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

Re: [Boost-users] [Boost.Test] workaround for reported memory leaks when using MFC?
by gast128 15 Apr '09

15 Apr '09

> Unfortunately, when the MFC dll gets unloaded prior to shutdown it invokes > the CRT's memory leak detection routine which falsely reports that any > memory allocated by the (yet to be unloaded) unit test framework has been > leaked. Obviously, the problem here is with MFC and searching the 'net will > yield numerous complaints on the topic. we have the same problem with our normal app. The leak is reported due to a destructor call of a global object. One way to tweak the reporting, is to extend the lifetime of the global object. This can be done by explicitly linking the main application with mfc (on vc++ 7.1: project properties, linker, input, additional properties mfc71d.lib). Make sure to force a relinking / rebuild after setting this. Not sure if this helps for u.

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[parameter] Composing ArgumentPacks
by er 15 Apr '09

15 Apr '09

Hi All, Two argument packs can be composed with the comma operator. However, if each ap is built using positional arguments, it doesn't seem to work, at least as attempted in example (5) below. Any help would be appreciated. BOOST_PARAMETER_KEYWORD(tag, x) BOOST_PARAMETER_KEYWORD(tag, y) template<class ArgumentPack> void f(ArgumentPack const & args){ double x_val = args[x]; double y_val = args[y]; std::cout << "x = " << x_val << ", y = " << y_val << std::endl; } int main() { typedef boost::parameter::parameters< parameter::required<tag::x>, parameter::required<tag::y> > spec_xy_t; double x_val = 9.0; double y_val = 0.1; f((y=y_val,x=x_val)); // (1) f(spec_xy_t()(x=9.0,y=0.1)); // (2) f(spec_xy_t()(x_val,y_val)); // (3) f( ( (y = y_val), (x = x_val) ) ); // (4) //OK so far spec_x_t spec_x; spec_y_t spec_y; f( ( spec_x(x_val),spec_y(y_val)) // (5) ); //no match operator[<unnamed>::x] return 0; }

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Re: [Boost-users] Strange issue with boost::date_time
by Neil Groves 15 Apr '09

15 Apr '09

On Tue, Apr 14, 2009 at 11:55 PM, Marshall Clow <marshall(a)idio.com> wrote: > At 3:20 PM -0700 4/14/09, Jared Lee Richardson wrote: > >> I'm going to try to remove even more code and narrow it down, and then >> I'll paste the offending code. Basically all I'm doing right now is >> initializing some time variables, then opening and reading from a >> file. It crashes on allocating 5 chars inside a function that reads >> from a file(or on allocating the class that contains a >> std::list<double> and a double). >> > > Um - do you have a bad pointer somewhere, or a buffer overflow? > When I see "Crashes while allocating", I think "heap corruption". > -- > -- Marshall > This is definitely my experience also. In fact if it is the only explanation for an access violation from a non-overloaded new operator that I am aware of. Hence I would be trying to find the perpetrator of the heap corruption. I suggest adding: #include <crtdbg.h> ... _CrtSetDbgFlag(_CRTDBG_CHECK_ALWAYS_DF); http://msdn.microsoft.com/en-us/library/5at7yxcs(VS.71).aspx This typically causes the offending code to be close to the region where the debugger stops. Often this finds the problem within minutes, however I have experienced problems with assertions attaching to the JIT debugger. Hence you may still be in trouble since you state that the debugger must be detached for the problem to occur. My hope is that the fault does occur with a debugger attached, but there are no obvious symptoms and that increasing the CRT checking will bring the problem to the fore. I hope this helps. Best wishes, Neil Groves

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bind: what am I doing wrong here?
by Noah Roberts 15 Apr '09

