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

[boost::fusion v2 and xpressive] versioning conflicts...
by Ovanes Markarian 09 Aug '07

09 Aug '07

Hello, I am using fusion v2 in my project and first would like to thank for the great lib. I installed this lib into the boost/fusion directory. Today I started using xpressive lib (which is also a great one!!!). Unfortunately xpressive broke my compilation, because it includes things from boost/spirit/fusion and my code includes headers from boost/fusion. Now my assumption: AFAIK spirit/fusion contains version 1. Since I would like to use version 2 I can not simply copy it into the spirit directory, since it can break other things like wave. Is it correct? If yes, does anyone have suggestions on how I should deal with this issues? Detailed compiler errors: E:\libraries\boost\include\boost/fusion/support/detail/access.hpp(24) : error C2953: 'boost::fusion::detail::ref_result' : class template has already been defined E:\libraries\boost\include\boost/spirit/fusion/detail/access.hpp(23) : see declaration of 'boost::fusion::detail::ref_result' E:\libraries\boost\include\boost/fusion/support/detail/access.hpp(34) : error C2953: 'boost::fusion::detail::cref_result' : class template has already been defined E:\libraries\boost\include\boost/spirit/fusion/detail/access.hpp(29) : see declaration of 'boost::fusion::detail::cref_result' E:\libraries\boost\include\boost/fusion/support/detail/access.hpp(40) : error C2953: 'boost::fusion::detail::non_ref_parameter' : class template has already been defined E:\libraries\boost\include\boost/spirit/fusion/detail/access.hpp(37) : see declaration of 'boost::fusion::detail::non_ref_parameter' E:\libraries\boost\include\boost/fusion/support/detail/access.hpp(52) : error C2953: 'boost::fusion::detail::call_param' : class template has already been defined E:\libraries\boost\include\boost/spirit/fusion/detail/access.hpp(43) : see declaration of 'boost::fusion::detail::call_param' With Kind Regards, Ovanes Markarian

3 3

BoostBook survey.
by Rene Rivera 09 Aug '07

09 Aug '07

If any of you follow the wxWidgets dev list you might have noticed they are thinking of changing doc format. I pointed out BoostBook as a possibility. Obviously they would like to see non-Boost uses of BoostBook. So I'm asking the wonderfully varied Boost user community... * Do you use BoostBook in some way? * If so, could you provide an example of how you use it? If you want I can find a place in our growing list of Boost users <http://www.boost.org/doc/html/who_s_using_boost_.html>. -- -- Grafik - Don't Assume Anything -- Redshift Software, Inc. - http://redshift-software.com -- rrivera/acm.org - grafik/redshift-software.com -- 102708583/icq - grafikrobot/aim - grafikrobot/yahoo

1 0

Re: [Boost-users] Boost-users Digest, Vol 1352, Issue 1
by Pranckevicius, Tadas 09 Aug '07

09 Aug '07

> I think I know which ones. These are cryptic error messages. They > happened in my case because of the include order. > I work under VS 2005 with SP2 (whcih you should install by the way). > Make sure you include the system headers (like windows.h) before the > boost headers. VS 2005 SP2? That's strange I cannot find any info about this service pack: http://msdn2.microsoft.com/en-us/vstudio/Aa718359.aspx Tadas

