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[review] Boost.Functional/Factory library result : accepted
by John Torjo 30 Dec '07

30 Dec '07

Hi all, The Boost.Functional/Factory library, submitted by Tobias Schwinger has been *accepted*. Thanks to all reviewers and to all who contributed before the review! We've received 3 reviews, all positive: Larry Evans, Stejan Rajko, and Detlef Wilkening*. *Suggested improvements * *Implementation *- Allocator should be inherited *Docs *- should include some hint about how to overcome the Lvalue constraint on the arguments that's mentioned in the docs: a0...aN - argument LValues to a constructor of T - separate the two templates (factory and value_factory) a little bit more in the introduction so that it reinforces that they are different in usage - better motivation - more detailed examples * note: I consider Detlef's review positive, even though he wanted 3 extensions (in light of Tobias's answer): - Better name for factory: factory_ptr or factory_pointer. - Better motivation for beginners in the docu. - Extension with a third template parameter for e.g. 2 phase construcion. Best, John -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

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Problame in "make"
by Suhas Majale 30 Dec '07

30 Dec '07

Hi, I am new to Boost C++, and want to install it to use Semantic Search engine. I am trying to run "make" but it gives me error when i run make. Please guid eme through this . I am using Cygwin,win XP. Following are the steps I performed. $ tar --bzip2 -xf /path/to/boost_1_34_1.tar.bz2 $ ./configure Building Boost.Jam with toolset gcc... tools/jam/src/bin.cygwinx86/bjam Detecting Python version... 2.5 Detecting Python root... /usr Unicode/ICU support for Boost.Regex?... not found. Backing up existing Boost.Build configuration in user-config.jam.4 Generating Boost.Build configuration in user-config.jam... Generating Makefile... $ make MAKE Version 2.0 Copyright (c) 1987, 1988 Borland International Error makefile 28: Command syntax error Available memory 547555 bytes *** 1 errors in compile *** The content of the Makefile is as follow: BJAM=./tools/jam/src/bin.cygwinx86/bjam BJAM_CONFIG= PREFIX=/usr/local EPREFIX=/usr/local LIBDIR=/usr/local/lib INCLUDEDIR=/usr/local/include LIBS= all: .dummy @echo "$(BJAM) $(BJAM_CONFIG) --user-config=user-config.jam $(LIBS)" @$(BJAM) $(BJAM_CONFIG) --user-config=user-config.jam $(LIBS) || \ echo "Not all Boost libraries built properly." clean: .dummy rm -rf bin.v2 distclean: clean rm -rf Makefile config.log check: .dummy @cd status && ../$(BJAM) $(BJAM_CONFIG) --user-config=../user-config.jam || echo "Some Boost regression tests failed. This is normal for many compilers." install: .dummy @echo "$(BJAM) $(BJAM_CONFIG) --user-config=user-config.jam--prefix=$(PREFIX) --exec-prefix=$(EPREFIX) --libdir=$(LIBDIR) --includedir=$(INCLUDEDIR) $(LIBS) install" @$(BJAM) $(BJAM_CONFIG) --user-config= user-config.jam --prefix=$(PREFIX) --exec-prefix=$(EPREFIX) --libdir=$(LIBDIR) --includedir=$(INCLUDEDIR) $(LIBS) install || echo "Not all Boost libraries built properly." .dummy: Regards, Suhas Majale

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[iostreams] making a symmetric_filter flushable
by Kessner, Darren E. 30 Dec '07

30 Dec '07

Hi there, First of all thank you to Jonathan Turkanis for the iostreams library - it has been very useful. I am using a filter to calculate a hash on data as it is sent to an ostream, using symmetric_filter. The problem is that even when I flush the filtering_ostream, the extra bytes in the symmetric_filter destination buffer aren't flushed out to the sink until the filtering_ostream goes out of scope (or reset() or pop() is called). I found the following in the FAQ: "Note, however, that there is no guarantee that all data written to a filtering_stream will be forwarded to the final Sink until the stream is closed, unless all the Filters in the underlying chain are Flushable." My questions: 1) How does one make a symmetric_filter Flushable? 2) Is this the best way to do this sort of on-the-fly hash calculation? I've included example code below. Thank you in advance for any advice! Darren #include "boost/iostreams/filtering_stream.hpp" #include "boost/iostreams/filter/symmetric.hpp" #include <iostream> using namespace std; class MySymmetricFilter { public: typedef char char_type; bool filter(const char*& src_begin, const char* src_end, char*& dest_begin, char* dest_end, bool flush) { // just copy everything for (; src_begin!=src_end && dest_begin!=dest_end ; ++src_begin, ++dest_begin) *dest_begin = *src_begin; // do some hash calculation on bytes copied return false; } void close() {} }; struct MyFilter : public boost::iostreams::symmetric_filter<MySymmetricFilter> { typedef boost::iostreams::symmetric_filter<MySymmetricFilter> base_type; MyFilter(int bufferSize) : base_type(bufferSize) {} }; int main() { boost::iostreams::filtering_ostream fos; fos.push(MyFilter(40)); // buffer size == 40 fos.push(cout); fos << "The quick brown fox jumps over the lazy dog" << flush; // length == 43 cout << "123456789 "; flush(fos); // no effect? return 0; // prints "The quick brown fox jumps over the lazy 123456789 dog" // last 3 bytes "dog" are printed when fos goes out of scope } Darren Kessner Scientific Programmer Darren.Kessner(a)cshs.org Spielberg Family Center for Applied Proteomics Cedars-Sinai Medical Center http://www.sfcap.cshs.org/ IMPORTANT WARNING: This message is intended for the use of the person or entity to which it is addressed and may contain information that is privileged and confidential, the disclosure of which is governed by applicable law. If the reader of this message is not the intended recipient, or the employee or agent responsible for delivering it to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this information is STRICTLY PROHIBITED. If you have received this message in error, please notify us immediately by calling (310) 423-6428 and destroy the related message. Thank You for your cooperation.

