April 2012 - Boost-users - lists.preview.boost.org

OpenVMS Build
by Victor Kirk 05 Apr '12

05 Apr '12

Hi, Apologies to anyone receiving/reading this for the second time, I originally sent this to the wrong list. I'm hoping to port an application to open vms using HP C++7.3. I don't suppose anyone has any dcl scripts to build boost. I 'only' need asio and threading. Currently I'm just trying to compile the asio chat examples. I'm completely new to VMS and the compiler, I managed to get a few things to compile but now get a "could not open source file "sys/select.h"', a bit of googling suggests I may need to have an HP porting library installed or maybe I'm just missing an prepocessor directive to include the correct code, can't see anything obvious in socket_types.hpp to set? Any pointers in the right general direction would be gratefully appreciated. Kind Regards, Vic -- Victor Kirk Analyst Transportation Systems - Network Services Serco Civil Government Cavendish House Clearwater Park Prince's Wharf Stockton-On-Tees TS17 6QY T +44 (0) 1642 636 894 F +44 (0) 1642 636 701 Victor.Kirk(a)serco.com<mailto:user.name@serco.com> www.serco.com<http://www.serco.com> [cid:image001.gif@01CD1271.9BF065C0]<http://www.serco.com/> This e-mail and any attachments are for the intended addressee(s) only and may contain confidential and/or privileged material. If you are not a named addressee, do not use, retain or disclose such information. This email is not guaranteed to be free from viruses and does not bind Serco in any contract or obligation. Serco Limited. Registered in England and Wales. No: 242246 Registered Office: Serco House,16 Bartley Wood Business Park, Hook, Hampshire RG27 9UY United Kingdom.

2 2

File-system persistence for boost shared memory files
by Rajalakshmi Iyer 05 Apr '12

05 Apr '12

Hello, The boost documentation suggests that shared memory interprocess mechanism can have file-system or kernel persistence. When I create shared memory files on an Ubuntu Linux host, they are created at /var/run/shm. But on a system reboot, the shared memory files go away, which means they are using kernel persistence. How can I ensure that shared memory files persist across reboots? Thanks! -- Twitter: @Blismobile <http://twitter.com/#!/blismobile> BlisMobile Media 32 Percy Street, London W1T 2DE www.blismobile.com [image: BlisMobile] <http://www.blismobile.com/>[image: Follow on Twitter]<http://twitter.com/#!/blismobile>[image: Blis Website] <http://www.blismobile.com/> This communication is from BlisMobile Media, which is a trading name of Breeze Tech (UK) Ltd, a company registered in England and Wales with registered number 06455773. Its registered office is 32 Percy Street, London W1T 2DE, United Kingdom. This communication contains information that is confidential and may also be privileged. It is for the exclusive use of the intended recipient(s). If you are not the intended recipient(s), please (1) notify info(a)blismobile.com by forwarding this email and delete all copies from your system and (2) note that disclosure, distribution, copying or use of this communication is strictly prohibited. Email communications cannot be guaranteed to be secure or free from error or viruses. All emails sent to or from a Blismobile email account are securely archived and stored by an external supplier. This email does not constitute a contractual agreement; such agreements are in specified contractual or Insertion Order (IO) form only and exclusively contain all the terms to which Breeze Tech )UK) Ltd will be bound. To the extent permitted by law, Breeze Tech (UK) Ltd does not accept any liability for use of or reliance on the contents of this email by any person save by the intended recipient(s) to the extent agreed in a contract or Insertion Order. Opinions, conclusions and other information in this email which have not been delivered by way of the business of Breeze Tech (UK) Ltd are neither given nor endorsed by it.

3 4

Getting Position from result of "boost::make_split_iterator(s1, token_finder(is_any_of(s2), token_compress_on)); "
by asif saeed 05 Apr '12

05 Apr '12

Hi, Can I get the position from the iterator that I get from split_iterator? The position I am seeking to determine is the "zero-based number of token separated by the separator". That is, in "one;two;three;four;five;six;seven;eight", the position of three is 2 and eight is 7. Can anyone help me on this? I am using Boost 1.47.0 on Windows 2003 Standard Edition 32-bit with Visual C++ 2010 Express. Best regards, Asif

