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compiling with an actual compiler (gcc 4.3)
by Peter Pein 16 Mar '08

16 Mar '08

Dear group, I did a search for "4.3" and did not get a result. If the following question has been asked before, please forgive me and point me to the correct thread. I had problems compiling gnash-0.8.2. using Fedora 8 and gcc 4.3. The error message has been: g++-4.3 -DHAVE_CONFIG_H -I. -I.. -DPLUGINSDIR=\"/usr/lib/gnash/plugins\" -I.. -I. -I.. -I../libamf -I../server -I../server/swf -pthread -I/usr/include/libxml2 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -pthread -I/usr/include/gstreamer-0.10 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/libxml2 -I/usr/include -I../libltdl -O3 -m64 -mfpmath=sse -mtune=athlon64 -msse2 -mmmx -m3dnow -fexpensive-optimizations -fgcse -ffast-math -pthread -pthread -W -Wall -Wcast-align -Wcast-qual -Wpointer-arith -Wreturn-type -fvisibility-inlines-hidden -MT libgnashbase_la-FLVParser.lo -MD -MP -MF .deps/libgnashbase_la-FLVParser.Tpo -c FLVParser.cpp -fPIC -DPIC -o .libs/libgnashbase_la-FLVParser.o In file included from /usr/include/boost/date_time/gregorian/gregorian_io.hpp:12, from /usr/include/boost/date_time/gregorian/conversion.hpp:23, from /usr/include/boost/date_time/gregorian/gregorian.hpp:21, from /usr/include/boost/date_time/posix_time/time_formatters.hpp:12, from /usr/include/boost/date_time/posix_time/posix_time.hpp:24, from ../libamf/element.h:31, from ../libamf/amf.h:30, from FLVParser.cpp:25: /usr/include/boost/date_time/date_facet.hpp:560: error: declaration of 'void boost::date_time::date_input_facet<date_type, CharT, InItrT>::special_values_parser(boost::date_time::special_values_parser<date_type, charT>)' /usr/include/boost/date_time/special_values_parser.hpp:34: error: changes meaning of 'special_values_parser' from 'class boost::date_time::special_values_parser<date_type, charT>' make[2]: *** [libgnashbase_la-FLVParser.lo] Fehler 1 make[2]: Leaving directory `/usr/local/src/gnash-0.8.2/libbase' make[1]: *** [all-recursive] Fehler 1 make[1]: Leaving directory `/usr/local/src/gnash-0.8.2' make: *** [all] Fehler 2 (well, its partly german; "Fehler" means "error". Is this an error inside boost? Or is it possible that gnash-sources define a prototype in a wrong manner? I tried to compile boost and used F77=gfortran-4.3 CC="ccache gcc-4.3" CXX="ccache g++-4.3" CFLAGS="-O3 -mfpmath=sse -mtune=athlon64 -msse2 -mmmx -m3dnow -fexpensive-optimizations -fgcse -ffast-math -m64" CXXFLAGS="-O3 -mfpmath=sse -mtune=athlon64 -msse2 -mmmx -m3dnow -fexpensive-optimizations -fgcse -ffast-math -m64" ./configure --prefix=/usr --libdir=/usr/lib64 --with-libraries=all --exec-prefix=/usr/bin to configure it and because I got messages like gcc.compile.c++ bin.v2/libs/thread/build/gcc-4.1.2/debug/threading-multi/condition.o during make, I did a make distclean, another configure as above and typed: make F77=gfortran-4.3 CC="ccache gcc-4.3" CXX="ccache g++-4.3" CFLAGS="-O3 -mfpmath=sse -mtune=athlon64 -msse2 -mmmx -m3dnow -fexpensive-optimizations -fgcse -ffast-math -m64" CXXFLAGS="-O3 -mfpmath=sse -mtune=athlon64 -msse2 -mmmx -m3dnow -fexpensive-optimizations -fgcse -ffast-math -m64" and got the same log telling me there is something compiled for the prepredecessor of the actual compiler. Do I have to edit all the Makefiles by hand? If yes, what is the ./configure script for? Or do I have to use the old old gcc-4.1 ("old" would have been gcc-4.2) ? Greetings and TIA from a hopelessly lost Peter P.S.: my mail-client told me it could not send it because I need a valid email address (nonsense, because I tried it first with my mostly used address). If this message comes twice, I apologize.

5 4

[multi_index] GCC optimization warns about uninitialized variables
by cp now 16 Mar '08

16 Mar '08

Hello. I have a multi_index container that stores (and owns) pointers. It has 4 indexes that order themselves on member functions. I get error-free and warning-free compiles as long as optimization is turned off (-O0). I get the warning below at all levels of optimization (1 through 3). I've stripped the code down to just what seems to be generating the error. --- BEGIN test.cpp --- #include <iostream> #include <typeinfo> #include <map> #include <boost/ref.hpp> #include <boost/multi_index_container.hpp> #include <boost/multi_index/sequenced_index.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/key_extractors.hpp> using namespace boost::multi_index; typedef boost::reference_wrapper<const std::type_info> TypeInfo; #if 0 bool operator<(TypeInfo t1, TypeInfo t2) { const std::type_info& t = t1; return t.before(t2); } #endif namespace std { template<> struct less<TypeInfo> { bool operator()(const TypeInfo& t1, const TypeInfo& t2) { const std::type_info& t = t1; return t.before(t2); } }; } struct NodeBase { std::string getID() const {return "blah";} TypeInfo getresulttypeinfo() const {return TypeInfo(typeid(int));} std::string name() const {return "name";} }; typedef multi_index_container< const NodeBase*, indexed_by< sequenced<> , ordered_unique< const_mem_fun<NodeBase, std::string, &NodeBase::getID> > , ordered_non_unique< const_mem_fun<NodeBase, TypeInfo, &NodeBase::getresulttypeinfo> > , ordered_non_unique< const_mem_fun<NodeBase, std::string, &NodeBase::name> > > > NodeMultiIndex; int main() { NodeMultiIndex c; NodeMultiIndex::nth_index<0>::type& index = c.get<0>(); index.push_back(new NodeBase()); std::cout << *index.begin() << std::endl; return 0; } --- END test.cpp --- Compiling with G++ 4.1.1 with full optimizations and full warnings: g++-4.1.1 -I../eclipselibs/boost -O3 -Wall -c -fmessage-length=0 test.cpp ../eclipselibs/boost/boost/multi_index/ordered_index.hpp: In member function 'boost::multi_index::detail::ordered_index_node<typename SuperMeta::type::node_type>* boost::multi_index::detail::ordered_index<KeyFromValue, Compare, SuperMeta, TagList, Category>::insert_(typename boost::call_traits<typename boost::multi_index::detail::ordered_index_node<typename SuperMeta::type::node_type>::value_type>::param_type, boost::multi_index::detail::ordered_index_node<typename SuperMeta::type::node_type>*) [with KeyFromValue = boost::multi_index::const_mem_fun<NodeBase, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, &NodeBase::getID>, Compare = std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, SuperMeta = boost::multi_index::detail::nth_layer<2, const NodeBase*, boost::multi_index::indexed_by<boost::multi_index::sequenced<boost::multi_index::tag<mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na> >, boost::multi_index::ordered_unique<boost::multi_index::const_mem_fun<NodeBase, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, &NodeBase::getID>, mpl_::na, mpl_::na>, boost::multi_index::ordered_non_unique<boost::multi_index::const_mem_fun<NodeBase, boost::reference_wrapper<const std::type_info>, &NodeBase::getresulttypeinfo>, mpl_::na, mpl_::na>, boost::multi_index::ordered_non_unique<boost::multi_index::const_mem_fun<NodeBase, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, &NodeBase::name>, mpl_::na, mpl_::na>, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, std::allocator<const NodeBase*> >, TagList = boost::mpl::vector0<mpl_::na>, Category = boost::multi_index::detail::ordered_unique_tag]': ../eclipselibs/boost/boost/multi_index/ordered_index.hpp:551: warning: 'inf$side' may be used uninitialized in this function I can eliminate this warning (for all levels of optimization) with the patch below. Index: boost/multi_index/ordered_index.hpp =================================================================== RCS file: /cvsroot/boost/boost/boost/multi_index/ordered_index.hpp,v retrieving revision 1.12.2.3 diff -u -r1.12.2.3 ordered_index.hpp --- boost/multi_index/ordered_index.hpp 26 Feb 2007 09:16:36 -0000 1.12.2.3 +++ boost/multi_index/ordered_index.hpp 16 Mar 2008 01:40:02 -0000 @@ -549,6 +549,7 @@ node_type* insert_(value_param_type v,node_type* x) { link_info inf; + inf.side = to_left; inf.pos = 0; if(!link_point(key(v),inf,Category())){ return node_type::from_impl(inf.pos); } I imagine something similar would have to be done for the other insert functions, though my code probably doesn't use them and so the warnings aren't generated at that line. Alternatively, the link_info struct could have a default constructor that initializes the members. Or link_point() etc. could return tuples, eliminating the need for pass-by-reference, etc. Is there an easier workaround than patching the library header? Or, worse, am I doing something wrong? Thanks V

2 1

[serialization] Cannot increase version of stored objects
by Robert Bielik 15 Mar '08

15 Mar '08

I need to update the version certain objects in my structure, but I cannot get the version number incremented. Scenario: I have a class MyClass which have several entries of InternalClass objects (which is the one I want a new version of): class MyClass { ... template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & BOOST_SERIALIZATION("MyInternals", m_vector_of_internal_class_objects); } std::vector<InternalClass> m_vector_of_internal_class_objects; class InternalClass { template<class Archive> void save(Archive & ar, const unsigned int version) const { ar & BOOST_SERIALIZATION("data", m_data); } template<class Archive> void load(Archive & ar, const unsigned int version) { if (version == 0) { old_data_t tmp; ar & BOOST_SERIALIZATION("data", tmp); m_data = convertToNewData(tmp); } else { BOOST_CHECK(version == 1); ar & BOOST_SERIALIZATION("data", m_data); } } BOOST_SERIALIZATION_SPLIT_MEMBER() new_data_t m_data; } } Then in the body (.cpp) I define: BOOST_CLASS_VERSION(MyClass::InternalClass, boost::serialization::object_class_info) BOOST_CLASS_VERSION(MyClass::InternalClass, 1) But when saving to the XML archive file, I still get version="0" for the InternalClass objects (?) /R

2 3

function template overload resolutions
by Hicham Mouline 15 Mar '08

15 Mar '08

Hello As functions templates cannot be partially specialized, Sutter(05) advices that one can use overload resolution instead: I have // header N.h namespace A { namespace B { namespace C { template<typename cT, typename tT, int n> void make(const cT&, const tT&, const Head<n>& h) {...} } } } // header 3.h namespace A { namespace B { namespace C { template<typename cT, typename tT> void make(const cT&, const tT&, const Head<3>& h) {...} } } } // header 2.h namespace A { namespace B { namespace C { template<typename cT, typename tT> void make(const cT&, const tT&, const Head<2>& h) {...} } } } // Translation unit #include N.h #include 3.h #include 2.h //in this order A::B::C::make(...) The overload resolution is done on the Head<n>&, Head<2>&, Head<3>... Is it sensitive to order of inclusion? rds,

1 0

dll or not dll or what?
by Martina Janter 15 Mar '08

15 Mar '08

Hello! being a beginner in C++ and boost I set up the stuff for use with VC++ 2005 Express just today. After some problems I finally managed to get it link, but it's still not fully the way I want. There are three libs: boost...dll, libboost...lib and libboost...s...lib. My questions: -What's the difference between the second and the third one? -Why does building with the IDE link against the second and building on the console (/ link /LIBPATH:...) link against the third type? I looked into auto_link.hpp and the IDE seems to set _DLL but boost doesn't define BOOST_DYN_LINK. But I can't find out why. This leads to question 3: -How to link so the dll will be used? That questions might be a good deal compiler specific but since auto_link.hpp is involved I hope here's still the right place to ask. Thank you in advance! AJ Martin

2 1

[multi_array] Assertion failure in multi_array<...>::resize
by Rainer Deyke 15 Mar '08

15 Mar '08

The following minimal test program produces an assertion failure. Is this a bug in boost::multi_array or a bug in the test program? #include "boost/multi_array.hpp" int main() { boost::multi_array<bool, 1> a; a.resize(boost::extents [boost::multi_array_types::extent_range(1, 2)]); return 0; } -- Rainer Deyke - rainerd(a)eldwood.com

1 0

[interprocess] Where to get it?
by Boris 14 Mar '08

14 Mar '08

Is the CVS the only place to get the source code of Boost.Interprocess? I thought I would find a zip archive at http://www.boost-consulting.com/vault/ at least so I don't need to pick files one by one from the CVS. Any other place where I can download the current version of Boost.Interprocess quickly? I know the documentation at http://igaztanaga.drivehq.com/interprocess/ but there is no link either? :-/ Boris

2 4

[Mutex] behaviour??
by Yasmina Berber 14 Mar '08

14 Mar '08

Hi, everybody I have a problem to understand mutex behaviour in a server client program . basically there are two threads that execute different code in two different classes but manipulate the same resource: fisrt Class is Subscriber with these members : public: ACE_Unbounded_Set<client_reference> m_set; typedef boost::recursive_mutex Mutex; typedef boost::recursive_mutex::scoped_lock Lock; Mutex mutex_set; and methods: Subscribe (client_reference) : inserts (add) a reference client to the set { ... Lock theScope( mutex_set); m_set.insert (client_reference) ... } Unsubscribe(client_reference) : removes a reference client from the set { ... Lock theScope( mutex_set); m_set.remove (client_reference) } the second class is Manager that has a shared pointer to Subscriber (SubscriberPtr) and does a specific opeartion on each client_reference inside a for loop in the method Manage() { boost::recursive_mutex::scoped_lock scoped_lock(subscriberPtr->mutex_set) for (Subscriber::Set_Iterator iter (subscriberPtr->m_set); iter.next (...) != 0 ; iter.advance ()) { specific opeartion on each client reference } } What happens is that a client can be removed (call to Unsubscribe()) by the first thread during the second one is executing manage() : the set is not well protected and this causes of course seg fault. I probably do something wrong, If you need more details please let me know. Regards.

2 1

Boost.Regex and static ICU libraries
by a86yes 14 Mar '08

14 Mar '08

Hello, The ICU4C readme says that the define U_STATIC_IMPLEMENTATION should be defined in user code that links against ICU's static libraries. Grepping the entire Boost, I do not see it. Is linking against ICU static libraries supported at all and if yes, where is the best place to define this macro when building Boost.Regex? _________________________________________________________________ Сдобий се със следващата генерация Windows Live услуги сега! http://get.live.com

2 3

a few boost interprocess question
by Abir Basak 14 Mar '08

14 Mar '08

Hi, i just started using boost interprocess for giving shared memory access to one of my program to the debugger. It is just superb! but as usual there are a few questions and clarifications, 1) can i find any document saying which of the stl containers are "shared memory safe" so that i dont need to use the special one provided ? esp which of the stl containers from msvc 7.1 (2003) are shmm safe . 2) how can i make my hand crafted container shmm compatible ? I take allocater as param, pointer & ref are typedef from allocater, all construct & destroy are done using allocator. thanks again for the wonderful library abir

3 3

Undefined reference to 'main' with Boost Test. Why?
by Stephen Torri 14 Mar '08

14 Mar '08

Why in the heck did the boost unit test framework change to remove main? Why does the documentation not reflect this? Why are the example describing the old behavior? How am I now suppose to use the Boost unit test framework? The following program will NOT compile because of the change in 1.34.1 since the 1.33: /* test_grnn.cpp #include <boost/test/unit_test.hpp> using namespace boost::unit_test_framework; void test_distance_squared () { // do work } test_suite* init_unit_test_suite ( int, char** ) { test_suite* test = BOOST_TEST_SUITE ("GRNN test suite"); // Allow GRNN to allocate our memory at any location test->add ( BOOST_TEST_CASE ( &test_distance_squared ) ); return test; }

2 6

[function] setting a function from within a call on the function?
by Cory Nelson 14 Mar '08

14 Mar '08

Hi guys, ran across a question that I'd have thought would be at least common enough to get a note in the docs, but I can't find it there. Is it safe to set a function from within a call on the function? boost::function<void()> f; void func2(); void func1() { f = func2; } void main() { f = func1; f(); } -- Cory

2 1

[bind] VC++ 2008 compiler error
by Boris 14 Mar '08

14 Mar '08

Can anyone explain to me why VC++ 2008 refuses to compile this code: void empty() { } template <class T> void foo(T t) { // error C2664: 'void (T)' : cannot convert // parameter 1 from 'void' to 'boost::_bi::bind_t<R,F,L>' boost::bind(bar<T>, t)(); // This one works though: boost::bind(bar<T>, _1)(t); } template <class T> void bar(T t) { t(); } int main() { foo(boost::bind(empty)); } Is this a problem with the VC++ 2008 compiler or am I trying to do something which isn't supported by Boost.Bind? Boris

2 2

[python] "Interpreter not initialized"
by Robert Dailey 13 Mar '08

13 Mar '08

Hi, When I execute the following code: BEGIN CODE -------------------------------------------------- #define BOOST_PYTHON_DEF( func ) boost::python::def( #func, func ) using namespace boost::python; static char const* PrintHelloWorld() { return "Hello World!"; } BOOST_PYTHON_MODULE(Script) { BOOST_PYTHON_DEF( PrintHelloWorld ); } void BeginPythonTest() { try { Py_Initialize(); initScript(); Py_Finalize(); } catch( error_already_set const& /*err*/ ) { PyErr_Print(); } catch( std::invalid_argument const& /*err*/ ) { PyErr_Print(); } } -------------------------------------------------- END CODE I receive the following error message: *Fatal Python error: Interpreter not initialized (version mismatch?)* This occurs when I step over the call to initScript() (in the code snippet above). I have no idea why this is happening. I'm currently linking against boost 1.34.1. I built all the libraries for boost myself using bjam. I built the multithreaded debug and release shared libraries. I'm using the SDK from Python 2.5.1. I also built the debug and release shared libraries for Python myself. My operating system is Microsoft Windows XP Professional. All help is appreciated. Thanks in advance!

