April 2005 - Boost - lists.preview.boost.org

Hash float functions - request for help
by Daniel James 11 Apr '05

11 Apr '05

Hello everyone, The hash functional tests have finally made it into the regression summary, but there are a few failures, mainly caused by the float functions. I've committed a couple of fixes that should improve matters, but I could use some help porting them to other compilers/platforms. I've attached a couple of test files, it would be great if you could run them on the compilers and platforms that you have access to and send me the results. It's quite likely that the second test will fail to compile, just let me know if it does. Send the results to me directly, to avoid noise. You'll need to add the boost include path when compiling the tests. The tests try to discover the versions of the float functions for the different float types - if you know of a differently named function for your platform that would be a great help. I guess the proper way to do this would be to add macros and tests to Boost.Config, but it's too near to the release to do that. thanks for any help, Daniel

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logo contest status query
by christopher diggins 11 Apr '05

11 Apr '05

So what's the status on the logo contest, any word on when the results will be tallied? Christopher Diggins

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config/compiler/gcc.hpp: Unknown compiler version
by Peter Simons 11 Apr '05

11 Apr '05

Hi, when using Boost with the latest GCC CVS-HEAD version, I get a warning from <boost/config/compiler/gcc.hpp> at this point: // // versions check: // we don't know gcc prior to version 2.90: #if (__GNUC__ == 2) && (__GNUC_MINOR__ < 90) # error "Compiler not configured - please reconfigure" #endif // // last known and checked version is 4.0 (Pre-release): #if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 0)) # if defined(BOOST_ASSERT_CONFIG) # error "Unknown compiler version - please run the configure tests and report the results" # else # warning "Unknown compiler version - please run the configure tests and report the results" # endif #endif When called with '-v', my GCC reports itself as: gcc-4.1.0 (GCC) 4.1.0 20050329 (experimental) I have also run the configure script and obtained this user configuration file as a result: | // Use this file to define a site and compiler specific | // configuration policy, this version was auto-generated by | // configure on Mon Apr 11 15:26:50 CEST 2005 | // With the following options: | // CXX = g++ | // CXXFLAGS = -I./../.. -I./../../libs/config/test -g -O2 -DBOOST_NO_CONFIG | // LDFLAGS = | // LIBS = -lrt -lm -lpthread | | [...] | | #ifndef BOOST_NO_CONFIG | # define BOOST_NO_CONFIG | #endif | | [...] | | // | // options added by configure: | // | #define BOOST_MSVC6_MEMBER_TEMPLATES | #define BOOST_HAS_UNISTD_H | #define BOOST_HAS_STDINT_H | #define BOOST_HAS_SIGACTION | #define BOOST_HAS_SCHED_YIELD | #define BOOST_HAS_PTHREADS | #define BOOST_HAS_PTHREAD_YIELD | #define BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE | #define BOOST_HAS_PARTIAL_STD_ALLOCATOR | #define BOOST_HAS_NRVO | #define BOOST_HAS_NL_TYPES_H | #define BOOST_HAS_NANOSLEEP | #define BOOST_HAS_LONG_LONG | #define BOOST_HAS_GETTIMEOFDAY | #define BOOST_HAS_DIRENT_H | #define BOOST_HAS_CLOCK_GETTIME | #define BOOST_NO_IS_ABSTRACT I hope this helps in any way. If there's anything else I can do to help getting gcc 4.1.x supported, let me know. Peter

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RE: [errorinfo] RFC
by Don G 11 Apr '05

11 Apr '05

Hi Paul, Thanks for the feedback! My guess without seeing the error messages is the win::result helper class. It (incorrectly) relies on <windows.h> if _WIN32 or __WIN32__ or WIN32 is defined. I've posted a new errorinfo2.zip to the sandbox, but couldn't delete the old version - permission denied :( I don't understand for sure why the code compiled for me. If the current version still doesn't compile, you could try adding <winerror.h> right next to <windows.h> in errorinfo.hpp. Again, thanks! Best, Don --- Paul A Bristow <pbristow(a)hetp.u-net.com> wrote: > A very brief (and probably incompetent) skirmish, with this > somewhat interesting looking idea did not succeed in getting it to > compile under MSVC Express as a pure console application > (no Windows) - clearly not its main application. > > Paul > > Paul A Bristow > Prizet Farmhouse, Kendal, Cumbria UK LA8 8AB > +44 1539 561830 +44 7714 330204 > mailto: pbristow(a)hetp.u-net.com > > > > | -----Original Message----- > | From: boost-bounces(a)lists.boost.org > | [mailto:boost-bounces@lists.boost.org] On Behalf Of Don G > | Sent: 10 April 2005 00:33 > | To: boost > | Subject: [boost] [errorinfo] RFC > | > | Just curious if anyone has had a chance to look at the > errorinfo.zip > | or think about the previous email on this subject. I am looking > at > | putting together a straw man for a general asynchronous library > and > | shared_ptr<errorinfo> would play much better in that space than > | shared_ptr<std::exception>. > | > | Thanks for any feedback! > | > | Best, > | Don > > _______________________________________________ > Unsubscribe & other changes: > http://lists.boost.org/mailman/listinfo.cgi/boost > __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/