1 0

udp with virtual network cards
by Gianni Ambrosio 05 Apr '12

05 Apr '12

Dear All, I implemented an UDP Multicast socket connection with boost. It works fine if I test server and client on the same PC (windows Xp or 7) but If server and client are (normally) on different PCs and at least on the client side there are virtual network cards active, the client does not receve udp data. It seems the udp connection uses one of the virtual cards and in that case it doesn't work. In fact If I deactivate all virtual cards then it starts working. Can you explain me please what's going on? Regards Gianni

3 7

Why Boost uBLAS
by delryn＠gmx.de 05 Apr '12

05 Apr '12

Good day, i started using boost one month ago. Now i saw that boost is offering uBLAS to use/manipulate matrices. So my question is: Why is the wheel invented totally new? The uBLAS-Team even writes that they focus an "correct algorithm" and that "performance will be improved later". Why cant boost simply adpot http://arma.sourceforge.net/ or Newmat 11: http://www.robertnz.net/nm11.htm#refer I used Newmat in many complex commercial projects where performance was very important. Newmat is easy to use and I dont now any bugs. Maybe the interface is not totally stl compatible, but this library is very easy and intuitive to use. What do you think about this? -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de

4 3

boost_filesystem, undefined reference to boost::assertion_failed_msg
by André Prata 04 Apr '12

04 Apr '12

This is for boost 1.48.0. I'm trying to use and link my code with libboost_filesystem, but it fails with this: ../../bin.v2/app/networkmanager/gcc-4.6.3/debug/link-static/types/Settings.o: In function `boost::filesystem3::directory_iterator::dereference() const': /boost-location/boost_1_48_0/boost/filesystem/v3/operations.hpp:638: undefined reference to `boost::assertion_failed_msg(char const*, char const*, char const*, char const*, long)' What do I need to link it with? What am I doing wrong? Thanks, André Prata

1 1

Using boost atomics on data residing in shared memory
by Philip Windle 04 Apr '12

04 Apr '12

Is atomicity guaranteed on data residing in shared memory? E.g. Processes allocate shared memory as follows using either create_only and truncate or open_only: #define SHARED_MEM_SIZE sizeof(boost::uint32_t) #define SHARED_MEM_NAME "SHMTest" boost::shared_ptr<shared_memory_object> shm_obj; boost::shared_ptr<mapped_region> mapping; std::string sharedMemoryName(SHARED_MEM_NAME); shm_obj.reset(new shared_memory_object(create_only, sharedMemoryName.c_str(), read_write)); shm_obj->truncate(SHARED_MEM_SIZE); mapping.reset(new mapped_region(*shm_obj, read_write, 0, SHARED_MEM_SIZE)); Then, they use the boost atomic functions to read and write to the memory: volatile boost::uint32_t* temp = static_cast<volatile boost::uint32_t*>(mapping->get_address()); unsigned int value = boost::interprocess::detail::atomic_read32(temp); boost::interprocess::detail::atomic_write32(temp, value); Are these memory accesses guaranteed to be atomic? Platform is Linux if that makes a difference. Thanks P Please consider the environment before printing this email This e-mail and any files transmitted with it are confidential, may be legally privileged, and are for the sole use of the intended recipient. Copyright in this e-mail and any accompanying document created by us is owned by us. If you are not the intended recipient of this e-mail or any part of it please telephone our IT Department at the number shown above or by e-mail at info(a)schneidertrading.com. You should not use or disclose to any other person the contents of this e-mail or its attachments (if any), nor take copies. This e-mail is not a representation or warranty and is not intended nor should it be taken to create any legal relations, contractual or otherwise. Schneider Trading Associates Ltd (Registration No. 3692131) is incorporated in England and Wales and the registered office is at 25 Copthall Avenue, London EC2R 7BP. The company is authorised and regulated by the Financial Services Authority

