- Boost - lists.boost.org

Custom deleter for ptr_vector?
by Robert Dailey 20 Jan '08

20 Jan '08

Hi, I was wondering it is currently possible to give ptr_vector a custom deleter? This could simply be in the form of a functor. If this feature does not exist, would it be hard to add? For example, you could do this: namespace boost { namespace detail { template< typename t_type > struct default_deleter { void operator() ( t_type* ptr ) { delete ptr; } }; } template< typename t_type, typename t_deleter = detail::default_deleter<t_type> > class ptr_vector { private: std::vector<t_type*> m_pointers; public: ~ptr_vector() { std::for_each( m_pointers.begin(), m_pointers.end(), t_deleter() ); } }; }

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Re: [boost] Boost Serialization of shared_ptr'boost@lists.boost.org'
by Kesseli Pascal 20 Jan '08

20 Jan '08

> Glad to hear that. Please tell my what your compiler environment was. Well, that would be a GCC 3.3.2 Cross-Compiler Toolchain, compiling from WinXP SP2 for Linux Moxa 2.4.18_mvl30-ixdp425 Montavista Embedded Operating System, using Eclipse CDT. > I also appreciate if you could run the whole serialization library test suite > using "library_test". (this is in the trunk/tools ...). I would recommend this > before using this code in production. I would be very interested in the results > and perhaps might find a way to included in the library status table. Uhm, I didn't find any test source or other useful files there. Do I have to download those files seperately or can I get a test code somewhere from? Greeetz Kessi No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.7/1232 - Release Date: 18.01.2008 19:32

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[review] General comment on boost::singleton
by Marcus Lindblom 19 Jan '08

19 Jan '08

Hi, I haven't looked into it at detail, but I've followed the discussion on the singleton's to be or no to be. I think the singleton lib is good as a boost addition, because having many different singleton implementations suck. I also think that boost should encourage good code style. Therefore, I vote for an implementation that both separates the concepts provided (i.e. safe construction, uniqueness, global access & locking). The lib should also provide some kind of unifying scheme, so that the "classic-singleton" can be achieved by applying everything. Also, I think some good motivational documentation on why the classic singleton is not a scalable idea would be appropriate, so that we could get users to think about the orthogonal concepts and whether they really do need all concepts in one go. (Many of us have found out that we only need a subset, after much pain....) Cheers, /Marcus

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[Intrusive] any online docs?
by Thorsten Ottosen 19 Jan '08

19 Jan '08

Hi Ion, I couldn't compile the quick-book docs manually (got wierd error below), but perhaps they are online somewhere? Thanks -Thorsten

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[review request] Boost.Egg, function builders and adaptors
by shunsuke 18 Jan '08

18 Jan '08

Hi, I request my Boost.Egg library be enqueued into the formal review queue. The online document: http://p-stade.sourceforge.net/boost/libs/egg/ The brief description is found at: http://lists.boost.org/Archives/boost/2008/01/132301.php Regards, -- Shunsuke Sogame

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[flyweight] Remainder: Flyweight review will start January 21
by Ion Gaztañaga 18 Jan '08

18 Jan '08

Hi to all, Flyweight library will be reviewed January 21-30. For those interested in the library, this post contains all the information needed for the review: *Author:* Joaquín M. López Muñoz *Description:* Flyweights are small-sized handle classes granting constant access to shared common data, thus allowing for the management of large amounts of entities within reasonable memory limits. Boost.Flyweight makes it easy to use this common programming idiom by providing the class template flyweight<T>, which acts as a drop-in replacement for const T. *Online docs:* http://tinyurl.com/2sstyr http://svn.boost.org/svn/boost/sandbox/flyweight/libs/flyweight/index.html *Download:* http://tinyurl.com/hrdm6 http://www.boost-consulting.com/vault/index.php?&direction=0&order=&directo… *Notes:* 1) We've seen some suggestions in the mailing list for Flyweight. Joaquín has nicely explained a couple of issues that we'd like to address/discuss in the review: http://tinyurl.com/33ghtf http://svn.boost.org/svn/boost/sandbox/flyweight/libs/flyweight/doc/review_… 2) Flyweight needs Boost 1.35 elements because the library depends on libraries like Interprocess for some features/tests. Since SVN snapshot tarballs seem to be missing these days, those who want to try flyweight can download a working SVN-HEAD snapshot here: http://igaztanaga.drivehq.com/boost_trunk.tar.bz2 3) Serialization tests won't work. This feature is expected to work when some new features (discussed in the mailing list between Joaquín and Robert Ramey) are added in Boost.Serialization. Those are expected for Boost 1.36. Regards, Ion

