- Boost - lists.boost.org

[Config] Meaning of BOOST_NO_CXX11_HDR_INITIALIZER_LIST
by Michel Morin 10 Mar '12

10 Mar '12

I noticed that BOOST_NO_INITIALIZER_LISTS was replaced by BOOST_NO_CXX11_HDR_INITIALIZER_LIST recently. I have a question related to this change: Does BOOST_NO_CXX11_HDR_INITIALIZER_LIST imply that initializer lists are supported by the compiler? (I guess that the compiler support is checked in a compiler config and the existence of <initializer_list> is checked in a std lib config.) If so, shouldn't the documentation be updated? Regards, Michel

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Boost trunk on Solaris 10 sparc
by Maciej (Matchek) Bliziński 09 Mar '12

09 Mar '12

Hello, I've made an attempt to build Boost from subversion trunk on Solaris 10 on sparc, with gcc-4.6.2. The build didn't succeed, and I'll be looking into ways to make it pass. I've recorded the build in log file which includes all the setup: http://buildfarm.opencsw.org/~maciej/boost-2012-02-29-09-51.log Some highlights: error: No best alternative for libs/context/build/asm_context_sources var/tmp//ccU7e2QF.s: Assembler messages: /var/tmp//ccU7e2QF.s:401: Error: Architecture mismatch on "cas". /var/tmp//ccU7e2QF.s:401: (Requires v9|v9a|v9b; requested architecture is v8.) /opt/csw/lib/gcc/sparc-sun-solaris2.10/4.6.2/include-fixed/sys/feature_tests.h:341:2: error: #error "Compiler or options invalid for pre-UNIX 03 X/Open applications and pre-2001 POSIX applications" In file included from /opt/csw/lib/gcc/sparc-sun-solaris2.10/4.6.2/../../../../include/c++/4.6.2/bits/postypes.h:42:0, from /opt/csw/lib/gcc/sparc-sun-solaris2.10/4.6.2/../../../../include/c++/4.6.2/iosfwd:42, from /opt/csw/lib/gcc/sparc-sun-solaris2.10/4.6.2/../../../../include/c++/4.6.2/ios:39, from /opt/csw/lib/gcc/sparc-sun-solaris2.10/4.6.2/../../../../include/c++/4.6.2/ostream:40, from /opt/csw/lib/gcc/sparc-sun-solaris2.10/4.6.2/../../../../include/c++/4.6.2/iterator:64, from ./boost/next_prior.hpp:15, from ./boost/utility.hpp:17, from ./boost/python/instance_holder.hpp:10, from ./boost/python/object/pointer_holder.hpp:14, from ./boost/python/to_python_indirect.hpp:10, from ./boost/python/converter/arg_to_python.hpp:10, from ./boost/python/call.hpp:15, from ./boost/python/object_core.hpp:14, from ./boost/python/object/enum_base.hpp:8, from libs/python/src/object/enum.cpp:6: There were a couple of other errors, they are in the log file. What the current status of Solaris builds? Is there anyone else building Boost on Solaris 10? Are any of the problems that are in the log file know and possible to work around? Maciej

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Re: [boost] Is there interest in a reusable stream-based console?
by Michael Hava 09 Mar '12

09 Mar '12

> I am interested in your library and seeing it become a part of Boost, > however I agree that history, search, auto-complete, etc being integrated > into the library would be key to making it a more useful addition. I'll look into that… > I can understand the header-only motivation, but have you considered > using SWIG (http://www.swig.org/) to wrap you C++ in your favorite > scripting language and then simply re-using the interactive shell > provided by that language? Honestly not, as providing a way to interop with a scripting language was not part of the original idea… (I'm not even that much a fan of scripting languages…) > (example: http://www.youtube.com/watch?v=VHFu6q1twtE ) Looks nice, but it seems you focused far more on the "programming language aspect" than my original design was. You see I developed my first design based on experience in a product I'm working on in my job, where we offer a console in addition to the GUI for faster input. That console is deeply integrated into the program and was never really designed from the ground up to be reusable… > About the interface, I'm not sure if a command should be defined only by a > simple std::function. I've tried it before but I > wasn't able to make it work as more information were required. Maybe I should have explained that a bit more: the command-class uses a std::function internally to store the callback that's to be executed, it's not a std::function.