1 0

Re: [Boost-users] Serialization of hashmap
by Hansi Hansi 09 Aug '07

09 Aug '07

Hello, I don't know If I'm wrong. To install boost I have used the installer from boost-consulting. At the moment I'm using version 1.34.0. I have set the configuration makros in the follwing way #define BOOST_HAS_HASH #define BOOST_STD_EXTENSION_NAMESPACE stdext #define STD BOOST_STD_EXTENSION_NAMESPACE The problem is that during compiling I get 2 errors: Error 133 error C2039: 'resize' : is not a member of 'stdext::hash_map<_Kty,_Ty,_Tr>' C:\boost_1_34_0\boost\serialization\hash_collections_load_imp.hpp 46 Error 134 error C2039: 'bucket_count' : is not a member of 'stdext::hash_map<_Kty,_Ty,_Tr>' C:\boost_1_34_0\boost\serialization\hash_collections_save_imp.hpp 43 The test program doesn't work to compile too. There are problems with the following lines: namespace BOOST_STD_EXTENSION_NAMESPACE { template<> struct hash<random_key>{ <<<<<<<<<------------- line 156 std::size_t operator()(const random_key& r) const { return (std::size_t)r; } }; } // namespace BOOST_STD_EXTENSION_NAMESPACE Error 9 error C2143: syntax error : missing ';' before '<' c:\boost_1_34_0\libs\serialization\test\test_map.cpp 156 Is there some other makro that I have to define? Best Regards and many thanks for your help Hansjörg > -----Ursprüngliche Nachricht----- > Von: boost-users(a)lists.boost.org > Gesendet: 09.08.07 08:54:35 > An: boost-users(a)lists.boost.org > Betreff: Re: [Boost-users] Serialization of hashmap > > There is a test program - test_map which should demonstrate the > functionality. > > It depends upon standard boost macros for stdext: so if the test > doesnt invoke the hash map, you might check to see if the config system > is correct. > > Let me know what you find out. > > Robert Ramey > > Hansi Hansi wrote: > > Hello, > > > > Sorry I have forgotten to write the subject in the last post. > > > > is there a possibility to serialize a hash_map with the vc8.0 > > compiler? this compiler has defined a hash_map under the stdext > > namespace. It seems that the implementation in boost doesn't work at > > the moment for this class. > > > > Or is there another hash_map implementation available which can be > > serialized? > > > > Best regards > > Hansjörg > > > > > > _____________________________________________________________________ > > Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! > > http://smartsurfer.web.de/?mc=100071&distributionid=000000000066 > > > > > > <hr> > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > __________________________________________________________________________ Erweitern Sie FreeMail zu einem noch leistungsstärkeren E-Mail-Postfach! Mehr Infos unter http://produkte.web.de/club/?mc=021131

2 1

Memory pool management (v1-34-1)
by cisjar 09 Aug '07

09 Aug '07

I am using memory pool objects and I had a little trouble when ran first time my multi-threaded application under Linux. I looked at sources (detail/mutex.hpp) and in my opinion an automatic recognition the multi-thread mode is done improperly. In my project I used only headers from pool library and I had to explitly defined the BOOST_HAS_THREADS macro. There is not any information about it in documentation. From other boost libraries I know that is not intended to define this macro by users. cisjar

1 0

Serialization of hashmap
by Hansi Hansi 09 Aug '07

09 Aug '07

Hello, Sorry I have forgotten to write the subject in the last post. is there a possibility to serialize a hash_map with the vc8.0 compiler? this compiler has defined a hash_map under the stdext namespace. It seems that the implementation in boost doesn't work at the moment for this class. Or is there another hash_map implementation available which can be serialized? Best regards Hansjörg _____________________________________________________________________ Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! http://smartsurfer.web.de/?mc=100071&distributionid=000000000066

2 1

Fwd: Re: timeout events in Boost.Statechart
by Chris Paulse 08 Aug '07

08 Aug '07

>> I ended up implementing timeout support with a WM_TIMER handler in the >> parent of the state machine class. ... > > Does the WM_TIMER handler really add the event to the queue of the > state_machine subclass object? If so, then you might have introduced > a race condition. WM_TIMER handlers are called in a dedicated thread, > right? >From my understanding of the documentation of SetTimer and my use of it, everything should be working from the same thread (WM_TIMER messages are posted to the main thread's message queue, where they are processed while the thread is idle). So, I don't think there's a race condition. >> Also, like the Camera example, I implemented a >> post_event in the >> constructor/entry of some states, which also requires derivation >> from state, > > Correct. > >> and awkward instancing of the event. > > I don't understand. You mean the special constructor you have to add > to the state, right? Well, that, but more importantly, the cast inside of the post_event. Making calls to post_event from a constructor/enter seem like a fairly typical use case. >> Would using methods (Entry/Exit) >> instead of >> the constructor/destructor ease some of these problems? > > This is a somewhat controversical topic. During formal review there > were a few people who favored entry() and exit() functions over the > current ctor/dtor design. Thanks for the explanation (removed for brevity), and the sample code!

