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boost serialisation 1.56, why does library version change, when no change in library ?
by avib369 . 16 Oct '14

16 Oct '14

At boost 1.53 the library version was 10, however at boost 1.56 it has jumped to 11. I have not seen any documentation/release notes about boost serialisation changes. What has changed in boost serialisation to merit this change ? The documentation in $BOOST_ROOT/libs/serialization/basic_archive.cpp describes the changes to boost library version, however it does *not* describe why it jumped from 10 -> 11. Any help appreciated. Ta, Avi

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[thread] linux.hpp, BOOST_HAS_PTHREAD_YIELD, BOOST_HAS_SCHED_YIELD
by Rob Conde 16 Oct '14

16 Oct '14

Using boost 1.55, Ubuntu 12.04, gcc 4.6 I'm building boost on linux using the lsb sdk. I was getting the failure (paraphrased): pthread_yield not declared in libs/thread/src/thread.cpp 513 The documentation for pthread_yield (http://man7.org/linux/man-pages/man3/pthread_yield.3.html) says: This call is nonstandard, but present on several other systems. Use the standardized sched_yield(2)<http://man7.org/linux/man-pages/man2/sched_yield.2.html> instead. If I change boost/config/platform/linux.hpp to define BOOST_HAS_SCHED_YIELD instead of BOOST_HAS_PTHREAD_YIELD Then sched_yield is used instead and the build finishes properly. I'm posting this for two reasons: 1. To help others running into the same issue 2. To question whether linux.hpp should be updated officially as I did above 3. If not, why Thanks, Rob Conde

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Boost.Python: Polymorphism downcasting
by Christoff Kok 16 Oct '14

16 Oct '14

Hi, I have a list of base classes in C++, I want to access them in Python as a list of their derived most classes. Is there a build in means to cater for this in Boost.Python? I've made an example the problem I ma facing: // ------------------------------- Code ----------------------------------// #include<memory> #include<iostream> #include<vector> namespace boost { template<class T> T* get_pointer(std::shared_ptr<T>& p){ return p.get(); }} struct Vehicle{ virtual ~Vehicle(){} friend bool operator==(const Vehicle& lhs, const Vehicle& rhs) { return true; }}; struct Boat: public Vehicle{ virtual ~Boat(){} friend bool operator==(const Boat& lhs, const Boat& rhs) { return true; } char const* testBoatSpecificMethod() { return "Floating."; } }; struct Truck: public Vehicle{ virtual ~Truck(){} friend bool operator==(const Truck& lhs, const Truck& rhs) { return true; } char const* testTruckSpecificMethod() { return "Trucking."; } }; class Garage { public: Garage() {}; ~Garage() {}; char const* test() { std::string temp = "Vehicle List Size: " + std::to_string(m_VehicleList.size()); return temp.c_str(); } friend bool operator==(const Garage& lhs, const Garage& rhs) { return true; } std::vector<Vehicle>& vehicleList() { return m_VehicleList; } private: std::vector<Vehicle> m_VehicleList; }; #include <boost/python.hpp> #include <boost/python/suite/indexing/vector_indexing_suite.hpp> BOOST_PYTHON_MODULE(garage_ext) { using namespace boost::python; class_<Garage>("Garage") .def("test", &Garage::test) .def("vehicleList", &Garage::vehicleList, return_internal_reference<1>()); class_<Vehicle,std::shared_ptr<Vehicle>>("Vehicle"); class_<Boat,std::shared_ptr<Boat>,bases<Vehicle>>("Boat") .def("testBoatSpecificMethod", &Boat::testBoatSpecificMethod); class_<Truck,std::shared_ptr<Truck>,bases<Vehicle>>("Truck") .def("testTruckSpecificMethod", &Truck::testTruckSpecificMethod); implicitly_convertible<std::shared_ptr<Boat>,std::shared_ptr<Vehicle>>(); implicitly_convertible<std::shared_ptr<Truck>,std::shared_ptr<Vehicle>>(); class_<std::vector<Vehicle> >("stl_vector_Vehicle") .def(vector_indexing_suite<std::vector<Vehicle> >()); } // --------------------------- Test Script -------------------------------// import garage_ext g = garage_ext.Garage() l = g.vehicleList() l.append(garage_ext.Boat()) print "Expecting a Boat object:" print str(l[0]) print g.vehicleList()[0].testBoatSpecificMethod() garage_ext.f2("Done.") // ------------------------------ Output ---------------------------------// Expecting a Boat object <garage_ext.Vehicle object at 0x7fb17a3bfb50> Traceback (most recent call last): File "test_garage.py", line 7, in <module> print g.vehicleList()[0].testBoatSpecificMethod() AttributeError: *'Vehicle' object has no attribute 'testBoatSpecificMethod'* *'Vehicle' object has no attribute 'testBoatSpecificMethod'* Here I want Vehicle to be a Boat object. If there is not a build in or recommended/known Boost.Python means to handle this problem, I'm thinking of wrapping the list (Lots of accessors to be wrapped in my library.) with a get accessor returning a boost::python::list, storing the derived most types. Getting the derived most type possibly by calling overriden 'getAsDerivedClass' method. I would like to avoid this. I dislike having to add python usage specific methods to the library, for our design and vision values / reasons. Kind Regards, Christoff

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BGL - maximum_adjacency_search - assignedVertices
by Adam Celick 14 Oct '14

14 Oct '14

I was looking at the implementation of maximum_adjacency_search algorithm and got confused by the assignedVertices local variable. It is defined as a set of vertex descriptors and is being iterated over inside the main loop (lines 168-184) but it is never inserted into. So the for loop will always skip. It looks to me as if that part of the code can be eliminated. Am I missing something? Thanks, Adam

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Generating kuratowski subgraph with external edge index map
by Amir Hassan 13 Oct '14

13 Oct '14

Hi! I have a graph which i test for planarity and in case the test fails i want to generate the kuratowski subgraph. I have code that used to compile with boost graph 1.36 but doesn't with 1.56. I guess the problem has to do with the type of the edge index map. you can find code and error messages here: http://stackoverflow.com/questions/26346343/c-boost-graph-generating-kurato… Help is greatly appreciated! greets, amir

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[interprocess 1.42] Copy multiple variables into shared memory
by Michael Behnke 13 Oct '14

13 Oct '14

Hello, I'm trying to write multiple variables one by one into a mapped_region, but somehow I fail. Here is the Code I worked on so far: boost::interprocess::shared_memory_object shm_obj(boost::interprocess::open_or_create, "Test", boost::interprocess::read_write); shm_obj.truncate(1000); boost::interprocess::mapped_region region(shm_obj, boost::interprocess::read_write, 0, 0); uint32_t size = 33; uint32_t type = 666; std::string data("I'm a Test!"); uint32_t* start_ptr_int = &(static_cast<uint32_t*> (region.get_address())[0]); std::memcpy(start_ptr_int, &size, sizeof (uint32_t)); start_ptr_int = &(static_cast<uint32_t*> (region.get_address())[4]); std::memcpy(start_ptr_int, &type, sizeof (uint32_t)); char* start_ptr_char = &(static_cast<char*> (region.get_address())[8]); std::memcpy(start_ptr_char, data.c_str(), data.length()); uint32_t sizeOfData; std::memcpy(&sizeOfData, &(static_cast<uint32_t*> (region.get_address())[0]), sizeof (uint32_t)); uint32_t typeOfData; std::memcpy(&typeOfData, &(static_cast<uint32_t*> (region.get_address())[4]), 4); char* revData = new char[sizeOfData]; std::memcpy(revData, &(static_cast<char*> (region.get_address())[sizeof (uint32_t) * 2]), sizeOfData); First I write an uint32_t into the region at index 0. Afterwards, I'm writing another uint32_t at position 4 (assuming the first uint32_t took the bytes 0 - 3). Last I write a string into the region, at index 8. Reading the first uint32_t again from shared memory works fine, as does reading the string (the last variable). But if I try to read the second variable (uint32_t) the data is not what I expected. I know that the problem is memcpy, somehow my syntax does not work. Unfortunately I could not find a matching example, cause mostly memset is used to explain the functionality of boost::mapped_region. I have to write lots of data into shared memory (structured like size1|type1|data1|...|sizeN|typeN|dataN) but still can't figure out how to do this the right way. Any suggestions are greatly appreciated. Kind regards Michael Behnke -- Bachelorand ________________________________________________________ ADITION technologies AG Schwarzwaldstraße 78b 79117 Freiburg http://www.adition.com T +49 / (0)761 / 88147 - 30 F +49 / (0)761 / 88147 - 77 SUPPORT +49 / (0)1805 - ADITION (Festnetzpreis 14 ct/min; Mobilfunkpreise maximal 42 ct/min) Eingetragen beim Amtsgericht Düsseldorf unter HRB 54076 Vorstände: Andreas Kleiser, Jörg Klekamp, Marcus Schlüter Aufsichtsratsvorsitzender: Joachim Schneidmadl UStIDNr.: DE 218 858 434

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Boost Locale – accessing ICU functions directly
by Caroline Beltran 10 Oct '14

10 Oct '14

I recently began using Boost Locale traversing and boundary analysis of Unicode strings. I’ve used some of the features available for case conversion, i.e.: to_upper(), which appears to wrap ICU’s toUpper() function. I didn’t find Boost Locale wrappers for other ICU functions such as u_isalpha() or u_isalnum(). How can I these ICU functions? Thank you!

