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boost::filesystem: Problem with exists() and wpath (Linux)
by Andreas Henriksson 09 Dec '07

09 Dec '07

Hello Whenever I try to use exists() on a wpath, I get an exception. I'm running Arch Linux, with Boost 1.34.1 and Gcc 4.2.2, if it matters. Here is some code: #include "boost/filesystem.hpp" using namespace boost::filesystem; int main() { wpath test(L"whatever/path"); exists(test); return 0; } Which compiles fine, but gives me this error message on runtime: terminate called after throwing an instance of 'boost::filesystem::basic_filesystem_error<boost::filesystem::basic_path<std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >, boost::filesystem::wpath_traits> >' what(): boost::filesystem::wpath::to_external conversion error Aborted Does anyone know what I am missing here?

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boost::filesystem and mingw
by Lennart Wagner 09 Dec '07

09 Dec '07

Hi, I am using boost v1.34.1 and the "current" version of mingw. I got a problem (and solution) with the filesystem library: If the file convenience.hpp is included multiple times, mingw/gcc says: In function `ZN5boost10filesystem9extensionERKNS0_10basic_pathISsNS0_11path_traitsEEE':C:/Daten/Programme/Dev/boost_1_34_1/include/boost/filesystem/convenience.hpp:58: multiple definition of `boost::filesystem::extension(boost::filesystem::basic_path const&)' obj\Debug\Source\global.o:C:/Daten/Programme/Dev/boost_1_34_1/include/boost/filesystem/convenience.hpp:58: first defined here I can solve that (at least for me), if line 31 in convenience.hpp # define BOOST_FS_FUNC_STRING std::string is changed to # define BOOST_FS_FUNC_STRING inline std::string Another change I did to avoid an anoying warning is in line 45 boost::throw_exception( basic_filesystem_error<Path>( "boost::filesystem::create_directories", ph, -1 ) ); I changed the third parameter to 0, since it is unsigned. Have a nice day, Lennart

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Re: [Boost-users] [serialization] Thread safety
by Marc Viala 09 Dec '07

09 Dec '07

> De la part de Robert Ramey: > > the SVN branch serialization_next_release contains this code. > > However best wait til monday as I need to upload a couple of > tweaks. > > Robert Ramey > > Kim Barrett wrote: > >> I came > >> with a solution that has no locking which was important > >> to me. But its only applicable in some applications > >> and serialization library is one of them. In anycase > >> I would welcome comments from anyone who has > >> interest in looking at it. > > > > I'm interested. Can you provide some pointers to specific places to > > look? I should have some time for this (and the test case for the > > polymorphic archive performance patch) after next week. > I'm interested me too, but is it possible to merge this SVN branch code of serialization (serialization_next_release) w/ the Boost 1.34.1 distribution? Or is it required to download the Boost SVN current trunk? Best regards and thanks you in advance for your support. Marc Viala

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[serialization, boost::function] stateful function objects
by Ruediger Berlich 09 Dec '07

09 Dec '07

Hi there, I have a class that is being serialized in regular intervals. It contains a vector<shared_ptr<somefunctionObject> > . As the somefunctionObject objects can maintain state, I want to be able to serialize them along with the surrounding class. This works fine with the current design. I would find it much more pleasing to replace the above vector e.g. with a vector<boost::function<void(someType)> >. From the program logic this would have the same effect, but would be more elegant. I can not see, though, how serialization would work in this case. As far as I know it is not possible to retrieve the object back from boost::function. And it is also not possible to specify more than one interface to boost::function, e.g. in order to support two operator() with different signatures like this: "boost::function<void(someFunctionObkject), someFunctionObject(void)> f;" If that was possible, I could just give the function object a "clone" function and write my own (de-)serialization code. Any ideas ? Thanks and Best Regards, Ruediger Berlich

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trouble compiling with -m32 or address-model=32
by John Salmon 09 Dec '07

09 Dec '07

I'm trying to build boost_1_34_0 on an x86_64 linux box with a 32-bit address model. After letting configure create a bjam for me, I have tried many variations on the following: tools/jam/src/bin.linux/bjam address-model=64 -d2 release And also: tools/jam/src/bin.linux/bjam cxxflags=-m32 linkflags=-m32 cflags=-m32 -d2 release The -d2 appears to show me what the compiler is doing. I see no sign of -m32 command-line options when the compiler is invoked. I also checked the .so file that was created and verifited that it's dynamically linked to libraries in /lib64. What am I doing wrong?? Here's some of the -d2 output with address-model: salmonj(a)drdws032.nyc$ tools/jam/src/bin.linux/bjam address-model=32 -d2 release Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (don't panic: this is a strictly optional feature). warning: No toolsets are configured. warning: Configuring default toolset "gcc". warning: If the default is wrong, you may not be able to build C++ programs. warning: Use the "--toolset=xxxxx" option to override our guess. warning: For more configuration options, please consult warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html ...patience... ...patience... ...found 4006 targets... ...updating 756 targets... gcc.compile.c++ bin.v2/libs/python/build/gcc-3.4.4/release/address-model-32/threading-multi/type_id.o "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DNDEBUG -I"." -I"/usr/include/python2.3" -c -o "bin.v2/libs/python/build/gcc-3.4.4/release/address-model-32/threading-multi/type_id.o" "libs/python/src/converter/type_id.cpp" gcc.compile.c++ bin.v2/libs/python/build/gcc-3.4.4/release/address-model-32/threading-multi/enum.o "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DNDEBUG -I"." -I"/usr/include/python2.3" -c -o "bin.v2/libs/python/build/gcc-3.4.4/release/address-model-32/threading-multi/enum.o" "libs/python/src/object/enum.cpp" And here's some more with cxxflags/cflags/linkflags: salmonj(a)drdws032.nyc$ tools/jam/src/bin.linux/bjam cflags=32 cxxflags=-m32 linkflags=-m32 -d2 release Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (don't panic: this is a strictly optional feature). warning: No toolsets are configured. warning: Configuring default toolset "gcc". warning: If the default is wrong, you may not be able to build C++ programs. warning: Use the "--toolset=xxxxx" option to override our guess. warning: For more configuration options, please consult warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html ...patience... ...patience... ...found 3994 targets... ...updating 747 targets... MkDir1 bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi mkdir "bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi" gcc.compile.c++ bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi/numeric.o "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DNDEBUG -I"." -I"/usr/include/python2.3" -c -o "bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi/numeric.o" "libs/python/src/numeric.cpp" gcc.compile.c++ bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi/list.o "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DNDEBUG -I"." -I"/usr/include/python2.3" -c -o "bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi/list.o" "libs/python/src/list.cpp" gcc.compile.c++ bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi/long.o "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -fPIC -pthread -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DNDEBUG -I"." -I"/usr/include/python2.3" -c -o "bin.v2/libs/python/build/gcc-3.4.4/release/threading-multi/long.o" "libs/python/src/long.cpp"