2 1

[program_options] patch - optional argument support (gnu getopt_long style)
by Bryan Green 08 Aug '07

08 Aug '07

Attached is a patch to program_options that implements optional argument support, in the style of GNU getopt_long. It adds one new method to 'value_type': 'implicit_value()'. The idea is that, if the option is given without an argument, it is assigned an "implicit" value. Otherwise, if the long-option is given an explicit argument via the equals sign (--arg=value), or the short-option is given an adjacent argument (-avalue), the explicit value will override the implicit one. For example: desc.add_options() ("proxy,p", value<int>(&proxy_port)->implicit_value(DefaultProxyPort), "run proxy service") ; ... if (vm.count("proxy")) enable_the_proxy(proxy_port); ./prog --proxy --opt2 --opt3 -> enables proxy on default port. ./prog --proxy=9000 --opt2 --opt3 -> enables proxy on port 9000. ./prog --opt2 --opt3 -> does not enable the proxy. -Bryan

3 10

Subject : [Serialization] linker problem, serialization method cannot be found.
by Oliver Kania 08 Aug '07

08 Aug '07

Hello and thanks for the help I received so far. here is my current problem: The class I try to serialize is: class LIBPALO_NG_CLASS_EXPORT CubeCache : public CUBE_INFO { public: friend class boost::serialization::access; CubeCache(); ~CubeCache(); void setSequenceNumber( unsigned int sequenceNumber ) { m_SequenceNumber = sequenceNumber; } unsigned int getSequenceNumber() const { return m_SequenceNumber; } private: unsigned int m_SequenceNumber; template<class Archive> void serialize( Archive &ar, const unsigned int version ); }; the cpp file looks as follows: #include "CubeCache.h" #include <boost/serialization/base_object.hpp> namespace jedox { namespace palo /* palo */ { template<class Archive> void CubeCache::serialize( Archive &ar, const unsigned int version ) { // save/load base class information ar & boost::serialization::base_object<CUBE_INFO>( *this ); ar & m_SequenceNumber; } CubeCache::CubeCache(){;} CubeCache::~CubeCache(){;} } } /* jedox */ The CUBE_INFO structure serializes just fine. There are no linkage problems with the following code: int main( int argc, char* argv[] ) { CUBE_iNFO* const c = new CUBE_INFO(); std::ofstream ofs("filename"); // save data to archive { boost::archive::text_oarchive oa( ofs ); // write class instance to archive oa << ( c ); // archive and stream closed when destructors are called } return 0; } However, when I use CubeCache instead of CUBE_INFO in the above code, i get a linkage error: ====================================================================== libpalo_ng.obj : error LNK2019: unresolved external symbol "private: void __thiscall jedox::palo::CubeCache::serialize<class boost::archive::text_oarchive>(class boost::archive::text_oarchive &,unsigned int)" ... ====================================================================== There are no linkage problems with the library when i do not use boost::serialization. I guess this happens when the linker tries to link with the serialization library. LIBPALO_NG_CLASS_EXPORT is defined as: # define LIBPALO_NG_CLASS_EXPORT __declspec(dllexport) Regards, Oliver

3 2

[serialization] Writing an old version of a class
by Pfligersdorffer, Christian 08 Aug '07

08 Aug '07

Hello Robert, hello all, I know it is stated in the boost::serialization library documentation that per definition always the latest version of a class goes to the archive. I wonder if there is a way to change this behaviour and choose the version number for my class at runtime. Obviously this feature would be useful in a system of two dependent modules where either the producer or the consumer could by updated to a newer version without the other one being neccessarily updated too. Maybe this has already been discussed but I could not find anything about it on the web. However my strong suspicion is that there is no such option within the library and I will have to provide a solution within the affected classes. Another thing: I specialize boost::archive::detail::heap_allocator<T> for my types to use my own memory management :-) Any objection to that? Finally I want to thank Robert Ramey for his fabulous library and his always timely and helpful answers. I think from the user perspective he stands as a positive example for others. Regards, -- Christian Pfligersdorffer EOS Software Engineering

2 3

<kein Betreff>
by Hansi Hansi 08 Aug '07

08 Aug '07

Hello, is there a possibility to serialize a hash_map with the vc8.0 compiler? this compiler has defined a hash_map under the stdext namespace. Or is there another hash_map implementation available which can be serialized? Best regards Hansjörg __________________________________________________________________________ Erweitern Sie FreeMail zu einem noch leistungsstärkeren E-Mail-Postfach! Mehr Infos unter http://produkte.web.de/club/?mc=021131

