boost_1_54_0/boost/smart_ptr/make_shared_obje ct.hpp:711: error: no matching function for call to 'RBSpeech::RBSpeech(const boost::shared_ptr<RBSpeech>&)' I'm using shared_ptr in about half the modules in my application and, given that the above output doesn't refer to compilation errors in particular modules of mine, I'm confused as to how to track this issue down. Obviously, the issue has something to do with the constructors for my AppConfig, SurfaceProtocol and RBSpeech classes, but these don't cause any problems under Windows/VS2010 and only the RBSpeech class has any Mac-specific code blocks. Can anybody advise me how to proceed, please? Best wishes. Tim Burgess Raised Bar Ltd. T: 01827 719822 M: 07989 486976 W: http://www.raisedbar.net

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[iostreams] Some basic questions about filtering_stream
by Stephen Greenfield 25 Jul '13

25 Jul '13

Some basic questions about Boost filtering_streams. I have dozens of functions that presently take a parameter of std::ofstream&. For example: void foo(std::ofstream& outStream) { // lots of operations, like this: outStream << "various bits of text"; } Which then get used as thus: void StreamSomeTextToFile(char* fileName) { ofstream myFileStream(fileName, ios::out | ios::app | ios::binary); foo(myFileStream); myFileStream.close(); } Now I'd like to use the boost filtering_stream to output to a compressed ZIP file. I've compiled, linked and run the commonly cited boost filtering_stream test code for packing and unpacking and it worked perfectly for me. Now I'd like to try to substitute my use of std::ofstream& with the filtering_stream: void StreamSomeCompressedTextToFile(char* fileName) { ofstream myFileStream(destPath, std::ios_base::out | std::ios_base::app | std::ios_base::binary); boost::iostreams::filtering_streambuf<boost::iostreams::output> myCompressedFileStream; myCompressedFileStream.push(boost::iostreams::zlib_compressor()); myCompressedFileStream.push(myFileStream); foo(myCompressedFileStream); // I can't just pass myCompressedFileStream to foo(std::ofstream&), right? myFileStream.close(); } THREE QUESTIONS: 1) Do all my functions that previously accepted std::ofstream& outStream need to now accept a parameter of type boost::iostreams::filtering_streambuf<boost::iostreams::output>& ? Or, is there a proper parameter type so those numerous ("foo") functions could work with EITHER type of stream type? 2) In my simple test cases, I was not able to use stream operator syntax with the filtering_streambuf: myCompressedFileStream << "some text"; this generated the the error: no match for 'operator<<'. I similarly had compile errors with write(): `error: 'class boost::iostreams::filtering_streambuf<boost::iostreams::output, char, std::char_traits<char>, std::allocator<char>, boost::iostreams::public_>' has no member named 'write`' Could this be a missing header? If so, I haven't been able to determine which one. 3) In the common test case example code (below), I was confused that I could not locate the file "hello.z" after it had been created. The unpack code (also below) executed correctly and clearly references the created file -- so where can it be found? void pack() { std::ofstream file("hello.z", std::ios_base::out | std::ios_base::binary); boost::iostreams::filtering_streambuf<boost::iostreams::output> out; out.push(boost::iostreams::zlib_compressor()); out.push(file); char data[5] = {'a', 'b', 'c', 'd', 'e'}; boost::iostreams::copy(boost::iostreams::basic_array_source<char>(data, sizeof(data)), out); file.close(); } void unpack() { std::fstream file("hello.z", std::ios_base::in | std::ios_base::binary); boost::iostreams::filtering_streambuf<boost::iostreams::input> in; in.push(boost::iostreams::zlib_decompressor()); in.push(file); boost::iostreams::copy(in, std::cout); } My code is being developed on XCode 3.2.6, GNU 4.0, Mac OS X 10.6.8

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[multiprecision] serialization support?
by Neal Becker 25 Jul '13

25 Jul '13

Does/will multiprecesion have support for boost::serialization?

2 1

[MultiIndex] How to extract a key-extractor?
by Igor R 25 Jul '13

25 Jul '13

Hello, The following code is expected to get the key-extractor, but it doesn't compile. How to do this correctly? Thanks. #include <boost/multi_index_container.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/mem_fun.hpp> struct A { int f() const { return 0; } }; typedef boost::multi_index::multi_index_container< int, boost::multi_index::indexed_by< boost::multi_index::ordered_unique< boost::multi_index::const_mem_fun<A, int, &A::f> > > > container_type; typedef container_type::key_from_value_type extractor_type; // doesn't compile typedef container_type::nth_index<0>::key_from_value_type extractor_type; // doesn't compile

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multiprecision int - convert to floating type
by Neal Becker 25 Jul '13

25 Jul '13

Any suggestion how to convert a mp int (e.g., int128_t) to a float type (e.g., double)?