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Re: [boost] Is there interest in a reusable stream-based console?
by Michael Hava 09 Mar '12

09 Mar '12

@Julien: I haven't looked into boost::program_options yet, though I don't see a problem in integrating the current design in anything as it's merely a class that reads from a std::basic_istream and writes to a std::basic_ostream whilst calling registered callbacks based on the input… The parameters are currently instances of std::basic_string which are passed to the callback which can than operate on these parameters. On the list of commands thing: I thought about that for a while now and would say that something like Lua would be a perfect solution to be combined with the current design to allow that flexible scripting… @Artyom: I've never before heard about GNU Readline; does that mean that consoles like bash don't offer such a functionality to programs automatically (something that even cmd.exe does)? "Help" is meant to be a short help text on the command, similar to a man-page…

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Is there interest in a reusable stream-based console?
by Michael Hava 09 Mar '12

09 Mar '12

I’ve recently started to design a header-only reusable console-class that’s based on std::iostream. It can be customized by adding a variable amount of “commands”. The implementation is currently based on std::stream and may support any compatible stream as input and output. A typical example of usage would be (excluding namespaces): console c(console::case_sensitive);//create case-sensitive console, that reads commands from std::cin and outputs to std::cout and std::cerr c += command(“Name of command”, “Description of command”, “Extended information on parameters of command”, function);//add command to console, whereas function is a std::function c();//execute console; console is executed until function to stop is called Is there any interest in adding such a library to boost? greetz Michael

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[Config] Patch: clang implemented N3276 decltype
by Michel Morin 08 Mar '12

08 Mar '12

Clang implemented N3276 decltype (which does not require type-completeness of a function call expression) Attached a patch for boost/config/compiler/clang.hpp. BTW, BOOST_NO_DECLTYPE_N3276 needs to be a more descriptive name? Regards, Michel

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workarounf for missing uintptr_t on PGI?
by Oliver Kowalke 08 Mar '12

08 Mar '12

Hi, the PGI compiler (pgi- 11.9) seams not to support intptr_t and uninptr_t. Does boost provide a workaround I'm not aware of? Is the PGI compiler relevant (== does it matter if unit-test fails for PGI but pass GCC, MSVC, INTEL)? Oliver -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de

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Using an element of a class A in a constructor of a class B (reflection with boost::python)
by christophe jean-joseph 07 Mar '12

07 Mar '12

Hello everyone, The situation is as follow. I have a C++ code that I haven't written and that I barely can modified. I am supposed to reflect this code in Python with boost. In the code, I have something looking like this: Class A_Base { A_Base(){}; ~A_Base(){}; Whatever virtual and pure virtual functions; } Class A_Derived{ A_Derived(Type1 arg1,...){whatever instructions;} ~A_Derived(){}; Whatever functions; } Class B { B(A_Base& aBase, double& x){}; ~B(){}; Whatever functions; } In the C++ main, at some point aDerived A_Derived is set, and then B(aDerived, x). I need to reflect that under python. Until now, I have been able, with a simple example, to reflect a function f, which is not a ctor, from a class B using A_Base& as argument type, but I can't figure out how to deal with it for a constructor. Based on: http://wiki.python.org/moin/boost.python/ExportingClasses I am declaring f under both its class B and A_Base as follow: .def("f", &B::f) But when I try this for a constructor as f, it refuse to compile. Anyone got a clue? Thank you very much in advance for any further help.

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[move] [container] [unordered] version 1.49.0 and gcc 3.4.3
by Burt, David 07 Mar '12

