April 2013 - Boost-users - lists.preview.boost.org

Errors compiling Boost.Log on OS X
by Rich E 30 Apr '13

30 Apr '13

Hi all, I'm trying to build the recently-added-to-trunk Boost.Log on OS X and smacking into an error when it includes unsupported.cpp. I've google'd around a bit and seen from the macports guys that Boost.Context doesn't currently build for 32-bit architecture, but I can't even get it to build for just 64-bit. Has anyone had success yet with Boost.Log on OS X, or has some insight into how to get this working before it makes it into 1.54? Building with clang against libc++ / C++11, here is the error: clang-darwin.compile.c++ bin.v2/libs/atomic/build/clang-darwin-osx/release/link-static/threading-multi/lockpool.o "xcrun" "clang" "-stdlib=libc++" "-std=c++11" -x c++ -O3 -O3 -finline-functions -Wno-inline -Wall -DBOOST_ALL_NO_LIB=1 -DBOOST_ATOMIC_SOURCE -DNDEBUG -I"." -c -o "bin.v2/libs/atomic/build/clang-darwin-osx/release/link-static/threading-multi/lockpool.o" "libs/atomic/src/lockpool.cpp" RmTemps bin.v2/libs/atomic/build/clang-darwin-osx/release/link-static/threading-multi/libboost_atomic.a(clean) rm -f "bin.v2/libs/atomic/build/clang-darwin-osx/release/link-static/threading-multi/libboost_atomic.a" clang-darwin.archive bin.v2/libs/atomic/build/clang-darwin-osx/release/link-static/threading-multi/libboost_atomic.a "ar" rc "bin.v2/libs/atomic/build/clang-darwin-osx/release/link-static/threading-multi/libboost_atomic.a" "bin.v2/libs/atomic/build/clang-darwin-osx/release/link-static/threading-multi/lockpool.o" "ranlib" -cs "bin.v2/libs/atomic/build/clang-darwin-osx/release/link-static/threading-multi/libboost_atomic.a" common.copy stage/lib/libboost_atomic.a cp "bin.v2/libs/atomic/build/clang-darwin-osx/release/link-static/threading-multi/libboost_atomic.a" "stage/lib/libboost_atomic.a" clang-darwin.compile.c++ bin.v2/libs/system/build/clang-darwin-osx/release/link-static/threading-multi/error_code.o "xcrun" "clang" "-stdlib=libc++" "-std=c++11" -x c++ -O3 -O3 -finline-functions -Wno-inline -Wall -pedantic -DBOOST_ALL_NO_LIB=1 -DBOOST_SYSTEM_STATIC_LINK=1 -DNDEBUG -I"." -c -o "bin.v2/libs/system/build/clang-darwin-osx/release/link-static/threading-multi/error_code.o" "libs/system/src/error_code.cpp" RmTemps bin.v2/libs/system/build/clang-darwin-osx/release/link-static/threading-multi/libboost_system.a(clean) rm -f "bin.v2/libs/system/build/clang-darwin-osx/release/link-static/threading-multi/libboost_system.a" clang-darwin.archive bin.v2/libs/system/build/clang-darwin-osx/release/link-static/threading-multi/libboost_system.a "ar" rc "bin.v2/libs/system/build/clang-darwin-osx/release/link-static/threading-multi/libboost_system.a" "bin.v2/libs/system/build/clang-darwin-osx/release/link-static/threading-multi/error_code.o" "ranlib" -cs "bin.v2/libs/system/build/clang-darwin-osx/release/link-static/threading-multi/libboost_system.a" common.copy stage/lib/libboost_system.a cp "bin.v2/libs/system/build/clang-darwin-osx/release/link-static/threading-multi/libboost_system.a" "stage/lib/libboost_system.a" clang-darwin.compile.c++ bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/chrono.o "xcrun" "clang" "-stdlib=libc++" "-std=c++11" -x c++ -O3 -Wextra -Wno-long-long -Wno-variadic-macros -pedantic -O3 -finline-functions -Wno-inline -Wall -pedantic -DBOOST_ALL_NO_LIB=1 -DBOOST_All_STATIC_LINK=1 -DBOOST_SYSTEM_NO_DEPRECATED -DBOOST_SYSTEM_STATIC_LINK=1 -DNDEBUG -I"." -c -o "bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/chrono.o" "libs/chrono/src/chrono.cpp" clang-darwin.compile.c++ bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/thread_clock.o "xcrun" "clang" "-stdlib=libc++" "-std=c++11" -x c++ -O3 -Wextra -Wno-long-long -Wno-variadic-macros -pedantic -O3 -finline-functions -Wno-inline -Wall -pedantic -DBOOST_ALL_NO_LIB=1 -DBOOST_All_STATIC_LINK=1 -DBOOST_SYSTEM_NO_DEPRECATED -DBOOST_SYSTEM_STATIC_LINK=1 -DNDEBUG -I"." -c -o "bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/thread_clock.o" "libs/chrono/src/thread_clock.cpp" clang-darwin.compile.c++ bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/process_cpu_clocks.o "xcrun" "clang" "-stdlib=libc++" "-std=c++11" -x c++ -O3 -Wextra -Wno-long-long -Wno-variadic-macros -pedantic -O3 -finline-functions -Wno-inline -Wall -pedantic -DBOOST_ALL_NO_LIB=1 -DBOOST_All_STATIC_LINK=1 -DBOOST_SYSTEM_NO_DEPRECATED -DBOOST_SYSTEM_STATIC_LINK=1 -DNDEBUG -I"." -c -o "bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/process_cpu_clocks.o" "libs/chrono/src/process_cpu_clocks.cpp" RmTemps bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/libboost_chrono.a(clean) rm -f "bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/libboost_chrono.a" clang-darwin.archive bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/libboost_chrono.a "ar" rc "bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/libboost_chrono.a" "bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/chrono.o" "bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/thread_clock.o" "bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/process_cpu_clocks.o" "ranlib" -cs "bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/libboost_chrono.a" /usr/bin/ranlib: file: bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/libboost_chrono.a(thread_clock.o) has no symbols ranlib: file: bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/libboost_chrono.a(thread_clock.o) has no symbols common.copy stage/lib/libboost_chrono.a cp "bin.v2/libs/chrono/build/clang-darwin-osx/release/link-static/threading-multi/libboost_chrono.a" "stage/lib/libboost_chrono.a" clang-darwin.compile.c++ bin.v2/libs/context/build/clang-darwin-osx/release/link-static/threading-multi/unsupported.o "xcrun" "clang" "-stdlib=libc++" "-std=c++11" -x c++ -O3 -O3 -finline-functions -Wno-inline -Wall -DBOOST_ALL_NO_LIB=1 -DNDEBUG -I"." -c -o "bin.v2/libs/context/build/clang-darwin-osx/release/link-static/threading-multi/unsupported.o" "libs/context/src/unsupported.cpp" libs/context/src/unsupported.cpp:7:2: error: "platform not supported" #error "platform not supported" ^ 1 error generated. ...failed updating 1 target...

