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C++ committee calling for lib proposals
by Noe Casas Manzanares 05 Mar '12

05 Mar '12

The C++ committee is calling for library proposals for their inclusion in C++11: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3370.html . I think some of the boost libraries are good candidates, like the recently accepted boost::lockfree. Has anyone considered sending such proposal?

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Re: [Boost-users] Boost-users Digest, Vol 3016, Issue 2
by Andrew Maclean 04 Mar '12

04 Mar '12

> > ---------- Forwarded message ---------- > From: Barend Gehrels <barend(a)xs4all.nl> > To: boost-users(a)lists.boost.org > Cc: > Date: Sun, 04 Mar 2012 18:01:52 +0100 > Subject: Re: [Boost-users] [Geometry] Calculating distances on the earth > Hi Sean, > > On 4-3-2012 17:14, Sean Farrow wrote: > > Hi all:**** > > I need to calculate distances on the earth. Ideally I’d like to use the > haversine formula.**** > > There is an example in the docs at:**** > > > http://www.boost.org/doc/libs/1_49_0/libs/geometry/doc/html/geometry/quicks… > **** > > under the non-Cartesian heading.**** > > Will this do what I need, or do I need the Geographical coordinate system, > (if yes where is this available and what features does this supply?)**** > > > This will do what you ask for. So it will calculate distances on the Earth > using the Haversine formula. > > However, it considers the Earth as a perfect sphere, which it is not. So > distances are rough approximations. > > If you need more precise results indeed you will need the Geographic > coordinate system, and the distances then use Andoyer which is much more > precise. > > That is not included in the current Release. So if you need it you have to > download the Trunk of Boost, and it is there available as an extension. > > See the examples here: > > https://svn.boost.org/svn/boost/trunk/libs/geometry/example_extensions/gis/… > > Regards, Barend > > > > > ---------- Forwarded message ---------- > From: Sean Farrow <sean.farrow(a)seanfarrow.co.uk> > To: "boost-users(a)lists.boost.org" <boost-users(a)lists.boost.org> > Cc: > Date: Sun, 4 Mar 2012 17:13:21 +0000 > Subject: Re: [Boost-users] [Geometry] Calculating distances on the earth > > Hi: **** > > Ok, thanks, What (roughly) is the difference in precision? I’m using this > to determine the distance between two buildings.**** > > Cheers**** > > Sean.**** > > ** ** > > *From:* boost-users-bounces(a)lists.boost.org [mailto: > boost-users-bounces(a)lists.boost.org] *On Behalf Of *Barend Gehrels > *Sent:* 04 March 2012 17:02 > *To:* boost-users(a)lists.boost.org > *Subject:* Re: [Boost-users] [Geometry] Calculating distances on the earth > **** > > ** ** > > Hi Sean, > > On 4-3-2012 17:14, Sean Farrow wrote: **** > > Hi all:**** > > I need to calculate distances on the earth. Ideally I’d like to use the > haversine formula.**** > > There is an example in the docs at:**** > > > http://www.boost.org/doc/libs/1_49_0/libs/geometry/doc/html/geometry/quicks… > **** > > under the non-Cartesian heading.**** > > Will this do what I need, or do I need the Geographical coordinate system, > (if yes where is this available and what features does this supply?)**** > > > This will do what you ask for. So it will calculate distances on the Earth > using the Haversine formula. > > However, it considers the Earth as a perfect sphere, which it is not. So > distances are rough approximations. > > If you need more precise results indeed you will need the Geographic > coordinate system, and the distances then use Andoyer which is much more > precise. > > That is not included in the current Release. So if you need it you have to > download the Trunk of Boost, and it is there available as an extension. > > See the examples here: > > https://svn.boost.org/svn/boost/trunk/libs/geometry/example_extensions/gis/… > > Regards, Barend > > **** > > > ---------- Forwarded message ---------- > From: Barend Gehrels <barend(a)xs4all.nl> > To: boost-users(a)lists.boost.org > Cc: > Date: Sun, 04 Mar 2012 18:36:11 +0100 > Subject: Re: [Boost-users] [Geometry] Calculating distances on the earth > Hi Sean, > > On 4-3-2012 18:13, Sean Farrow wrote: > > Hi: **** > > Ok, thanks, What (roughly) is the difference in precision? I’m using this > to determine the distance between two buildings.**** > > > The sampes give an idea, but that is between cities (miles away). Between > buildings the difference will be less, but I've not tested it. So the best > is to test that yourself (and the results are interesting for the list ;-) ) > > Regards, Barend > > > > ---------- Forwarded message ---------- > From: Sean Farrow <sean.farrow(a)seanfarrow.co.uk> > To: "boost-users(a)lists.boost.org" <boost-users(a)lists.boost.org> > Cc: > Date: Sun, 4 Mar 2012 17:49:04 +0000 > Subject: Re: [Boost-users] [Geometry] Calculating distances on the earth > > Hi: **** > > I’ll test this and get back to the list. Do we have any idea as to > whether/when the extension(s) will become part of the official distribution? > **** > > Cheers**** > > Sean.**** > > *From:* boost-users-bounces(a)lists.boost.org [mailto: > boost-users-bounces(a)lists.boost.org] *On Behalf Of *Barend Gehrels > *Sent:* 04 March 2012 17:36 > *To:* boost-users(a)lists.boost.org > *Subject:* Re: [Boost-users] [Geometry] Calculating distances on the earth > **** > > ** ** > > Hi Sean, > > On 4-3-2012 18:13, Sean Farrow wrote: **** > > Hi: **** > > Ok, thanks, What (roughly) is the difference in precision? I’m using this > to determine the distance between two buildings.**** > > > The sampes give an idea, but that is between cities (miles away). Between > buildings the difference will be less, but I've not tested it. So the best > is to test that yourself (and the results are interesting for the list ;-) ) > > Regards, Barend**** > > If you are using latitude/longitude then these methods will work: 1) Consider implementing Vincentys method, proposed by Thaddeus Vincenty, and is documented at http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf, I believe this has a precision of around 0.5mm. Be careful to avoid domain errors near the poles. This has the advantage of also calculating forward and back azimuth. 2) Andoyer's method which also takes flattening into account but loses precision for very short distances. Alternatively since you are working with short distances implement Redfearn's formulae to generate UTM coordinates and then use planar geometry. For more information see: http://www.ga.gov.au/geodesy/datums/calcs.jsp#trans There is a pdf manual (containing all the formulae) ( http://www.icsm.gov.au/gda/gdatm/index.html) and excel worksheets along with on-line calculators that you can use here. Regards Andrew -- ___________________________________________ Andrew J. P. Maclean ___________________________________________

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[function_types] comparing arity
by Jeff Flinn 03 Mar '12

03 Mar '12

I'm trying to come up with the condition for an enable_if condition based on the function_arity of a signature. The following fails to compile: bool z = boost::mpl::equal_to < boost::function_types::function_arity<SIG>::value , boost::mpl::int_<3> >; Any help is appreciated. Thanks, Jeff

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enable_if and templated operator() of member of class template
by MM 02 Mar '12

02 Mar '12

Hello, I am using the enable_if construct to disable an operator() template member function of a templated variant visitor: template <typename iter_t> class iterator_compare_visitor_ : public boost::static_visitor<bool> { public: iterator_compare_visitor_(const iter_t& to_compare_to) : to_compare_to_(to_compare_to) {} template <typename variant_iter_t> typename std::enable_if< boost::mpl::contains<const_iterators_t, iter_t>::value, bool >::type operator()(const variant_iter_t& it) const { return std::is_same<variant_iter_t, iter_t>::value && it==to_compare_to_; } template <typename variant_iter_t> typename std::enable_if< boost::mpl::contains<const_reverse_iterators_t, iter_t>::value, bool >::type operator()(const variant_iter_t& it) const { return std::is_same<variant_iter_t, iter_t>::value && it==to_compare_to_.base(); } private: const iter_t& to_compare_to_; }; The compilation fails in msvc2010 with: error C2039: 'type' : is not a member of 'std::tr1::enable_if<_Test,_Type>' 1> with 1> [ 1> _Test=false, 1> _Type=bool 1> ] in this case, iter_t is not contained in const_reverse_iterators_t and so the 2nd operator() should not be enabled. Rds, MM

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Using boost::container::map on OpenVMS
by De Rudder, Stephen L. 02 Mar '12

02 Mar '12

I am trying to get the boost::container::map to work on OpenVMS (Alpha). I am getting an %CXX-E-BADBASECLS, (1) invalid base class error but have not been able to track it down. If I use std::map instead of boost::container::map in the code then it will work btw. Thanks for any help, SLDR (Stephen L. De Rudder) rdls22 AT tditx.com More Info: OpenVMS V8.2 on Alpha $ cxx /ver HP C++ V7.3-009 for OpenVMS Alpha V8.2 The compile command I am using is: $ cxx/stand=strict_ansi/list/show=all/inc=userdisk4:[boost_1_49_0] t.cpp I have enclosed the example code and the section of the listing output from the cxx compile. #include <tree> #include <stdio.h> #include <stdlib.h> #include <boost/container/string.hpp> #include <boost/container/map.hpp> #define cwstring std::string class SecPrivOrderRec { public: boost::container::map<long, bool> orderMap; //map order -> grant }; class SecPrivOrderMap { public: boost::container::map<long, SecPrivOrderRec> privMap; //map priv -> order/grant }; class SecUserProfCompPrivMap { public: SecUserProfCompPrivMap(); bool valid; SecPrivOrderMap keyPrivMap; // map priv -> order }; SecUserProfCompPrivMap::SecUserProfCompPrivMap() { this->valid = false; } class SecUserProfPrivMap { public: SecUserProfPrivMap(); bool valid; boost::container::map<long, long> compPrivMap; // map priv -> order boost::container::map<cwstring, SecUserProfCompPrivMap> keyMap; // map comp -> key }; SecUserProfPrivMap::SecUserProfPrivMap() { this->valid = false; } class SecUserProfMap { public: boost::container::map<cwstring, SecUserProfPrivMap> compMap; // map comp -> priv }; int main(int argc, char **argv) { boost::container::map<std::string, int> j1; j1["foobar"]=22; boost::container::map<cwstring, SecUserProfMap> userProfileMap; //map profile -> comp -> key -> priv long maxndx = 10000; long maxndx2 = 1; int testtype = 0; char ndxstr[16]; cwstring s1 = "my_large_test_user"; cwstring s2 = "this_is_a_key"; cwstring s3; //fprintf(stderr,"Running test type 0 -- expected to consume 10x memory\n"); for (long ndx = 0; ndx < maxndx; ndx++) { //sprintf(ndxstr, "%d", ndx); for (long ndx2 = 0; ndx2 < maxndx2; ndx2++) { s3 = ndxstr; userProfileMap[s1].compMap[s2].keyMap[s3].keyPrivMap.privMap[ndx2].orderMap[1] = true; } } } ========================================================================================================= Source Listing 2-MAR-2012 10:49:24 HP C++ V7.3-009 Page 1910 1-JAN-2012 13:14:12 has_member_function_callable_with.hpp;1 I6 92339 ␍ I6 92340 BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_NS_BEGIN␍ E namespace boost { namespace container { namespace container_detail { I6 92341 ␍ I6 92342 template <typename Type>␍ I6 92343 class BOOST_PP_CAT(has_member_function_named_, BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_FUNCNAME)␍ E class has_member_function_named_select_on_container_copy_construction I6 92344 {␍ I6 92345 struct BaseMixin␍ I6 92346 {␍ I6 92347 void BOOST_INTRUSIVE_HAS_MEMBER_FUNCTION_CALLABLE_WITH_FUNCNAME();␍ E void select_on_container_copy_construction(); I6 92348 };␍ I6 92349 ␍ I6 92350 struct Base : public Type, public BaseMixin { Base(); };␍ ..............................1 %CXX-E-BADBASECLS, (1) invalid base class detected during: instantiation of class "boost::container::container_detail::has_member_function_ named_select_on_container_copy_construction<Type>::Base [with Type=const boost::container::container_detail::node_alloc_holder<std ::allocator<std::pair<const std::string, SecUserProfPrivMap>>, boost::container::container_detail::intrusive_rbtree_type <std::allocator<std::pair<const std::string, SecUserProfPrivMap>>, boost::container::container_detail::value_compare_impl<st d::string, std::pair<const std::string, SecUserProfPrivMap>, std::less<std::string>, boost::container::container_detail::select1st<std::pair<c onst std::string, SecUserProfPrivMap>>>>::type, std::less<std::string>>::NodeAlloc]" at line 98 of "USERDISK4:[DERUDDER.BOOST_1_49_0.BOOST.INTRUSIVE.DETAIL] has_member_function_callable_with.hpp;1"

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How to assign a preallocated buffer boost::format?
by niXman 02 Mar '12

02 Mar '12

Hello, I need to assign a preallocated buffer for the boost::format. Any ideas? Thanks. -- Regards, niXman

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Re: [Boost-users] Interprocess container segmentation fault (example provided)
by Davidson, Josh 02 Mar '12

02 Mar '12

Ion, Terribly sorry, but I goofed when I cobbled that code together. My actual application constructs "TestStore" from the segment, and not on the stack like what I pasted in before. I'm including the full test code again, although only the main function changed. Since the map itself a member of TestStore and TestStore is being constructed from the segment, I would think that should be roughly equivalent to just creating the map by itself from the segment. However, as you'll see if you run it, it still seg faults when accessing the list iterator. ===================================== BEGIN CODE============================================== #include <stdint.h> #include <cstddef> #include <string> #include <functional> #include <iostream> #include <utility> using std::cerr; using std::endl; using std::pair; #include <boost/interprocess/managed_shared_memory.hpp> #include <boost/interprocess/allocators/allocator.hpp> #include <boost/interprocess/offset_ptr.hpp> #include <boost/interprocess/containers/string.hpp> #include <boost/interprocess/containers/list.hpp> #include <boost/interprocess/containers/map.hpp> #include <boost/ref.hpp> using namespace boost::interprocess; class SharedMemoryDeleter { public: SharedMemoryDeleter(const std::string& name) : mName(name) { shared_memory_object::remove(mName.c_str()); } ~SharedMemoryDeleter() { shared_memory_object::remove(mName.c_str()); } protected: std::string mName; }; class TestStore { public: struct TestData { uint16_t commandStatus; size_t wordCount; uint16_t data[32]; }; ///Allocates characters in shared memory typedef allocator<char, managed_shared_memory::segment_manager> CharAllocator; ///String in shared memory typedef basic_string<char, std::char_traits<char>, CharAllocator> SharedMemoryString; ///Allocates list in shared memory typedef allocator<TestData, managed_shared_memory::segment_manager> ListAllocator; ///List of TestData items in shared memory typedef list<TestData, ListAllocator> SharedMemoryList; ///Key/Value pair for the map (SA, Data List) typedef pair<const unsigned, SharedMemoryList> data_map_value_t; ///Allocates maps in shared memory typedef allocator<data_map_value_t, managed_shared_memory::segment_manager> MapAllocator; ///Maps lists to SAs in shared memory typedef map<unsigned, SharedMemoryList, std::less<unsigned>, MapAllocator> SharedMemoryMap; TestStore(managed_shared_memory& segment, const std::string& name) : mSegment(&segment), mSegmentName(name.c_str(), CharAllocator(mSegment->get_segment_manager())), mData(std::less<unsigned>(), MapAllocator(mSegment->get_segment_manager())){ } /////////////////////////////////////////////////////////////////////////// /// Destructor /////////////////////////////////////////////////////////////////////////// virtual ~TestStore() { } void printData() { TestStore::SharedMemoryMap::iterator it = mData.begin(); while(it != mData.end()) { TestStore::SharedMemoryList::iterator lIt = it->second.begin(); cerr << "SA: " << it->first << endl; cerr << it->second.size() << endl; while (lIt != it->second.end()) { cerr << "\titerating..." << endl; cerr << "wc: " << lIt->wordCount << endl; cerr << "cs: " << lIt->commandStatus << endl; cerr << "\t" << lIt->commandStatus << ", WC: " << lIt->wordCount << endl; ++lIt; } ++it; } cerr << endl; } bool addMessage(unsigned key, const TestData& data) { TestStore::SharedMemoryMap::iterator it = mData.find(key); cerr << "Adding word count " << data.wordCount << endl; if(it != mData.end()) { it->second.push_back(data); } else { cerr << "Looking for " << mSegmentName.c_str() << endl; managed_shared_memory m(open_only, mSegmentName.c_str()); cerr << "found it" << endl; cerr << m.check_sanity() << " - " << m.get_free_memory() << "/" << m.get_size() << endl; cerr << mSegment->check_sanity() << " * " << mSegment->get_free_memory() << "/" << mSegment->get_size() << endl; ///!!!!!!!!!!!!!!!BROKE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! TestStore::SharedMemoryList sList(TestStore::ListAllocator( m.get_segment_manager())); //==========This Works (obviously only for current process)=========== // TestStore::SharedMemoryList sList(TestStore::ListAllocator( // mSegment->get_segment_manager())); sList.push_back(data); cerr << "pushed" << endl; cerr << sList.front().wordCount << endl; mData.insert(TestStore::SharedMemoryMap::value_type(key, sList)); cerr << "added list" << endl; } cerr << "====================Data post add===================" << endl; printData(); return true; } private: ///Segment housing this class. Only valid in the constructing process managed_shared_memory* mSegment; ///Name of the segment SharedMemoryString mSegmentName; SharedMemoryMap mData; }; int main() { std::string segName = "MemSegmentHere"; int num_bytes = 645360; SharedMemoryDeleter deleter(segName); managed_shared_memory shm(open_or_create, segName.c_str(), num_bytes); std::string storeName = "TestStoreHere"; shm.destroy<TestStore>(storeName.c_str()); TestStore* store = shm.construct<TestStore>(storeName.c_str())(boost::ref(shm), boost::ref(segName)); TestStore::TestData data; data.commandStatus = 10; data.wordCount = 14; store->addMessage(3, data); return 0; } -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Ion Gaztañaga Sent: Thursday, March 01, 2012 3:24 PM To: Boost User List Subject: EXTERNAL: Re: [Boost-users] Interprocess container segmentation fault (example provided) El 01/03/2012 19:01, Davidson, Josh escribió: > I'm running into issues with using interprocess containers have other containers added to them during runtime. A very high level description is I have a set of data structures in shared memory that can be accessed and modified by more than one process. I'm creating the data structures in the first process and storing the name of the segment within the data structure. Methods that modify the data by adding another container first lookup the segment using its name, build the new container, and then insert it into the existing container. In the example I'm providing below, I have a map of lists. For some reason, when I add a new list, if I open the segment by name, and allocate the list using the segment manager returned via the lookup, the list isn't initialized correctly and accessing > the list (via printData here) results in a segfault. However, if I bypass the segment lookup and just cache the raw pointer to the segment, it works. It's probably easiest just to look at > the code below. In addMessage, you can see how I'm trying to initialize the list in a manner that will work across multiple processes. This breaks. Commented out directly below it is a hack that will work. I can't see any reason why one works and the other doesn't. The "managed_shared_memory" object returned from the lookup appears to be valid and exactly the same as the pointer I'm caching with the data structure in this example. > > I am currently using 1.49 final, but I've observed similar behavior in other 1.4x releases. You are storing a *local* map that allocates memory in shared memory (that is, the internal pointers of the map are in the stack, whereas the allocated nodes are in shared memory), which is really a bad idea as once you unmap the segment, as the local map's internal pointers point to segmentation-fault friendly memory. I know that "managed_shared_memory shm" outlives "TestStore store" but the problem is that you open the shm again in "managed_shared_memory m" and that maps the shared memory *in another address, different to the address mapped by "managed_shared_memory shm"* (two views of the same shared memory, as you map a file twice). So you end up with a local map pointing to *two different address ranges* (although the share the same underlying shared memory object, just think it's like a file). Then you unmap "managed_shared_memory m" (the second address range disappears) and then when you try to iterate, when the local map tries to read an element through the second address range, you get a segmentation fault. If you put the map itself in shared memory (e.g. use a named construct) you can avoid the problem. And if you have already mapped the shared memory once, avoid wasting OS resources (the OS must synchronize the two address ranges in the same process with the same underlying device/shm/mapped file) and application address space mapping the same shared memory/file several times. Sometimes is useful to open the shared memory segment more than once from the same process (say, when you communicate a DLL with an application, or when trying to implement a intermodule singleton type), but in general, try to avoid this. Best, Ion _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Boost.Interprocess containers question
by Davidson, Josh 02 Mar '12

02 Mar '12

I have an object that I'm storing in shared memory that contains a map data member whose values are lists. The processes that interact with this object don't have direct access to the map data structure. Instead, the object is accessed and modified through its public interface. The issue I am running into is how to handle new key, value insertions. I would prefer to leave the fact that the object is in shared memory an implementation detail, but in order to construct a new list to insert in the map, the list needs to be initialized with an allocator using the segment manger. Unless I pass that segment manager into every method that might add a new list to the map, I'm struggling how to get it working. I can't simply store a pointer to the managed shared memory or segment manager within the class since the address would only be valid in the process that constructed it. The only possible implementations I can think of would be to require passing in the segment manager into all of the methods and then create a simple wrapper class that contains a pointer to this object along with a pointer to the segment manager. The wrapper class would essentially "duplicate" each of the methods in the wrapped class but drop the segement manager parameter since it has it as a member. Processes that "find" this object in shared memory would then be responsible for wrapping it in an object of the wrapper class. The other possible implementation would be to always open the shared memory segment by name before modifying the map. Josh