07 Mar '12

Dear all I am trying to use boost on the LynxOS-SE 5.0.0 operating system. This has gcc 3.4.3 as the tool chain. To validate the library I am running the regression tests. Previously we have used boost 1.39.0 with some minor patches, 1.49.0 has required fewer patches. However I am stuck with the following problem, if someone could suggest a workaround or identify a patch to the toolchain that I can request to be included by LynuxWorks it would be very much appreciated. The technique used by the move, container & unordered libraries to generate specific implementations of methods based on type characteristics does not work on this compiler. I have included the compiler output from one of the tests. Both of the methods defined in move_helpers are generated for the push_back method even though they should be mutually exclusive and one of them should not be generated based on the SFINAE principal. Thanks David. move - move_algorithm - gcc-lynx Compiler output: ../boost/container/vector.hpp: In instantiation of `boost::container::vector<movable, std::allocator<movable> >': ../libs/move/test/move_algorithm.cpp:19: instantiated from here ../boost/container/vector.hpp:996: error: `template<class BOOST_MOVE_TEMPL_PARAM> typename boost::enable_if_c<(((! boost::is_class<BOOST_MOVE_TEMPL_PARAM>::value) || (! boost::move_detail::is_rv<BOOST_MOVE_TEMPL_PARAM>::value)) && (! boost::is_same<T,BOOST_MOVE_TEMPL_PARAM>::value)), void>::type boost::container::vector::push_back(const BOOST_MOVE_TEMPL_PARAM&) [with BOOST_MOVE_TEMPL_PARAM = BOOST_MOVE_TEMPL_PARAM, T = movable, A = std::allocator<movable>]' and `template<class BOOST_MOVE_TEMPL_PARAM> typename boost::enable_if_c<(( boost::is_class<T>::value && boost::is_same<T,BOOST_MOVE_TEMPL_PARAM>::value) && (! boost::has_move_emulation_enabled<BOOST_MOVE_TEMPL_PARAM>::value)), void>::type boost::container::vector::push_back(const BOOST_MOVE_TEMPL_PARAM&) [with BOOST_MOVE_TEMPL_PARAM = BOOST_MOVE_TEMPL_PARAM, T = movable, A = std::allocator<movable>]' cannot be overloaded ../boost/container/vector.hpp:1117: error: `template<class BOOST_MOVE_TEMPL_PARAM> typename boost::enable_if_c<(((! boost::is_class<BOOST_MOVE_TEMPL_PARAM>::value) || (! boost::move_detail::is_rv<BOOST_MOVE_TEMPL_PARAM>::value)) && (! boost::is_same<T,BOOST_MOVE_TEMPL_PARAM>::value)), boost::container::container_detail::vector_iterator<typename boost::container::allocator_traits<A>::pointer> >::type boost::container::vector::insert(boost::container::container_detail::vector_const_iterator<typename boost::container::allocator_traits<A>::pointer>, const BOOST_MOVE_TEMPL_PARAM&) [with BOOST_MOVE_TEMPL_PARAM = BOOST_MOVE_TEMPL_PARAM, T = movable, A = std::allocator<movable>]' and `template<class BOOST_MOVE_TEMPL_PARAM> typename boost::enable_if_c<(( boost::is_class<T>::value && boost::is_same<T,BOOST_MOVE_TEMPL_PARAM>::value) && (! boost::has_move_emulation_enabled<BOOST_MOVE_TEMPL_PARAM>::value)), boost::container::container_detail::vector_iterator<typename boost::container::allocator_traits<A>::pointer> >::type boost::container::vector::insert(boost::container::container_detail::vector_const_iterator<typename boost::container::allocator_traits<A>::pointer>, const BOOST_MOVE_TEMPL_PARAM&) [with BOOST_MOVE_TEMPL_PARAM = BOOST_MOVE_TEMPL_PARAM, T = movable, A = std::allocator<movable>]' cannot be overloaded ________________________________ Please consider the environment before printing this e-mail. The contents of this e-mail message (including any attachments) are confidential to and are intended to be conveyed for the use of the recipient to whom it is addressed only. If you receive this transmission in error, please notify the sender of this immediately and delete the message from your system. Any distribution, reproduction or use of this message by someone other than recipient is not authorized and may be unlawful.

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Shit. Looks like I broke something
by Marshall Clow 07 Mar '12

07 Mar '12

When I run the status tests; I get the following error [ Revision 77175; gcc 4.2.1; Mac OS X 10.7.3; toolset darwin ] > cd $BOOST/trunk/status > ../b2 > MPI auto-detection failed: unknown wrapper compiler mpic++ > Please report this error to the Boost mailing list: http://www.boost.org > You will need to manually configure MPI support. > Performing configuration checks > > - has_icu builds : no > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:604: in object(main-target)(a)26280.add-alternative from module object(main-target)@26280 > error: default build must be identical in all alternatives > error: main target is ../libs/context/build/asm_context_sources > error: with > error: differing from previous default build <toolset>darwin > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:482: in build-main-targets from module object(project-target)@192 > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:332: in main-target from module object(project-target)@192 > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:397: in find-really from module object(project-target)@192 > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:435: in object(project-target)(a)192.find from module object(project-target)@192 > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:373: in find-really from module object(project-target)@2522 > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:435: in object(project-target)(a)2522.find from module object(project-target)@2522 > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:816: in resolve-reference from module targets > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:833: in targets.generate-from-reference from module targets > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:1217: in generate-dependencies from module object(alias-target-class)@2529 > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:1266: in object(alias-target-class)(a)2529.generate from module object(alias-target-class)@2529 > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:732: in generate-really from module object(main-target)@26276 > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:704: in object(main-target)(a)26276.generate from module object(main-target)@26276 > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:258: in object(project-target)(a)2522.generate from module object(project-target)@2522 > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build/targets.jam:258: in object(project-target)(a)827.generate from module object(project-target)@827 > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/build-system.jam:736: in load from module build-system > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/kernel/modules.jam:283: in import from module modules > /Volumes/EyeFive/Marshall/Sources/boost/trunk/tools/build/v2/kernel/bootstrap.jam:142: in boost-build from module > /Volumes/EyeFive/Marshall/Sources/boost/trunk/boost-build.jam:17: in module scope from module I was building fine; I checked in r77115, which was a bunch of changes in libs/config/test; ran the tests there, all was well. Then I tried a full regression test, and got this. Maybe it was the other changes that were made to build (77190/91/92/93), but they look benign to me. Suggestions on the best way to debug this? -- Marshall Marshall Clow Idio Software <mailto:mclow.lists@gmail.com> A.D. 1517: Martin Luther nails his 95 Theses to the church door and is promptly moderated down to (-1, Flamebait). -- Yu Suzuki

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