3 8

boost::result_of and pure virtual functor leads to compile error
by oswin krause 30 Apr '13

30 Apr '13

Hi list, I am necountering an error when trying to use boost::result_of on a pure virtual base class. minimal example: struct Test{ typedef int result_type; virtual int operator()(int)=0; }; typedef boost::result_of<Test(int)>::type type; leads with gcc 4.8 (and with every compiler i know of) to the following output: Error: »type name« declared as function returning an abstract class type typedef boost::result_of<Test(int)>::type type; (actually in the original code where this showed up, gcc compiles it just fine only every other compiler fails, but in this very simple example, even gcc get's the message...) Any chance to use result_of in this setting? I clearly can't use the function call syntax here, which is a little bit annoying. Greetings, Oswin

2 2

[Graph] Difference between astar_search and astar_search_tree
by Luis Torres 29 Apr '13

29 Apr '13

I didn't find the A* documentation very clear on this: when should one use astar_search, and when should one use astar_search_tree? Does the distinction have to do with whether the given heuristic is consistent? Thanks, Luis

2 1

boost::serialization throwing “input stream error” on base class ptr XML serialization
by jvetter 26 Apr '13

26 Apr '13

Hello, This seems straight forward to me, but yet I'm stilling getting a input stream error and I don't understand why. The weird part about it is if I un-comment the serialization of the base class in my example it works, otherwise it does not. Here is the code: struct A { virtual ~A() {}; int i1 = 10; friend class boost::serialization::access; template <class Archive> void serialize(Archive& ar, const unsigned int version) { ar & make_nvp("int", i1); } }; struct B : A { virtual ~B() {}; float f1 = 5.0F friend class boost::serialization::access; template <class Archive> void serialize(Archive& ar, const unsigned int version) { ar & boost::serialization::base_object<A>(*this); ar & make_nvp("float", f1); } }; struct C : A { virtual ~C() {}; long l1 = 24; friend class boost::serialization::access; template <class Archive> void serialize(Archive& ar, const unsigned int version) { ar & boost::serialization::base_object<A>(*this); ar & make_nvp("long", l1); } }; //Why do these need to be wrappers?? namespace boost { namespace serialization { template<> struct is_wrapper<A*> : mpl::true_ {}; template<> struct is_wrapper<A> : mpl::true_ {}; template<> struct is_wrapper<const A> : mpl::true_ {}; } } BOOST_SERIALIZATION_ASSUME_ABSTRACT(A); BOOST_CLASS_EXPORT(B) BOOST_CLASS_EXPORT(C) int main(int argc, char** argv) { //A* a = new A(); A* b = new B(); A* c = new C(); //A* a1 = nullptr; A* a2 = nullptr; A* a3 = nullptr; ostringstream ostream; xml_oarchive oarchive(ostream); oarchive /*<< BOOST_SERIALIZATION_NVP(a)*/ << BOOST_SERIALIZATION_NVP(b) << BOOST_SERIALIZATION_NVP(c); istringstream istream(ostream.str()); xml_iarchive iarchive(istream); iarchive /*>> BOOST_SERIALIZATION_NVP(a1)*/ >> BOOST_SERIALIZATION_NVP(a2) >> BOOST_SERIALIZATION_NVP(a3); //delete a; delete b; delete c; //delete a1; delete a2; delete a3; } It's worth mentioning that this is with Boost 1.53 and GCC 4.8.0 w/ --std=c++11. The same code works fine in both cases worth the text and binary archives. I have tried changing the nvp's in the main to have the same key and in the input case no key, but I get the same error. Am I doing something wrong or is there an issue with the xml archive? Thanks, Jaime

3 2

Re: [Boost-users] Boost, MinGW and SjLj
by Archie Campbell 26 Apr '13

26 Apr '13

2013/4/26 Archie Campbell: > Hi, > > I have compiled boost_1_53_0 using bjam on windows with MinGW (gcc-4.6.3). > > I am using CodeBlocks for IDE and have successfully linked against Qt5. > > Attempting to link against libboost_serialization produces undefined > references > to things like sjlj_unwind and archive_exception. > > What's going wrong? Do I need to flag the compiler to change exception > strategy? > > Thanks in advance. > > Archie This occurs when one of the libraries compiled using the not SJLJ build of MinGW. (dwarf, for example) I fixed it, eventually, after much messing around with PATH. The strawberry perl c compiler, an irrelevant sjlj build, had snuck in somewhere along the line and had been picked up by bjam. As it turns out, I had to download TDM-GCC-4.7.1, mingw & sjlj to build against Qt5. Boost, and my engine's code were happy to use Mingw 4.6.2, dwarf build, but once the libraries had compiled alright, complained badly during my code's compilation when I tried gcc 4.7.1. Spent the rest of the day fixing up windows IO and all those enchanting little differences between OS designs :P I now have at least four MinGW toolchains but I'm not looking for trouble. Archie