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Re: [Boost-users] Interprocess container segmentation fault (example provided)
by Davidson, Josh 02 Mar '12

02 Mar '12

> Ion, > Terribly sorry, but I goofed when I cobbled that code together. My actual application constructs "TestStore" from the segment, and not on the stack like what I pasted in before. I'm including the full test code again, although only the main function changed. Since the map itself a member of TestStore and TestStore is being constructed from the segment, I would think that should be roughly equivalent to just creating the map by itself from the segment. However, as you'll see if you run it, it still seg faults when accessing the list iterator. Ok, I had to re-read your message again before it sunk in. While allocating the TestStore on the stack was an obvious issue, I understand now why it still blew up when iterating the list. Also, it looks like I was further complicating things. It appears from my testing that I can store allocator instances in the shared memory segment (e.g. a ListAllocator in TestStore from earlier example) and just use that in addMessage rather than creating a new allocator each time I insert into the map. Thanks, Josh

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[interprocess::offset_ptr] operator>> error in boost_1_46_1
by 乔志强 02 Mar '12

02 Mar '12

#include <boost/interprocess/offset_ptr.hpp> I use boost_1_46_1, boost::interprocess::offset_ptr<int> p; std::cin >> p; // error!! offset_ptr.hpp std::ptrdiff_t get_offset() const { return internal.m_offset; } //!operator>> //!for offset ptr template<class E, class T, class Y> inline std::basic_istream<E, T> & operator>> (std::basic_istream<E, T> & is, offset_ptr<Y> & p) { return is >> p.get_offset(); }

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Is there a self contained vector-like container?
by Frank Birbacher 01 Mar '12

01 Mar '12

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi! Is there in Boost a container that is statically "max sized" and contains its own storage like a std::array, but manages a size and can construct and destruct elements. I guess it would look something like: template<typedef T, size_t N> struct self_contained_vector { size_t max_size() const { return N; } size_t size() const { return size_; } private: size_t size_; aligned_storage<T> data_[N]; //...implement random access container... }; Frank -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: keyserver x-hkp://pool.sks-keyservers.net iEYEARECAAYFAk9P2GcACgkQhAOUmAZhnmqtdACfa6D7j8THF2UtGvTSSHERbffe i6UAn2d+bW1jREGupp1wPMVafXiKQpOm =mwRW -----END PGP SIGNATURE-----

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Iterating over the output of a member function in std::for_each
by Andrew Hundt 01 Mar '12

01 Mar '12

I have a class with an accessor member function that I want to call and apply the result to a functor using std::for_each. I have a working version below that uses a for loop and for_each, but the for_each version is cryptic and cumbersome. Is there a way I can make the for_each version more concise? #if 0 // for loop version: for(value_vector_type::iterator it = values.begin(); it!=values.end(); it++){ avg(it->getValue()); // I want to put this in a for_each loop } #else // bind version: std::for_each(values.begin(), values.end(), // iterate over all values boost::bind( boost::mem_fn(&average_type::operator()), // attach the averaging functor to the output of the getvalue call &avg, boost::bind( boost::mem_fn(&value_wrapper_type::getValue), // bind the getValue call to each element in values _1 ) ) ); #endif I also have the question posted in stack overflow, with a full implementation: http://stackoverflow.com/questions/9507830/iterating-over-the-output-of-a-m… Cheers! Andrew Hundt

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Graph: writing graph properties to graphml file
by Juerg Tschirren 01 Mar '12

01 Mar '12

I wrote the code below to construct a directed graph with internal properties (for vertices, edges, and the graph itself) and write everything to a graphml file. The code compiles and works as it is, but my two questions are: 1. What dynamic property do I have to add to write the graph properties out to the graphml file as well? So far I could only figure out how to write vertex and edge properties. 2. Does everything else look good? Specifically, is it O.K. to define the properties the way I did in the first typedef line (without using boost::property<>), and is it O.K. to access the properties the way I do it? Juerg //--- start of example code typedef boost::adjacency_list<boost::listS, boost::vecS, boost::directedS, std::string, std::string, std::string> Graph; typedef boost::graph_traits<Graph>::vertex_descriptor vertex_t; typedef boost::graph_traits<Graph>::edge_descriptor edge_t; Graph g; vertex_t u = boost::add_vertex(g); vertex_t v = boost::add_vertex(g); edge_t e; bool b; boost::tie(e,b) = boost::add_edge(u,v,g); g[u] = "a_vertex_name"; g[v] = "an_other_vertex_name"; g[e] = "an_edge_name"; boost::get_property(g) = "the_graph"; boost::dynamic_properties dp; dp.property("vertex_data", boost::get(boost::vertex_bundle, g)); dp.property("edge_data", boost::get(boost::edge_bundle, g)); std::ofstream graphmlOutFile("graph.xml"); boost::write_graphml(graphmlOutFile, g, dp, true); graphmlOutFile.close();

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Interprocess container segmentation fault (example provided)
by Davidson, Josh 01 Mar '12

01 Mar '12

I'm running into issues with using interprocess containers have other containers added to them during runtime. A very high level description is I have a set of data structures in shared memory that can be accessed and modified by more than one process. I'm creating the data structures in the first process and storing the name of the segment within the data structure. Methods that modify the data by adding another container first lookup the segment using its name, build the new container, and then insert it into the existing container. In the example I'm providing below, I have a map of lists. For some reason, when I add a new list, if I open the segment by name, and allocate the list using the segment manager returned via the lookup, the list isn't initialized correctly and accessing the list (via printData here) results in a segfault. However, if I bypass the segment lookup and just cache the raw pointer to the segment, it works. It's probably easiest just to look at the code below. In addMessage, you can see how I'm trying to initialize the list in a manner that will work across multiple processes. This breaks. Commented out directly below it is a hack that will work. I can't see any reason why one works and the other doesn't. The "managed_shared_memory" object returned from the lookup appears to be valid and exactly the same as the pointer I'm caching with the data structure in this example. I am currently using 1.49 final, but I've observed similar behavior in other 1.4x releases. =================================BEGIN CODE==================================================== #include <stdint.h> #include <cstddef> #include <string> #include <functional> #include <iostream> #include <utility> using std::cerr; using std::endl; using std::pair; #include <boost/interprocess/managed_shared_memory.hpp> #include <boost/interprocess/allocators/allocator.hpp> #include <boost/interprocess/offset_ptr.hpp> #include <boost/interprocess/containers/string.hpp> #include <boost/interprocess/containers/list.hpp> #include <boost/interprocess/containers/map.hpp> #include <boost/ref.hpp> using namespace boost::interprocess; class SharedMemoryDeleter { public: SharedMemoryDeleter(const std::string& name) : mName(name) { shared_memory_object::remove(mName.c_str()); } ~SharedMemoryDeleter() { shared_memory_object::remove(mName.c_str()); } protected: std::string mName; }; class TestStore { public: struct TestData { uint16_t commandStatus; size_t wordCount; uint16_t data[32]; }; ///Allocates characters in shared memory typedef allocator<char, managed_shared_memory::segment_manager> CharAllocator; ///String in shared memory typedef basic_string<char, std::char_traits<char>, CharAllocator> SharedMemoryString; ///Allocates list in shared memory typedef allocator<TestData, managed_shared_memory::segment_manager> ListAllocator; ///List of TestData items in shared memory typedef list<TestData, ListAllocator> SharedMemoryList; ///Key/Value pair for the map (SA, Data List) typedef pair<const unsigned, SharedMemoryList> data_map_value_t; ///Allocates maps in shared memory typedef allocator<data_map_value_t, managed_shared_memory::segment_manager> MapAllocator; ///Maps lists to SAs in shared memory typedef map<unsigned, SharedMemoryList, std::less<unsigned>, MapAllocator> SharedMemoryMap; TestStore(managed_shared_memory& segment, const std::string& name) : mSegment(&segment), mSegmentName(name.c_str(), CharAllocator(mSegment->get_segment_manager())), mData(std::less<unsigned>(), MapAllocator(mSegment->get_segment_manager())){ } /////////////////////////////////////////////////////////////////////////// /// Destructor /////////////////////////////////////////////////////////////////////////// virtual ~TestStore() { } void printData() { TestStore::SharedMemoryMap::iterator it = mData.begin(); while(it != mData.end()) { TestStore::SharedMemoryList::iterator lIt = it->second.begin(); cerr << "SA: " << it->first << endl; cerr << it->second.size() << endl; while (lIt != it->second.end()) { cerr << "\titerating..." << endl; cerr << "wc: " << lIt->wordCount << endl; cerr << "cs: " << lIt->commandStatus << endl; cerr << "\t" << lIt->commandStatus << ", WC: " << lIt->wordCount << endl; ++lIt; } ++it; } cerr << endl; } bool addMessage(unsigned key, const TestData& data) { TestStore::SharedMemoryMap::iterator it = mData.find(key); cerr << "Adding word count " << data.wordCount << endl; if(it != mData.end()) { it->second.push_back(data); } else { cerr << "Looking for " << mSegmentName.c_str() << endl; managed_shared_memory m(open_only, mSegmentName.c_str()); cerr << "found it" << endl; cerr << m.check_sanity() << " - " << m.get_free_memory() << "/" << m.get_size() << endl; cerr << mSegment->check_sanity() << " * " << mSegment->get_free_memory() << "/" << mSegment->get_size() << endl; ///!!!!!!!!!!!!!!!BROKE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! TestStore::SharedMemoryList sList(TestStore::ListAllocator( m.get_segment_manager())); //==========This Works (obviously only for current process)=========== // TestStore::SharedMemoryList sList(TestStore::ListAllocator( // mSegment->get_segment_manager())); sList.push_back(data); cerr << "pushed" << endl; cerr << sList.front().wordCount << endl; mData.insert(TestStore::SharedMemoryMap::value_type(key, sList)); cerr << "added list" << endl; } cerr << "====================Data post add===================" << endl; printData(); return true; } private: ///Segment housing this class. Only valid in the constructing process managed_shared_memory* mSegment; ///Name of the segment SharedMemoryString mSegmentName; SharedMemoryMap mData; }; int main() { std::string name = "MemHere"; int num_bytes = 645360; SharedMemoryDeleter deleter(name); managed_shared_memory shm(open_or_create, name.c_str(), num_bytes); TestStore store(shm, name); TestStore::TestData data; data.commandStatus = 10; data.wordCount = 14; store.addMessage(3, data); return 0; }

2 1

variant iterator, operators and enable_if
by MM 01 Mar '12

01 Mar '12

Hi, I have a variant iterator, ie an iterator that is associated with a variant, this variant is over a list of different iterators types. The variant object holds at any time 1 of the possible iterators. The variant iterator class attempts to implement the Iterator concept of c++1x. I am trying to declare and then define the various possible versions of operator== for instance. I have declared: bool operator==( const variant_iterator& lhs, const variant_iterator& rhs ); so far so good. I also want to allow == between the variant_iterator and any of the iterator types the variant type contains. So I am writing a: template <typename contained_iter_t> bool operator==(const variant_iterator& lhs, const contained_iter_t& rhs ); 1. Will the non templated version of operator== always take precedence over the templated one when in the same namespace/scope? 2. Do I need to disable the templated version when contained_iter_t happens to be variant_iterator ? 3. I want to allow comparison with both the straight and reverse versions of the iterator types in the variant. I have set a mpl container of iterators, made a variant off that container, then I use enable_if to check if the "contained_iterator" is part of the mpl container for Iterators, in which case I implement == with a == between the bound type and the iterator, otherwise between the bounded type and the base of the reverse iterator. all the enable_if are used as the return type for the operator== there are 4 versions: lhs==rhs and rhs==lhs for Iterator and reverse_iterator Comments and suggestions on the idea are appreciated, MM

1 0

XML Output
by Jake 01 Mar '12

01 Mar '12

Hey I'm pretty new to boost, but have successfully implemented it into a large program. I currently have the tests being run and having them output to a detailed xml file. I'm then parsing this file with python and am going to make a simple GUI interface for it. However, I just realized that the XML doesn't include the failure if there is one, and it instead prints it to command prompt. Is there a way to include it in the XML? All I want to see is the assertion that failed and what the result is. Is there another program I could have used this whole time that does this same thing? Thank you! p.s. I was trying to make it similar to nunit

1 0

zip_iterator.hpp / boost::tuple requires a using namespace std!
by mark pashley 01 Mar '12

01 Mar '12

Hi, I have been using zip iterators with a BOOST::Test to check that maps contain expected values. After moving some templated code to a header file I found that the code would not compie unless I place a *'using namespace std;' * declaration within one of functions. The compiler is gcc 4.6.2 and 4.4.2. The version of boost is 1.47 and 1.49 The minimum code snippet is as follows: * using namespace std; // without this the next line does not compile!* The error from gcc is: -- View this message in context: http://boost.2283326.n4.nabble.com/zip-iterator-hpp-boost-tuple-requires-a-… Sent from the Boost - Users mailing list archive at Nabble.com.

4 7

embedding
by Andreas Fabri 01 Mar '12

01 Mar '12

Hello I am wondering if there is ongoing work around the notion of embeddings of the Boost Graph Library. In the CGAL project which deals with geometric data structures we have written specializations of the graph_traits for the polyhedral surface, the halfedge datastructure, 2D triangulations, and arrangements. This allows to run BGL algorithms directly on CGAL data structures. http://www.cgal.org/Pkg/BGL. As these graphs are always embedded, that is as there is a circular order of edges we introduced a HalfedgeGraph concept http://www.cgal.org/Manual/latest/doc_html/cgal_manual/BGL_ref/Concept_Half… where one has global functions in order to walk along the border of a face, and go from an outgoing edge via the opposite incoming edge to a neighbor face. Would any of these ideas be interesting for the maintainers of the BGL. best regards, andreas -- Andreas Fabri, PhD Chief Officer, GeometryFactory Editor, The CGAL Project phone: +33.492.954.912 skype: andreas.fabri

3 2

Type deduction
by Robert Jones 01 Mar '12

01 Mar '12

Is there anything in Boost to help with the type deduction of simple arithmetic expressions? Essentially a C++03 version of template <typename T, typename U> struct deduce { typedef decltype( T / U ) type; }; (I know that wasn't valid code, it's just for exposition) Thx, - Rob.

1 1

[PREDEF] Review for the Boost.Predef library by Rene Riviera
by Joel Falcou 29 Feb '12

29 Feb '12

The review of BOOST.PREDEF by Rene Riviera is scheduled between Monday, February 20th to February 29th. ================ Contents & Scope ================ BOOST.PREDEF defines a set of compiler, architecture, operating system, and library version numbers from the information it can gather of C++ predefined macros or those defined in generally available headers. The idea for this library grew out of a proposal to extend the Boost Config library to provide more, and consistent, information than the feature definitions it supports. What follows is an edited version of that brief proposal. =============== How to get it ? =============== Sources and documentation can be retrieved from http://tinyurl.com/73n6a3k ================ Writing a Review ================ The reviews and all comments should be submitted to the developers list, and the email should have "[PREDEF] Review" at the beginning of the subject line to make sure it's not missed. Please explicitly state in your review whether the library should be accepted. The general review checklist: - What is your evaluation of the design? - What is your evaluation of the implementation? - What is your evaluation of the documentation? - What is your evaluation of the potential usefulness of the library? - Did you try to use the library? With what compiler? Did you have any problems? - How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? - Are you knowledgeable about the problem domain? And finally, every review should answer this question: - Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion.

2 1

PP: commas issues
by MM 29 Feb '12

29 Feb '12

Hi, I am trying to generate a list of instances of the same template with different pairs of args, to populate a mpl container, with PP so, mpl::vector< tmpl<A::x,A::y>, tmpl<B::x,B::y>, tmpl<C::x, C::y> > i'm having trouble with the commas. I successfully generate the pp sequence (tmpl<A::x,A::y>)(tmpl<B::x,B::y>) (tmpl<C::x, C::y>) but from this to get the enumeration, it's impossible using SEQ_ENUM, because the sequence contains commas MM

2 1

[multi_array] How to specify degenerate at runtime?
by Anton Daneyko 29 Feb '12

29 Feb '12

Greetings to Boosters, I have a 3D multi_array and I would like to make 2D slices using dimensions specified at runtime. I know the index of degenerate dimension and an index of slice, that I want to extract in that degenerate dimension. Currently the ugly workaround looks like that: if (0 == degenerate_dimension) { Slice slice = input_array[boost::indices[slice_index][range()][range()]]; } else if (1 == degenerate_dimension) { Slice slice = input_array[boost::indices[range()][slice_index][range()]]; } else if (2 == degenerate_dimension) { Slice slice = input_array[boost::indices[range()][range()][slice_index]]; } Is there a more beautiful way to construct index_gen object? Something like that: var slicer; for(int i = 0; i < 3; ++i) { if (degenerate_dimension == i) slicer = boost::indices[slice_index]; else slicer = boost::indices[range()]; } Slice slice = input_array[slicer]; It seems each subsequent call to boost::indices::operator[] returns a different type depending on the dimensionality, so there's no way to use a single variable, that can hold the temporary index_gen object.

1 1

iterator_facade with incomplete type as Value argument
by Philipp Moeller 29 Feb '12

29 Feb '12

I've tried writing an iterator with iterator_facade that returns itself as the result of dereference, but the Value template argument requires a complete type because it tries to make a difference between returning by value or reference if Value is_pod (as far as I understand). #include <boost/iterator/iterator_facade.hpp> class iter : public boost::iterator_facade< iter, iter, boost::forward_traversal_tag > { public: void fancy_non_iterator_member(); private: friend class boost::iterator_core_access; void increment() { } bool equal(iter const& other) const { return true; } iter& dereference() const { return const_cast<Derived&>(static_cast<const Derived&>(*this)); } }; Is this the intended behavior of iterator_facade? Is there some workaround? Would such an iterator actually be conforming? -- Philipp Moeller GeometryFactory

1 1

boost python & context manager/with statement
by Avi Bahra 29 Feb '12

29 Feb '12

Does boost python support context management using the with statement? In my case I need to manage __enter__/__exit__ on the c++ side. Could not find any examples for this in the documentation. Any help appreciated. Best regards, Ta, Avi

3 2

Using boost with PathScale v4.x under Linux
by Roberto Fichera 29 Feb '12

29 Feb '12

Hi there, I've compiled the last boost v1.49 against PathScale v4.x compiler under 64bit linux distribution, but when compiling certain library that uses the boost/numeric/interval/rounded_transc.hpp include file, I end up on getting some error regarding asinh(), acosh() and atanh() which were searched in the std namespace. Compiling the same library against g++ or MSVC goes pretty straight without problems. /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_exact<T, Rounding>::asinh_down(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:42: error: 'std::asinh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_exact<T, Rounding>::asinh_up(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:42: error: 'std::asinh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_exact<T, Rounding>::acosh_down(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:43: error: 'std::acosh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_exact<T, Rounding>::acosh_up(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:43: error: 'std::acosh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_exact<T, Rounding>::atanh_down(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:44: error: 'std::atanh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_exact<T, Rounding>::atanh_up(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:44: error: 'std::atanh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_std<T, Rounding>::asinh_down(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:77: error: 'std::asinh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_std<T, Rounding>::asinh_up(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:77: error: 'std::asinh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_std<T, Rounding>::acosh_down(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:78: error: 'std::acosh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_std<T, Rounding>::acosh_up(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:78: error: 'std::acosh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_std<T, Rounding>::atanh_down(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:79: error: 'std::atanh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_std<T, Rounding>::atanh_up(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:79: error: 'std::atanh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_opp<T, Rounding>::asinh_down(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:122: error: 'std::asinh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_opp<T, Rounding>::asinh_up(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:122: error: 'std::asinh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_opp<T, Rounding>::atanh_down(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:123: error: 'std::atanh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_opp<T, Rounding>::atanh_up(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:123: error: 'std::atanh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_opp<T, Rounding>::acosh_down(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:132: error: 'std::acosh' has not been declared /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp: In member function 'T boost::numeric::interval_lib::rounded_transc_opp<T, Rounding>::acosh_up(const T&)': /TempData/boost_1_49_0_pathscale/boost/numeric/interval/rounded_transc.hpp:132: error: 'std::acosh' has not been declared Thus, I had a look in the boost include file boost/numeric/interval/detail/bugs.hpp and look like that apply the patch below fixes the compilation error: --- numeric/interval/detail/bugs.hpp.orig 2012-02-29 10:44:06.876597264 +0100 +++ numeric/interval/detail/bugs.hpp 2012-02-29 10:18:42.831581398 +0100 @@ -25,7 +25,7 @@ #else # define BOOST_NUMERIC_INTERVAL_using_math(a) using std::a # if defined(BOOST_HAS_INV_HYPERBOLIC) -# if defined(__GLIBCPP__) || defined(__GLIBCXX__) +# if defined(__GLIBCPP__) || defined(__GLIBCXX__) || defined(__GLIBC__) # define BOOST_NUMERIC_INTERVAL_using_ahyp(a) using ::a # else # define BOOST_NUMERIC_INTERVAL_using_ahyp(a) using std::a does anyone can comment? Thanks in advance, Roberto Fichera.