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Bjam Build Modes
by Colin Diesh 29 Dec '07

29 Dec '07

I am trying to build a boost library and I would get the error from the auto linker Error 2 fatal error C1189: #error : "Mixing a dll boost library with a static runtime is a really bad idea..." c:\bin\boost 1.34.1\boost\config\auto_link.hpp 287 So I changed to a multithreaded dll runtime and I get the error Error 1 fatal error LNK1104: cannot open file 'boost_log-vc80-mt-gd-1_34_1.lib' But when I build my boost library bjam /boost/xxx/build/ It creates a hierarchy like c:\bin\boost 1.34.1\bin.v2 └───libs └───xxx └───build └───msvc-8.0express └───debug └───link-static ........................... libboost_xxx-vc80-gd-1_34_1.lib ........................... libboost_xxx-vc80-gd-1_34_1.lib.rsp Clearly, I did not have the multithreaded versions, and I can not figure out what options, what definitions, what anything, to build all install stage or whatever The Jamfile is overtly simple project boost/xxx; : requirements <include>$(BOOST_ROOT) <link>static <link>shared:<define>BOOST_LOG_SOURCE : usage-requirements <link>shared:<define>BOOST_DATE_TIME_DYN_LINK=1 : source-location ../src ; LOG_SOURCES = blah blah blah; lib boost_xxx : ../src/$(LOG_SOURCES).cpp ; ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping

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[python] Errors on build Boost.Python with ICL 8.1
by Mazay 29 Dec '07

29 Dec '07

Hello, all. I have encountered compile errors on attempt to add Python support to an existing boost installation. Configuration: boost 1.33.1 Intel C++ Compiler 8.1.018 for Windows Python 2.5 // --------Build script (icc_python.bat): ------------- SET INTEL_BASE_MSVC_TOOLSET=vc-7_1 SET TOOLS=intel-win32 SET INTEL_PATH=c:\Install\Intel\CPP\Compiler80\Ia32 SET INTEL_VERSION=81 SET PYTHON_VERSION= 2.5 SET PYTHON_ROOT=C:\Install\Python25 bjam --prefix=C:\prg\boost --with-python install 1>icc_python.log 2>icc_python.err //----- end of build script --------- The following errors occur: C:\prg\boost_1_33_1\boost/python/converter/pyobject_traits.hpp(33): error: expression must have a constant value BOOST_PYTHON_BUILTIN_OBJECT_TRAITS(Type); ^ detected during instantiation of class "boost::python::converter::pyobject_traits<PyTypeObject>" at line 33 C:\prg\boost_1_33_1\boost/python/converter/pyobject_traits.hpp(34): error: expression must have a constant value BOOST_PYTHON_BUILTIN_OBJECT_TRAITS(List); ^ detected during instantiation of class "boost::python::converter::pyobject_traits<PyListObject>" at line 34 C:\prg\boost_1_33_1\boost/python/converter/pyobject_traits.hpp(35): error: expression must have a constant value BOOST_PYTHON_BUILTIN_OBJECT_TRAITS(Int); ^ detected during instantiation of class "boost::python::converter::pyobject_traits<PyIntObject>" at line 35 ..................... and so on .......... I've made some investigation of the issue. The error occur in file pyobject_traits.hpp in this code: # define BOOST_PYTHON_BUILTIN_OBJECT_TRAITS(T) \ template <> struct pyobject_traits<Py##T##Object> \ : pyobject_type<Py##T##Object, &Py##T##_Type> {} // This is not an exhaustive list; should be expanded. BOOST_PYTHON_BUILTIN_OBJECT_TRAITS(Type); //line 33 BOOST_PYTHON_BUILTIN_OBJECT_TRAITS(List); //line 34 BOOST_PYTHON_BUILTIN_OBJECT_TRAITS(Int); //line 35 BOOST_PYTHON_BUILTIN_OBJECT_TRAITS(Long); BOOST_PYTHON_BUILTIN_OBJECT_TRAITS(Dict); BOOST_PYTHON_BUILTIN_OBJECT_TRAITS(Tuple); Variables PyType_Type, PyList_Type, PyInt_Type and etc has type PyTypeObject and defined in Python include files in the following way: PyAPI_DATA(PyTypeObject) PyList_Type; PyAPI_DATA is a macro. In this case it unrolls in the code: extern __declspec(dllimport) PyTypeObject PyList_Type; So we have the following code after preprocessing: extern __declspec(dllimport) PyTypeObject PyList_Type; template <> struct pyobject_traits<PyListObject> : pyobject_type<PyListObject, &PyList_Type> {}; and it causes error: expression must have a constant value I tried to explicitly change PyList_Type declaration to: extern __declspec(dllimport) const PyTypeObject PyList_Type; but it didn't change anything. Google didn't tell me anything useful so this list is my last resort. Please, help. Best regards, Ded Mazay.