1 0

[log] Compile error with gcc 4.4.6
by Jason 26 Apr '13

26 Apr '13

I'm trying to compile the Boost trunk with gcc 4.4.6, which is the version currently packaged for the RHEL/CentOS 6.x series. In doing so, I'm running into a compiler error that was documented previously on the SourceForge forum for Boost.Log: http://sourceforge.net/projects/boost-log/forums/forum/710022/topic/6695918 It was indicated there that this was unlikely to be fixed. Is there any kind of workaround available? Even if there was some functionality that didn't work but the library would still build, that would be better. Since the official Boost test platforms go all the way back to gcc 4.1.x, is it reasonable to assume that the library should be able to build on this version? Jason -- View this message in context: http://boost.2283326.n4.nabble.com/log-Compile-error-with-gcc-4-4-6-tp46461… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

Reverse mpl set<>
by Chard 26 Apr '13

26 Apr '13

Please can someone post me the mpl to reverse an mpl::set<>. The mpl::reverse<> meta-function (unsurprisingly) requires a Front Extensible type, but I presume it's possible via a custom inserter. TIA.

3 4

Numerical quadrature in Boost Math and Numerics libraries
by Mingfeng Qiu 26 Apr '13

26 Apr '13

Hi, I've been using the Boost.uBlas library for some time, but new to the mailing list and a novice in scientific computing. I'm sending my first post to ask whether there is a numerical quadrature routine to evaluate 2D integrals. It looks to me that there is no official library for this. Thank you for your help! Mingfeng

2 1

Boost, MinGW and SjLj
by Archie Campbell 26 Apr '13

26 Apr '13

Hi, I have compiled boost_1_53_0 using bjam on windows with MinGW (gcc-4.6.3). I am using CodeBlocks for IDE and have successfully linked against Qt5. Attempting to link against libboost_serialization produces undefined references to things like sjlj_unwind and archive_exception. What's going wrong? Do I need to flag the compiler to change exception strategy? Thanks in advance. Archie

2 1

Using C++ class with namespace in C
by Somostetoi Kilato 25 Apr '13

25 Apr '13

Hi, maybe it is not the best place to ask but at this moment I have no other idea where to go. This question is just a preamble for all the comming, BOOST related, questions of mine. So, I have a C++ class, the Apple, at the moment in the std namespace: class Apple { public: Apple(); void eat_an_apple(int p_bites); private: int bites; // number of bites to eat an apple }; I have a C application, an apple picker, first the header: typedef void CApple; #ifdef __cplusplus extern "C" { #endif CApple* pick_an_apple(); void eat_an_apple(const CApple *p_the_apple, int p_bites); void wash_your_hands(CApple *p_the_apple); #ifdef __cplusplus } // extern "C" #endif and the code, too: #include <stdio.h> #include "ApplePicker.hh" int main() { CApple *the_apple = NULL; the_apple = pick_an_apple(); eat_an_apple(the_apple, 9); wash_your_hands(the_apple); the_apple = NULL; return 0; } My question is, if I want to move my Apple class in a custom namespace, garden, how must I modify my C header and code file? Thank you and all the best, Kilato Somostetoi