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about some boost-config helper script
by François Mauger 08 Dec '07

08 Dec '07

Hi boost users, I'm new in the boost (amazing and powerfull) universe and had no time yet to explore archives about this topic. I have just installed the current version of boost libs on my laptop (no problem with it) but I have not found a dedicated helper config script (i.e. boost-config [--cflags|--libs...]) like the ones coming with the well-known packages used in high-energy physics (GSL, ROOT, CLHEP). It will help a lot if such a script was provided by the build process, at least for Unix-like systems. It is very useful within makefiles or whatever "manual" build scripts. Maybe someone can tell why this feature is not in boost (probably there is a good reason I'm not aware of) or if there are plans to provide it. Thank you very much for your kind comment. best regards frc -- Pr. Francois Mauger Laboratoire de Physique Corpusculaire de Caen et Universite de Caen ENSICAEN - 6, Boulevard du Marechal Juin, 14050 CAEN Cedex, FRANCE e-mail: mauger(a)lpccaen.in2p3.fr tel.: (0/+33) 2 31 45 25 12 fax: (0/+33) 2 31 45 25 49

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boost.proto optimization on MSVC (2005/2008)
by AJD 08 Dec '07

08 Dec '07

Hi, I've been trying out boost.proto lately and I've noticed that for my expressions it tends to force my operands to be created on the stack. For example, instead of optimizing out an object completely when everything about it is known at compile-time, the compiler (MSVC 2005 or 2008) is creating that object on the stack anyway.. even though it's not necessary. Even worse, it actually folds the simpler expressions at compile-time and never even touches the data that it just put on the stack. The problem is compounded with larger expressions involving many operands. It even seems to build the larger expression objects on the stack unnecessarily (and this looks like it starts to break constant folding). Here's some of the generated assembly: int main() { 00401800 sub esp,18h vector2< float[3] > v1 = { 0, 1, 2 }; 00401803 xorps xmm0,xmm0 vector2< float[3] > v2 = { 3, 4, 5 }; vector2< float[3] > v3 = { 6, 7, 8 }; // Add two vectors lazily and get the 2nd element. #if 1 // this sticks temporary junk all over the stack, even with 2 terms std::cout << (v1 + v2)[0]; 00401806 fld dword ptr [__real@40400000 (402128h)] 0040180C movss dword ptr [esp],xmm0 00401811 movss xmm0,dword ptr [__real@3f800000 (402124h)] 00401819 movss dword ptr [esp+4],xmm0 0040181F movss xmm0,dword ptr [__real@40000000 (402120h)] 00401827 movss dword ptr [esp+8],xmm0 0040182D movss xmm0,dword ptr [__real@40400000 (402128h)] 00401835 movss dword ptr [esp+0Ch],xmm0 0040183B movss xmm0,dword ptr [__real@40800000 (40211Ch)] 00401843 push ecx 00401844 mov ecx,dword ptr [__imp_std::cout (402044h)] 0040184A fstp dword ptr [esp] 0040184D movss dword ptr [esp+14h],xmm0 00401853 movss xmm0,dword ptr [__real@40a00000 (402118h)] 0040185B movss dword ptr [esp+18h],xmm0 00401861 call dword ptr [__imp_std::basic_ostream<char,std::char_traits<char> >::operator<< (402040h)] std::cin.get(); 00401867 mov ecx,dword ptr [__imp_std::cin (40203Ch)] 0040186D call dword ptr [__imp_std::basic_istream<char,std::char_traits<char> >::get (402038h)] return 0; 00401873 xor eax,eax } 00401875 add esp,18h 00401878 ret I've come up with a couple workarounds but these only work for specific cases: // (1) This optimizes out nicely, but only works for adding 2 objects. typedef proto::terminal< vector2< float[3] > >::type expr_type; std::cout << (vector_expr< expr_type >( expr_type::make(v1) ) + vector_expr< expr_type >( expr_type::make(v2) ))[0]; // (2) This never optimizes out std::cout << (v1 + v2)[0]; I'd noticed that the reference at traits.hpp line 144 seemed to play a major role (it was the only significant difference between the expression trees generated by the above two snippets.) // (3) This makes (2) optimize just like (1), but doesn't help 3+ // HACK TO REMOVE REF AT boost\xpressive\proto\traits.hpp LINE 144 namespace boost { namespace proto { namespace result_of { template<typename T, typename EnableIf> struct as_arg<T, VectorDomain, EnableIf> { typedef expr<proto::tag::terminal, args0<T /*&*/> > expr_type; typedef typename VectorDomain::template apply<expr_type>::type type; template<typename T2> static type call(T2 &t) { return VectorDomain::make(expr_type::make(t)); } }; }}} Finally, here is the entire source I'm using: #include <cstddef> #include <iostream> #include <boost/xpressive/proto/proto.hpp> #include <boost/xpressive/proto/context.hpp> using namespace boost; template< typename T> struct vector2; template< typename T > struct vector2<T[3]> { T v[3]; typedef T value_type; T const & operator [](std::size_t i) const { return this->v[i]; } T & operator [](std::size_t i) { return this->v[i]; } }; // This