1 0

Serialization & enums
by Gross, Steve 07 Aug '07

07 Aug '07

Hi folks. I'm learning the basics of the serialization library right now. I'd like to know if there's a known tactic for archiving enums with textual tokens, rather than the int value itself. For instance, consider the following code: I set up an enum called status_t, and a class Foo that has a status_t as a data member. In Foo's serialize function, I record the status_t (myStatus). enum status_t { ON, OFF }; class Foo { status_t myStatus; friend class boost::serialization::access; template<class Archive> serialize(...) { ar & BOOST_SERIALIZATION_NVP(myStatus); } }; The xml output file looks sort of like this: <Foo> <myStatus>0</myStatus> </Foo> The file that is generated when serialize() is invoked certainly works, but the value for myStatus appears as an int. What if I want to convert the int to a string in the archive? That is, I want the xml file to look like this: <Foo> <myStatus>ON</myStatus> </Foo> Are there any good strategies for doing this? Thanks, --Steve (sgross(a)sjm.com)

1 0

term by term product of vectors (or proxies thereof)
by e r 07 Aug '07

07 Aug '07

hi, what's the best way to achieve x*=y? where x and y are vectors (or proxies) of identical size? although i wrote a function (below) i hope there's already some ublas related facility to do so. template<typename D> class Op_product_term_by_term{ public: Op_product_term_by_term(D& dest):iter(dest.begin()),end(dest.end()){}; void operator()(double elem); private: typename D::iterator iter; typename D::iterator end; }; template<typename D> void Op_product_term_by_term<D>::operator()(double elem){ if(iter<end){ *(iter++)*=elem; }else{ throw; }; }; template<typename D, typename B> void product_term_by_term(D& dest,const B& by){ if(dest.size()==by.size()){ for_each(by.begin(),by.end(),Op_product_term_by_term<D>(dest)); }else{ throw; }; }; ps: should i post this kind of ad in boost/ublas or boost/users?

1 0

[DateTime] Functions parsing date/time values from wstring missing?
by Boris 07 Aug '07

07 Aug '07

According to http://www.boost.org/doc/html/date_time/details.html#date_time.changes there have been functions added to Boost.DateTime (between Boost 1.31 to 1.32) to convert date and time classes to wstring. However I can't find any functions to parse date and time values from wstring. There is for example to_iso_extended_wstring() but no from_simple_wstring(). Am I missing something? Boris

1 0

[boost][graph] write_graphviz problem
by David Callu 07 Aug '07

07 Aug '07

Hi, I try to write my graph to std::cout with boost::write_graphviz. In the example boost/libs/graph/example/graphviz.cpp, the graph used is a boost::adjacency_list<vecS, vecS, directedS, property<vertex_name_t, std::string>, property<edge_weight_t, double> > and all work fine. my graph is a boost::adjacency_list<listS, listS, bidirectedS, property<my_vertex_t, my_vertex>, property<my_edge_t, my_edge>, property<my_graph_t, my_graph> , listS > If a do "write_graphviz(std::cout, g);" I have a very big error. (why BGL didn't use boost concept check ???) I search in boost code and i found !!! In the file boost/graph/graphviz.hpp line 257 (boost 1.34) "out << get(vertex_id, *i);" so write_graphviz function get the vertex property with the tag of type vertex_id. By default, the type vertex_id is the enum boost::vertex_index which do reference to the type boost::vertex_index_t; This property is intrinsically in the type boost::adjacency_list<vecS, vecS> because the vertex_descriptor is the index of the vertex. And so all work fine with the function write_graphviz With the type boost::adjacency_list<vecS, listS>, this property is not available. TOOOOOO In the complete signature function : void write_graphviz(std::ostream &, const VertexListGraph & g vertexPropertyWrite vpw, EdgePropertyWriter epw, GraphPropertyWriter gpw, VertexID vertex_id); I can give the property_tag to used in the function. But, In opposition to other BGL algorithm which accept an external PropertyMap, this property must be in the graph. And I don't want to add a index property. Question : How to use write_graphviz algorithm with boost::adjacency_list<listS, listS> ? Is there a magic boost property tag to use with a boost::adjacency_list<listS, listS> like the boost::vertex_index_t tag and the boost::adjacency_list<vecS, vecS> is there another solution ?? Thank David Callu