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Problem with Math Toolkit
by Michael S 28 Dec '07

28 Dec '07

I have found online documentation for a new version of the Math Toolkit, dedicated to Statistical Distributions and Functions (the link to the documentation is: http://freespace.virgin.net/boost.regex/toolkit/html/index.html ). Apparently this version was reviewed back in April 2007 (see http://archives.free.net.ph/message/20070411.155456.8e65c9d8.en.html) Unfortunately, these functions are not included in the latest distribution of Boost available online, and are not in the Boost Vault. Does anyone know where can I get them? Thanks! Michael _________________________________________________________________ i’m is proud to present Cause Effect, a series about real people making a difference. http://im.live.com/Messenger/IM/MTV/?source=text_Cause_Effect

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[Boost.Spirit] problem with parsing
by Michał Nowotka 28 Dec '07

28 Dec '07

Hello, I'm currently writing simple server implementation and want to parse GET request header and load passed attributes. I though with boost spirit this will be very simple task but i got some errors I can't understand. My function (these are my first lines of code using spirit): bool GET_parse(std::string &str, std::vector<std::string> &keys, std::vector<std::string> &values) { using namespace boost::spirit; uint_parser<unsigned,10,1,1> my_digit; rule<> request,method,path,version_id,stri,web_sign,attribs; request = method >> path >> version_id; method = as_lower_d["get"];//method = str_p["GET"]; version_id = str_p("HTTP") >> ch_p('/') >> my_digit >> ch_p('.') >> my_digit; path = ch_p('/') >> !(stri >> *(ch_p('/') >> stri) >> !(ch_p('?') >> attribs)); stri = +(web_sign); web_sign = alnum_p | ch_p('_') | ch_p('_') | ch_p('.'); attribs = *((+alnum_p)[push_back_a(keys)] >> ch_p('=') >> (+alnum_p)[push_back_a(values)] >> !ch_p('&')); return parse(str.c_str(), request, space_p).full; } and output (for me totally unreadable): In member function 'typename boost::spirit::parser_result<DerivedT, ScannerT>::type boost::spirit::impl::rule_base<DerivedT, EmbedT, T0, T1, T2>::parse_main(const ScannerT&) const [with ScannerT = boost::spirit::scanner<const char*, boost::spirit::scanner_policies<boost::spirit::skipper_iteration_policy<boost::spirit::iteration_policy>, boost::spirit::match_policy, boost::spirit::action_policy> >, DerivedT = boost::spirit::rule<boost::spirit::nil_t, boost::spirit::nil_t, boost::spirit::nil_t>, EmbedT = const boost::spirit::rule<boost::spirit::nil_t, boost::spirit::nil_t, boost::spirit::nil_t>&, T0 = boost::spirit::nil_t, T1 = boost::spirit::nil_t, T2 = boost::spirit::nil_t]': /usr/include/boost/spirit/core/non_terminal/impl/rule.ipp:171: instantiated from 'typename boost::spirit::parser_result<DerivedT, ScannerT>::type boost::spirit::impl::rule_base<DerivedT, EmbedT, T0, T1, T2>::parse(const ScannerT&) const [with ScannerT = boost::spirit::scanner<const char*, boost::spirit::scanner_policies<boost::spirit::skipper_iteration_policy<boost::spirit::iteration_policy>, boost::spirit::match_policy, boost::spirit::action_policy> >, DerivedT = boost::spirit::rule<boost::spirit::nil_t, boost::spirit::nil_t, boost::spirit::nil_t>, EmbedT = const boost::spirit::rule<boost::spirit::nil_t, boost::spirit::nil_t, boost::spirit::nil_t>&, T0 = boost::spirit::nil_t, T1 = boost::spirit::nil_t, T2 = boost::spirit::nil_t]' /usr/include/boost/spirit/core/scanner/impl/skipper.ipp:131: instantiated from 'static boost::spirit::parse_info<IteratorT> boost::spirit::impl::phrase_parser<boost::spirit::space_parser>::parse(const IteratorT&, const IteratorT&, const ParserT&, const boost::spirit::space_parser&) [with IteratorT = const char*, ParserT = boost::spirit::rule<boost::spirit::nil_t, boost::spirit::nil_t, boost::spirit::nil_t>]' /usr/include/boost/spirit/core/scanner/impl/skipper.ipp:153: instantiated from 'boost::spirit::parse_info<IteratorT> boost::spirit::parse(const IteratorT&, const IteratorT&, const boost::spirit::parser<DerivedT>&, const boost::spirit::parser<SkipT>&) [with IteratorT = const char*, ParserT = boost::spirit::rule<boost::spirit::nil_t, boost::spirit::nil_t, boost::spirit::nil_t>, SkipT = boost::spirit::space_parser]' /usr/include/boost/spirit/core/scanner/impl/skipper.ipp:171: instantiated from 'boost::spirit::parse_info<const CharT*> boost::spirit::parse(const CharT*, const boost::spirit::parser<DerivedT>&, const boost::spirit::parser<SkipT>&) [with CharT = char, ParserT = boost::spirit::rule<boost::spirit::nil_t, boost::spirit::nil_t, boost::spirit::nil_t>, SkipT = boost::spirit::space_parser]' serwer_www.cpp:52: instantiated from here /usr/include/boost/spirit/core/non_terminal/impl/rule.ipp:189: error: no matching function for call to 'boost::spirit::impl::abstract_parser<boost::spirit::scanner<const char*, boost::spirit::scanner_policies<boost::spirit::iteration_policy, boost::spirit::match_policy, boost::spirit::action_policy> >, boost::spirit::nil_t>::do_parse_virtual(const boost::spirit::scanner<const char*, boost::spirit::scanner_policies<boost::spirit::skipper_iteration_policy<boost::spirit::iteration_policy>, boost::spirit::match_policy, boost::spirit::action_policy> >&)' /usr/include/boost/spirit/core/non_terminal/impl/rule.ipp:213: note: candidates are: typename boost::spirit::match_result<ScannerT, AttrT>::type boost::spirit::impl::abstract_parser<ScannerT, AttrT>::do_parse_virtual(const ScannerT&) const [with ScannerT = boost::spirit::scanner<const char*, boost::spirit::scanner_policies<boost::spirit::iteration_policy, boost::spirit::match_policy, boost::spirit::action_policy> >, AttrT = boost::spirit::nil_t] can you tell me where my code is wrong and why? -- Cheers, Michał Nowotka

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[review] Formal Fast-Track review of the Boost.Functional/Factory library begins today
by John Torjo 28 Dec '07

28 Dec '07

Hi all, Today starts the formal Fast-Track review of the Boost.Functional/Factory library. *Description* Factories are callback mechanisms for constructors, so we provide two function objects, boost::value_factory and boost::factory, that encasulate object construction through direct application of the constructor or operator new, respectively. These templates make other facilities that operate on function objects (such as standard algorithms, Boost.Bind, Boost.Function, or Fusion functional adapters) applicable to constructors. *Author* Tobias Schwinger *Download* Get it from here: http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… Read documentation online here: http://torjo.com/tobias/ What to include in Review Comments ================================== Your comments may be brief or lengthy, but basically the Review Manager needs your evaluation of the library. If you identify problems along the way, please note if they are minor, serious, or showstoppers. Here are some questions you might want to answer in your review: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? And finally, every review should answer this question: * Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. Best, John Torjo - Review Manager - -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

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[boost-users] [iterator_range simple question]
by chun ping wang 28 Dec '07

28 Dec '07

Does iterator_range modify the copy of the iterator (like creates a new copy) and modifys it when you modify items in iterator range or the actual container itself. ..?