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[smart_ptr] shared_ptr documentation inconsistency
by Frank Mori Hess 18 Jan '08

18 Jan '08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The default shared_ptr constructor, which creates an empty shared_ptr, gives "use_count() == 0" as a post condition. However, the documentation for use_count says it returns "an unspecified nonnegative value when *this is empty". I'd like it to return 0 for an empty shared_ptr, as that appears to be the only way to distinguish an empty shared_ptr from one sharing ownership of a null pointer. - -- Frank -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFHkRr05vihyNWuA4URArScAKCpSzE1iBEP02fn5GJhs3n/rwoItwCgkAxf uRlugdHTVX9TIsZH5swMy70= =9uJe -----END PGP SIGNATURE-----

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[singleton] Design questions
by Peter Dimov 18 Jan '08

18 Jan '08

What is the reason to prefer the current instance/lease formulation instead of typedef ... instance_type; instance_type instance(); // automatically serves as a lease ? (Also, why mutexed_singleton? Mutexed is not a word; synchronized_singleton maybe?) Apologies if these have already been answered. I lost track of the thread. Appalling, I know.

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Bug with timer.hpp?
by Robert Dailey 18 Jan '08

18 Jan '08

Hi, I currently use the latest trunk version of boost. I have the following precompiled header: precompile.h: #include <boost/timer.hpp> When I compile using Visual Studio 2005 on Windows Vista x86, I get the following errors (Note that this is a very long list). I'm not sure why this is happening. If anyone could offer some advice I'd greatly appreciate it. Thank you. 1>c:\program files\microsoft visual studio 8\vc\include\cmath(18) : error C2039: 'acosf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(18) : error C2873: 'acosf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(18) : error C2039: 'asinf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(18) : error C2873: 'asinf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(19) : error C2039: 'atanf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(19) : error C2873: 'atanf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(19) : error C2039: 'atan2f' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(19) : error C2873: 'atan2f' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(19) : error C2039: 'ceilf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(19) : error C2873: 'ceilf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(20) : error C2039: 'cosf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(20) : error C2873: 'cosf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(20) : error C2039: 'coshf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(20) : error C2873: 'coshf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(20) : error C2039: 'expf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(20) : error C2873: 'expf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(21) : error C2039: 'fabsf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(21) : error C2873: 'fabsf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(21) : error C2039: 'floorf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(21) : error C2873: 'floorf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(21) : error C2039: 'fmodf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(21) : error C2873: 'fmodf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(22) : error C2039: 'frexpf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(22) : error C2873: 'frexpf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(22) : error C2039: 'ldexpf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(22) : error C2873: 'ldexpf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(22) : error C2039: 'logf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(22) : error C2873: 'logf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(23) : error C2039: 'log10f' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(23) : error C2873: 'log10f' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(23) : error C2039: 'modff' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(23) : error C2873: 'modff' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(23) : error C2039: 'powf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(23) : error C2873: 'powf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(24) : error C2039: 'sinf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(24) : error C2873: 'sinf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(24) : error C2039: 'sinhf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(24) : error C2873: 'sinhf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(24) : error C2039: 'sqrtf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(24) : error C2873: 'sqrtf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(25) : error C2039: 'tanf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(25) : error C2873: 'tanf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(25) : error C2039: 'tanhf' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(25) : error C2873: 'tanhf' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(27) : error C2039: 'acosl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(27) : error C2873: 'acosl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(27) : error C2039: 'asinl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(27) : error C2873: 'asinl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(28) : error C2039: 'atanl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(28) : error C2873: 'atanl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(28) : error C2039: 'atan2l' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(28) : error C2873: 'atan2l' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(28) : error C2039: 'ceill' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(28) : error C2873: 'ceill' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(29) : error C2039: 'cosl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(29) : error C2873: 'cosl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(29) : error C2039: 'coshl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(29) : error C2873: 'coshl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(29) : error C2039: 'expl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(29) : error C2873: 'expl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(30) : error C2039: 'fabsl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(30) : error C2873: 'fabsl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(30) : error C2039: 'floorl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(30) : error C2873: 'floorl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(30) : error C2039: 'fmodl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(30) : error C2873: 'fmodl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(31) : error C2039: 'frexpl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(31) : error C2873: 'frexpl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(31) : error C2039: 'ldexpl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(31) : error C2873: 'ldexpl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(31) : error C2039: 'logl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(31) : error C2873: 'logl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(32) : error C2039: 'log10l' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(32) : error C2873: 'log10l' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(32) : error C2039: 'modfl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(32) : error C2873: 'modfl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(32) : error C2039: 'powl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(32) : error C2873: 'powl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(33) : error C2039: 'sinl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(33) : error C2873: 'sinl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(33) : error C2039: 'sinhl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(33) : error C2873: 'sinhl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(33) : error C2039: 'sqrtl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(33) : error C2873: 'sqrtl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(34) : error C2039: 'tanl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(34) : error C2873: 'tanl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(34) : error C2039: 'tanhl' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(34) : error C2873: 'tanhl' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(36) : error C2039: 'abs' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(36) : error C2873: 'abs' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(37) : error C2039: 'acos' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(37) : error C2873: 'acos' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(37) : error C2039: 'asin' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(37) : error C2873: 'asin' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(38) : error C2039: 'atan' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(38) : error C2873: 'atan' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(38) : error C2039: 'atan2' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(38) : error C2873: 'atan2' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(38) : error C2039: 'ceil' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(38) : error C2873: 'ceil' : symbol cannot be used in a using-declaration 1>c:\program files\microsoft visual studio 8\vc\include\cmath(39) : error C2039: 'cos' : is not a member of '`global namespace'' 1>c:\program files\microsoft visual studio 8\vc\include\cmath(39) : fatal error C1003: error count exceeds 100; stopping compilation