2 1

Visual C++ does not recognize lambda metafunction as such
by Matt Brown 13 Mar '08

13 Mar '08

I just tried to build this code in visual studio 2005, and got error: error C3201: the template parameter list for class template 'boost::mpl::bind2<F,T1,T2>::apply' does not match the template parameter list for template parameter 'boolfunc' This code works fine with gcc, and boost mpl portability page (http://www.boost.org/libs/mpl/doc/tutorial/portability.html) says my version of visual studio should be able to compile this. However, it appears to think the lambda< ... >::type::apply is not a metafunction. Any help will be greatly appreciated. -Matt Brown #include <iostream> #include <boost/mpl/lambda.hpp> #include <boost/type_traits/is_same.hpp> #include <boost/mpl/placeholders.hpp> template <template <typename> class boolfunc> class test { public: static void print() { if(boolfunc<int>::type::value) { std::cout << "int: true\n"; } } }; int main(void) { test< boost::mpl::lambda< boost::is_same<boost::mpl::_1, int> >::type::apply >::print(); };

2 4

passing comma to macro
by Warlich, Christof (Christof) 13 Mar '08

13 Mar '08

Hi, the following code does not compile: #include <boost/preprocessor/if.hpp> #include <boost/preprocessor/comma.hpp> #include <boost/type_traits/is_convertible.hpp> #include <iostream> class A {}; int main(void) { BOOST_PP_IIF(boost::is_convertible<A BOOST_PP_COMMA() A>::value, // condition std::cout << "ifbranch";, // then std::cout << "elsebranch";); // else return 0; } With gcc, it gives the following errors: tst.cc:9:30: error: macro "BOOST_PP_IIF_I" passed 4 arguments, but takes just 3 tst.cc: In function int main(): tst.cc:7: error: BOOST_PP_IIF_I was not declared in this scope I would have expected that BOOST_PP_COMMA() has just been provided to deal with cases like this! I'm just new to Boost, so my apologies if I have overseen something obvious. Thanks for any help, Christof

3 4

GraphProperty with adjacency_list cause a VC++ internal compiler error.
by Schick, Thorben (ITUC; ADITG/DFG) 13 Mar '08

13 Mar '08

I know this is a known problem and what i really want to know is, wether this problem is fixed with the upcoming version 9 of Visual Studio? Or maybe someone knows about a quite easy work-around to solve this problem. Regards Thorben

1 0

Re: [Boost-users] [Mutex] behaviour??
by Yasmina Berber 13 Mar '08

13 Mar '08

Yasmina Berber wrote: > Hi, everybody > I have a problem to understand mutex behaviour in a server client program . > basically there are two threads that execute different code in two > different classes but manipulate the same resource: > fisrt Class is Subscriber with these members : > > public: > ACE_Unbounded_Set<client_reference> m_set; > typedef boost::recursive_mutex Mutex; > typedef boost::recursive_mutex::scoped_lock Lock; > Mutex mutex_set; > > and methods: > Subscribe (client_reference) : inserts (add) a reference client > to the set > { ... > Lock theScope( mutex_set); > m_set.insert (client_reference) > ... > } > Unsubscribe(client_reference) : removes a reference client from the set > { ... > Lock theScope( mutex_set); > m_set.remove (client_reference) > } > > > the second class is Manager that has a shared pointer to Subscriber > (SubscriberPtr) and does a specific opeartion on each > client_reference inside a for loop in the method > Manage() > { > boost::recursive_mutex::scoped_lock scoped_lock(subscriberPtr->mutex_set) > for (Subscriber::Set_Iterator iter (subscriberPtr->m_set); iter.next > (...) != 0 ; iter.advance ()) > { > specific opeartion on each client reference > } > } > What happens is that a client can be removed (call to Unsubscribe()) by > the first thread during the second one is executing manage() : the set > is not well protected and this causes of course seg fault. > > I probably do something wrong, > If you need more details please let me know. > Regards. > > > Hi Could any one help me in this forum? Thank you

2 2

Another Regex Question
by Dave DeLong 13 Mar '08

13 Mar '08

This is both a Regex syntax and a boost question (in, so here goes... I've got the following code to strip out all <a>, <frame>, and <iframe> tags from a webpage and parse them for their href or src attributes (yes, I realize that it can potentially grab an <a src=""> or an <iframe href="">, but that's ok for this project). Surprise surprise, it doesn't work quite as I'd hoped, and I was wondering if you could help me ascertain the problem: (pageSource is a pointer to a string containing the source of the page; the project specifications allow for the attribute to be formatted with either a single or double quote or neither around the actual URL. It correctly finds each tag and attribute, but it's grabbing the URL and also the "> that follow it.) How can I get rid of the closing "> ? void Page::parseLinks() { boost::regex linkTagRegex("(?i)<(a|i?frame)[^>]*>"); boost::regex linkRegex("(?i)(href|src)\\s*?=[\\w]*?([\\W]*?)[\\w]+?"); boost::sregex_token_iterator p(pageSource->begin(), pageSource->end(), linkTagRegex, 0); boost::sregex_token_iterator end; for (; p != end; p++) { string tag(p->first, p->second); boost::cmatch matches; if (boost::regex_search(tag.c_str(), matches, linkRegex)) { string * newLink = new string(matches[2].first); URL * foundLink = new URL(newLink); delete newLink; foundLink->resolveWithRespectTo(pageURL); foundLinks->add(foundLink); } } } Thanks! Dave

2 1

program_options: Printing options and their values
by Jeremy Conlin 13 Mar '08

13 Mar '08

I am using program_options and want to write to the screen the options and their values. This allows me to verify everything is working properly before I execute a long running command. I thought I could just iterate over the map and print out each option, but that requires casting the option to a specific variable which must be known a priori. This is what I have right now cout << "options:\n"; po::variables_map::iterator optIter = options.begin(); for( ; optIter != options.end(); ++optIter ){ cout << "\t" << optIter->first << " = " << optIter->second.as<string>() << std::endl; } When my option isn't a string (e.g. bool or int) then I get the error: terminate called after throwing an instance of 'boost::bad_any_cast' what(): boost::bad_any_cast: failed conversion using boost::any_cast Can someone show me how to do this? Thanks, Jeremy

2 2

Installing Boost (was: Re: Regex problem)
by Dave DeLong 13 Mar '08

13 Mar '08

I just ssh'd onto a Linux machine here at my school and compiled and ran it there, and the test code works fine, so I guess I have a problem with my boost install. All I did was download the tar, untar it, cd into the directory, and run "sudo make install". It ran for about four hours (I have an older Powerbook G4). Did I miss a step? Dave

2 5

REG_PERLEX Revisited...
by Phil Hystad 12 Mar '08

12 Mar '08

In follow up to the message and response quoted below. Boost regex seems to work fine on Mac OS X and on our Linux platforms. But, on Windows 32 bit we have the following situation. Note this message is a little bit on the long side given that I am including a short program and the output from running on Windows and Linux platforms. The brief program shown below illustrates this problem. The results are from the Linux and Windows 32-bit machine. You can see on Windows when using the Posix API, I get the right offset only if I use boost::REG_PERL or boost::REG_PERLEX. On Linux, it works fine for all flags. Program ---------- #include <boost/regex.hpp> #include <boost/regex.h> #include <string> #include <iostream> using namespace std; static const char* szPattern="[A-Z][a-z]*"; static const char* szString="small is Great for the Big and Tall"; void f1_(boost::regex::flag_type flag, const char* flag_str) { cout << "\nUsing boost::regex, flag=" << flag << " (" << flag_str << ")" << endl; std::string s = szString; boost::regex re(szPattern, flag); boost::match_results<std::string::const_iterator> what; boost::regex_search(s, what, re); std::cout << "pos=" << what.position() << " len=" << what.length() << std::endl; } void f2_(int flag, const char* flag_str) { cout << "\nUsing Posix, flag=" << flag << " (" << flag_str << ")" << endl; regex_t pattern; int x = regcomp(&pattern, szPattern, flag); if ( x != 0 ) { std::cout << "regcomp - error" << std::endl; return; } regmatch_t matches[5]; x = regexec(&pattern, szString, 5, matches, 0); if ( x != 0 ) { std::cout << "regexec - error" << std::endl; return; } std::cout << "matches[0].rm_so=" << matches[0].rm_so << std::endl; std::cout << "matches[0].rm_eo=" << matches[0].rm_eo << std::endl; } #define f1(x) f1_(x, #x) #define f2(x) f2_(x, #x) int main() { cout << "Regex=" << szPattern << endl; cout << "Input=" << szString << endl; f1(boost::regex::normal); f1(boost::regex::basic); f1(boost::regex::extended); f1(boost::regex::awk); f1(boost::regex::grep); f1(boost::regex::egrep); f1(boost::regex::sed); f1(boost::regex::perl); f2(0); // default f2(boost::REG_EXTENDED); f2(boost::REG_BASIC); f2(boost::REG_PERL); f2(boost::REG_AWK); f2(boost::REG_GREP); f2(boost::REG_EGREP); f2(boost::REG_PERLEX); return 0; } Output From Windows -------------------------- Regex=[A-Z][a-z]* Input=small is Great for the Big and Tall Using boost::regex, flag=0 (boost::regex::normal) pos=9 len=5 Using boost::regex, flag=2162689 (boost::regex::basic) pos=0 len=5 Using boost::regex, flag=2163456 (boost::regex::extended) pos=0 len=5 Using boost::regex, flag=2097920 (boost::regex::awk) pos=0 len=5 Using boost::regex, flag=2293761 (boost::regex::grep) pos=0 len=5 Using boost::regex, flag=2294528 (boost::regex::egrep) pos=0 len=5 Using boost::regex, flag=2162689 (boost::regex::sed) pos=0 len=5 Using boost::regex, flag=0 (boost::regex::perl) pos=9 len=5 Using Posix, flag=0 (0) matches[0].rm_so=0 matches[0].rm_eo=5 Using Posix, flag=1 (boost::REG_EXTENDED) matches[0].rm_so=0 matches[0].rm_eo=5 Using Posix, flag=0 (boost::REG_BASIC) matches[0].rm_so=0 matches[0].rm_eo=5 Using Posix, flag=2817 (boost::REG_PERL) matches[0].rm_so=9 matches[0].rm_eo=14 Using Posix, flag=513 (boost::REG_AWK) matches[0].rm_so=0 matches[0].rm_eo=5 Using Posix, flag=1024 (boost::REG_GREP) matches[0].rm_so=0 matches[0].rm_eo=5 Using Posix, flag=1025 (boost::REG_EGREP) matches[0].rm_so=0 matches[0].rm_eo=5 Using Posix, flag=2048 (boost::REG_PERLEX) matches[0].rm_so=9 matches[0].rm_eo=14 LINUX (Redhat) Output ---------------------------- Regex=[A-Z][a-z]* Input=small is Great for the Big and Tall Using boost::regex, flag=0 (boost::regex::normal) pos=9 len=5 Using boost::regex, flag=2162689 (boost::regex::basic) pos=9 len=5 Using boost::regex, flag=2163456 (boost::regex::extended) pos=9 len=5 Using boost::regex, flag=2097920 (boost::regex::awk) pos=9 len=5 Using boost::regex, flag=2293761 (boost::regex::grep) pos=9 len=5 Using boost::regex, flag=2294528 (boost::regex::egrep) pos=9 len=5 Using boost::regex, flag=2162689 (boost::regex::sed) pos=9 len=5 Using boost::regex, flag=0 (boost::regex::perl) pos=9 len=5 Using Posix, flag=0 (0) matches[0].rm_so=9 matches[0].rm_eo=14 Using Posix, flag=1 (boost::REG_EXTENDED) matches[0].rm_so=9 matches[0].rm_eo=14 Using Posix, flag=0 (boost::REG_BASIC) matches[0].rm_so=9 matches[0].rm_eo=14 Using Posix, flag=2817 (boost::REG_PERL) matches[0].rm_so=9 matches[0].rm_eo=14 Using Posix, flag=513 (boost::REG_AWK) matches[0].rm_so=9 matches[0].rm_eo=14 Using Posix, flag=1024 (boost::REG_GREP) matches[0].rm_so=9 matches[0].rm_eo=14 Using Posix, flag=1025 (boost::REG_EGREP) matches[0].rm_so=9 matches[0].rm_eo=14 Using Posix, flag=2048 (boost::REG_PERLEX) matches[0].rm_so=9 matches[0].rm_eo=14 > Message: 4 > Date: Mon, 10 Mar 2008 18:08:16 -0000 > From: "John Maddock" <john(a)johnmaddock.co.uk> > Subject: Re: [Boost-users] REG_PERLEX > To: <boost-users(a)lists.boost.org> > Message-ID: <00a201c882d9$bab38360$83d56b51@fuji> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > Phil Hystad wrote: >> Does anyone know the definition of REG_PERLEX? >> >> I am using the regex/regcomp traditional unix/posix API supported by >> Boost Regular Expression library. On a Windows 32 bit platform we >> are >> forced to use REG_PERLEX on the regcomp flags argument whereas for >> the >> same application we get by using a zero flag value on regcomp on >> platforms: Mac OS X and Linux. > > REG_PERLEX allows the engine to accept Perl style regular > expressions - what > kind of expressions are you using, and what differences do you > observe on > the different platforms - there shouldn't really be any difference in > behaviour. > > John.