2 1

Problems compiling on Windows......
by Marcus MacWilliam 24 Jul '13

24 Jul '13

Hello, I am a boost newbie, and this is my first post :-) I am inserting boost into my application using pre-compiled headers on Windows. The pre-compiled header looks like this: #ifndef PRECOMPILEDHEADERS_WINRT_SRC_MAIN_INCLUDE_PRE_COMPILED_H_ #define PRECOMPILEDHEADERS_WINRT_SRC_MAIN_INCLUDE_PRE_COMPILED_H_ // Standard integer types #include <stdint.h> // Includes for d2d libraries #include <wrl.h> #include <d3d11_1.h> #include <d2d1_1.h> #include <d2d1effects.h> #include <d2d1_1helper.h> #include <dwrite_1.h> #include <wincodec.h> #include <math.h> #include <agile.h> // Includes for STL types #include <string> #include <vector> #include <set> #include <map> #include <memory> #include <exception> #include <collection.h> // Includes for Windows error #include <winerror.h> // Includes for Boost libraries #include "boost/exception/all.hpp" #include "boost/optional.hpp" #include "boost/variant.hpp" #include "boost/exception_ptr.hpp" #include "boost/date_time/posix_time/posix_time_types.hpp" #include "boost/archive/text_oarchive.hpp" #include "boost/archive/text_iarchive.hpp" #include "boost/serialization/access.hpp" #include "boost/serialization/vector.hpp" #include "boost/serialization/string.hpp" // Includes for devices communications #include "boost/interprocess/sync/named_mutex.hpp" #include "boost/interprocess/sync/scoped_lock.hpp" #include "boost/archive/binary_oarchive.hpp" #include "boost/archive/binary_iarchive.hpp" #endif // PRECOMPILEDHEADERS_WINRT_SRC_MAIN_INCLUDE_PRE_COMPILED_H_ However when I attempt to compile this through maven, using the maven-nar-plugin, on a Windows 8 machine, I get the following error: [INFO] --- maven-nar-plugin:2.25:nar-compile (default-nar-compile) @ precompiledheaders-winrt --- [INFO] Compiling 1 native files [INFO] Looking for WinRT dependencies [ERROR] C:\Users\marcusma\Source\1edit-prism\precompiledheaders\winrt\external-sources\boost/interprocess/detail/os_file _functions.hpp(94) : error C2039: 'getenv' : is not a member of 'std' [ERROR] C:\Users\marcusma\Source\1edit-prism\precompiledheaders\winrt\external-sources\boost/interprocess/detail/os_file _functions.hpp(94) : error C3861: 'getenv': identifier not found This appears to be correct, getenv according to the MSDN documentation is not available when compiling code for WinRT, using Visual Studio 12, on a Windows 8 machine. I understood that boost was supposed to be multi-platform, so why is std::getenv being used, which is not available for Windows? Can someone suggest what I need to do to get my pre-compiled headers to compile. Cheers, -- Marcus A.T MacWilliam, Senior Software Engineer. 1Spatial Ltd. Tel: +44 (0)1223 420414, ext 2289, Mob: +44 (0)7803 706597. E-Mail: marcus.macwilliam(a)1spatial.com Skype:marcus.macwilliam Tennyson House, 7 Cambridge Business Park, Cambridge, CB4 0WZ. Registered in England No. 4785688, VAT Reg. No. 135539408. Website: http://www.1spatial.com/ E-mail: info(a)1spatial.com

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Boost for Windows
by Haroogan 24 Jul '13

24 Jul '13

Hello fellows, Boost for Windows <https://bitbucket.org/Haroogan/boost-for-windows> has just been updated. It features the latest Boost (1.54.0) binaries for the latest MinGW-w64 (4.8.1). Note that SJLJ variants are not present as they seem to lose popularity these days. Nevertheless, if someone urgently needs SJLJ builds, just let me know. Finally, the guide on building Boost was updated too. Kind regards, Haroogan

