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portable uuid generator
by Tim Blechmann 30 Mar '06

30 Mar '06

hi all, working on a crossplatform program at the moment, i'm in need of a portable uuid generator ... currently, i'm using libuuid on linux and i read through the msdn about generating gid, but if there's a uuid class (maybe in boost?) that already does it, it would handy ... thanks ... tim -- TimBlechmann(a)gmx.de ICQ: 96771783 http://www.mokabar.tk You can play a shoestring if you're sincere John Coltrane

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Re: [Boost-users] Using BOOST_STRING_TRIM_HPP to check whethertrim_copy() is available?
by Sohail Somani 30 Mar '06

30 Mar '06

> Hi, > > I've got a header that I'd like to use in both application that use > Boost and in ones that don't. > Is there a define I can use to check whether Boost is available? > In particular, I wish to use boost::trim_copy, but I don't want to > force all files that include my header to use Boost. I'm guessing BOOST_VERSION should be enough. I think all non-trivial boost headers end up including this, but I'm not 100%.

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Using BOOST_STRING_TRIM_HPP to check whether trim_copy() is available?
by Olaf van der Spek 30 Mar '06

30 Mar '06

Hi, I've got a header that I'd like to use in both application that use Boost and in ones that don't. Is there a define I can use to check whether Boost is available? In particular, I wish to use boost::trim_copy, but I don't want to force all files that include my header to use Boost. Olaf

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Re: [Boost-users] Serialization library question
by wayne.x.liu＠jpmchase.com 30 Mar '06

30 Mar '06

Well, I guess I'll work around it for gcc by using register_type(). Wayne ------------------------------ Message: 6 Date: Wed, 29 Mar 2006 20:39:57 -0800 From: "Robert Ramey" <ramey(a)rrsd.com> Subject: Re: [Boost-users] Serialization library question To: boost-users(a)lists.boost.org Message-ID: <e0fnef$aus$1(a)sea.gmane.org> I compiled, linked and executed this exact program on my VC 7.1 setup. I had no problems of any kind Robert Ramey

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[type_traits][regex] VC++ __fastcall /clr
by Edward Diener 30 Mar '06

30 Mar '06

When compiling managed code in VC++ .NET, which is any of the /clr compiler options, the programmer can mix both CLR classes and regular C++ classes. In the regular C++ classes, Boost should work fine. The VC++ macro which tells one that managed code of any kind is being compiled is _MANAGED, which is defined if managed code is being compiled else it is not defined. So when any of the /clr compiler options are being used _MANAGED is defined, else it is not defined. The VC++ compiler issues compiler warning C4561 whenever managed code is being compiled and __fastcall shows up as a calling convention in any way. Obviously the programmer can turn off this warning via a VC++ #pragma, but I am wondering if Boost could not change some of its headers to avoid this warning. In Boost bind and mem_fn, the programmer has to specifically ask for __fastcall support via special Boost macros to have any functions declared with the __fastcall calling convention, so nothing should be done there since it is clearly a programming error if he does so while compiling managed code. However there are two other places in Boost which I have discovered where functions with the __fastcall calling convention are declared without the programmer doing anything. The first, and most cumbersome reagrding warning messages, is in type_traits in the helper header files type_traits\detail\is_mem_fun_pointer_tester.hpp and type_traits\detail\is_function_pointer_tester.hpp. Since many other libraries, lambda in my case recently, uses type_traits, might not these headers be changed so that when VC++ is the compiler and _MANAGED is defined, the __fastcall versions of these helper functions are not declared ? The second, which I have not encountered but which I saw while searching through Boost header code, is in regex\config.h and I do not know, given some other macros there, whether BOOST_REGEX_CALL can ever be __fastcall when compiling with /clr, but if it can perhaps a change can be made there also. I know that it is not the purpose of Boost to try to accomodate C++ .NET programmers creating /clr compilations using Boost, especially when just warnings and not errors are issued. But in this case, using the predefined macro _MANAGED in VC++ and BOOST_MSVC, it would seem this acoomodation could be made. So I would like the Boost developers of type_traits, especially since it is used by so many other Boost libraries, and regex to consider it.

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boost program options cannot accept hex number
by Peng Yu 30 Mar '06

30 Mar '06

I tried to supply a hex number to an unsigned long integer. But it fails. ("code", po::value<unsigned long>(), "Via pattern code") Error message: in option 'code': invalid option value '0x5A' Could you please let me if it is possible to input a hex form integer in the command line? Thanks, Peng

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Problems compiling Serialisation libs because of Spirit problem
by James Hughes 30 Mar '06