2 1

Re: [Boost-users] Regex problem UPDATE
by Daniel Lord 12 Mar '08

12 Mar '08

Update: the fixed regex (removed the colon in "(?:i)") works to capture the script tags and their enclosure and remove it from the string. Mac OS X 10.5.2 Xcode 3.0 on an Intel Core Duo 2 Macbook Pro. The console transcript from Xcode (I added some text to embellish the output and print the original string before replacement): [Session started at 2008-03-12 09:36:10 -0700.] *Original String: <html><head><script src="script.js"></script><title>Some title</title></head><body>Hello, world!</body></html>* *New String: <html><head><title>Some title</title></head><body>Hello, world!</body></html>* The Debugger has exited with status 0. On 3/12/08, John Maddock <john(a)johnmaddock.co.uk> wrote: > > Dave DeLong wrote: > >> My platform is Mac OS X 10.5.2. I'm compiling and running via Xcode > >> 3.0. Boost is version 1.34.1 (I installed it in the last two weeks). > >> It was compiled on this machine by running "sudo make install", which > >> installed it in /usr/local/include/boost. The library files are in / > >> usr/local/lib. In my project specification, I specify those paths in > >> my Library and Header search paths, and also add the linker option "- > >> lboost_regex". > >> > >> The following code gets a EXC_BAD_ACCESS error and never executes the > >> catch blocks: (I realize that the pageSource doesn't actually have a > >> <script> tag; That's because I don't know if the pages I'll be > >> parsing will have one. However, the code still fails even if there > >> is a <script>TESTSCRIPT</script> tag in there.) > > Works for me on Win32 and VC++, I don't have a Mac so I can't try it > there. > I mis-wrote the regex BTW, it should be > "(?i)<script[^>]*>.*?</script[^>]*>". > > This still looks like you're linking to something that isn't binary > compatible with your application: but I don't know enough (or indeed > anything) about MacOS to be able to help with that. > > John. > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

1 0

Regex problem
by Dave DeLong 12 Mar '08

12 Mar '08

Hi everyone, I'm trying to parse an HTML page using the Regex library and am running in to errors. In the following snippets, "pageSource" is a string pointer to the contents of an html file. This code causes my app to crash: void Page::removeScriptTags() { boost::regex tagRegex("<[sS][cC][rR][iI][pP][tT][\\w\\W]*?>[.]*?</\ \s*?[sS][cC][rR][iI][pP][tT]\\s*?>"); string replaced = boost::regex_replace(*pageSource, pageSource, tagRegex, " ", boost::match_default); delete pageSource; pageSource = new string(replaced); } and this code crashes when attempting to destruct "matches": void Page::findTitleSummary() { boost::cmatch matches; boost::regex bodyRegex("<[tT][iI][tT][lL][eE][\\w\\W]*?>([^<]*)</\\s*? [tT][iI][tT][lL][eE]\\s*?>"); if (boost::regex_search(pageSource->c_str(), matches, bodyRegex)) { pageSummary = new string(matches[1]); hasFoundSummary = true; } } What am I missing? Thanks, Dave

4 7

Re: [Boost-users] link problem: boost + stlport + msvc8
by CHABO Gabriel 12 Mar '08

12 Mar '08

Hi, I'm still having problems with this issue, so I'll repost it: This is my setup: Windows XP SP2 Visual Studio 2005 STLport-5.1.5 boost_1_34_1 I'm trying to write a tiny program, just to get stlport and boost to play nice together and I still have "unresolved external symbol" errors. I downloaded stlport-5.1.5 and built it according to the instructions: * configure.bat -c msvc8 * nmake /f msvc.mak * nmake /f msvc.mak install I also added stlport\bin to my path Next, I downloaded the boost_1_34_1 windows installer and checked all the options to get all the libraries and added it to my path. Next, I configured visual studio 2005 as follows: Tools -> Options -> Project and Solutions -> VC++ Directories -> Show directories for: Include Files: Add the path to stlport headers (D:\Program Files\STLport-5.1.5\stlport) Library Files: Add the path to stlport libs (D:\Program Files\STLport-5.1.5\lib) Next, on the project level, I Added __STL_DEBUG to the list of preprocessors. I'm trying to build a Multi-threaded Debug DLL (/MDd). I also set the (/Zc:wchar_t-) option. I also added "D:\Program Files\boost\boost_1_34_1" to the list of Additional Include Directives. When I tried to link, I got an error saying that libboost_program_options-vc80-mt-gdp-1_34_1.lib could not be found, so I had to build it. I edited the user-config.jam file to add the following line: using stlport : : D:/Program Files/STLport-5.1.5 D:/Program Files/STLport-5.1.5/lib ; This is the command I used to build the new lib bjam --toolset=msvc-8.0 link=static stdlib=stlport threading=multi cxxflags="-Zc:wchar_t-" --with-program_options -a -d2 I built the lib and moved it from bin.v2 to lib. As you can see I took every precaution with wchar_t so that all the libs are compatible, and still every time I try to link the simple program I get this error: error LNK2019: unresolved external symbol "public: __thiscall boost::program_options::options_description::options_description(class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> > const &,unsigned int)" (??0options_description@program_options@boost@@QAE@ABV?$basic_string@DV? $char_traits@D@stlpd_std@@V?$allocator@D@2@@stlpd_std@@I@Z) referenced in function _main This is the simple program in question: #include <iostream> #include <boost/program_options.hpp> int main(int argc, char* argv[]) { std::cout<<"boost stlport test\n"; boost::program_options::options_description desc("Allowed options"); return 0; } Any help is greatly appreciated Thx Gabriel ******************************* This e-mail contains information for the intended recipient only. It may contain proprietary material or confidential information. If you are not the intended recipient you are not authorised to distribute, copy or use this e-mail or any attachment to it. Murex cannot guarantee that it is virus free and accepts no responsibility for any loss or damage arising from its use. If you have received this e-mail in error please notify immediately the sender and delete the original email received, any attachments and all copies from your system.

1 0

[mpl] integral constant overflow
by klaus triendl 11 Mar '08

11 Mar '08

Hi, I've recently started studying the book "c++ template meta programming" (I like it a lot!) and one of my own exercises was to get an integral type's max/min value. To get the type's maximal value I've created a metafunction max_val; Compiling the code below with vc++2008 warning level 2+ yields the warning "truncation of constant value" or "integral constant overflow" if I use an int instead of a char. <code> namespace mpl = boost::mpl; template<typename T> struct significant_bits: mpl::int_<std::numeric_limits<T>::digits> {}; template<typename T> struct max_val_impl: mpl::accumulate< mpl::range_c<int, 1, significant_bits<T>::value>, mpl::integral_c<T, 1>, mpl::next<mpl::plus<mpl::_1, mpl::_1> > > {}; template<typename T> struct max_val: max_val_impl<T>::type { BOOST_MPL_ASSERT((boost::is_integral<T>)); }; int main() { const char maxval = max_val<char>::value; return 0; } </code> The problematic metafunction instantiation boils down to mpl::integral_c<char, 127> where mpl::integral_c<char, 127>::next results in 128 which is then truncated. Of course I can turn off the compiler warnings but since the warning happens in integral_wrapper.hpp and the integral constant stuff is included in many other files including the boost type traits it would be tedious to always remember to include integral_c.hpp explicitly before any other headers with the warnings turned off. I don't know whether there is a really satisfying option, just wanted to discuss this point. Klaus Triendl

2 1

Serialization registration?
by Jerry 11 Mar '08

11 Mar '08

Hi, boost::serialization is wonderful. It has saved a massive amount of effort when adding XML based storage to an existing C++ drawing library. A very big thank you to the author and the team. Questions arising: 1. After one or two crash & burn cycles i discovered the need to register derived classes in the 'save through a virtual base class pointer' scenario. Right now this is done when saving to/loading from the archive. Is there an alternative to this method that ensures registration occurs automatically? i'm sure this is a FAQ but cannot find a definitive answer. i..e // XML archive boost::archive::xml_iarchive ia(ifs); // ensure derived types are registered - too easy to forget, what's the better way? ia.register_type(static_cast<CDiagramButton*>(NULL)); 2. Serializing to a binary storage should be a great way to implement undo/redo and clipboard functionality - has anyone found fame and fortune doing this? Cheers Jerry.

4 6

[Boost.Test]Possible BOOST_CLASS_TEST_CASE bug
by Tomislav Adamic 11 Mar '08

11 Mar '08

Code below doesn't compile. Workaround is provided also but is not satisfactory ------------------------------------------------------------------------------- #include <boost/test/unit_test.hpp> #include <boost/shared_ptr.hpp> using namespace boost::unit_test; class ToBeTested { public: ToBeTested() {} int feature1() const { return 1; } int feature2() const { return 2; } }; class ComplexTest { public: ComplexTest() {} void test1() const { ToBeTested t; BOOST_CHECK (t.feature1() == 1); } void test2() { ToBeTested t; BOOST_CHECK (t.feature2() == 2); } }; class TestSuite : public boost::unit_test::test_suite { public: typedef boost::shared_ptr<ComplexTest> ComplexTestPtr; TestSuite () : boost::unit_test::test_suite ("test suite") { ComplexTestPtr instance (new ComplexTest); test_case* t1 = BOOST_CLASS_TEST_CASE (&ComplexTest::test1, instance); test_case* t2 = BOOST_CLASS_TEST_CASE (&ComplexTest::test2, instance); add (t1); add(t2); } }; boost::unit_test::test_suite* init_unit_test_suite( int argc, char * argv[] ) { framework::master_test_suite().add(new TestSuite); return 0; } ------------------------------------------------------------------------------- MSVC 2005 gives following compile time message: test_case* t1 = BOOST_CLASS_TEST_CASE (&ComplexTest::test1, instance); : 'boost::unit_test::make_test_case' : function does not take 3 arguments Problem: ComplexTest::test1() is const method. BOOST_CLASS_TEST_CASE refuses to work properly with const methods. ComplexTest::test2() is not const and works as expected. Workaround Methods from test classes that will be used by BOOST_CLASS_TEST_CASE should not be const. Information applies to: boost v1.34.1 WinXP SP2 Microsoft Visual Studio 2005 SP1

2 2

Help with [Boost.Iterator] conditional operator
by Robert Umland 11 Mar '08

11 Mar '08

I just recently started using boost and had a question about the ++operator for iterators. What I have is a class foo that has a container of class bar. class foo { private: multimap<bool, bar> container; public: pair<bar::iterator, bar::iterator> get_container( bool usable ); }; class bar { public: /* * Return true if bar is usable, false otherwise. */ bool isUsable(); }; I would like to overload the ++operator for multimap so that I can return all bar's that are usable, i.e. call the bar::isUsable() function before returning the pair of iterators. I did find this web page: http://www.zeta.org.au/~jon/STL/views/doc/views.html and was wondering if boost had anything like this already. Thanks. -- ~Robert Umland

2 1

Re: [Boost-users] [uBLAS] iterator for matrix?
by Lang Stefan 11 Mar '08

11 Mar '08

You may be looking for the matrix storage container which you can access via matrix<...>::data() like this: #include <boost/numeric/ublas/matrix.hpp> using namespace std; using namespace boost::numeric::ublas; matrix<double> m (3, 3); copy ( m.data().begin(), m.data().end(), ostream_iterator<double>(cout, " ") ); Of course, if you have a sparse matrix, the number of elements referenced by matrix::data() may be lower than the number of elements your matrix normally should have. Also you have no control over the order of elements: they may be stored by row, by column, or in yet another way! Cheers, Stefan > Date: Tue, 11 Mar 2008 14:25:58 +0800 > From: "Chung-Lin Wen" <jonathan.clwen(a)gmail.com> > Subject: [Boost-users] [uBLAS] iterator for matrix? > To: boost-users(a)lists.boost.org > Message-ID: > <eb7d82f30803102325w448b5a81w352bfa71a48b7258(a)mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > Hi, > > It seems the ublas::matrix don't have begin() and end() that > the ordinary > STL container would have. > It do have begin1(), begin2(), end1(), end2(), but it only > traverse a row or > a column. > So, how could I use the iterators rather than hand-crafted for-loop to > traverse the whole matrix? > > e.g., > copy( matrix.begin(), matrix.end(), > ostream_iterator<element_type>(cout, " ") ) ; // ERROR: won't > compile: matrix don't have begin & end > > (I know matrix have overloaded the operator<<, it's only an example )

1 0

Boost forceinline?
by Robert Dailey 11 Mar '08

11 Mar '08

Hi, I read a thread a while back posted on the boost mailing list concerning a need for a portable forced inline option from the boost library. Instead of giving the OP a direct answer, conversation lead on to discussion involving use cases for forced inline and whether or not it was appropriate to use it, which wasn't very helpful. I'm posting here to see if the boost library has such a feature. I did some searching but I was not able to find anything helpful. Help is appreciated. Thanks in advance.

1 0

[uBLAS] iterator for matrix?
by Chung-Lin Wen 11 Mar '08

11 Mar '08

Hi, It seems the ublas::matrix don't have begin() and end() that the ordinary STL container would have. It do have begin1(), begin2(), end1(), end2(), but it only traverse a row or a column. So, how could I use the iterators rather than hand-crafted for-loop to traverse the whole matrix? e.g., copy( matrix.begin(), matrix.end(), ostream_iterator<element_type>(cout, " ") ) ; // ERROR: won't compile: matrix don't have begin & end (I know matrix have overloaded the operator<<, it's only an example )

1 0

REG_PERLEX
by Phil Hystad 10 Mar '08

10 Mar '08

Does anyone know the definition of REG_PERLEX? I am using the regex/regcomp traditional unix/posix API supported by Boost Regular Expression library. On a Windows 32 bit platform we are forced to use REG_PERLEX on the regcomp flags argument whereas for the same application we get by using a zero flag value on regcomp on platforms: Mac OS X and Linux. Thanks, phil phystad(a)mac.com

2 1

[thread] Priority?
by Ovanes Markarian 10 Mar '08

10 Mar '08

Hello, I used boost thread library a lot and like it very much. Currently, I was reading the C++ Standerd proposal and saw that a thread (as well as boost::thread) does not have a priority. Which reason was it not to implement the thread priority in boost, and why is it not considered in the upcoming standard? I understand this feature is rarely required, but if someone suddenly needs to start a real-time priority thread he/she will be forced to use a third party lib again. Or is there smth. what I miss? Many thanks, Ovanes

4 6

[statechart] Getting state information into the machine
by Commander Pirx 10 Mar '08

10 Mar '08

I'm using the Statechart Library in conjunction with the really exciting Asio Library to set up a communication server. There is a very helpful documentation of the Statechart Library too. But one topic is puzzling me: How to to get data into the state machine? Here is an simple example: Each session object of the server has two states: signed-off and authorized. Receiving a login event leads to a transition to the authorized state. Thats pretty easy. But the login data (stored in the login event) got lost. I can hold this data in the state machine itself (outermost_context()). Or I can use a pseudo event to forward this data to the authorized state. But I'm looking for a nifty way to avoid this overhead. I like this concept of state-local storage very much. But I'm not shure about how to use it.

2 2

Query state on an asynchronous_state_machine
by Jarl Friis 10 Mar '08

10 Mar '08

Hi. Can anyone tell me how to query a state on an asynchronous_state_machine? The obvious answer would be to say use the state_downcast method (which is inherited from state_machine. But in practise it seems harder than so. But opposed to state_machine, when using asynchronous_state_machine the instance is not created explicitely, it is created implicitely by the scheduler, like this: myMachine = myEventHandler.create_processor<AsyncMachine>(); , hence there is no handle to the state machine itself. All I have is a handle to the processor (sc::fifo_scheduler<>::processor_handle ). So is there a way to come from sc::fifo_scheduler<>::processor_handle to AsyncMachine (which inherits sc:asynchronous_state_machine)? Jarl

2 2

[Boost.Iterators] iterator_facade + a class design issue
by Ashkan Aliabadi 10 Mar '08

10 Mar '08

Dear all, I've decided to write an ABC named BasicIterator, from which all derived iterators are to be descended. The reason being that I have to refer to iterators inside an interface and I need a general base type as a place holder to which I can refer. Besides, I don't want to use CRTP in the interface, but I don't care if I'm forced to use it inside BasicIterator. As discussed in the interoperability section of iterator_facade (here<http://www.boost.org/libs/iterator/doc/iterator_facade.html#interoperability>), the euqal() function must be templatized. The problem is that I have to make equal() a pure virtual member function in order to force derived types override it, but templated virtual functions on the other hand, are not valid. So I was wondering what the best approach is. How can I achieve both of these goals? Please advise. Any ideas/suggestions are welcome. Thanks in advance

2 4

[signals] callback for synchronization, how to do?
by Rainer Thaden 10 Mar '08

10 Mar '08

Hi all, maybe a simple question, but I just can't figure it out: I have a class which triggers an action on a remote device. A different thread polls for the response and sends a signal that the response has arrived. What I simply want is a blocking call like this: // connect to the signal which reports the response otherClass.sigResponse().connect( some sort of lamda magic?) SendCommand(cmd); // Wait somehow until the response has arrived WaitForSigResponse(); return; Any help appreciated. Thanks, Rainer

1 0

remove_copy_if adapted as copy_if
by PJ Durai 09 Mar '08

09 Mar '08

Can anyone with advanced template-fu show me to an adaptation of remove_copy_if to be copy_if ? I do realize you just have to negate the predicate parameter of remove_copy_if. I would prefer to use a function that does that automatically, since the code would be easier for my co-workers to follow. thanks pj

2 1

boost exceptions on MacOS 10.5
by Lothar May 09 Mar '08

09 Mar '08

Hi, I've brought this up before, but I still have no solution for this issue, so I will give it another try: Does anyone have boost 1.34.1 compiled on MacOS 10.5 where exceptions can be caught? You might use the following code to test: --cut here-- #include <iostream> #include <boost/filesystem.hpp> using namespace std; using namespace boost::filesystem; int main() { try { directory_iterator i("does_not_exist"); } catch(...) { cout << "This is never printed on MacOS 10.5." << endl; } return 0; } --cut here-- If this works with your installation of boost on MacOS 10.5, please tell me which steps you did to compile boost, and whether you used the static or dynamic version. A related question is: Is boost "supposed to work" on MacOS 10.5? Thanks, Lothar