grammar describes which lazy vector expressions // are allowed; namely, vector terminals and addition // and subtraction of lazy vector expressions. struct VectorGrammar : proto::or_ < proto::terminal< vector2< proto::_ > > , proto::plus< VectorGrammar, VectorGrammar > > { }; // Expressions in the lazy vector domain must conform // to the lazy vector grammar struct VectorDomain; // Here is an evaluation context that indexes into a lazy vector // expression, and combines the result. struct subscript_context { private: std::size_t i; public: subscript_context(std::size_t i) : i(i) { } // Use default_eval for all the operations ... template< typename Expr, typename Tag = typename Expr::proto_tag > struct eval : proto::default_eval< Expr, subscript_context const > { }; // ... except for terminals, which we index with our subscript template< typename Expr > struct eval< Expr, proto::tag::terminal > { typedef typename proto::result_of::arg< Expr >::type::value_type result_type; result_type operator ()(Expr const & expr, subscript_context const & ctx) const { return proto::arg(expr)[ctx.i]; } }; }; // Here is the domain-specific expression wrapper, which overrides // operator [] to evaluate the expression using the subscript_context. template< typename Expr > struct vector_expr : proto::extends<Expr, vector_expr< Expr >, VectorDomain > { typedef proto::extends< Expr, vector_expr< Expr >, VectorDomain > base_type; vector_expr(Expr const & expr) : base_type(expr) { } // Use the subscript_context to implement subscripting // of a lazy vector expression tree. typename proto::result_of::eval< Expr, subscript_context const >::type operator [](std::size_t i) const { subscript_context const ctx(i); return proto::eval(*this, ctx); } }; // Tell proto that in the VectorDomain, all // expressions should be wrapped in vector_expr<> struct VectorDomain : proto::domain< proto::generator< vector_expr >, VectorGrammar > { }; template< typename T > struct is_vector : mpl::false_ { }; template< typename T > struct is_vector< vector2< T > > : mpl::true_ { }; BOOST_PROTO_DEFINE_BINARY_OPERATOR(+, boost::proto::tag::plus, is_vector, VectorDomain); int main() { vector2< float[3] > v1 = { 0, 1, 2 }; vector2< float[3] > v2 = { 3, 4, 5 }; vector2< float[3] > v3 = { 6, 7, 8 }; // Add two vectors lazily and get the 2nd element. #if 1 // this sticks write-only temporary junk all over the stack, even with 2 terms std::cout << (v1 + v2)[0];// + v3 + v3 + v3 + v3 + v3)[0]; #else // this optimizes out completely for 2 terms... expanding to 3 terms does not typedef proto::terminal< vector2< float[3] > >::type expr_type; std::cout << (vector_expr< expr_type >( expr_type::make(v2) ) + vector_expr< expr_type >( expr_type::make(v3) ))[0]; #endif std::cin.get(); return 0; } Thanks in advance. // AJD < n.outpost(a)gmail.com >

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[serialization] Thread safety
by Ruediger Berlich 08 Dec '07

08 Dec '07

Hi there, I remember that, a few months ago, there was a discussion that Boost.Serialization was currently only thread-safe when using g++ . I cannot find any specific information on this topic, however. I have distinct objects, each of which is serialized in its own (boost) thread and then sent over a network connection and deserialized at the other end. Seems to work fine, without synchronization between different serialization calls. I am using Boost 1.34.1 with Asio 0.3.8, together with threadpool 0.2.4. This is on an OpenSuSE 10.3 box with g++ 4.2.1 . Will I run into trouble when I port this to other compilers + platforms ? Thanks and Best Regards, Ruediger

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BUG ?? Date_time
by paul 08 Dec '07

08 Dec '07

/* There seems to be something wrong with the month() member function of boost::gregorian::date if you valgrind the executable of (*this) source file, you will see that some blocks are "possibly lost" and some are also "still reachable". Yet, were you to comment out the line making use of month(), you would see that valgrind sees no problem with the code. what seems to be the problem ? uname -a = Linux Stanford 2.6.22-14-generic #1 SMP Sun Oct 14 23:05:12 GMT 2007 i686 GNU/Linux */ #include <boost/date_time/gregorian/gregorian.hpp> using namespace boost::gregorian ; #include <iostream> using namespace std ; int main() { date today( day_clock::local_day() ) ; cout << "year = " << today.year() << endl ; cout << "month = " << today.month() << endl ; cout << "day = " << today.day() << endl ; return EXIT_SUCCESS; }

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MSVC 9.0 (2008) config for 1.34.1
by Max Motovilov 08 Dec '07

08 Dec '07

Is there one out there or should I bite the bullet and make my own? Out of the box, 1.34.1 does not seem to recognize the compiler (trial of the final version, distributed by M$ a few days ago). Regards, ...Max...