30 Mar '06

Hello all, I reported some time ago an issue with trying to compile the Boost libs using an ARM cross compiler. This has just started to have an impact as I wish to try out the Serialisation libs, and these are one of the areas with a compile issue. The following error is repeated over a considerable number of files and seems to indicate a problem with Spirit. I am using the latest release version of Boost (1.33.1)- no patches (are there any?) and a gcc v3.4.3 cross compiler to ARM architecture. Does anyone have any suggestions? I have had no luck figuring it out, but to be honest haven't spent a lot of time on it yet. Rgds James >>>>> gcc-C++-action bin/boost/libs/serialization/build/libboost_serialization.a/gcc/debug/xml_gr ammar.o In file included from /home/jhughes/boost_1_33_1/libs/serialization/build/../src/basic_xml_grammar .ipp:22, from /home/jhughes/boost_1_33_1/libs/serialization/build/../src/xml_grammar.cpp:6 3: /home/jhughes/boost_1_33_1/boost/spirit/core/primitives/numerics.hpp:120: error: declaration of `template<class ScannerT> struct boost::spirit::sign_parser::result' /home/jhughes/boost_1_33_1/boost/spirit/core/parser.hpp:123: error: conflicts with previous declaration `template<class ScannerT> struct boost::spirit::parser<boost::spirit::sign_parser>::result' set -e "/opt/montavista/mobilinux/devkit/arm/iwmmxt_le/bin/iwmmxt_le-g++" -D_REENTRANT -c -Wall -ftemplate-depth-255 -DBOOST_LIB_DIAGNOSTIC=1 -g -O0 -fno-inline -Wno-non-virtual-dtor -Wno-ctor-dtor-privacy -I"bin/boost/libs/serialization/build" -I "/home/jhughes/boost_1_33_1" -o "bin/boost/libs/serialization/build/libboost_serialization.a/gcc/debug/xml_g rammar.o" "/home/jhughes/boost_1_33_1/libs/serialization/build/../src/xml_grammar.cpp" "/opt/montavista/mobilinux/devkit/arm/iwmmxt_le/bin/iwmmxt_le-objcopy" --set-section-flags .debug_str=contents,debug "bin/boost/libs/serialization/build/libboost_serialization.a/gcc/debug/xml_g rammar.o" ...failed gcc-C++-action bin/boost/libs/serialization/build/libboost_serialization.a/gcc/debug/xml_gr ammar.o... <<<<<

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Building boost libraries for x64 platform
by Sergei N. Malyutin 30 Mar '06

30 Mar '06

Hi, I need to use boost libraries under amd64 platform. At the build time of the library boost_thread I've got an error message from the linker that it failed to find an external symbol _InterlockedCompareExchange (this call is used in the source once.cpp). I really have not found this export among system libraries functions. Does this mean that currently the boost cannot be used in this environment? I did not see any limitations on the boost use under x64. May be I missed anything? Any help or links to the required information would be appreciated. Sergei Malyutin _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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[serialization] XML archive limitations?
by Delfin Rojas 30 Mar '06

30 Mar '06

Hello, I would like to know if it is possible to use the serialization lib and the XML archive to serialize into XML attributes instead of XML elements. For example I want to be able to generate something like: <song id="5" title="foo"/> I would also like to know if the order of XML elements is strict. Meaning, if I have the XML: <song> <id>5</id> <name>foo</name> </song> Can I ask the library to de-serialize "name" and then "id"? What if the xml contains extra XML elements that I don't care to de-serialize? Will I get an error processing the archive? If these things are not supported right now, what would it take to support it? New xml archive? Thanks a lot, Delfin Rojas

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Re: [Boost-users] Serialization library question
by wayne.x.liu＠jpmchase.com 30 Mar '06