15 Apr '09

Simply want to grab the keys from a map and assign them to a vector: #include <iostream> #include <boost/bind.hpp> #include <map> #include <vector> #include <string> #include <algorithm> // some dumb object struct Test { int x; int y; Test(int a, int b) : x(a), y(b) {} Test() : x(), y() {}}; int main() { std::pair<std::string, Test> p = std::make_pair("Test", Test(1,2)); // works as I expect std::cout << boost::bind(&std::pair<std::string, Test>::first, _1)(p) << std::endl; std::map<std::string,Test> m; m["Test"] = Test(3,4); std::vector<std::string> keys(m.size()); // won't compile: std::transform(m.begin(), m.end(), keys.begin(), boost::bind(&std::pair<std::string,Test>::first, _1)); } It seems to barf on the transform call because of inability to call get_pointer on std::pair<>?? From what I understand of transform though it should be behaving more like the former call (output to stream) that compiles and works: *out_it = op(*in_it) - in fact a test function works. Why is it even attempting to call get_pointer()? Boost version is 1.37.0, compiler is MSVC 8.0 Error output follows: 1>e:\boostvs3\include\boost\mem_fn.hpp(333) : error C2784: 'T *boost::get_pointer(const std::auto_ptr<_Ty> &)' : could not deduce template argument for 'const std::auto_ptr<_Ty> &' from 'const std::pair<_Ty1,_Ty2>' 1> with 1> [ 1> _Ty1=const std::string, 1> _Ty2=Test 1> ] 1> e:\boostvs3\include\boost\get_pointer.hpp(21) : see declaration of 'boost::get_pointer' 1> e:\boostvs3\include\boost\mem_fn.hpp(352) : see reference to function template instantiation 'const R &boost::_mfi::dm<R,T>::call<const U>(U &,const void *) const' being compiled 1> with 1> [ 1> R=std::string, 1> T=std::pair<std::string,Test>, 1> U=std::pair<const std::string,Test> 1> ] 1> e:\boostvs3\include\boost\bind.hpp(222) : see reference to function template instantiation 'const R &boost::_mfi::dm<R,T>::operator ()<A1>(const U &) const' being compiled 1> with 1> [ 1> R=std::string, 1> T=std::pair<std::string,Test>, 1> A1=std::pair<const std::string,Test>, 1> U=std::pair<const std::string,Test> 1> ] 1> e:\boostvs3\include\boost\bind\bind_template.hpp(32) : see reference to function template instantiation 'R boost::_bi::list1<A1>::operator ()<const std::basic_string<_Elem,_Traits,_Ax>&,F,boost::_bi::list1<std::pair<_Ty1,_Ty2> &>>(boost::_bi::type<T>,F &,A &,long)' being compiled 1> with 1> [ 1> R=const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &, 1> A1=boost::arg<1>, 1> _Elem=char, 1> _Traits=std::char_traits<char>, 1> _Ax=std::allocator<char>, 1> F=boost::_mfi::dm<std::string,std::pair<std::string,Test>>, 1> _Ty1=const std::string, 1> _Ty2=Test, 1> T=const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &, 1> A=boost::_bi::list1<std::pair<const std::string,Test> &> 1> ] 1> c:\program files\microsoft visual studio 8\vc\include\algorithm(650) : see reference to function template instantiation 'const std::basic_string<_Elem,_Traits,_Ax> &boost::_bi::bind_t<R,F,L>::operator ()<std::pair<_Ty1,_Ty2>>(A1 &)' being compiled 1> with 1> [ 1> _Elem=char, 1> _Traits=std::char_traits<char>, 1> _Ax=std::allocator<char>, 1> R=const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &, 1> F=boost::_mfi::dm<std::string,std::pair<std::string,Test>>, 1> L=boost::_bi::list1<boost::arg<1>>, 1> _Ty1=const std::string, 1> _Ty2=Test, 1> A1=std::pair<const std::string,Test> 1> ] 1> c:\program files\microsoft visual studio 8\vc\include\algorithm(685) : see reference to function template instantiation '_OutIt std::_Transform<std::_Tree<_Traits>::iterator,_OutIt,_Fn1,std::_Iter_random_helper<_Cat1,_Cat2>::_Iter_random_cat>(_InIt,_InIt,_OutIt,_Fn1,_InOutItCat,std::_Range_checked_iterator_tag)' being compiled 1> with 1> [ 1> _OutIt=std::_Vector_iterator<std::string,std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char>>>>, 1> _Traits=std::_Tmap_traits<std::string,Test,std::less<std::string>,std::allocator<std::pair<const std::string,Test>>,false>, 1> _Fn1=boost::_bi::bind_t<const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &,boost::_mfi::dm<std::string,std::pair<std::string,Test>>,boost::_bi::list1<boost::arg<1>>>, 1> _Cat1=std::_Tree<std::_Tmap_traits<std::string,Test,std::less<std::string>,std::allocator<std::pair<const std::string,Test>>,false>>::iterator::iterator_category, 1> _Cat2=std::_Vector_iterator<std::string,std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char>>>>::iterator_category, 1> _InIt=std::_Tree<std::_Tmap_traits<std::string,Test,std::less<std::string>,std::allocator<std::pair<const std::string,Test>>,false>>::iterator, 1> _InOutItCat=std::_Iter_random_helper<std::_Tree<std::_Tmap_traits<std::string,Test,std::less<std::string>,std::allocator<std::pair<const std::string,Test>>,false>>::iterator::iterator_category,std::_Vector_iterator<std::string,std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char>>>>::iterator_category>::_Iter_random_cat 1> ] 1> e:\dev_workspace\experimental\scratch\scratch\main.cpp(21) : see reference to function template instantiation '_OutIt std::transform<std::_Tree<_Traits>::iterator,std::_Vector_iterator<_Ty,_Alloc>,boost::_bi::bind_t<R,F,L>>(_InIt,_InIt,_OutIt,_Fn1)' being compiled 1> with 1> [ 1> _OutIt=std::_Vector_iterator<std::string,std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char>>>>, 1> _Traits=std::_Tmap_traits<std::string,Test,std::less<std::string>,std::allocator<std::pair<const std::string,Test>>,false>, 1> _Ty=std::string, 1> _Alloc=std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char>>>, 1> R=const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &, 1> F=boost::_mfi::dm<std::string,std::pair<std::string,Test>>, 1> L=boost::_bi::list1<boost::arg<1>>, 1> _InIt=std::_Tree<std::_Tmap_traits<std::string,Test,std::less<std::string>,std::allocator<std::pair<const std::string,Test>>,false>>::iterator, 1> _Fn1=boost::_bi::bind_t<const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &,boost::_mfi::dm<std::string,std::pair<std::string,Test>>,boost::_bi::list1<boost::arg<1>>> 1> ] 1>e:\boostvs3\include\boost\mem_fn.hpp(333) : error C2784: 'T *boost::get_pointer(T *)' : could not deduce template argument for 'T *' from 'const std::pair<_Ty1,_Ty2>' 1> with 1> [ 1> _Ty1=const std::string, 1> _Ty2=Test 1> ] 1> e:\boostvs3\include\boost\get_pointer.hpp(14) : see declaration of 'boost::get_pointer'