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[write_graphviz] PropertyWriter and bundled properties
by Michał Nowotka 07 Dec '07

07 Dec '07

In write_graphviz function documentation I can read that PropertyWriter can be used for print both: interior and exterior properties for each vertex of a graph into the graphviz format file. I can find some example of printing graph properties stored in property maps, for example calling: write_graphviz(std::cout, g, make_label_writer(name)); when the graph have 'name' property map. but how to do that when storing properies as bundled properies? I defined following graph: typedef adjacency_list<vecS, vecS, bidirectionalS, Vect_f, Edge_f> Graph; where: struct Vect_f { int factor; int lowlink; int component; int color; bool in_stack; }; struct Edge_f { int num_visited; int color_k; }; and I want to lay out and print my graph with coloured vertexes (I can always change the type of colour property for more suitable if necessary) but I dont't have any idea to do this. Is it possible at all? -- Michał Nowotka

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[Boost][1.34.1] Wrong BOOST_VERSION value in jamrules file
by Andry 07 Dec '07

07 Dec '07

Hello boost-users, Recently i was writing Win32 batch scripts which searches boost directory for version info by grep utility and discovered that Jamrules file in boost installation directory have strange value (from boost_1_34_1.zip): # The current version of Boost. BOOST_VERSION ?= 1.34.0 ; Is this correct value? Or where can i read correct boost version value? -- Best regards, Andry mailto:andry@inbox.ru

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[boost-users] GCC-XML compile errors with boost/mpl/and.hpp
by Jenny Duan (TT) 07 Dec '07

07 Dec '07

Gccxml does not seem to be able to handle the boost/mpl/and.hpp file. I have the most recent gccxml (retrieved the source tree and built it) and 1.34.1 boost. I was told by GCCXML support that boost/config/compiler/gcc_xml.hpp needs to exist in order for GCXXML to process boost header files and this file does exist. Please see the content of it below. Can somebody please tell me why it's not working for me? Your help would be greatly appreciated. Thanks, Jenny ----------------------------------------------------------- // Copyright Aleksey Gurtovoy 2000-2004 // // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // // See http://www.boost.org/libs/mpl for documentation. // $Source: /cvsroot/boost/boost/boost/mpl/and.hpp,v $ // $Date: 2004/09/02 15:40:41 $ // $Revision: 1.5 $ #include <boost/mpl/aux_/config/use_preprocessed.hpp> #if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \ && !defined(BOOST_MPL_PREPROCESSING_MODE) # include <boost/mpl/bool.hpp> # include <boost/mpl/aux_/nested_type_wknd.hpp> # include <boost/mpl/aux_/na_spec.hpp> # include <boost/mpl/aux_/lambda_support.hpp> // agurt, 19/may/04: workaround a conflict with <iso646.h> header's // 'or' and 'and' macros, see http://tinyurl.com/3et69; 'defined(and)' // has to be checked in a separate condition, otherwise GCC complains // about 'and' being an alternative token #if defined(_MSC_VER) #if defined(and) # pragma push_macro("and") # undef and # define and(x) #endif #endif # define BOOST_MPL_PREPROCESSED_HEADER and.hpp # include <boost/mpl/aux_/include_preprocessed.hpp> #if defined(_MSC_VER) #if defined(and) # pragma pop_macro("and") #endif #endif #else # define AUX778076_OP_NAME and_ # define AUX778076_OP_VALUE1 false # define AUX778076_OP_VALUE2 true # include <boost/mpl/aux_/logical_op.hpp> #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #endif // BOOST_MPL_AND_HPP_INCLUDED ------------------------------------------------ $gccxml -fxml-start=./xml_start_symbols.txt --gccxml-gcc-options ./compiler_optons.txt world.h -fxml=world.xml --- snip--- In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:42, from ../common/world.h:33: C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:13: error: ("and" is an alternative token for "&&" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:16: error: missing '(' in expression C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:13: error: ("and" is an alternative token for "&&" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:16: error: missing '(' in expression In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:44, from ../common/world.h:33: C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:13: error: ("or" is an alternative token for "||" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:15: error: missing '(' in expression C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:13: error: ("or" is an alternative token for "||" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:15: error: missing '(' in expression In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/compression.h:28, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/stream_integer_wrapper.h: 32, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:55, from ../common/world.h:33: G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_crt_defs.h:3 2:2: error: #error _USE_32BIT_TIME_T must be defined for TT applications In file included from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/tt_systypes.h:28, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/streamable.h:38, from ../common/world.h:34: G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:3 1:2: error: #error you must include tt_win_defs.h as the first header file in all compilands to ensure correct settings. G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 5:21: error: afx.h: No such file or directory G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 6:24: error: afxwin.h: No such file or directory G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 7:23: error: afxmt.h: No such file or directory In file included from C:/Program Files/Microsoft Visual Studio 8/VC/include/fvec.h:43, from C:/Program Files/Microsoft Visual Studio 8/VC/include/dvec.h:37, from C:/Program Files/Microsoft Visual Studio 8/VC/include/intrin.h:31, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/interlocked.h:29, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/TTCriticalSectionBa se.h:30, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/ttcriticalsection.h :28, from ../common/world.h:38: C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:178:1: error: pasting "&" and "vec" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:178:1: error: pasting "+" and "0" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:179:1: error: pasting "&" and "vec" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:179:1: error: pasting "+" and "1" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:221:1: error: pasting "&" and "vec" does not give a valid preprocessing token --- snip---

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[Boost.Lambda] for_each and cout using placeholder
by Kobi Cohen-Arazi 07 Dec '07

07 Dec '07

Hi Folks, What's wrong with the following simple approach: ---- Start code ---- using boost::lambda; int a[10] std::for_each(a, a+10, std::cout << _1); ---- End code ---- It doesn't compile. What am I missing here? Thanks, -- - Kobi