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Re: [Boost-users] [multi_index] passing 'cons t TYPE' as 'this' argument discards qualifiers
by damny＠web.de 28 Dec '07

28 Dec '07

hi joaquín, now it works. thank you. > > are there possibilities to avoid the 'std::string' for the 'name' > > key? > > I'm not getting this question. Could you please elaborate? i would like to know if it is possible to use char[] or char* as an alphanumeric key value and not std::string. improper tests didn't work. daniel > ----- Mensaje original ----- > De: damny(a)web.de > Fecha: Martes, Diciembre 25, 2007 5:17 pm > Asunto: [Boost-users] [multi_index] passing 'cons t TYPE' as 'this' > argument discards qualifiers > Para: boost-users(a)lists.boost.org > > > merry xmas everyone, > > Merry Xmas :) > > [...] > > class cClass { > > private: > > int att1; > > public: > > std::string nme; // name > > int idf; // identifier > > cClass(); > > cClass(std::string nme, int idf); > > int get_attribute(); > > }; > > > [...] > > mMapByNme::iterator itrNme = locMsg.get<0>().find("name1"); > > mMapByIdf::iterator itrIdf = locMsg.get<1>().find(456); > > printf( "att1 = %d\n", itrNme->get_attribute() ); > [...] > > main.cpp: In function `int main()': > > main.cpp:33: error: passing 'const cClass' as 'this' argument of > > 'int cClass::get_attribute()' discards qualifiers > > Process terminated with status 1 (0 minutes, 20 seconds) > > > > any hints how to solve the problem? > > The problem here is that elements of a multi_index_container > are immutable, and the iterators ony grant const access > to them. In this regard, the behavior is the same as that > of a regular std::set. To solve your particular problem you can > const-qualify the offending member function: > > int get_attribute() const; > > > how to encapsulate this special multi_index into a class, that > > fits the above description of the needed 'map'. > > You should probably consider whether Boost.Bimap could > be a better approach, but I see you're already discussing > this issue with Matías. > > > are there possibilities to avoid the 'std::string' for the 'name' > > key? > > I'm not getting this question. Could you please elaborate? > > > where are the more easier examples for C++-templates/boost > > newbies like me :o) ? > > HTH, > > Joaquín M López Muñoz > Telefónica, Investiación y Desarrollo > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > __________________________________________________________________________ Erweitern Sie FreeMail zu einem noch leistungsstärkeren E-Mail-Postfach! Mehr Infos unter http://produkte.web.de/club/?mc=021131

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Re: [Boost-users] [multi_index] passing 'const TYPE' as 'this' argument discards qualifiers
by damny＠web.de 28 Dec '07

28 Dec '07

hello matias, i hope i can test boost.bimap today. therefor the last days were a little bit to stressful. although i thank you very much for your help. see you soon, daniel _____________________________________________________________________ Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! http://smartsurfer.web.de/?mc=100071&distributionid=000000000066

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Unable to build python/example/tutorial from 1_34_1 in Windows XP with MSVC 8.0
by Andres Corrada-Emmanuel 28 Dec '07

28 Dec '07

Hello, I've been scouring the internet and boost.org documentation to do what I thought was a relatively simple task on Windows XP with MSVC 8.0: build and import into python the hello.cpp example in the 1_34_1 distribution. Warts: - The Jamroot file in the tutorial folder lacks the "import python ;" command. - No matter what I tried, bjam.exe, could not find the boost_python-vc80-mt-1_34_1.lib file. I finally gave up and copied it directly into the tutorial directory. - bjam compiled the hello.pyd but no "boost_python.dll" as the documentation for the Hello World example said it would. Has this changed? - Importing this hello.pyd fails even when I am in the same directory as the file fails. Do I need to have the boost_python.dll in the same directory? How do I create it with bjam? Is the tutorial directory broken? my bjam.exe? Any help would be appreciated. Particularly any pointers on how to debug my problems (bjam.exe --debug-configuration was not helpful in solving any of the boost_python lib import problems). -- Andres Corrada-Emmanuel Research Fellow Aerial Imaging and Remote Sensing Lab Computer Science Department University of Massachusetts at Amherst Blog: www.corrada.com/blog

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Re: [Boost-users] [multi_index] passing 'const TYPE' as 'this' argument discards qualifiers
by damny＠web.de 27 Dec '07

27 Dec '07

ahh, very nice. please excuse my thick-wittedness. but ... what if, if i would like to add an additional, unique key to my structure; a last update time, maybe. name-identifer-time >> value; valu1:=map[nme1], valu1:=map[idf1], valu1:=map[time1] in this case bimap will not solve my problem and multiindex will be the best solution. is that right? and for interest, how to solve the original problem in this case? thnx daniel _____________________________________________________________________ Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! http://smartsurfer.web.de/?mc=100071&distributionid=000000000066

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Re: [Boost-users] [review] Fast track formal review of Forward library begins today
by Tobias Schwinger 27 Dec '07

27 Dec '07

shunsuke wrote: > "A FunctionObject that can be used with boost::bind" is not good. :-) It's much better than using cryptic Concept names in tutorial-style documentation, IMO. We have a bunch of Function object Concepts defined in Fusion - and I have to say I'm waiting for the day I can remove them IOW result type computation crutches are not needed anymore... Regards, Tobias