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Are shared memory files distributable?
by Rajalakshmi Iyer 10 Oct '14

10 Oct '14

Hello, Is it possible to create a shared memory file using Boost Interprocess (with STL containers) and distribute it to several machines for reading and modifying independently? Thanks Raj -- @BlisMedia <http://twitter.com/BlisMedia> www.blismedia.com <http://blismedia.com> This email and any attachments to it may be confidential and are intended solely for the use of the individual to whom it is addressed. Any views or opinions expressed are solely those of the author and do not necessarily represent those of BlisMedia Ltd, a company registered in England and Wales with registered number 06455773. Its registered office is 3rd Floor, 101 New Cavendish St, London, W1W 6XH, United Kingdom. If you are not the intended recipient of this email, you must neither take any action based upon its contents, nor copy or show it to anyone. Please contact the sender if you believe you have received this email in error.

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[make_shared] How to use boost::make_shared with more than 9 arguments
by dariomt＠gmail.com 10 Oct '14

10 Oct '14

I could patch my local copy with several more overloads (I need up to 12 parameters) but, is there a better way? I cannot change the constructor of the class to group parameters (as recommended in StackOverflow). Of course this is for C++03 Regards

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Re: [Boost-users] Flyweight: wrapping shared_ptr
by Joaquin M Lopez Munoz 10 Oct '14

10 Oct '14

> De: Boost-users [mailto:boost-users-bounces@lists.boost.org] > En nombre de Akim Demaille > Enviado el: martes, 07 de octubre de 2014 18:27 > Para: Boost Users List > Asunto: Re: [Boost-users] Flyweight: wrapping shared_ptr > > Le 7 oct. 2014 à 18:18, Joaquín Mª López Muñoz <joaquin(a)tid.es> a écrit : > > > An alternative would be to use some sort of cloning smart pointer to > > spare the reference count, but it's not clear to me this would be > > faster than > > shared_ptr: > > > > * element exists: shared_ptr creation is slower than clone_ptr > > creation > > * element does not exist: shared_ptr creation and copy is probably > > faster than clone_ptr creation and cloning. > > Yes, indeed. A slightly smarter approach involves a cloning class that accepts a const Base& and does only clone on copy, thus avoiding dynamic memory allocation when the element already exists. This can be nicely wrapped up as follows: template<typename Base> class poly_holder { public: poly_holder(const Base& x):p(&x),dlt(false){} poly_holder(const poly_holder& x):p(x.p->clone()),dlt(true){} poly_holder& operator=(const poly_holder& x) { Base* q=x.p->clone(); if(dlt)delete p; p=q; dlt=true; return *this; } ~poly_holder(){if(dlt)delete p;} operator const Base&()const {return *p;} private: const Base* p; bool dlt; }; template<typename Base> class poly_flyweight:public boost::flyweight<poly_holder<Base>> { public: using super=boost::flyweight<poly_holder<Base>>; using super::super; const Base& operator*() const{return base();} const Base* operator->()const{return &base();} private: const Base& base()const{return this->get();} }; template<typename Base> std::size_t hash_value(const poly_flyweight<Base>& x) { return boost::hash<const Base*>()(&*x); } template<typename Base> bool operator==( const poly_flyweight<Base>& l,const poly_flyweight<Base>& r) { return static_cast<boost::flyweight<poly_holder<Base>>>(l)== static_cast<boost::flyweight<poly_holder<Base>>>(r); } template<typename Base> bool operator!=( const poly_flyweight<Base>& l,const poly_flyweight<Base>& r) { return !(l==r); } I've rewritten your test case to take advantage of this poly_flyweight thing, cleaning up some unnecessary hash and operator== overloads along the way and without resorting to the intermediate Exp_ type; see: http://coliru.stacked-crooked.com/a/76e87531b65d44f9 > Is there anyway Flyweight could have supported the operator-> natively? > It seems that with some SFINAE under the hood, it would work, don't you think? Yep, that would be possible, the only reason I didn't do it is to not clutter the interface. Also, some std classes such as (C++17) std::optional implement operator* differently, without the extra dereference required by smart pointer semantics. Joaquín M López Muñoz Telefónica

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Boost.Geometry, probable bug in point_on_surface
by Petr Doubrava 10 Oct '14

10 Oct '14

#include <boost/geometry.hpp> #include <boost/geometry/geometries/point_xy.hpp> #include <boost/geometry/geometries/polygon.hpp> void test_point_on_surface() { typedef boost::geometry::model::point<double, 2, boost::geometry::cs::cartesian> Point; boost::geometry::model::polygon<Point> poly; boost::geometry::read_wkt("POLYGON((1074699.93 703064.65, 1074702.10 703054.62, 1074704.53 703061.40, 1074703.90 703064.58, 1074699.93 703064.65))",poly); boost::geometry::correct(poly); Point point; boost::geometry::point_on_surface(poly,point); //computed point isn't on the surface of polygon //[0] 1074839.1013086310 double //[1] 703154.77900308778 double bool res = boost::geometry::within(point,poly); // res is false }

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[property_tree] Failure with Boost 1.56
by beet 10 Oct '14

10 Oct '14

Dear all, with the release of Boost 1.56, on Ubuntu 14.04 (g++ 4.8.2, 64 bit), code like the following suddenly fails to compile: pt::xml_writer_settings<char> settings('\t', 1); pt::write_xml(someFileName, ptr_out, std::locale(), settings); "pt" is obviously an alias for boost::property_tree. The error message I'm getting is /opt/boost156/include/boost/property_tree/detail/xml_parser_writer_settings.hpp:38:35: error: 'char' is not a class, struct, or union type typedef typename Str::value_type Ch; I can see the following possibly relevant change in property_tree: In Boost 1.55, from xml_parser.hpp: ----------------------------------- template<typename Ptree> void write_xml( const std::string & , const Ptree & , const std::locale & = std::locale() , const xml_writer_settings<typename Ptree::key_type::value_type >& = xml_writer_settings<typename Ptree::key_type::value_type >() ); In Boost 1.56, same header: --------------------------- template<typename Ptree> void write_xml( const std::string & , const Ptree & , const std::locale & = std::locale() , const xml_writer_settings<typename Ptree::key_type > & = xml_writer_settings<typename Ptree::key_type >() ); So xml_writer_settings is now given a Ptree::key_type instead of a Ptree::key_type::value_type which I assume is the reason for the above error. Is there a portable way to specify the type of indention character in write_xml ? Best Regards, Beet

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[Boost.Polygon] Bug in polygon_set_data, or are my expectations wrong?
by Patrick J. LoPresti 09 Oct '14

09 Oct '14

I have just submitted a bug report: https://svn.boost.org/trac/boost/ticket/10642 ...but I am wondering if the bug is in my understanding rather than in Boost.Polygon. The test case is very simple, so I am appending it to this message. My question is, should I expect polygon_set_data<int> to scramble such a simple figure? It almost looks like some (but not all) of the coordinates are being snapped to multiples of 2. Or something. Note that doubling all of the coordinates avoids the bug. Assuming it is a bug (?) Thanks! - Pat #include <boost/polygon/polygon.hpp> #include <iostream> #include <cstdlib> namespace bp = boost::polygon; using namespace bp::operators; typedef bp::polygon_set_data<int> PolygonSet; typedef bp::polygon_data<PolygonSet::coordinate_type> Polygon; typedef bp::polygon_traits<Polygon>::point_type Point; int main(int argc, char *argv[]) { // Small figure with a little hole. Area should be 32. const Point points[] = { Point(0,0), Point(6,0), Point(6,4), Point(4,6), Point(0,6), Point(0,0), Point(4,4), Point(5,4) }; Polygon poly1(&points[0], &points[sizeof(points)/sizeof(points[0])]); PolygonSet ps1; ps1 += poly1; std::cout << "poly1 area == " << area(poly1) << "\n"; // Boost.Polygon says the area of ps1 is 30. That is because its internal // representation is wrong, as you can confirm by manually // examining the result of ps1.get() or ps1.get_trapezoids(). std::cout << "ps1 area == " << area(ps1) << "\n"; // Doubling the coordinates avoids the bug. Polygon poly2(poly1); scale_up(poly2, 2); PolygonSet ps2; ps2 += poly2; std::cout << "poly2 area == " << area(poly2) << "\n"; std::cout << "ps2 area == " << area(ps2) << "\n"; assert(area(poly2) == area(ps2)); assert(area(poly1) == area(ps1)); }