2 2

[Fusion] Is there a version of fusion that works with vanilla 1.34.1?
by Ames, Andreas (Andreas) 07 Aug '07

07 Aug '07

Hi, is there a version of fusion that works with vanilla 1.34.1? TIA, aa -- Andreas Ames | Programmer | Comergo GmbH | ames AT avaya DOT com Sitz der Gesellschaft: Stuttgart Registergericht: Amtsgericht Stuttgart - HRB 22107 Geschäftsführer: Andreas von Meyer zu Knonow, Udo Bühler, Thomas Kreikemeier

3 5

[iterator_adaptor] Accessing base class
by Mark Ruzon 07 Aug '07

07 Aug '07

I have defined an iterator adaptor called skip_iterator. I found that I have to write: skip_iterator() : skip_iterator::iterator_adaptor_(0), m(1) {} rather than skip_iterator() : iterator_adaptor_(0), m(1) {} even though iterator_adaptor_ is a protected typedef inside iterator_adaptor. Will someone explain why I have to qualify the name? Thanks, Mark Ruzon

4 3

order of iterators in multi_index container
by boost＠larroy.com 07 Aug '07

07 Aug '07

Hi I was using multi_index nicely and then I wondered that although iterators are not invalidated when calling replace or modify, could it be that if I'm modifying inside a loop then incrementing the iterator no longer makes it iterate through all elements because of the index reordering? Regards. -- Pedro Larroy Tovar Promax R&D Lab

4 6

Fwd: Re: timeout events in Boost.Statechart
by Andreas Huber 07 Aug '07

07 Aug '07

Hi Chris, > I ended up implementing timeout support with a WM_TIMER handler in > the > parent of the state machine class. States that can have a timeout > event > just pass their timeout duration to the state machine via > context<>, which > in turn calls SetTimer in the parent class. The WM_TIMER handler > adds a > timeout event to the state machine's queue. Does the WM_TIMER handler really add the event to the queue of the state_machine subclass object? If so, then you might have introduced a race condition. WM_TIMER handlers are called in a dedicated thread, right? > Just to comment on the design, it requires that I declare state > classes with > "state" base class instead of simple_state, as I have to perform > the > context<> cast in the constructor/entry of the new state in order > to set up > a timeout. Correct. > Also, like the Camera example, I implemented a > post_event in the > constructor/entry of some states, which also requires derivation > from state, Correct. > and awkward instancing of the event. I don't understand. You mean the special constructor you have to add to the state, right? > Unfortunately, I'm in feasibility testing, and haven't had an > opportunity to > closely examine the implementation. If you think there's something > I'm > missing, please let me know. See above, WM_TIMER should probably not call state_machine.process_event. Instead you should use asynchronous_machine and queue the event through the scheduler, which is thread-safe. > Would using methods (Entry/Exit) > instead of > the constructor/destructor ease some of these problems? This is a somewhat controversical topic. During formal review there were a few people who favored entry() and exit() functions over the current ctor/dtor design. This is related to the debate whether one should initialize everything in the constructor or do (almost) nothing in the constructor and have the client call Init() right after construction. Sure, in our case entry() would be automatically called by the library immediately after construction but it still runs counter to established C++ practice. The problem with entry() is that it forces you to losen your class invariants, e.g. timerId below can no longer be const, since context<Machine>.StartTimer() could no longer be called in the ctor (where access via context would be impossible) but only in entry(). struct MyState : sc::state<MyState, Machine> { int count_; const int timerId_; MyState(my_context ctx) : my_base(ctx), count_(0), timerId_(context<Machine>.StartTimer(3000)) { // additional stuff } ~MyState() { context<Machine>.StopTimer(timerId_); } } Regards, Andreas > On 8/3/07, Andreas Huber <ahd6974-boostorg(a)yahoo.com> wrote: > > > > Hi Chris > > > > > Since timeouts are so common in state machine applications, do > you > > > think it > > > would make sense to support them as a specific reaction type? > > > > The necessary infrastructure for time events is quite > significant, > > see > > > > > <http://www.boost.org/libs/statechart/doc/uml_mapping.html#TimeEvent> > > > > You basically either need an OS that supports timed callbacks, or > > need to implement your own scheduler, which supports the passing > of a > > time at which a given event must be dispatched. Given the lacking > > primitives in C++, both options require significant platform > > abstraction effort. I always had the hope that either > Boost.Thread or > > a futures library would provide such primitives but to my > knowledge > > nothing has so far materialized. I *guess* Asio does offer such > > primitives but I have a hard time to justify that dependency just > for > > a time event implementation. > > > > To cut a long story short, for now you need to implement time > event > > support yourself :-/. > > > > HTH, > > > > Andreas > > > > P.S. I think this information is also interesting for other boost > > users, so unless you object I'll post this message on the > Boost.Users > > list tomorrow. > >