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boost::archive::iterators::base64_from_binary
by Dmitry Timoshenko 15 Apr '09

15 Apr '09

Hello. I encountered a problem when tried to use base64_from_binary and binary_from_base64. * **typedef* vector<unsigned char> RawData_t; ** *typedef* base64_from_binary<transform_width<RawData_t::const_iterator, 6, 8> > to_base64_transformer; ** *typedef* transform_width<binary_from_base64<RawData_t::const_iterator>, 8, 6 > to_binary_transformer; RawData_t unicomm::files::base64encode(*const* RawData_t& src) { *return* RawData_t(to_base64_transformer(src.begin()), to_base64_transformer(src.end())); } The problem is in that source sequence should be multiple of 3. When I try to use sequence with different size I get assertion failure in std::vector class which tells: iterator is not dereferencable. It seems those dataflow iterators try to look for data after the input sequence end(). The problem is already discussed here: http://lists.boost.org/boost-users/2008/08/39790.php But, there is (above) no any valuable information about the problem. Is it bug or feature? How can I resove the problem? It is an abiltity to complete the input collection to make it multiple of 3 and on other side remove that dummy information added before. But, it is wanted that it would be more correctly resolved. Did anybody have any solution? Thank you.

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Iteratro List corruputed Boost::regex in VS2008
by Lee sophia 15 Apr '09

15 Apr '09

Hi, I'm new with Boost libraries. I was able to run the Boost:: regex in VS2005. However, when I converted the same project into VS2008. It always prompt with "Iterator List Corrupted" error at Xutility.cpp, when it reach the declaration of Boost::regex, for elg boost::regex Str(CONST_STR). It is calling the function/declaration from a c++ API dll. Does anyone meet this kind of problem? Is it the settings of the VS2008 incorrect? Thank you.

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How to obtain shared_ptr<Derived> from shared_ptr<Base>?
by Dominique Devienne 15 Apr '09