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[polygon] Incorrect output from get_trapezoids(..., HORIZONTAL)
by Patrick J. LoPresti 08 Oct '14

08 Oct '14

I apologize for sending this to the mailing list, but when I tried to file a bug report via Trac, it said "Trac thinks your submission might be Spam. To prove otherwise please provide a response to the following"... And then there was no "following". Please let me know if there is a better forum to report this sort of issue. I am using Boost 1.56. The following program uses boost::polygon to slice up a figure (with a "hole" cut out of it) into horizontal trapezoids. The output I get is: Output: polygon (4 3) (4 0) (0 0) (0 3) (4 3) ...which is clearly wrong. I am pretty sure my code is correct, because if I replace bg::HORIZONTAL with bg::VERTICAL, I get the correct output of a bunch of vertical trapezoids. For my application, I really want horizontal traps. I suppose I can just swap x and y on input and output... But this seemed worth reporting. Thanks. - Pat #include <boost/polygon/polygon.hpp> #include <iostream> namespace bp = boost::polygon; typedef bp::polygon_set_data<int> PolygonSet; typedef bp::polygon_data<PolygonSet::coordinate_type> Polygon; typedef bp::polygon_traits<Polygon>::point_type Point; std::ostream & operator<<(std::ostream &os, const Point &pt) { return os << "(" << bp::x(pt) << " " << bp::y(pt) << ")"; } std::ostream & operator<<(std::ostream &os, const Polygon &poly) { os << "polygon "; for (Polygon::iterator_type p = poly.begin() ; p != poly.end() ; ++p) os << " " << *p; return os; } std::ostream & operator<<(std::ostream &os, const PolygonSet &ps) { std::vector<Polygon> temp; ps.get(temp); os << "polygonset "; for (std::vector<Polygon>::const_iterator p = temp.begin() ; p != temp.end() ; ++p) os << " " << *p; return os; } int main(int argc, char *argv[]) { const Point points[] = { Point(2,0), Point(4,0), Point(4,3), Point(0,3), Point(0,0), Point(2,0), Point(2,1), Point(1,1), Point(1,2), Point(3,2), Point(3,1), Point(2,1) }; Polygon poly; bp::set_points(poly, &points[0], &points[sizeof(points)/sizeof(points[0])]); std::cout << "Input: " << poly << "\n"; PolygonSet ps; ps.insert(poly); std::cout << "ps = " << ps << "\n"; std::vector<Polygon> traps; // Note: bp::VERTICAL works fine bp::get_trapezoids(traps, ps, bp::HORIZONTAL); std::cout << "Output:\n"; for (std::vector<Polygon>::const_iterator p = traps.begin() ; p != traps.end() ; ++p) std::cout << *p << "\n"; }

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program_options: Make PO not eat argc
by Florian Lindner 08 Oct '14

08 Oct '14

Hello, I have a couple of libraries (MPI, petsc) that also consume my applications argc and argv, which is parsed with boost::program_options before. po seems to eat up argv, i.e. removes all items that it handles. Can I disable that behavior somehow so that po does not touch argc/argv. Or do I need to recreate it, e.g. using collect_unrecognized? Thanks, Florian

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program_options: How to best model two/three pos args
by Florian Lindner 08 Oct '14

08 Oct '14

Hello, my application has positional arguments like that: Run tests : ./app test ConfigurationName PathToSrc Run server : ./app server ParticipantName ConfigurationName Print XML reference: ./app xml Linewidth It has three (if first in [test, server]) or two (if first in [xml]) positional arguments. How to model and test this best using boost? I could add three options and declare them as positional arguments, named like "first", "second", "third". I could also use just one positional argument like: po::positional_options_description pos_dec; pos_dec.add("positionals", 3); and test the resulting vector. What do you think? Thanks, Florian

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MSM to diagram
by Robert Bielik 08 Oct '14

08 Oct '14

Hi all, I want to use MSM in an application, however, for design documentation purposes I'd like to be able to express the state machine in a diagram. And preferably going the route from C++ code -> graphical diagram (i.e. not from UML -> C++ code). Has anyone looked at that, or know of resources on how to accomplish this ? TIA /Robert

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[general] Advice from Bjarne Stroustrup
by legalize+jeeves＠mail.xmission.com 06 Oct '14

06 Oct '14

[Please do not mail me a copy of your followup] At the end of each chapter in "The C++ Programming Language", 4th edition, Bjarne Stroustrup has a list of advice. I found the advice very helpful and decided that the advice should be online somewhere. Initially I put this together as a PPT presentation, but oh my lord, it was too long. Instead, I made a page in my user space on the cppreference.com wiki: <http://en.cppreference.com/w/User:Legalize/Advice_from_Bjarne_Stroustrup> This let me link to other pages on the wiki describing specific language features where possible. Hopefully you will find it useful. -- "The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> The Computer Graphics Museum <http://computergraphicsmuseum.org> The Terminals Wiki <http://terminals.classiccmp.org> Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com>

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NT² eand Boost.SIMD release 3.1
by Joel FALCOU 06 Oct '14

06 Oct '14

NT2 is a Matlab inspired, high-level API for scientific computation in C++. Boost.SIMD is a candidate library for inclusion in Boost dealing with the portable encpsulation of SIMD instructions sets. This following releases updates NT2 and Boost.SIMD libraries to version 3.1 This new release of NT2 and Boost.SIMD focused on fixing performance issues and add some new support for architecture and parallel algorithms. The main new features include: - Linear Algebra functions can now use GPGPU through the MAGMA library whenever possible. - Reduction and Scan operations now works with more shared memory back-end - Altivec support is now complete for the VMX ISA We wish to thanks Ian Masliah for his work on MAGMA, Antoine Tran Tan for the shared memory support and Pierre Esterie participation to the Altivec ISA completion. Special thanks to Tim Blenchmann and khegeman for their help and patch submisisons throughout this development. The release Changelog is here : https://github.com/MetaScale/nt2/releases/tag/3.1.0 The files can be download from : http://nt2.metascale.org/downloads/ The Documentation (in progress) is here : http://nt2.metascale.org/doc/html/index.html **Next release announcment** This release is the last C++03 compliant version of both NT2 and Boost.SIMD. The next release - 4.0 - will be C++11 only. The new minimal version of supported compilers will be : - g++ 4.6 - Microsoft Visual Studio 12 (2013) - clang 3.4 - icc 12.1 The main reason for this change is to be able to properly fix the compile-time issue that one may experience. It'll also allow us to use some C++11 feature to simplify or streamline some of the user interface. * The NT2 Team

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[bimap] Look ups on the vector_of collection type
by Arindam Mukherjee 05 Oct '14

05 Oct '14

Would it make sense to define a bimap like this: boost::bimap< boost::bimaps::set_of<std::string>, boost::bimaps::vector_of<std::string>> mymap; And then make the right view (vector_of) more amenable to lookups by performing a sort followed by a binary search on it? Thanks.

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Flat multi set operation costs
by Paolo Bolzoni 03 Oct '14

03 Oct '14

Dear list, In a project of mine I am using a sorted vector as a multimap. The point was that insert, delete and retrieval operations arrived in batches (lots of inserts, lots of retrieval, lots of deletes...) so I essentially saved time sorting the vector when a new kind of operation arrived. I recently noticed boost has the flat multiset implementation, so I was wondering do it follows the same idea? If it does I would be nice to kick-out some code and use the library for ease of maintenance. Your faithfully, Paolo

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boost python wrapping class with getter/setter with const string& arg and return type
by MM 03 Oct '14

03 Oct '14

Hi class C { public: const std::string& get_name() const; void set_name(const std::string&); private: std::string name_; }; given this class C, how would I expose it to python with the class property name? class_<C>("C"). .add_property("name", &C::get_name, &C::set_name); with the proper includes as in the tutorial, it fails to compile. MM

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[Test] Global Fixtures
by Mauricio Carneiro 03 Oct '14