2 2

[GCC-XML] errors with boost header files
by Jenny Duan (TT) 07 Dec '07

07 Dec '07

Resending this message because the message I sent yesterday didn't get posted on the forum. -----Original Message----- From: Jenny Duan (TT) Sent: Thursday, December 06, 2007 4:42 PM To: 'boost-users(a)lists.boost.org' Subject: [GCC-XML] errors with boost header files Gccxml does not seem to be able to handle the boost/mpl/and.hpp file. I have the most recent gccxml (retrieved the source tree and built it) and 1.34.1 boost. I was told by GCCXML support that boost/config/compiler/gcc_xml.hpp needs to exist in order for GCXXML to process boost header files and this file does exist. Please see the content of it below. Can somebody please tell me why it's not working for me? Your help would be greatly appreciated. Thanks, Jenny ----------------------------------------------------------- // Copyright Aleksey Gurtovoy 2000-2004 // // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // // See http://www.boost.org/libs/mpl for documentation. // $Source: /cvsroot/boost/boost/boost/mpl/and.hpp,v $ // $Date: 2004/09/02 15:40:41 $ // $Revision: 1.5 $ #include <boost/mpl/aux_/config/use_preprocessed.hpp> #if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \ && !defined(BOOST_MPL_PREPROCESSING_MODE) # include <boost/mpl/bool.hpp> # include <boost/mpl/aux_/nested_type_wknd.hpp> # include <boost/mpl/aux_/na_spec.hpp> # include <boost/mpl/aux_/lambda_support.hpp> // agurt, 19/may/04: workaround a conflict with <iso646.h> header's // 'or' and 'and' macros, see http://tinyurl.com/3et69; 'defined(and)' // has to be checked in a separate condition, otherwise GCC complains // about 'and' being an alternative token #if defined(_MSC_VER) #if defined(and) # pragma push_macro("and") # undef and # define and(x) #endif #endif # define BOOST_MPL_PREPROCESSED_HEADER and.hpp # include <boost/mpl/aux_/include_preprocessed.hpp> #if defined(_MSC_VER) #if defined(and) # pragma pop_macro("and") #endif #endif #else # define AUX778076_OP_NAME and_ # define AUX778076_OP_VALUE1 false # define AUX778076_OP_VALUE2 true # include <boost/mpl/aux_/logical_op.hpp> #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #endif // BOOST_MPL_AND_HPP_INCLUDED ------------------------------------------------ $gccxml -fxml-start=./xml_start_symbols.txt --gccxml-gcc-options ./compiler_optons.txt world.h -fxml=world.xml --- snip--- In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:42, from ../common/world.h:33: C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:13: error: ("and" is an alternative token for "&&" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:16: error: missing '(' in expression C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:13: error: ("and" is an alternative token for "&&" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:16: error: missing '(' in expression In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:44, from ../common/world.h:33: C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:13: error: ("or" is an alternative token for "||" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:15: error: missing '(' in expression C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:13: error: ("or" is an alternative token for "||" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:15: error: missing '(' in expression In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/compression.h:28, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/stream_integer_wrapper.h: 32, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:55, from ../common/world.h:33: G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_crt_defs.h:3 2:2: error: #error _USE_32BIT_TIME_T must be defined for TT applications In file included from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/tt_systypes.h:28, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/streamable.h:38, from ../common/world.h:34: G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:3 1:2: error: #error you must include tt_win_defs.h as the first header file in all compilands to ensure correct settings. G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 5:21: error: afx.h: No such file or directory G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 6:24: error: afxwin.h: No such file or directory G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 7:23: error: afxmt.h: No such file or directory In file included from C:/Program Files/Microsoft Visual Studio 8/VC/include/fvec.h:43, from C:/Program Files/Microsoft Visual Studio 8/VC/include/dvec.h:37, from C:/Program Files/Microsoft Visual Studio 8/VC/include/intrin.h:31, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/interlocked.h:29, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/TTCriticalSectionBa se.h:30, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/ttcriticalsection.h :28, from ../common/world.h:38: C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:178:1: error: pasting "&" and "vec" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:178:1: error: pasting "+" and "0" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:179:1: error: pasting "&" and "vec" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:179:1: error: pasting "+" and "1" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:221:1: error: pasting "&" and "vec" does not give a valid preprocessing token --- snip---

1 0

[serialization] How to pass user defined flags?
by Robert Bielik 07 Dec '07

07 Dec '07

When loading an object via serialization I need to be able to load the object in different modes (which has nothing to do with its data). I tried making an ext_xml_wiarchive (inheriting xml_wiarchive) that adds a function to retrieve the mode, but the serialization template functions do not seem to be able to access that function. I know I'm missing something here... :( /R

2 1

[units] Problem building HTML documentation from QuickBook sources
by Torsten Mähne 07 Dec '07