4 16

Pion Network Library 0.5.4
by Michael Dickey 09 Mar '08

09 Mar '08

In conjunction with the first alpha release of our Pion CEP Platform, Atomic Labs is happy to announce a new release (v0.5.4) of the Pion Network Library, an active, fully-functional and Boost-licensed HTTP 1.0/1.1 client/server library built on top of asio. This new release contains several enhancements, including the ability to define alternative thread management and work scheduling for each server instance (PionScheduler is no longer a singleton), and the ability to bind any function object (or function if you use boost::bind) to an HTTP resource (the use of WebService plugins is now optional). We've also added a std::basic_iostream wrapper for TCPConnection objects called TCPStream. In addition, we fixed several bugs that were identified within the last (v0.5.2) release, including issues with parsing chunked entity content, and with parsing responses that include neither "Content- Length" nor "Transfer-Encoding" HTTP headers. Also, the HTTPRequest and HTTPResponse objects now sort HTTP headers using a case- insensitive map, so lookups should now work properly regardless of the capitalization used (if any). Although we have several new things planned for the next few months (such as adding support for user authentication), the networking library is now mostly stabilized and ready for general use. The Pion CEP Platform is open source software, published under the GNU Affero GPL license. The platform is a real-time event processing engine that is designed to be extremely extensible through the use plugins. Plugins can be developed to provide specialized data processing logic, web services, and to enable support for different data encoding formats and databases. You can learn more and download releases at http://www.pion.org Take care, -Mike

1 0

[Review] Reminder: Proto review half way through now
by Hartmut Kaiser 09 Mar '08

09 Mar '08

Hi all, this is just a gentle reminder that currently we have the Proto review ongoing. It will last another week and will end on March 14th. We have not got enough response so far! If you're planning to submit a review, please do so soon. If you didn't have considered to submit one yet, please reconsider! Here is the initial announcement: The review of Eric Nieblers Proto library starts today, March 1st 2008, and will end on March 14th. I really hope to see your vote and your participation in the discussions on the Boost mailing lists! --------------------------------------------------- About the library: Proto is a framework for building Domain Specific Embedded Languages in C++. It provides tools for constructing, type-checking, transforming and executing expression templates. More specifically, Proto provides: * An expression tree data structure. * Operator overloads for building the tree from an expression. * Utilities for defining the grammar to which an expression must conform. * An extensible mechanism for immediately executing an expression template. * An extensible set of tree transformations to apply to expression trees. * A mechanism for giving expressions additional behaviors and members. Documentation is here: http://boost-sandbox.sourceforge.net/libs/proto Download proto.zip from here: http://www.boost-consulting.com/vault/index.php?directory=Template%20Metapro gramming Proto is a very important infrastructure library, IHMO. It has been used as the backbone for several other library writing efforts already, such as Xpressive and the rewrite of Spirit (there it has been used for all three parts: the parser, the lexer and the generator modules), and it is a key enabling technology in the long-planned unification of Phoenix and the Lambda Library. --------------------------------------------------- Please always state in your review, whether you think the library should be accepted as a Boost library! Additionally please consider giving feedback on the following general topics: - What is your evaluation of the design? - What is your evaluation of the implementation? - What is your evaluation of the documentation? - What is your evaluation of the potential usefulness of the library? - Did you try to use the library? With what compiler? Did you have any problems? - How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? - Are you knowledgeable about the problem domain? Regards Hartmut Review Manager

1 0

error: 'level' is not a member of 'boost::logging::formatter'
by Brad 09 Mar '08

09 Mar '08

Hello all, First post so be gentle with me :-) OK, I've been playing around with revision 43544 of boost::logging using the following code; #include <boost/logging/format.hpp> #include <boost/logging/format/formatter/tags.hpp> #include <boost/logging/format/destination/syslog.hpp> // uncomment if you're using Named Formatters and Destinations // #include <boost/logging/format/named_write.hpp> using namespace boost::logging; typedef boost::logging::logger_format_write< > log_type; BOOST_DEFINE_LOG(g_l, log_type) BOOST_DEFINE_LOG_FILTER(g_l_filter, boost::logging::level::holder) #define LAPP_ BOOST_LOG_USE_LOG_IF_LEVEL(g_l(), g_l_filter(), info ) int main( void ) { g_l()->writer().add_destination( destination::cout() ); g_l()->writer().add_destination( destination::syslog_no_levels() ); LAPP_ << "hi"; } when I compile it with "g++ -o syslog_test syslog_test.cpp -I/usr/include/ -lpthread" I get the following errors: /usr/include/boost/logging/format/destination/syslog.hpp:61: error: ‘level’ is not a member of ‘boost::logging::formatter’ /usr/include/boost/logging/format/destination/syslog.hpp:61: error: ‘level’ is not a member of ‘boost::logging::formatter’ /usr/include/boost/logging/format/destination/syslog.hpp:61: error: template argument 1 is invalid A quick look in boost/logging/format/formatter/tags.hpp and I see a typedef for level but no actual definition. If I change line 61 from: struct syslog : is_generic, formatter::uses_tag< formatter::level, ::boost::logging::tag::level >, boost::logging::op_equal::always_equal { to: struct syslog : is_generic, formatter::uses_tag< boost::logging::tag::level, ::boost::logging::tag::level >, boost::logging::op_equal::always_equal { It compiles and appears to work fine (I don't claim to understand the effects of this change). Forgive me if I'm missing something obvious or wasting anyones time. I'm thinking this is a bug but there's a high percentage chance it's an error on my part lol. Anyway, I'm having some great fun with boost (asio and logging so far) and appreciate the work some of you guys have put into these libs. Thanks, Brad

3 4

[mpi] Sending derived classes via MPI and serialize
by Number Cruncher 08 Mar '08

08 Mar '08

I'm trying to send polymorphic objects using boost::mpi, but I'm getting extensive "undefined reference" errors for the simple test case below. If I #include <boost/archive/text_oarchive.hpp> instead of the mpi/communicator, everything compiles fine. Any help greatly appreciated, Simon #include <boost/mpi/communicator.hpp> #include <boost/serialization/export.hpp> struct Base { virtual ~Base() {} virtual int id() const { return 1; } template<class Archive> void serialize(Archive &ar, const unsigned int) { ar & data; } int data; }; struct Derived : public Base { virtual int id() const { return 2; } }; BOOST_CLASS_EXPORT(Base) BOOST_CLASS_EXPORT(Derived) int main(int argc, char *argv[]) { Base *b = new Base; Base *d = new Derived; delete b; delete d; return 0; }

2 5

[boost graph] : trouble with the add_edge function
by Bernhard Lippmann 08 Mar '08

08 Mar '08

Hi, I use the add_edge () function to build my graph. Works almost perfect. While analysing my graph I found there have been add vertices created, I have have no idea where is is going to happen. Any helpmpossible ? I add a code snippet for the add_edge() function and my data log. vertices 12-15 are never created by me, but the are suddenly in my graph.... Best Bernhard >>>>>>>>>>>><SOURCE CODE Snippet >>>>>>>> iter = this->Elements.begin(); while(iter != this->Elements.end()) { aAtomicElement = (*iter).second; for (str_iter=aAtomicElement.AE_PinList.begin(); str_iter!= aAtomicElement.AE_PinList.end(); ++str_iter) { cout << "\n Params before call Add_edge(...) function (Bipartit Graph Type) \n "; cout << "edge [<std::string>]: "<< aAtomicElement.AE_Name << " ::" << *str_iter << " \n "; cout << "edge [<int> <int>]: "<< index_of_element( this->VertexNamesList, aAtomicElement.AE_Name) << " :: " << index_of_element( this->VertexNamesList, *str_iter) << " \n "; OneEdge.first = index_of_element( this->VertexNamesList, aAtomicElement.AE_Name); OneEdge.second = index_of_element( this->VertexNamesList, *str_iter); tie(e, inserted) = add_edge(OneEdge.first, OneEdge.second, g); if (inserted) { v = source(e, g); VertexNamesMap[v] = aAtomicElement.AE_Name ; v = target(e, g); VertexNamesMap[v] = *str_iter; EdgeNamesMap[e] = aAtomicElement.AE_Name + "-->" +*str_iter; cout << " by edge :" << EdgeNamesMap[e] << "\n"; WeightMap[e] = 1 ; } } iter ++; } // while ... <<<<<<< data log >>>>>>>>> Drücken Sie eine beliebige Taste . . . -------------------->>>>>>>>>><<<<<<<<<<------------------------- = Create the Edge Array and the Graph (V2).. Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ptrans299 ::Z edge [<int> <int>]: 0 :: 1 by edge :ptrans299-->Z Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ptrans299 ::A edge [<int> <int>]: 0 :: 2 by edge :ptrans299-->A Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ptrans299 ::vdd! edge [<int> <int>]: 0 :: 3 by edge :ptrans299-->vdd! Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ptrans299 ::vdd!s edge [<int> <int>]: 0 :: 4 by edge :ptrans299-->vdd!s Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ptrans38 ::Z edge [<int> <int>]: 5 :: 1 by edge :ptrans38-->Z Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ptrans38 ::B edge [<int> <int>]: 5 :: 6 by edge :ptrans38-->B Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ptrans38 ::vdd! edge [<int> <int>]: 5 :: 3 by edge :ptrans38-->vdd! Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ptrans38 ::vdd!s edge [<int> <int>]: 5 :: 4 by edge :ptrans38-->vdd!s Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ntrans35 ::Z edge [<int> <int>]: 7 :: 1 by edge :ntrans35-->Z Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ntrans35 ::A edge [<int> <int>]: 7 :: 2 by edge :ntrans35-->A Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ntrans35 ::net25 edge [<int> <int>]: 7 :: 8 by edge :ntrans35-->net25 Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ntrans35 ::vss!s edge [<int> <int>]: 7 :: 9 by edge :ntrans35-->vss!s Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ntrans36 ::net25 edge [<int> <int>]: 10 :: 8 by edge :ntrans36-->net25 Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ntrans36 ::B edge [<int> <int>]: 10 :: 6 by edge :ntrans36-->B Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ntrans36 ::vss! edge [<int> <int>]: 10 :: 11 by edge :ntrans36-->vss! Params before call Add_edge(...) function (Bipartit Graph Type) edge [<std::string>]: ntrans36 ::vss!s edge [<int> <int>]: 10 :: 9 by edge :ntrans36-->vss!s Drücken Sie eine beliebige Taste . . . -------------------->>>>>>>>>><<<<<<<<<<------------------------- = http://www.graphviz.org/Download_windows.php write graph wizard file ... -------------------->>>>>>>>>><<<<<<<<<<------------------------- = vertices(g) = 0 : ptrans299 1 : Z 2 : A 3 : vdd! 4 : vdd!s 5 : ptrans38 6 : B 7 : ntrans35 8 : net25 9 : vss!s 10 : ntrans36 11 : vss! 12 : 13 : 14 : 15 : Drücken Sie eine beliebige Taste . . . -------------------->>>>>>>>>><<<<<<<<<<------------------------- = edges(g) = (0,1) =ptrans299-->Z (0,2) =ptrans299-->A (0,3) =ptrans299-->vdd! (0,4) = ns299-->vdd!s (5,1) =ptrans38-->Z (5,6) =ptrans38-->B (5,3) =ptrans38-->v (5,4) =ptrans38-->vdd!s (7,1) =ntrans35-->Z (7,2) =ntrans35-->A (7,8) =n s35-->net25 (7,9) =ntrans35-->vss!s (10,8) =ntrans36-->net25 (10,6) =ntra -->B (10,11) =ntrans36-->vss! (10,9) =ntrans36-->vss!s in-edges: (1,0) (2,0) (3,0) (4,0) in-edges: (0,1) (5,1) (7,1) in-edges: (0,2) (7,2) in-edges: (0,3) (5,3) in-edges: (0,4) (5,4) in-edges: (1,5) (6,5) (3,5) (4,5) in-edges: (5,6) (10,6) in-edges: (1,7) (2,7) (8,7) (9,7) in-edges: (7,8) (10,8) in-edges: (7,9) (10,9) in-edges: (8,10) (6,10) (11,10) (9,10) in-edges: (10,11) in-edges: in-edges: in-edges: in-edges: Drücken Sie eine beliebige Taste . . . -------------------->>>>>>>>>><<<<<<<<<<------------------------- No virus found in this outgoing message. Checked by AVG. Version: 7.5.518 / Virus Database: 269.21.6/1318 - Release Date: 07.03.2008 14:01

1 0

Platform-specific Boost filesystem warning
by Caleb Gingles 08 Mar '08

08 Mar '08

(Please forgive me if this has already been discussed, I'm new to the list and wasn't able to find it.) I'm using Boost 1.34.1 under MSVC8 and am experiencing a compile warning that I thought was a bit odd. Whenever I include convenience.hpp, I and up with the following warning: d:\prgrmmng\libraries\boost_1_34_1\boost\filesystem\convenience.hpp(46) : warning C4245: 'argument' : conversion from 'int' to 'boost::filesystem::system_error_type', signed/unsigned mismatch I eventually tracked this down to the following code in path.hpp: # ifdef BOOST_WINDOWS_API typedef unsigned system_error_type; BOOST_FILESYSTEM_DECL errno_type lookup_errno( system_error_type sys_err_code ); # else typedef int system_error_type; inline errno_type lookup_errno( system_error_type sys_err_code ) { return sys_err_code; } # endif Why is system_error_type given a different type depending on the platform?

1 0

Extending Multi Array
by Klett, Stefan 07 Mar '08

07 Mar '08

Hi list members, This is a more or less a general kind of " how to extend container classes" question - I'm trying to write a class which inherits from boost::multi_array - the to get a kind of matrix class with some additional service routines. Maybe it is a lack of experience - but I for the time being I don't know how to solve the problem to access the constructor of multi_array in my own class to initialize my matrix class - my current guess was to use the "this" pointer but it had not worked out like I supposed it to do. class NetworkMultiArray: public boost::multi_array<double,3> { public: NetworkMultiArray(int); virtual ~NetworkMultiArray(); }; Here is the constructor code: NetworkMultiArray::NetworkMultiArray(int length) { this::iterator iter3; typedef this::template subarray<2>::type::iterator iter2; typedef this::template subarray<1>::type::iterator iter1; for( iter1 i = *this.begin(); iter1 != *this.end(); iter1++){ for(iter2 ii = (*i).begin(); ii != (*i).end(); ii++){ for(iter3 iii = (*ii).begin(); iii != (*ii).end(); iii++){ *iii = 0.0 ; } } } } sure this does not work - and is the result from trying to adapt the iterator example from the documentation. my aim is to handle the NetworkMultiArray like a boost::multi_array and initialize it to zero - further it would be nice if somebody could tell me how I could assign a length to the array and the subarrays. The key-point is that I want to use my class (NetworkMultiArray) like a multi_array by inheritance of the multi_array features of boost:multi_array. Thank you very much in advance. Best regards Stefan -------------------------------------------------------- Stefan Klett (Dipl. Informatiker) | E-mail: stefan.klett(a)kit.edu Forschungszentrum Karlsruhe / KIT | Web: http://www.fzk.de SCC Steinbuch Centre for Computing| Phone: +49 (0)7247 828649 Hermann-von-Helmholtz-Platz 1 | Fax: +49 (0)7247 824972 D-76344 Eggenstein-Leopoldshafen | Mobile: +49 (0)176 20317250 -------------------------------------------------------------------

3 2

[python] redirecting PyErr_Print()
by Robert Dailey 07 Mar '08

07 Mar '08

Hi, Right now when an exception occurs in boost.python, I simply call PyErr_Print() to print the message to a console window. However, I would like to be able to have the option of redirecting the output of PyErr_Print() to a string, file, or any other ostream interface compatible object I choose. Is there an easy way to do this (possibly using boost)? My searching on the internet has not really shown any useful results. The answers I've seen involve creating pipes, which I don't want to do because it is non trivial. I was hoping boost could shine in this area since it seems to be a common issue.