1 0

[PREDEF] Review ends today
by Joel Falcou 29 Feb '12

29 Feb '12

The review of Boost.PRedef by Rene Rivera is ending today, February 29th. I recall to all people wanting to submit a formal review to do so. Regards

1 0

Metaprogramming Question
by John M. Dlugosz 28 Feb '12

28 Feb '12

I've not had much opportunity to do much template metaprogramming in my work, but I've kept up with my reading. So, might I get some advice on how to approach this problem? I'm thinking of an assert-like statement that follows the syntax of Boost.Format, thus avoiding the variadic argument list. MY_FANCY_ASSERT (cond, "format string") % arg % arg; works if the macro expands to an unnamed temporary, whose destructor does the interesting work if the first argument is false. my_assert_formatter_type (cond, "cond", __FILE__, __LINE__, "format string") This is easy to do, simply deriving from boost::formatter, I would think. But, I want to avoid doing any work except on failure. This means remembering the arguments including the following %arg stuff, and passing everything through to Boost.Format based on the condition. So I'm thinking that template metaprogramming can let me collect all the arguments (any number of them) into one object, efficiently at compile time. So, what approach should I use? Plain MPL and classic metaprogramming? Fusion? Phoenix? and any concrete suggestions on how to proceed, or pointers to similar works? Thanks, —John

6 16

boost::python handles boost::shared_ptr specially...
by Neal Becker 28 Feb '12

28 Feb '12

Will it just work if I use std::shared_ptr instead?

2 1

WIN64 vs _WIN64
by Roberto Fichera 28 Feb '12

28 Feb '12

Hi All, I got a compilation error while compiling a library under Win64 arch that includes the boost/numeric/interval/msvc_rounding_control.hpp c:\boost_1.48\include\boost/numeric/interval/detail/msvc_rounding_control.hpp(33) : error C4235: nonstandard extension used : '_asm' keyword not supported on this architecture c:\boost_1.48\include\boost/numeric/interval/detail/msvc_rounding_control.hpp(33) : error C2065: 'FLD' : undeclared identifier c:\boost_1.48\include\boost/numeric/interval/detail/msvc_rounding_control.hpp(34) : error C4235: nonstandard extension used : '_asm' keyword not supported on this architecture So I checked the code under boost/numeric/interval/detail/msvc_rounding_control.hpp and it seems that it does a preprocessor check against WIN64 instead of _WIN64 namespace boost { namespace numeric { namespace interval_lib { namespace detail { #if BOOST_MSVC < 1400 || *defined(WIN64)* extern "C" { double rint(double); } #else inline double rint(double x) { _asm FLD [x] ; _asm FRNDINT ; //_asm RET ; } #endif Is there any reason why do not check against _WIN64 instead of WIN64 since the boost does always check against _WIN64? _WIN64 is also already pre-defined as normal MSVC definition when targeting x86_64 archs. [roberto@roberto include]$ grep -R WIN64 * boost/serialization/force_include.hpp:#elif ! defined(_WIN32) && ! defined(_WIN64) boost/detail/win/synchronization.hpp: #if defined(_WIN64) boost/detail/win/basic_types.hpp:# ifdef _WIN64 boost/intrusive/detail/mpl.hpp:#if defined(_MSC_EXTENSIONS) && !defined(__BORLAND__) && !defined(_WIN64) boost/python/converter/builtin_converters.hpp:# if defined(_MSC_VER) && defined(_WIN64) && PY_VERSION_HEX < 0x03000000 boost/xpressive/xpressive_fwd.hpp:# if (defined(_WIN32) || defined(_WIN64) || defined(_WINCE)) \ boost/thread/win32/thread_primitives.hpp:# ifdef _WIN64 boost/regex/config.hpp:# if(defined(_WIN32) || defined(_WIN64) || defined(_WINCE)) \ boost/signals2/detail/lwm_win32_cs.hpp:#if defined(_WIN64) boost/config/compiler/intel.hpp:#if (!(defined(_WIN32) || defined(_WIN64)) && defined(__STDC_HOSTED__) && (__STDC_HOSTED__ && (BOOST_INTEL_CXX_VERSION <= 1200))) || defined(__GXX_EXPERIMENTAL_CPP0X__) boost/config/compiler/intel.hpp:#if defined(_WIN32) || defined(_WIN64) boost/smart_ptr/detail/lwm_win32_cs.hpp:#if defined(_WIN64) *boost/numeric/interval/detail/msvc_rounding_control.hpp:#if BOOST_MSVC < 1400 || defined(WIN64)*

2 2

C++ guru required!
by Robert Ramey 27 Feb '12

27 Feb '12

I've got a really dumb question. My question is illustrated by the following code snippit. template<class T, class U> T inline operator%(const T & lhs, const U & rhs) { if(0 == rhs) throw std::domain_error("Divide by zero"); if(boost::is_same<T, boost::uintmax_t>::value && boost::numeric::is_signed<U>::value ){ if(1 == rhs || -1 == rhs) // is this dropped? overflow("unsigned type can hold this result"); } return lhs % rhs; } I would like to think that the second if is always dropped from the compile for a particular pair of types since this can be evaluated at compile time. If I'm correct, I can replace some tedious template metaprogramming for some straightforward and transparent code inserted in a convenient code inserted in the most convenient place. Andre Alex... gave a talk at "Going Native" proposing a "static if" for this case. But I don't see the necessity for for this since I would assume that the compiler just optimises away the "dead" code. I've compiled the above and it seems to do what I want but still I wonder. Basically I see lots of applications of variations on this idea to get the benefits of tmp without the attendent pain. Am I missing anything here? Robert Ramey

8 20

[quickbook] how to use
by Nathan Ridge 27 Feb '12

27 Feb '12

Hello, I am trying to use QuickBook to write documentation for a project (that's not a Boost library), and I have a basic question about how to use it. So far I've followed the setup instructions on this page, built the quickbook executable by running bjam in BOOST_ROOT\tools\quickbook, written a .qbk file in QuickBook format, and ran the quickbook executable on my .qbk file to produce an XML file which looks like BoostBook XML. Now how do I go about generating HTML or PDF from that BoostBook XML file? Thanks, Nate

2 1

[build] Is there any interest in a configure auto generator for boost-build?
by Tianjiao Yin 27 Feb '12

27 Feb '12

Hello all: Boost build configure (site-config.jam) is not easy to write for me, especially when I install some new compilers or tools. So I wrote a script to generate the configure in "/etc/site-config.jam" automatically for myself. You can get the whole source code here: http://ideone.com/kkI2G When I run this script by using argument "--setup", it will generate a new configure in "/etc/site-config.jam" like this: http://ideone.com/4yWyI I am using archlinux, not tested in any other platform. For archers, this script is part of boost-build-nightly in AUR, it works for me. BTW, boost-build 2.0_m12 is in the archlinux official repository. But this version is too outdated to build many examples in the boost 1.48.0. When m13 release? Regards, Tianjiao

1 0

[Container] comment on slist/forward_list documentation
by Brian Wood 26 Feb '12

26 Feb '12

Iiuc, Boost.Container implements slist but not forward_list. I'd like to suggest tweaking the following sentence. *"Boost.Container* updates the classic slist container with C++11 features like move semantics and placement insertion and implements it a bit differently for the standard C++11 forward_list." ^^ It might be better to say "and implements it a bit differently than the standard C++ forward_list." ? I wondered if you had both an slist and a forward_list implementation for a while and did some other checking to figure out what was in the library. http://www.boost.org/doc/libs/1_49_0/doc/html/container/non_standard_contai… Shalom Brian Wood Ebenezer Enterprises http://webEbenezer.net

2 1

[Iterators] How to implement proxy iterators?
by Oswin Krause 26 Feb '12

26 Feb '12

Hi Everybody, I'm trying to implement a proxy_iterator for ublas::matrix which should behave as an iterator over the matrix rows. My "obvious" solution does not seem to work: typedef boost::numeric::ublas::matrix<double> Matrix; typedef boost::numeric::ublas::matrix_row<Matrix> MatrixRow; typedef boost::numeric::ublas::vector<double> Vector; struct MatrixIterator: public boost::iterator_facade< MatrixIterator, Vector,//the semantic value type is a Vector boost::random_access_traversal_tag, MatrixRow//reference is a row of a matrix >{ //snip constructors private: friend class boost::iterator_core_access; //snip iterating stuff //fun part MatrixRow dereference() const { return row(*m_matrix,m_element); } std::size_t m_element; Matrix* m_matrix; }; which reuslts in an error that MatrixRow can't be implicitely casted to Vector. Which is correct. At the moment I'm using a 90% hacked workaround which changes the ValueType of the Iterator to MatrixRow. This seems to work as long as I don't use algorithms which rely on the actual value_type of the iterator (for example iter_swap as implemented in the gnu libstdc++ will fail miserably even though a correct swap is implemented for the MatrixRow...different story ) Since I need std::random_shuffle I am out of luck. I tried to find the actual requirements of iterator_facade with respect to ValueType/ReferenceType in the documentation, but was not able to find them. Does someone now a solution to this problem which works and results in an iterator which can safely be used in random_shuffle? Or can point me to the correct requirements? Greetings from Germany, Oswin Krause

2 5

Linking problem
by Johan Råde 26 Feb '12

26 Feb '12

I built Boost with the command b2 toolset=msvc-10.0 address-model=32 link=static runtime-link=shared threading=multi stage I'm linking statically with Boost and dynamically with the CRT (compiler option /MD). I get the error message LINK : fatal error LNK1104: cannot open file 'libboost_iostreams-vc100-mt-1_49.lib' What might the problem be?

3 4

any progress on the logger?
by Victor Whiskey Yankee 25 Feb '12

25 Feb '12

Hello, Any progress on getting the logger into an official release? Thanks, Vic

2 1

[phoenix] Extending actors
by paul Fultz 25 Feb '12

25 Feb '12

Hi all, I am wanting to extend actors to access a member variable from the class. In the examples they show extending an acotr by using a lazy function to call the function. I was thinking I could use a lazy function to access the member, something like this: template <typename Expr> struct point_actor : actor<Expr> { typedef actor<Expr> base_type; typedef point_actor<Expr> that_type; point_actor( base_type const& base ) : base_type( base ) {} typename expression::function<x_impl, that_type>::type x; typename expression::function<y_impl, that_type>::type y; }; Where x_impl and y_impl are lazy functions that access the x and y variable. Would this work as member variables, rather than member functions? Also, why wouldnt the second parameter to expression::function take just actor instead of just point_actor<Expr>? Does that make sense? The reason I ask is I would like to control the actor that is returned and do something like this(using the above actor): template <typename Expr> struct rect_actor : actor<Expr> { typedef actor<Expr> base_type; typedef rect_actor<Expr> that_type; rect_actor( base_type const& base ) : base_type( base ) {} typename expression::function<top_impl, point_actor >::type top; typename expression::function<bottom_impl, point_actor >::type bottom; }; expression::terminal<phoenix::argument<1>, rect_actor > arg1; (cout << arg1.top.x)(my_rect()); Does that make sense? I can't seem to find any reference on the predefined expressions, and I also can't find the header file for expression::function. Finally, the is_actor trait doesn't seem work for extended actors.Is there a workaround for that? Thanks, Paul

2 4

Boost 1.49.0 release notice
by Beman Dawes 24 Feb '12

24 Feb '12

Release 1.49.0 of the Boost C++ Libraries is now available. These open-source libraries work well with the C++ Standard Library, and are usable across a broad spectrum of applications. The Boost license encourages both commercial and non-commercial use. This release contains one new library (Heap) and numerous enhancements and bug fixes for existing libraries. For details, including download links, see http://www.boost.org/users/news/version_1_49_0 You can also download directly from SourceForge: http://sourceforge.net/projects/boost/files/boost/1.49.0/ To install this release on your system, see http://www.boost.org/doc/libs/release/more/getting_started/index.html Thanks, --The Boost release team Beman Dawes Daniel James Eric Niebler Rene Rivera Vladimir Prus

3 2

Detecting file encoding
by norulez＠me.com 24 Feb '12

24 Feb '12

Hi, is there a way in boost to detect the encoding of a file? Thanks in advance Best Regards NoRulez

1 0

iterator_adaptor: making dereference of adapted tree node* return node value
by Rob Desbois 24 Feb '12

24 Feb '12

I have the following iterator_adaptor type: template< class NODE > struct node_iterator: public boost::iterator_adaptor< node_iterator<NODE>, // Derived NODE*, // Base typename NODE::value_type // Value > { typename NODE::value_type dereference() const { return this->base_reference()->data(); } }; // and later: typedef detail::node_iterator<node_type> iterator; typedef detail::node_iterator<const node_type> const_iterator; This throws up the issue that in const_iterator, Value is not const, producing the following error: /usr/include/boost/iterator/iterator_facade.hpp:517:32: error: invalid initialization of non-const reference of type ‘container::detail::node_iterator<const container::detail::node<long unsigned int> >::reference {aka long unsigned int&}’ from an rvalue of type ‘container::detail::node<long unsigned int>::value_type {aka long unsigned int}’ I could do some type traits magic with is_same, is_const and add_const to add the constness to Value if present on NODE, but is this the right way to do it? I've also thought about indirect_iterator - but adding operator*() to the node type seems not quite right. Perhaps transform_iterator...or is there some different method that might be more suitable? TIA, --rob -- Rob Desbois Blog: http://theotherbranch.wordpress.com/ "I disapprove of what you say, but I’ll defend to the death your right to say it", Voltaire

3 5

[posix_time] from_time_t bug
by Matthew Jenks 24 Feb '12

24 Feb '12

Hello, I am running into a problem with boost::posix_time::from_time_t() on a PC with, windows xp, visual studio 2010. When I input a number larger than the decimal equivalent of 0x7FFFFFFF (maximum posssible int32) into the function it returns a ptime with a date of 1902 or something close to. I assume the UNIX equivalent of time_t is a int32 and that is why I am having this problem, but I know a time_t is the equivalent to __int64 in windows xp. Is there is a MACRO define I am missing or is this a bug that needs to be fixed with this function so that it can accept the windows equivalent of time_t? Shouldn't this function accept and convert larger intigers thank int32 to a ptime or do I have to write my own? Thanks, Matt

2 1

Getting Mac address once ip address
by radha bhavani 24 Feb '12

24 Feb '12

Hi, Is there any api available in boost library to get mac addess of the device if ip address is know. Regards, Bhavani

2 1

[MultiIndex] how to rebuild index
by Igor R 24 Feb '12

24 Feb '12

Hello, What's the most simple way to rebuild an index? If elements change without notifying the container, would iterating from begin to end and calling modify() with no-op - do the job? (I remember there already was such a question, but can't find it.) Thanks.

3 3

[asio] Issue with resolver query for 64-bit browsers (IE)
by Jacques, Keiko 23 Feb '12

23 Feb '12

I am writing a browser plugin which needs to get the size of a file using the HTTP HEAD request. In order to send the request I am using the boost socket and the boost::asio::ip::tcp::resolver::query to get the ip address and service port. I am basically using code from the asio sync_client sample provided with Boost 1.48.0. using boost::asio::ip::tcp; boost::asio::io_service io_service; tcp::resolver resolver(io_service); tcp::resolver::query query(hostname, "http"); tcp::resolver::iterator endpoint_iterator = resolver.resolve(query); tcp::resolver::iterator end; This works fine when I run this on a Windows platform (Windows 7) using 32-bit browsers such as Firefox, Chrome, and IE. This also works fine when I run this as a desktop application through a test driver on a Windows (Vista , Windows7)64-bit platform. However, when I run this as a browser plugin on the Windows Vista 64-bit platform using IE (64-bit) it seems to crash on the line: tcp::resolver resolver(io_service); I'm not sure if this is a Boost issue or an IE issue, so I was wondering if anyone knows of any incompatibility issues and/or limitations with Boost and IE (64-bit) which could cause this to happen. Thanks Keiko ________________________________ This e-mail and any attachments may contain confidential material for the sole use of the intended recipient. If you are not the intended recipient, please be aware that any disclosure, copying, distribution or use of this e-mail or any attachment is prohibited. If you have received this e-mail in error, please contact the sender and delete all copies. Thank you for your cooperation.

1 0

REGEX Don't understand the matching behavior: regex_search vs. regex_match
by Andy Falanga (afalanga) 23 Feb '12

23 Feb '12

Hi, I understand enough that regex_match() searches for matches based on the entire input string and apparently regex_search() allows for matches of the expression within the input string (i.e. the expression need not match the entire input string). However, I'm not understanding why the following happened: const char* pInput("Loc info: Channel 2, Target 0, Lun 0"); boost::cmatch found; boost::regex expression(".*Channel ([[:digit:]]{1,3})); // looking for the channel number only if(boost::regex_match(pInput, found, expression, boost::regex_constants::match_partial)) { std::cout << "Matched: " << std::atoi(found[1].first) << std::endl; } When using the above, with regex_match(), the match succeeded but the output string was: "Matched: 0". What?!? If the expression was matched, why did the capture group 1 contain 0? How should the expression have been made? That's what I don't understand. I've found that what I want is accomplished with altering the above thusly: const char* pInput("Loc info: Channel 2, Target 0, Lun 0"); boost::cmatch found; boost::regex expression("Channel ([[:digit:]]{1,3})); // looking for the channel number only if(boost::regex_search(pInput, found, expression)) { std::cout << "Matched: " << std::atoi(found[1].first) << std::endl; } This gives me: "Matched: 2." Which is what I'm looking for. I'd like to understand why regex_match() wasn't giving me what I wanted. Thanks everyone, Andy

2 2

problem with interprocess queue in boost 1.39
by orialtman 23 Feb '12

23 Feb '12

Hi All! I am using boost 1.39 on windows. i have implemented a simple client server application and ran the client and server simultaneously. The client pushes request using 'send' api with no timeout. it then sleeps for 3 seconds and sends another request and so on. the server pops messages from the queue with a timeout of 1 second. it then sleeps for 1 seconds and pops again and so on. this was created to simulate a problem i have in a more complicated server which actually performs work on received items. After some random time has passed i see that the client is locked and unable to push messages. it is locked in the 'notify' function which takes place at the end of do_send method of message_queue.hpp. while it is locked there i also see that the number of waiters on the condition is 1. when i pause the server application i see that it is not inside the do_receive method and therefore there is no appearent reason for the lock to be unavailable and for the number of waiters to be 1. has anyone come across something similar? is this a known issue for 1.39 or am i using the queue in a bad form? -- View this message in context: http://boost.2283326.n4.nabble.com/problem-with-interprocess-queue-in-boost… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

[variant] 'which' out of range assertion
by Igor R 23 Feb '12

23 Feb '12

Hello, It appears that since 1.47 Boost.Variant has a bug that can be reproduced as follows (MSVC10, Debug mode): #include <boost/variant.hpp> #include <boost/mpl/vector/vector30.hpp> struct struct1{}; struct struct2{}; struct struct3{}; struct struct4{}; struct struct5{}; struct struct6{}; struct struct7{}; struct struct8{}; struct struct9{}; struct struct10{}; struct struct11{}; struct struct12{}; struct struct13{}; struct struct14{}; struct struct15{}; struct struct16{}; struct struct17{}; struct struct18{}; struct struct19{}; struct struct20{}; struct struct21{}; typedef boost::mpl::vector21< struct1, struct2, struct3, struct4, struct5, struct6, struct7, struct8, struct9, struct10, struct11, struct12, struct13, struct14, struct15, struct16, struct17, struct18, struct19, struct20, struct21 >::type vec_type; typedef boost::make_variant_over<vec_type>::type var_type; int main() { var_type v; v = struct21(); } The last line generates assertion in variant_impl.hpp, line 264, visitation_impl() function: "Boost.Variant internal error: 'which' out of range." According to the release notes, variant wasn't changed in 1.47, but I recalled teh following discussion: http://boost.2283326.n4.nabble.com/large-variant-performance-compared-50-el… It seems that the above issue is somehow related to this change. Igor'.