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Persistent graphs with boost::graph
by Maurizio Vitale 24 Jul '13

24 Jul '13

Hello boost-users, is anybody aware of a library for building persistent graphs (graphs that allow access to a certain number of previous versions of the graph) on top of boost::graph? I don't really need access to versions after every modification, but rather I consider a new version as obtained by a set of modifications that are committed as a vlock, database style. I'm interested in large graphs, so memory sharing across versions is critical. Changes between versions are minimal (few nodes/edges in graphs with O(1M) nodes each with very few edges) Thanks, Maurizio

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Can't get boost log example to link
by Jarrett Chisholm 24 Jul '13

24 Jul '13

hey all I'm having trouble getting this simple boost log example to link: #include <boost/log/trivial.hpp> int main(int, char*[]) { BOOST_LOG_TRIVIAL(trace) << " a trace message "; } I can compile it ok, but linking causes the below issues: g++ -o build/main.o -c -std=c++11 -Wall -g -O0 src/main.cpp g++ -o build/test build/main.o -lboost_log -lboost_log_setup -lboost_date_time -lboost_thread -lboost_wave -lboost_regex -lboost_program_options -lboost_system -lboost_filesystem -lpthread build/main.o: In function `main': /home/jarrett/projects/chisholmsoft/logtest/src/main.cpp:5: undefined reference to `boost::log::v2s_mt_posix::trivial::logger::get()' /home/jarrett/projects/chisholmsoft/logtest/src/main.cpp:5: undefined reference to `boost::log::v2s_mt_posix::trivial::logger::get()' build/main.o: In function `boost::log::v2s_mt_posix::record::reset()': /usr/local/include/boost/log/core/record.hpp:153: undefined reference to `boost::log::v2s_mt_posix::record_view::public_data::destroy(boost::log::v2s_mt_posix::record_view::public_data const*)' build/main.o: In function `boost::log::v2s_mt_posix::record boost::log::v2s_mt_posix::sources::basic_composite_logger<char, boost::log::v2s_mt_posix::sources::severity_logger_mt<boost::log::v2s_mt_posix::trivial::severity_level>, boost::log::v2s_mt_posix::sources::multi_thread_model<boost::log::v2s_mt_posix::aux::light_rw_mutex>, boost::log::v2s_mt_posix::sources::features<boost::log::v2s_mt_posix::sources::severity<boost::log::v2s_mt_posix::trivial::severity_level> > >::open_record<boost::parameter::aux::tagged_argument<boost::log::v2s_mt_posix::keywords::tag::severity, boost::log::v2s_mt_posix::trivial::severity_level const> >(boost::parameter::aux::tagged_argument<boost::log::v2s_mt_posix::keywords::tag::severity, boost::log::v2s_mt_posix::trivial::severity_level const> const&)': /usr/local/include/boost/log/sources/basic_logger.hpp:457: undefined reference to `boost::log::v2s_mt_posix::core::get_logging_enabled() const' build/main.o: In function `boost::log::v2s_mt_posix::aux::record_pump<boost::log::v2s_mt_posix::sources::severity_logger_mt<boost::log::v2s_mt_posix::trivial::severity_level> >::~record_pump()': /usr/local/include/boost/log/sources/record_ostream.hpp:278: undefined reference to `boost::log::v2s_mt_posix::aux::unhandled_exception_count()' build/main.o: In function `boost::log::v2s_mt_posix::aux::record_pump<boost::log::v2s_mt_posix::sources::severity_logger_mt<boost::log::v2s_mt_posix::trivial::severity_level> >::record_pump(boost::log::v2s_mt_posix::sources::severity_logger_mt<boost::log::v2s_mt_posix::trivial::severity_level>&, boost::log::v2s_mt_posix::record&)': /usr/local/include/boost/log/sources/record_ostream.hpp:259: undefined reference to `boost::log::v2s_mt_posix::aux::stream_provider<char>::allocate_compound(boost::log::v2s_mt_posix::record&)' /usr/local/include/boost/log/sources/record_ostream.hpp:259: undefined reference to `boost::log::v2s_mt_posix::aux::unhandled_exception_count()' build/main.o: In function `boost::log::v2s_mt_posix::aux::record_pump<boost::log::v2s_mt_posix::sources::severity_logger_mt<boost::log::v2s_mt_posix::trivial::severity_level> >::auto_release::~auto_release()': /usr/local/include/boost/log/sources/record_ostream.hpp:243: undefined reference to `boost::log::v2s_mt_posix::aux::stream_provider<char>::release_compound(boost::log::v2s_mt_posix::aux::stream_provider<char>::stream_compound*)' build/main.o: In function `boost::log::v2s_mt_posix::sources::aux::severity_level<boost::log::v2s_mt_posix::trivial::severity_level>::set_value(boost::log::v2s_mt_posix::trivial::severity_level)': /usr/local/include/boost/log/sources/severity_feature.hpp:135: undefined reference to `boost::log::v2s_mt_posix::sources::aux::get_severity_level()' build/main.o: In function `boost::log::v2s_mt_posix::record boost::log::v2s_mt_posix::sources::basic_logger<char, boost::log::v2s_mt_posix::sources::severity_logger_mt<boost::log::v2s_mt_posix::trivial::severity_level>, boost::log::v2s_mt_posix::sources::multi_thread_model<boost::log::v2s_mt_posix::aux::light_rw_mutex> >::open_record_unlocked<boost::parameter::aux::tagged_argument<boost::log::v2s_mt_posix::keywords::tag::severity, boost::log::v2s_mt_posix::trivial::severity_level const> >(boost::parameter::aux::tagged_argument<boost::log::v2s_mt_posix::keywords::tag::severity, boost::log::v2s_mt_posix::trivial::severity_level const> const&)': /usr/local/include/boost/log/sources/basic_logger.hpp:260: undefined reference to `boost::log::v2s_mt_posix::core::open_record(boost::log::v2s_mt_posix::attribute_set const&)' build/main.o: In function `boost::log::v2s_mt_posix::core::push_record(boost::log::v2s_mt_posix::record&&)': /usr/local/include/boost/log/core/core.hpp:308: undefined reference to `boost::log::v2s_mt_posix::core::push_record_move(boost::log::v2s_mt_posix::record&)' collect2: error: ld returned 1 exit status I using the latest boost-trunk code from svn on Debian 7 Stable 64bit. Anyone have any ideas? Cheers Jarrett