03 Oct '14

I am trying to use global fixtures in my tests but I may be misinterpreting the documentations. The following toy example doesn't work : #include <boost/test/unit_test.hpp> struct TruthFixture { int x = 3; int f (int a) { return a + 3; } }; BOOST_GLOBAL_FIXTURE( TruthFixture ) BOOST_AUTO_TEST_CASE(test_variable) { printf("x = %d\n", x); } BOOST_AUTO_TEST_CASE(test_function) { printf("f(2) = %d\n", f(2)); } the error message I get is the following: test/test.cpp:14:22: error: use of undeclared identifier 'x'; did you mean 'TruthFixture::x'? printf("x = %d\n", x); ^ TruthFixture::x test/test.cpp:4:7: note: 'TruthFixture::x' declared here int x = 3; ^ test/test.cpp:14:22: error: invalid use of non-static data member 'x' printf("x = %d\n", x); ^ test/test.cpp:18:25: error: use of undeclared identifier 'f'; did you mean 'TruthFixture::f'? printf("f(2) = %d\n", f(2)); ^ TruthFixture::f test/test.cpp:6:7: note: 'TruthFixture::f' declared here int f (int a) { ^ test/test.cpp:18:25: error: call to non-static member function without an object argument printf("f(2) = %d\n", f(2)); ^ 4 errors generated. clearly the BOOST_GLOBAL_FIXTURE declaration is not doing anything. But if I drop the global fixture declaration and revert to the per function declaration, it works: #include <boost/test/unit_test.hpp> struct TruthFixture { int x = 3; int f (int a) { return a + 3; } }; BOOST_FIXTURE_TEST_CASE(test_variable, TruthFixture) { printf("x = %d\n", x); } BOOST_FIXTURE_TEST_CASE(test_function, TruthFixture) { printf("f(2) = %d\n", f(2)); } then everything works perfectly as intended. Any input on what I am doing wrong with the *global* fixture declaration? Thank you! Mauricio Carneiro, Ph.D. http://www.broadinstitute.org/~carneiro/

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[Boost] [DateTime] dividing a time_period in N time_periods
by Pablo Madoery 02 Oct '14

02 Oct '14

Hi, I want to make a method which divides a time_period in N time periods, something like this: list<time_period> splitTimePeriod(time_period timePeriod, int n); I actually have made it and although it seems to work it results very inefficient regarding the time it took to divide a large time_period. The method I did is this: list<time_period> splitTimePeriod(time_period timePeriod, int n) { double secsTime = dateTime::diffSeconds(timePeriod.end(), timePeriod.begin()); // tiempo en segundos de cada período de tiempo double ti = secsTime / n; list<time_period> timePeriods; // tiempo de comienzo del primer período de tiempo ptime tpBegin = timePeriod.begin(); // tiempo de fin del último período de tiempo ptime tpLastEnd = timePeriod.end(); for (int i = 0; i < n; i++) { int tUnits = ti * time_duration::ticks_per_second(); // tiempo de comienzo del siguiente período de tiempo ptime tpNextBegin = dateTime::increment(tpBegin, tUnits); // tiempo de fin del período de tiempo ptime tpEnd; if (i == n - 1) { tpEnd = tpLastEnd; } else { tpEnd = dateTime::decrement(tpNextBegin, 1); // guarda para evitar que por cuestiones // de redondeo, el tiempo final de un período // sea mayor que el pasado inicialmente // como argumento de entrada if (tpEnd > tpLastEnd) { tpEnd = tpLastEnd; } } time_period p(tpBegin, tpEnd); // se inserta período de tiempo en la lista timePeriods.push_back(p); // se actualiza el comienzo del siguiente período de tiempo tpBegin = tpNextBegin; } return timePeriods; } Other methods I use are these: double diffSeconds(const ptime &dateA, const ptime &dateB) { time_duration diff = dateA - dateB; return diff.total_seconds(); } ptime increment(const ptime &date, int n) { time_iterator it(date, dateTime::unit); for (int i = 0; i < n; i++) { ++it; } return *it; } ptime decrement(const ptime &date, int n) { time_iterator it(date, dateTime::unit); for (int i = 0; i < n; i++) { --it; } return *it; } const time_duration unit = microseconds(1); ################################################# The question is: is there a better way to accomplish this?

3 6

[mpl] struct definition and mpl sequence in one shot?
by Adam Romanek 01 Oct '14

01 Oct '14

Hi! I have a problem and I'm not sure how to approach it. Currently my code looks like this: struct Definition { typedef boost::mpl::int_<5> A; typedef boost::mpl::int_<3> B; typedef boost::mpl::int_<6> C; typedef boost::mpl::int_<1> D; typedef boost::mpl::vector<A, B, C, D> Seq; }; Here, the number N in mpl::int_< N > denotes some arbitrary decimal number. Then some other code calculates the sum of these numbers up to the type defined by "key", e.g. for Definition::D, the sum is 5 + 3 + 6 (A + B + C). This needs to be done at compile-time. That's why I use mpl::vector and some appropriate meta-programming. I'm wondering whether it would be possible to provide such struct definition without the need to repeat type names in the mpl::vector for Seq type. In other words, I'd probably need a bunch of macros which would allow me to write code like this: struct Definition { FIELD(A, 5); FIELD(B, 3); FIELD(C, 6); FIELD(D, 1); GEN_SEQ() // if needed }; And then Definition::A would still refer to boost::mpl::int_<5>, or would at least allow me to access the boost::mpl::int_<5> somehow, and Definition::Seq would give me the appropriate MPL sequence. Of couse this is just my imagination. The code might look different, I'm just looking for options. Thanks in advance. Adam Romanek

1 0

[Build] -finline-functions no longer supported in clang 3.5
by Mauricio Carneiro 01 Oct '14

01 Oct '14

Hi all, turns out clang 3.5 is no longer supporting <http://llvm.org/klaus/clang/commit/6590426aeb5275ec33dac2877f9349bbbb2d4b2e…> -finline- <http://llvm.org/klaus/clang/commit/6590426aeb5275ec33dac2877f9349bbbb2d4b2e…> functions <http://llvm.org/klaus/clang/commit/6590426aeb5275ec33dac2877f9349bbbb2d4b2e…>, which it claims never did anything anyway, so this is their way to take it out of usage. My release builds (which are done solely through boost build) automatically add this parameter to the compilation command line, and thus is now failing (since I use -Werror). Is there a way to modify the "release" variant not to use that line anymore? Also, is there a way to extend the command line parameters that the release variant will use? Thank you, Mauricio Carneiro, Ph.D. http://www.broadinstitute.org/~carneiro/

1 0

boost::log native syslog sink.
by svante karlsson 01 Oct '14

01 Oct '14

I'm using ubuntu 14.04 with the included boost 1.54 and I'm trying to set up a syslog sink. I've cut this from the samples and added "ident". void init_syslog() { boost::shared_ptr< boost::log::core > core = boost::log::core::get(); // Create a backend boost::shared_ptr< sinks::syslog_backend > backend(new sinks::syslog_backend( keywords::facility = sinks::syslog::local0, keywords::use_impl = sinks::syslog::native, keywords::ident = "mqtt-proxy" )); // Set the straightforward level translator for the "Severity" attribute of type int backend->set_severity_mapper(sinks::syslog::direct_severity_mapping< int >("Severity")); // Wrap it into the frontend and register in the core. // The backend requires synchronization in the frontend. core->add_sink(boost::make_shared< sink_t >(backend)); } The logs end up in syslog but I cant prefix those by program name (and processnumber ) - I've expected the logs to be marked as 'mqtt-proxy' I get logs like Sep 29 03:47:40 ubuntu : ad569c57-780a-431b-bde3-7ede49e7c77f, bridge create but what I would like is similar to Sep 29 03:47:40 ubuntu mqtt-proxy: ad569c57-780a-431b-bde3-7ede49e7c77f, bridge create Am I missing something or is ident not supported? /svante

1 0

[Threads] and OpenMP
by Stephan Menzel 01 Oct '14

01 Oct '14

Hi all, I would like to ask around about a strategy on how to tacke the following threading problem: I am maintaining a boost intensive portable C++ client-server application and recently have included a highly complex 3rd party algorithm into my application that does CPU intense stuff. Long running stuff. Often in the range of days. While at the same time being heavy in OpenMP usage. Now of course requirements are that the user has to be able to cancel this. The algorithm runs in a boost threads controlled background thread. Now I began to place interruption points throughout the 3rd party code but soon had to realize that a lot of CPU time is being handled in OpenMP threaded code regions. So the question is: How can I more or less gracefully shut this down? How do interruption points work in an omp parallel for loop? Do I have a chance at all? My constraints here are a bit forgiving. Given the complexity of the 3rd party code I have already accepted the notion that this is gonna be a memleak monster. Luckily, there's no disk or other hardware access so I'm ready to live with a certain amount of mem not being cleaned up. Yet the backend thread communicates with the spawning class by calling a mutexed callback when it's ready so the user knows it's cancelled. This is protected by a boost mutex as well. And juding from the horrible threading "clogs" that I observed in my first trials I suppose this is gonna be a problem as well. And input is appreciated. And yes, I am aware that this is gonna be an ugly mess. Cheers, Stephan