2 1

Python quickstart hanging on build with bjam
by Harry Griff 04 Apr '12

04 Apr '12

Hi, I have downloaded boost_1_49_0 to my Mac with OS X 10.5.8. I then ran: In the home folder I have: using python : 3.1 : /Library/Frameworks/Python.framework/Versions/3.1/bin/python3.1 ; In user-config.jam. I then ran the following: *** *** Start Screen dump 1 *** $ ./bjam --with-python --user-config=user-config.jam Building the Boost C++ Libraries. Component configuration: - chrono : not building - date_time : not building - exception : not building - filesystem : not building - graph : not building - graph_parallel : not building - iostreams : not building - locale : not building - math : not building - mpi : not building - program_options : not building - python : building - random : not building - regex : not building - serialization : not building - signals : not building - system : not building - test : not building - thread : not building - timer : not building - wave : not building ...patience... ...patience... ...found 1599 targets... ...updating 2 targets... darwin.link.dll bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/libboost_python3.dylib Undefined symbols: "_PyFile_AsFile", referenced from: boost::python::exec_file(boost::python::str, boost::python::api::object, boost::python::api::object)in exec.o "_PyString_FromFormat", referenced from: boost::python::converter::rvalue_from_python_stage2(_object*, boost::python::converter::rvalue_from_python_stage1_data&, boost::python::converter::registration const&)in from_python.o boost::python::converter::(anonymous namespace)::throw_no_lvalue_from_python(_object*, boost::python::converter::registration const&, char const*) in from_python.o boost::python::converter::(anonymous namespace)::lvalue_result_from_python(_object*, boost::python::converter::registration const&, char const*) in from_python.o boost::python::converter::registration::to_python(void const volatile*) constin registry.o _enum_repr in enum.o _enum_repr in enum.o "_PyClass_Type", referenced from: _PyClass_Type$non_lazy_ptr in function.o "_PyNumber_Divide", referenced from: boost::python::api::operator/(boost::python::api::object const&, boost::python::api::object const&)in object_operators.o "_PyString_FromStringAndSize", referenced from: boost::python::numeric::(anonymous namespace)::load(bool) in numeric.o boost::python::detail::str_base::str_base(char const*, char const*)in str.o boost::python::detail::str_base::str_base(char const*, char const*)in str.o boost::python::detail::str_base::str_base(char const*, unsigned long)in str.o boost::python::detail::str_base::str_base(char const*, unsigned long)in str.o boost::python::converter::do_return_to_python(char)in builtin_converters.o boost::python::tuple boost::python::make_tuple<boost::python::str, boost::python::api::object, boost::python::str, boost::python::str, boost::python::str, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::python::str>(boost::python::str const&, boost::python::api::object const&, boost::python::str const&, boost::python::str const&, boost::python::str const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, boost::python::str const&)in function_doc_signature.o boost::python::tuple boost::python::make_tuple<boost::python::api::object, boost::python::str, boost::python::str, boost::python::str, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::python::str>(boost::python::api::object const&, boost::python::str const&, boost::python::str const&, boost::python::str const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, boost::python::str const&)in function_doc_signature.o boost::python::tuple boost::python::make_tuple<boost::python::str, boost::python::api::object, boost::python::str, boost::python::str, boost::python::str, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >(boost::python::str const&, boost::python::api::object const&, boost::python::str const&, boost::python::str const&, boost::python::str const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)in function_doc_signature.o "_PyInt_Type", referenced from: _PyInt_Type$non_lazy_ptr in enum.o "_PyString_FromString", referenced from: boost::python::detail::str_base::str_base()in str.o boost::python::detail::str_base::str_base()in str.o boost::python::detail::str_base::str_base(char const*)in str.o boost::python::detail::str_base::str_base(char const*)in str.o boost::python::converter::do_return_to_python(char const*)in builtin_converters.o "_PyInt_AsLong", referenced from: boost::python::detail::list_base::count(boost::python::api::object const&) constin list.o boost::python::detail::list_base::index(boost::python::api::object const&) constin list.o boost::python::detail::list_base::insert(boost::python::api::object const&, boost::python::api::object const&)in list.o boost::python::detail::str_base::startswith(boost::python::api::object const&, boost::python::api::object const&, boost::python::api::object const&) constin str.o boost::python::detail::str_base::isupper() constin str.o boost::python::detail::str_base::istitle() constin str.o boost::python::detail::str_base::isspace() constin str.o boost::python::detail::str_base::islower() constin str.o boost::python::detail::str_base::isdigit() constin str.o boost::python::detail::str_base::isalpha() constin str.o boost::python::detail::str_base::isalnum() constin str.o boost::python::detail::str_base::startswith(boost::python::api::object const&) constin str.o boost::python::detail::str_base::startswith(boost::python::api::object const&, boost::python::api::object const&) constin str.o boost::python::detail::str_base::find(boost::python::api::object const&, boost::python::api::object const&, boost::python::api::object const&) constin str.o boost::python::detail::str_base::index(boost::python::api::object