15 Apr '09

I have a class diagram with the following base classes: class Object; class Ident { ... private: ... friend class Object; void set_object(Object* obj) { object_ = obj; } private: ... Object* object_; }; class Object { ... public: Ident* ident() { return ident_.get(); } const Ident* ident() const { return ident_.get(); } shared_ptr<Ident> ident_ptr() { return ident_; } protected: Object(shared_ptr<Ident> ident) : ident_(ident) { ident_->set_object(this); } virtual ~Object() { ident_->set_object(0); } private: shared_ptr<Ident> ident_; }; An Object in memory always has an Ident, which it shares with client code, but the Ident of an Object can be loaded before the object itself, and will also remain after the Object is gone, as long as client code references it. Ident has a "back" pointer to its Object, which is maintained by Object directly via friendship. (yes, the design is tightly coupled). In effect Ident is almost like a "weak" proxy to its Object. Then there are derived class pairs from Ident+Object: class VehiculeIdent : public Ident { /* Vehicule-specific ident members */ } class Vehicule : public Object { protected: Vehicule() : Object(shared_ptr<VehiculeIdent>(new VehiculeIdent)) {} public: // covariant return type VehiculeIdent* ident() { return polymorphic_downcast<VehiculeIdent*>(Object::ident()); } const VehiculeIdent* ident() const { /* same as above */ } }; Vehicule is itself the base of a base hierarchy (Car, Bike, etc...), and I have other such "roots" (which all derive from Object). There's a manager class per root which composes a Boost.MultiIndex container specific to each root identity, which a simple interface like so: typedef multi_index_container< shared_ptr<VehiculeIdent>, indexed_by< ... > > > VehiculeIndex; class VehiculeMgr { public: ... bool bind_vehicule(Vehicule* v); void unbind_vehicule(Vehicule* v); private: VehiculeIndex index_; }; The problem I have is that I need a shared_ptr<VehiculeIdent> to insert to the B.MI index which I obtain from the Vehicule*, but given the API above I can only obtain a VehiculeIdent* or a shared_ptr<Ident>, both of which are inadequate to interact with the B.MI. I worked around this issue so far by changing VehiculeIdent like so: class VehiculeIdent : public Ident, public enable_shared_from_this<VehiculeIdent> { ... shared_ptr<VehiculeIdent> as_shared_ptr() { return shared_from_this(); } }; at which point I can now write for example: bool VehiculeMgr::bind_vehicule(Vehicule* v) { return index_.insert(v->ident()->as_shared_ptr()).second; } But this solution seems unsatisfactory to me, because it forces the derivation and additional as_shared_ptr member in the public API of all Ident-deriving "root ident" classes, which I only need it inside VehiculeMgr (whose B.MI index is private). So long story short, is there a clean way to obtain a shared_ptr<VehiculeIdent> from a shared_ptr<Ident> which one "knows" is a VehiculeIdent, to avoid my as_shared_ptr hack above? Thanks for any help, --DD PS: I'm happy to get advice on the design overall as well, separate from this main subject of this post.

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VC6 error_code.hpp compile errors
by Daniele Barzotti 15 Apr '09