2 2

ASIO: ssl - load_verify_file
by j.c. 07 Mar '08

07 Mar '08

Hello, I have implemented a TLS client/server application and will be using self-assigned certificates due to the small scale of distribution. I am currently using the function load_verify_file("ca.pem"), however I don't want to write the certificate to end-users disk. What would be the proper way to use an "in-memory or compiled" certificate for peer verification? Thanks, JC

2 4

boost::function "could not deduce template argument ..."
by Derrick Hathaway 07 Mar '08

07 Mar '08

I apologize if this isn't the sort of question this list is intended for, but if anyone could help me with my lack of sufficient template howto skill I would appreciate it. Essentially what I have is class template for boost::function1<bool, const ValueType &> like so: template <typename ValueType> class predicate { public: typedef boost::function1<bool, const ValueType&> type; struct and { bool operator()(const ValueType &)() { return left_() && right(); } type left_; type right_; }; struct or { ... }; }; And what I want is to overload the & and | operators for predicate<ValueType>::type like so: template <typename ValueType> typename predicate<ValueType>::type operator &( const typename predicate<ValueType>::type &left, const typename predicate<ValueType>::type &right) { return typename predicate<ValueType>::and(left, right); } The problem is when I compile I get the error message "could not deduce template argument for 'ValueType'" when I compile. Any idea what I'm doing wrong? I have attached example code. I am using MS Visual Studio 8, and boost 1.34.1. Thanks in advance. -Derrick

2 1

automake + boost lib versions
by Klett, Stefan 07 Mar '08

07 Mar '08

Hi altogether, I've got a problem with rolling a packet to distribute a library source - first I tried to do this with boost-build , but later on I had some difficulties and fell back to automake. What I need is a (hopefully convenient) way to deal with different versions of the boost libraries - because I have to expect that the names of these libraries will differ on nearly all machines a potential User of "my" library is trying to build the source. For example the date-time lib appears as: /usr/local/lib/libboost_date_time-gcc42-1_34_1.a /usr/local/lib/libboost_date_time-gcc42-1_34_1.so /usr/local/lib/libboost_date_time-gcc42-1_34_1.so.1.34.1 /usr/local/lib/libboost_date_time-gcc42.a /usr/local/lib/libboost_date_time-gcc42-d-1_34_1.a /usr/local/lib/libboost_date_time-gcc42-d-1_34_1.so /usr/local/lib/libboost_date_time-gcc42-d-1_34_1.so.1.34.1 /usr/local/lib/libboost_date_time-gcc42-d.a /usr/local/lib/libboost_date_time-gcc42-d.so /usr/local/lib/libboost_date_time-gcc42-mt-1_34_1.a /usr/local/lib/libboost_date_time-gcc42-mt-1_34_1.so /usr/local/lib/libboost_date_time-gcc42-mt-1_34_1.so.1.34.1 /usr/local/lib/libboost_date_time-gcc42-mt.a /usr/local/lib/libboost_date_time-gcc42-mt-d-1_34_1.a /usr/local/lib/libboost_date_time-gcc42-mt-d-1_34_1.so /usr/local/lib/libboost_date_time-gcc42-mt-d-1_34_1.so.1.34.1 /usr/local/lib/libboost_date_time-gcc42-mt-d.a /usr/local/lib/libboost_date_time-gcc42-mt-d.so /usr/local/lib/libboost_date_time-gcc42-mt.so /usr/local/lib/libboost_date_time-gcc42.so in the case of my library using the multithreaded version is preferred. Hardwiring fails by the obvious reason that not everyone else is using gcc42 Is there anyone of you who has some experience in writing a proper configure.ac Makefile.am that is aware of these different boost-library names ? If so please give me a hint ... Thank you very much in advance Best regards Stefan -------------------------------------------------------- Stefan Klett (Dipl. Informatiker) | E-mail: stefan.klett(a)kit.edu Forschungszentrum Karlsruhe / KIT | Web: http://www.fzk.de SCC Steinbuch Centre for Computing| Phone: +49 (0)7247 828649 Hermann-von-Helmholtz-Platz 1 | Fax: +49 (0)7247 824972 D-76344 Eggenstein-Leopoldshafen | Mobile: +49 (0)176 20317250 -------------------------------------------------------------------

2 1

Please help: Seg fault with threads
by Nishant Mittal 07 Mar '08

07 Mar '08

Hi All, I started on boost today and wrote my first hello world application. #include <boost/thread/thread.hpp> #include <iostream> using namespace std; void hello_world() { cout << "Hello world, I'm a thread!" << endl; } int main(int argc, char* argv[]) { boost::thread my_thread(&hello_world); my_thread.join(); return 0; } I compiled it using the command. g++ helloworld.cpp -lboost_thread-gcc41-mt-1_34_1 However, when I try to run it, I keep getting a segmentation fault. I tried to debug with gdb and this is what I get. (gdb) run Starting program: boost_test/a.out (no debugging symbols found) (no debugging symbols found) (no debugging symbols found) (no debugging symbols found) (no debugging symbols found) (no debugging symbols found) (no debugging symbols found) (no debugging symbols found) [Thread debugging using libthread_db enabled] [New Thread 46912498370912 (LWP 21199)] [New Thread 1084229952 (LWP 21202)] Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 1084229952 (LWP 21202)] 0x00002aaaaaab4932 in boost::thread_group::add_thread () from /usr/local/lib/libboost_thread-gcc41-mt-1_34_1.so.1.34.1 (gdb) Please let me know as to what I am doing wrong. Any help is appreciated. Thanks Nishant

2 2

[spirit] Segmentation fault when parsing grammar with threads
by Andreas Bruckmeier 06 Mar '08

06 Mar '08

Hi out there, after searching for the cause of segmentation faults in my program i figured out that it happens while parsing my grammar with spirit. But this happens only if i run multiple threads, with only one thread all works as expected. I used the current boost trunk, gcc 4.1.2 and option D_REENTRANT Does anybody have a clue what happens inside parse(...) that could cause this segfault? Best regards Andi calling code: ('buf' is a zero-terminated string) -------------------------------------------------------- HttpRequestGrammar parser; parse_info<const char*> parserInfo = parse(buf, parser); my grammar: (cutted some rules to limit length ;-)) -------------------------------------------------------- #ifndef BASIC_HTTP_GRAMMAR_H_ #define BASIC_HTTP_GRAMMAR_H_ #include <boost/spirit/core.hpp> #include <boost/spirit/actor/assign_actor.hpp> #include <boost/spirit/actor/insert_at_actor.hpp> using namespace boost::spirit; struct HttpRequestGrammar : public grammar<HttpRequestGrammar> { template <typename ScannerT> struct definition { definition(HttpRequestGrammar const& self) { first = ( request = *( SP | CRLF ) >> requestLine >> CRLF >> *(( generalHeader | requestHeader | entityHeader ) >> CRLF) >> CRLF, requestLine = method[insert_at_a(self.headerMap, "method")] >> SP >> requestUri[insert_at_a(self.headerMap, "url")] >> SP >> httpVersion[insert_at_a(self.headerMap, "version")], method = str_p("GET") | "HEAD", ... .. token = +graph_p, SP = str_p(" "), CRLF = str_p("\r\n") ); } subrule<0> request; subrule<1> requestLine; subrule<2> generalHeader; ... .. subrule<1000> SP; subrule<1001> CRLF; rule<ScannerT> first; rule<ScannerT> const& start() const { return first; } }; mutable std::map<std::string, std::string> headerMap; }; #endif /*BASIC_HTTP_GRAMMAR_H_*/

2 1

Re: [Boost-users] [bind] Template deduction
by Robert Dailey 06 Mar '08

06 Mar '08

On Tue, Mar 4, 2008 at 7:16 PM, Marshall Clow <marshall(a)idio.com> wrote: > > Would this work? > std::for_each( myStrings.begin(), myStrings.end(), boost::bind( > &DoFoo<std::string>, 5, _1 ) ); Well, the example I gave was probably overly simple. The real example uses a boost::python::list, which can either take a char* or a std::string. At the time I'm doing the boost::bind, I do not know what type is being passed in.

4 6

basename function in filesystem
by Alain Leblanc 06 Mar '08

06 Mar '08

Hi, Here's the description of the basename() function in the Filesystem library: template <class Path> typename Path::string_type basename(const Path & p); Returns: if p.leaf() contains a dot, returns the substring of p.leaf() starting at its beginning and ending at the last dot (the dot is not included). Otherwise, returns p.leaf() and if I run the following program ================================================== #include <string> #include <iostream> #include<boost/filesystem/operations.hpp> namespace bf = boost::filesystem; int main() { string name("/calvin/hobbes/xx.xml"); bf::path filepath(name); cerr << "Value for basename: " << basename(filepath.string().c_str()) << endl; } ================================================== I get as a result: Value for basename: xx.xml I seems like I should be getting 'xx'. Am I not understanding the description, or is there a problem with the library. a

3 3

[boost.python] howto expose ptr_vector?
by Jörg Becker 06 Mar '08

06 Mar '08

Hello everyone. I have to expose a boost::ptr_vector. I'm wondering if I can use the indexing suite. But neither the docu nor google give me an answer. Are there any examples for the indexing_suite using a boost::ptr_vector or any other custom (non-stl) container? Thanks, Jörg

5 5

[multi-index] question for a complex query
by Ovanes Markarian 06 Mar '08

06 Mar '08

Hello *, I currently need to implement the following use case and was wondering if this is possible with multi-index: I have a class, for simplicity all members are public wihtout accessors and mutators: class entry { public: field x; field y; filed z; }; I need a multi-index index to remember the order in which the elements were inserted and non uniquely index the inserted elements by hash of field x; Now a client could do the following queries: - get all entries in the order they were inserted (this is easy and I know how to do it) - get all entries which satisfy field x parameter in the order they were inserted. I know that I can retrieve the values dependent on hash(x), but these are probably not sorted. I know that I can project iterators, but can I project (range_retireved_via_hashed_X) to (range_retrieved_for_sequence_of_X) May be I miss smth here or should split my data in some other way to satisfy this condition. With Kind Regards, Ovanes Markarian

2 2

Please help: Getting started with Boost
by Nishant Mittal 06 Mar '08

06 Mar '08

I have a 64 bit red hat linux (also 64 bit) box. 1) I downloaded boost from boost_1_34_1.tar.bz2 <http://downloads.sourceforge.net/boost/boost_1_34_1.tar.bz2?modtime=1185241 108&big_mirror=0> 2) Unizipped and installed it (./configure , make install ) everything worked fine. Questions: 1) How do I check if I now have the 64 bit version of boost? 2) I see that all libraries were put into /usr/local/lib and I can compile my hello world code with the following command. * $ g++ hello.cpp -lboost_thread-gcc41-mt-1_34_1 but when I try to run the created a.out file I get a file not found error msg. * $ ./a.out * ./a.out: error while loading shared libraries: libboost_thread-gcc41-mt-1_34_1.so.1.34.1: cannot open shared object file: No such file or directory I did an ldd and this is the output. $ ldd a.out libboost_thread-gcc41-mt-1_34_1.so.1.34.1 => not found libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x0000003a6aa00000) libm.so.6 => /lib64/libm.so.6 (0x0000003a5a400000) libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003a68600000) libc.so.6 => /lib64/libc.so.6 (0x0000003a5a000000) /lib64/ld-linux-x86-64.so.2 (0x0000003a59c00000) I am stuck and cannot make progress. I appreciate any help on this. Thanks Nishant

2 3

[BGL] vertex_descriptors in STL containers
by Torsten Sadowski 06 Mar '08

06 Mar '08

Hi, I have written a program that works if I use vecS for the vertices and fails often with a crash when I use listS. vecS vertex descriptors are effectivly int so they pose no problem when used in std::set and std::map but listS vertex descriptors are of type void*. Could it be that comparison fails in the sets or could I have problems with a copy constructor somewhere? I know that STL is not designed to handle pointers but in my case the pointers could just be handled for their address value. The graph is not changed during my calculations. Cheers, Torsten

1 0

negating a functor in a remove_copy_if
by PJ Durai 06 Mar '08

06 Mar '08

Hello everyone, I couldn't figure out how to use a logical negation in the following situation. struct IsConditionValid : public unary_function<Event, bool> { public: bool operator() (const Event& event)const {} }; remove_copy_if(events.begin(), events.end(), back_inserter(result), IsConditionValid()); <-- how to negate the condition object? What I really need is '! IsConditionValid()'. How can it be done using may be boost::bind ? appreciate your time. thanks pj

2 2

Boost.Math.StatisticalDistributions
by johneddy101＠comcast.net 06 Mar '08

06 Mar '08

Hello, I realize that this library is not yet part of the boost distribution but I am using it and have come accross an issue. I am concerned that the logic in the various check functions may be flawed. Take for example the check_uniform function. The logic is as follows: if lower Ok && upper Ok && lower < upper return true else raise error stating that lower must be less than upper return false end if The functions used to determine if lower and upper are ok will raise errors if appropriate. If the policy is such that raising an error does not cause a throw, then control will return to the check_uniform method with an indication that lower or upper is not ok and we will enter the else block. Herein lies the problem. Consider the following scenario: creating a uniform distribution with: lower = 0.0 upper = postitive infinity Check upper will fail and send a message about the infinity. Enter the else block. A message will be raised that states that the lower parameter is not less than the upper. This is my concern. I believe the second message is unnecessary and potentially incorrect/misleading. Perhaps logic like shown below would be more appropriate: if lower not Ok || upper not Ok then return false else if lower >= upper raise error stating that lower must be less than upper return false else return true end if Thanks, John

3 2

[regex] Question about pattern
by office＠mgs.co.at 06 Mar '08

06 Mar '08

Hi; I'm a newbie to regex patterns and need help in a relative simple task: I use boost::regex with perl syntax and I have to parse user input that provides a feature similar to the conditional formatting of cells in OpenOffice Calc. The string the user enters looks like this: >=30 [fg:red] [bg:white] or <0.0 [fg:none] [bg:transparent] First the user can enter an optional operator (> < <> = <= >=) followed by a integer or floating point number. This whole term is optional so [fg:red] [bg:white] is also a valid expression. The terms for color selection are partly optional, so valid expressions are [fg:red] or [bg:white] or [fg:red][bg:white] or [bg:white][fg:red] The key words for foreground and background colors are predefined by the software (red, green, blue, transparent, none, ...). I tried starting with a pattern like (C++ syntax for strings) ^(?:(<|<=|>|>=|=|<>){1}((?:-|\\+)?[0-9]+(?:\\.[0-9]+|\\,[0-9]+)?))?(?:\\s*)(?:(\\[FG:(?:BLUE|RED|GREEN|BLACK|YELLOW|WHITE|CYAN|NONE)\\])|(\\[BG:(?:BLUE|RED|GREEN|BLACK|YELLOW|WHITE|CYAN)\\])|(\\[FG:(?:BBLUE|RED|GREEN|BLACK|YELLOW|WHITE|CYAN|NONE)\\])(?:\\s*)(\\[BG:(?:BLUE|RED|GREEN|BLACK|YELLOW|WHITE|CYAN)\\])){1}$ But this does not allow the [fg:][bg:] terms to be interchanged and also when a new color or style will be added to the format class I have to change the pattern three times. I tried backward references with no success. So any help is very welcome Thanks in advance Martin

4 3

including boost/thread.hpp gives compile error under VS7 in utility\base_from_member.hpp
by jason72＠internode.on.net 06 Mar '08

06 Mar '08

Using Visual Studio 2003 (VS7) and boost 1.34.1, I have simply declared the following code and I get the resulting errors: Code: #pragma once #include <deque> #include <boost/thread.hpp> using namespace std; <SNIP> Compiler output: cl /c /W3 /G6 /GF /Gy /nologo /DNDEBUG /DWIN32 /D_WIN32 /D_WIN32_WINNT=0x0500 /DWINVER=0x0500 /D_WIN32_IE=0x060 0 /D_AFXDLL /D_WTL_NO_CSTRING /D_WTL_NO_WTYPES /D_WTL_NO_UNION_CLASSES -D_X86_=1 /Ox /Z7 /I\src\r870\develop\work\pcd m\std\include /DNT /Dpcdm /DDBREL=870 /D_WIN32_DCOM -GX /DREGISTER_PROXY_DLL /GR /EHsc /MD /Fohtsserver.obj htsserver.cpp.cpp htsserver.cpp.cpp c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2143: syntax error : missing ',' before 'constant' c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(78) : see reference to class template instantiation 'boost::base_from_member<MemberType,UniqueID>' being compiled c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2226: syntax error : unexpected type 'T0' c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2334: unexpected token(s) preceding ':'; skipping apparent function body c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2143: syntax error : missing ',' before 'constant' c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2226: syntax error : unexpected type 'T0' c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2334: unexpected token(s) preceding ':'; skipping apparent function body c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2143: syntax error : missing ',' before 'constant' c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2226: syntax error : unexpected type 'T0' c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2334: unexpected token(s) preceding ':'; skipping apparent function body c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2143: syntax error : missing ',' before 'constant' c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2226: syntax error : unexpected type 'T0' c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2334: unexpected token(s) preceding ':'; skipping apparent function body c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2143: syntax error : missing ',' before 'constant' c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(76) : error C2226: syntax error : unexpected type 'T0' c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(78) : error C2143: syntax error : missing ';' before '}' c:\apps\boost_1_34_1\boost\utility\base_from_member.hpp(78) : error C2238: unexpected token(s) preceding ';' c:\apps\VS .NET 2003\Vc7\include\ostream(604) : fatal error C1903: unable to recover from previous error(s); stopping compilation NMAKE : fatal error U1077: 'cl' : return code '0x2' Stop. Note that I havent declared or used any of the threading or mutex objects yet. It is not possible to upgrade compiler version for this project. Regards, Jason

2 1

Re: [Boost-users] link problem: boost + stlport + msvc8
by John Maddock 06 Mar '08

06 Mar '08

CHABO Gabriel wrote: > When I tried to link, I got an error saying that > libboost_program_options-vc80-mt-gdp-1_34_1.lib could not be found, > so I had to build it. > > I edited the user-config.jam file to add the following line: > > using stlport : : D:/Program Files/STLport-5.1.5 > D:/Program Files/STLport-5.1.5/lib ; Is that correct, or is "D:/Program Files/STLport-5.1.5 D:/Program Files/STLport-5.1.5/lib" being interpretted as a *single* path with spaces in it? I don't think you need the D:/Program Files/STLport-5.1.5/lib part in there - but I could be wrong! If all else fails try building program_options from your IDE as a static library project using the same build options as your .exe: then you just have to define BOOST_ALL_NO_LIB in your application project to disable auto-linking, and set the static lib project as a dependency of the .exe. HTH, John.