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time date newbie problem
by Michał Nowotka 27 Dec '07

27 Dec '07

Hi, I'm a date time library newbie and currenty working on simple web server implementation in C++. I want to generate string containing actual date in following format: Wed, 26 Dec 2007 17:33:47 GMT Date time documentation is so complicated and I can't find clear answer how to do that. Can you help me? -- Cheers, Michał Nowotka

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Re: [Boost-users] [multi_index] passing 'cons t TYPE' as 'this' argument discards qualifiers
by "JOAQUIN LOPEZ MU?Z" 27 Dec '07

27 Dec '07

----- Mensaje original ----- De: damny(a)web.de Fecha: Martes, Diciembre 25, 2007 5:17 pm Asunto: [Boost-users] [multi_index] passing 'cons t TYPE' as 'this' argument discards qualifiers Para: boost-users(a)lists.boost.org > merry xmas everyone, Merry Xmas :) [...] > class cClass { > private: > int att1; > public: > std::string nme; // name > int idf; // identifier > cClass(); > cClass(std::string nme, int idf); > int get_attribute(); > }; > [...] > mMapByNme::iterator itrNme = locMsg.get<0>().find("name1"); > mMapByIdf::iterator itrIdf = locMsg.get<1>().find(456); > printf( "att1 = %d\n", itrNme->get_attribute() ); [...] > main.cpp: In function `int main()': > main.cpp:33: error: passing 'const cClass' as 'this' argument of > 'int cClass::get_attribute()' discards qualifiers > Process terminated with status 1 (0 minutes, 20 seconds) > > any hints how to solve the problem? The problem here is that elements of a multi_index_container are immutable, and the iterators ony grant const access to them. In this regard, the behavior is the same as that of a regular std::set. To solve your particular problem you can const-qualify the offending member function: int get_attribute() const; > how to encapsulate this special multi_index into a class, that > fits the above description of the needed 'map'. You should probably consider whether Boost.Bimap could be a better approach, but I see you're already discussing this issue with Matías. > are there possibilities to avoid the 'std::string' for the 'name' > key? I'm not getting this question. Could you please elaborate? > where are the more easier examples for C++-templates/boost > newbies like me :o) ? HTH, Joaquín M López Muñoz Telefónica, Investiación y Desarrollo

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[lambda] problem with if_then_else_return
by Zeljko Vrba 27 Dec '07

27 Dec '07

I have a problem with the following statement: return std::accumulate( qrun_.begin(), qrun_.end(), svt, _1 < if_then_else_return( _2 != (acct*)0, bind(&acct::get_avt, _2), (unsigned)-1)); Basically, I want to find the minimal value of get_avt() over all non-null members of qrun_ which is declared as std::vector<acct*>. I get the following compiler error with SunCC 5.9: Error, badbinaryop: The operation "unsigned<const boost::lambda::detail::return_type_deduction_failure< boost::lambda::detail::return_type_2_ifthenelsereturn<1, 1, 1, 0, unsigned, const unsigned>>" is illegal. The get_avt method is declared as: unsigned get_avt() const Removing the const qualifier doesn't help. Replacing (unsigned)-1 with _1 generates the same error, but with "const unsigned" replaced by "unsigned&". Replacing (unsigned)-1 with bare 0 compiles without any error, but does not compute what I want. Any suggestions about what am I doing wrong?

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Re: [Boost-users] [multi_index] passing 'const TYPE' as 'this' argument discards qualifiers
by damny＠web.de 26 Dec '07

26 Dec '07

hi mathias, thanks for your response. but i think there is a misapprehension. i want something like <http://www.boost.org/libs/multi_index/doc/tutorial/index.html>. "indexed by shape" should meet my "index by name" and "indexed by number" should meet my "index by identifier", so i can get the associated element value either by locMap[nme] or by locMap[idf], or something like that :o) there are 3 sets, a name key set, a identifier key set and an element value set; and there mapping. in a bimap are only 2 sets, a key set and an element set, which can swapped. thats not what i want. best regards, daniel _____________________________________________________________________ Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! http://smartsurfer.web.de/?mc=100071&distributionid=000000000066

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[Serialization] BOOST_CLASS_EXPORT_GUID_1 macro issue (SVN Trunk)
by Richard Turrin 26 Dec '07