15 Apr '09

Hi, I'm developing an ATL library to wrap another LIB with VC6. The includes comprehends: #include <boost/asio.hpp> #include <boost/asio/serial_port.hpp> #include <boost/thread.hpp> #include <boost/signals2/signal.hpp> #include <boost/scoped_ptr.hpp> #include <boost/enable_shared_from_this.hpp> When I compile I get these errors: --------------------------------------------------------------- g:\lib\boost_1_38_0\boost\system\error_code.hpp(45) : error C2252: 'value' : pure specifier can only be specified for functions g:\lib\boost_1_38_0\boost\system\error_code.hpp(45) : see reference to class template instantiation 'boost::system::is_error_code_enum<T>' being compiled g:\lib\boost_1_38_0\boost\system\error_code.hpp(48) : error C2252: 'value' : pure specifier can only be specified for functions g:\lib\boost_1_38_0\boost\system\error_code.hpp(48) : see reference to class template instantiation 'boost::system::is_error_condition_enum<T>' being compiled g:\lib\boost_1_38_0\boost\system\error_code.hpp(145) : error C2258: illegal pure syntax, must be '= 0' g:\lib\boost_1_38_0\boost\system\error_code.hpp(145) : error C2252: 'value' : pure specifier can only be specified for functions g:\lib\boost_1_38_0\boost\system\error_code.hpp(230) : error C2039: 'type' : is not a member of 'enable_if<struct boost::system::is_error_condition_enum<Cond>,void>' g:\lib\boost_1_38_0\boost\system\error_code.hpp(244) : error C2039: 'type' : is not a member of 'enable_if<struct boost::system::is_error_condition_enum<Cond>,class boost::system::error_condition>' g:\lib\boost_1_38_0\boost\system\error_code.hpp(297) : error C2784: 'struct boost::type &__thiscall boost::system::error_condition::operator =(ErrorConditionEnum)' : could not deduce template argument for 'struct boost::type &' from 'class boost::sy stem::error_condition &' g:\lib\boost_1_38_0\boost\system\error_code.hpp(297) : error C2785: 'struct boost::type &__thiscall boost::system::error_condition::operator =(ErrorConditionEnum)' and 'class boost::system::error_condition &__thiscall boost::system::error_condition: :operator =(const class boost::system::error_condition &)' have different return types g:\lib\boost_1_38_0\boost\system\error_code.hpp(245) : see declaration of '=' g:\lib\boost_1_38_0\boost\system\error_code.hpp(317) : error C2039: 'type' : is not a member of 'enable_if<struct boost::system::is_error_code_enum<Cond>,void>' g:\lib\boost_1_38_0\boost\system\error_code.hpp(330) : error C2039: 'type' : is not a member of 'enable_if<struct boost::system::is_error_code_enum<Cond>,class boost::system::error_code>' g:\lib\boost_1_38_0\boost\system\error_code.hpp(384) : error C2784: 'struct boost::type &__thiscall boost::system::error_code::operator =(ErrorCodeEnum)' : could not deduce template argument for 'struct boost::type &' from 'class boost::system::erro r_code &' g:\lib\boost_1_38_0\boost\system\error_code.hpp(384) : error C2785: 'struct boost::type &__thiscall boost::system::error_code::operator =(ErrorCodeEnum)' and 'class boost::system::error_code &__thiscall boost::system::error_code::operator =(const cl ass boost::system::error_code &)' have different return types g:\lib\boost_1_38_0\boost\system\error_code.hpp(331) : see declaration of '=' g:\lib\boost_1_38_0\boost\system\error_code.hpp(395) : error C2143: syntax error : missing ';' before '}' g:\lib\boost_1_38_0\boost\system\error_code.hpp(401) : error C2143: syntax error : missing ';' before '}' g:\lib\boost_1_38_0\boost\system\error_code.hpp(451) : fatal error C1903: unable to recover from previous error(s); stopping compilation --------------------------------------------------------------- Could someone give me some feedback? I need VC6 because its the only environment I can use to develop an ATL project! Thanks in advance! Daniele.

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How to use Boost Regex Partial Match
by Gundala Viswanath 15 Apr '09

15 Apr '09

Dear all, Given this code. I expect to get this output from the corresponding input: Input: FOO Output: Match Input: FOOBAR, Output: Match Input: BAR, Output: No Match But why it gives "No Match" for input FOOBAR? __BEGIN__ #include <iostream> #include <vector> #include <fstream> #include <sstream> #include <boost/regex.hpp> using namespace std; using namespace boost; int main ( int arg_count, char *arg_vec[] ) { if (arg_count !=2 ) { cerr << "expected one argument" << endl; return EXIT_FAILURE; } string InputString = arg_vec[1]; string toMatch = "FOO"; const regex e(toMatch); if (regex_match(InputString, e,match_partial)) { cout << "Match" << endl; } else { cout << "No Match" << endl; } return 0; }

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convert ptime to FILETIME?
by Hansi 15 Apr '09

15 Apr '09

Hi, I have searched now a lot in the documentation of ptime... Is there any function available which converts ptime to FILETIME? I can find only FILETIME to ptime.. Thanks Hansjörg

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Corrupted boost::regex::smatch results (on MSVS 2003)
by david.weber＠l-3com.com 15 Apr '09

15 Apr '09

All, I'm using Boost.Regex from v1.35.0. We're seeing the smatch matchresults object getting corrupted when being returned by value from a function. The smatch variable is good within the function (it is an object defined locally on the stack), but when returned it is corrupted with bad data. We're seeing this only in Visual Studio 2003, and no other platform. I'm still trying to figure out a workaround, but I do not have source access at the moment, to try and debug it that way. Just wondering if there are any known issues. A google search didn't return much by way of discussion of this sort of issue. Thanks --dw

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[Bind] how can a make the equivalent to the , operator
by Robert Ramey 15 Apr '09

15 Apr '09

I would like to compose two function objects into one. Bind describse this using || or && but my function objects return void. How can i package them into a new one that invokes both the components. Robert Ramey

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Unknown number of multitoken lists?
by David Doria 15 Apr '09

15 Apr '09

I want to do something like this: --NumLists 2 --List0 a.txt b.txt --List1 c.txt d.txt vector<vector<string> > Lists(2); po::options_description desc("Allowed options"); desc.add_options() ("help", "produce help message") ("List0", po::value<vector<string> >(&Lists[0])->multitoken(), "List0.") ("List1", po::value<vector<string> >(&Lists[1])->multitoken(), "List1.") ; But if I wanted to handle --NumLists 10, I would have to manually add List0, List1, ... List10 as parameters. That seems a bit silly, but maybe this is a very odd usage? Please let me know if you can think of a better way to handle this. Thanks, David

