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[Proto] Failure on VC9
by Joel Falcou 19 Feb '09

19 Feb '09

I've been tryign to port some of my proto code to VC9 but it seems I failed. The code compiles fine but when I try to use any of my newly defined operator on my terminal, VC9 complains it cna't find them. What can be the reason of this symptoms as the same code works on both gcc and icc ?

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if_then_else_return (boost::lambda) question
by Jonathan Leonard 19 Feb '09

19 Feb '09

Greetings! I'm fairly new to boost and have a little problem with if_then_else_return. Can anyone tell me the problem with the following short program? [It seems that my 'thenBranch' and 'elseBranch' functions are never called and if_then_else_return' always returns true (as if the 'then' branch were called)]. Many thanks in advance for any help you may offer! P.S. (A more general C++ q: A little improvement I'd like to make is to drop the ITERATORTYPE type argument from IfNotEndThenElseReturn and use CONTAINERTYPE::iterator instead, but the compiler won't allow that. Anyone know why?). Thanks again! ============================================ #include <boost/lambda/lambda.hpp> #include <boost/lambda/if.hpp> #include <boost/lambda/bind.hpp> #include <boost/function.hpp> #include <functional> #include <list> using namespace boost::lambda; template<typename RET> RET InvokeReturn(boost::function<void ()> f, const RET& retVal) { printf("in InvokeReturn!\n"); f(); return retVal; } bool InvokeReturnTrue(boost::function<void ()> f) { return InvokeReturn(f, true); } bool InvokeReturnFalse(boost::function<void ()> f) { return InvokeReturn(f, false); } boost::function<bool ()> MakeReturnTrue(boost::function<void ()> f) { printf("in MakeReturnTrue!\n"); return boost::lambda::bind(&InvokeReturnTrue, f); } boost::function<bool ()> MakeReturnFalse(boost::function<void ()> f) { printf("in MakeReturnFalse!\n"); return boost::lambda::bind(&InvokeReturnFalse, f); } template<typename CONTAINERTYPE, typename ITERATORTYPE> bool IfNotEndThenElseReturn(const ITERATORTYPE& it, CONTAINERTYPE& container, boost::function<void ()> thenBranch, boost::function<void ()> elseBranch) { printf("in IfNotEndThenElseReturn!\n"); std::not_equal_to<ITERATORTYPE> ne; return boost::lambda::if_then_else_return( boost::lambda::bind(&std::not_equal_to<ITERATORTYPE>::operator(), ne, it, container.end()), MakeReturnTrue(thenBranch), MakeReturnFalse(elseBranch))(); } void thenBranch() { printf("in then branch!\n"); } void elseBranch() { printf("in else branch!\n"); } int _tmain(int argc, _TCHAR* argv[]) { printf("beginning execution!\n"); std::list<int> l; l.push_back(8); l.push_back(7); l.push_back(6); l.push_back(5); std::list<int>::iterator it = l.end(); std::list<int>::iterator it2 = l.begin(); bool b = IfNotEndThenElseReturn(it, l, bind(&thenBranch), bind(&elseBranch)); printf("b is %s\n", b ? "true" : "false"); bool b = IfNotEndThenElseReturn(it2, l, bind(&thenBranch), bind(&elseBranch)); printf("b is %s\n", b ? "true" : "false"); printf("finished!\n"); return 0; }

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Order of composite units in the output
by Esben Mose Hansen 19 Feb '09

