February 2008 - Boost-users

HP-UX with GNU
by stacie＠dcindigos.com 21 Feb '08

21 Feb '08

A couple of questions for the HP gurus about Boost on HP-UX with GNU GCC. I see that the development builds target this configuration, but the 1.34 release does not, so I'm not sure that I can even do this with the 1.34 build. I am new to using bjam so be gnetle. Platform: HP-UX, on itanium ia64, 11.23, building for 64 bit linker: hp-ux GCC:4.1.1 Boost:1.34 User config file: using gcc: : :<cxxflags>-mlp64 <linkflags>-mlp64 Is this suffcient, or do I need to indicate the archtiecture (ia64 on itanium) in some way? Threading: gcc.jam indicates that GCC on HP-UX does not support threading. We have built many libraries with threading using GCC so is this an old comment or is it specific to the gnu linker and not HP-UXs. Can I modify a config file to support threading correctly? Failing libs Zlibs and bzlib builds fail. How do I disable building them? Can the build fail and it's not a problem for the rest of the libraries. Do I need to modify any of the source to work correctly? Would I be better off using a development build? Will boost work correctly on HP 11.31? Thanks!

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[variant] Compilation problem : solved
by Olivier Tournaire 20 Feb '08

20 Feb '08

That was my mistake. Forget to #include <string> ... Regards -- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.

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[variant] Compilation problem
by Olivier Tournaire 20 Feb '08

20 Feb '08

Hi all, I am trying to use boost::variant. First of all, I tried to compile and run the example from the documentation (http://www.boost.org/doc/html/variant.html) However, I am having a compilation error. Here it is : C:\Boost\include\boost-1_35\boost\variant\detail\variant_io.hpp(64) : error C2679: '<<' binaire : aucun opérateur trouvé qui accepte un opérande de partie droite de type 'const T1' (ou il n'existe pas de conversion acceptable) --> error C2679: binary '<<' : no operator found which takes a right-hand operand of type 'type' (or there is no acceptable conversion) No '<<' operator for std::string ? Where is my mistake ? Best regards, Olivier -- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.

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Boost 1.35 build problem
by Johan Råde 20 Feb '08

20 Feb '08

I downloaded Boost 1.35 Head from SVN. I built it with the command: bjam --toolset=msvc-7.1 --NO_ZLIB=0 -sZLIB_SOURCE=C:/Qt/3.3.8/src/3rdparty/zlib install Then I tried to rebuild our app. I got the linking error: LINK : fatal error LNK1104: cannot open file 'libboost_serialization-vc71-mt-1_35.lib' The folder C:/Boost/lib does not contain the file libboost_serialization-vc71-mt-1_35.lib. It seems it was not built. The folder contains boost_serialization-vc71-mt-1_35.dll boost_serialization-vc71-mt-1_35.lib boost_serialization-vc71-mt.lib but no other xxx_serialization_yyy libs. The same happens with the other Boost libs, not just with the serialization lib. Does anyone have any idea what the problem might be, or what additional information I should provide? Thank you, Johan Råde

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Re: [Boost-users] HP-UX with GNU
by stacie＠dcindigos.com 20 Feb '08

20 Feb '08

I submitted this question to the boost-build list, which is where I should have sent it originally. I have some questions about how you faked Boost builder out, but I don't want to continue it here. > -------- Original Message -------- > Subject: Re: [Boost-users] HP-UX with GNU > From: raulh39(a)ya.com > Date: Wed, February 20, 2008 3:13 pm > To: boost-users(a)lists.boost.org > > > On Wed, 20 Feb 2008 11:58:19 -0700 > stacie(a)dcindigos.com wrote: > > > > Threading: > > gcc.jam indicates that GCC on HP-UX does not support threading. We have > > built many libraries with threading using GCC so is this an old comment > > or is it specific to the gnu linker and not HP-UXs. Can I modify a > > config file to support threading correctly? > > I can't help for the rest of your questions, but we use GCC+HP-UX+Boost in our work without any problem. > > The only real difference with your environment is that we work in HP-UX 11.23 but on PA-RISC... > > We had to "force" Boost to believe that this environment is OK for building multi-thread versions of the libraries. > As you have said, gcc.jam indicates that GCC on HP-UX does not support threading. > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Why not overloading && and || in bind?
by Jean-Pierre Bergamin 20 Feb '08

20 Feb '08

Hello everyone Is there a reason why boost::bind does not overload the logical operators || and &&? They definitively would come in more handy to build up complicated logical expressions than using the std::logical_and and std::logical_or function objects. Adding... BOOST_BIND_OPERATOR( ||, logical_or ) BOOST_BIND_OPERATOR( &&, logical_and ) ...to the operator definitions in bind.hpp works as expected with the code below (tested with MSVC 2008). So - why not? :-) Regards James ////////////////////////////////////////////////// // Code example: ////////////////////////////////////////////////// struct employee { employee(int id, const string &name) : id(id), name(name) {} int id; string name; }; ostream &operator<<(ostream &o, const employee &e) { o << e.id << " - " << e.name << endl; return o; } typedef vector<employee> emp_container; emp_container staff; staff.reserve(4); staff.push_back(employee(1, "John")); staff.push_back(employee(2, "Paula")); staff.push_back(employee(3, "Sara")); staff.push_back(employee(4, "Geroge")); emp_container::const_iterator e = find_if(staff.begin(), staff.end(), bind(&employee::name, _1) == "Paula" || bind(&employee::name, _1) == "John" || bind(&employee::id, _1) >= 4 ); if (e != staff.end()) { cout << "Found: " << *e << endl; }