1 0

simple_ls.cpp build issues
by Grattan, Steven 07 Aug '07

07 Aug '07

Hi, I'm new to the boost libraries and wanted to write something that would give me the names of all the entries in a directory in a platform independent way. Having looked at the filesystem facilities provided with boost I decided that this is just what I need and downlaoded simple_ls.cpp just to check I could compile it before going any further. I'm using Microsoft Visual Studio 2005 Express Edition and I get a few compile errors when I tries to build it. Maybe I'm missing something here but the error messages seem to reflect the reality since the items it can't find don't exist in the boost files provided - I'm using boost 1.3.3.1 Here is the output from the compiler: 1>------ Build started: Project: boostFileSystem, Configuration: Debug Win32 ------ 1>Compiling... 1>simple_ls.cpp 1>z:\visual studio 2005\projects\boostfilesystem\boostfilesystem\simple_ls.cpp(51) : error C2039: 'status' : is not a member of 'boost::filesystem::path' 1> x:\3rdpartytools\boost_1_33_1\boost\filesystem\path.hpp(34) : see declaration of 'boost::filesystem::path' 1>z:\visual studio 2005\projects\boostfilesystem\boostfilesystem\simple_ls.cpp(54) : error C2273: 'function-style cast' : illegal as right side of '->' operator 1>z:\visual studio 2005\projects\boostfilesystem\boostfilesystem\simple_ls.cpp(54) : error C2228: left of '.leaf' must have class/struct/union 1>z:\visual studio 2005\projects\boostfilesystem\boostfilesystem\simple_ls.cpp(56) : error C2039: 'is_regular' : is not a member of 'boost::filesystem' 1>z:\visual studio 2005\projects\boostfilesystem\boostfilesystem\simple_ls.cpp(56) : error C2039: 'status' : is not a member of 'boost::filesystem::path' 1> x:\3rdpartytools\boost_1_33_1\boost\filesystem\path.hpp(34) : see declaration of 'boost::filesystem::path' 1>z:\visual studio 2005\projects\boostfilesystem\boostfilesystem\simple_ls.cpp(56) : error C3861: 'is_regular': identifier not found 1>z:\visual studio 2005\projects\boostfilesystem\boostfilesystem\simple_ls.cpp(59) : error C2273: 'function-style cast' : illegal as right side of '->' operator 1>z:\visual studio 2005\projects\boostfilesystem\boostfilesystem\simple_ls.cpp(59) : error C2228: left of '.leaf' must have class/struct/union 1>z:\visual studio 2005\projects\boostfilesystem\boostfilesystem\simple_ls.cpp(64) : error C2273: 'function-style cast' : illegal as right side of '->' operator 1>z:\visual studio 2005\projects\boostfilesystem\boostfilesystem\simple_ls.cpp(64) : error C2228: left of '.leaf' must have class/struct/union 1>z:\visual studio 2005\projects\boostfilesystem\boostfilesystem\simple_ls.cpp(71) : error C2273: 'function-style cast' : illegal as right side of '->' operator 1>z:\visual studio 2005\projects\boostfilesystem\boostfilesystem\simple_ls.cpp(71) : error C2228: left of '.leaf' must have class/struct/union 1>Build log was saved at "file://\\sw620_f\grattans$\Visual Studio 2005\Projects\boostFileSystem\boostFileSystem\Debug\BuildLog.htm" 1>boostFileSystem - 12 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== Any help would be much appreciated, Steve Grattan This email (including attachments) is confidential and is solely intended for the addressee. Unless you are the addressee, you may not read, use or store this email in any way, or permit others to. If you have received it in error, please contact Visa Europe on +44 (0)20 7937 8111.