3 4

Is weak_ptr lock method thread safe?
by Andrea Galeazzi 25 Apr '13

25 Apr '13

I googled this question but, although there are many discussions about it, I didn't find a clear answer. Can I assume the following piece of code to be thread safe? shared_ptr<T> p1(new XXX); //Main thread weak_ptr<T> wp(sp); //Main thread //Then I run two threads: A and B p1.reset(); //thread A shared_ptr<T> p2 = wp.lock(); // thread B In other words, is lock method atomic in respect to deference of the shared point? -- korg Firma *KORG ITALY SPA* *Via Cagiata, 85 -- 60027 Osimo (AN) - ITALY* *Ph. +39 071 727161 -Fax +39 071 7231228* *P.IVA e Cod. fiscale IT01460580424* *Soggetta al controllo della Società KORG Inc. - Giappone* *Reg. Imprese di n. 212056/1996 del 23/12/96* *REA di Ancona al n. 133105 del 06/12/96* *Capitale sociale Euro 814.253,16 i.v.* Ai sensi del D.Lgs. 30 giugno 2003, n. 196, "Codice in materia di protezione dei dati personali" si precisa che le informazioni contenute nel messaggio sono riservate e destinate esclusivamente alla persona od organizzazione sopra indicata. A chi legge il presente avviso - se non è l'effettivo destinatario, o un dipendente, o la persona responsabile della consegna del messaggio - si notifica che sono proibite copie, distribuzione o divulgazione di quanto in esso contenuto (C.P. 616). Se questo messaggio Vi è pervenuto per errore, Vi preghiamo di informarci immediatamente, di non leggerlo e di distruggerlo. Grazie. /According to Legislative Decree n. 196 of 30 June 2003 about "Personal Data Protection Code" we point out that the information contained in this message may be privileged and confidential and is intended only for the use of the individual entity named above. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this message is strictly prohibited. If you have received this message in error, please notify us immediately and destroy the original message. //Thank you./

5 7

regex instantiation crashes at program exit
by Gianfranco Zuliani 24 Apr '13

24 Apr '13

Hi, I get a crash when trying to instantiate a boost::regex during program shutdown. I've boiled down the code to this: #include <boost/regex.hpp> #include <boost/thread.hpp> struct Object { ~Object() { boost::regex param("a"); } static Object& Instantiate() { static boost::thread_specific_ptr<Object> theObject; if (theObject.get() == 0) theObject.reset(new Object); return *theObject; } }; int main() { Object::Instantiate(); boost::regex param("a"); return 0; } Program exists fine if I comment out the boost::regex instantiation in main. I'm using Boost v. 1.42, Visual Studio 2008 Pro on Windows 7 SP1 64 bit. Test program is 64 bit too. TIA, Gianfranco

2 1

[TypeTraits] Using has_call
by Robert Jones 24 Apr '13

24 Apr '13

Hi Folks I know has_call is not yet part of Boost, but using the implementation from https://github.com/jamboree/boost.has_call with this code #include "boost/type_traits/has_call.hpp" #include <cassert> template<typename Sig, typename F> bool HasCall(F const&) { return boost::has_call<F, Sig>::value; } void DefaultVal(int) {} int main() { assert(HasCall<boost::dont_care(int)>(DefaultVal)); } fails to compile for me, with a template instantiation ambiguity error. Seems the error is triggered by the use of boost::dont_care. Any ideas? Thx, Rob.

2 2

[FunctionTypes] Testing for a general callable type.
by Robert Jones 24 Apr '13

24 Apr '13

Hi All Is there anything in Boost to help me test for a general type being callable with a specific signature? I've found Boost.FuncionTypes, which seems to be confined to *builtin* callable types, but has made me aware that all the const/volatile/reference variations might make a general test more complicated than I first thought. Any pointers much appreciated. Thx, Rob.

6 11

[units] how to use scaled_base_unit?
by Olaf Peter 24 Apr '13

24 Apr '13

Hi, at this time I start to understand boost.units. Following the doc http://www.boost.org/doc/libs/1_53_0/doc/html/boost_units/Units.html#boost_… scaled_units are useful. But I didn't found use cases in the test or examples. E.g. https://svn.boost.org/svn/boost/trunk/libs/units/test/test_output.cpp show how to typedef this, but no usage. I try to map metric/si and imperial/us length to an intrinsic length using integer scale factors to avoid double representation uncertainly. Using BOOST_UNITS_DEFINE_CONVERSION_FACTOR I can convert meter and inch to the intrinsic length. But what about mm/um and thou/mil etc? For this I did consider scaled_base_unit. I like to convert between all of them. Since the dimensions are constant, no runtime conversation are required (as the dollar/euro example it shows). Later area calculations based on the intrinsic length are required, convertible also to metric/si and imperial systems. Thanks, Olaf