19 Feb '09

Hi, I think I am beginning to get the boost:units library, but I still have one problem. Consider: #include <iostream> #include <boost/units/io.hpp> #include <boost/units/systems/si/length.hpp> #include <boost/units/make_system.hpp> #include <boost/units/quantity.hpp> #include <boost/units/base_dimension.hpp> #include <boost/units/base_unit.hpp> #include <boost/units/derived_dimension.hpp> // Introduce slot (measured in e.g. ffe or tfe) as a basic dimension, unit and in a system struct slot_base_dimension : boost::units::base_dimension<slot_base_dimension, 1> { }; typedef slot_base_dimension::dimension_type slot_dimension; struct ffe_base_unit : public boost::units::base_unit<ffe_base_unit, slot_dimension, 1> { static std::string name() { return("40ft equivalent"); } static std::string symbol() { return("ffe"); } }; typedef ffe_base_unit::unit_type slot_t; BOOST_UNITS_STATIC_CONSTANT(ffe, slot_t); /// derived dimension (slot) flow typedef boost::units::derived_dimension<slot_base_dimension,1,boost::units::time_base_dimension,-1>::type flow_dimension; /// placeholder class defining si unit system typedef boost::units::make_system<boost::units::si::meter_base_unit, boost::units::si::second_base_unit, ffe_base_unit>::type unit_system; typedef boost::units::unit<flow_dimension,unit_system> flow_t; BOOST_UNITS_STATIC_CONSTANT(ffe_per_second, flow_t); int main() { boost::units::quantity<flow_t> flow(4*ffe_per_second); std::cout << "flow= " << flow << std::endl; } This program outputs flow= 4 s^-1 ffe which is correct, but a bit unusual... 4 ffe/s or even 4 ffe s^-1 would have been better. Is this possible? Thanks! -- kind regards, Esben

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[serialization|TR1] serialization impementation for std::tr1::tuple?
by Markus Werle 19 Feb '09

19 Feb '09

Hi! Sorry, if this has been discussed before. I am too stupid (and tired) to find the equivalent for tuple_io.hpp for the boost tr1::tuple implementation. So is there already some serialization and/or I/O implementation for a tr1::tuple available somewhere? The proposal at http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2002/n1403.pdf mentions operator<<, but VC9 SP1 refuses to find one if I #include <boost/tr1/tuple.hpp> or <tuple>. Is this another VC9 bug? I could not find the compiler flag which hinders M$'s implementation of TR1 ... Any pointer appreciated. best regards, Markus

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[optional] operator <<
by Igor R 19 Feb '09

19 Feb '09

Hello, I've just noticed that the following code might be missleading: boost::optional<int> opt; opt = 0; std::cout << opt; If boost/optional/optional_io.hpp is not included, the above code outputs "1" - because boost::optional is implicitly convertible to bool. Maybe it's worth either including boost/optional/optional_io.hpp in boost/optional.hpp or making some trick to generate compiler error if operator <<() used and optional_io.hpp is not included?

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[Python] can't import boost modules in an embedded interpreter
by George Slavov 19 Feb '09

19 Feb '09

I am trying to create an executable which will start a python interpreter, import a module written in python, called entry.py, run its run() method and then quit. I have this part done, although I use only the C API. Now I define a boost python module like so struct World { void set(std::string msg) { this->msg = msg; } std::string greet() { return msg; } std::string msg; }; BOOST_PYTHON_MODULE(hello) { class_<World>("World") .def("greet", &World::greet) .def("set", &World::set) ; } In my entry.py I have the simple code import hello def run(): planet = hello.World() planet.set("howdy") print planet.greet() When I run my executable, it tells me that World is undefined in the entry module. However, if in C++ I use code like this PyRun_SimpleString("import hello"); PyRun_SimpleString("planet = hello.World()"); PyRun_SimpleString("planet.set('howdy')"); PyRun_SimpleString("print planet.greet()"); It works! What am I doing wrong? I am attaching my (very short) code. Be advised that I am using the funky platform of Windows XP, cygwin and GCC 3.4, boost 1.33.1. That might be the problem, but I have no other platform to try this on easily. What am I missing here? Best, George

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wchar_t and boost::asio
by Cain Miley 19 Feb '09

19 Feb '09

Okay, i sorted out that you can't use boost::asio::basic_streambuf with wide chars, but if not that, how do I send wide chars with asio? Is it even possible? Thanks.