3 3

Re: [Boost-users] choosing source ip on multihomed computer (Bjorn Reese)
by David Frank 01 Oct '14

01 Oct '14

I did, here is my relevant code segment, but the destination still shows that I sent from another ip than what I set here: tcp::resolver resolver(fIo_service); tcp::resolver::query query(tcp::v4(), host, port); tcp::resolver::iterator iterator = resolver.resolve(query); fpSocket = new tcp::socket(fIo_service); if (fpSocket == nullptr) return ; fpSocket->open(boost::asio::ip::tcp::v4()); fpSocket->bind(boost::asio::ip::tcp::endpoint(boost::asio::ip::address::from_string("<ip>"), 0)); boost::system::error_code errcode; boost::asio::connect(*fpSocket, iterator, errcode); On Tuesday, September 30, 2014 12:00 PM, "boost-users-request(a)lists.boost.org" <boost-users-request(a)lists.boost.org> wrote: Send Boost-users mailing list submissions to boost-users(a)lists.boost.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.boost.org/mailman/listinfo.cgi/boost-users or, via email, send a message with subject or body 'help' to boost-users-request(a)lists.boost.org You can reach the person managing the list at boost-users-owner(a)lists.boost.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Boost-users digest..." Today's Topics: 1. Re: choosing source ip on multihomed computer (Bjorn Reese) 2. Re: [Threads] and OpenMP (Bjorn Reese) ---------------------------------------------------------------------- Message: 1 Date: Tue, 30 Sep 2014 15:58:37 +0200 From: Bjorn Reese <breese(a)mail1.stofanet.dk> To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] choosing source ip on multihomed computer Message-ID: <542AB70D.6060807(a)mail1.stofanet.dk> Content-Type: text/plain; charset=windows-1252; format=flowed On 09/30/2014 03:04 PM, David Frank wrote: > I'm wondering how to make boost::asio::connect(<socket>, ...) > connect from the source interface/ip address I choose on a multihomed > computer. Call bind() before connect(). ------------------------------ Message: 2 Date: Tue, 30 Sep 2014 15:59:43 +0200 From: Bjorn Reese <breese(a)mail1.stofanet.dk> To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] [Threads] and OpenMP Message-ID: <542AB74F.4010303(a)mail1.stofanet.dk> Content-Type: text/plain; charset=windows-1252; format=flowed On 09/30/2014 11:24 AM, Stephan Menzel wrote: > So the question is: How can I more or less gracefully shut this down? > How do interruption points work in an omp parallel for loop? Do I have a > chance at all? One approach is to execute the tasks in a separate process. The process can easily be killed, and it takes care of the memory leaks. ------------------------------ Subject: Digest Footer _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users ------------------------------ End of Boost-users Digest, Vol 3932, Issue 2 ********************************************

1 0

[bimap] Mapping a set into itself
by Arindam Mukherjee 30 Sep '14

30 Sep '14

Is there a way to represent a mapping from a set to itself using boost::bimap? Regards, Arindam

1 0

choosing source ip on multihomed computer
by David Frank 30 Sep '14

30 Sep '14

Hi, I'm wondering how to make boost::asio::connect(<socket>, ...) connect from the source interface/ip address I choose on a multihomed computer. Thanks, Dave

2 1

[serialization] serialize type-erasure
by oswin krause 30 Sep '14

30 Sep '14

Hi list, i am currently trying to serialize a type-erasure, but i am not sure how this should be done exactly. Before boost 1.56 we used the polymorphic archives and a base class to implement serialization, but since they are broken in 1.56 and a few users are nagging me (plus i can't compile the library myself any more after a mandatory upgrade...), i have to get it right. my setup looks like this class ErasureBase{ .... }; template<class T> class Erasure{ public: Erasure (T& foo):m_foo(foo){} template<class Archive> void serialize(Archive & ar, const unsigned int){ ar & m_foo; } private: T& m_foo; }; class MyClass{ public: template<class T> MyClass(T& foo):m_wrapper(new Erasure<T>(foo)){} template<class Archive> void serialize(Archive & ar, const unsigned int){ ar & *m_wrapper; } private: boost::scoped_ptr<ErasureBase> m_wrapper; }; in the usage of MyClass i assume that serialisation/deserialisation is only to be called on constructed objects of type MyClass, therefore i do not need capabilities to deserialize from pointers. The question is: how do I tell the archive which Erasure<T> exist? The solutions in the tutorial pages only look at the cases where Erasure<T> is serialized directly or where it is known which classes are to be serialized (and i don't assume my users to know which Erasure<T> are instantiated...). If there exists a solution for this: is the solution also stable wrt the order of registration of classes? Best, Oswin The ques

1 1

[multi_index] Couple of questions on multi-index containers
by Aaron Levy 29 Sep '14

29 Sep '14

If I erase elements in a multi_index_container, how are iterators invalidated? 1. For other than random_access index, only iterators to the deleted element? 2. For random_access index, potentially any iterator? What are the data structures used internally for this container and its indexes. -- Aaron Levy aaron.levy(a)yandex.com

4 5

[msm] & typeerasure / any
by Raj Sambasivan 28 Sep '14

28 Sep '14

HI Boost-users/christophe, I'm trying to make use of type erasure for fsm based on suggestion from an earlier mail thread http://boost.2283326.n4.nabble.com/msm-access-to-root-fsm-td4649632.html but hitting compilation errors. Can you pls help? while the any works as expected for push back e.g for vector (bottom of email) it doesnt work for MSM.. *Doesn't Work for MSM:* BOOST_TYPE_ERASURE_MEMBER((has_process_event), process_event, 1) typedef any<has_process_event<HandledEnum(Event1 const &)>, _self&> any_fsm; struct AnyFSM { AnyFSM(any_fsm afsm_) : _afsm(afsm_) {} void process(Event1& e) { _afsm.process_event(e); } any_fsm _afsm; }; TestFSM test; test.start(); AnyFSM(test); test.process(Event1()); *error:* *test.cpp:47:43: **error: **'Event1' does not refer to a value* typedef any<has_process_event<HandledEnum(Event1 const &)>, _self&> any_fsm; *Works for vector:* BOOST_TYPE_ERASURE_MEMBER((has_push_back), push_back, 1) typedef any<has_push_back<void(int)>, _self&> any_container; void append_many(any_container container) { for(int i = 0; i < 10; ++i) container.push_back(i); } struct AnyContainer { AnyContainer(any_container cont_) : _cont(cont_) {} void append() {append_many(_cont); } any_container _cont; }; AnyContainer m(v); m.append(); for(auto i : v) { std::cout << i << std::endl; } Thanks -Raj

1 1

[Log] [ASIO with ssl] windows service crash on windows server 2008
by Pritesh Acharya 27 Sep '14