2 3

boost interprocess linking problems under windows
by Jonathon Love 24 Apr '13

24 Apr '13

hi, i'm having difficulty compiling my program which uses boost::interprocess under windows. it compiles successfully under OS X. ./debug\enginesync.o: In function `ZN5boost12interprocess6winapi16co_uninitializerD1Ev': C:/progra~1/boost/boost_1_53_0/boost/interprocess/detail/win32_api.hpp:1651: undefined reference to `_imp__CoUninitialize@0' ./debug\enginesync.o: In function `ZN5boost12interprocess6winapi23get_wmi_class_attributeERSbIwSt11char_traitsIwESaIwEEPKwS8_': C:/progra~1/boost/boost_1_53_0/boost/interprocess/detail/win32_api.hpp:1673: undefined reference to `_imp__CoInitializeEx@8' Makefile.Debug:148: recipe for target '..\JASPDesktop.exe' failed C:/progra~1/boost/boost_1_53_0/boost/interprocess/detail/win32_api.hpp:1690: undefined reference to `_imp__CoInitializeSecurity@36' C:/progra~1/boost/boost_1_53_0/boost/interprocess/detail/win32_api.hpp:1700: undefined reference to `_imp__CoCreateInstance@20' C:/progra~1/boost/boost_1_53_0/boost/interprocess/detail/win32_api.hpp:1731: undefined reference to `_imp__CoSetProxyBlanket@32' C:/progra~1/boost/boost_1_53_0/boost/interprocess/detail/win32_api.hpp:1774: undefined reference to `_imp__VariantClear@4' collect2.exe: error: ld returned 1 exit status mingw32-make[2]: *** [..\JASPDesktop.exe] Error 1 i'm using mingw32 gcc 4.7, boost 1.53, under windows xp 32 bit. any assistance would be appreciated. with thanks