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[boost::filesystem] How to determine access mode?
by Dmitry V. Krivenok 19 Feb '09

19 Feb '09

Hello! Is there a way to determine access mode for arbitrary file using boost::filesystem? I searched through the documentation and source code, but didn't find such functions in boost::filesystem. I'm looking for simple functions like: bool is_readable(const std::string& path) bool is_writable(const std::string& path) bool is_executable(const std::string& path) I also want to determine OS-dependent access rights flags (such as setuid and setgid in Unix). Is it possible with boost::filesystem? I don't want to use low-level stat() function and check for S_ISUID and S_ISGID. Thank you beforehand! -- Sincerely yours, Dmitry V. Krivenok Orange System Co., Ltd. Saint-Petersburg, Russia work phone: +7 812 332-32-40 cellular phone: +7 921 576-70-91 e-mail: krivenok(a)orangesystem.ru web: http://www.orangesystem.ru skype: krivenok_dmitry jabber: krivenok_dmitry(a)jabber.ru icq: 242-526-443

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Re: [Boost-users] extraction invariants from intensive-loop based on template parameters
by Hicham Mouline 19 Feb '09

19 Feb '09

> ----- Original Message ----- > From: "Matthieu Brucher" <matthieu.brucher(a)gmail.com> > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] extraction invariants from intensive-loop based on template parameters > Date: Thu, 19 Feb 2009 14:17:20 +0100 > > > Hi, > > The compiler is smart enough to prune an if condition if it knows that > the value is always false. > So if you add an if(!Lower::IsConstant) before and after your loop, > you don't have to rewrite it. > > Matthieu > > 2009/2/19 Hicham Mouline <hicham(a)mouline.org>: > > Hello, > > > > I have an algorithm like: > > > > template <typename Upper, typename Lower> > > class X { > > > > static void f() > > { > > .... > > for (size_t n=0; n<=N; ++n) > > { > > // process for j=0 at every n if Lower::IsConstant is false > > for (size_t j=1; j<=J-1; ++j) > > { > > } > > // process for j=J at every n if Upper::IsConstant is false > > } > > .... > > } > > > > > > So I extracted the double for loop in a separate wrapper class and > > I verbosely wrote 4 specializations with template args begin bool : > > > > <true, true> > > <false, true> > > <true, false> > > <false, false> > > > > for e.g. for <true, true> > > > > // process for j=0 once > > for (size_t n=0; n<=N; ++n) > > { > > for (size_t j=1; j<=J-1; ++j) > > { > > } > > } > > // process for j=J once > > > > > > Any advice? > > Is there a better way than writing explicitly the tmpl specializations? > > Boost.PP maybe? > > > > rds, > > _______________________________________________ I've just measured with VS2005, g++4.0 and intel11. At least these 3 compilers are smart enough. Thanks,

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[filesystem] how to get symlink info?
by jeti 19 Feb '09

19 Feb '09

hi all im not sure if i just dont find the solution in the docs/list or its not supported in boost::filesystem which means using system functions given is a symlink like this '/tmp/subdir/thisisasymlink' which points to '/some/where/some/file/or/directory' what i need is: 1. the absolute path the symlink is pointing too, which is '/some/where/some/file/or/directory' 2. get the absolute path for something like '/tmp/../some/where/some/file/or/directory' which resolvs to '/some/where/some/file/or/directory' 3. if the absolute path is a subdirectory of some other directory in this example: if '/some/where/some/file/or/directory' is a subdirectory of '/tmp/subdir' which obviously isnt thx in advance

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extraction invariants from intensive-loop based on template parameters
by Hicham Mouline 19 Feb '09

19 Feb '09

Hello, I have an algorithm like: template <typename Upper, typename Lower> class X { static void f() { .... for (size_t n=0; n<=N; ++n) { // process for j=0 at every n if Lower::IsConstant is false for (size_t j=1; j<=J-1; ++j) { } // process for j=J at every n if Upper::IsConstant is false } .... } So I extracted the double for loop in a separate wrapper class and I verbosely wrote 4 specializations with template args begin bool : <true, true> <false, true> <true, false> <false, false> for e.g. for <true, true> // process for j=0 once for (size_t n=0; n<=N; ++n) { for (size_t j=1; j<=J-1; ++j) { } } // process for j=J once Any advice? Is there a better way than writing explicitly the tmpl specializations? Boost.PP maybe? rds,