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compile problem using multi_index_container
by Dwight Kelly 20 Feb '08

20 Feb '08

Hello, I've encountered a problem compiling code that uses boost multi_index_container. I'm using both Microsoft Visual Studio 2005 and Apple's gcc 4.0.1. Visual Studio was very picky about how I used namespaces. I finally got it working with the code below. The key to success was the 'using namespace boost::multi_index' line. If I attempted to prefix the members directly, eg. typedef typename boost::multi_index::nth_index_const_iterator<0>::type left_const_iterator; or namespace mi=boost::multi_index; typedef typename mi::nth_index_const_iterator<0>::type left_const_iterator; it would fail to compile. However, when I attempt to compile the same code on Mac OS X using gcc 4.0.1 I get the following errors. Does anyone know why? src.cpp:98:error: wrong number of template arguments (1, should be 2) /boost/boost/multi_index_container_fwd.hpp:46: error: provided for 'template<class MultiIndexContainer, int N> struct boost::multi_index::nth_index_const_iterator' src.cpp:98: error: expected ';' before 'left_const_iterator' src.cpp:99: error: wrong number of template arguments (1, should be 2) /boost/boost/multi_index_container_fwd.hpp:46: error: provided for 'template<class MultiIndexContainer, int N> struct boost::multi_index::nth_index_const_iterator' src.cpp:99: error: expected ';' before 'right_const_iterator' -----code---- using namespace boost::multi_index; 88 template<class A, class B=String> 89 class SimpleBiMap : public multi_index_container< 90 pair<A,B>, 91 indexed_by< 92 ordered_unique<member<pair<A,B>, A, &pair<A,B>::first> >, 93 ordered_unique<member<pair<A,B>, B, &pair<A,B>::second> > 94 > > 95 { 96 public: 97 typedef pair<A,B> mytype; 98 typedef typename nth_index_const_iterator<0>::type left_const_iterator; 99 typedef typename nth_index_const_iterator<1>::type right_const_iterator; 100 101 SimpleBiMap(const mytype init[], int N) { 102 for (int i=0; i<N; i++) { 103 insert(init[i]); 104 } 105 } 106 107 left_const_iterator find(const A &key) const { return get<0>().find(key); } 108 right_const_iterator find(const B &key) const { return get<1>().find(key); } 109 110 left_const_iterator left_end() const { return get<0>().end(); } 111 right_const_iterator right_end() const { return get<1>().end(); } 112 113 const B &operator[](const A &key) const { return get<0>().find(key)->second; } 114 const A &operator[](const B &key) const { return get<1>().find(key)->first; } 115 }; ---code--- Thank you, Dwight Kelly Apago, Inc.

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Serialization problem
by christophe loustaunau 20 Feb '08

20 Feb '08

Hello, I try to use serialization of boost. I have started with the exemple of bus stop in XML : http://www.boost.org/libs/serialization/example/demo_xml.cpp I have added to this example a map of 1000 bus_schedule. Then I save this map in a file. And I relaod this file in a new map. This works perfectly in XML, but if I try : binary_iarchive I got an boost::archive::archive_exception at memory location 0x00dfdb40.. I don't understand why It woks in XML and not in binary. I have attached to the mail the source file. If someone could help me It would be great ! Thanks. -- Christophe Loustaunau.

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scope_lock problem
by Bernard Maassen 20 Feb '08

20 Feb '08

Hi all i'm porting a program written in visual studio 2005 to vs 2003, and came to a problem i can't fix. The idea is to have a lock a mutex while a object excists. The code is: template <class B> class BaseReadLockProxy { private: const B& base; typename B::MutexType::scoped_lock baseScoped_lock; public: BaseReadLockProxy(const B& b): base(b), baseScoped_lock( B::MutexType::scoped_lock(b.baseMutex)) { } typename const B::ContainerType& getItems() { return base.getItems(); } ~BaseReadLockProxy() { } }; Where B::MutexType: typedef boost::mutex MutexType; When compiling this gives: e:\stage2\2apl\2aplcore\BaseScopeLockedProxy.h(39) : error C2558: class 'boost::detail::thread::scoped_lock<Mutex>' : no copy constructor available or copy constructor is declared 'explicit' with [ Mutex=boost::mutex ] e:\stage2\2apl\2aplcore\BaseScopeLockedProxy.h(36) : while compiling class-template member function 'doubleapl::BaseReadLockProxy<B>::BaseReadLockProxy(const B &)' with [ B=doubleapl::PRRuleBase ] RuleOption.cpp(112) : see reference to class template instantiation 'doubleapl::BaseReadLockProxy<B>' being compiled with [ B=doubleapl::PRRuleBase ] I know it should work, because it compiles/runs when using visual studio 2005. Does anyone have an idea what could cause this problem? All ideas are welcome, cause i'm totally stuck

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[program_options] Named values
by Igor Mikushkin 20 Feb '08

20 Feb '08

Hi! I cannot find in docs how to create named vales for producing output like shown in this example from docs: $bin/gcc/debug/multiple_sources --help Allows options: Generic options: -v [ --version ] : print version string --help : produce help message Configuration: --optimization n : optimization level -I [ --include-path ] path : include path The "--include-path" option shown above has "path" parameter, what I have is "arg".

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