- Boost-users - lists.boost.org

Re: [Boost-users] BOOST_ASSERT and others
by james.jones＠firstinvestors.com 18 Dec '06

18 Dec '06

From: Sebastian Redl <sebastian.redl(a)getdesigned.at> > Maarten Nieber wrote: > > Sorry, I should have checked! > > It should be: > > > > assert( 2 + 2 == 4 && "Adding numbers failed!" ) > > That still won't fire. The concept is flawed. You cannot use assert()s > to print debug messages, because when an assert() prints a message, it > also stops the program. Why won't it fire? Let's say I normally would do this: assert( statement ); If I do this instead: assert( statement && "Statement that 2 + 2 == 4 failed" ); then if "statement" is false, the argument of assert() is false so it fires, and (more importantly), the whole argument, including the diagnostic "Statement that 2 + 2 == 4 failed" is output. Am I missing something? This seems like a clever idea to me (a bit limited, maybe, but useful for prototyping if nothing else). - James Jones Administrative Data Mgmt. Webmaster 375 Raritan Center Pkwy, Suite A Data Architect Edison, NJ 08837

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How get file attributes in boost::filesystem ?
by sidle 18 Dec '06

18 Dec '06

How get file attributes in boost::filesystem ?

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mpl::for_each documentation
by Jens Müller 17 Dec '06

17 Dec '06

Where can I find documentation for mpl::for_each? It's no listed in http://www.boost.org/libs/mpl/doc/refmanual/refmanual_toc.html I'm trying to understand what's going on in graph-tool's graphml-hpp in mutate_graph_impl::set_*_property ...

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building boost-python under cvs (python v2.5)
by craigp 17 Dec '06

17 Dec '06

is there a way to get boost-python (cvs HEAD) built for python v2.5? i can't even seem to specify the library on the command line: >bjam --with-python-root=c:\python25 error: wrong library name 'python-root=c:\python25' in the --with-<library> option. i noticed there was a TODO for getting the python options in the jamfile... is there a work-around for now? thanks, --craig __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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serializing enums (and arrays)
by craigp 17 Dec '06

17 Dec '06

I can't figure out how to override serializating enums (and arrays) - without hacking the source code, that is. save_enum_type is defined in boost/archive/detail/oserializer.hpp, and converts them into ints (btw, would longs be safer?). I tried defining a serialize function and specifying the implementation level to object_serializable, but that didn't work (and given how it's defined and used, there seems to be no way of overriding via template specialization). Perhaps save_enum_type and save_array_type could be put into a separate header (out of the archive/detail and maybe into boost/serialization along with vector.hpp, etc)? BTW, thanks for the great library! --craig ____________________________________________________________________________________ Any questions? Get answers on any topic at www.Answers.yahoo.com. Try it now.

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CircularBuffer from the boost-sandbox
by Luca Cappa 17 Dec '06

17 Dec '06

Hi all, I would like to use the circularbuffer class provided by boost-sandbox, and I would like if someone could tell me which are the rules to include the boost-sandbox files (either the .cpp and the .h) in my building process, i.e. should I copy only the relevant files into the actual boost installation directory, or anything else? Greetings, Luca

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Good guide for using Boost with Visual Studio 2005?
by Laran Evans 16 Dec '06

16 Dec '06

I'm an admitted C++ novice, definitely a VS novice. thanks

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atomic_count default constructor
by Clark S. Cox III 16 Dec '06

16 Dec '06

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 A couple of questions: Is there any rational behind the fact that boost::detail::atomic_count doesn't have a default constructor? For what reason is atomic_count an implementation detail, and not available for general use? (i.e. why is it in boost::detail, and not boost::) - -- Clark S. Cox III clarkcox3(a)gmail.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFgxMRXkPInUR5a8wRApfMAJoCiK/xH7K0u2GZnn3QoEk42bqznwCfQ9r0 s60aQuCL2IC1CB1Xi5uhBqQ= =roHz -----END PGP SIGNATURE-----

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Problems installing: "spawn: No such file or directory"
by Laran Evans 16 Dec '06

16 Dec '06

I've got Python 2.5 installed, PYTHON_ROOT is set to C:\Python25 and PYTHON_VERSION is set to 2.5. I manually created C:\Boost, C:\Boost\lib and C:\Boost\include. I get the error output below when I try to build. How do I get past these? --- C:\Documents and Settings\Me\Desktop\boost_1_33_1>vcvars32 C:\Documents and Settings\Me\Desktop\boost_1_33_1>"C:\Program Files\Mic rosoft Visual Studio 8\Common7\Tools\vsvars32.bat" Setting environment for using Microsoft Visual Studio 2005 x86 tools. C:\Documents and Settings\Me\Desktop\boost_1_33_1>bjam "-sTOOLS=vc-8_0" install ****************************************************** Building Boost.Iostreams with bzip2 support disabled. To enable bzip2, consult the Boost.Iostreams documentation ****************************************************** ****************************************************** Building Boost.Iostreams with zlib and gzip support disabled. To enable zlib and gzip, consult the Boost.Iostreams documentation ****************************************************** Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (and if you don't know what ICU is then you probably don't need it). ...patience... ...patience... ...found 13373 targets... ...updating 4938 targets... MkDir1 bin spawn: No such file or directory C:\Documents and Settings\Me\Desktop\boost_1_33_1>

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Tuple how to get the TYPE of the n-th element?
by Seweryn Habdank-Wojewódzki 16 Dec '06

16 Dec '06

Hi I working with tuples, and that tuples are constructed by K elements. For me interesting are 1-st, 2-nd and 3-rd. 0-th and others not. Inside my procedure I want to know what are the types on the positions 1, 2, 3. How can I get them? The example: somewhere in the code: typedef tuple < std::string, double, double, double, int, std::string > Foo; typedef tuple < std::string, long double, long double, long double, long , std::map<int,std::string> > Bar; My part: template < typename Tuple > // somethink like: typename Tuple::get_type<1> calculate ( Tuple & t ) { // here I need for some calculations know what are the types // on the positions 1,2,3? }; And proposition of usage: calculate ( /*Foo*/ foo ); calculate ( /*Bar*/ bar ); Best regards, -- |\/\/| Seweryn Habdank-Wojewódzki `\/\/'

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