2 1

Cpp_int and cpp_dec_float conversion
by Alessandro Tagliapietra 24 Apr '13

24 Apr '13

Hello, is there a way to convert from cpp_int to cpp_dec_float and viceversa? Since I've to use the modulus between two cpp_dec_float which I know they're integers but I need sqrt before and trying to run % with them gives: /usr/local/include/boost/multiprecision/number.hpp: In member function > ‘void boost::multiprecision::number<Backend, > ExpressionTemplates>::do_assign(const Exp&, const > boost::multiprecision::detail::modulus_immediates&) [with Exp = > boost::multiprecision::detail::expression<boost::multiprecision::detail::modulus_immediates, > boost::multiprecision::number<boost::multiprecision::backends::cpp_dec_float<100u, > int, void>, et_on>, > boost::multiprecision::number<boost::multiprecision::backends::cpp_dec_float<100u, > int, void>, et_on>, void, void>, Backend = > boost::multiprecision::backends::cpp_dec_float<100u, int, void>, > boost::multiprecision::expression_template_option ExpressionTemplates = > et_on]’: > /usr/local/include/boost/multiprecision/number.hpp:680: instantiated > from ‘void boost::multiprecision::number<Backend, > ExpressionTemplates>::do_assign(const > boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>&, > const mpl_::true_&) [with tag = > boost::multiprecision::detail::modulus_immediates, Arg1 = > boost::multiprecision::number<boost::multiprecision::backends::cpp_dec_float<100u, > int, void>, et_on>, Arg2 = > boost::multiprecision::number<boost::multiprecision::backends::cpp_dec_float<100u, > int, void>, et_on>, Arg3 = void, Arg4 = void, Backend = > boost::multiprecision::backends::cpp_dec_float<100u, int, void>, > boost::multiprecision::expression_template_option ExpressionTemplates = > et_on]’ > /usr/local/include/boost/multiprecision/number.hpp:134: instantiated > from ‘typename boost::enable_if<boost::is_convertible<typename > boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, > Arg4>::result_type, boost::multiprecision::number<Backend, > ExpressionTemplates> >, boost::multiprecision::number<Backend, > ExpressionTemplates>&>::type boost::multiprecision::number<Backend, > ExpressionTemplates>::operator=(const > boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>&) > [with tag = boost::multiprecision::detail::modulus_immediates, Arg1 = > boost::multiprecision::number<boost::multiprecision::backends::cpp_dec_float<100u, > int, void>, et_on>, Arg2 = > boost::multiprecision::number<boost::multiprecision::backends::cpp_dec_float<100u, > int, void>, et_on>, Arg3 = void, Arg4 = void, Backend = > boost::multiprecision::backends::cpp_dec_float<100u, int, void>, > boost::multiprecision::expression_template_option ExpressionTemplates = > et_on]’ > /usr/local/include/boost/multiprecision/number.hpp:181: instantiated > from ‘boost::multiprecision::number<Backend, > ExpressionTemplates>::number(const > boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, Arg4>&, > typename boost::enable_if_c<boost::is_convertible<typename > boost::multiprecision::detail::expression<tag, Arg1, Arg2, Arg3, > Arg4>::result_type,boost::multiprecision::number<Backend, > ExpressionTemplates> >::value, void>::type*) [with tag = > boost::multiprecision::detail::modulus_immediates, Arg1 = > boost::multiprecision::number<boost::multiprecision::backends::cpp_dec_float<100u, > int, void>, et_on>, Arg2 = > boost::multiprecision::number<boost::multiprecision::backends::cpp_dec_float<100u, > int, void>, et_on>, Arg3 = void, Arg4 = void, Backend = > boost::multiprecision::backends::cpp_dec_float<100u, int, void>, > boost::multiprecision::expression_template_option ExpressionTemplates = > et_on]’ > test.cpp:20: instantiated from here > /usr/local/include/boost/multiprecision/number.hpp:912: error: invalid > application of ‘sizeof’ to incomplete type > ‘boost::STATIC_ASSERTION_FAILURE<false>’ Thanks in advance Best Regards

3 3

HOWTO: Connect Boost Signals & Slots to Qt Signals & Slots
by John Adamson 24 Apr '13

24 Apr '13

Hello everyone, Please find the first in a series of articles here: http://www.oxforddynamics.com/articles/connect_qt_and_boost_signals_and_slo… I hope it will be of use! Moderators: is this type of post is acceptable or not? Please let me know if it isn't and I won't post Boost related HOWTOs here again. Kind Regards, John

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message_queue and libvevent
by Francesco "kurojishi" Berni 23 Apr '13

23 Apr '13

hi, i'm trying to use the boost::interprocess::message_queue class in an event driven software that use for a great part sockets and libevent for the event loop. normally for monitoring of events in this software we use the file descriptor of the PF_UNIX sockets. now, i'm trying to understand if the message_queue generate signals or other events when useing the blocking methods and if there is something i can feed to the event_new() function of libevent. i didn't find anything that give me this information in the doc: http://www.boost.org/doc/libs/1_53_0/doc/html/interprocess/synchronization_… thankss -- Francesco Berni - kurojishi Registered Linux User #512920 GPG: A1FB5252

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[Xpressive] Problem with more than 49 named captures
by michael.donnerer＠googlemail.com 23 Apr '13

23 Apr '13

Hi all, I am having trouble getting more than 49 named captures to work with boost xpressive 1.49.0. I extended the default mark_tag like so: boost::xpressive::mark_tag s10(10); boost::xpressive::mark_tag s11(11); boost::xpressive::mark_tag s12(12); … boost::xpressive::mark_tag s48(48); boost::xpressive::mark_tag s49(49); together with a regular expression that uses these named captures: (skip rather long expression)… (s49= +(boost::xpressive::set[boost::xpressive::range('0','9')|'-'])) This works as long as I stick to only using up to s49, as soon as I start using s50 the regular expression no longer seems to match. Is there anything obvious I am missing before I start digging deeper? Thanks, Mike