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Re: [Boost-users] Multiple Multitokens
by David Doria 15 Apr '09

15 Apr '09

Vladimir, it looks like only in the trunk, it didn't work with the distribution that came with Fedora 10. Also, when I compiled the trunk, I had to add using std::string; to boost/tools/wave/cpp.cpp for it to compile. Another question: When I link to boost_program_options-mt, cmake seems to truncate it to boost_program_options, so I had to add a symbolic link with that name. Does anyone else have that problem? Thanks, David > I would like to do: > --List0 a.txt b.txt --List1 c.txt d.txt > > Is that possible? > > Thanks, > > David >

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Boost::Asio No write handler called after async_write
by David Narvaez 15 Apr '09

15 Apr '09

Hi everyone, this (I think) is about boost::asio. Could somebody please tell me why in the following code my handle_write function is never called after the async_write? This tries to be an hybrid mixture of sync read and async write through a socket and even though the string gets written, no handler is called at the end. #include <boost/asio.hpp> #include <boost/thread.hpp> #include <boost/shared_ptr.hpp> #include <boost/enable_shared_from_this.hpp> #include <boost/bind.hpp> #include <iostream> #include <string> using boost::asio::ip::tcp; using namespace std; class Server : public boost::enable_shared_from_this<Server> { public: Server(); virtual ~Server(); void run(tcp::socket &); void handle_write(const boost::system::error_code &, size_t); }; Server::Server() { } Server::~Server() { } void Server::run(tcp::socket & sock) { string message("Hi!"); try { async_write(sock, boost::asio::buffer(message), boost::bind( &Server::handle_write, shared_from_this(), boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred)); } catch (exception& e) { cerr << e.what() << endl; } return; } void Server::handle_write(const boost::system::error_code & errc, size_t bytes) { cout << "Function called" << endl; return; } int main() { try { boost::asio::io_service ioserv; tcp::acceptor acceptor(ioserv, tcp::endpoint(tcp::v4(), 1337)); boost::shared_ptr<Server> newserver(new Server()); for (;;) { tcp::socket newsocket(ioserv); acceptor.accept(newsocket); cout << "Somebody arrived" << endl; newserver->run(newsocket); } } catch (exception& e) { cerr << e.what() << endl; } return 0; }

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[Multi-Index] Chained Ptr misunderstanding
by Dominique Devienne 14 Apr '09

14 Apr '09

Hi. I'm trying to use a shared_ptr as the value_type of a multi_index_container, but I'm not having any success with the key extractors (VS2005, 1.38). >From the doc, it seems that shared_ptr would be considered a Chained Pointer, and as such should work as-is, which by that I mean that I think I should be able to use the built-in key extractors whether value_type is a value or a shared_ptr. But I'm not having any luck. I found [1] which is very similar and which Joaquín answered, but I have other key extractors I want to use in different indexes, so I don't think using identity<> is applicable to my case in general, although it would be in this one. I'm trying to avoid having to write dumb custom key extractors for Foo, which would basically replicate what the built-in ones do in the first place. It's most likely an error an my part, but I can't spot it. Can someone please help? Thanks, --DD [1] http://www.nabble.com/-multiindex--custom-key-extractor-problem-td20839161.… #include <boost/multi_index_container.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/mem_fun.hpp> #include <boost/shared_ptr.hpp> using namespace boost; using namespace boost::multi_index; typedef unsigned Uid; static Uid make_uid() { static Uid counter__ = 101; return ++counter__; } class Foo { public: Foo() : uid_(make_uid()) {} const Uid& uid() const { return uid_; } private: Uid uid_; }; typedef multi_index_container< shared_ptr<Foo>, indexed_by< ordered_unique< BOOST_MULTI_INDEX_CONST_MEM_FUN( shared_ptr<Foo>, const Uid&, uid ) > > > FooIndex; int main() { FooIndex index; shared_ptr<Foo> p_foo(new Foo); BOOST_ASSERT(index.insert(p_foo).second); return 0; }

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[boost::bind] are volatile members still unsupported?
by Ovanes Markarian 14 Apr '09

14 Apr '09

Hi *, I found this thread from october 2004: http://lists.boost.org/boost-users/2004/10/8116.php Now I am running MSVC 9 (2008) and wonder if boost::bind still does not support volatile members? Many thanks, Ovanes