2 1

Re: [Boost-users] link problem: boost + stlport + msvc8
by CHABO Gabriel 06 Mar '08

06 Mar '08

I also added "D:\Program Files\boost\boost_1_34_1" to the list of Additional Include Directives. Any ideas about what could be causing this? ________________________________ De : CHABO Gabriel Envoyé : mercredi 5 mars 2008 17:57 À : boost-users(a)lists.boost.org Objet : link problem: boost + stlport + msvc8 Hi, This is my first post to the mailing list, and I hope I'm not bringing up a silly issue but I've been over this a million times already and I still can't figure it out, so any help is greatly appreciated. This is my setup: Windows XP SP2 Visual Studio 2005 STLport-5.1.5 boost_1_34_1 I'm trying to write a tiny program, just to get stlport and boost to play nice together and I still have "unresolved external symbol" errors. I downloaded stlport-5.1.5 and built it according to the instructions: * configure.bat -c msvc8 * nmake /f msvc.mak * nmake /f msvc.mak install I also added stlport\bin to my path Next, I downloaded the boost_1_34_1 windows installer and checked all the options to get all the libraries and added it to my path. Next, I configured visual studio 2005 as follows: Tools -> Options -> Project and Solutions -> VC++ Directories -> Show directories for: Include Files: Add the path to stlport headers (D:\Program Files\STLport-5.1.5\stlport) Library Files: Add the path to stlport libs (D:\Program Files\STLport-5.1.5\lib) Next, on the project level, I Added __STL_DEBUG to the list of preprocessors. I'm trying to build a Multi-threaded Debug DLL (/MDd). I also set the (/Zc:wchar_t-) option. When I tried to link, I got an error saying that libboost_program_options-vc80-mt-gdp-1_34_1.lib could not be found, so I had to build it. I edited the user-config.jam file to add the following line: using stlport : : D:/Program Files/STLport-5.1.5 D:/Program Files/STLport-5.1.5/lib ; This is the command I used to build the new lib bjam --toolset=msvc-8.0 link=static stdlib=stlport threading=multi cxxflags="-Zc:wchar_t-" --with-program_options -a -d2 I built the lib and moved it from bin.v2 to lib. As you can see I took every precaution with wchar_t so that all the libs are compatible, and still every time I try to link the simple program I get this error: error LNK2019: unresolved external symbol "public: __thiscall boost::program_options::options_description::options_description(class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> > const &,unsigned int)" (??0options_description@program_options@boost@@QAE@ABV?$basic_string@DV?$char_traits@D@stlpd_std@@V?$allocator@D@2@@stlpd_std@@I@Z) referenced in function _main This is the simple program in question #include <iostream> #include <boost/program_options.hpp> int main(int argc, char* argv[]) { std::cout<<"boost stlport test\n"; boost::program_options::options_description desc("Allowed options"); } Any help is greatly appreciated Thx Gabriel ******************************* This e-mail contains information for the intended recipient only. It may contain proprietary material or confidential information. If you are not the intended recipient you are not authorised to distribute, copy or use this e-mail or any attachment to it. Murex cannot guarantee that it is virus free and accepts no responsibility for any loss or damage arising from its use. If you have received this e-mail in error please notify immediately the sender and delete the original email received, any attachments and all copies from your system.

1 0

[iostream] Overloaded bitshift operators
by Robert Dailey 05 Mar '08

05 Mar '08

Does the Boost.Iostreams library have overloaded bitshift operators? That way I could do: boost::iostreams::stream<myclass> theOutputStream; theOutputStream << MyData;

2 4

byte streams
by Ashkan Aliabadi 05 Mar '08

05 Mar '08

Hello everybody, I want a stream view of a dynamically allocated BYTE* buffer I have at hand. At first I thought boost::iostreams::basic_array< BYTE > would do the job since they're the closest thing I found in Boost IOStreams library, but as it turns out I was wrong, since the code fails to compile with dynamically allocated buffers. typedef boost::iostreams::basic_array< unsigned char > MemoryDevice; typedef boost::iostreams::stream< MemoryDevice > MemoryStream; BYTE* mem = new BYTE[ 1000 ]; MemoryDevice memoryDevice( mem ); MemoryStream memoryStream( memoryDevice ); I was wondering if there are any available streams that are capable of providing stream-like behavior to such buffers, or should I write a device to handle them? Any help is greatly appreciated.

1 0

boost serialization: toString/fromString methods
by Christian Widmer 05 Mar '08

05 Mar '08

Dear group, I am trying to provide generic toString/fromString methods (to provide an interface to SWIG/Python serialization), which I'd like to implement in a base class CSGObject (from which all other classes are derived), such that the correct serialization code is called each time. After a bit of fiddling around (and with the help of the archive of this mailing list) I've got the toString method to work. However, things don't seem to be as straight for the fromString method. The following code illustrates what I'd like to do: virtual std::string toString() const { std::ostringstream s; boost::archive::text_oarchive oa(s); oa << this; return s.str(); } virtual void fromString(std::string str) { std::istringstream is(str); boost::archive::text_iarchive ia(is); //cast away constness CSGObject* tmp = const_cast<CSGObject*>(this); ia >> tmp; *this=*tmp; } However, although the correct serialization methods get called, only the information contained in the base class gets restored correctly, but none of the fields in any derived classes. My C++ is quite rusty, but I believe this is because *this is not a pointer and is thus statically bound. I hope there is a solution to this - how would you implement a fromString method like this? Is this even possible? What are the alternatives? Hints would be appreciated! Thank you, Chris

1 0

[iostreams] Inconsistency b/w docs and code of stream()
by Nitay Joffe 05 Mar '08

05 Mar '08

>> > Nitay Joffe wrote: >> > Hey guys, >> > >> > I'm working with the boost::iostreams library to create a stream object >> > from >> > a Device class I've implemented. I'm trying to call the constructor that >> > allows setting of the buffer size and it is failing to compile on 64 bit. >> > >> > I used the documenation at >> > http://www.boost.org/libs/iostreams/doc/guide/generic_streams.html#stream >> > >> > The docs say the constructor is of the form: >> > >> > stream(const T& t, >> > std::streamsize buffer_size = default_value, >> > std::streamsize pback_size = default_value); >> > >> > >> > My code to create the stream looks like: >> > >> > MyDevice myDevice(...) >> > MyStream(myDevice, (std::streamsize)500); >> > >> > >> > On a 32 bit machine this works fine, but on a 64 bit one it does not >> > compile. The parameters I'm passing in are not matching up with a > > Would you please post the compiler errors? > >> > Thanks, >> > -n Sure, here is sample code that causes the error: #include <iosfwd> #include <boost/iostreams/categories.hpp> #include <boost/iostreams/stream.hpp> struct MyDevice { typedef char char_type; typedef boost::iostreams::source_tag category; std::streamsize read(char *s, std::streamsize n) { return n; } }; typedef boost::iostreams::stream<MyDevice> MyStream; int main() { MyDevice d; MyStream s(d, (std::streamsize)500); return 0; } And here are the compile errors: g++ a.cc k/usr/include/boost/iostreams/stream.hpp: In constructor 'boost::iostreams::stream<Device, Tr, Alloc>::stream(U100&, const U0&) [with U100 = MyDevice, U0 = std::streamsize, Device = MyDevice, Tr = std::char_traits<char>, Alloc = std::allocator<char>]': a.cc:18: instantiated from here /usr/include/boost/iostreams/stream.hpp:110: error: no matching function for call to 'MyDevice::MyDevice(MyDevice&, const long int&)' a.cc:5: note: candidates are: MyDevice::MyDevice() a.cc:5: note: MyDevice::MyDevice(const MyDevice&) make: *** [all] Error 1 If I change the (std::streamsize) to (int) it compiles. Cheers, -n

2 1

link problem: boost + stlport + msvc8
by CHABO Gabriel 05 Mar '08

05 Mar '08

Hi, This is my first post to the mailing list, and I hope I'm not bringing up a silly issue but I've been over this a million times already and I still can't figure it out, so any help is greatly appreciated. This is my setup: Windows XP SP2 Visual Studio 2005 STLport-5.1.5 boost_1_34_1 I'm trying to write a tiny program, just to get stlport and boost to play nice together and I still have "unresolved external symbol" errors. I downloaded stlport-5.1.5 and built it according to the instructions: * configure.bat -c msvc8 * nmake /f msvc.mak * nmake /f msvc.mak install I also added stlport\bin to my path Next, I downloaded the boost_1_34_1 windows installer and checked all the options to get all the libraries and added it to my path. Next, I configured visual studio 2005 as follows: Tools -> Options -> Project and Solutions -> VC++ Directories -> Show directories for: Include Files: Add the path to stlport headers (D:\Program Files\STLport-5.1.5\stlport) Library Files: Add the path to stlport libs (D:\Program Files\STLport-5.1.5\lib) Next, on the project level, I Added __STL_DEBUG to the list of preprocessors. I'm trying to build a Multi-threaded Debug DLL (/MDd). I also set the (/Zc:wchar_t-) option. When I tried to link, I got an error saying that libboost_program_options-vc80-mt-gdp-1_34_1.lib could not be found, so I had to build it. I edited the user-config.jam file to add the following line: using stlport : : D:/Program Files/STLport-5.1.5 D:/Program Files/STLport-5.1.5/lib ; This is the command I used to build the new lib bjam --toolset=msvc-8.0 link=static stdlib=stlport threading=multi cxxflags="-Zc:wchar_t-" --with-program_options -a -d2 I built the lib and moved it from bin.v2 to lib. As you can see I took every precaution with wchar_t so that all the libs are compatible, and still every time I try to link the simple program I get this error: error LNK2019: unresolved external symbol "public: __thiscall boost::program_options::options_description::options_description(class stlpd_std::basic_string<char,class stlpd_std::char_traits<char>,class stlpd_std::allocator<char> > const &,unsigned int)" (??0options_description@program_options@boost@@QAE@ABV?$basic_string@DV? $char_traits@D@stlpd_std@@V?$allocator@D@2@@stlpd_std@@I@Z) referenced in function _main This is the simple program in question #include <iostream> #include <boost/program_options.hpp> int main(int argc, char* argv[]) { std::cout<<"boost stlport test\n"; boost::program_options::options_description desc("Allowed options"); } Any help is greatly appreciated Thx Gabriel ******************************* This e-mail contains information for the intended recipient only. It may contain proprietary material or confidential information. If you are not the intended recipient you are not authorised to distribute, copy or use this e-mail or any attachment to it. Murex cannot guarantee that it is virus free and accepts no responsibility for any loss or damage arising from its use. If you have received this e-mail in error please notify immediately the sender and delete the original email received, any attachments and all copies from your system.

2 2

multi_array : boost::extents< is not a type
by Klett, Stefan 05 Mar '08

05 Mar '08

Hi List Members, While still trying putting boost::multi_array to work I ran into the next obstacle - my current code is fairly like in the multi_array "short example" That is : #include "boost/multi_array.hpp" class NwLayer { typedef boost::multi_array<double,3> neural_op; typedef neural_op::index index ; neural_op NeuralOperator(boost::extents[10][10][10]); } unfortunately I still get the compile time error In file included from ../NwLayer.cpp:1: ../NwLayer.h:12: Fehler: >boost::extents< is not a type on the last line of the above code snippet Is there anyone around who could explain to me what I can do to get rid of the error message ? Many thanks in advance Best regards Stefan -------------------------------------------------------- Stefan Klett (Dipl. Informatiker) | E-mail: stefan.klett(a)kit.edu Forschungszentrum Karlsruhe / KIT | Web: http://www.fzk.de SCC Steinbuch Centre for Computing| Phone: +49 (0)7247 828649 Hermann-von-Helmholtz-Platz 1 | Fax: +49 (0)7247 824972 D-76344 Eggenstein-Leopoldshafen | Mobile: +49 (0)176 20317250 -------------------------------------------------------------------

2 1

Boost.MPI - compilation problems
by Tom Smith 05 Mar '08

05 Mar '08

Hi, I seem to be having similar problems to this post: http://lists.boost.org/boost-users/2007/10/31648.php My MPI implementation is MPICH2; the first example in the docs at http://www.osl.iu.edu/~dgregor/boost.mpi/doc/mpi/tutorial.html works fine (this just creates a communicator and prints each process' rank). The second example in the tutorial (with recv and send): #include <boost/mpi.hpp> #include <iostream> #include <boost/serialization/string.hpp> namespace mpi = boost::mpi; int main(int argc, char* argv[]) { mpi::environment env(argc, argv); mpi::communicator world; if (world.rank() == 0) { world.send(1, 0, std::string("Hello")); std::string msg; world.recv(1, 1, msg); std::cout << msg << "!" << std::endl; } else { std::string msg; world.recv(0, 0, msg); std::cout << msg << ", "; std::cout.flush(); world.send(0, 1, std::string("world")); } return 0; } fails to link: output on g++ 4.0.1 on OSX 10.5 is Undefined symbols: "boost::mpi::communicator::operator int() const", referenced from: boost::mpi::status boost::mpi::communicator::recv_impl<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >(int, int, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&, mpl_::bool_<false>) constin ccxddhyu.o void boost::mpi::communicator::send_impl<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >(int, int, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, mpl_::bool_<false>) constin ccxddhyu.o ld: symbol(s) not found My compiled invocation (which as mentioned compiles the first tutorial example) is just mpic++ -lboost_mpi-mt -lboost_serialization-mt main.cpp The problem (as for the person in the post I linked at the top) seems to be that mpi::communicator defines a conversion operator to MPI_Comm, which is just a typedef for int in MPICH2, but somehow the correct operator isn't found in the compiled lib.. Unlike the person in the linked post, I haven't had any other MPI libraries installed before, so there should be no inconsistencies. This problem occurs with 32 and 64-bit compiled libs built from subversion repos. code today. Thanks Tom

1 0

[regex] How to include named charact class [[:xdigit:]] in user defined character class
by Chandan Nilange 05 Mar '08

05 Mar '08

Hello, I want to include named character class [[:xdigit:]] as a part of another user defined character class. I am not getting the desired results. Pl. find my test example attached. Please let me know how to do this. Regards, Chandan ____________________________________________________________________________________ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs

2 1

Re: [Boost-users] Extending Multi Array
by Lang Stefan 05 Mar '08

05 Mar '08

Sorry folks for resending, but I forgot to change the subject line as appropriate when I first replied to the digest. My bad... For the sake of the initial poster (and anyone else interested in this issue) to help him spot my response, below is a copy of that initial reply. I cut away the rest of the digest as well as the original request that I did quote originally, to keep redundancy to a minimum. > Hi Stefan, > > My first guess would be to use initializers, as in > > NetworkMultiArray::NetworkMultiArray(int length) > : boost::multi_array<double,3>( ... ) > { > ... > } > > You shouldn't need to explicitly use the this keyword unless you are > using an obscure compiler and certain syntactically obscure > constructs. > However, if you want to refer to the methods of a superclass that you > have overridden in your own class, use this class's name as a > qualifier, > e. g. if you have a method 'begin()' for your own class that overrides > the 'multi_array::begin()' method, you will need to write > > boost::multi_array<double, 3>::begin(); > > Usually, when you try to extend an existing class it is a good idea to > create a typedef for your superclass, so it's easier to refer to it's > methods. In your case define a typdef like this: > > typedef boost::multi_array<double, 3> super; > > If you do that, you can forward calls to method overrides of your own > class to the baseclass by simply calling super::{_methodname_(...)}. E. > g. the above call would be reduced to > > super::begin(); > > Note that some methods cannot be overriden, such as the copy > constructors or assignment operators, so you will need to provide those > for your own class and explicitely call the base class methods inside: > > NetworkMultiArray& NetworkMultiArray::operator=(const NetworkMultiArray& other) > { > super::operator=(other); // explicit use of operator= neccessary here! > // copy extended stuff here > // ... > return *this; > } > > > Hope this helps! > > Regards, > Stefan (another one)

1 0

[foreach][range] How would BOOST_REVERSE_FOREACH be implemented?
by Pete Bartlett 05 Mar '08

05 Mar '08

Boost.Foreach is such a great piece of kit that once you start using it you just can't stop. Indeed I like working directly with values rather than iterators so much that is feels normal for me to write something like BOOST_FOREACH( value_type x , make_iterator_range( rbegin( seq ) , rend( seq ) ) whenever I wish to reverse iterate over a sequence. My co-workers are not big fans of typing though, so they want a REVERSE_FOREACH. At first naïve glance it looks easy to implement in terms of the original FOREACH: template<typename C> inline iterator_range</* something */> make_reverse_iterator_range(C& c) { return make_iterator_range( rbegin(c) , rend(c) ); } #define REVERSE_FOREACH( x , container ) BOOST_FOREACH( x , make_reverse_iterator_range( container ) ) This works fine when container is an lvalue. But then co-workers, used to the wonders of the original FOREACH, inevitably start to use the new macro with rvalues and get a crash due to dangling references (- the iterator_range's members point to departed quantities.....) and if you could somehow work around that, there is the issue hidden inside the "/* something */" that you have to cope with fact that MSVC has no proper const rvalue detection. Finally the #define MACRO(x,y) ANOTHER_MACRO( f(x) , g(y) ) style is not recommended because they are brittle in the face of x and/or y themselves being macros. ... but all these issues are exactly the ones that BOOST_FOREACH itself solves! Thus surely it is technically possible to write a REVERSE_FOREACH that works with rvalues as well as lvalues, e.g. by essentially copying and pasting the FOREACH implementation and replacing "begin" and "end" by "rbegin" and "rend" in the vital places. However one feels there may be a better way... has anyone had a go at creating a "fully-functional" REVERSE_FOREACH and could offer me any advice? If indeed the task is fairly intricate and requires re-use of foreach internals, would the library author consider including something in the library itself? Many thanks for reading, Pete Bartlett

4 6

Re: [Boost-users] Boost-users Digest, Vol 1561, Issue 2
by Lang Stefan 05 Mar '08

05 Mar '08

Hi Stefan, My first guess would be to use initializers, as in NetworkMultiArray::NetworkMultiArray(int length) : boost::multi_array<double,3>( {enter appropriate constructor parameters here} ) { ... } You shouldn't need to explicitly use the this keyword unless you are using an obscure compiler and certain syntactically obscure constructs. However, if you want to refer to the methods of a superclass that you have overridden in your own class, use this class's name as a qualifier, e. g. if you have a method 'begin()' for your own class that overrides the 'multi_array::begin()' method, you will need to write boost::multi_array<double, 3>::begin(); Usually, when you try to extend an existing class it is a good idea to create a typedef for your superclass, so it's easier to refer to it's methods. In your case define a typdef like this: typedef boost::multi_array<double, 3> super; If you do that, you can forward calls to method overrides of your own class to the baseclass by simply calling super::{_methodname_(...)}. E. g. the above call would be reduced to super::begin(); Note that some methods cannot be overriden, such as the copy constructors or assignment operators, so you will need to provide those for your own class and explicitely call the base class methods inside: NetworkMultiArray& NetworkMultiArray::operator=(const NetworkMultiArray& other) { super::operator=(other); // explicit use of operator= neccessary here! // copy extended stuff here // ... return *this; } Hope this helps! Regards, Stefan (another one) > -----Original Message----- > > Message: 3 > Date: Tue, 4 Mar 2008 16:21:12 +0100 > From: "Klett, Stefan" <stefan.klett(a)iwr.fzk.de> > Subject: [Boost-users] Extending Multi Array > To: <boost-users(a)lists.boost.org> > Message-ID: > <53834FBAA22A7F43B76C1BCD2D5A09D3026B16A0(a)FZKMSX6.ka.fzk.de> > Content-Type: text/plain; charset="us-ascii" > > Hi list members, > > This is a more or less a general kind of " how to extend container > classes" question - > I'm trying to write a class which inherits from > boost::multi_array - the > to get a kind of matrix class with some additional service routines. > Maybe it is a lack of experience - but I for the time being I > don't know > how to solve the problem to access the constructor of > multi_array in my > own class to initialize my matrix class - my current guess was to use > the "this" pointer but it had not worked out like I supposed > it to do. > > class NetworkMultiArray: public boost::multi_array<double,3> > { > public: > NetworkMultiArray(int); > virtual ~NetworkMultiArray(); > }; > > Here is the constructor code: > > > NetworkMultiArray::NetworkMultiArray(int length) > { > this::iterator iter3; > typedef this::template subarray<2>::type::iterator iter2; > typedef this::template subarray<1>::type::iterator iter1; > > for( iter1 i = *this.begin(); iter1 != *this.end(); iter1++){ > for(iter2 ii = (*i).begin(); ii != (*i).end(); ii++){ > for(iter3 iii = (*ii).begin(); iii != > (*ii).end(); iii++){ > *iii = 0.0 ; > } > } > } > } > sure this does not work - and is the result from trying to adapt the > iterator example from the documentation. > > my aim is to handle the NetworkMultiArray like a > boost::multi_array and > initialize it to zero - further it would be nice if somebody > could tell > me how I could assign a length to the array and the subarrays. > The key-point is that I want to use my class > (NetworkMultiArray) like a > multi_array by inheritance of the multi_array features of > boost:multi_array. > > Thank you very much in advance. > Best regards > Stefan

1 0

boost::ptr_array to use or not?
by j.c. 05 Mar '08

05 Mar '08

Hi, I have an pointer array of objects as follows: bucket * m_buckets[BUCKET_SIZE]; Because this array is a set size does it make sense to use a boost::ptr_array? boost::ptr_array<bucket, BUCKET_SIZE> m_buckets; * Note: One thing I first noticed with boost::array is that I cannot perform operations such as inserting at a desired index: // Existing code. m_buckets[bit] = new bucket(k,v); My goal is to use as many smart pointers as I can and less heap allocation. Thanks in advance, jc

2 1

[bind] Template deduction
by Robert Dailey 05 Mar '08

05 Mar '08

Hi, Suppose I have the following code: template< typename T > void DoFoo( int number, T object ) { } void main() { std::list<std::string> myStrings; // Assume myStrings is full of something... std::for_each( myStrings.begin(), myStrings.end(), boost::bind( &DoFoo, 5, _1 ) ); } On MSVC 9, this will not compile because DoFoo is a template, and at some point, boost::bind can't take a template as the function to call, or it can't deduce the function's template arguments. Is there a way I can make this work? Thanks.

2 1

boost posix time
by Aljaz 04 Mar '08

04 Mar '08

Hello I'm developing server and client applications and I need ping-pong mechanism to get ping time betwen them (time needed for data to arrive).. I've been thinking the best way would be to send Code: boost::posix_time::microsec_clock::universal_time()from server to client, which would then just reply with its own universal_time() .. The first problem is I dont know how to store universal_time() as an int/long.. I know I can store it as a string but this would take extra cpu to parse the data each time (with boost posix library).. All the data I send is serialized - maybe I could just serialize the Code: boost::posix_time::ptimeobject and send over? The next thing is what if server's time zone is gmt+1 and client's gmt+3? Will that affect the the time if I do the subtraction to get the ping time? If so, what can I do about it? Maybe anyone has better solution in mind? Thanks a lot for help

2 1

Ann: Floating Point Utilities Review starts today
by John Maddock 04 Mar '08

04 Mar '08

The review of Johan Rade's floating point utilities starts today. Code and docs can be downloaded from : http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… The library consists of three parts: 1) Floating point classification routines: these are optimised implementations of the C99 and C++ TR1 functions fpclassify, isinf, isnan, isnormal and isfinite. From Boost-1.35 onwards these are already a part of Boost.Math (see http://svn.boost.org/svn/boost/trunk/libs/math/doc/sf_and_dist/html/math_to…) so if accepted the two implementations will get merged. The review here should focus on the implementation used, and testing on whatever platforms you have available - in particular are there any circumstances (compiler optimisation settings etc) where this implementation breaks? 2) Sign manipulation functions: implementations of the C99 and C++ TR1 functions copysign and signbit, plus the changesign function. Two of these (signbit and copysign) are currently undocumented members of Boost.Math, and again the two implementations will get merged if this library is accepted. Again the main focus of the review here is the implementation, and testing thereof especially in the presence of compiler optimisations. 3) C++ locale facets: these will read and write non-finite numbers in a portable and round-trippable way: that is not otherwise possible with current C++ std library implementations. These are particularly useful for number-serialisation for example. Since the design is already specified by the C++ standard for these facets, your review here should focus on implementation, testing, documentation, and perhaps where in Boost these should best be placed if accepted. These look to be a useful collection of utilities, so I'll look forward to your reviews, Regards, John Maddock, Floating Point Utilities Review Manager.

9 34

Boost::random: Using linear congruential etc.
by Hans Mull 04 Mar '08

04 Mar '08

Hi! A few days ago I started to try out the boost::random library. Now I have a problem: If you don't want to use the "special cases" like minstd_rand[0] for linear_congruential hellekalek1995 for inverse congruential algorithm, how do you use them? I have non-constant parameters (which are not know at compile time). It would be nice if you give me some examples about how to use these "general case" algorithms. Best regards, Hans

1 0

boost::iostreams zlib compression
by j.c. 04 Mar '08

04 Mar '08

Ok I think this sucks. :-) Here is my code to implement zlib compression/decompression via boost. However since is uses streams I cannot simply pass a buffer. This code is intended for compress socket buffers, but is pathetically slow. HAs anyone done this? What can I improve? The copy seems to be the bottle neck. thx jc Here is my code: #include <boost/iostreams/copy.hpp> #include <boost/iostreams/filter/zlib.hpp> #include <boost/iostreams/device/file.hpp> #include <boost/iostreams/stream.hpp> #include <boost/iostreams/filtering_stream.hpp> #include <boost/iostreams/detail/config/zlib.hpp> using namespace boost::iostreams; std::string compress(std::string data) { std::stringstream compressed; std::stringstream decompressed; decompressed << data; boost::iostreams::filtering_streambuf<boost::iostreams::input> out; out.push(boost::iostreams::zlib_compressor()); out.push(decompressed); boost::iostreams::copy(out, compressed); return compressed.str(); } std::string decompress(std::string data) { std::stringstream compressed; std::stringstream decompressed; compressed << data; boost::iostreams::filtering_streambuf<boost::iostreams::input> out; out.push(boost::iostreams::zlib_decompressor()); out.push(compressed); boost::iostreams::copy(out, decompressed); return decompressed.str(); } int main() { std::string data = compress("boo!"); std::cout << data << std::endl; std::cout << decompress(data) << std::endl; return 0; }

3 6

compiling 64 bit boost on Mac OS 10.5
by Tom Smith 04 Mar '08

04 Mar '08

Hi, I've been trying and failing to get a 64 bit build of the boost libraries on 10.5. I always seem to end up with 32 bit binaries. I've tried various permutations involving bjam address-model=64 (I last tried to build a week ago so I'm hazy on the actual command line). I only need x64, not ppc64. Cheers, Tom

3 5

iterator_adapter/iterator_tag/std::distance bug
by Martin Wartens 04 Mar '08

04 Mar '08

I used boost::iterator_adapter with a std::vector iterator, all parameters set to boost::use_default. (So this is the same as a plain std::vector iterator) With this configuration, the iterator tag is recognized as "input_iterator_tag" not "random_iterator_tag" as it must be. This hurts because the iterator tag is used to select the right std::distance function. I could solve the problem by explicitly setting the traversal type template parameter to "std::random_access_iterator_tag", while "boost::random_access_traversal_tag" also didn't work. The compiler is VC8.

2 2

serialization - xml
by Ambardekar, Mukund 03 Mar '08

03 Mar '08

Hi, I used boost serialization to write my data in binary format as in below way - std::ofstream ofs(catalogFileName.c_str(),std::ios::binary); boost::archive::binary_oarchive oa(ofs); //write oa & m_myclass; // object of CMyClass type containing some data (say name) This worked correctly. Now I wanted to write into xml format. Did the below changes std::ofstream ofs(catalogFileName.c_str(),std::ios::binary); boost::archive::xml_oarchive oa(ofs); //write oa & m_myclass; But it is giving me below error - d:\tools\boost-1feb08\boost_1_34_1\boost\archive\basic_xml_oarchive.hpp( 83) : error C2027: use of undefined type 'boost::STATIC_ASSERTION_FAILURE<x>' Can you help me to identify the problem? FYI - I have made no changed CMyClass looks like as below. And I have made no changes in it (same one used for binary and xml) class CMyClass { public: Part(const std::wstring& Name); private: std::wstring m_name; friend class boost::serialization::access; template<class Archive> void serialize(Archive& ar, const unsigned int) { ar & m_name; } }; Thanks in advance. Regards, Mukund

2 1

Minimal human-readable boost::serialization ?
by Eric Newhuis 03 Mar '08

03 Mar '08

I looks like the last time this was mentioned in this mailing list was in 2005. Has anyone considered anything like boost::archive::json_oarchive etc.? JSON looks easy to read in log files. I want name-value pairs in my serialization. But I don't want the verbosity of XML. I think JSON would be ideal.