2 2

Problem with mpl::joint_view working on two mpl::maps
by Martin Apel 07 Aug '07

07 Aug '07

Hi *, I have two mpl maps like this: typedef map<pair<int_<1>, int_<42> >, pair<int_<2>, int_<43> >, pair<int_<3>, int_<44> > > Map1; typedef map<pair<int_<4>, int_<44> >, pair<int_<5>, int_<45> >, pair<int_<6>, int_<46> > > Map2; I try to join them using "joint_view" as follows: typedef joint_view<Map1, Map2>::type JointMap; which works fine. Then I do std::cout << at<JointMap, int_<2> >::type::value << "\n"; which gives the following compiler error: error: 'value' is not a member of 'boost::mpl::pair<mpl_::int_<3>, mpl_::int_<44> >' I tried this with gcc 3.4.6 and 4.2 under Linux, Boost version is 1.34.0. It seems "at" returns the entry after the searched entry, and not only the right half, but the complete pair. Has anybody got any hints on this? To me it looks like a bug in MPL, but I might be wrong. Best Regards, Martin ____________ Virus checked: AVKB 17.327 from 06.08.2007

1 0

Re: [Boost-users] Boost-users Digest, Vol 1352, Issue 1
by Vial, Florent 07 Aug '07

07 Aug '07

>> I?ve installed Boost Libary 1.34.0 >> I?m working with VS 2005 SP1. >> If I try to include any of the boost *.hpp files I get more than 100 >> errors in the files "memory" and "algorithm". I think this errors >> first >What errors? I think I know which ones. These are cryptic error messages. They happened in my case because of the include order. I work under VS 2005 with SP2 (whcih you should install by the way). Make sure you include the system headers (like windows.h) before the boost headers. Hope this helps, Regards, Florent Arnold & Richter Cine Technik GmbH & Co. Betriebs KG Sitz: Munchen - Registergericht: Amtsgericht Munchen - Handelsregisternummer: HRA 57918 Personlich haftender Gesellschafter: Arnold & Richter Cine Technik GmbH Sitz: Munchen - Registergericht: Amtsgericht Munchen - Handelsregisternummer: HRB 54477 Geschaftsfuhrer: Prof. Dr. Dejan Ilic; Franz Kraus; Jens Schafer Beiratsvorsitzender: Prof. Dr. Hans-Jorg Bullinger

1 0

Problem including hpp Headers
by Wolfgang Issovits 07 Aug '07

07 Aug '07

Hello! I´ve installed Boost Libary 1.34.0 I´m working with VS 2005 SP1. If I try to include any of the boost *.hpp files I get more than 100 errors in the files "memory" and "algorithm". I think this errors first occoured, after installing SP1 for VS. Does anyone has any idea why this errors occour?

2 2

why is there no ChangeLog ? (and tools to create/update one)
by Vincent Torri 07 Aug '07

07 Aug '07

Hey, As a user, I often wanted to see what is fixed in a library. As there is no ChangeLog (afaics), I have to look at the commits in cvs web (in svn, now), which is not very simple to use. So I wanted to know why there were no ChangeLog. I know some other big projects, and they use tools to create and commit automatically a ChangeLog. Here are 2 of them: http://www.buzztard.org/index.php/Coding_Guidelines#CVS_commit_message_form… (for cvs, but i think it can be modified for svn) and https://thomas.apestaart.org/moap/trac regards Vincent Torri PS: i've not subscribed to the boost dev ML. Maybe someone can forward that mail to that list.

1 0

boost array problems.
by chun ping wang 07 Aug '07

07 Aug '07

Hi I have a struct People { const char* fname_; const char* lname_; unsigned int id; } I want to create an array of 3 people. boost::array<People, 3> = { {"Chun", "Wang", 1441}, {"Chia", "Wang", 1443}, {"Ta", "Wang", 1445} }; I get a compile time error too many initializer.

4 5