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[errorinfo] RFC
by Don G 11 Apr '05

11 Apr '05

Just curious if anyone has had a chance to look at the errorinfo.zip or think about the previous email on this subject. I am looking at putting together a straw man for a general asynchronous library and shared_ptr<errorinfo> would play much better in that space than shared_ptr<std::exception>. Thanks for any feedback! Best, Don __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/

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The state of the review process
by Arkadiy Vertleyb 11 Apr '05

11 Apr '05

Hi all, I am wondering why the review process doesn't seem to be moving since the FSM library was accepted, more than three weeks ago. Can anybody shed some light on this? Regards, Arkadiy

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[Wave]
by Matt Hurd 11 Apr '05

11 Apr '05

Do you think Wave could be used for adding some syntatic sugar that would allow easy compile time programming of strings? If I remember the main issue with such thoughts it was the clumsiness of the typelist of characters. A little non-standard sugar from Wave might solve that. Been thinking about a compile time packet parser and how something like a spirit-like but at compile time would fit the bill. Thoughts? Matt. matthurd(a)acm.org

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[Boost-bugs] [ boost-Bugs-1180413 ] MT seed algorithm needs fix applied
by SourceForge.net 11 Apr '05

11 Apr '05

Bugs item #1180413, was opened at 2005-04-11 10:14 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1180413&group_… Category: random Group: None Status: Open Resolution: None Priority: 5 Submitted By: Daniel van der Zee (oblomovska) Assigned to: Jens Maurer (jmaurer) Summary: MT seed algorithm needs fix applied Initial Comment: The version of Mersenne twister in Boost 1.32 is a reimplementation of the original MT code. That version turned out to have a bug in its seeding algorithm. A description of the bug as well as fixed c implementations can be found at: http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/emt19937ar.html See also: http://lists.boost.org/MailArchives/boost/msg78304.php for a proposed fix to boost::random. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=107586&aid=1180413&group_… ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Boost-bugs mailing list Boost-bugs(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs

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property library
by Stefan Strasser 10 Apr '05

10 Apr '05

Hi, I'd like to know if there is interest in developing a small library for inclusion in boost to emulate properties, something like: struct A{ void SetVar(int a){ cerr << "set " << a << endl; } int GetVar() const{ cerr << "get" << endl; return 0; } BOOST_PROPERTY(A,int,Var,SetVar,GetVar); }; A a; a.Var=3; //calls SetVar here's a proof-of-concept implementation which works with gcc 3.4 and intel cc: #define BOOST_PROPERTY(ClassT,T,name,setter,getter) \ struct _##name##_offset; \ property<T,ClassT,_##name##_offset,&ClassT::setter,&ClassT::getter> name; \ struct _##name##_offset{ \ size_t operator()() const{ \ return (size_t) &((ClassT *)0)->name; \ } \ } template<typename T,typename ClassT,typename offset,void (ClassT::*setter)(T),T (ClassT::*getter)() const> class property{ public: property &operator=(T const &t){ unsigned int temp=(unsigned int)this; temp-=offset()(); ClassT *this_=(ClassT *)temp; (this_->*setter)(t); return *this; } }; Regards, -- Stefan Strasser

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[mpl] BOOST_TYPEOF and real operators
by Andy Little 10 Apr '05

10 Apr '05

Hi again, With BOOST_TYPEOF in place, the mpl operators (boost::mpl::plus etc) could be augmented by actual operators( + etc) As below:---> Whats the point of this? Well first its fun and more legible and second brings mpl further into runtime programming. Maybe also fits in with Alexey Gurtovoys round lambda: http://thread.gmane.org/gmane.comp.lib.boost.devel/77267 /* Example */ #include <boost/utility/enable_if.hpp> #include <boost/typeof/typeof.hpp> #include <boost/mpl/plus.hpp> #include <boost/mpl/int.hpp> #include <boost/mpl/or.hpp> // a useful addition to BOOST_TYPEOF ? #define BOOST_AUTO_TYPEDEF(name, expr) typedef BOOST_TYPEOF(expr) name #define BOOST_AUTO_TYPEDEF_TPL(name, expr) typedef BOOST_TYPEOF_TPL(expr) name namespace boost{namespace mpl { // naive implementation of is_integral for demo only template <typename T> struct is_integral_c :false_{}; template <int N> struct is_integral_c<int_<N> > : true_{}; template <int N> struct is_integral_c<integral_c<int,N> > : true_{}; template <typename Lhs, typename Rhs> typename boost::enable_if< boost::mpl::or_< is_integral_c<Lhs>, is_integral_c<Rhs> >, typename plus<Lhs,Rhs>::type >::type operator + (Lhs lhs, Rhs rhs) { BOOST_AUTO_TYPEDEF_TPL(result, Lhs() + Rhs()); return result() ; }; }}//boost::mpl #include <iostream> int main() { typedef boost::mpl::int_<1> one; typedef boost::mpl::int_<2> two; typedef boost::mpl::int_<3> three; typedef boost::mpl::int_<4> four; BOOST_AUTO_TYPEDEF(result , one() + two() + three() + four() ) ; std::cout << typeid(result).name() <<'\n'; std::cout << one() + two() + three() + four() <<'\n'; } reagrds Andy Little

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