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regex icu library (thread safety)
by PingShan Li 24 Jul '13

24 Jul '13

I need to build boost regex library with ICU support. I followed instruction in: http://www.boost.org/doc/libs/1_46_1/libs/regex/doc/html/boost_regex/instal… First I downloaded ICU library and compiled it without any problem. Then I ran the following command: cd /opt/third_party_libraries/boost_1_46_1/libs/regex/build/ (Boost source code is in "/opt/third_party_libraries/boost_1_46_1") [root@pli-dc-build build]# /opt/third_party_libraries/boost_1_46_1/bjam include=/usr/local/ --toolset=gcc install Performing configuration checks - has_icu builds : yes ...patience... ... ... gcc.compile.c++ ../../../bin.v2/libs/regex/build/gcc-3.4.6/debug/usinstances.o gcc.link.dll ../../../bin.v2/libs/regex/build/gcc-3.4.6/debug/libboost_regex.so.1.46.1 common.copy /opt/third_party_libraries/boost_1_46_1/lib/libboost_regex.so.1.46.1 ln-UNIX /opt/third_party_libraries/boost_1_46_1/lib/libboost_regex.so ln-UNIX /opt/third_party_libraries/boost_1_46_1/lib/libboost_regex.so.1 ln-UNIX /opt/third_party_libraries/boost_1_46_1/lib/libboost_regex.so.1.46 ...updated 22 targets... The build process is successful and I can find the library in "/opt/third_party_libraries/boost_1_46_1/lib/libboost_regex.so.1.46.1". The question is: does this library support multiple threads? I did some research on this topic, it seems like even though the name does not contain "mt", it is actually thread safe. Or do I have to pass extra parameter to generate thread safe version? The normal boost build process generates regex library with name like: libboost_regex-gcc34-mt-1_46_1.so.1.46.1 (http://www.boost.org/doc/libs/1_46_1/more/getting_started/unix-variants.html) From the name, I know if the library supports multiple threads. My development box: uname -a Linux 2.6.18-308.1.1.el5PAE #1 SMP Wed Mar 7 04:57:46 EST 2012 i686 i686 i386 GNU/Linux gcc --version gcc (GCC) 3.4.6 20060404 (Red Hat 3.4.6-4.1) Copyright (C) 2006 Free Software Foundation, Inc. Thanks

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