const&, boost::python::api::object const&, boost::python::api::object const&) constin str.o boost::python::detail::str_base::rfind(boost::python::api::object const&, boost::python::api::object const&, boost::python::api::object const&) constin str.o boost::python::detail::str_base::rindex(boost::python::api::object const&, boost::python::api::object const&, boost::python::api::object const&) constin str.o boost::python::detail::str_base::find(boost::python::api::object const&, boost::python::api::object const&) constin str.o boost::python::detail::str_base::index(boost::python::api::object const&, boost::python::api::object const&) constin str.o boost::python::detail::str_base::rfind(boost::python::api::object const&, boost::python::api::object const&) constin str.o boost::python::detail::str_base::rindex(boost::python::api::object const&, boost::python::api::object const&) constin str.o boost::python::detail::str_base::endswith(boost::python::api::object const&) constin str.o boost::python::detail::str_base::find(boost::python::api::object const&) constin str.o boost::python::detail::str_base::index(boost::python::api::object const&) constin str.o boost::python::detail::str_base::rfind(boost::python::api::object const&) constin str.o boost::python::detail::str_base::rindex(boost::python::api::object const&) constin str.o _instance_new in class.o boost::python::converter::(anonymous namespace)::slot_rvalue_from_python<int, boost::python::converter::(anonymous namespace)::signed_int_rvalue_from_python<int> >::construct(_object*, boost::python::converter::rvalue_from_python_stage1_data*)in builtin_converters.o boost::python::converter::(anonymous namespace)::slot_rvalue_from_python<long, boost::python::converter::(anonymous namespace)::signed_int_rvalue_from_python<long> >::construct(_object*, boost::python::converter::rvalue_from_python_stage1_data*)in builtin_converters.o boost::python::converter::(anonymous namespace)::slot_rvalue_from_python<signed char, boost::python::converter::(anonymous namespace)::signed_int_rvalue_from_python<signed char> >::construct(_object*, boost::python::converter::rvalue_from_python_stage1_data*)in builtin_converters.o boost::python::converter::(anonymous namespace)::slot_rvalue_from_python<short, boost::python::converter::(anonymous namespace)::signed_int_rvalue_from_python<short> >::construct(_object*, boost::python::converter::rvalue_from_python_stage1_data*)in builtin_converters.o "_PyNumber_InPlaceDivide", referenced from: boost::python::api::operator/=(boost::python::api::object&, boost::python::api::object const&)in object_operators.o "_PyString_InternFromString", referenced from: _function_get_name in function.o "_PyString_Size", referenced from: boost::python::converter::(anonymous namespace)::slot_rvalue_from_python<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::python::converter::(anonymous namespace)::string_rvalue_from_python>::construct(_object*, boost::python::converter::rvalue_from_python_stage1_data*)in builtin_converters.o "_PyFile_FromString", referenced from: boost::python::exec_file(boost::python::str, boost::python::api::object, boost::python::api::object)in exec.o boost::python::exec_file(boost::python::str, boost::python::api::object, boost::python::api::object)in exec.o "_PyString_Type", referenced from: _PyString_Type$non_lazy_ptr in str.o "_PyInt_FromLong", referenced from: boost::python::numeric::aux::array_base::argmin(long)in numeric.o boost::python::numeric::aux::array_base::argmax(long)in numeric.o boost::python::numeric::aux::array_base::argsort(long)in numeric.o boost::python::detail::returnable<boost::python::api::object>::type boost::python::call<boost::python::api::object, long, long, long>(_object*, long const&, long const&, long const&, boost::type<boost::python::api::object>*)in numeric.o boost::python::detail::returnable<boost::python::api::object>::type boost::python::call<boost::python::api::object, long, long, long>(_object*, long const&, long const&, long const&, boost::type<boost::python::api::object>*)in numeric.o boost::python::detail::returnable<boost::python::api::object>::type boost::python::call<boost::python::api::object, long, long, long>(_object*, long const&, long const&, long const&, boost::type<boost::python::api::object>*)in numeric.o boost::python::detail::returnable<boost::python::api::object>::type boost::python::call<boost::python::api::object, long, long>(_object*, long const&, long const&, boost::type<boost::python::api::object>*)in numeric.o boost::python::detail::returnable<boost::python::api::object>::type boost::python::call<boost::python::api::object, long, long>(_object*, long const&, long const&, boost::type<boost::python::api::object>*)in numeric.o boost::python::detail::returnable<boost::python::api::object>::type boost::python::call<boost::python::api::object, boost::python::api::object, long>(_object*, boost::python::api::object const&, long const&, boost::type<boost::python::api::object>*)in numeric.o boost::python::detail::list_base::pop(long)in list.o boost::python::detail::returnable<boost::python::api::object>::type boost::python::call<boost::python::api::object, long, boost::python::api::object>(_object*, long const&, boost::python::api::object const&, boost::type<boost::python::api::object>*)in list.o boost::python::objects::enum_base::to_python(_typeobject*, long)in enum.o boost::python::objects::enum_base::to_python(_typeobject*, long)in enum.o boost::python::objects::enum_base::add_value(char const*, long)in enum.o boost::python::objects::enum_base::add_value(char const*, long)in enum.o boost::python::objects::enum_base::export_values() in enum.o boost::python::objects::enum_base::export_values() in enum.o _object* boost::python::api::object_base_initializer<unsigned int>(unsigned int const&)in enum.o _object* boost::python::api::object_base_initializer<unsigned long>(unsigned long const&)in class.o boost::python::objects::function_doc_signature_generator::parameter_string(boost::python::objects::py_function const&, unsigned long, boost::python::api::object, bool)in function_doc_signature.o boost::python::objects::function_doc_signature_generator::pretty_signature(boost::python::objects::function const*, unsigned long, bool)in function_doc_signature.o boost::python::api::object::object<int>(int const&)in function_doc_signature.o boost::python::api::proxy<boost::python::api::slice_policies> boost::python::api::object_operators<boost::python::api::object>::slice<int, boost::python::api::slice_nil>(int const&, boost::python::api::slice_nil const&)in function_doc_signature.o "_Py_InitModule4", referenced from: boost::python::detail::init_module(char const*, void (*)())in module.o "_PyString_AsString", referenced from: _enum_repr in enum.o _enum_repr in enum.o _enum_repr in enum.o boost::python::converter::(anonymous namespace)::convert_to_cstring(_object*) in builtin_converters.o boost::python::converter::(anonymous namespace)::slot_rvalue_from_python<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::python::converter::(anonymous namespace)::string_rvalue_from_python>::construct(_object*, boost::python::converter::rvalue_from_python_stage1_data*)in builtin_converters.o ld: symbol(s) not found collect2: ld returned 1 exit status "g++" -dynamiclib -Wl,-single_module -install_name "libboost_python3.dylib" -L"/Library/Frameworks/Python.framework/Versions/3.1/lib" -L"/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/config" -o "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/libboost_python3.dylib" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/numeric.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/list.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/long.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/dict.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/tuple.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/str.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/slice.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/converter/from_python.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/converter/registry.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/converter/type_id.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/object/enum.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/object/class.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/object/function.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/object/inheritance.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/object/life_support.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/object/pickle_support.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/errors.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/module.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/converter/builtin_converters.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/converter/arg_to_python_base.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/object/iterator.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/object/stl_iterator.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/object_protocol.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/object_operators.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/wrapper.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/import.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/exec.o" "bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/object/function_doc_signature.o" -lpython3.1 -headerpad_max_install_names -Wl,-dead_strip -no_dead_strip_inits_and_terms ...failed darwin.link.dll bin.v2/libs/python/build/darwin-4.0.1/release/threading-multi/libboost_python3.dylib... ...skipped <pstage/lib>libboost_python3.dylib for lack of <pbin.v2/libs/python/build/darwin-4.0.1/release/threading-multi>libboost_python3.dylib... ...failed updating 1 target... ...skipped 1 target... *** *** End Screen dump 1 *** So I changed to 2.7 in the user config file and got: *** *** Start Screen dump 2 *** ./bjam --with-python --user-config=user-config.jam Building the Boost C++ Libraries. Component configuration: - chrono : not building - date_time : not building - exception : not building - filesystem : not building - graph : not building - graph_parallel : not building - iostreams : not building - locale : not building - math : not building - mpi : not building - program_options : not building - python : building - random : not building - regex : not building - serialization : not building - signals : not building - system : not building - test : not building - thread : not building - timer : not building - wave : not building ...patience... ...patience... ...found 1597 targets... The Boost C++ Libraries were successfully built! The following directory should be added to compiler include paths: /Users/me/Desktop/boost_1_49_0 The following directory should be added to linker library paths: /Users/me/Desktop/boost_1_49_0/stage/lib *** *** End Screen dump 2 *** So that seemed to work. I then entered: *** *** Start Screen dump 3 *** $cd libs/python/example/quickstart/ $../../../../bjam toolset=darwin --verbose-test test ...patience... ...patience... ...found 1680 targets... ...updating 17 targets... common.mkdir bin common.mkdir bin/test_embed.test common.mkdir bin/test_embed.test/darwin-4.0.1 common.mkdir bin/test_embed.test/darwin-4.0.1/debug common.mkdir bin/darwin-4.0.1 common.mkdir bin/darwin-4.0.1/debug darwin.compile.c++ bin/darwin-4.0.1/debug/embedding.o darwin.link bin/darwin-4.0.1/debug/embedding testing.capture-output bin/test_embed.test/darwin-4.0.1/debug/test_embed.run ====== BEGIN OUTPUT ====== registering extension module embedded_hello... defining