3 12

numerical quadrature
by Dr. Bruce Elenbogen 23 Feb '12

23 Feb '12

There seems to be documentation about boost numerical quadrature, but when I download boost no such libraries exist. Where can I find the quadrature libraries? thank you Bruce

2 1

[range] unique
by Bill Buklis 23 Feb '12

23 Feb '12

This may simply be my lack of understanding of the range library as I'm still just working my way through the algorithms, but is boost::unique returning the correct result range? Given that std::unique returns an iterator to the first non-unique value you can do something like: vec.erase( std::unique(vec.begin(), vec.end(), vec.end() ); However, boost::unique returns the range of the "unique" values. I would expect instead that it would return the range of non-unique values so that it matched the standard algorithm version, which effectively returns the range of non-unique values. Correspondingly trying: boost::erase( vec, boost::unique(vec) ); eliminates the complete opposite of what the standard version does. I can get around this by calling: vec.erase( boost::unique(vec).end(), vec.end() ); but this seems rather counter-intuitive to me. Is this correct? Is this by intent? What is the benefit of having it this way? The documentation doesn't mention anything at all about the return range in the description. Since I'm still just beginning to use the range library, I don't know all the tricks and benefits yet, so I ask. -- Bill

2 2

Boost.Units: Issue with user-defined and unitless quantities
by Pieter 22 Feb '12

22 Feb '12

LS, This is a repost of an earlier question that unfortunately remained unanswered - I still hope sincerely someone out there can help me out as I feel really stuck here. I have some problems working with user defined quantities/units in combination with unitless quantities (such as the results of a sin() or cos() operations).Taking the example of the 'nautical mile', which is presented in the documentation: ---START CODE --- namespace nautical { struct length_base_unit : boost::units::base_unit<length_base_unit, length_dimension, 1> { static std::string name() { return "nautical mile"; } static std::string symbol() { return "nmi"; } }; typedef boost::units::make_system<length_base_unit>::type system; typedef unit<length_dimension,system> length; static const length mile,miles; } BOOST_UNITS_DEFINE_CONVERSION_FACTOR(nautical::length_base_unit, boost::units::si::meter_base_unit, double, 1.852e3); ---END CODE --- The following does not compile: ---START CODE --- typedef quantity<boost::units::si::plane_angle> TAngleInRad; typedef boost::units::quantity<nautical::length> TNauticalDistanceInNMI; TNauticalDistanceInNMI NauticalDistanceInNMI; TNauticalDistanceInNMI SumNauticalDistanceInNMI = NauticalDistanceInNMI + NauticalDistanceInNMI; // OK TNauticalDistanceInNMI ScaledSumNauticalDistanceInNMI = NauticalDistanceInNMI + NauticalDistanceInNMI*sin(AngleInRad); // Last line does not compile due to lack of a suitable operator+ ---END CODE --- It does work correctly when using the 'nautical mile' as it has been defined in the library itself in "nautical_mile.hpp" (as a scaled base unit related to the si::meter): ---START CODE --- namespace metric { typedef scaled_base_unit<boost::units::si::meter_base_unit, scale<1852, static_rational<1> > > nautical_mile_base_unit; } // definition of the nautical mile from "nautical_mile.hpp" typedef boost::units::metric::nautical_mile_base_unit::unit_type nautical_mile_unit; typedef quantity<nautical_mile_unit> TNauticalDistanceInNMI; ---END CODE --- However, I don't think I can specify my user-defined units/quantities in this manner as they use a scale factor represented by an arbitrary floating point value. My perception is that the example of the documentation does not work due to the mixing of quantities from the si system (the sin() returns a dimensionless quantity in that system) with user-defined quantities in another ('nautical') system, while the 'nautical mile' from 'nautical_mile.hpp' is a scaled version of the si::meter and thus defined within the realms of the si::system - but please correct me if I am wrong here. My problem can thus be summarized as follows: - the solution from the documentation does not compile - the solution from 'nautical_mile.hpp' uses a scaled base unit which is limited to scaling factors of the form scale<Base,Exponent> and my question is therefore: how can I define my user-defined units/quantities in such a way that they allow the required operations while being related to base units by an arbitrary scale factor? Help would be highly appreciated, Pieter ------------------- Nautical mile version #1 (from the included nautical_mile.hpp): namespace metric { typedef scaled_base_unit<boost::units::si::meter_base_unit, scale<1852, static_rational<1> > > nautical_mile_base_unit; } template<> struct base_unit_info<metric::nautical_mile_base_unit> { static const char* name() { return("nautical mile"); } static const char* symbol() { return("nmi"); } }; typedef quantity<boost::units::si::plane_angle> TAngleInRad; typedef quantity<boost::units::si::length> TDistanceInM; typedef boost::units::metric::nautical_mile_base_unit::unit_type nautical_mile_unit; typedef quantity<nautical_mile_unit> TDistanceInNMI; typedef boost::units::quantity<nautical::length> TNauticalDistanceInNMI; # this is OK: TAngleInRad Angle(0.5*radians); TDistanceInNMI DistanceInNMI; TDistanceInNMI SumDistanceInNMI = DistanceInNMI + DistanceInNMI; TDistanceInNMI ScaledSumDistanceInNMI = DistanceInNMI + DistanceInNMI*sin(AngleInRad); TNauticalDistanceInNMI NauticalDistanceInNMI; TNauticalDistanceInNMI SumNauticalDistanceInNMI = NauticalDistanceInNMI + NauticalDistanceInNMI; TNauticalDistanceInNMI ScaledSum NauticalDistanceInNMI = NauticalDistanceInNMI + NauticalDistanceInNMI*sin(AngleInRad); // DOES NOT COMPILE for lack of a suitable operator+

1 0

[Serialization] base64 encoding/decoding an archive as it's written/read
by Sean Farrow 22 Feb '12

22 Feb '12

Hi: Is there any way of base64 encoding/decoding an archive as it is wread/written? I have found some code that encodes, but wondered whether there was already any ioStreams written. Cheers Sean.

2 2

Acknowledgement messages
by norulez＠me.com 22 Feb '12

22 Feb '12

Hi, can anybody explain me on how to stop the "Boost-users post acknowledgement" messages after I submit a message? Thanks in advance Best Regards NoRulez

2 2

Re: [Boost-users] undefined reference to '__sync_add_and_fetch_4'whencross-compiling boost::asio fors mips
by Jayne 22 Feb '12

22 Feb '12

Hello Andreas, Thanks for the help. I have eventually managed! In short I... - defined BOOST_ASIO_DISABLE_THREADS both while building Boost, and in the application which used it - implemented the atomic primitives using code from the gcc headers All working now! thanks, Jayne. On Fri 17/02/12 12:37 , "Andreas Wehrmann" a.wehrmann(a)centersystems.com sent: Alright, I looked into how I did when I faced the problem (my previous reply was a fast shot). I put the following #defines in the user config header (boost/config/user.hpp): #define BOOST_ASIO_DISABLE_FENCED_BLOCK #define BOOST_SP_USE_SPINLOCK This did the trick for me. From what I recall, the problem lies with shared_ptr since the implementation tries to use gcc builtins for the locking mechanism it needs for refcounting but which are not implemented on every platform (in my case it was Coldfire/m68k). Regards -- Dipl.-Ing. (FH) Andreas Wehrmann Software Development -------------------------------------------------------------- Center Communication Systems GmbH A-1210 Wien, Ignaz-Köck-Straße 19 Sitz in Wien FN 796 88p, Firmenbuchgericht Wien http://www.centersystems.com [1]">www.centersystems.com Tel.: +43 (0) 190 199 - 3616 Mobile: +43 (0) 664 884 75916 Fax: +43 (0) 190 199 - 2110 E-Mail: a.wehrmann(a)centersystems.com Links: ------ [1] http://www.centersystems.com

1 0

Re: [Boost-users] mpi/serialization: broadcasting derived class through base pointer
by MM 22 Feb '12

22 Feb '12

> -----Original Message----- > From: Matthias Troyer [mailto:troyer@phys.ethz.ch] > Sent: 16 December 2010 15:20 > To: > Subject: Re: [Boost-users] mpi/serialization: broadcast function and > the value argument > > > On Dec 16, 2010, at 10:54 PM, Hicham Mouline wrote: > > > 1.44 > > As I wrote, I am able to debug deep into boost mpi and archive. > > Please let me know if I should send any more stacks or other data, > > > > Please try with 1.45. Pointer serialization in Boost.MPI has been > broken in 1.44 due to changes in Boost.Serialization. > > Matthias Hello Matthias, Robert Ramey, I am revisiting the topic of mpi broadcast-receiving a polymorphic object through a base class null pointer: void recv_histodata(boost::mpi::communicator& world) { historical_data_base* hd = nullptr; boost::mpi::broadcast(world, hd, master_process); } historical_data_base has 3 derived classes. I get the unregistered class exception from the serialization library, and so I am trying to register the derived type as shown in the serialization doc at /libs/serialization/doc/index.html : reference ar.template register_type<derived_one>(); but where do I put that? Regards, MM

6 19

return std::vector<> as boost::python::list
by Andy Falanga (afalanga) 21 Feb '12

21 Feb '12

Hi everyone, I'd originally worked out this issue by following the guidelines at the python wiki for exposing C++ containers into python. Basically, I made my vector act like a python list. This, however, created a problem for our teams build environment, specifically, that we didn't have python_d.lib to link with. This irritation cannot be tolerated in our environment so, I'm tasked with moving that vector to a boost::python::list object. However, all of my searches haven't returned much in terms of how to use this list object. The vector is of a simple structure that doesn't have anything but primitive types. Because of this, returning the list by value isn't a problem. Could I simply make a wrapper around the function that returns the vector with function that returns the list? For example: std::vector<myStruct>& GetVector() { // important stuff return vector; } boost::python::list GetPythonList(std::vector<myStruct>& structure) { boost::python::list boostPyList; for(int i(0); i < structure.size(); i++) { // copy each element into the python list } return boostPyList; } Would this work? Is it that simple? Thanks, Andy

1 0

[Multi-Index] Design Rationale behind erase in ordered_index container
by Ovanes Markarian 21 Feb '12

21 Feb '12

Hello Joaquín, the doc states in erase that an iterator or end-iterator is returned when erasing an element. What was the rationale behind returning the iterator? Where other members return the number of elements being removed. My point is that end-iterator is also returned when erasing an element where iterator points one before the end iterator. Now to be sure that the specified element was really removed my call must either use the key and search for that element again or compare the size before and after the erase call. Many thanks, Ovanes http://www.boost.org/doc/libs/1_47_0/libs/multi_index/doc/reference/ord_ind… iterator erase(iterator position); *Requires:* position is a valid dereferenceable iterator of the index. *Effects:* Deletes the element pointed to by position. *Returns:* An iterator pointing to the element immediately following the one that was deleted, or end() if no such element exists. *Complexity:* O(D(n)). *Exception safety:* nothrow.

5 10

Using a part of a Jamfile.v2
by Daryle Walker 21 Feb '12

21 Feb '12

I was thinking about tweaking a library in Boost. Its BOOST_ROOT/libs/math/test/ directory is shared with some other libraries, so there's a lot of test files and the shared Jamfile.v2 used to make the tests is huge. Is there a way to restrict which targets are built from the command line? Right now, it takes MANY hours to go through every test. (When I did something similar last week with another library, I just commented out all the other libraries sharing the file. Do I have to resort to that all the time?) Daryle W.

2 1

[hash] Reliability of hash_value() for std::string
by Szymon Gatner 21 Feb '12

21 Feb '12

Hi, I am coding a simple serialization/factory lib and want to use class hash code based on std::string representing class name as a factory identifier. My question is: how portable / reliable is hash value produced by std::string hash_value() overload? Will it be the same across platforms? Across boost versions? Or maybe actual algorithm is dictated by standard? Or should I just go with explicit algo like crc32? btw. I was just very hardly bitten by the fact that hash_value() for const char* != hash_value() for std::string, (it is just being treated as regular pointer). In other words hash_value("Class") != hash_value(std::string("Class")) which gave me few more gray hair. Is that desirable? Cheers, Szymon Gatner

3 4

Seeking in a serialized file
by gnu indian 21 Feb '12

21 Feb '12

hi, I am fairly new to boost and using it for serialization. Though I went through the archives, couldn't get a clear answer to the following: How do I fseek in a file and load from an offset. I don't want to read the whole data in the file; which works ( as given in some tutorial); but normal fseekg and then loading apparently doesn't work. Here is the sample code: const char* fileName = "xyz.txt"; // Create some objects const Obj o1(1, false); const Obj o2; const Obj o3(2, true); const Obj* const p1 = &o1; int p = 0; int q = 0; // Save data { // Create an output archive std::fstream ofs(fileName); boost::archive::binary_oarchive ar(ofs,boost::archive::no_header); // Write data ar & o1 & o2 & o3 & p1; p = ofs.tellp(); ar & o1 & o2 & o3 & p1; } // Restore data Obj restored_o1; Obj restored_o2; Obj restored_o3; Obj* restored_p1; { // Create and input archive std::ifstream ifs(fileName); boost::archive::binary_iarchive ar(ifs, boost::archive::no_header ifs.seekg(p); ar & restored_o1 & restored_o2 & restored_o3 & restored_p1; } Mridul

3 2

Quick (hopefully simple) Spirit::Qi question
by david.weber＠l-3com.com 21 Feb '12

21 Feb '12

I have a grammar that fully works. I'm in the process of now adding semantic actions to actually *do* something, and I'm hitting a snag. (BTW, I've used Boost::Spirit::Classic, but this is my first time w/ Qi) Grammar: template <typename Iterator> struct FortranLineGrammar : grammar<Iterator, space_type> { FortranLineGrammar() : FortranLineGrammar::base_type(start) { lvalue %= !hex_int >> lexeme[alpha >> *(alnum | '_')] >> *dim; BOOST_SPIRIT_DEBUG_NODE(lvalue); assignment = lvalue[ppp_print] >> "=" >> command; BOOST_SPIRIT_DEBUG_NODE(assignment); ... } typedef rule<Iterator, std::string(), space_type> string_rule_t; string_rule_t lvalue; }; Semantic action: extern void ppp_print(std::string& b); and later void ppp_print(std::string& b) { std::cout << b << std::endl; } So, what I'm going for, is when an lvalue is encountered, to call ppp_print with whatever matched that value. Unfortunately, I'm only getting the first character?!? Here is the debug output, not the right match, but I'm still tweaking the grammar. Looking at the actions only... PRINT *, 'AHHHH! ' <start> <lvalue> <try>PRINT *, 'AHHHH! '</try> <dim> <try> *, 'AHHHH! '</try> <fail/> </dim> <success> *, 'AHHHH! '</success> <attributes>[[P]]</attributes> </lvalue> So what gives?

2 1

How to make boost asio fork safe
by Ranadheer 20 Feb '12

20 Feb '12

I have built a C++ library using boost ASIO. The library needs to be both thread-safe and fork-safe. It has service scheduler thread, which calls "_io_service.run())". To support fork-safety, I've registered pre_fork, post_fork_parent and post_fork_child handlers. The pre_fork() handler, calls "_io_service.notify_fork(boost::io_service:fork_prepare();", post_fork_parent handler calls "_io_service.notify_fork(boost::asio::io_service::fork_parent);" and post_fork_child calls "_io_service.notify_fork(boost::asio::io_service::fork_child);". The problem I'm facing in, when the fork() happens, the service scheduler thread might be in middle of some operation and might have acquired lock on data members of io_service object. So, the child process seems them in the same state and in the post_fork_child() when we call "_io_service.notify_fork(boost::asio::io_service::fork_child);" it tries to acquire the lock on the same object and hence get blocked indefinitely (as there is no thread in child to release the lock). The stack trace I see in the child process, which is blocked, is - fffffd7ffed07577 lwp_park (0, 0, 0) fffffd7ffecffc18 mutex_lock_internal () + 378 fffffd7ffecfffb2 mutex_lock_impl () + 112 fffffd7ffed0007b mutex_lock () + b fffffd7fff26419d __1cFboostEasioGdetailLscoped_lock4n0CLposix_mutex__2t5B6Mrn0D__v_ () + 1d fffffd7fff2866a2 __1cFboostEasioGdetailQdev_poll_reactorMfork_service6Mn0BKio_serviceKfork_event__v_ () + 32 fffffd7fff278527 __1cFboostEasioGdetailQservice_registryLnotify_fork6Mn0BKio_serviceKfork_event__v_ () + 107 fffffd7fff27531c __1cDdesGtunnelQServiceSchedulerPpost_fork_child6M_v_ () + 1c fffffd7fff29de24 post_fork_child () + 84 fffffd7ffec92188 _postfork_child_handler () + 38 fffffd7ffecf917d fork () + 12d fffffd7ffec172d5 fork () + 45 fffffd7ffef94309 fork () + 9 000000000043299d main () + 67d 0000000000424b2c ???????? () Apparently the "dev_poll_reactor" is locked (because it seems to be dispatching some pending events) in the service scheduler thread when the fork has happened which is causing the problem. I think to solve the problem, I need to ensure that service scheduler thread is not in the middle of any processing when the fork happens and one way to guarantee that would be to call "io_service.stop()" in pre_fork() handler but that doesn't sound like a good solution. Could you please let me know what is the right approach to make the library fork safe? The code snippets looks something like this. /** * Combines Boost.ASIO with a thread for scheduling. */ class ServiceScheduler : private boost::noncopyable { public : /// The actual thread used to perform work. boost::shared_ptr<boost::thread> _service_thread; /// Service used to manage async I/O events boost::asio::io_service _io_service; /// Work object to block the ioservice thread. std::auto_ptr<boost::asio::io_service::work> _work; ... }; /** * CTOR */ ServiceScheduler::ServiceScheduler() : _logger("ServiceScheduler"), _io_service(), _work(std::auto_ptr<boost::asio::io_service::work>( new boost::asio::io_service::work(_io_service))), _is_running(false) { } /** * Starts a thread to run async I/O service to process the scheduled work. */ void ServiceScheduler::start() { ScopedLock scheduler_lock(_mutex); if (!_is_running) { _is_running = true; _service_thread = boost::shared_ptr<boost::thread>( new boost::thread(boost::bind( &ServiceScheduler::processServiceWork, this))); } } /** * Processes work passed to the ASIO service and handles uncaught * exceptions */ void ServiceScheduler::processServiceWork() { try { std::cout<<"Running io_service"<<std::endl; _io_service.run(); } catch (std::exception& e) { TUNNEL_LOGGER_ERROR(_logger, "Exception while running ioservice" << e.what()); } catch (...) { TUNNEL_LOGGER_ERROR(_logger, "Uncaught exception while running " << "ioservice"); } } /** * Pre-fork handler */ void ServiceScheduler::pre_fork() { _io_service.notify_fork(boost::asio::io_service::fork_prepare); } /** * Post-fork parent handler */ void ServiceScheduler::post_fork_parent() { _io_service.notify_fork(boost::asio::io_service::fork_parent); } /** * Post-fork child handler */ void ServiceScheduler::post_fork_child() { _io_service.notify_fork(boost::asio::io_service::fork_child); } I'm using boost 1.47 and running the application on Solaris i386. The library and application are built using studio-12.0. Thanks Ranadheer -- View this message in context: http://boost.2283326.n4.nabble.com/How-to-make-boost-asio-fork-safe-tp44040… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

Boost.Format for variadic numbers of arguments
by Philipp Moeller 20 Feb '12

20 Feb '12

I currently have a lot of code that formats list into something readable. Is it possible to do something like: boost::format fmt("List [ %V,%]"); std::vector<std::string> c = {"foo", "bar" }; std::for_each(begin(c), end(c), [&fmt](const std::string& x) { fmt % x; }); Where V would indicate a variable list and the character constant immediately after it would be the separator. (I'm not sure about V as a parameter, but someone more familiar with the library might have an answer to that.) Alternatively, suggestions for a flexible container pretty printer would be welcome as well. Cheers, Philipp Moeller