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compiling 32 bit boost libraries on a 64 bit system? (gcc, Linux)
by Ákos Maróy 19 Feb '09

19 Feb '09

Hi, I'm trying to compile boost into 32 bit libraries on a 64 bit Linux box. with gcc, with would simply mean to add the flag -m32 to gcc. but I can't seem to make bjam do this. I've tried a number of approaches: - export and set the environment variables CFLAGS, CXXFLAGS and LDFLAGS to -m32 - set the following in tools/build/v2/user-config.jam: cflags=-m32 cxxflags=-m32 linkflags=-m32 - set the following in tools/build/v2/user-config.jam: using gcc : 4.1.2 : g++-4.1.2 : -m32 ; (based on the documentation found at http://beta.boost.org/doc/tools/build/doc/html/bbv2/reference/tools.html#bb… ) but to no avail - the -m32 flag is not honored, and the compiled boost libraries are 64 bit :( what am I doing wrong? Akos

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A need for a complex pool type container
by Robert Dailey 19 Feb '09

19 Feb '09

My requirements are a bit complex and involved, but I'll try to be as brief as possible. We have this "scheduler" type system where for each unit of time (think of 1 unit as 1 ms) there is a "bucket" of events that shall be processed. This is relative. Suppose the current time is 103. We will have a record of events to be processed at time 103, 104, 105, ..., 203. When all of the events in the "bucket" for time stamp 103 are processed, we "pop_front" to remove the bucket for 103. Everything is essentially shifted forward. Hopefully this does not require physically shifting everything forward, and simply is just a matter of using a lesser index to access the same element later on. I insert new events into existing buckets anywhere in the container, it does not necessarily have to be from the back. I always remove items from the front since they are processed linearly. One can kind of think of this as a std::deque< std::vector<> >, but the containing deque would need to be given a fixed size of 100 (as in the example above). The tricky part is shifting all of the "buckets" (the buckets in this case would be the inner-vector objects) forward when something from the front is removed. The key here is that I do not want to call pop_front() each time a bucket is processed because I want to avoid constant new/delete operations since insertion and removal will be happening quite frequently. I'm not sure what the best approach to solving this problem is. I'm hoping someone in the community will be able to suggest a way in which boost can easily solve this problem. Thanks to everyone for taking the time to read this.

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[serialization] problem exporting derived classes
by Jens Weggemann 19 Feb '09

19 Feb '09

Hello, I've been trying out boost::serialization and ran into a problem trying to serialize objects of derived classes. I set up this simple class hierarchy: class BaseNode { std::vector<BaseNode*> children_; ... friend class boost::serialization::access; template<class Archive> void serialize(Archive &ar, unsigned version) { ar & children_; } }; class DerivedNode : public BaseNode { ... friend class boost::serialization::access; template<class Archive> void serialize(Archive &ar, unsigned version) { ar & boost::serialization::base_object<BaseNode>(*this); } }; All works fine as long as I register the types with the archives: arch.register_type(static_cast<BaseNode*>(NULL)); arch.register_type(static_cast<DerivedNode*>(NULL)); Now the documentation suggests exporting the classes as an alternative to that. But when I instead put BOOST_CLASS_EXPORT(BaseNode) BOOST_CLASS_EXPORT(DerivedNode) the polymorphism is not handled correctly and e.g. a tree of 3 DerivedNodes is restored as a single BaseNode object. What am I missing here? The full code for this test is at http://noonti.de/tree_serialization.cpp.txt Thanks, Jens

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Graph lib: read_dimacs_max_flow segment fault
by Xian Chen 18 Feb '09