2 1

Better debugger support for boost::optional with VS2005 compiler
by Daniel Krügler 03 Mar '08

03 Mar '08

Hello, just recently I introduced boost::optional as default type to represent optional/nullable types in a sub-project of our company, which generates C++ code out of UML models. While this worked seamless, programmers not yet used to boost::optional complained that they could not really see, what such type "contains" if they try to observe it in the debugger. I searched for a solution, only finding the discussion around the article "how to see the actual value of a 'boost::optional<__int64>' in VS2005 debugger" from 2006-07-26, which did not gave a satisfactory answer. Please ignore this message, if the here described solution (or a better one), which I worked out this weekend, is already well-known (but I would appreciate if someone could give me a link to the already known solution). My approach was to modify the unofficially supported debugger configuration file autoexp.dat, which typically is found at ${SomePath}\Microsoft Visual Studio 8\Common7\Packages\Debugger\autoexp.dat If you never have heard of this file, you should make a copy of it, before doing the modifications I discuss here. A more detailled description what can be done with this file, can be read here (but you don't need to do that, if you just want to get the results I propose here): http://www.virtualdub.org/blog/pivot/entry.php?id=120 Just use your preferred text editor to open the autoexp.dat, jump at the end of it and go five rows back. You should be +/- 1 row about the line with the content: ; This section lets you define your own errors for the HRESULT display. Go one row back (row 1957 in my file), which should be the end of the so-called [Visualizer] section. Now insert here the text provided at the end of this article and just start you debugger session (you don't need to restart the studio) - you should have a nice view on each boost::optional, even those which are optionals of references. I tested the visualizer for the following boost versions: 1.30.0 1.31.0 1.32.0 1.33.0 1.33.1 1.34.1 and all of them worked. I would like to thank the boost developers for their great contributions (where boost::optional is only one of them) and I hope you can even more enjoy boost::optional with this trick. Unfortunately I have not found similar solutions for other compilers yet, e.g for gcc, which probably is due to my lack of experience with them but I would appreciate if someone else publishes them, too. Greetings from Bremen, Daniel Krügler ;------------------------------------------------------------------------------ ; Visualizer for boost::optional, boost::optional_detail::optional_base ;------------------------------------------------------------------------------ boost::optional<*>|boost::optional_detail::optional_base<*> { preview ( #if($e.m_initialized) ( *(($T1 *) (&$e.m_storage.dummy_.data[0])) ) #else ( "?" ) ) children ( #if($e.m_initialized) ( #(value: *(($T1 *) (&$e.m_storage.dummy_.data[0])) ) ) #else ( "?" ) ) } ;------------------------------------------------------------------------------

3 3

[filesystem] bug???
by Ovanes Markarian 03 Mar '08

03 Mar '08

Hello *! A short question: removing the leaf from the path using the remove_leaf() results in my case (MS VC7.1, boost 1.34.1) in the path with the trailing slash at the end. Next call to remove_leaf() results in removing this trailing slash, which is not correct... Is it a bug, if the doc states to remove_leaf: basic_path& remove_leaf(); Effects: If has_branch_path() then remove the last filename from the stored path. If that leaves the stored path with one or more trailing slash elements not representing root-directory, remove them. Many thanks, Ovanes

1 0

A possible bug in Boost.property_tree with UNICODE XML file?
by Tan, Tom (Shanghai) 03 Mar '08

03 Mar '08

I am trying read_xml() on an xml-format config file, which starts like this: <?xml version="1.0" encoding="UTF-16"> ..... This file is well-formed and verified by "XML Copy Writer", it can also be open by IE or Filefox with no problem. I am using this code snippet to parse this file: try{ read_xml<wptree>(xmlfile,pt); } catch(xml_parser-error e) { e.what(); } and it throws an exception saying "expected <". By looking into the code I found that, this caused by the fact that the xmlfile starts with a Unicode Byte Order Mark (BOM)-0xFFFE . "fffe 3c00 3f00 7800 ......" However, read_xml() cannot handle this BOM byte and throws. It's easy to fix it by simply discard the BOM byte, but I wonder whether there is already a flag to enable/disable this that I am unaware of. Can anyone help to clarify? Thanks, tom

1 0

Re: [Boost-users] templates: parts of functions
by Lang Stefan 03 Mar '08

03 Mar '08

Hi, As I am not overly familiar with boost or it's mpl library yet, I cannot provide any specific advice along these lines. According to your description, my advice would be to create helper template classes or functions that rely only on some of the template parameters of your actual template class, but not N. For these helper functions and classes you do not need partial specialization, and thus no duplicate code. Depending on the complexity of your functions you might also extract those parts that do not depend on N into more template functions. If these helpers need access to private members of your makeTree class, you can declare them friend. (you might need to replicate those friend declarations in your partial specializations) For those parts of the code that do depend on N, but do not need a different implementation, you may still provide templated helper classes. The compiler will still generate multiple class implementations for different values of N, but you won't need to replicate the actual code yourself. Hope this helps. Cheers, Stefan > ------------------------------ > > Message: 6 > Date: Sat, 1 Mar 2008 14:38:34 +0100 > From: "Hicham Mouline" <hicham(a)mouline.org> > Subject: [Boost-users] templates: parts of functions > To: <boost-users(a)lists.boost.org> > Message-ID: <000001c87ba1$8cfe0d30$a6fa2790$@org> > Content-Type: text/plain; charset="us-ascii" > > Hi, > > > > I have a function makeTree whose behavior depends on 3 > different policies > > typename T1 > > typename T2 > > int N > > > > For performance reasons, I need to write the 2- and 3- specializations > alongside the general N case. That is, the 2- and 3- default > > instantiations generated from the N case by the compiler are > not optimal. > > > > As it is impossible to write function templates partial > specializations, I > encapsulate the > > > > template< typename T1, typename T2, int N> void > makeTree(Head<N>&, const > T2&, const C&) ; > > > > function in a class template > > > > template< typename T1, typename T2, int N> class makeTree{ > > void makeTree(Head<N>&, const T2&, const C&); > > }; > > and write the partial specializations <T1,T2,2> and <T1,T2,3>. > > > > > > Now, this makeTree function is quite large. It includes code that : > > . doesn't depend on any of the template arguments > > . code that depends only T1 > > . code that depends only on T2 > > . code that depends only on N > > . code that depends only on <T1,N>. > > > > I am worried about code bloat, and the effect on overall > performance of the > actual code generated even if it is not run > > (I noticed substantial effects depending on the size of > object files and > final shared library generated). > > > > Besides this, I suppose it is a better design to have these > segments of code > put in template functions > > with the right template arguments. > > > > Is it MPL the library that I should look into for such work? > > Perhaps nothing in Boost particularly facilitates this work, > and std c++ > templates are enough, > > > > Thoughts, comments are appreciated, > > > > Rds, >

1 0

Why does runtime-debugging set _STLP_USE_DYNAMIC_LIB?
by Eric Woodruff 03 Mar '08

03 Mar '08

I've been trying to understand why the debug version of boost was attempting linkage with the DLL version of stlport (which I didn't build and I'm not using) and now I see that the runtime-debugging flag is specifying that the dynamic library must be used. This causes the static stlport to use the stlpdx cross namespace rather than the stlpd namespace. It is not obvious to me why debugging should require a dynamic library. Under code inspection this looks like a copy-paste oversight. if [ $(rproperties).get <runtime-debugging> ] = "on" { usage-requirements += <define>_STLP_DEBUG=1 <define>_STLP_DEBUG_UNINITIALIZED=1 ; } if [ $(rproperties).get <*runtime-debugging*> ] = "on" { usage-requirements += <define>_STLP_USE_DYNAMIC_LIB=1 ; } Why would it be checking for runtime-debugging twice? I think the second if should check for <runtime-link> which has the possible values "static" or "dynamic". This problem looks related to this thread: http://lists.boost.org/boost-users/2007/09/30905.php, but I couldn't find the Boost.Build message that is a follow-up to that one. I haven't found a posted solution either. Looking at the CVS HEAD revision of stlport.jam, it hasn't changed since 1_34_1. So if this is a bug, it has not been fixed yet. Thanks, Eric

2 1

Re: [Boost-users] fatal error C1128: object file format limit exceeded : more than 65, 279 sections -------PROBLEM SOLVED
by jono 03 Mar '08

03 Mar '08

i thought i had broken the translation unit in two, but it was a clever illusion ... doh.

1 0

fatal error C1128: object file format limit exceeded : more than 65, 279 sections
by jono 02 Mar '08

02 Mar '08

hi, i've received this error compiling a project under visual studio 7.1. "fatal error C1128: object file format limit exceeded : more than 65,279 sections" the problem appeared when i added a couple more specializations to a 'binary operator' visitor for manipulating boost variant objects. before this, there were 20 or 30 similar specializations compiling without errors or warnings. the visitor and helpers are as follows: =========================== template<BinaryOp op, typename ObjectT, typename ObjectU> Object binary_op(const ObjectT &arg1, const ObjectU &arg2) { return undefined; } template<BinaryOp op, typename ObjectT> Object binary_op(const ObjectT &arg1) { return undefined; } template<BinaryOp op> class BinaryOpVisitor : public boost::static_visitor<Object> { public: template<typename ObjectT> Object operator()( const ObjectT &arg0) const; { return binary_op<op, ObjectT>(arg0); } template<typename ObjectT, typename ObjectU> Object operator()( const ObjectT &arg0, const ObjectU &arg1) const { return binary_op<op, ObjectT, ObjectU>(arg0, arg1); } }; ======================== and specialized: ======================== template<> INLINE Object binary_op<ADD>(const Integer& arg0, const Integer& arg1){return make<Integer>(arg0 + arg1);} .... .... .... .... etc etc ======================== the variant type looks like this.... ======================== typedef boost::make_recursive_variant< Nil ,Integer ,Real ,String ,Error ,Class ,Character ,Stream ,Boolean ,boost::recursive_wrapper< Symbol > ,boost::recursive_wrapper< Lambda > ,boost::recursive_wrapper< Function > ,boost::recursive_wrapper< Pair > >::type Atom; ======================== i imagine there are some combinatorial proliferations of template instantiation going on in the compiler. the operators were declared inline, but removing that didn't fix the error. i've restructured the source code in other ways, but without success so far. visual studio 8 has a compiler switch /bigobj to resolve this problem: "By default, an object file can hold up to 65,536 (2^16) addressable sections. /bigobj increases that address capacity to 4,294,967,296 (2^32)." i haven't tried compiling this project with g++ since making these changes (haven't checked them in) so i don't know what its limits are. does anyone has experience with solving this problem. is it a problem with my visitor class? is there a way i can break my recursive variant down for the compiler? cheers, Jono Poff

1 0

a difference of boost.function between g++4.13 and vc8
by 钱晓明 02 Mar '08

02 Mar '08

I wrote some code using boost.function. Compiling it both in g++4.13 and vc8, I find that I can not declare a struct in function with operator() and use boost.function to call it when I use g++. Just like this: int main() { struct int_div { float operator()(int x, int y) const { return ((float)x)/y; }; }; boost::function<float (int x, int y)> f = int_div(); std::cout << f(5, 3) << std::endl; return 0; } When I compile the code above in g++, it give me the error : 请求从 'main()::int_div' 转换到非标量类型 'boost::function<float ()(int, int), std::allocator<void> >'(I use ubuntu chinese.) but when I move the int_div definition outside of main(), It is ok! And the code above VC8 can compile it! why?

2 1

Re: [Boost-users] [boost] Serialization of Range library's sub_range
by brass goowy 02 Mar '08

02 Mar '08

Brian Wood writes: >Recently, I suggested there should be serialization support wrt >the Range library - >http://lists.boost.org/Archives/boost/2008/01/132294.php. >I'm writing to inform you of my plans in this regard. This input: > >Msgs > (sub_range<list<short> >) @OUT >} > >to the C++ Middleware Writer, http://home.seventy7.com/cgi-bin/samb.cgi, >results in this output: > >#include <boost/range/sub_range.hpp> >#include <list> >#include <Buffer.hh> >using boost::sub_range; > > >struct Msgs >{ >inline >Msgs() {} >inline >~Msgs() {} > >inline >int >Send(Buffer* buf, const sub_range<list<short> >& about1) >{ > unsigned int headCount = 0; > headCount = about1.size(); > if (!buf->Receive(&headCount, sizeof(int))) { > buf->ews_.SetErrorWords(1, __FILE__, __LINE__); > return 0; > } > list<short>::const_iterator rit1 = boost::begin(about1); > list<short>::const_iterator rit2 = boost::end(about1); > for (; rit1 != rit2; ++rit1) { > if (!buf->Receive(&(*rit1), sizeof(short))) { > buf->ews_.SetErrorWords(1, __FILE__, __LINE__); > return 0; > } > } > > if (!buf->SendStoredData()) { > buf->ews_.SetErrorWords(2, __FILE__, __LINE__); > return 0; > } > return 1; >} > >}; > >This functionality isn't available online yet. G-d willing, it >will be available by the middle of next month. Update: the functionality is now available online. Brian Wood Ebenezer Enterprises www.webebenezer.net

1 0

Boost file system idiocy
by Patrick Loney 02 Mar '08

02 Mar '08

Can't find how to seek to eof, currently using: fs.seekp( (std::streamoff)boost::filesystem::file_size( SKDO::ArchiveFilePath( keyname ) ) ); please help ****************************************************************************** "This message and any attachments are solely for the intended recipient and may contain confidential and privileged information. If you are not the intended recipient, any disclosure, copying, use, or distribution of the information included in this message and any attachments is prohibited. If you have received this communication in error, please notify us by reply e-mail and immediately and permanently delete this message and any attachments. Thank you." Interactive Transaction Solutions Ltd (2473364 England) Registered Office: Systems House, Station Approach Emsworth PO10 7PW ********************************************************************** Ce message �lectronique contient des informations confidentielles � l'usage unique des destinataires indiqu�s, personnes physiques ou morales. Si vous n'�tes pas le destinataire voulu, toute divulgation, copie, ou diffusion ou toute autre utilisation de ces informations, est interdite. Si vous avez re�u ce message �lectronique par erreur, nous vous remercions d'en avertir son exp�diteur imm�diatement par email et de d�truire ce message ainsi que les �l�ments attach�s. Interactive transaction Solutions SAS- France (RCS Pontoise : 489 397 877) Si�ge social : Parc Saint Christophe, 10, Avenue de l�Entreprise 95865 Cergy-Pontoise Cedex ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________

2 1

Couting occourance of specified characters
by Olaf Peter 01 Mar '08

01 Mar '08

Hi, the snipped attached counts the accourance of a specified character. Is there a simpler way using the boost libs? This solution looks quite overkill. It should be fast ;-) Thanks, Olaf

2 1

Bind + Function + Arguments
by QbProg 01 Mar '08

01 Mar '08

Hello there, I've started using boost function and bind features , and I'd like to find a way to do the following. You can take it as suggestion, if it is not implemented :) I would like to use the bind function on object members in the same way indipendently of the number of arguments. For example: function <void (int , int ) > FunctionOne; function < bool (int ) > FunctionTwo; class Implementor { public: void ImplOne ( int , int ); bool ImplTwo ( int ); }; void test () { Implementor i; FunctionOne = bind ( &Implementor::ImplOne , &i , _1 , _ 2); FunctionTwo = bind (&Implemenetor::ImplTwo, &i , _1); /* I Would be nice to do something like this, with parameter "guessing" */ // FunctionOne = GenericBind ( &Implementor::ImplOne ,&i); // FunctionTwo = GenericBind ( &Implementor::ImplTwo, &i); /* This will greatly remove verbosity! */ /* Actually I do */ #define Bind0(A,B) bind(A,B) #define Bind1(A,B) bind(A,B,_1) #define Bind2(A,B) bind(A,B,_1,_2) ...... FunctionOne = Bind2 ( &Implementor::ImplOne , &i ); FunctionTwo = Bind1 ( &Implementor::ImplTwo , &i); } It would be usefoul to make library callbacks more usable, insteat of writing a long list of arguments each time. It is possible with current implementation? I ask you for any suggestion, Thank you QbProg

2 3

[Review] Proto review starts today, March 1st
by Hartmut Kaiser 01 Mar '08

01 Mar '08

Hi all, The review of Eric Nieblers Proto library starts today, March 1st 2008, and will end on March 14th. I really hope to see your vote and your participation in the discussions on the Boost mailing lists! --------------------------------------------------- About the library: Proto is a framework for building Domain Specific Embedded Languages in C++. It provides tools for constructing, type-checking, transforming and executing expression templates. More specifically, Proto provides: * An expression tree data structure. * Operator overloads for building the tree from an expression. * Utilities for defining the grammar to which an expression must conform. * An extensible mechanism for immediately executing an expression template. * An extensible set of tree transformations to apply to expression trees. * A mechanism for giving expressions additional behaviors and members. Documentation is here: http://boost-sandbox.sourceforge.net/libs/proto Download proto.zip from here: http://www.boost-consulting.com/vault/index.php?directory=Template%20Metapro gramming Proto is a very important infrastructure library, IHMO. It has been used as the backbone for several other library writing efforts already, such as Xpressive and the rewrite of Spirit (there it has been used for all three parts: the parser, the lexer and the generator modules), and it is a key enabling technology in the long-planned unification of Phoenix and the Lambda Library. --------------------------------------------------- Please always state in your review, whether you think the library should be accepted as a Boost library! Additionally please consider giving feedback on the following general topics: - What is your evaluation of the design? - What is your evaluation of the implementation? - What is your evaluation of the documentation? - What is your evaluation of the potential usefulness of the library? - Did you try to use the library? With what compiler? Did you have any problems? - How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? - Are you knowledgeable about the problem domain? Regards Hartmut Review Manager

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templates: parts of functions
by Hicham Mouline 01 Mar '08

01 Mar '08

Hi, I have a function makeTree whose behavior depends on 3 different policies typename T1 typename T2 int N For performance reasons, I need to write the 2- and 3- specializations alongside the general N case. That is, the 2- and 3- default instantiations generated from the N case by the compiler are not optimal. As it is impossible to write function templates partial specializations, I encapsulate the template< typename T1, typename T2, int N> void makeTree(Head<N>&, const T2&, const C&) ; function in a class template template< typename T1, typename T2, int N> class makeTree{ void makeTree(Head<N>&, const T2&, const C&); }; and write the partial specializations <T1,T2,2> and <T1,T2,3>. Now, this makeTree function is quite large. It includes code that : . doesn't depend on any of the template arguments . code that depends only T1 . code that depends only on T2 . code that depends only on N . code that depends only on <T1,N>. I am worried about code bloat, and the effect on overall performance of the actual code generated even if it is not run (I noticed substantial effects depending on the size of object files and final shared library generated). Besides this, I suppose it is a better design to have these segments of code put in template functions with the right template arguments. Is it MPL the library that I should look into for such work? Perhaps nothing in Boost particularly facilitates this work, and std c++ templates are enough, Thoughts, comments are appreciated, Rds,

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