1 0

Edmonds karp max flow compile error
by coolhead.pranay＠gmail.com 19 Feb '12

19 Feb '12

Hi, I want to use BGL to compute the maximum flow in a network. Following is the definition of Graph that I am using typedef adjacency_list_traits < listS, listS, bidirectionalS > Traits; typedef adjacency_list < listS, listS, bidirectionalS, property < vertex_name_t, int >, property < edge_capacity_t, long, property < edge_residual_capacity_t, long, property < edge_reverse_t, Traits::edge_descriptor > > > > Graph; . Before computing the max flow, I have the following optional parameters setup property_map < Graph, edge_capacity_t >::type capacity = get(edge_capacity, this->g); property_map < Graph, edge_reverse_t >::type rev = get(edge_reverse, this->g); property_map < Graph, edge_residual_capacity_t >::type residual_capacity = get(edge_residual_capacity, this->g); property_map < Graph, vertex_name_t >::type vname = get(vertex_name,this->g); std::vector<default_color_type> color(num_vertices(this->g)); std::vector<Traits::edge_descriptor> pred(num_vertices(this->g)); The call to the algorithm is.. int flow = edmonds_karp_max_flow(g, s, t, capacity, residual_capacity, rev, &color[0], &pred[0]); When I try to compile the program it fails with the following error message. Can someone explain the reason for this ? /usr/include/boost/graph/edmonds_karp_max_flow.hpp: In function ‘typename boost::property_traits<IndexMap>::value_type boost::edmonds_karp_max_flow(Graph&, typename boost::graph_traits<Graph>::vertex_descriptor, typename boost::graph_traits<Graph>::vertex_descriptor, CapacityEdgeMap, ResidualCapacityEdgeMap, ReverseEdgeMap, ColorMap, PredEdgeMap) [with Graph = Graph, CapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_capacity_t>, ResidualCapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t>, ReverseEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_reverse_t>, ColorMap = boost::default_color_type*, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*]’: boost_funcs.h:161: instantiated from here /usr/include/boost/graph/edmonds_karp_max_flow.hpp:99: error: array subscript is not an integer boost_funcs.h:161: instantiated from here /usr/include/boost/graph/edmonds_karp_max_flow.hpp:100: error: array subscript is not an integer boost_funcs.h:161: instantiated from here /usr/include/boost/graph/edmonds_karp_max_flow.hpp:106: error: array subscript is not an integer In file included from /usr/include/boost/graph/edmonds_karp_max_flow.hpp:22, from boost_funcs.h:20, from vertex_walk.h:21, from graph_miner.cpp:14: /usr/include/boost/graph/breadth_first_search.hpp: In function ‘void boost::breadth_first_search(const VertexListGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, Buffer&, BFSVisitor, ColorMap) [with VertexListGraph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Buffer = boost::queue<void*, std::deque<void*, std::allocator<void*> > >, BFSVisitor = boost::bfs_visitor<boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge> >, ColorMap = boost::default_color_type*]’: /usr/include/boost/graph/edmonds_karp_max_flow.hpp:102: instantiated from ‘typename boost::property_traits<IndexMap>::value_type boost::edmonds_karp_max_flow(Graph&, typename boost::graph_traits<Graph>::vertex_descriptor, typename boost::graph_traits<Graph>::vertex_descriptor, CapacityEdgeMap, ResidualCapacityEdgeMap, ReverseEdgeMap, ColorMap, PredEdgeMap) [with Graph = Graph, CapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_capacity_t>, ResidualCapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t>, ReverseEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_reverse_t>, ColorMap = boost::default_color_type*, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*]’ boost_funcs.h:161: instantiated from here /usr/include/boost/graph/breadth_first_search.hpp:105: error: no matching function for call to ‘put(boost::default_color_type*&, void*&, boost::default_color_type)’ In file included from boost_funcs.h:20, from vertex_walk.h:21, from graph_miner.cpp:14: /usr/include/boost/graph/edmonds_karp_max_flow.hpp: In function ‘void boost::detail::augment(Graph&, typename boost::graph_traits<Graph>::vertex_descriptor, typename boost::graph_traits<Graph>::vertex_descriptor, PredEdgeMap, ResCapMap, RevEdgeMap) [with Graph = boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, ResCapMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t>, RevEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_reverse_t>]’: /usr/include/boost/graph/edmonds_karp_max_flow.hpp:107: instantiated from ‘typename boost::property_traits<IndexMap>::value_type boost::edmonds_karp_max_flow(Graph&, typename boost::graph_traits<Graph>::vertex_descriptor, typename boost::graph_traits<Graph>::vertex_descriptor, CapacityEdgeMap, ResidualCapacityEdgeMap, ReverseEdgeMap, ColorMap, PredEdgeMap) [with Graph = Graph, CapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_capacity_t>, ResidualCapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t>, ReverseEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_reverse_t>, ColorMap = boost::default_color_type*, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*]’ boost_funcs.h:161: instantiated from here /usr/include/boost/graph/edmonds_karp_max_flow.hpp:55: error: array subscript is not an integer /usr/include/boost/graph/edmonds_karp_max_flow.hpp:107: instantiated from ‘typename boost::property_traits<IndexMap>::value_type boost::edmonds_karp_max_flow(Graph&, typename boost::graph_traits<Graph>::vertex_descriptor, typename boost::graph_traits<Graph>::vertex_descriptor, CapacityEdgeMap, ResidualCapacityEdgeMap, ReverseEdgeMap, ColorMap, PredEdgeMap) [with Graph = Graph, CapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_capacity_t>, ResidualCapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t>, ReverseEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_reverse_t>, ColorMap = boost::default_color_type*, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*]’ boost_funcs.h:161: instantiated from here /usr/include/boost/graph/edmonds_karp_max_flow.hpp:60: error: array subscript is not an integer /usr/include/boost/graph/edmonds_karp_max_flow.hpp:64: error: array subscript is not an integer /usr/include/boost/graph/edmonds_karp_max_flow.hpp:69: error: array subscript is not an integer In file included from /usr/include/boost/graph/edmonds_karp_max_flow.hpp:22, from boost_funcs.h:20, from vertex_walk.h:21, from graph_miner.cpp:14: /usr/include/boost/graph/breadth_first_search.hpp: In function ‘void boost::breadth_first_visit(const IncidenceGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, Buffer&, BFSVisitor, ColorMap) [with IncidenceGraph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Buffer = boost::queue<void*, std::deque<void*, std::allocator<void*> > >, BFSVisitor = boost::bfs_visitor<boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge> >, ColorMap = boost::default_color_type*]’: /usr/include/boost/graph/breadth_first_search.hpp:107: instantiated from ‘void boost::breadth_first_search(const VertexListGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, Buffer&, BFSVisitor, ColorMap) [with VertexListGraph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Buffer = boost::queue<void*, std::deque<void*, std::allocator<void*> > >, BFSVisitor = boost::bfs_visitor<boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge> >, ColorMap = boost::default_color_type*]’ /usr/include/boost/graph/edmonds_karp_max_flow.hpp:102: instantiated from ‘typename boost::property_traits<IndexMap>::value_type boost::edmonds_karp_max_flow(Graph&, typename boost::graph_traits<Graph>::vertex_descriptor, typename boost::graph_traits<Graph>::vertex_descriptor, CapacityEdgeMap, ResidualCapacityEdgeMap, ReverseEdgeMap, ColorMap, PredEdgeMap) [with Graph = Graph, CapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_capacity_t>, ResidualCapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t>, ReverseEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_reverse_t>, ColorMap = boost::default_color_type*, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*]’ boost_funcs.h:161: instantiated from here /usr/include/boost/graph/breadth_first_search.hpp:72: error: no matching function for call to ‘put(boost::default_color_type*&, void*&, boost::default_color_type)’ /usr/include/boost/graph/breadth_first_search.hpp:107: instantiated from ‘void boost::breadth_first_search(const VertexListGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, Buffer&, BFSVisitor, ColorMap) [with VertexListGraph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Buffer = boost::queue<void*, std::deque<void*, std::allocator<void*> > >, BFSVisitor = boost::bfs_visitor<boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge> >, ColorMap = boost::default_color_type*]’ /usr/include/boost/graph/edmonds_karp_max_flow.hpp:102: instantiated from ‘typename boost::property_traits<IndexMap>::value_type boost::edmonds_karp_max_flow(Graph&, typename boost::graph_traits<Graph>::vertex_descriptor, typename boost::graph_traits<Graph>::vertex_descriptor, CapacityEdgeMap, ResidualCapacityEdgeMap, ReverseEdgeMap, ColorMap, PredEdgeMap) [with Graph = Graph, CapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_capacity_t>, ResidualCapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t>, ReverseEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_reverse_t>, ColorMap = boost::default_color_type*, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*]’ boost_funcs.h:161: instantiated from here /usr/include/boost/graph/breadth_first_search.hpp:78: error: no matching function for call to ‘get(boost::default_color_type*&, void*&)’ /usr/include/boost/graph/breadth_first_search.hpp:107: instantiated from ‘void boost::breadth_first_search(const VertexListGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, Buffer&, BFSVisitor, ColorMap) [with VertexListGraph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Buffer = boost::queue<void*, std::deque<void*, std::allocator<void*> > >, BFSVisitor = boost::bfs_visitor<boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge> >, ColorMap = boost::default_color_type*]’ /usr/include/boost/graph/edmonds_karp_max_flow.hpp:102: instantiated from ‘typename boost::property_traits<IndexMap>::value_type boost::edmonds_karp_max_flow(Graph&, typename boost::graph_traits<Graph>::vertex_descriptor, typename boost::graph_traits<Graph>::vertex_descriptor, CapacityEdgeMap, ResidualCapacityEdgeMap, ReverseEdgeMap, ColorMap, PredEdgeMap) [with Graph = Graph, CapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_capacity_t>, ResidualCapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t>, ReverseEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_reverse_t>, ColorMap = boost::default_color_type*, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*]’ boost_funcs.h:161: instantiated from here /usr/include/boost/graph/breadth_first_search.hpp:80: error: no matching function for call to ‘put(boost::default_color_type*&, void*&, boost::default_color_type)’ /usr/include/boost/graph/breadth_first_search.hpp:107: instantiated from ‘void boost::breadth_first_search(const VertexListGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, Buffer&, BFSVisitor, ColorMap) [with VertexListGraph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Buffer = boost::queue<void*, std::deque<void*, std::allocator<void*> > >, BFSVisitor = boost::bfs_visitor<boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge> >, ColorMap = boost::default_color_type*]’ /usr/include/boost/graph/edmonds_karp_max_flow.hpp:102: instantiated from ‘typename boost::property_traits<IndexMap>::value_type boost::edmonds_karp_max_flow(Graph&, typename boost::graph_traits<Graph>::vertex_descriptor, typename boost::graph_traits<Graph>::vertex_descriptor, CapacityEdgeMap, ResidualCapacityEdgeMap, ReverseEdgeMap, ColorMap, PredEdgeMap) [with Graph = Graph, CapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_capacity_t>, ResidualCapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t>, ReverseEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_reverse_t>, ColorMap = boost::default_color_type*, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*]’ boost_funcs.h:161: instantiated from here /usr/include/boost/graph/breadth_first_search.hpp:87: error: no matching function for call to ‘put(boost::default_color_type*&, void*&, boost::default_color_type)’ In file included from /usr/include/boost/graph/edmonds_karp_max_flow.hpp:18, from boost_funcs.h:20, from vertex_walk.h:21, from graph_miner.cpp:14: /usr/include/boost/property_map/property_map.hpp: In member function ‘void boost::ReadablePropertyMapConcept<PMap, Key>::constraints() [with PMap = boost::default_color_type*, Key = void*]’: /usr/include/boost/concept/detail/has_constraints.hpp:40: instantiated from ‘const bool boost::concept::not_satisfied<boost::ReadablePropertyMapConcept<boost::default_color_type*, void*> >::value’ /usr/include/boost/concept/detail/has_constraints.hpp:43: instantiated from ‘boost::concept::not_satisfied<boost::ReadablePropertyMapConcept<boost::default_color_type*, void*> >’ /usr/include/boost/mpl/if.hpp:67: instantiated from ‘boost::mpl::if_<boost::concept::not_satisfied<boost::ReadablePropertyMapConcept<boost::default_color_type*, void*> >, boost::concept::constraint<boost::ReadablePropertyMapConcept<boost::default_color_type*, void*> >, boost::concept::requirement<boost::ReadablePropertyMapConcept<boost::default_color_type*, void*> > >’ /usr/include/boost/concept/detail/general.hpp:19: instantiated from ‘boost::concept::requirement_<void (*)(boost::ReadablePropertyMapConcept<boost::default_color_type*, void*>)>’ /usr/include/boost/concept_check.hpp:43: instantiated from ‘void boost::function_requires(Model*) [with Model = boost::ReadablePropertyMapConcept<boost::default_color_type*, void*>]’ /usr/include/boost/property_map/property_map.hpp:220: instantiated from ‘void boost::ReadWritePropertyMapConcept<PMap, Key>::constraints() [with PMap = boost::default_color_type*, Key = void*]’ /usr/include/boost/concept/detail/has_constraints.hpp:40: instantiated from ‘const bool boost::concept::not_satisfied<boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*> >::value’ /usr/include/boost/concept/detail/has_constraints.hpp:43: instantiated from ‘boost::concept::not_satisfied<boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*> >’ /usr/include/boost/mpl/if.hpp:67: instantiated from ‘boost::mpl::if_<boost::concept::not_satisfied<boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*> >, boost::concept::constraint<boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*> >, boost::concept::requirement<boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*> > >’ /usr/include/boost/concept/detail/general.hpp:19: instantiated from ‘boost::concept::requirement_<void (*)(boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*>)>’ /usr/include/boost/concept_check.hpp:43: instantiated from ‘void boost::function_requires(Model*) [with Model = boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*>]’ /usr/include/boost/graph/breadth_first_search.hpp:67: instantiated from ‘void boost::breadth_first_visit(const IncidenceGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, Buffer&, BFSVisitor, ColorMap) [with IncidenceGraph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Buffer = boost::queue<void*, std::deque<void*, std::allocator<void*> > >, BFSVisitor = boost::bfs_visitor<boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge> >, ColorMap = boost::default_color_type*]’ /usr/include/boost/graph/breadth_first_search.hpp:107: instantiated from ‘void boost::breadth_first_search(const VertexListGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, Buffer&, BFSVisitor, ColorMap) [with VertexListGraph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Buffer = boost::queue<void*, std::deque<void*, std::allocator<void*> > >, BFSVisitor = boost::bfs_visitor<boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge> >, ColorMap = boost::default_color_type*]’ /usr/include/boost/graph/edmonds_karp_max_flow.hpp:102: instantiated from ‘typename boost::property_traits<IndexMap>::value_type boost::edmonds_karp_max_flow(Graph&, typename boost::graph_traits<Graph>::vertex_descriptor, typename boost::graph_traits<Graph>::vertex_descriptor, CapacityEdgeMap, ResidualCapacityEdgeMap, ReverseEdgeMap, ColorMap, PredEdgeMap) [with Graph = Graph, CapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_capacity_t>, ResidualCapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t>, ReverseEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_reverse_t>, ColorMap = boost::default_color_type*, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*]’ boost_funcs.h:161: instantiated from here /usr/include/boost/property_map/property_map.hpp:164: error: no matching function for call to ‘get(boost::default_color_type*&, void*&)’ /usr/include/boost/property_map/property_map.hpp: In member function ‘void boost::WritablePropertyMapConcept<PMap, Key>::constraints() [with PMap = boost::default_color_type*, Key = void*]’: /usr/include/boost/concept/detail/has_constraints.hpp:40: instantiated from ‘const bool boost::concept::not_satisfied<boost::WritablePropertyMapConcept<boost::default_color_type*, void*> >::value’ /usr/include/boost/concept/detail/has_constraints.hpp:43: instantiated from ‘boost::concept::not_satisfied<boost::WritablePropertyMapConcept<boost::default_color_type*, void*> >’ /usr/include/boost/mpl/if.hpp:67: instantiated from ‘boost::mpl::if_<boost::concept::not_satisfied<boost::WritablePropertyMapConcept<boost::default_color_type*, void*> >, boost::concept::constraint<boost::WritablePropertyMapConcept<boost::default_color_type*, void*> >, boost::concept::requirement<boost::WritablePropertyMapConcept<boost::default_color_type*, void*> > >’ /usr/include/boost/concept/detail/general.hpp:19: instantiated from ‘boost::concept::requirement_<void (*)(boost::WritablePropertyMapConcept<boost::default_color_type*, void*>)>’ /usr/include/boost/concept_check.hpp:43: instantiated from ‘void boost::function_requires(Model*) [with Model = boost::WritablePropertyMapConcept<boost::default_color_type*, void*>]’ /usr/include/boost/property_map/property_map.hpp:221: instantiated from ‘void boost::ReadWritePropertyMapConcept<PMap, Key>::constraints() [with PMap = boost::default_color_type*, Key = void*]’ /usr/include/boost/concept/detail/has_constraints.hpp:40: instantiated from ‘const bool boost::concept::not_satisfied<boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*> >::value’ /usr/include/boost/concept/detail/has_constraints.hpp:43: instantiated from ‘boost::concept::not_satisfied<boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*> >’ /usr/include/boost/mpl/if.hpp:67: instantiated from ‘boost::mpl::if_<boost::concept::not_satisfied<boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*> >, boost::concept::constraint<boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*> >, boost::concept::requirement<boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*> > >’ /usr/include/boost/concept/detail/general.hpp:19: instantiated from ‘boost::concept::requirement_<void (*)(boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*>)>’ /usr/include/boost/concept_check.hpp:43: instantiated from ‘void boost::function_requires(Model*) [with Model = boost::ReadWritePropertyMapConcept<boost::default_color_type*, void*>]’ /usr/include/boost/graph/breadth_first_search.hpp:67: instantiated from ‘void boost::breadth_first_visit(const IncidenceGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, Buffer&, BFSVisitor, ColorMap) [with IncidenceGraph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Buffer = boost::queue<void*, std::deque<void*, std::allocator<void*> > >, BFSVisitor = boost::bfs_visitor<boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge> >, ColorMap = boost::default_color_type*]’ /usr/include/boost/graph/breadth_first_search.hpp:107: instantiated from ‘void boost::breadth_first_search(const VertexListGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, Buffer&, BFSVisitor, ColorMap) [with VertexListGraph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Buffer = boost::queue<void*, std::deque<void*, std::allocator<void*> > >, BFSVisitor = boost::bfs_visitor<boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge> >, ColorMap = boost::default_color_type*]’ /usr/include/boost/graph/edmonds_karp_max_flow.hpp:102: instantiated from ‘typename boost::property_traits<IndexMap>::value_type boost::edmonds_karp_max_flow(Graph&, typename boost::graph_traits<Graph>::vertex_descriptor, typename boost::graph_traits<Graph>::vertex_descriptor, CapacityEdgeMap, ResidualCapacityEdgeMap, ReverseEdgeMap, ColorMap, PredEdgeMap) [with Graph = Graph, CapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_capacity_t>, ResidualCapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t>, ReverseEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_reverse_t>, ColorMap = boost::default_color_type*, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*]’ boost_funcs.h:161: instantiated from here /usr/include/boost/property_map/property_map.hpp:195: error: no matching function for call to ‘put(boost::default_color_type*&, void*&, boost::default_color_type&)’ In file included from /usr/include/boost/graph/breadth_first_search.hpp:22, from /usr/include/boost/graph/edmonds_karp_max_flow.hpp:22, from boost_funcs.h:20, from vertex_walk.h:21, from graph_miner.cpp:14: /usr/include/boost/graph/visitors.hpp: In member function ‘void boost::edge_predecessor_recorder<PredEdgeMap, Tag>::operator()(Edge, const Graph&) [with Edge = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, Graph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, Tag = boost::on_tree_edge]’: /usr/include/boost/graph/visitors.hpp:109: instantiated from ‘void boost::detail::invoke_dispatch(Visitor&, T, Graph&, mpl_::true_) [with Visitor = boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge>, T = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, Graph = const boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>]’ /usr/include/boost/graph/visitors.hpp:140: instantiated from ‘void boost::invoke_visitors(Visitor&, T, Graph&, Tag) [with Visitor = boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge>, T = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, Graph = const boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Tag = boost::on_tree_edge]’ /usr/include/boost/graph/breadth_first_search.hpp:155: instantiated from ‘boost::graph::bfs_visitor_event_not_overridden boost::bfs_visitor<Visitors>::tree_edge(Edge, Graph&) [with Edge = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, Graph = const boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Visitors = boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge>]’ /usr/include/boost/graph/breadth_first_search.hpp:79: instantiated from ‘void boost::breadth_first_visit(const IncidenceGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, Buffer&, BFSVisitor, ColorMap) [with IncidenceGraph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Buffer = boost::queue<void*, std::deque<void*, std::allocator<void*> > >, BFSVisitor = boost::bfs_visitor<boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge> >, ColorMap = boost::default_color_type*]’ /usr/include/boost/graph/breadth_first_search.hpp:107: instantiated from ‘void boost::breadth_first_search(const VertexListGraph&, typename boost::graph_traits<Graph>::vertex_descriptor, Buffer&, BFSVisitor, ColorMap) [with VertexListGraph = boost::filtered_graph<boost::adjacency_list<boost::listS, boost::listS, boost::bidirectionalS, boost::property<boost::vertex_name_t, int, boost::no_property>, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::no_property, boost::listS>, boost::is_residual_edge<boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t> >, boost::keep_all>, Buffer = boost::queue<void*, std::deque<void*, std::allocator<void*> > >, BFSVisitor = boost::bfs_visitor<boost::edge_predecessor_recorder<boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*, boost::on_tree_edge> >, ColorMap = boost::default_color_type*]’ /usr/include/boost/graph/edmonds_karp_max_flow.hpp:102: instantiated from ‘typename boost::property_traits<IndexMap>::value_type boost::edmonds_karp_max_flow(Graph&, typename boost::graph_traits<Graph>::vertex_descriptor, typename boost::graph_traits<Graph>::vertex_descriptor, CapacityEdgeMap, ResidualCapacityEdgeMap, ReverseEdgeMap, ColorMap, PredEdgeMap) [with Graph = Graph, CapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_capacity_t>, ResidualCapacityEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, long int, long int&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_residual_capacity_t>, ReverseEdgeMap = boost::adj_list_edge_property_map<boost::bidirectional_tag, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&, void*, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_residual_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>, boost::no_property> > >, boost::edge_reverse_t>, ColorMap = boost::default_color_type*, PredEdgeMap = boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*]’ boost_funcs.h:161: instantiated from here /usr/include/boost/graph/visitors.hpp:176: error: no matching function for call to ‘put(boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>*&, void*, boost::detail::edge_desc_impl<boost::bidirectional_tag, void*>&)’ -- Pranay Anchuri Computer Science Graduate Student Rensselaer Polytechnic Institute Troy,NY