07 Dec '07

Hello, I'm very interested in the Boost.Units library. I've been therefore trying to use the version, which is available from the Boost Sandbox SVN repository (Revision 41778): svn co http://svn.boost.org/svn/boost/sandbox/units boost_units I've no problems using the header-only Boost.Units library in my own small test programs, but I'm struggling to build the reference documentation located in libs/units/doc/. Therefore, I'm currently forced to use the outdated HTML documentation from the mcs_units_v0.7.2.zip archive available from the Boost file vault or read directly the units.qbk source. I'm using Boost.Units together with boost-1.34.1, which is unpacked in a parallel directory: $ ls boost-1.34.1 boost_units on my laptop running Debian Etch: $ uname -a Linux babylon5 2.6.18-5-686 #1 SMP Wed Oct 3 00:12:50 UTC 2007 i686 GNU/Linux $ g++ --version g++ (GCC) 4.1.2 20061115 (prerelease) (Debian 4.1.1-21) After defining the environment variable: BOOST_BUILD_PATH=<absolute_path_to_boost-1.34.1>/tools/build/v2 and creating the following user-config.jam in $BOOST_BUILD_PATH, I was able to build the boost libraries itself, and the HTML and PDF documentation from their Boost.Book and Quickbook sources: #### Begin user-config.jam #### using gcc : 4.1 : g++-4.1 ; using xsltproc : "/usr/bin/xsltproc" ; using boostbook : "/usr/share/xml/docbook/stylesheet/nwalsh/" : "/usr/share/xml/docbook/schema/dtd/4.2" ; using doxygen : "/usr/bin/doxygen" ; using fop : "/usr/bin/fop" : "/usr/lib/jvm/java-6-sun-1.6.0.00" ; ##### End user-config.jam ##### I have to admit that I don't fully understand yet the boost.build system, but I achieved to create the necessary Jamroot file in boost_units/ (my working copy of the units library). It contains only #### Begin of Jamroot #### use-project boost : ../boost-1.34.1 ; ##### End of Jamroot ##### Then I was able to build the tests in libs/units/test and libs/units/test_headers. All tests in tests in libs/units/test and only the test for non_si_units.hpp fails in libs/units/test_headers. Judging from the #define error in this header, it seems to be expected. But running bjam in the libs/units/doc directory fails after outputting several times: runtime error: file /home/maehne/build/boost-1.34.1/tools/boostbook/xsl/docbook.xsl line 338 element element xsl:element: The QName 'xi:include' has no namespace binding in scope in the stylesheet; this is an error, since the namespace was not s pecified by the instruction itself. There are also a lot of warnings like: warning: cannot find header `boost/units/operators.hpp' warning: cannot find header `boost/units/systems/trig.hpp' Cannot find class named 'boost::units::unit' Cannot find class named 'boost::units::quantity' I've seen on the Boost developers mailing list, that there were previously problems with Boost.Book discussed as in the thread from "[units] Boost.Book problems" from August 2007 <http://lists.boost.org/Archives/boost/2007/08/126004.php>. I also tried to use boost-trunk from the SVN repository (revision 41797). But then I seem to run into the same error, which was posted by John Maddock <http://lists.boost.org/Archives/boost/2007/08/126031.php> in the above mentioned thread: Generate XML output for dir /home/torsten/build/boost-units/boost/ Generate XML output for dir /home/torsten/build/boost-units/boost/units/systems/physical_dimensions/ Generate XML output for dir /home/torsten/build/boost-units/boost/units/systems/ Generate XML output for dir /home/torsten/build/boost-units/boost/units/ [1]+ Done rm -f "bin/gcc-4.2.2/debug/dimensions_reference-xml/*.xml" xslt-xsltproc bin/gcc-4.2.2/debug/dimensions_reference-xml.doxygen xslt-xsltproc bin/gcc-4.2.2/debug/dimensions_reference-xml.boostbook warning: failed to load external entity "Reference" cannot parse Reference XML_CATALOG_FILES=../../../../boost-trunk/bin.v2/boostbook_catalog.xml export XML_CATALOG_FILES "/usr/bin/xsltproc" --stringparam boost.doxygen.reftitle ""Dimensions Reference"" --xinclude -o "bin/gcc-4.2.2/debug/dimensions_reference-xml.boostbook" "/home/torsten/build/boost-trunk/tools/boostbook/xsl/doxygen/doxygen2boostbook.xsl" "bin/gcc-4.2.2/debug/dimensions_reference-xml.doxygen" ...failed xslt-xsltproc bin/gcc-4.2.2/debug/dimensions_reference-xml.boostbook... ...skipped <p.>dimensions_reference.xml for lack of <pbin/gcc-4.2.2/debug>dimensions_reference-xml.boostbook... ...skipped <pbin/gcc-4.2.2/debug>units.docbook for lack of <p.>trig_reference.xml... ...skipped <phtml>standalone_HTML.manifest for lack of <pbin/gcc-4.2.2/debug>units.docbook... ...failed updating 7 targets... ...skipped 10 targets... ...updated 64 targets... Exit 1 Am I doing something wrong or am I facing a bug in the Boost.Units, Boost.Book or QuickBook? Could maybe someone, who succeeded to build the Boost.Units documentation, send it to me in HTML or PDF format? Best regards, Torsten Mähne

2 2

Problem in using bundled properties with transitive closure
by abhishek.v＠tcs.com 07 Dec '07

07 Dec '07

Hi I m able to use the transitive closure using simple definition of adj_list as typedef adjacency_list <setS, vecS, bidirectionalS, property <vertex_name_t, std::string>, property <edge_weight_t, int> > Graph; and then calling transitive_closure(g, TC); graph_traits <Graph>::vertex_iterator vi, vend; for (tie(vi, vend) = vertices(TC); vi != vend; ++vi) { file_op << "\n " << vertices_name[*vi] ; } Gives me correct output. o/p :- A B C D Where A,B,C,D represent name of the vertices But when i try to the graph in bundled properties like struct Process { string name; }; typedef adjacency_list <setS, vecS, bidirectionalS,Process, property <edge_weight_t, int> > Graph; transitive_closure(g, TC); graph_traits <Graph>::vertex_iterator vi, vend; for (tie(vi, vend) = vertices(TC); vi != vend; ++vi) { file_op << "\n " << TC[*vi].name ; } Gives me correct output. o/p :- Means in the second case it returns me empty string for the name of the vertices what could be the reason for this. Kindly help Thanks in Advance Abhishek Vyas =====-----=====-----===== Notice: The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail or telephone and immediately and permanently delete the message and any attachments. Thank you