18 Feb '09

Hi All, I compile read_dimacs_max_flow example ( http://www.boost.org/doc/libs/1_38_0/libs/graph/example/read_write_dimacs-e…) with these warnnings. g++ -I/home/xianchen/opt/include/boost-1_38 -Wno-deprecated -c read.cpp -o objects/simu.o /home/xianchen/opt/include/boost-1_38/boost/graph/read_dimacs.hpp: In function 'int boost::read_dimacs_max_flow(Graph&, CapacityMap, ReverseEdgeMap, typename boost::graph_traits<G>::vertex_descriptor&, typename boost::graph_traits<G>::vertex_descriptor&, std::istream&) [with Graph = main()::Graph, CapacityMap = boost::adj_list_edge_property_map<boost::directed_tag, long int, long int&, unsigned int, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::directed_tag, unsigned int>, boost::no_property> >, boost::edge_capacity_t>, ReverseEdgeMap = boost::adj_list_edge_property_map<boost::directed_tag, boost::detail::edge_desc_impl<boost::directed_tag, unsigned int>, boost::detail::edge_desc_impl<boost::directed_tag, unsigned int>&, unsigned int, boost::property<boost::edge_capacity_t, long int, boost::property<boost::edge_reverse_t, boost::detail::edge_desc_impl<boost::directed_tag, unsigned int>, boost::no_property> >, boost::edge_reverse_t>]': read.cpp:86: instantiated from here /home/xianchen/opt/include/boost-1_38/boost/graph/read_dimacs.hpp:108: warning: deprecated conversion from string constant to 'char*' /home/xianchen/opt/include/boost-1_38/boost/graph/read_dimacs.hpp:108: warning: deprecated conversion from string constant to 'char*' ...... My GCC is: Using built-in specs. Target: i686-pc-linux-gnu Configured with: ../gcc-4.2.4/configure --prefix=/home/xianchen/opt --enable-shared --enable-threads=posix --enable-languages=c,c++ --enable-checking=release --enable-mpfr=/home/xianchen/opt/ --with-system-zlib Thread model: posix gcc version 4.2.4 I run this program using data "boost/libs/graph/example/max_flow.dat" But get segment fault: *** glibc detected *** free(): invalid pointer: 0x08053ff4 *** Aborted Can any one tell me the why this happen? The program aborts under GCC.4.3.3 either. Which version of GCC is the most boost friendly? Thanks in advance, Xian

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[serialization] export.hpp changes from 1.37 to 1.38
by Chard 18 Feb '09

18 Feb '09

The BOOST_CLASS_EXPORT.. macros have been moved into a detail namespace (1.38) from a (public) anonymous namespace (1.37). I'm guessing that the reasoning for this was in order to avoid many definitions of the class singletons. However, this appears to have enforced that all of the guids (for all archive types) now have to reside in a single compilation unit. The attached code illustrates the limitation; this compiles under 1.37 but results in duplicate symbol definitions in 1.38 (with MSVC7.1). It worked with 1.37 because the anonymous namespace ensured no symbol clashes, but now the symbols are all in the same namespace. The example shows a case where two archive types (xml and binary) might be in use. The obvious solution to this (simple) case would be to just use a single compilation unit, which brings in the guids for both binary and xml. However, turning a blind eye to the 'untidiness', this fix does not help with the project we're working on. In our project, there is not just a simple type being serialized; there are a lot more classes and a bit of mpl thrown in. This actually resulted in breaching the COFF symbol limit (approx. 65k) with MSVC7.1, so we were forced to split the serialization. In fact, we had to split both the save and load parts of the binary serialization. Our current workaround is to use the archive.register_type<...> method, and ignore the export macros, but this does mean ensuring all types are covered (as described in the documentation).