Python class derived from Base... testing derived class from C++... success! running file script.py... Hello World ! success! intentionally causing a python exception... Traceback (most recent call last): File "<string>", line 1, in <module> NameError: name 'unknown' is not defined No errors detected. EXIT STATUS: 0 ====== END OUTPUT ====== **passed** bin/test_embed.test/darwin-4.0.1/debug/test_embed.test common.mkdir bin/test_ext.test common.mkdir bin/test_ext.test/darwin-4.0.1 common.mkdir bin/test_ext.test/darwin-4.0.1/debug darwin.compile.c++ bin/darwin-4.0.1/debug/extending.o darwin.link.dll bin/darwin-4.0.1/debug/extending.so *** *** End Screen dump 3 *** It hangs on the last line so I have to cancel it. I then ran: *** *** Start Screen dump 4 *** $ python2.7 test_extending.py Trying: from extending import * Expecting nothing ********************************************************************** File "/Users/me/Desktop/boost_1_49_0/libs/python/example/quickstart/test_extending.py", line 6, in test_extending Failed example: from extending import * Exception raised: Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest test_extending[0]>", line 1, in <module> from extending import * ImportError: No module named extending Trying: hi = hello('California') Expecting nothing ********************************************************************** File "/Users/me/Desktop/boost_1_49_0/libs/python/example/quickstart/test_extending.py", line 7, in test_extending Failed example: hi = hello('California') Exception raised: Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest test_extending[1]>", line 1, in <module> hi = hello('California') NameError: name 'hello' is not defined Trying: hi.greet() Expecting: 'Hello from California' ********************************************************************** File "/Users/me/Desktop/boost_1_49_0/libs/python/example/quickstart/test_extending.py", line 8, in test_extending Failed example: hi.greet() Exception raised: Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest test_extending[2]>", line 1, in <module> hi.greet() NameError: name 'hi' is not defined Trying: invite(hi) Expecting: 'Hello from California! Please come soon!' ********************************************************************** File "/Users/me/Desktop/boost_1_49_0/libs/python/example/quickstart/test_extending.py", line 10, in test_extending Failed example: invite(hi) Exception raised: Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest test_extending[3]>", line 1, in <module> invite(hi) NameError: name 'invite' is not defined Trying: hi.invite() Expecting: 'Hello from California! Please come soon!' ********************************************************************** File "/Users/me/Desktop/boost_1_49_0/libs/python/example/quickstart/test_extending.py", line 12, in test_extending Failed example: hi.invite() Exception raised: Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest test_extending[4]>", line 1, in <module> hi.invite() NameError: name 'hi' is not defined Trying: class wordy(hello): def greet(self): return hello.greet(self) + ', where the weather is fine' Expecting nothing ********************************************************************** File "/Users/me/Desktop/boost_1_49_0/libs/python/example/quickstart/test_extending.py", line 15, in test_extending Failed example: class wordy(hello): def greet(self): return hello.greet(self) + ', where the weather is fine' Exception raised: Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest test_extending[5]>", line 1, in <module> class wordy(hello): NameError: name 'hello' is not defined Trying: hi2 = wordy('Florida') Expecting nothing ********************************************************************** File "/Users/me/Desktop/boost_1_49_0/libs/python/example/quickstart/test_extending.py", line 19, in test_extending Failed example: hi2 = wordy('Florida') Exception raised: Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest test_extending[6]>", line 1, in <module> hi2 = wordy('Florida') NameError: name 'wordy' is not defined Trying: hi2.greet() Expecting: 'Hello from Florida, where the weather is fine' ********************************************************************** File "/Users/me/Desktop/boost_1_49_0/libs/python/example/quickstart/test_extending.py", line 20, in test_extending Failed example: hi2.greet() Exception raised: Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest test_extending[7]>", line 1, in <module> hi2.greet() NameError: name 'hi2' is not defined Trying: invite(hi2) Expecting: 'Hello from Florida! Please come soon!' ********************************************************************** File "/Users/me/Desktop/boost_1_49_0/libs/python/example/quickstart/test_extending.py", line 22, in test_extending Failed example: invite(hi2) Exception raised: Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/doctest.py", line 1248, in __run compileflags, 1) in test.globs File "<doctest test_extending[8]>", line 1, in <module> invite(hi2) NameError: name 'invite' is not defined 1 items had no tests: test_extending.run ********************************************************************** 1 items had failures: 9 of 9 in test_extending 9 tests in 2 items. 0 passed and 9 failed. ***Test Failed*** 9 failures. *** *** End Screen dump 4 *** If I enter bin/darwin-4.0.1/debug, I get this for ls -al: mes-computer-444:debug me$ ls -al total 2688 drwxr-xr-x 6 me me 204 Mar 9 11:36 . drwxr-xr-x 3 me me 102 Mar 9 11:36 .. -rwxr-xr-x 1 barrygriffin me 164080 Mar 9 11:36 embedding -rw-r--r-- 1 me me 472992 Mar 9 11:36 embedding.o -rw-r--r-- 1 me me 530060 Mar 9 11:36 extending.o -rwxr-xr-x 1 me me 199076 Mar 9 11:36 extending.so Why am I hanging? I'd like to get python3 to work with boost but maybe its best to fix the hanging problem first. Thanks, Barry