1 0

[BGL] Property Map Types
by David A. Greene 07 Dec '07

07 Dec '07

When I define an adjacency_list with vecS for the VertexList and use bundled properties to store attributes, what is the time complexity of invoking operator[] on the graph object? Is it constant-time, logarithmic or something else? In other words, what's the underlying data structure used to store the mapping from vertex descriptor to bundle? I've been trying to play around with changing this data structure by specializing property_map and property_traits, something like this: // Define the graph and properties class vertex_property_bundle { ... }; // Define the property tag struct vertex_bundle_property_tag { typedef boost::vertex_property_tag kind; }; typedef boost::property<vertex_bundle_property_tag, vertex_property_bundle> vertex_property_type; typedef boost::adjacency_list<boost::vecS, // Out edge list type boost::vecS, // Vertex list type boost::undirectedS, vertex_property_type // Vertex properties // Edge properties > graph_type; // Specialize the graph property map to be a vector for // vecS vertex lists to make lookup faster template<typename EdgeListType, typename DirectedType> struct property_map<boost::adjacency_list< EdgeListType, vecS, DirectedType, vertex_property_type >, vertex_property_type> { typedef boost::adjacency_list< EdgeListType, vecS, DirectedType, vertex_property_type> graph_type; typedef std::vector<vertex_property_type> type; }; template <typename T> struct property_traits<std::vector<T> > { typedef unsigned long int key_type; typedef T value_type; typedef boost::lvalue_property_map_tag category; }; // overloads of the property map functions for vectors template<typename T> void put(vector<T> &pmap, unsigned long int k, const T& val) { if (pmap.size() <= k) { pmap.resize(k); } pmap[k] = val; } template<typename T> T& get(vector<T> &pmap, unsigned long int k) { assert(k < pmap.size() && "Property map overflow"); return pmap[k]; } template<typename T> const T& get(const vector<T> &pmap, unsigned long int k) { assert(k < pmap.size() && "Property map overflow"); return pmap[k]; } This isn't all compiling yet, but am I on the right track? Is this how things should be done for bundled properties? The documentation is very sparse here. I have a code that is spending significant time looking up properties and I'd like to optimize it as much as possible. Thanks for helping. -Dave

3 8

[GCC-XML] errors with boost header files
by Jenny Duan (TT) 06 Dec '07

06 Dec '07

Gccxml does not seem to be able to handle the boost/mpl/and.hpp file. I have the most recent gccxml (retrieved the source tree and built it) and 1.34.1 boost. I was told by GCCXML support that boost/config/compiler/gcc_xml.hpp needs to exist in order for GCXXML to process boost header files and this file does exist. Please see the content of it below. Can somebody please tell me why it's not working for me? Your help would be greatly appreciated. Thanks, Jenny ----------------------------------------------------------- // Copyright Aleksey Gurtovoy 2000-2004 // // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // // See http://www.boost.org/libs/mpl for documentation. // $Source: /cvsroot/boost/boost/boost/mpl/and.hpp,v $ // $Date: 2004/09/02 15:40:41 $ // $Revision: 1.5 $ #include <boost/mpl/aux_/config/use_preprocessed.hpp> #if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \ && !defined(BOOST_MPL_PREPROCESSING_MODE) # include <boost/mpl/bool.hpp> # include <boost/mpl/aux_/nested_type_wknd.hpp> # include <boost/mpl/aux_/na_spec.hpp> # include <boost/mpl/aux_/lambda_support.hpp> // agurt, 19/may/04: workaround a conflict with <iso646.h> header's // 'or' and 'and' macros, see http://tinyurl.com/3et69; 'defined(and)' // has to be checked in a separate condition, otherwise GCC complains // about 'and' being an alternative token #if defined(_MSC_VER) #if defined(and) # pragma push_macro("and") # undef and # define and(x) #endif #endif # define BOOST_MPL_PREPROCESSED_HEADER and.hpp # include <boost/mpl/aux_/include_preprocessed.hpp> #if defined(_MSC_VER) #if defined(and) # pragma pop_macro("and") #endif #endif #else # define AUX778076_OP_NAME and_ # define AUX778076_OP_VALUE1 false # define AUX778076_OP_VALUE2 true # include <boost/mpl/aux_/logical_op.hpp> #endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS #endif // BOOST_MPL_AND_HPP_INCLUDED ------------------------------------------------ $gccxml -fxml-start=./xml_start_symbols.txt --gccxml-gcc-options ./compiler_optons.txt world.h -fxml=world.xml --- snip--- In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:42, from ../common/world.h:33: C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:13: error: ("and" is an alternative token for "&&" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:32:16: error: missing '(' in expression C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:13: error: ("and" is an alternative token for "&&" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/and.hpp:43:16: error: missing '(' in expression In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:44, from ../common/world.h:33: C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:13: error: ("or" is an alternative token for "||" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:33:15: error: missing '(' in expression C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:13: error: operator "defined" requires an identifier C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:13: error: ("or" is an alternative token for "||" in C++) C:/Program Files/boost/boost_1_34_1/boost/mpl/or.hpp:44:15: error: missing '(' in expression In file included from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/compression.h:28, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/stream_integer_wrapper.h: 32, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/helpers.h:55, from ../common/world.h:33: G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_crt_defs.h:3 2:2: error: #error _USE_32BIT_TIME_T must be defined for TT applications In file included from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/tt_systypes.h:28, from G:/corebuilds/7.0.x/misc/stream/1.3/dev/stream/streamable.h:38, from ../common/world.h:34: G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:3 1:2: error: #error you must include tt_win_defs.h as the first header file in all compilands to ensure correct settings. G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 5:21: error: afx.h: No such file or directory G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 6:24: error: afxwin.h: No such file or directory G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/osabstraction/tt_win_defs.h:5 7:23: error: afxmt.h: No such file or directory In file included from C:/Program Files/Microsoft Visual Studio 8/VC/include/fvec.h:43, from C:/Program Files/Microsoft Visual Studio 8/VC/include/dvec.h:37, from C:/Program Files/Microsoft Visual Studio 8/VC/include/intrin.h:31, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/interlocked.h:29, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/TTCriticalSectionBa se.h:30, from G:/corebuilds/7.0.x/misc/coreutils/1.2/dev/coreutils/ttcriticalsection.h :28, from ../common/world.h:38: C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:178:1: error: pasting "&" and "vec" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:178:1: error: pasting "+" and "0" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:179:1: error: pasting "&" and "vec" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:179:1: error: pasting "+" and "1" does not give a valid preprocessing token C:/Program Files/Microsoft Visual Studio 8/VC/include/ivec.h:221:1: error: pasting "&" and "vec" does not give a valid preprocessing token --- snip---