2 3

Boost SSL with Visual Studio 2010 and OpenSSL
by David W 19 Feb '12

19 Feb '12

Hello, I'm trying to compile the Boost 1.47 ASIO SSL server and client examples. I can sucessfully incorporate Boost into my project, but I cannot incorporate OpenSSL. When I try to add it I get the errors: 1>SSLServer.obj : error LNK2019: unresolved external symbol _ERR_reason_error_string referenced in function "public: virtual class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall boost::asio::error::detail::ssl_category::message(int)const " (?message@ssl_category@detail@error@asio@boost@@UBE?AV?$basic_string@DU ?$char_traits@D@std@@V?$allocator@D@2@@std@@H@Z) 1>SSLServer.obj : error LNK2019: unresolved external symbol _CRYPTO_set_id_callback referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::do_init(void)" (??0do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>SSLServer.obj : error LNK2019: unresolved external symbol _CRYPTO_set_locking_callback referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::do_init(void)" (??0do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>SSLServer.obj : error LNK2019: unresolved external symbol _CRYPTO_num_locks referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::do_init(void)" (??0do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>SSLServer.obj : error LNK2019: unresolved external symbol _SSL_load_error_strings referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::do_init(void)" (??0do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>SSLServer.obj : error LNK2019: unresolved external symbol _SSL_library_init referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::do_init(void)" (??0do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>SSLServer.obj : error LNK2019: unresolved external symbol _ENGINE_cleanup referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::~do_init(void)" (??1do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>SSLServer.obj : error LNK2019: unresolved external symbol _CONF_modules_unload referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::~do_init(void)" (??1do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>SSLServer.obj : error LNK2019: unresolved external symbol _CRYPTO_cleanup_all_ex_data referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::~do_init(void)" (??1do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>SSLServer.obj : error LNK2019: unresolved external symbol _EVP_cleanup referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::~do_init(void)" (??1do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>SSLServer.obj : error LNK2019: unresolved external symbol _ERR_remove_state referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::~do_init(void)" (??1do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>SSLServer.obj : error LNK2019: unresolved external symbol _ERR_free_strings referenced in function "public: __thiscall boost::asio::ssl::detail::openssl_init_base::do_init::~do_init(void)" (??1do_init@openssl_init_base@detail@ssl@asio@boost@@QAE@XZ) 1>C:\Users\Epicism\Documents\Visual Studio 2010\Projects\SSLServer\Debug\SSLServer.exe : fatal error LNK1120: 12 unresolved externals 1> 1>Build FAILED. I have tried adding the directory C:\OpenSSL-Win32\lib\, C:\OpenSSL-Win32\lib\VC\, C:\OpenSSL-Win32\lib\VC\static, C:\OpenSSL-Win32\bin, C:\OpenSSL-Win32\include to Project->General Properties->Linker->Additional Library Directories using the openssl pre-compiled libraries ( http://www.openssl.org/related/binaries.html) I have also tried compiling OpenSSL myself with the same errors. I'm really at a loss, I have tried everything I have searched Google about a thousand times, tried IRC, every combination of directories I can think of... My setup is: Windows 7 64-bit Windows Visual Studio 2010 64 bit Boost 1.47 OpenSSL 1.0.0E and G C/C++ Additional Include Directories: C:\Program Files %28x86%29\boost\boost_1_47;C:\openssl\include\;C:\OpenSSL-Win32\lib;%(AdditionalIncludeDirectories) Project->General Properties->Linker->Additional Library Directories: C:\Program Files %28x86%29\boost\boost_1_47\lib;C:\openssl\lib;C:\openssl;%(AdditionalLibraryDirectories) - I've tried adding every directory to this property as well.... Right now I'm just trying to compile the following in a VS C++ console project: // SSLServer.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <cstdlib> #include <iostream> #include <boost/bind.hpp> #include <boost/asio.hpp> #include <boost/asio/ssl.hpp> int _tmain(int argc, _TCHAR* argv[]) { return 0; } Thanks in advance. David

1 0

[serialization] issues when writing non-intrusive code
by Sean Farrow 18 Feb '12

18 Feb '12

Hi: I am writing some non-intrusive serialization code for other c++ classes. I am trying to serialize the wxString class from the wxWidgets library. I have the following code: namespace boost { namespace serialization { template<class Archive> void serialize(Archive & ar, wxString & str, const unsigned int version) { ar & str.ToStdWstring(); } } } I noticed the following two typedefs in the wxWidgets code: typedef std::wstring wxStdWideString; typedef std::basic_string<wchar_t> wxStdWideString; only one of these is executed. I then wrote a second unintrusive serialization class: namespace boost { namespace serialization { template<class Archive> void serialize(Archive & ar, wxString & str, const unsigned int version) { ar & str; } } } I am getting the following error, using visual c++ 2010: 1>c:\program files (x86)\boost\boost\archive\basic_xml_oarchive.hpp(92): error C2664: 'boost::mpl::assertion_failed' : cannot convert parameter 1 from 'boost::mpl::failed ************boost::serialization::is_wrapper<T>::* ***********' to 'boost::mpl::assert<false>::type' with [ T=const wxStdWideString ] Given that I have written code to serialize the wxStdWideString typedef, does anyone know what is happening? Are typedefs ignored with boost serialization. Currently using 1.47. Cheers Sean.

2 2

[asio] mingw compile problem
by Tim Blechmann 18 Feb '12

18 Feb '12

hi all, i'm using asio successfully on both linux and osx. but when compiling via mingw, i get the two compile errors, both are related to const-correctness. problem 1: In file included from /home/tim/workspace/supercollider/external_libraries/boost/boost/asio/detail/win_iocp_serial_port_service.hpp:225, from /home/tim/workspace/supercollider/external_libraries/boost/boost/asio/serial_port_service.hpp:26, from /home/tim/workspace/supercollider/external_libraries/boost/boost/asio/basic_serial_port.hpp:30, from /home/tim/workspace/supercollider/external_libraries/boost/boost/asio.hpp:25, from /home/tim/workspace/supercollider/server/supernova/sc/../server/../sc/../utilities/osc_server.hpp:25, from /home/tim/workspace/supercollider/server/supernova/sc/../server/../sc/sc_osc_handler.hpp:35, from /home/tim/workspace/supercollider/server/supernova/sc/../server/server.hpp:27, from /home/tim/workspace/supercollider/server/supernova/sc/sc_plugin_interface.cpp:31: /home/tim/workspace/supercollider/external_libraries/boost/boost/asio/detail/impl/win_iocp_serial_port_service.ipp: In member function ‘boost::system::error_code boost::asio::detail::win_iocp_serial_port_service::open(boost::asio::detail::win_iocp_handle_service::implementation_type&, const std::string&, boost::system::error_code&)’: /home/tim/workspace/supercollider/external_libraries/boost/boost/asio/detail/impl/win_iocp_serial_port_service.ipp:58: error: invalid conversion from ‘const char*’ to ‘CHAR*’ /home/tim/workspace/supercollider/external_libraries/boost/boost/asio/detail/impl/win_iocp_serial_port_service.ipp:58: error: initializing argument 1 of ‘void* CreateFileA(CHAR*, DWORD, DWORD, _SECURITY_ATTRIBUTES*, DWORD, DWORD, void*)’ problem 2: /home/tim/workspace/supercollider/external_libraries/boost/boost/asio/buffer.hpp: In function ‘PointerToPodType boost::asio::buffer_cast(const boost::asio::const_buffer&) [with PointerToPodType = void*]’: /home/tim/workspace/supercollider/external_libraries/boost/boost/asio/detail/impl/win_iocp_handle_service.ipp:322: instantiated from here /home/tim/workspace/supercollider/external_libraries/boost/boost/asio/buffer.hpp:428: error: invalid static_cast from type ‘const void*’ to type ‘void*’ any idea, how i can work around these issues? thanks, tim

1 0

[Boost Statechart Library] How to inherit reactions?
by Philipp Bender 18 Feb '12

18 Feb '12

Hi, I'd like to define an abstract state which reacts to a specific event and calls a virtual hook function. In classes which inherit from my base class, I'd like to define those hooks. struct EvHeartBeat : boost::statechart::event<EvHeartBeat> {}; struct EvMyFoo : boost::statechart::event<EvMyFoo> {}; // this is my base class template< class MostDerived, class Context, class InnerInitial = boost::mpl::list<>, boost::statechart::history_mode historyMode = boost::statechart::has_no_history > struct BaseState : public boost::statechart::simple_state< MostDerived, Context, InnerInitial, historyMode > { typedef BaseState< MostDerived, Context, InnerInitial, historyMode > base_state; typedef boost::mpl::list< boost::statechart::custom_reaction< EvHeartBeat > > reactions; const std::string name; virtual boost::statechart::result hook() = 0; boost::statechart::result react ( const EvHeartBeat& e) { return hook(); } }; // this is my derived class struct B : BaseState<B, SomeContext, InitialState > { typedef boost::mpl::list< boost::statechart::custom_reaction<EvMyBar> > my_reactions; typedef boost::mpl::insert_range<my_reactions, boost::mpl::end<my_reactions>::type, BBFState::bbf_state::reactions>::type reactions; boost::statechart::result react ( const EvMyFoo& ) { std::cout << "B's reaction" << std::endl; } }; The derived class needs some explanation: I want it to react to other events as well, therefore the my_reactions typedef. Then I merge the mpl::list reactions from base and derived, this is a bit ugly but should be a generic way to do get the desired result. Now the problem: My compiler (g++-4.4) complains that there is no B::react( const EvHeartBeat& ) method. But it should, it's in the parent class. Furthermore, if I _remove_ the reaction to the other event, it compiles and actually uses the parent's reaction method. Of course I can find a workaround (including some boiler plate code), but as this will be an integral part of my project, I'd like it to be as correct, maintainable and elegant as possible. I'd be happy to get some opinions about what's wrong here, best regards Philipp

2 2

Compiling Boost libraries without libstlport.so on Sun
by Shinil Gangadharan 18 Feb '12

18 Feb '12

Hi, Since libstlport.so is not compatable with libiostream.so, I am trying to get rid of libstlport.so on Sun C++ compiler V5.9. I am currently using boost version 1_46_1. Since boost libraries are dependent on libstlport.so, is there a workaround so that the libraries compile with libiostream.so instead of libstlport.so. Regards, Shinil V.G.

1 0

Is it possible to expose bit-fields through boost.python
by Andy Falanga (afalanga) 17 Feb '12

17 Feb '12

Hi, I'd like to be able expose a struct defined as a bit field in C++ to python. Being a neophyte in Boost, I'm wondering if there's a way to doing this. I'm trying the method that I used when exposing a conventional struct, but the intellisense in Visual Studio is complaining to me that bit-fields can't be exposed. I'm sure most on this list know what I mean, but just in case: struct bitField { char bit1 : 1; char bit2 : 1; char bit34 : 2; char bit567 : 3; char bit8 : 1; }; class_<bitField>("BitField") .def_readwrite("bit1", &bitField::bit1) .def_readwrite("bit2", &bitField::bit2) .def_readwrite("bit34", &bitField::bit34) .def_readwrite("bit567", &bitField::bit567) .def_readwrite("bit8", &bitField::bit8) ; Is there a way of doing this? This pattern is what I used to expose a conventional struct. Thanks, Andy

1 0

Re: [Boost-users] Boost Python and Crypto++
by Boost Users List 17 Feb '12

17 Feb '12

> when I try to import it into Python, I receive this error: > > ImportError: nf_decrypt.so: undefined symbol: > _ZN8CryptoPP21SimpleKeyingInterface6SetKeyEPKhmRKNS_14NameValuePairsE >[...] This does not sound like a Python problem. Are you linking with the appropriate -lfoo switches? -- VZ Thanks VZ! I wasn't linking in Crypto++ correctly. I got it working. Now have to figure out how to convert Python buffer objects to C++ std::strings.

1 0

[asio::serial_port] I can read and write synchronously, but how do I unblock when I want to end?
by Dario Ramos 17 Feb '12

17 Feb '12

I'm using boost::asio::serial_port to read and write to a serial port device. I do the reading inside a boost::thread to take advantage of RS-232 being full-duplex. My read calls are like this one: BYTE b; read( m_SerialPort, boost::asio::buffer(&b,1) ); Everything works OK except for shutdown. When I want to end the thread, it's almost always blocked in a read call. How do I unblock it? I tried: - Calling close on the port: This generates an exception, which I can catch, but I was told I can't distinguish shutdown from error if I do this. - Stopping the io_service I passed to the serial_port's constructor. This had no effect, the thread remained blocked on the read call. -- *Darío Eduardo Ramos* Meditech S.A. www.meditech.com.ar (+54) 01147603300, Interno 31 Av. Julio A. Roca 3456 Florida Oeste, Bs.As. Argentina

4 6

Re: [Boost-users] undefined reference to '__sync_add_and_fetch_4'when cross-compiling boost::asio fors mips
by Jayne 17 Feb '12

17 Feb '12

Hello Andreas, Thank you for the reply. I have made some progress since my initial post, I have found that part of the problem is that I am using gcc 4.2 and the various #defines for atomics assume that 4.2 will have the appropriate support. The compiler expects that `__sync_add_and_fetch_4' will be provided. I've found there is some assembler provided with the compiler which gives a 'atomic_exchange_and_add' macro which I've had working correctly in a demo programme, but I haven't yet got it integrated with boost, though that would be a nice long-term solution. Back to the problem though. I've tried a clean build with BOOST_ASIO_DISABLE_FENCED_BLOCK but I'm still getting the same problem. I've attached the build output below. Here are the steps I took to make the clean build: 1. unzip boost_1_48_0.zip 2. mkdir boost-binary 3. set and export BOOST_BUILD_ROOT=/home/jayne/boost-stb/boost_1_48_0 export BOOST_BUILD_ROOT BOOST_BIN_ROOT=$BOOST_BUILD_ROOT/boost-binary export BOOST_BIN_ROOT 4. ./bootstrap.sh 5. Edit the resulting project-config.jam file (which has been generated for the host x86 system) using gcc : mipsel : mipsel-linux-g++ ; and option.set prefix : /opt/brcm/stblinux-2.6.31 ; option.set exec-prefix : /opt/brcm/stblinux-2.6.31 ; option.set libdir : /opt/brcm/stblinux-2.6.31/lib ; option.set includedir : /opt/brcm/stblinux-2.6.31/include/linux ; 6. Edit tools/build/v2/tools/gcc.jam to remove ‘-pendantic’ option (otherwise the string library assembler will not compile) 7. Run ./b2 cxxflags=-DBOOST_ASIO_DISABLE_FENCED_BLOCK --without-python --without-mpi 8. Run ./b2 threading=multi variant=release link=shared toolset=gcc --build-dir=$BOOST_BIN_ROOT --prefix=/tmp/boost --without-python --without-mpi install While compiling in step 7, a typical compiler line is: "mipsel-linux-g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -pthread -fPIC -DBOOST_ASIO_DISABLE_FENCED_BLOCK -Wextra -Wno-long-long -pedantic -DBOOST_ALL_DYN_LINK=1 -DBOOST_ALL_NO_LIB=1 -DBOOST_SYSTEM_DYN_LINK=1 -DBOOST_SYSTEM_NO_DEPRECATED -DNDEBUG -I"." -c -o "bin.v2/libs/chrono/build/gcc-mipsel/release/threading-multi/process_cpu_clocks.o" "libs/chrono/src/process_cpu_clocks.cpp" This is the output from build: /opt/bcmtools/bin/mipsel-linux-g++ -O2 -I/tmp/boost/include echo_server.o network_utilities.o sha1.o base64.o md5.o uri.o hybi_header.o data.o atomic.o -o echo_server -L/tmp/boost/lib -lboost_regex -lboost_date_time -lboost_program_options -lboost_system -lboost_thread echo_server.o: In function `boost::asio::detail::wait_handler::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned int)': echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail12wait_handlerINS_3_bi6bind_tIvNS_4_mfi3mf0IvN11websocketpp4role6serverINS7_8endpointIS9_NS7_6socket5plainENS7_3log6loggerEEEEEEENS3_5list1INS3_5valueIPSG_EEEEEEE11do_completeEPNS1_15task_io_serviceEPNS1_25task_io_service_operationERKNS_6system10error_codeEj+0x94): undefined reference to `__sync_lock_test_and_set_4' echo_server.o: In function `boost::asio::detail::wait_handler::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned int)': echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail12wait_handlerINS_3_bi6bind_tIvNS_4_mfi3mf1IvN11websocketpp10connectionINS7_8endpointINS7_4role6serverENS7_6socket5plainENS7_3log6loggerEEENSB_ISG_E10connectionENSD_ISG_E10connectionEEERKNS_6system10error_codeEEENS3_5list2INS3_5valueINS_10shared_ptrISL_EEEEPFNS_3argILi1EEEvEEEEEE11do_completeEPNS1_15task_io_serviceEPNS1_25task_io_service_operationESP_j+0xd4): undefined reference to `__sync_lock_test_and_set_4' echo_server.o: In function `boost::asio::detail::reactive_socket_accept_op::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned int)': echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail25reactive_socket_accept_opINS0_12basic_socketINS0_2ip3tcpENS0_21stream_socket_serviceIS5_EEEES5_NS_3_bi6bind_tIvNS_4_mfi3mf2IvN11websocketpp4role6serverINSD_8endpointISF_NSD_6socket5plainENSD_3log6loggerEEEEENS_10shared_ptrINSD_10connectionISL_NSM_10connectionENSI_ISL_E10connectionEEEEERKNS_6system10error_codeEEENS9_5list3INS9_5valueIPSM_EENS10_IST_EEPFNS_3argILi1EEEvEEEEEE11do_completeEPNS1_15task_io_serviceEPNS1_25task_io_service_operationESX_j+0xdc): undefined reference to `__sync_lock_test_and_set_4' echo_server.o: In function `boost::asio::detail::reactive_socket_service_base::start_op(boost::asio::detail::reactive_socket_service_base::base_implementation_type&, int, boost::asio::detail::reactor_op*, bool, bool)': echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail28reactive_socket_service_base8start_opERNS2_24base_implementation_typeEiPNS1_10reactor_opEbb+0x1b0): undefined reference to `__sync_fetch_and_add_4' echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail28reactive_socket_service_base8start_opERNS2_24base_implementation_typeEiPNS1_10reactor_opEbb+0x2b4): undefined reference to `__sync_fetch_and_add_4' echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail28reactive_socket_service_base8start_opERNS2_24base_implementation_typeEiPNS1_10reactor_opEbb+0x2ec): undefined reference to `__sync_fetch_and_add_4' echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail28reactive_socket_service_base8start_opERNS2_24base_implementation_typeEiPNS1_10reactor_opEbb+0x3cc): undefined reference to `__sync_fetch_and_add_4' echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail28reactive_socket_service_base8start_opERNS2_24base_implementation_typeEiPNS1_10reactor_opEbb+0x548): undefined reference to `__sync_fetch_and_add_4' echo_server.o:echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail28reactive_socket_service_base8start_opERNS2_24base_implementation_typeEiPNS1_10reactor_opEbb+0x65c): more undefined references to `__sync_fetch_and_add_4' follow echo_server.o: In function `boost::asio::detail::reactive_socket_send_op::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned int)': echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail23reactive_socket_send_opINS1_17consuming_buffersINS0_12const_bufferEN11websocketpp19shared_const_bufferEEENS1_8write_opINS0_19basic_stream_socketINS0_2ip3tcpENS0_21stream_socket_serviceISB_EEEES6_NS1_14transfer_all_tENS_3_bi6bind_tIvNS_4_mfi3mf1IvNS5_4role6serverINS5_8endpointISL_NS5_6socket5plainENS5_3log6loggerEEEE10connectionINS5_10connectionISR_NSS_10connectionENSO_ISR_E10connectionEEEEERKNS_6system10error_codeEEENSG_5list2INSG_5valueINS_10shared_ptrISY_EEEEPFNS_3argILi1EEEvEEEEEEEE11do_completeEPNS1_15task_io_serviceEPNS1_25task_io_service_operationES13_j+0x1a8): undefined reference to `__sync_lock_test_and_set_4' echo_server.o: In function `boost::asio::detail::reactive_socket_send_op::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned int)': echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail23reactive_socket_send_opINS1_17consuming_buffersINS0_12const_bufferESt6vectorIS4_SaIS4_EEEENS1_8write_opINS0_19basic_stream_socketINS0_2ip3tcpENS0_21stream_socket_serviceISC_EEEES7_NS1_14transfer_all_tENS_3_bi6bind_tIvNS_4_mfi3mf1IvN11websocketpp10connectionINSL_8endpointINSL_4role6serverENSL_6socket5plainENSL_3log6loggerEEENSP_ISU_E10connectionENSR_ISU_E10connectionEEERKNS_6system10error_codeEEENSH_5list2INSH_5valueINS_10shared_ptrISZ_EEEEPFNS_3argILi1EEEvEEEEEEEE11do_completeEPNS1_15task_io_serviceEPNS1_25task_io_service_operationES13_j+0x208): undefined reference to `__sync_lock_test_and_set_4' echo_server.o: In function `boost::asio::detail::epoll_reactor::descriptor_state::perform_io(unsigned int)': echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail13epoll_reactor16descriptor_state10perform_ioEj+0x244): undefined reference to `__sync_fetch_and_add_4' echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail13epoll_reactor16descriptor_state10perform_ioEj+0x324): undefined reference to `__sync_fetch_and_add_4' echo_server.o: In function `boost::asio::detail::epoll_reactor::descriptor_state::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned int)': echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail13epoll_reactor16descriptor_state11do_completeEPNS1_15task_io_serviceEPNS1_25task_io_service_operationERKNS_6system10error_codeEj+0x21c): undefined reference to `__sync_fetch_and_add_4' echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail13epoll_reactor16descriptor_state11do_completeEPNS1_15task_io_serviceEPNS1_25task_io_service_operationERKNS_6system10error_codeEj+0x340): undefined reference to `__sync_fetch_and_add_4' echo_server.o: In function `boost::asio::detail::reactive_socket_recv_op::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned int)': echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail23reactive_socket_recv_opINS0_17mutable_buffers_1ENS1_26read_until_delim_string_opINS0_19basic_stream_socketINS0_2ip3tcpENS0_21stream_socket_serviceIS7_EEEESaIcENS_3_bi6bind_tIvNS_4_mfi3mf2IvN11websocketpp4role6serverINSG_8endpointISI_NSG_6socket5plainENSG_3log6loggerEEEE10connectionINSG_10connectionISO_NSP_10connectionENSL_ISO_E10connectionEEEEERKNS_6system10error_codeEjEENSC_5list3INSC_5valueINS_10shared_ptrISV_EEEEPFNS_3argILi1EEEvEPFNS17_ILi2EEEvEEEEEEEE11do_completeEPNS1_15task_io_serviceEPNS1_25task_io_service_operationES10_j+0x13c): undefined reference to `__sync_lock_test_and_set_4' echo_server.o: In function `boost::asio::detail::reactive_socket_recv_op::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned int)': echo_server.cpp:(.gnu.linkonce.t._ZN5boost4asio6detail23reactive_socket_recv_opINS0_17mutable_buffers_1ENS1_17read_streambuf_opINS0_19basic_stream_socketINS0_2ip3tcpENS0_21stream_socket_serviceIS7_EEEESaIcENS1_19transfer_at_least_tENS_3_bi6bind_tIvNS_4_mfi3mf1IvN11websocketpp10connectionINSH_8endpointINSH_4role6serverENSH_6socket5plainENSH_3log6loggerEEENSL_ISQ_E10connectionENSN_ISQ_E10connectionEEERKNS_6system10error_codeEEENSD_5list2INSD_5valueINS_10shared_ptrISV_EEEEPFNS_3argILi1EEEvEEEEEEEE11do_completeEPNS1_15task_io_serviceEPNS1_25task_io_service_operationESZ_j+0x104): undefined reference to `__sync_lock_test_and_set_4' echo_server.o: In function `websocketpp::message::intrusive_ptr_release(websocketpp::message::data const*)': echo_server.cpp:(.gnu.linkonce.t._ZN11websocketpp7message21intrusive_ptr_releaseEPKNS0_4dataE+0x34): undefined reference to `__sync_fetch_and_add_4' echo_server.cpp:(.gnu.linkonce.t._ZN11websocketpp7message21intrusive_ptr_releaseEPKNS0_4dataE+0x114): undefined reference to `__sync_fetch_and_add_4' echo_server.cpp:(.gnu.linkonce.t._ZN11websocketpp7message21intrusive_ptr_releaseEPKNS0_4dataE+0x244): undefined reference to `__sync_fetch_and_add_4' echo_server.o: In function `std::deque::_M_push_back_aux(boost::intrusive_ptr const">On Fri 17/02/12 07:01 , "Andreas Wehrmann" a.wehrmann(a)centersystems.com sent: On 02/16/2012 10:06 AM, Jayne wrote: > > Hello, > > I'm trying to build Boost 1.48.0 for use with the WebSockets++ library > on a MIPS based embedded Linux board. > > My build machine reports itself as: Linux version 2.6.40.4-5.fc15.x86_64 > (mockbuild(a)x86-10.phx2.fedoraproject.org) (gcc version 4.6.0 20110603 > (Red Hat 4.6.0-10) (GCC) ) #1 SMP Tue Aug 30 14:38:32 UTC 2011 > > My cross-compiler version is: mipsel-linux-g++ (GCC) 4.2.0 20070124 > (prerelease) - BRCM 11ts-20090508. I don't have any control over this as > its provided by the chip manufacturer. > > I can build Boost without any reported errors and can link to and use > most of the libraries without any problems. However, when WebSockets > tries to link to the Boost::asio library I get link errors like this: > > (.gnu.linkonce.t._ZNSt5dequeIN5boost13intrusive_ptrIN11websocketpp7message4dataEEESaIS5_EE16_M_push_back_auxERKS5_+0x30): > undefined reference to `__sync_add_and_fetch_4' > > (.gnu.linkonce.t._ZNSt5dequeIN5boost13intrusive_ptrIN11websocketpp7message4dataEEESaIS5_EE16_M_push_back_auxERKS5_+0x80): > undefined reference to `__sync_add_and_fetch_4' > > (.gnu.linkonce.t._ZN11websocketpp9processor4hybiINS_10connectionINS_8endpointINS_4role6serverENS_6socket5plainENS_3log6loggerEEENS5_ISA_E10connectionENS7_ISA_E10connectionEEEE19prepare_close_frameEN5boost13intrusive_ptrINS_7message4dataEEENS_5close6status5valueERKSs+0xc8): > more undefined references to `__sync_add_and_fetch_4' follow > > I've done enough research to find this has been a problem in the past > with ARM chips and is to do with atomic transactions not being > implemented by gcc for the target machine. I've tried the suggested > fixes for ARM which were to build with either BOOST_SP_DISABLE_THREADS > or BOOST_SP_USE_PTHREADS but that didn't help with my MIPS environment. > > Can anyone make any suggestions as to what I could try next? > > thanks, > > Jayne. > Try this #define: BOOST_ASIO_DISABLE_FENCED_BLOCK -- Dipl.-Ing. (FH) Andreas Wehrmann Software Development -------------------------------------------------------------- Center Communication Systems GmbH Sitz in Wien FN 796 88p, Firmenbuchgericht Wien http://www.centersystems.com [1]">www.centersystems.com Tel.: +43 (0) 190 199 - 3616 Mobile: +43 (0) 664 884 75916 Fax: +43 (0) 190 199 - 2110 E-Mail: a.wehrmann(a)centersystems.com _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users [2]">http://lists.boost.org/mailman/listinfo.cgi/boost-users Links: ------ [1] http://www.centersystems.com [2] http://lists.boost.org/mailman/listinfo.cgi/boost-users