26 Dec '07

Hi, I am in the midst of migrating some projects into VS 2008, and have downloaded and built the boost library from the SVN Trunk (retrieved on 18 December, 2007 @ 4:09 pm) which seems to satisfy support for VS 2008. However, I was having a problem compiling some code that calls the macro BOOST_SHARED_POINTER_EXPORT (the code uses Boost serialization on some shared_ptr objects). I was running into the following error: MyOuterClass.h(11) : error C2371: '`anonymous-namespace'::boost_serialization_guid_initializer___LINE___1' : redefinition; different basic types MyOuterClass.h(10) : see declaration of '`anonymous-namespace'::boost_serialization_guid_initializer___LINE___1' The issue seems to be located in the BOOST_CLASS_EXPORT_GUID_1 macro, line 160 in serialization/export.hpp. The following macro is not expanding as desired: #define BOOST_CLASS_EXPORT_GUID_1(T, K) \ ... BOOST_PP_CAT(boost_serialization_guid_initializer_, __LINE__ ## _1) \ I believe the author of this line intended that __LINE__ would be replaced with a line number where the macro is implicitly called from, and THEN concatenated with the _1 token. Unfortunately, it seems that the two tokens are concatenated first creating __LINE___1 in the process. I have a trivial workaround: #define EXPAND(x) x #define BOOST_CLASS_EXPORT_GUID_1(T, K) \ ... BOOST_PP_CAT(boost_serialization_guid_initializer_, EXPAND(__LINE__) ## _1) \ This allows me to compile without the error (under VS 2008). Please advise if there is a better or more appropriate solution. Also, I wasn't sure whether _1 was a token literal or an mpl (Boost Metaprogramming library) placeholder. I realize that 1.35 is not yet ready for release. So, I'm not expecting everything to work correctly. So far, this is the only issue I've run into. Let me know if you need more information. Thank you for your time! Best Regards, Rich Turrin

3 4

problem with boost/ublas/storage
by nksallem＠laas.fr 26 Dec '07

26 Dec '07

Hi, First Merry Christmas Second, I'm facing the same issue that the one described here : http://lists.boost.org/MailArchives/ublas/2007/08/2247.php As I didn't found a reply, I'm posting new one. I'm runnig version 10.34.01 and using ublas for a linear least square resolution problem. the error was : -------------------------------------------------------------------- ...ublas/storage.hpp at line 196: i < size ** std:exception ** bad index ------------------------------------------------------------ It seems to be a resize() problem on matrixes, any suggestions? Thanks

1 0

Re: [Boost-users] [review] Fast track formal review of Forward library begins today
by Kirit Sælensminde 26 Dec '07

26 Dec '07

Joel de Guzman wrote: > David Abrahams wrote: >> on Fri Dec 07 2007, shunsuke <pstade.mb-AT-gmail.com> wrote: >>> FWIW, starting from Abrahams' callable and functionN, I've been implementing a similar library: >>> http://tinyurl.com/vd4r5 , which regards Boost.Functional/Forward facility >>> as one of higher-order functions, `perfect`. >> Hmm. Did anyone reply to this? I think if someone points to an >> alternative library with that level of maturity during a review, it >> shouldn't be ignored. We should at least have a discussion of the >> relative merits of the two approaches before taking a vote. > > I think the Egg library is awesome. Is it in the review queue yet? > If not, it should be. My opinion here is that it can co-exist with > the Forward library just as boost.bind can coexist with boost.lambda. > It's not always a matter of which is more sophisticated. Certainly, > bind is a subset of lambda. Yet, even with the simplicity of bind, > it is sufficiently useful in many applications. I'd say the same for > Egg and Boost.Functional. > > Let's have more FP in C++! :-) I've got to agree. The egg library looks like an incredible bit of work. I'd love to see this in Boost too. I for one though do find it confusing when there is overlap between libraries because normally the documentation of the libraries don't discus each other's strengths and weaknesses and why you might want to choose one over the other. That isn't to say that there shouldn't be overlap between libraries, but it would be nice if the documentation of the libraries cross tied a bit more. K -- http://www.kirit.com/

1 0

Re: [Boost-users] [review] Fast track formal review of Forward library begins today
by David Abrahams 26 Dec '07

26 Dec '07

on Fri Dec 07 2007, shunsuke <pstade.mb-AT-gmail.com> wrote: > John Torjo wrote: >> Hi all, >> >> The formal review of the Boost.Functional/Forward library, proposed by >> Tobias Schwinger, begins today : >> >> Boost.Functional/Forward provides decorator function objects to have an >> n-ary, >> generic function object accept both RValues and mutable LValues. > > Sorry, this is not a review. Ignore this if irrelevant. > > Was boost::detail::functionN family in Boost.Accumulators considered? > That seems more advanced than Boost.Functional/Forward. > > FWIW, starting from Abrahams' callable and functionN, I've been implementing a similar library: > http://tinyurl.com/vd4r5 , which regards Boost.Functional/Forward facility > as one of higher-order functions, `perfect`. Hmm. Did anyone reply to this? I think if someone points to an alternative library with that level of maturity during a review, it shouldn't be ignored. We should at least have a discussion of the relative merits of the two approaches before taking a vote. -- Dave Abrahams Boost Consulting http://www.boost-consulting.com