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Disabling Exception Handling
by Dykstra, Martin 14 Apr '09

14 Apr '09

Hi. Is there a way to disable the exception handling in the Boost libraries? Our project requires that we disable exceptions by using the -no-exceptions parameter when building (via gcc). Is this also a valid parameter to use when building the Boost libraries? Thanks. -Martin

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issues with unit tests on intel 32 bit, gcc 4.3, undefined reference to `__sync_fetch_and_add_4'
by Maróy Ákos 14 Apr '09

14 Apr '09

Hi, I'm having an issue to link a boost unit test application on a Linux box, which is 64 bit - but I want to create a 32 bit application. I saw the following bug report: https://svn.boost.org/trac/boost/ticket/2525 and applied to patches attached, but to no avail. I also tried the latest svn trunk of boost, but still no luck. I'm trying to compile & link the following simple sample app: #include <boost/test/unit_test.hpp> using namespace boost::unit_test; test_suite * init_unit_test_suite(int, char ** const) { test_suite *ts = BOOST_TEST_SUITE("test_suite"); framework::master_test_suite().add(ts); return 0; } I get the following results: $ make tests g++ -m32 -L/home/maroy/src/tyrell/src/darksweep/usr/lib -I/home/maroy/src/tyrell/src/darksweep/usr/include/boost-1_39 -o tests tests.cpp -lboost_test_exec_monitor-gcc43-mt-s -lboost_unit_test_framework-gcc43-mt-s /home/maroy/src/tyrell/src/darksweep/usr/lib/libboost_test_exec_monitor-gcc43-mt-s.a(framework.o): In function `boost::unit_test::framework::register_test_unit(boost::unit_test::test_suite*)': framework.cpp:(.text+0x4a4): undefined reference to `__sync_fetch_and_add_4' /home/maroy/src/tyrell/src/darksweep/usr/lib/libboost_test_exec_monitor-gcc43-mt-s.a(framework.o): In function `boost::unit_test::framework::register_test_unit(boost::unit_test::test_case*)': framework.cpp:(.text+0x648): undefined reference to `__sync_fetch_and_add_4' framework.cpp:(.text+0x713): undefined reference to `__sync_fetch_and_add_4' /home/maroy/src/tyrell/src/darksweep/usr/lib/libboost_test_exec_monitor-gcc43-mt-s.a(framework.o): In function `boost::unit_test::framework::get(unsigned long, boost::unit_test::test_unit_type)': framework.cpp:(.text+0x14fb): undefined reference to `__sync_fetch_and_add_4' /home/maroy/src/tyrell/src/darksweep/usr/lib/libboost_test_exec_monitor-gcc43-mt-s.a(framework.o): In function `boost::unit_test::framework::run(unsigned long, bool)': framework.cpp:(.text+0x3151): undefined reference to `__sync_fetch_and_add_4' /home/maroy/src/tyrell/src/darksweep/usr/lib/libboost_test_exec_monitor-gcc43-mt-s.a(framework.o):framework.cpp:(.text._ZN5boost9unit_test9framework11setup_errorC1ENS0_13basic_cstringIKcEE[boost::unit_test::framework::setup_error::setup_error(boost::unit_test::basic_cstring<char const>)]+0x5c): more undefined references to `__sync_fetch_and_add_4' follow collect2: ld returned 1 exit status make: *** [tests] Error 1 I compiled boost using the following command: bjam architecture=x86 address-model=32 link=static runtime-link=static --prefix=../../usr --includedir=../../usr/include --libdir=../../usr/lib install I have the following: $ g++ --version g++ (Ubuntu 4.3.2-1ubuntu12) 4.3.2 Copyright (C) 2008 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ uname -a Linux tomodachi 2.6.27-11-generic #1 SMP Wed Apr 1 20:53:41 UTC 2009 x86_64 GNU/Linux (basically Ubuntu 8.10 64 bit) am I doing something wrong?