1 0

shared_ptr and -> operator
by Damien Hocking 06 Dec '07

06 Dec '07

All, I'm replacing some standard C++ pointers with shared_ptrs. I've run into a small problem using shared_ptr with a pointer to member. With a really simple class: class TestObject{ public: TestObject():value_(-5.4){} ~TestObject(); double value_; }; Trying this: double TestObject::*dptr = 0; shared_ptr<TestObject> testPtr = shared_ptr<TestObject>(new TestObject()); testPtr->*dptr = 5.7456; On VS2005, I get an error on the ->*: error C2296: '->*' : illegal, left operand has type 'boost::shared_ptr<T>' This line is fine: (*testPtr).*dptr = 5.7456; Can anyone tell me why the compiler isn't converting boost::shared_ptr<TestObject> to a TestObject* through shared_ptr::operator-> ? I can live with dereferencing the testPtr, but I'd like to understand what's going on. Damien

3 3

boost::bind upgrading from 1.33.1 to 1.34.1 problem, part2
by sj＠sjcomp.com 06 Dec '07

06 Dec '07

Hello, Thanks Eric and Peter for the help with my previous question. Now I have another question. 1.34.1 does not allow me to compile the following code (it was fine on 1.33.1): struct CNode {void GetName(){}}; int main(int argc, char **argv){ typedef std::map<int, CNode> TPNodes; TPNodes Children; std::for_each( Children.begin(), Children.end(), boost::bind( &CNode::GetName, // Problem here boost::bind(&TPNodes::value_type::second,_1))); return 0; } I get this error: error C2440: 'argument' : cannot convert from 'const CNode *__w64 ' to 'CNode *const ' c:\src\boost_1_34_1\boost\bind\mem_fn_template.hpp 35 The code works if I have a map with pointers, but if I have instances then I have the error. It looks like I get a const value which was fine when a pointer was used. The question is how do I use algorithm on maps when I want to use only key or value? Thanks. -- Regards, Alexander. http://sjcomp.com

2 1

Boost & Singletons?
by Robert Dailey 05 Dec '07

05 Dec '07

Hi, I was wondering if the boost library had a class that I could derive my classes from to declare a singleton. For example: class MyClass : public boost::singleton<MyClass> {}; Something like that. I noticed there's a singleton.hpp in "boost\pool\detail", however this seems like an odd place for such a common and useful class. I'm actually a bit scared to use anything in a 'detail' folder, as usually (at least to me) that means private code or implementation details (not to be used). Is there a singleton type class in boost to help simplify the process of creating a singleton? Thanks.

5 10

shared_from_this from constructor
by Daniel P Furlani 05 Dec '07

05 Dec '07

Is there a way to call shared_from_this() from a constructor? It seems like a bad idea. Since the object is still being created, it would be difficult for anything to have a shared_ptr to it. And that violates a documented precondition of shared_from_this(): "There must exist at least one shared_ptr instance p that owns t." If it's not possible or just a bad idea, how about a note in the documentation at: http://www.boost.org/libs/smart_ptr/enable_shared_from_this.html to say something like: "Calling shared_from_this from a constructor will not work, since there is no shared_pointer which owns the object."? -dan

1 0

Re: [Boost-users] [asio] how to specify a timeout?
by Andrea Bartoli 05 Dec '07

05 Dec '07

Use an asio::deadline_timer Example: asio::io_service m_ioService; asio::deadline_timer * m_timer; m_timer = new asio::deadline_timer(m_ioService); m_timer->expires_from_now( boost::posix_time::seconds(t) ); m_timer->async_wait( boost::bind(&Foo:handle_timeout, this, asio::placeholders::error) ); asio::async_read( *m_socket, asio::buffer( m_msg.header(), m_msg.header_length() ), boost::bind(&Foo::handle_read_header, this, asio::placeholders::error) ); This is a cut and paste from my code, if it isn't so clear I'll explain deeply. Tks ----- Messaggio originale ----- Da: Arkadiy Vertleyb <vertleyb(a)hotmail.com> A: boost-users(a)lists.boost.org Inviato: Lunedì 3 dicembre 2007, 20:05:15 Oggetto: [Boost-users] [asio] how to specify a timeout? Hi all, Is it possible in asio to supply a timeout for a read/write operation? Thanks, Arkadiy _________________________________________________________________ You keep typing, we keep giving. Download Messenger and join the i’m Initiative now. http://im.live.com/messenger/im/home/?source=TAGLM _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users ___________________________________ L'email della prossima generazione? Puoi averla con la nuova Yahoo! Mail: http://it.docs.yahoo.com/nowyoucan.html

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