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[REVIEW] Boost.Predef
by Joel Falcou 23 Apr '13

23 Apr '13

Hi all, first, I want to apologize for the delay in getting this review results out. Looks like my last email get lost at some point. Anyway, after the initial review of Rene Riviera Boost.Predef, my decision was to Conditionnally Accept Boost.Predef under the request that the comments raised during the review period were addressed. Since then, Rene worked hard on actually making those changes so I now feel confident to announce that Boost.Predef is ACCEPTED as a Boost library. Regards

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boost::wave help?
by Raghavendra Raaghu 23 Apr '13

23 Apr '13

Hi all, I'm a newbie in c++ and i want to use boost::wave library to preprocess a c file. I found a exe file in boost site which works fine. But i want a similar executable/binary for Solaris 10/11.I'm using g++. I've installed boost in both solaris 10 and 11. But how i'm getting a wierd linker error with too big error message. Any help is greatly appreciated. thanks Raghu

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newbie trying use boost using INTEL compilter
by Per Zetterberg 23 Apr '13

23 Apr '13

Dear All, I built boost_1_53_0 using the intel compiler (__INTEL_COMPILER is 1310). It seemed to work great. However, when I try to compile my app (also using intel compiler) I get the following error: ../core/four_multi.cpp(675): error: class "boost::asio::ip::basic_resolver_iterator<boost::asio::ip::tcp>" has no suitable copy constructor The code has previously compiler and worked great using the gcc. Any help would be highly appreciated. BR/ Per Zetterberg

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boost::bind issues
by Littlefield, Tyler 23 Apr '13

23 Apr '13

Hello all: I'm having some issues with boost::bind. I'm using it as normal, but I'm still getting a ton of errors: In file included from staticObject.h:7:0, from staticObject.cpp:6: olc.h: In instantiation of ‘class OlcEntry<boost::function<std::basic_string<char>()__attribute__((const))>, boost::function<void(const std::basic_string<char>&)> >’: staticObject.cpp:160:60: required from here olc.h:43:5: error: ‘OlcEntry<G, S>::_getter’ has incomplete type here's what the specific lines on staticObject.cpp looks like: sgroup->AddEntry(new OlcStringEntry("name", "Sets the name of the object", OF_NORMAL, boost::bind(&StaticObject::GetName, _1), boost::bind(&StaticObject::SetName, _1, _2))); and here's the incomplete type deal. typedef boost::function<std::string () const> StringGetter; typedef boost::function<void (const std::string&)> StringSetter; template <class G, class S> class OlcEntry:public IOlcEntry { protected: G _getter; S _setter; public: OlcEntry(const std::string &name, const std::string &help, FLAG flag, const G& getter, const S& setter) :IOlcEntry(name, help, flag) { _setter = setter; _getter = getter; } ... }; Any ideas/help would be awesome. Thanks, -- Take care, Ty http://tds-solutions.net The aspen project: a barebones light-weight mud engine: http://code.google.com/p/aspenmud He that will not reason is a bigot; he that cannot reason is a fool; he that dares not reason is a slave.

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[serialization] Custom Shared pointer
by Jari 22 Apr '13

22 Apr '13

hi i have couple questions about boost serilazation regarding shared pointers. First off i was wondering if boost::shared_ptr has working serilazation code? if so maybe i can learn from there. What's im trying to do is save fairly simple custom shared-pointer class. All it should take is to save the pointer in the class and ref count as well the Parent variable which is pointer to the parent shared-pointer. what needs to be considered for this? should i disable tracking for the shared-pointer and does the pointer stored in the shared-pointer require some special considerations? thanks.

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