2 1

Remove certificate from asio::ssl::context
by Lloyd 17 Feb '12

17 Feb '12

Hi, I am using a "single context object" loaded with necessary certificates, for a SSL based communication in the server side. The certificates are loaded with the call "use_certificate_file()". Is there any way that I can remove a certificate from the context. If this is not possible, is there any possibility of clearing the context, and reloading only the new necessary certificates? Thanks, Lloyd

1 0

[heap] Boost heap and default constructors for comparators
by Evan Driscoll 17 Feb '12

17 Feb '12

The Boost heap library (at least binomial and fibonacci heaps) requires a default constructor of its comparator in order to call 'pop()' on a heap. I ran into this because I was trying to use a std::binary_negate<> wrapper around another comparator: this has no default constructor. So it's pretty easy to work around; I just have to provide a custom version of binary_negate. However, is this intentional? Should it be fixed? The problem is a little strange; it only surfaces if you call the 'pop()' function of the heap. If you look at the error location, binomial_heap.hpp:831, it is // private constructor, just used in pop() explicit binomial_heap(node_list_type & child_list, size_type size): super_t(value_compare()) To wit, with 1.49 beta 1: #include <boost/heap/binomial_heap.hpp> using namespace boost::heap; struct cmp { # ifdef MAKE_DEFAULT_CONSTRUCTOR cmp() {} # endif cmp(int a) {} bool operator() (int a, int b) const { return a < b; } }; int main() { cmp c(1); binomial_heap<int, compare<cmp> > h(c); h.push(1); # ifdef CALL_POP h.pop(); # endif } Compiling with CALL_POP undefined works. Adding -DCALL_POP then causes a compiler error (the following from GCC 4.3.2, but also witnessed with MSVC10): boost_1_49_0_beta1/boost/heap/binomial_heap.hpp: ... heap.cpp:21: instantiated from here boost_1_49_0_beta1/boost/heap/binomial_heap.hpp:831: error: no matching function for call to ‘cmp::cmp()’ heap.cpp:9: note: candidates are: cmp::cmp(int) heap.cpp:5: note: cmp::cmp(const cmp&) Adding -DMAKE_DEFAULT_CONSTRUCTOR works again.

2 1

Can boost be compiled on WinCE?
by Luke Walker 17 Feb '12

17 Feb '12

Hi,I'm required to compile existing code on WinCE that uses boost::asio, boost::thread, boost::system and boost::spirit (wide strings). I attempted this and made allot of progress but eventually ran into so many dead-ends (locale, wide strings, etc, etc) that I had to quit and make this post. My questions are: Can these 4 libraries be compiled and used on WinCE? I'm not seeking a theoretical answer but rather "Has this been accomplished?". After scouring google, etc for two days straight have not found any reference to any person that actually compiled and got boost working on WinCE. I did however find plenty of evidence that it's being "attempted". Most of the posts remain unanswered. I would appreciate some help here. Thanks and take care.

3 3

undefined reference to '__sync_add_and_fetch_4' when cross-compiling boost::asio fors mips
by Jayne 17 Feb '12

17 Feb '12

Hello, I'm trying to build Boost 1.48.0 for use with the WebSockets++ library on a MIPS based embedded Linux board. My build machine reports itself as: Linux version 2.6.40.4-5.fc15.x86_64 (mockbuild(a)x86-10.phx2.fedoraproject.org) (gcc version 4.6.0 20110603 (Red Hat 4.6.0-10) (GCC) ) #1 SMP Tue Aug 30 14:38:32 UTC 2011 My cross-compiler version is: mipsel-linux-g++ (GCC) 4.2.0 20070124 (prerelease) - BRCM 11ts-20090508. I don't have any control over this as its provided by the chip manufacturer. I can build Boost without any reported errors and can link to and use most of the libraries without any problems. However, when WebSockets tries to link to the Boost::asio library I get link errors like this: (.gnu.linkonce.t._ZNSt5dequeIN5boost13intrusive_ptrIN11websocketpp7message4dataEEESaIS5_EE16_M_push_back_auxERKS5_+0x30): undefined reference to `__sync_add_and_fetch_4' (.gnu.linkonce.t._ZNSt5dequeIN5boost13intrusive_ptrIN11websocketpp7message4dataEEESaIS5_EE16_M_push_back_auxERKS5_+0x80): undefined reference to `__sync_add_and_fetch_4' (.gnu.linkonce.t._ZN11websocketpp9processor4hybiINS_10connectionINS_8endpointINS_4role6serverENS_6socket5plainENS_3log6loggerEEENS5_ISA_E10connectionENS7_ISA_E10connectionEEEE19prepare_close_frameEN5boost13intrusive_ptrINS_7message4dataEEENS_5close6status5valueERKSs+0xc8): more undefined references to `__sync_add_and_fetch_4' follow I've done enough research to find this has been a problem in the past with ARM chips and is to do with atomic transactions not being implemented by gcc for the target machine. I've tried the suggested fixes for ARM which were to build with either BOOST_SP_DISABLE_THREADS or BOOST_SP_USE_PTHREADS but that didn't help with my MIPS environment. Can anyone make any suggestions as to what I could try next? thanks, Jayne.

2 1

[serialization] compile-time detection of whether serialization is implemented for a class
by Nelson, Erik - 2 17 Feb '12

17 Feb '12

I'm using the Serialization library and am trying to find a way to detect at compile-time whether or not serialization is implemented for a given type. For example, if I have #include "boost/archive/binary_oarchive.hpp" #include <strstream> struct A{}; void function() { const A a; std::strstream s; boost::archive::binary_oarchive oa(s); oa << a; } I get an error (as expected) along the lines of C:\work\boost\boost/serialization/access.hpp(118): error C2039: 'serialize' : is not a member of 'A' What I'd like is a compile-time way of detecting that 'A' is not serializable, maybe Boost Type Traits-style, something like is_serializable<A>::value or is_serializable<binary_oarchive, A>::value that can detect whether or not the object has serialization available. If it could work for testing pointer serialization as well (is_serializable<A*>::value or is_ptr_serializable<A>::value) that would be doubly super. Thanks Erik ---------------------------------------------------------------------- This message w/attachments (message) is intended solely for the use of the intended recipient(s) and may contain information that is privileged, confidential or proprietary. If you are not an intended recipient, please notify the sender, and then please delete and destroy all copies and attachments, and be advised that any review or dissemination of, or the taking of any action in reliance on, the information contained in or attached to this message is prohibited. Unless specifically indicated, this message is not an offer to sell or a solicitation of any investment products or other financial product or service, an official confirmation of any transaction, or an official statement of Sender. Subject to applicable law, Sender may intercept, monitor, review and retain e-communications (EC) traveling through its networks/systems and may produce any such EC to regulators, law enforcement, in litigation and as required by law. The laws of the country of each sender/recipient may impact the handling of EC, and EC may be archived, supervised and produced in countries other than the country in which you are located. This message cannot be guaranteed to be secure or free of errors or viruses. References to "Sender" are references to any subsidiary of Bank of America Corporation. Securities and Insurance Products: * Are Not FDIC Insured * Are Not Bank Guaranteed * May Lose Value * Are Not a Bank Deposit * Are Not a Condition to Any Banking Service or Activity * Are Not Insured by Any Federal Government Agency. Attachments that are part of this EC may have additional important disclosures and disclaimers, which you should read. This message is subject to terms available at the following link: http://www.bankofamerica.com/emaildisclaimer. By messaging with Sender you consent to the foregoing.

3 9

Boost Python and Crypto++
by Boost Users List 16 Feb '12

16 Feb '12

Hi, I'm trying to use Crypto++ with boost::python. My code seems to build OK, but when I try to import it into Python, I receive this error: ImportError: nf_decrypt.so: undefined symbol: _ZN8CryptoPP21SimpleKeyingInterface6SetKeyEPKhmRKNS_14NameValuePairsE Here is the cpp source code file: #include <cryptopp/aes.h> #include <cryptopp/hex.h> #include <cryptopp/modes.h> std::string nf_decrypt( const std::string& estring ) { std::string hex_pk = "00000000000000000000000000000000"; std::string hex_iv = "00000000000000000000000000000000"; std::string pk; std::string iv; std::string cipher_text; std::string plain_text; CryptoPP::StringSource ( hex_pk.c_str(), true, new CryptoPP::HexDecoder( new CryptoPP::StringSink(pk) ) ); CryptoPP::StringSource ( hex_iv.c_str(), true, new CryptoPP::HexDecoder( new CryptoPP::StringSink(iv) ) ); CryptoPP::StringSource ( estring.c_str(), true, new CryptoPP::StringSink(cipher_text) ); CryptoPP::AES::Decryption aesDecryption( (byte*)pk.c_str(), CryptoPP::AES::DEFAULT_KEYLENGTH ); CryptoPP::CBC_Mode_ExternalCipher::Decryption cbcDecryption( aesDecryption, (byte*)iv.c_str() ); CryptoPP::StringSource( cipher_text, true, new CryptoPP::StreamTransformationFilter( cbcDecryption, new CryptoPP::StringSink(plain_text))); return plain_text; } // python wrapper #include <boost/python.hpp> BOOST_PYTHON_MODULE(nf_decrypt) { boost::python::def("nf_decrypt", nf_decrypt, boost::python::args("string_to_decrypt"), "nf_decrypt docstring"); } Has anyone built boost python extensions from Crypto++ code? I may try doing the same thing with Botan if Crypto++ in general is problematic. I can send my Jamroot file if that would be helpful. Thanks for any advice.

2 1

[boost.iostreams] using zlib with wide streams
by Sean Farrow 16 Feb '12

16 Feb '12

Hi: Is is possible ot use zlib/bzip2 with wide streams. Any help appreciated. Cheers Sean.

1 0

Re: [Boost-users] Developing a new boost archive
by Roberto Fichera 16 Feb '12

16 Feb '12

Actually I cannot really answer because I haven't had yet a deeper look at the suggest "export" method details. Neverthelss, what I need is an explicit string because certain format might require such information used to instantiate objects of the given class while deserializing in other languages (java or python for example). But also pure text formats optionally provide this information with the purpose of helping the user to understand/verify the content of the result of the serialization. My library, which is written in pure C code for compatibility reasons, does solves easily the problem by stringify the given type via pretty straight macro inside the serialization function itself. Something like opening a type, serialize all the fields and close the type. The use of the macro obviously doesn't work at all when using it under any template declaration because the preprocessor is called earlier in compilation process. I also tried the parsing of the __PRETTY__FUNCTION__ which works perfectly under template function, but this approach is even more un-portable then the demangler, so not really praticable. Sent from my ASUS Eee Pad Larry Evans <cppljevans(a)suddenlink.net> wrote: >On 02/15/12 12:38, Robert Ramey wrote: >> Roberto Fichera wrote: >>> On 02/15/2012 06:01 PM, Robert Ramey wrote: >> >>>> c) Even worse, the aproach above would make even text archives >>>> non-portable between platforms. Of course this is a non-starter. >>>> So you might want to re-think your approach above. >>> >>> I agree totally with you! Actually my constraint is to use gnu >>> toolchain, >>> MSVC and pathscale compilers and eventually LLVM, but this one is not >>> a priority at moment. But, any way still the problem of the demangling >>> portability. >>> >>> By the way, how did you solve the problem ... if you solved it, >>> indeed ;-) ? >> >> It is already solved portably via the "export" functionality. Look >> it up in the documentation. >> >> Robert Ramey >Hi Robert, > >Looking at: > > http://www.boost.org/doc/libs/1_48_0/libs/serialization/doc/serialization.h… > >and reading: > > The system "registers" each class in an archive the first time an > object of that class it is serialized and assigns a sequential > number to it. Next time an object of that class is serialized in > that same archive, this number is written in the archive. So every > class is identified uniquely within the archive. When the archive > is read back in, each new sequence number is re-associated with the > class being read. Note that this implies that "registration" has to > occur during both save and load so that the class-integer table > built on load is identical to the class-integer table built on > save. In fact, the key to whole serialization system is that things > are always saved and loaded in the same sequence. This includes > "registration". > >And paraphrasing part as: > > So every class is identified by this uniquely assigned sequential > number within the archive. > >Then I'd infer that this "uniquely assigned sequential number" play >a role similar to the role of the result of: > > abi::__cxa_demangle( typeid( T ).name(), 0, 0, NULL ); > >in Roberto's post: > > http://article.gmane.org/gmane.comp.lib.boost.user/72805 > >As you mention, Roberto's method is not portable between platforms >(where, of course, a different compiler or even different version >of the same compiler would be a different platform). > >OTOH, as you also mention in the above quote, boost serialization >requires: > > things are always saved and loaded in the same sequence. > >Roberto, would that be a problem for you? > >-regards, >Larry > > > > > >_______________________________________________ >Boost-users mailing list >Boost-users(a)lists.boost.org >http://lists.boost.org/mailman/listinfo.cgi/boost-users

1 1

[Program_options] How to parse a command-line incrementally
by Olaf Meeuwissen 16 Feb '12

16 Feb '12

Hi all, I'm looking to implement an "incremental" command-line parser using Boost.Program_options. The parser should be incremental in the sense that parsing should stop at the first unknown option or positional argument. At this point, my program would pick the next options description and continue parsing with that. This would proceed until the command-line has been parsed completely or the program is no longer interested in the remainder. The idea is to use this for a program that interfaces to a collection of commands that each support a set of actions. The program, commands and actions all have their own list of options, so you get command-lines like so prog [prog-opts] [cmd [cmd-opts] [act [act-opts]]] Eventually, I might want to throw in positional arguments for some or each of these as well. Any suggestions on how to achieve this? My main concerns are with the way Boost.Program_options wants to parse the whole command-line (when using allow_unregistered()) every time and with how to keep track of what still needs to be processed. Thanks in advance, -- Olaf Meeuwissen, LPIC-2 FLOSS Engineer -- AVASYS CORPORATION FSF Associate Member #1962 Help support software freedom http://www.fsf.org/jf?referrer=1962

2 2

Boost Phoenix Arguments Passing & Storage (-- Proper Type?) & Application to RValues -- Possible?
by Matt 15 Feb '12

15 Feb '12

Hi there! I've got a question (two, in fact) regarding Arguments in Boost Phoenix. Assuming using boost::phoenix::arg_names::arg1; using boost::phoenix::val; using boost::phoenix::ref; using boost::phoenix::cref; Why does this compile (and works): int x = 1; int y = 2; std::cout << (arg1 % 2 == 1)(x) << '\n'; std::cout << (arg1 % 2 == 1)(y) << '\n'; while these fail to compile (with an extremely long diagnostic involving "boost::error_cant_deduce_type"): std::cout << (arg1 % 2 == 1)(1) << '\n'; std::cout << (arg1 % 2 == 1)(2) << '\n'; std::cout << (arg1 % 2 == 1)(val(1)) << '\n'; std::cout << (arg1 % 2 == 1)(val(2)) << '\n'; std::cout << (arg1 % 2 == 1)(cref(1)) << '\n'; std::cout << (arg1 % 2 == 1)(cref(2)) << '\n'; I run into this was while attempting to store an Arg. into a variable, i.e.,: auto f = (arg1 % 2 == 1); this works: std::cout << f(x) << '\n'; std::cout << f(y) << '\n'; while this fails: std::cout << f(1) << '\n'; std::cout << f(2) << '\n'; I'm guessing this must be for the same reason the above attempts fail. Another question is, what's the "proper" type of "f" assuming non-C++11 compiler? I'd like to avoid wrappers like boost::function (assuming that's even possible). Later on, I'd like to return such an "f" from a function, hence the question (in C++11 I can get away with decltype for short and easy ones, i.e., prototypes like this "auto newActor() -> decltype((arg1 % 2 == 1))" work, but this becomes inconvenient for longer bodies). A concoction like this compiles but doesn't produce an output: auto f = (val(arg1) % 2 == 1); std::cout << f(val(0)) << '\n'; // and I'm guessing this is very wrong anyway due to unusual behavior. Best, Matt