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Boost and Real Time
by Brian Wrenn 18 Feb '09

18 Feb '09

Hi, I'm an experienced C++ programmer, but very new to Boost. I'm looking into making use of it for my next project, which will run on LynxOS, a real time system. Does anyone have any experience, knowledge of pitfalls, or words of wisdom to share about building and running with Boost, or more likely a subset of Boost's libraries, for a real time system? Thanks for any help. -Brian

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[asio] io_service use in dll leads to service_registry crash
by joshr 18 Feb '09

18 Feb '09

Configuration: 1) Boost 1.37 2) Visual Studio 2008 3) Windows executable using boost's multi-threaded static library, using a static linked multi-threaded run time. 4) A dll I have as part of the project is compiled with the same settings. 5) MFC is not used. The executable creates an io_service (io) and pool of worker threads, each calling io.run(). Afterwards, the executable begins loading DLLs I've written to add specific functionality (i.e plugins). Each of these plugins are passed the executable's io_service so that they can perform asynchronous work against the thread pool. One of the DLLs creates a boost::asio::ip::tcp::acceptor object, passing the io_service to its constructor. This, in turn, eventually calls use_service, which creates a new service and associates it with the service_registry. This is all happening in the DLL. At shut down, I begin unloading the DLLs, giving each a chance to shut down everything (which they do). I then call FreeLibrary() on the DLL's HMODULE handle. After my application completes shutdown, all the destructors hit, as expected. When the destructor of the service_registry hits, I believe its linked list of services is still pointing to a service located in the memory space of the DLL. This results in a crash. I believe this is the case as I can track the pointer to the acceptor_service in a Watch Window. The pointers and the object remain valid until I call "FreeLibrary", at which point they become worthless. I think this is because the DLL and the executable have their own CRT memory space, due to the way I'm linking in the CRT. The service for the acceptor is being created in the DLL's space. When FreeLibrary is called, this space is released to the OS, making the pointer to the object worthless. If that's the case, I believe I'll need to supply my own service creation routine for the DLLs so that the services are created in my executable's memory space. Is this possible? Is there a way to get the service_registry to release a service when it's no longer in use anywhere, or to specify my own new/delete routines the use_service calls should use? Or, is using ASIO in a DLL like this a really really bad idea? If that's the case, how can I tell what other objects in boost could cause these sorts of problems? I'll try to get a project together that reproduces the issue as soon as I can. I can't use the code I have at the moment as it is proprietary. Thanks for any input anyone can provide. -- View this message in context: http://www.nabble.com/-asio--io_service-use-in-dll-leads-to-service_registr… Sent from the Boost - Users mailing list archive at Nabble.com.

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[ASIO] Newbie; How can I access remote_endpoint data in an SSL server
by May James 18 Feb '09

18 Feb '09

Can anybody help a boost::newbie I have generated an ASIO SSL server based on the sample code "server.cpp" How can I determine the Client Address from the ssl_socket which is defined as typedef boost::asio::ssl::stream<boost::asio::ip::tcp::socket> ssl_socket; relevant code is: acceptor_.async_accept(new_session->socket(), boost::bind(&server::handle_accept, this, new_session, boost::asio::placeholders::error)); Thank You

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[assign] Nested initialization of std containers
by Joseph Lisee 18 Feb '09

18 Feb '09

I am trying to use list_of and map_list_of to initialize a std::vector containing std::maps. I am using Boost 1.37 and Mac OS X 10.4 with Apple's G++ 4.0.1. Here is a complete example: #include <vector> #include <map> #include <string> #include <boost/assign/list_of.hpp> using namespace boost::assign; typedef std::map<int, std::string> dict; typedef std::vector<dict> list; int main() { // Works dict d = map_list_of(1,"B")(2,"A"); list l1 = list_of(d); // Does not compile list l2 = list_of(map_list_of(1,"B")(2,"A")); return 0; } Is there some way to get this to work?