30 Mar '06

Thanks for the help. The new code works. For my application, I would like to use BOOST_CLASS_EXPORT_GUID to simplify the registration process. Changing the demo code to use EXPORT causes it to core dump. Perhaps I'm not using correctly... Again, help would be appreciated. Wayne Liu #0 0x004a2575 in boost::archive::detail::basic_iarchive_impl::load_preamble () from /cbb/public/wayne/build/lib/libboost_serialization-gcc-1_33_1.so.1.33.1 #1 0x004a30b9 in boost::archive::detail::basic_iarchive_impl::load_pointer () from /cbb/public/wayne/build/lib/libboost_serialization-gcc-1_33_1.so.1.33.1 #2 0x004a2934 in boost::archive::detail::basic_iarchive::load_pointer () from /cbb/public/wayne/build/lib/libboost_serialization-gcc-1_33_1.so.1.33.1 #3 0x0804d989 in boost::archive::detail::load_pointer_type<boost::archive::text_iarchive, bus_stop*>::invoke (ar=@0xbfff7fd0, t=@0xbfff800c) at /cbb/public/wayne/build/include/boost-1_33_1/boost/archive/detail/iserializer.hpp:486 #4 0x0804d8f6 in load<boost::archive::text_iarchive, bus_stop*> (ar=@0xbfff7fd0, t=@0xbfff800c) at /cbb/public/wayne/build/include/boost-1_33_1/boost/archive/detail/iserializer.hpp:572 #5 0x0804d80b in boost::archive::basic_text_iarchive<boost::archive::text_iarchive>::load_override<bus_stop*> (this=0xbfff7fd0, t=@0xbfff800c) at /cbb/public/wayne/build/include/boost-1_33_1/boost/archive/basic_text_iarchive.hpp:64 #6 0x0804d718 in boost::archive::text_iarchive_impl<boost::archive::text_iarchive>::load_override<bus_stop*> (this=0xbfff7fd0, t=@0xbfff800c) at /cbb/public/wayne/build/include/boost-1_33_1/boost/archive/text_iarchive.hpp:64 #7 0x0804d65d in operator>><bus_stop*> (this=0xbfff7fd0, t=@0xbfff800c) at /cbb/public/wayne/build/include/boost-1_33_1/boost/archive/detail/interface_iarchive.hpp:76 #8 0x0804c807 in restore (ss=@0xbfff8070) at test/d3.cpp:138 #9 0x0804cf69 in main (argc=1, argv=0xbfff8274) at test/d3.cpp:180 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 // demo.cpp // // (C) Copyright 2002-4 Robert Ramey - http://www.rrsd.com . // Use, modification and distribution is subject to 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) #include <iomanip> #include <iostream> #include <sstream> #include <string> #include <boost/archive/text_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/serialization/access.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/utility.hpp> #include <boost/serialization/export.hpp> ///////////////////////////////////////////////////////////// // One bus stop // // illustrates serialization of serializable members // class bus_stop { friend class boost::serialization::access; friend std::ostream & operator<<(std::ostream &os, const bus_stop &gp); virtual std::string description() const = 0; int latitude; int longitude; template<class Archive> void serialize(Archive &ar, const unsigned int version) { ar & latitude; ar & longitude; } protected: bus_stop(const int & _lat, const int & _long) : latitude(_lat), longitude(_long) {} public: bus_stop(){} virtual ~bus_stop(){} }; BOOST_IS_ABSTRACT(bus_stop) BOOST_CLASS_EXPORT_GUID(bus_stop, "bus_stop") std::ostream & operator<<(std::ostream &os, const bus_stop &bs) { return os << bs.latitude << bs.longitude << ' ' << bs.description(); } ///////////////////////////////////////////////////////////// // Several kinds of bus stops // // illustrates serialization of derived types // class bus_stop_corner : public bus_stop { friend class boost::serialization::access; std::string street1; std::string street2; virtual std::string description() const { return street1 + " and " + street2; } template<class Archive> void serialize(Archive &ar, const unsigned int version) { // save/load base class information ar & boost::serialization::base_object<bus_stop>(*this); ar & street1 & street2; } public: bus_stop_corner(){} bus_stop_corner(const int & _lat, const int & _long, const std::string & _s1, const std::string & _s2 ) : bus_stop(_lat, _long), street1(_s1), street2(_s2) { } }; BOOST_CLASS_EXPORT_GUID(bus_stop_corner, "bus_stop_corner") class bus_stop_destination : public bus_stop { friend class boost::serialization::access; std::string name; virtual std::string description() const { return name; } template<class Archive> void serialize(Archive &ar, const unsigned int version) { ar & boost::serialization::base_object<bus_stop>(*this) & name; } public: bus_stop_destination(){} bus_stop_destination( const int & _lat, const int & _long, const std::string & _name ) : bus_stop(_lat, _long), name(_name) { } }; BOOST_CLASS_EXPORT_GUID(bus_stop_destination, "bus_stop_destination") void save(const bus_stop * const s, std::stringstream &ss) /* NOTE extra const here !! */ { std::cout << "original"; std::cout << *s; boost::archive::text_oarchive oa(ss); //oa.register_type(static_cast<bus_stop_corner *>(NULL)); //oa.register_type(static_cast<bus_stop_destination *>(NULL)); oa << s; } void restore( std::stringstream &ss) { bus_stop *s; boost::archive::text_iarchive ia(ss); //ia.register_type(static_cast<bus_stop_corner *>(NULL)); //ia.register_type(static_cast<bus_stop_destination *>(NULL)); ia >> s; std::cout << "restored"; std::cout << *s; } int main(int argc, char *argv[]) { // fill in the data // make a few stops bus_stop *bs0 = new bus_stop_corner( 34, 134, "24th Street", "10th Avenue" ); bus_stop *bs1 = new bus_stop_corner( 35, 133, "State street", "Cathedral Vista Lane" ); bus_stop *bs2 = new bus_stop_destination( 35, 133, "White House" ); bus_stop *bs3 = new bus_stop_destination( 35, 133, "Lincoln Memorial" ); { std::stringstream ss; // display the complete schedule save(bs0,ss); restore(ss); } { std::stringstream ss; // display the complete schedule save(bs1,ss); restore(ss); } { std::stringstream ss; // display the complete schedule save(bs2,ss); restore(ss); } { std::stringstream ss; // display the complete schedule save(bs3,ss); restore(ss); } return 0; }

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