27 Sep '14

Details: OS: Windows Server 2008 SP2 Boost 1.56.0 (shared library) OpenSSL: Win32OpenSSL-1_0_1i I have a windows service application written in C++. As a minimal test case, I have created a small demo code to show the problem. The service just log some information to a file and does nothing. The same code has no problem in my Development machine(windows7) and window Server 2003. Also on Windows Server 2008, when the service is run as LocalSystem privilege, it crashes, but when run as Administrator it works. Additionally, when I remove the asio ssl header from the code, it works. or when I remove the log header, it works. The problem seems to be related to when ASIO ssl and LOG are used together. Below I've included 1. Code 2. User Mode Crash dump 3. Call Stack obtained from running Crash Dump *1. Code:* *#include <boost/log/trivial.hpp>* *#include <boost/log/sources/severity_logger.hpp>* *#include <boost/asio/ssl.hpp>* *#include <windows.h>* *#include <stdio.h>* *#define SLEEP_TIME 5000* *#define LOGFILE "C:\\AASSLInstaller_D_56\\memstatus.txt"* *SERVICE_STATUS ServiceStatus; * *SERVICE_STATUS_HANDLE hStatus; * *void ServiceMain(int argc, char** argv); * *void ControlHandler(DWORD request); * *int InitService();* *int WriteToLog(char* str)* *{* * FILE* log;* * log = fopen(LOGFILE, "a+");* * if (log == NULL)* * return -1;* * fprintf(log, "%s\n", str);* * fclose(log);* * return 0;* *}* *//void ThreadFunction()* *//{* *// WriteToLog("at ThreadFunction");* *// //std::cout << "hello World " << std::endl;* *// //getchar();* *//}* *int main() * *{ * * using namespace boost::log::trivial; //for logging* * boost::log::sources::severity_logger_mt< boost::log::trivial::severity_level > lg;* * //WriteToLog("at main");* * //return 1;* * SERVICE_TABLE_ENTRY ServiceTable[2];* * ServiceTable[0].lpServiceName = "MemoryStatus";* * ServiceTable[0].lpServiceProc = (LPSERVICE_MAIN_FUNCTION)ServiceMain;* * ServiceTable[1].lpServiceName = NULL;* * ServiceTable[1].lpServiceProc = NULL;* * // Start the control dispatcher thread for our service* * StartServiceCtrlDispatcher(ServiceTable); * * return 0;* *}* *void ServiceMain(int argc, char** argv) * *{ * * int error; * * ServiceStatus.dwServiceType = SERVICE_WIN32; * * ServiceStatus.dwCurrentState = SERVICE_START_PENDING; * * ServiceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;* * ServiceStatus.dwWin32ExitCode = 0; * * ServiceStatus.dwServiceSpecificExitCode = 0; * * ServiceStatus.dwCheckPoint = 0; * * ServiceStatus.dwWaitHint = 0; * * hStatus = RegisterServiceCtrlHandler(* * "MemoryStatus", * * (LPHANDLER_FUNCTION)ControlHandler); * * if (hStatus == (SERVICE_STATUS_HANDLE)0) * * { * * // Registering Control Handler failed* * return; * * } * * // Initialize Service * * //error = InitService(); * * error = 0;* * if (error) * * {* * // Initialization failed* * ServiceStatus.dwCurrentState = SERVICE_STOPPED; * * ServiceStatus.dwWin32ExitCode = -1; * * SetServiceStatus(hStatus, &ServiceStatus); * * return; * * } * * // We report the running status to SCM. * * ServiceStatus.dwCurrentState = SERVICE_RUNNING; * * SetServiceStatus (hStatus, &ServiceStatus);* * MEMORYSTATUS memory;* * // The worker loop of a service* * //boost::thread t(&ThreadFunction);* * while (ServiceStatus.dwCurrentState == SERVICE_RUNNING)* * {* * char buffer[16];* * GlobalMemoryStatus(&memory);* * sprintf(buffer, "%d", memory.dwAvailPhys);* * int result = WriteToLog(buffer);* * if (result)* * {* * ServiceStatus.dwCurrentState = SERVICE_STOPPED; * * ServiceStatus.dwWin32ExitCode = -1; * * SetServiceStatus(hStatus, &ServiceStatus);* * return;* * }* * Sleep(SLEEP_TIME);* * }* * return; * *}* *// Service initialization* *int InitService() * *{ * * int result;* * result = WriteToLog("Monitoring started.");* * return(result); * *} * *// Control handler function* *void ControlHandler(DWORD request) * *{ * * switch(request) * * { * * case SERVICE_CONTROL_STOP: * * WriteToLog("Monitoring stopped.");* * ServiceStatus.dwWin32ExitCode = 0; * * ServiceStatus.dwCurrentState = SERVICE_STOPPED; * * SetServiceStatus (hStatus, &ServiceStatus);* * return; * * case SERVICE_CONTROL_SHUTDOWN: * * WriteToLog("Monitoring stopped.");* * ServiceStatus.dwWin32ExitCode = 0; * * ServiceStatus.dwCurrentState = SERVICE_STOPPED; * * SetServiceStatus (hStatus, &ServiceStatus);* * return; * * default:* * break;* * } * * // Report current status* * SetServiceStatus (hStatus, &ServiceStatus);* * return; * *} * *2. Dump* *Dump Summary* *------------* *Dump File: with_ssl_56.exe.4208.dmp : C:\Dumps\with_ssl_56.exe.4208.dmp* *Last Write Time: 9/26/2014 11:59:38 AM* *Process Name: with_ssl_56.exe : C:\lpa_c\wix_for_service\build_win\src\with_ssl_56\Debug\with_ssl_56.exe* *Process Architecture: x86* *Exception Code: 0xC0000005* *Exception Information: The thread tried to read from or write to a virtual address for which it does not have the appropriate access.* *Heap Information: Not Present* *System Information* *------------------* *OS Version: 6.0.6002* *CLR Version(s): * *Modules* *-------* *Module Name Module Path Module Version* *----------- ----------- --------------* *with_ssl_56.exe C:\lpa_c\wix_for_service\build_win\src\with_ssl_56\Debug\with_ssl_56.exe 0.0.0.0* *ntdll.dll C:\Windows\System32\ntdll.dll 6.0.6002.18881* *kernel32.dll C:\Windows\System32\kernel32.dll 6.0.6002.19034* *advapi32.dll C:\Windows\System32\advapi32.dll 6.0.6002.18005* *rpcrt4.dll C:\Windows\System32\rpcrt4.dll 6.0.6002.18882* *boost_log-vc100-mt-gd-1_56.dll C:\boost_1_56_0_dyn\stage\lib\boost_log-vc100-mt-gd-1_56.dll 0.0.0.0* *boost_date_time-vc100-mt-gd-1_56.dll C:\boost_1_56_0_dyn\stage\lib\boost_date_time-vc100-mt-gd-1_56.dll 0.0.0.0* *MSVCP100D.dll C:\Windows\System32\MSVCP100D.dll 10.0.30319.1* *MSVCR100D.dll C:\Windows\System32\MSVCR100D.dll 10.0.30319.1* *boost_system-vc100-mt-gd-1_56.dll C:\boost_1_56_0_dyn\stage\lib\boost_system-vc100-mt-gd-1_56.dll 0.0.0.0* *boost_filesystem-vc100-mt-gd-1_56.dll C:\boost_1_56_0_dyn\stage\lib\boost_filesystem-vc100-mt-gd-1_56.dll 0.0.0.0* *boost_chrono-vc100-mt-gd-1_56.dll C:\boost_1_56_0_dyn\stage\lib\boost_chrono-vc100-mt-gd-1_56.dll 0.0.0.0* *boost_thread-vc100-mt-gd-1_56.dll C:\boost_1_56_0_dyn\stage\lib\boost_thread-vc100-mt-gd-1_56.dll 0.0.0.0* *psapi.dll C:\Windows\System32\psapi.dll 6.0.6000.16386* *ws2_32.dll C:\Windows\System32\ws2_32.dll 6.0.6001.18000* *msvcrt.dll C:\Windows\System32\msvcrt.dll 7.0.6002.18551* *nsi.dll C:\Windows\System32\nsi.dll 6.0.6001.18000* *user32.dll C:\Windows\System32\user32.dll 6.0.6002.18005* *gdi32.dll C:\Windows\System32\gdi32.dll 6.0.6002.19171* *3. Call Stack* * 00000000() * * user32.dll!76659ce4() * * [Frames below may be incorrect and/or missing, no symbols loaded for user32.dll] * * advapi32.dll!77b84158() * * advapi32.dll!77b840f6() * * advapi32.dll!77b8430d() * * ws2_32.dll!7670ab6d() * * ws2_32.dll!7670aa95() * * ws2_32.dll!7670a3b2() * * ws2_32.dll!7670ae3f() * * ws2_32.dll!7670ad7a() * * ws2_32.dll!7670acc3() * * ws2_32.dll!7670ac2b() * * boost_log-vc100-mt-gd-1_56.dll!boost::asio::detail::winsock_init_base::startup(boost::asio::detail::winsock_init_base::data & d, unsigned char major, unsigned char minor) Line 39 + 0x2d bytes C++* * boost_log-vc100-mt-gd-1_56.dll!boost::asio::detail::winsock_init<2,0>::winsock_init<2,0>(bool allow_throw) Line 57 + 0xe bytes C++* *> boost_log-vc100-mt-gd-1_56.dll!boost::asio::detail::`dynamic initializer for 'winsock_init_instance''() Line 116 + 0x1c bytes C++* * MSVCR100D.dll!_initterm(void (void)* * pfbegin, void (void)* * pfend) Line 873 C* * boost_log-vc100-mt-gd-1_56.dll!_CRT_INIT(void * hDllHandle, unsigned long dwReason, void * lpreserved) Line 284 + 0xf bytes C* * boost_log-vc100-mt-gd-1_56.dll!__DllMainCRTStartup(void * hDllHandle, unsigned long dwReason, void * lpreserved) Line 506 + 0x11 bytes C* * boost_log-vc100-mt-gd-1_56.dll!_DllMainCRTStartup(void * hDllHandle, unsigned long dwReason, void * lpreserved) Line 476 + 0x11 bytes C* * ntdll.dll!77a112f4() * * ntdll.dll!779f906b() * * ntdll.dll!77a016d2() * * ntdll.dll!779fbf5a() *

2 1

[thread] Specific old move semantics usage
by Vicente J. Botet Escriba 27 Sep '14

27 Sep '14

Hi all, I would like to remove the specific move semantics included in Boost.Thread as it was flawed. This has been replaced by the Boost.Move one long time ago. Is there someone still using it? Could I at least define by the default (even for BOOST_THREAD_VERSION 2) BOOST_THREAD_USES_MOVE for Boost 1.57? Best, Vicente