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No packets received with boost::asio::ip::udp::socket set to multicast group
by Lennyk 18 Feb '09

18 Feb '09

Hi, I'm using boost 1.35 on a Linux machine. I've written an application which creates a boost::asio::ip::udp::socket, then binds to a certain local address & port - and finally I've created an option to join a boost::asio::ip::multicast::join_group. All seems well, and I see the registration request through a network sniffer. BUT, when I try to receive packets after successfully joining the udp multicast group - I get NOTHING! Needless to say, I see tons of packets streaming through with the sniffer. What am I doing WRONG? Here's my code (just a test application): using namespace std; using namespace boost::asio; int main(int argc, char *argv[]) { if (argc != 4) { // Test for correct number of parameters cerr << "Usage: " << argv[0] << " <Local Address> <Multicast Address> <Port>" << endl; exit(1); } io_service m_io_service; ip::udp::socket m_socket(m_io_service); ip::address localAddress(ip::address_v4::from_string(argv[1])); ip::address multicastAddress(ip::address_v4::from_string(argv[2])); unsigned short port = atoi(argv[3]); // Second arg: port boost::system::error_code error; m_socket.open(ip::udp::v4()); m_socket.bind(ip::udp::endpoint(localAddress, port), error); if (error) { cout << "bind error!" << endl; exit(1); } ip::multicast::join_group option(multicastAddress.to_v4(), localAddress.to_v4()); m_socket.set_option(option); vector<unsigned char> m_receiveBuffer; mutable_buffers_1 buf = buffer((void*)&m_receiveBuffer[0], 1024); int size = (int)m_socket.receive(buf, 0, error); if (error) { cout << "recv error!" << endl; exit(1); } return 0; } Thanks! Lenny.

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Setting thread affinity on Linux using boost::thread
by Lennyk 18 Feb '09

18 Feb '09

Hi, I'm running on Linux and I would like to set a specific thread affinity to each thread I create (i.e. setting each thread to run on a different core/CPU). How can this be done using the boost::thread library? Thanks! Lenny.

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Do the Range Adaptors really depend upon the RegEx static lib?
by Nate Foreman 18 Feb '09

18 Feb '09

Hello, I'm using the range adaptors from the latest version of the range library in the vault. Namely: boost::adaptors::filtered boost::adaptors::transformed The Visual Studio linker was kind enough to inform me that these depend upon the regex static library (libboost_regex-vc80-mt-sgd-1_38.lib). Does anybody know why? I'd rather not build the boost regex lib. Is there any way to avoid this dependency?

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[program options] access violation with _SECURE_SCL turned off
by klaus triendl 18 Feb '09

18 Feb '09

Hi, I'm using the boost 1.36 program options library on windows with msvc++2008, statically linked to my applications. In "debug mode" everything works fine, however, in "release mode" I encounter an access violation when parsing the c++ commandline passed to main() or when parsing the windows commandline with split_winmain(). Note that this happens only if and only if the preprocessor macro _SECURE_SCL gets turned off (_SECURE_SCL=0). scenario 1) Parsing the main() options, even the simple example from the tutorial, section "getting started", terminates with an access violation when calling po::store() without a usable stack trace; scenario 2) A simple call to po::split_winmain(L"\"--test\"") produces a crash. Note the use of a wide character string. The stack trace: boost::program_options::detail::utf8_codecvt_facet::do_in() boost::detail::convert<wchar_t,char,boost::_bi::bind_t<int,boost::_mfi::cmf7<int,std::codecvt<wchar_t,char,int>,int &,char const *,char const *,char const * &,wchar_t *,wchar_t *,wchar_t * &>,boost::_bi::list8<boost::_bi::value<std::codecvt<wchar_t,char,int> const *>,boost::arg<1>,boost::arg<2>,boost::arg<3>,boost::arg<4>,boost::arg<5>,boost::arg<6>,boost::arg<7> > > >() boost::from_8_bit() boost::from_utf8() boost::program_options::split_winmain() wmain(int argc=3407872, wchar_t * * argv=0x00000000) Did somebody encounter this issue? Any solutions? Thanks, Klaus Triendl

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boost::asio::streambuf and wide chars
by Cain Miley 18 Feb '09

18 Feb '09

Hi, currently i have: boost::asio::streambuf request; std::ostream requestStream(&request); requestStream << "hello world"; if i change 'std::ostream' to 'std::wostream' (because streambuf uses char's i assume?) i get an error, how would i do this with wide chars? (sorry if that didn't make much sense)

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