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Re: [boost] [serialization] failures of test_exported* tests with gcc 4.1 and higher
by Boris Gubenko 18 Jan '08

18 Jan '08

The situation is that with polymorphic base class, serialization library throws an exception. With non-polymorphic base class, the program succeeds. You are, probably, right that while x.cpp in my previous mail and test_exported.cpp throw the same exception, the cause may be different. I tried x.cpp (with polymorphic base class) with aCC instead of gcc and got: aCC runtime: Uncaught exception of type "boost::archive::archive_exception". At the same time, test_exported succeeds with aCC. I'll try serialization library at rrsd.com when I have a chance. In the meantime, do you have any idea why the program might be throwing exception with 1.35? Thanks, Boris Robert Ramey wrote: > One can't invoke any function of the derived class through a base class > pointer unless the base class is polymorphic - that is has at least one > virtual function. > > Serialization is no different in this regard. > > I would not expect the behavior of the program below to > change between version. > > The error message is the same as those failures in test_export > but the cause isn't necessarily the same. > > I would be curious of the version 1.36 serialization library > at rrsd.com would pass tests with gcc 4.1 and higher. > > Robert Ramey > > Boris Gubenko wrote: > > x.cpp below reproduces failures of test_exported* tests on > > several platforms using gcc 4.1 and higher. The tests fail with: > > > > terminate called after throwing an instance of > > 'boost::archive::archive_exception' > > what(): unregistered void cast > > > > When compiled with macro WORKS defined, i.e. when destructor of > > the base class is removed, reproducer succeeds. Does it give any > > clue? > > > > Thanks, > > Boris > > > > x.cpp > > ----- > > #include <fstream> > > #include <boost/archive/binary_oarchive.hpp> > > > > struct polymorphic_base > > { > > template<class Archive> > > void serialize(Archive&, const unsigned int) {} > > #ifndef WORKS > > virtual ~polymorphic_base(){} > > #endif > > }; > > > > struct polymorphic_derived : polymorphic_base > > { > > template<class Archive> > > void serialize(Archive&, const unsigned int) {} > > }; > > > > int main() > > { > > std::ofstream os("x.x"); > > boost::archive::binary_oarchive oa(os); > > polymorphic_base *rb = new polymorphic_derived; > > oa << BOOST_SERIALIZATION_NVP(rb); > > } > > > >

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