1 0

Using boost::xpressing on Windows Store
by Paula Stanciu 27 Sep '14

27 Sep '14

Hello, I'm trying to use boost::xpressive on Windows Store and I ran into the following problem: Because _WIN32 is defined BOOST_XPRESSIVE_HAS_MS_STACK_GUARD gets defined and that causes the use of _resetstkoflw() that is not defined for windows sore ( http://msdn.microsoft.com/library/windows/apps/jj606124.aspx ) and so I cannot compile the code that uses boost::xpressive. I think BOOST_XPRESSIVE_HAS_MS_STACK_GUARD should not be defined for Windows store since it does not support _resetstkoflw() ? Any idea how I can solve this issue? Would it be the right thing to undefine this for Windows Store ? Thanks, Paula

3 2

Re: [Boost-users] Using boost::xpressive on Windows Store
by Paula Stanciu 27 Sep '14

27 Sep '14

Thanks Eric. Yes, it's if the WINAPI_FAMILY is set to WINAPI_PARTION_APP. Should I submit a patch with the changes I think should be done in this case ? It's actually just adding and extra check in xpressive_fwd.hpp before BOOST_XPRESSIVE_HAS_MS_STACK_ GUARD is defined. ( e.g. (WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)) ) Best regards, Paula On Fri, Sep 26, 2014 at 6:19 PM, Eric Niebler <eniebler(a)boost.org> wrote: > On 9/26/2014 8:03 AM, Paula Stanciu wrote: > > Hello, > > > > I'm trying to use boost::xpressive on Windows Store and I ran into the > > following problem: > > > > Because _WIN32 is defined BOOST_XPRESSIVE_HAS_MS_STACK_GUARD gets > > defined and that causes the use of _resetstkoflw() that is not defined > > for windows sore ( > > http://msdn.microsoft.com/library/windows/apps/jj606124.aspx ) and so I > > cannot compile the code that uses boost::xpressive. > > > > I think BOOST_XPRESSIVE_HAS_MS_STACK_GUARD should not be defined for > > Windows store since it does not support _resetstkoflw() ? Any idea how I > > can solve this issue? Would it be the right thing to undefine this for > > Windows Store ? > > Sure. Is there some #define a program can check to see if it's being > compiled for Windows Store? > > Eric > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

1 0

BOOST_PP_ERROR(0x0003, BOOST_PP_REPEAT_OVERFLOW) with multiply nested BOOST_PP_REPEATS
by Colin Fowler 26 Sep '14

26 Sep '14

I'm having a problem with multiple nested repeats. I need to generate int x_0_0_0_0 to int x_a_b_c_d. Attempting to do so results in a BOOST_PP_ERROR. For readability, a few shorter defines #define TUPLE_ELEM BOOST_PP_TUPLE_ELEM #define REPEAT BOOST_PP_REPEAT and I also neglect the necessary BOOST_PP_CAT statements in DECL4D in this example #define DECL4D(z, n, text) TUPLE_ELEM(3, text) TUPLE_ELEM(0, text) TUPLE_ELEM(1, text) TUPLE_ELEM(2, text) n; #define DECL4C(z, n, text) REPEAT(TUPLE_ELEM(0, text), DECL4D, (TUPLE_ELEM(1, text), TUPLE_ELEM(2, text), n, TUPLE_ELEM(3, text))) #define DECL4B(z, n, text) REPEAT(TUPLE_ELEM(0, text), DECL4C, (TUPLE_ELEM(1, text), TUPLE_ELEM(2, text), n, TUPLE_ELEM(3, text))) #define DECL4A(z, n, text) REPEAT(TUPLE_ELEM(0, text), DECL4B, (TUPLE_ELEM(1, text), TUPLE_ELEM(2, text), n, TUPLE_ELEM(3, text))) #define decl4(a, b, c, d, text) REPEAT(a, DECL4A, (b, c, d, text)) decl4(1, 1, 1, 1, int x_) Am I hitting a nesting depth limit or something else? Is there a way around this? Ideally I want to write a decl5 macro and have successfully written a decl1, decl2 and decl3 so far Regards, Colin

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[fusion] problem converting the result of a transform of a set into a map
by Christian Kerl 26 Sep '14

26 Sep '14

Hello everybody, I've a problem with the boost fusion library. I try to convert a fusion set into a map using the transform algorithm. Here is a example: typedef typename boost::fusion::result_of::as_map< typename boost::fusion::result_of::transform<BoundMembers, map_name_to_member>::type >::type Content; where BoundMembers is a boost::fusion::set and map_name_to_member is defined as: struct map_name_to_member { template <typename T> struct result; template <class F, typename T> struct result<F(T)> { typedef boost::fusion::pair<typename T::Name, typename T::Member> type; }; }; With boost 1.56 and gcc 4.8.1 I get the following compilation error: include/boost/fusion/iterator/key_of.hpp:36:16: error: invalid use of incomplete type ‘struct boost::fusion::extension::key_of_impl<boost::fusion::transform_view_iterator_tag>’ struct key_of ^ include/boost/fusion/iterator/key_of.hpp:21:16: error: declaration of ‘struct boost::fusion::extension::key_of_impl<boost::fusion::transform_view_iterator_tag>’ struct key_of_impl; However, this code used to work with Boost 1.48. I found a workaround to fix this, by converting the result of transform to a fusion list before coverting it to a map, i.e.: typedef typename boost::fusion::result_of::as_map< typename boost::fusion::result_of::as_list< typename boost::fusion::result_of::transform<BoundMembers, internal::map_name_to_member>::type >::type >::type Content; Am I doing something wrong or is this intended behavior? Thanks for your support. Best regards, Christian Kerl

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Re: [Boost-users] boost logger architecture
by Savva Kuznetsov 26 Sep '14

26 Sep '14

Hi, Tony. It would be great to have an opportunity to know which file is currently being used for logging and set another, for example. Also, we want to control logs rotation and set conditions in which current file must be stored into collection, and create new file with the same name. It would be much easier task and I guess it would be the true boost-style, if boost\log\sinks\text_file_backend.cpp was not hiding a lot of definitions and class interfaces. S.K.

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boost logger architecture.
by Savva Kuznetsov 25 Sep '14

25 Sep '14

Hello, guys. This post is almost the entire duplicate of my Ticket #10524. We're using boost logger in our application and it's really great boost library part. But, we need to change some of it's functionality. Actually, we need to add some lines of code in a method of collector class (for example, file_collector from boost\log\sinks\text_file_backend.cpp) I guess the right way to do this is inheritance from file_collector class and redefinition of it's members functions. But, since it's entire declaration and definition are in text_file_backend.cpp file in an anonymous namespace, it's impossible. Also, it would be cool to use some functions that this class uses (these functions are in text_file_backend.cpp file too for some unknown reason). The only solution I see is to copy-and-paste the entire file_collector class code from boost\log\sinks\text_file_backend.cpp and rewrite some of it's methods content, but, it's obviously wrong and not beautiful way (not boost-way). I guess boost must provide an extensible way to do things. Is there any reason that the entire class is in text_file_backend.cpp file or maybe I am missing something? My ticket have been closed by the author of logger with the comment: "file_collector in text_file_backend.cpp is not designed to be extensible because the interface for the extension is not clear. This made the implementation simpler." It's kinda strange reason, is it?

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List of supported locales and time-zones
by niXman 25 Sep '14

25 Sep '14

Hi, Can somebody tell me please, how can I get a list of supported locale names and time-zones using boost.locale? Thanks. -- Regards, niXman ___________________________________________________ Dual-target(32 & 64-bit) MinGW-W64 compilers for 32 and 64-bit Windows: http://sourceforge.net/projects/mingw-w64/ ___________________________________________________ Another online IDE: http://liveworkspace.org/

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boost.python built with VC2010
by Mohammed El-Afifi 25 Sep '14

25 Sep '14

Hello, I have successfully built boost.python with visual c++ 2010(dynamic library, 64-bit). I have python 2.7.8 64-bit installed on windows 7 64-bit. I've read here https://docs.python.org/2/distutils/apiref.html#module-distutils.msvccompil… that python extensions should be built with the same compiler that was used to build python itself. My question is, since python 2.7.8 was built with visual c++ 2008 64-bit compiler, can I have the following mix a) my python extension built with VC2008 64-bit(to match python itself) b) 64-bit boost.python dll built with VC2010 64-bit c) python 64-bit, built itself with VC2008 64-bit? I've noticed that boost.python dll depends on python dll and that's why I'm quite worried about the mix. Appreciating your insights.