2 3

Developing a new boost archive
by Roberto Fichera 15 Feb '12

15 Feb '12

Hi All in the list, I'm basically new to boost so I hope to find support here to integrate my own serialization library within the boost archive logic. I would say as premise that I started to have a look in all the boost archive implementation so binary, xml and text trying to understand the logic but that increased my confusion about how to approach the solution of my problem. Confusion that is increased by the lack of my boost knowledge and it's related template programming, of course. By the way I found really instructive the simple_log_archive example that cleanly shows how to "walk" the full tree of the data representation in terms of serialization chain. Furthermore, I would say that my serialization framework does already handle all the representation formats like binary, xml, text, python and many others, so from the boost archive point of view I need just to know very few things: - how to walk the tree representing the serialization chain - how to detect that a new type is being serialized - how to get the type name as string - how to define primitive types - how to manage vectors/arrays - be sure that everything is passed as nvp About the two first, they seems related because the code below seems responsible to walk the tree and call all the serialize functions template< class Archive > struct save_only { template< class T > static void invoke( Archive & ar, const T & t ) { // make sure call is routed through the highest interface that might // be specialized by the user. boost::serialization::serialize_adl( ar, const_cast< T & >( t ), boost::serialization::version< T >::value ); } }; So I've put my two functions that are used to defines types: myserialize_beginType( myserialize &s, char *fieldName, char *type ) myserialize_endType( myserialize &s ) Such as the serialization walk chain looks like: template< class Archive > struct save_only { template< class T > static void invoke( Archive & ar, const T & t ) { // make sure call is routed through the highest interface that might // be specialized by the user. -->> myserialize_beginType( ar.serializer, ar.fieldName, ???type??? ); boost::serialization::serialize_adl( ar, const_cast< T & >( t ), boost::serialization::version< T >::value ); -->> myserialize_endType( ar.serializer ); } }; But actually I don't know how to determine the type name as string to pass to my beginType function. About the place to define primitives, I'm not really sure if it's the right place where I have to put my serialization primitives that maps all my basics types. The prototype of such overloaded function is like myserialize_serialize( "basetype" &t, char * fieldName, myserialize &s ) Actually I've defined something like: #define BOOSTSERIALIZEARCHIVE_PRIMITIVE( __T ) \ simple_log_archive & operator<<( const boost::serialization::nvp< __T > & t )\ {\ myserialize_serialize( t.value(), (char*)t.name(), this->serializer );\ return *this;\ } BOOSTSERIALIZEARCHIVE_PRIMITIVE( char ) BOOSTSERIALIZEARCHIVE_PRIMITIVE( unsigned char ) which seems to work. About managing vectors and array, actually I tried to define something like: template< class Archive > struct use_array_optimization { template < class T > static void invoke( Archive & ar, const T & t ) { myserialize_serialize( (T*)t.address(), ar.fieldName , t.count() * sizeof( T ), ar.serializer ); } }; template< class T > void save( const T &t ) { typedef BOOST_DEDUCED_TYPENAME boost::mpl::eval_if<boost::is_enum< T >, boost::mpl::identity<save_enum_type<simple_log_archive> >, // else -->> BOOST_DEDUCED_TYPENAME boost::mpl::eval_if<boost::is_array< T >, -->> boost::mpl::identity<use_array_optimization<simple_log_archive> >, //else BOOST_DEDUCED_TYPENAME boost::mpl::eval_if< // if it's primitive boost::mpl::equal_to< boost::serialization::implementation_level< T >, boost::mpl::int_<boost::serialization::primitive_type> >, boost::mpl::identity<save_primitive<simple_log_archive> >, // else boost::mpl::identity<save_only<simple_log_archive> > > > >::type typex; typex::invoke( *this, t ); } but this seems not working at all. Finally the last items, be sure that everything is passed as nvp in order to catch each given field name, I simply don't know how to do this check/constraint. Hopefully to get some support. Thanks in advance, Roberto Fichera.

3 9

Dependency Issue
by Guruswamy B M 15 Feb '12

15 Feb '12

Hi, I am using boost python for one of my application. It works fine in a machine where visual studio installed. If visual studio removed then app will through a error ""ImportError: DLL load failed: This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem.". I have searched through internet, but I am not able find a proper solution for this. However i have installed 2008 visual studio redistribution package. Also I resolved dependency problem which is shown by dependency walker. Any help regarding this issue greatly appreciated. Thanks, Guru

3 3

[range] count vs count_if
by Bill Buklis 15 Feb '12

15 Feb '12

The documentation for boost range states that count_if can be expressed as count using a filtered adaptor and then goes on to say that no algorithm needs the _if suffix. I'm having trouble seeing how that is the case. Here is the relevant section from the latest (1.49 beta) documentation <http://www.boost.org/doc/libs/1_49_0_beta1/libs/range/doc/html/range/refere…>. Range Adaptor alternative to count_if algorithm <http://www.boost.org/doc/libs/1_49_0_beta1/libs/range/doc/html/range/refere…> boost::count_if( rng, pred ); can be expressed as boost::count( rng | boost::adaptors::filtered(pred), out ); What this means is that /*no*/ algorithm with the |_if| suffix is needed. First of all, what is "out"? I think this is supposed to be "value" as count requires the value to compare against for the count. But, since it does require the value, this makes the function fundamentally different than count_if which will only count the values that match the predicate. As far as I can tell, this means that "count" will filter values both by the predicate and by the value. What am I missing? How can count_if be properly expressed as count. To me it seems like it can't. -- Bill

5 9

MSVC static linking with Boost
by Andy Falanga (afalanga) 14 Feb '12

14 Feb '12

Hi, The team I work with is working on producing a Boost.Python library. Most of the Boost stuff we're using are header only, however, there is a couple of compiled library usages as well (e.g. regex). How can we make certain that the library we're building is statically linked with the stuff we're using from Boost? This way, we don't have to deploy any other DLLs but our own. I've gathered, from Google and another post here, that most of this magic happens at compile time with auto-linking. However, this isn't going all the way. I continually see Intellisense errors in my Visual Studio output window telling me that mixing static and dynamic Boost libraries is a bad idea (or something similar). So, for Visual Studio 2010, how do I ensure that the libraries are statically linked into our own product? Thanks, Andy

2 1

BoostCon/C++Now! Talk: How I Code and Why
by Gottlob Frege 14 Feb '12

14 Feb '12

I talked about this last year, and this year I've submitted the proposal, so If you volunteered last year (and are still interested) and/or are interested in helping with a particular/peculiar talk at BoostCon/C++Now this year, then read on, and contact me offline: I'm planning on giving a talk, entitled "How I Code and Why". It is not meant to be presumptuous and tell you how *you* should code, but instead just explains how I code - day-to-day - and how I came to these patterns/conclusions. But who cares just about how *I* code, people want to hear how other members of the Boost community - people they've come to know and respect via the boost lists - code. So I'm hoping to have a few co-conspirators on stage with me, and have each explain a fundamental guiding principle that they follow in their every day code, how they came to adopt this principle and why they find it valuable. For example, I will tell the simple story ('epiphany') of why my favourite comment word is 'otherwise', and how this relates to advice you may have heard or read before. I like the flavour of [ simple, real world, specific ] ---> [ general principle ] The goal is to bring a more real world down to earth picture to the sometimes lofty fundamentals found in books and lectures. Instead of a book explaining how a guiding principle makes sense *in theory*, it would be great (I think) to hear how respected members of the community apply these principles in real life. So, if you want to participate, email me, and we will see what we can figure out. (And/or I might just have to track you down based on promises made last year!) Not sure how many people we need. I'm thinking 5-15 mins per 'principle', and I think you only need to present one (I think the weight of picking *just one* principle makes it all the more interesting). Anyhow, we can work out the details as we go along. Tony PS. this is not (yet?!) an accepted talk, but I have a bit of chicken/egg thing here: ie it would help to have a few people on board to show that the talk is viable, and thus be accepted.

3 5

A plea for simpler tools
by Robert Ramey 14 Feb '12

14 Feb '12

Let me start by saying I love Boost and C++ as much or more than anyone here!!! But I'm really frustrated with the boost tools and believe they are a serious impediment to the progress of boost. Here is what I want to be able to do: a) create a directory structure outside of the boost tree which looks like: mylib build include src doc html docbook(maybe) boostbook(maybe) quickbook(maybe) test results ... b) a set of simple tools which 1) can build the library in the src directory 2) can translate quick/boost/doc book to html and place it in that directory 3) run each test in the test directory and add a record to the test/results/... log file which I will either just lookat or post process locally to my personal taste. c) what I don't need 1) tracking dependencies - I want to do this for on library I might be experimenting with. I can do this by hand. 2) I don't need to have my boost tree updated - in fact I want to know that I haven't changed it by just running a simple tool d) current tools: 1) presume that a library is part of the boost directory structure. So the documents show up somewhere in the boost tree. Note when I build the documents on my local boost release image I get pointers to the boost sandbox or on sourceforge.net or whatever. So for boostbook->html would like to be able to say boostbook2html -in <boostbookdir> -out <htmldirectory> or something simple like this. 2) the only way I've found to use the current tools is to create directories in my local boost release tree with my "experimental" library and run bjam. There are two problems with this i) I have to make a jamfile which might be more complicated that first meets the eye ii) I mucks up my boost release tree. iii) it I get something wrong, it fails deep within some bjam script which is extremely difficult to figure out. iv) For an example to iii) above, I had tweaked userconfig.v2 to include the name of my xsltproc program which was found through the path. Later I elimnated the directory of the xsltproc from my path. Later I found I couldn't build my library or run any tests. Turned out that bjam stopped when it failed to find the xsltproc program - even though it wasn't being used. I'm not critisizing bjam. I think it's impossible to make a program as ambituous as this totally perfect. But I question the need for such an elaborate tool for doing what seems to me should be something simple. Of course, I can do this myself - and likely will end up doing so. But: a) I've got other stuff to do b) I can't believe I'm the only one who needs this c) I think that boost tools are "too automatic" for my purposes. I understand the motivation for building all of boost. But for what I want to do it adds a huge layer of "conceptual overhead" that I have to wade through. Before I invest effort in this perhaps there's a way of using existing tools that I'm not aware that get's me closer to what I want and need. Comments welcome. Robert Ramey

4 4

graph planar_face_traversal
by Andreas Fabri 14 Feb '12

14 Feb '12

Hello, I am wondering about the output of the example on the page http://www.boost.org/doc/libs/1_48_0/libs/graph/doc/planar_face_traversal.h… I would expect that the vertices on the border of the outer or unbounded face got reported in reverse order. The vertices of inner faces are reported in clockwise order which makes that for each edge shared by inner faces, we traverse it once from source to target, and once from target to source. This does not hold for edges on the outer face. Is this intentional, or just a documentation bug? Best regards, Andreas -- Andreas Fabri, PhD Chief Officer, GeometryFactory Editor, The CGAL Project phone: +33.492.954.912 skype: andreas.fabri

2 2

Boost Date/Time
by asif saeed 13 Feb '12

13 Feb '12

Hi, I get a run-time error when I run the following code; std::string LocaleFormattedDateTime (::boost::posix_time::ptime pt) { std::string s; std::ostringstream ss; //::boost::posix_time::time_facet * tf = new ::boost::posix_time::time_facet; ::boost::posix_time::time_facet tf; //std::locale custom_locale (std::locale(""), tf); std::locale custom_locale (std::locale(""), &tf); // custom_locale takes ownership of the tf facet ss.imbue (custom_locale); //(*tf).format("%Y%m%d-%H%M%S-%f"); // date time tf.format("%Y%m%d-%H%M%S-%f"); // date time ss << pt; // don't explicitly delete tf - what's wrong with a stack variable? why this runtime error? What is the point of new() above and //what if I don't delete allocated memory here. return ss.str(); } void CurrentDateTimeWithMicroseconds(char s[], int sz = 100) { using namespace boost::posix_time; using namespace std; using boost::date_time::date_facet; ptime t = microsec_clock::local_time(); ostringstream ss; //time_facet *df = new time_facet(); time_facet df; //std::locale loc (std::locale(""), df); std::locale loc (std::locale(""), &df); ss << LocaleFormattedDateTime(t) ; memset(s,0,sz); strcpy(s,ss.str().c_str()); } Can you tell me the problem? I modified this code after copying this from some online source. Thanks in advance, Asif

2 1

[date_time] greg_day_of_week as numeric type
by Claude 13 Feb '12

13 Feb '12

It is possible transform or use the greg_day_of_week (day_of_week() method) as a numeric type? Also seems to me that there is no day_of_month() method. Why? -- View this message in context: http://boost.2283326.n4.nabble.com/date-time-greg-day-of-week-as-numeric-ty… Sent from the Boost - Users mailing list archive at Nabble.com.

2 2

Re: [Boost-users] Poor/erratic boost::interprocess named_semaphore performance
by Davidson, Josh 13 Feb '12

13 Feb '12

Ok, so I converted my example to native Windows semaphores, and it consistently completes in less than 250ms (up to 160x faster). Something is definitely going on. -----Original Message----- From: Davidson, Josh Sent: Sunday, February 12, 2012 9:01 PM To: boost-users(a)lists.boost.org Subject: Poor/erratic boost::interprocess named_semaphore performance I'm experiencing performance issues using named semaphores on Windows 7 x64. Currently, I'm on 1.49 beta 1, but the behavior was similar on 1.48 and 1.47. Below, I'm copying two sample programs. They simply synchronize with one another using a pair of semaphores. To run them, start the first program and then the second. They will synchronize with each other 100k times and then the second program will spit out the elapsed time. You can restart the second program to run again without bringing down the first program. On Windows, the elapsed time the first time around is anywhere from 20 - 40 seconds. If you leave the second program running, the following run will be only about 2-3 seconds. A third run it will be back up to 20-40 seconds, and it will keep bouncing back and forth like that. On Linux, the total elapsed time is consistently less than half a second. I'm guessing the Windows implementation isn't as efficient, but I wouldn't expect it to be 100 times slower than Linux. The other perplexing thing is how wildly different the results are on Windows from run to run. =====================Test1.cpp========================================== #include <boost/date_time/posix_time/posix_time.hpp> using namespace boost::posix_time; #include <boost/interprocess/sync/named_semaphore.hpp> using namespace boost::interprocess; #include <iostream> using namespace std; int main() { named_semaphore::remove("sem1"); named_semaphore::remove("sem2"); named_semaphore sem1(create_only_t(), "sem1", 0); named_semaphore sem2(create_only_t(), "sem2", 0); while(true) { sem1.wait(); sem2.post(); } return 0; } =====================Test2.cpp========================================== #include <boost/interprocess/sync/named_semaphore.hpp> using namespace boost::interprocess; #include <boost/date_time/posix_time/posix_time.hpp> using namespace boost::posix_time; #include <iostream> using namespace std; int main() { const size_t iterations = 100000; named_semaphore sem1(open_only_t(), "sem1"); named_semaphore sem2(open_only_t(), "sem2"); ptime start = boost::posix_time::microsec_clock::local_time(); for(size_t i = 0; i < iterations; ++i) { sem1.post(); sem2.wait(); } ptime end = boost::posix_time::microsec_clock::local_time(); time_duration delta = end - start; double seconds = double(delta.total_nanoseconds())/1000000000.0; cout << "Total elapsed time: " << seconds << endl;; cout << "Time per iteration: " << (seconds/double(iterations)) << endl; return 0; }

3 4

iterating though an inifile section using boost.property_tree
by Sean Farrow 13 Feb '12

13 Feb '12

Hi Fokes: Ok, I've got a standard windows-stle ini file. I can check that a section exists, and then get that section, using it->second, where it is declared as: boost::property_tree::ptree::const_assoc_iterator it; I've then assigned the it->second variable to a new property_tree. What I now need to do is iterate though the tree I've just assigned and get all the section keys/values. I'm using the following code to add them all to a map: std::map<string, string> SectionProps; BOOST_FOREACH(boost::property_tree::ptree::value_type &v, SectionTree) { Key =v.first; Value =v.second; SectionProps.insert(std::make_pair(Key, Value)); } It seems that even though thwe values in the ini file will be strings, of the vorm Key1=valu1 as normal, I am still getting another ptree as my second argument of the pair. How do I obtain the value from this? There are never any sub sections. Any help appreciated. Cheers Sean.

1 0

[tuple] Tuple arithmetic
by Bill Buklis 13 Feb '12

13 Feb '12

Is there any facility to perform arithmetic operations on a tuple? For example: struct data { double a, b; }; data d1 = {1.0, 2.0}; data d2 = {2.5, 5.5}; // These two lines are not valid, but simulate what I want. boost::tie(d1.a, d1.b) *= 10.0; // Multiply each element by 10.0 boost::tie(d1.a, d1.b) += boost::tie(d2.a, d2.b); // Add the elements from the second object After calculations, d1 should equal {12.5, 25.5}; Thanks, -- Bill

4 6

[Format] No implicit conversion to string?
by John M. Dlugosz 13 Feb '12

13 Feb '12

It's shown prominently in the docs that a boost::format object can be sent to an ostream. cout << format("%2% %1%") % 36 % 77; But, there is no easy way to use it where a plain string is needed. E.g. throw runtime_error ( format("%2% %1%") % 36 % 77 ); One must use extra parens and a named function, either throw runtime_error ( (format("%2% %1%") % 36 % 77).str() ); or throw runtime_error ( str(format("%2% %1%") % 36 % 77) ); either of which detracts from the expression. Is there any good reason why an implicit conversion operator to the matching string class was omitted? I'd like to find out if there is some reason, before looking into submitting an update. —John

3 3

Poor/erratic boost::interprocess named_semaphore performance
by Davidson, Josh 13 Feb '12

13 Feb '12

I'm experiencing performance issues using named semaphores on Windows 7 x64. Currently, I'm on 1.49 beta 1, but the behavior was similar on 1.48 and 1.47. Below, I'm copying two sample programs. They simply synchronize with one another using a pair of semaphores. To run them, start the first program and then the second. They will synchronize with each other 100k times and then the second program will spit out the elapsed time. You can restart the second program to run again without bringing down the first program. On Windows, the elapsed time the first time around is anywhere from 20 - 40 seconds. If you leave the second program running, the following run will be only about 2-3 seconds. A third run it will be back up to 20-40 seconds, and it will keep bouncing back and forth like that. On Linux, the total elapsed time is consistently less than half a second. I'm guessing the Windows implementation isn't as efficient, but I wouldn't expect it to be 100 times slower than Linux. The other perplexing thing is how wildly different the results are on Windows from run to run. =====================Test1.cpp========================================== #include <boost/date_time/posix_time/posix_time.hpp> using namespace boost::posix_time; #include <boost/interprocess/sync/named_semaphore.hpp> using namespace boost::interprocess; #include <iostream> using namespace std; int main() { named_semaphore::remove("sem1"); named_semaphore::remove("sem2"); named_semaphore sem1(create_only_t(), "sem1", 0); named_semaphore sem2(create_only_t(), "sem2", 0); while(true) { sem1.wait(); sem2.post(); } return 0; } =====================Test2.cpp========================================== #include <boost/interprocess/sync/named_semaphore.hpp> using namespace boost::interprocess; #include <boost/date_time/posix_time/posix_time.hpp> using namespace boost::posix_time; #include <iostream> using namespace std; int main() { const size_t iterations = 100000; named_semaphore sem1(open_only_t(), "sem1"); named_semaphore sem2(open_only_t(), "sem2"); ptime start = boost::posix_time::microsec_clock::local_time(); for(size_t i = 0; i < iterations; ++i) { sem1.post(); sem2.wait(); } ptime end = boost::posix_time::microsec_clock::local_time(); time_duration delta = end - start; double seconds = double(delta.total_nanoseconds())/1000000000.0; cout << "Total elapsed time: " << seconds << endl;; cout << "Time per iteration: " << (seconds/double(iterations)) << endl; return 0; }

1 0

How to build Boost without any libraries
by Spain, Dr. Jeffry A. 12 Feb '12

12 Feb '12

I would like to be able to build Boost 1.48.0 and install the header-only libraries without any of the libraries that require separate build and installation steps. './bootstrap.sh --without-libraries=all' doesn't work. I don't see this discussed in the getting started guide, or perhaps I am just not picking up on something obvious. Thanks for your suggestions. Jeffry A. Spain Network Administrator Cincinnati Country Day School

2 1

Boost timer library : formatting a cpu_times value always prints zeros ?
by Jean-Francois Romang 12 Feb '12

12 Feb '12

Hello, I'm trying to use the boost::timer library, but I can't get to 'format' function to work : it always prints zero values. I followed the documentation : http://www.boost.org/doc/libs/1_48_0/libs/timer/doc/cpu_timers.html#Default… Here is my code : { boost::timer::cpu_timer cput; someFunctionTakingTime(); std::cout<<cput.elapsed().user/1000000000.0<<std::endl; std::cout<<cput.format(3,"%ws\n")<<std::endl; } Here is the result I get : 0.390002 0.000s Using auto_cpu_timer does not help. Is there something wring in my code ?

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Tokenizer Vs. String Algos
by asif saeed 12 Feb '12

12 Feb '12

Hi, I haven't looked into the code but I wonder if just using string algos would be faster than using Tokenizer in that I can customize. Best regards, Asif

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Tokenizer / offset_separator
by asif saeed 12 Feb '12

12 Feb '12

Hi, I created a class template where the template parameter, which is the size of the array, is used to create a static array of offsets (for offset_separator) in a static function (offsets()) returning a const reference to that local static array. I then call create offset_separator like this: offset_separator sep(offsets(), offsets+T); However, if I have observed it correctly, offset_separator (1.47.0) seems to copy the sequence of offsets into an internal vector. What's wrong with just using the passed array? Best regards, Asif

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