2 1

cannot convert from 'const boost::iterator_range<IteratorT>' to 'const std::basic_string<_Elem, _Traits, _Ax>'
by asif saeed 04 Apr '12

04 Apr '12

Hi, I am using Boost 1.47.0 / Windows Server 2003 Standard 32-bit / Visual C++ 2010 Express. I copied/pasted the following code from StackOverFlow and it works: ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// #include <string> #include <iostream> #include <boost/algorithm/string.hpp> int main() { std::string str = "This is a test string"; for( boost::algorithm::split_iterator<std::string::iterator> i = make_split_iterator(str, token_finder( boost::algorithm::is_space(), boost::algorithm::token_compress_on)); i != boost::algorithm::split_iterator<std::string::iterator>(); ++i) { //std::string s = *i; std::cout << *i << '\n'; } } ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// However, when I assign the result of *i to an std::string then I get a compiler conversion error: ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// #include <string> #include <iostream> #include <boost/algorithm/string.hpp> int main() { std::string str = "This is a test string"; for( boost::algorithm::split_iterator<std::string::iterator> i = make_split_iterator(str, token_finder( boost::algorithm::is_space(), boost::algorithm::token_compress_on)); i != boost::algorithm::split_iterator<std::string::iterator>(); ++i) { std::string s = *i; ////////////////////////////COMPILER ERROR: cannot convert from 'const boost::iterator_range<IteratorT>' to 'const std::basic_string<_Elem,_Traits,_Ax>' std::cout << s << '\n'; } } ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// Can anyone guide me as to how I can eliminate this error and convert the result of the dereferenced iterator to string? I need to get an std::string. Thanks in advance, Asif

3 2

[fusion] iterating over a sequence with non-const references
by paul Fultz 04 Apr '12

04 Apr '12

Hi, I would like to iterate over a sequence and preserve the reference/const/non-const of the elements. That is say I have a sequence like this: tuple<int&, int> seq; I would like to this to be true: typeof(deref(begin(seq))) == int& typeof(deref(next(begin(seq)))) == int&& It seems fusion sequences always return a const reference to the element. Is there a workaround to get it to work like this? Or is this just not possible with Boost.Fusion? Furthermore, I would like to use the transformation algorithms (especially push_back, and push_front) and still preserve the reference type. Is that possible, through some workarounds? Finally, would it still be fairly efficient when dealing with references, to copy the tuple and make a new tuple when doing algorithms such as push_back or push_front? Or is the lazy evaluation much more efficient than that? Thanks, Paul Fultz II

3 9