2 4

multiple multitokens program_options
by David Doria 14 Apr '09

14 Apr '09

I would like to do: --List0 a.txt b.txt --List1 c.txt d.txt Is that possible? Thanks, David

2 2

[parameter][mpl] Help with interface for a mixed integer interpolator
by Jesse Perla 14 Apr '09

14 Apr '09

Hi there,I am writing an interpolator for multidimensional data that may be mixed integer and wanted some design advice. The user will know at compile-time what the number of integer and real dimensions is. The user will create a regular grid as the cartesian product of the various vectors of values for each dimension. mixed_grid<3, 2> my_mixed_grid; linear_interpolator<3, 2> f( my_mixed_grid); //3 real dimensions, 2 integer dimensions The problem with the interpolator is that it needs to be used in a variety of ways. Sometimes the user knows the exact number of the integer or real along a particular dimension. Other times they know the exact index in the grid for a dimension (I am using this for my dynamic programming library, so things get a little crazy when the code is generic, and speed is essential since the interpolator is executed in the innermost loop and would be the main bottleneck if done wrong). Ideal semantics: - Would love the ability to specify the type of interpolation for each variable. interpolated as the default, exact, and by index. Exact would tell the interpolator implementation to find the exact value and to skip a dimension in the interpolation. Byindex would tell it to do the same but even skip the lookup in the list for that dimension. - I want it to be relatively easy to call it with the default "interpolated" type. - Having parameters out of order is not necessary, but if the solution is to use boost::parameter or something like that, then I would say that we might as well allow it. Assuming that there is some sort of decoration class, I would love the semantics of the interpolator to allow something like this: linear_interpolator<3, 2> f( my_mixed_grid); cout << f(1.2, 3.4, 2.2, 1, 5); //normal. always ordered so integers at end. cout << f(1.2, exact(3.4), 2.2, 1, 5); //normal cout << f(1.2, exact(3.4), 2.2, 1, 5); //normal cout << f(1.2, exact(3.4), 2.2, byindex(0), 5); etc. It is reasonable to have the type for the non-interpolated defaults. e.g. cout << f(1.2, exact<real>(3.4), 2.2, byindex<int>(0), 5); Although having a class that wraps the creation could be fine if the decoration needs template parameters cout << f(1.2, get_exact(3.4), 2.2, get_by_index(0), 5); Any idea on how to implement this or if this is the right approach? Should I be using boost parameter somehow to make life easier and not have to implement a huge number of overloaded operator()? I can't figure out what the decoration classes would look like, and I can't have this using a virtual function to extract a value. And if boost::parameter is the solution: As gravy, it would be great if the user could positionally setup a bunch of boost parameter tags for their specific function (it is reasonable to expect them to put them in a namespace to avoid clashes). i.e. support f(_1 = 1.2, _3 = exact(2.2), _2 = 2.2, etc.); but also to define some kind of macro that can be used by any : FUNCTION_PARAMETER( _x, _1); //_x synonym for _1 used in the unpacking of the argpack FUNCTION_PARAMETER( _y, _2); //etc. so that they can call it like: f(_x = 1.2, _y = exact(2.2), etc.); I can't figure out in boost::parameter how I could have _x as a synonym for _1 which the interpolator implementation would use to unpack the argpack. Thanks Jesse

1 0

boost::system::error_code::swap proposal
by Marat Abrarov 14 Apr '09

14 Apr '09

Why boost::system::error_code doesn't have swap method (or overloaded swap friend function)? boost::system::error_code is copyable so it must have such "swap". Any opinions? Best regards, Marat Abrarov.

2 1

Boost thread conflicts with MFC
by Igor MI 14 Apr '09

14 Apr '09

I updated from 1.35 to 1.38 when the conflicts started. My MFC application wouldn't start, it would throw an exception. I pinned down the problem to the hook that boost thread library is using which is located in tss_pe.cpp: extern "C" { extern BOOL (WINAPI * const _pRawDllMain)(HANDLE, DWORD, LPVOID)=&dll_callback; } What I did is comment this declaration and rebuild the library and now my application seems to be running normally. My question is can boost thread library run properly without this hook? If not, what other solution do you suggest. Thanks, Igor. -- View this message in context: http://www.nabble.com/Boost-thread-conflicts-with-MFC-tp22946168p22946168.h… Sent from the Boost - Users mailing list archive at Nabble.com.

18 35

How to open parallel port
by master master 14 Apr '09

14 Apr '09

Is there any library exist for opening parallel ports? I know for serial it is "serial_port". I worked with it and it is working fine. For parallel communication; which class(library) is needed. -Rahul Add more friends to your messenger and enjoy! Go to http://messenger.yahoo.com/invite/

2 1

mpi
by Sean Farrow 14 Apr '09

14 Apr '09

Hi: How can I enable boost::mpi? I've tried adding # using mpi; to user-config.jam. This still tells me that mpi is disabled. What mpi options have Igot on win32 systems. Regards Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 4005 (20090413) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

2 1