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[boost/config] BOOST_LIKELY argument requirements
by Stephan Bergmann 25 Sep '14

25 Sep '14

Looking at the definition of BOOST_LIKELY as #define BOOST_LIKELY(x) __builtin_expect(x, 1) in boost/config/compiler/{clang,intel,gcc}.hpp, and given that at lest the GCC and Clang __builtin_expect has a first parameter of type long, I wonder (1) whether it would be better to define it as #define BOOST_LIKELY(x) __builtin_expect(bool(x), 1) so that > $ cat test.cc > #include "boost/config.hpp" > #include "boost/logic/tribool.hpp" > int f(boost::tribool b1, boost::tribool b2) { > if (b1) return 1; > else if (BOOST_LIKELY(b2)) return 2; > else return 3; > } > > $ g++ -c test.cc > In file included from .../boost_1_56_0/boost/config.hpp:39:0, > from test.cc:1: > test.cc: In function ‘int f(boost::logic::tribool, boost::logic::tribool)’: > .../boost_1_56_0/boost/config/compiler/gcc.hpp:90:46: error: cannot convert ‘boost::logic::tribool’ to ‘long int’ for argument ‘1’ to ‘long int __builtin_expect(long int, long int)’ > #define BOOST_LIKELY(x) __builtin_expect(x, 1) > ^ > test.cc:5:14: note: in expansion of macro ‘BOOST_LIKELY’ > else if (BOOST_LIKELY(b2)) return 2; > ^ would not fail (effectively changing the requirement for the argument to BOOST_LIKELY from "[the] expression should result in a boolean value" to "it should be contextually convertible to bool"). (2) if not that, whether to at least wrap the expansion of x in parentheses, #define BOOST_LIKELY(x) __builtin_expect((x), 1) Stephan

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[assign][ptr_container] Exception safety of ptr_list_of, ptr_push_back, ptr_map_insert, etc.
by Aaron Levy 25 Sep '14

25 Sep '14

I am trying to understand how ptr_list_of or ptr_push_back provide more exception safety. I can write something like: boost::ptr_vector<Foo> vec; push_back(vec)(new Foo)(new Foo); Is the order of evaluation of the two "new Foo" expressions indeterminate here? If not, then if the second new throws, the destructor of vec should be invoked. The Foo object allocated by the first new and now part of vec should also get released as part of that. -- Aaron Levy aaron.levy(a)yandex.com

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[Log] reversed file rotation order...
by Ovanes Markarian 24 Sep '14

24 Sep '14

Hi *, We use file rotation with boost log, since I work more and with Python I use Python's logging as well. One interesting feature I observed was that Python's logger does reversed file rotation. Is that sort of feature implemented with boost::log library? In boost the rotation is: whatever_0.log < oldest file whatever_1.log whatever_2.log < newest file In Python the rotation order is: whatever_0.log < newest file whatever_1.log whatever_2.log < oldest file I think this is a very cool how Python does it, since I am able to endlessly "tail" in the shell the log file: tail -f whatever_0.log will not stop until I cancel the tail operation. With boot it is like, logger writes a new file and tail hangs with the file which is no longer written. This is a bit unusable and confusing. Would be great if that'd be possible in boost. Thanks, Ovanes

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Problems Linking with Boost Serialization
by Isaac Lascasas 24 Sep '14

24 Sep '14

I have found this on boost 1.56 with msvc12: Error 119 error LNK2005: "bool __cdecl boost::archive::detail::is_whitespace<char>(char)" (??$is_whitespace@D @detail@archive@boost@@YA_ND@Z) already defined in libboost_wserialization-vc120-mt-1_56.lib(basic_text_wiprimitive.obj) C:\supernova\sb6\src\supernova_clr\libboost_serialization-vc120-mt-1_56.lib(basic_text_iprimitive.obj) Error 120 error LNK2005: "bool __cdecl boost::archive::detail::is_whitespace<wchar_t>(wchar_t)" (??$is_whitespace@ _W@detail@archive@boost@@YA_N_W@Z) already defined in libboost_wserialization-vc120-mt-1_56.lib(basic_text_wiprimitive.obj) C:\supernova\sb6\src\supernova_clr\libboost_serialization-vc120-mt-1_56.lib(basic_text_iprimitive.obj) This code used to link fine with previous boost versions. Now it looks like you can't use both archive and warchive at the same time. I'm using xml warchives for serializing in my code. Regards. Isaac Lascasas.

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Boost::Locale jam file seems to be outdated for ICU ver. 53.1
by Caroline Beltran 24 Sep '14

24 Sep '14

I'm using Boost::Locale (and ICU) for the first time but I strongly believe that the jam file is referencing old ICU dll filenames. Current ICU dlls: icuucd53.dll icudt53.dll icuind53.dll icuin53.dll Relevant snippet from jam file (Boost 1.56): searched-lib icuuc : : <toolset>msvc <variant>debug <name>icuucd <search>$(ICU_PATH)/lib <link>shared <runtime-link>shared ; To me it appears that the snippet above is referring to icuucd when it should be referring to icuucd53. I've been trying really hard to get Boost::Locale going on my system. I updated all references to dlls and this is the result of the config test. As you can see, I am not linking with ICU (even though ICU was installed correctly and ICU test results were successful). I think that the jam file may need further changes. Please advise. D:\boost_1_56_0\stage\lib>test_config - Backends: std winapi - Without iconv - Environment LANG= LC_ALL= LC_CTYPE= TZ= - C locale: English_United States.1252 - C++ locale: English_United States.1252 - Testing locales availability on the operation system: locale C C++ en_US.UTF-8 No No en_US.ISO8859-1 No No English_United States.1252 Yes Yes he_IL.UTF-8 No No he_IL.ISO8859-8 No No Hebrew_Israel.1255 Yes Yes ru_RU.UTF-8 No No Russian_Russia.1251 Yes Yes tr_TR.UTF-8 No No Turkish_Turkey.1254 Yes Yes ja_JP.UTF-8 No No ja_JP.SJIS No No Japanese_Japan.932 Yes Yes - Testing timezone and time Local Time :%c=09/23/14 15:18:07; %Z=Central Daylight Time (Mexico); %z=Central Daylight Time (Mexico) Universal Time:%c=09/23/14 20:18:07; %Z=Central Standard Time (Mexico); %z=Central Standard Time (Mexico) - Boost.Locale's locale: en_US.UTF-8

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Adding more than 20 rows in transition table for Boost::MSM
by Yechiel Levi 23 Sep '14

23 Sep '14

Hi, I tried defining: #define BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #define BOOST_MPL_LIMIT_VECTOR_SIZE 30 // or whatever you need #define BOOST_MPL_LIMIT_MAP_SIZE 30 // or whatever you need /// Boost-MSM Includes // back-end #include "boost/mpl/vector/vector30.hpp" #include <boost/msm/back/state_machine.hpp> //front-end #include <boost/msm/front/state_machine_def.hpp> #include <boost/msm/front/functor_row.hpp> #include <boost/any.hpp> // for And_ operator #include <boost/msm/front/euml/operator.hpp> And i still get the following errors: builder1: In file included from /usr/local/include/boost/mpl/erase.hpp:19, builder1: from /usr/local/include/boost/fusion/mpl/erase.hpp:10, builder1: from /usr/local/include/boost/fusion/mpl.hpp:20, builder1: from /usr/local/include/boost/fusion/include/mpl.hpp:11, builder1: from /usr/local/include/boost/msm/back/state_machine.hpp:30, builder1: from File_Meta_FSM.h:18, builder1: from Open_Files_Mng.h:5, builder1: from Open_Files_Mng.cpp:1: builder1: /usr/local/include/boost/mpl/aux_/erase_impl.hpp:56: error: ‘_’ was not declared in this scope builder1: /usr/local/include/boost/mpl/aux_/erase_impl.hpp:56: error: ‘_’ was not declared in this scope builder1: /usr/local/include/boost/mpl/aux_/erase_impl.hpp:56: error: template argument 1 is invalid builder1: /usr/local/include/boost/mpl/aux_/erase_impl.hpp:56: error: template argument 2 is invalid builder1: /usr/local/include/boost/mpl/aux_/erase_impl.hpp:57: error: template argument 3 is invalid builder1: /usr/local/include/boost/mpl/aux_/erase_impl.hpp:62: error: ‘_’ was not declared in this scope builder1: /usr/local/include/boost/mpl/aux_/erase_impl.hpp:62: error: ‘_’ was not declared in this scope builder1: /usr/local/include/boost/mpl/aux_/erase_impl.hpp:62: error: template argument 1 is invalid builder1: /usr/local/include/boost/mpl/aux_/erase_impl.hpp:62: error: template argument 2 is invalid builder1: /usr/local/include/boost/mpl/aux_/erase_impl.hpp:63: error: template argument 3 is invalid and more of the same errors.. -- Kind regards, Yechiel Levi

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