1 0

[multi_index] passing 'const TYPE' as 'this' argument discards qualifiers
by damny＠web.de 26 Dec '07

26 Dec '07

merry xmas everyone, and maybe santa claus or anyone of you have a helping surprise for me :o) after became acquainted with boost and boost.python i have to learn boost.multi_index now. the goal is to build a 'map' with two individual keys (a name and an identifier) per value (object of user class); nme1-idf1-valu1, nme2-idf2-valu2, nme3-idf3-valu3, ... any value should be 'directly' accessible by name or by identifier; valu1:=map[nme1], valu1:=map[idf1]. although i don't understand the documentation perfectly and i'm not familiar with templates i recognise that boost.multi_index is the perfect way :o) and i did the following: //--- cclass.hpp ----------- #ifndef _CCLASS_HPP_ #define _CCLASS_HPP_ class cClass { private: int att1; public: std::string nme; // name int idf; // identifier cClass(); cClass(std::string nme, int idf); int get_attribute(); }; typedef boost::multi_index_container < cClass, boost::multi_index::indexed_by < boost::multi_index::hashed_unique < BOOST_MULTI_INDEX_MEMBER(cMessage,std::string,nme) >, boost::multi_index::ordered_unique < BOOST_MULTI_INDEX_MEMBER(cMessage,int, idf) > > > mMap; typedef mMap::nth_index<0>::type mMapByNme; typedef mMap::nth_index<1>::type mMapByIdf; #endif //--- cclass.cpp ----------- #include <boost/multi_index_container.hpp> #include <boost/multi_index/member.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/hashed_index.hpp> #include "cclass.hpp" cClass::cClass() { this->att1=0xFF; } cClass::cClass(std::string nme, int idf) : nme(nme), idf(idf) { this->att1=idf+1; } int cClass::get_attribute() {return this->att1; } //--- main.cpp ------------- #include <boost/multi_index_container.hpp> #include <boost/multi_index/member.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/hashed_index.hpp> #include "cclass.hpp" int main() { mapMsg locMsg; locMsg.insert( cClass("name1", 123) ); locMsg.insert( cClass("name2", 456) ); mMapByNme::iterator itrNme = locMsg.get<0>().find("name1"); mMapByIdf::iterator itrIdf = locMsg.get<1>().find(456); printf( "att1 = %d\n", itrNme->get_attribute() ); // <<<<< printf statement } //-------------------------- compiling (mingw/gcc3.4.5) this code without the printf statement works. but if i compile the whole code i get this error message: main.cpp: In function `int main()': main.cpp:33: error: passing 'const cClass' as 'this' argument of 'int cClass::get_attribute()' discards qualifiers Process terminated with status 1 (0 minutes, 20 seconds) any hints how to solve the problem? how to encapsulate this special multi_index into a class, that fits the above description of the needed 'map'. are there possibilities to avoid the 'std::string' for the 'name' key? where are the more easier examples for C++-templates/boost newbies like me :o) ? many, many thnx, daniel _______________________________________________________________________ Jetzt neu! Schützen Sie Ihren PC mit McAfee und WEB.DE. 30 Tage kostenlos testen. http://www.pc-sicherheit.web.de/startseite/?mc=022220

2 1

[serialization] get rid from rtti
by Yan Drugalya 26 Dec '07

26 Dec '07

Folks, I have class some class Circle which is derived from Shape class. I want to get rid from RTTI. In order that I did following: BOOST_CLASS_TYPE_INFO( Circle, extended_type_info_no_rtti<Circle> ) BOOST_CLASS_EXPORT(Circle) const char * Circle::get_key() const { const boost::serialization::extended_type_info *eti = boost::serialization::type_info_implementation<Circle> ::type::get_instance(); return eti->get_key(); } But even after that, if I try to compile project a lot of waring appear: warning C4541: 'dynamic_cast' used on polymorphic type 'boost::archive::detail::basic_oarchive' with /GR-; unpredictable behavior may result it also fails with exception during runtime. What also need to be done to completely get rid form RTTI

2 1

MPL: flatten implementation not working
by Andreas Klöckner 25 Dec '07

25 Dec '07

Hi all, I came up with the following implementation of a "flatten" operation that turns a sequence of sequences into a flat list: 8< ------------------------------------------------------------------- #include <iostream> #include <boost/mpl/vector.hpp> #include <boost/mpl/vector_c.hpp> #include <boost/mpl/clear.hpp> #include <boost/mpl/fold.hpp> #include <boost/mpl/copy.hpp> #include <boost/mpl/placeholders.hpp> #include <boost/mpl/back_inserter.hpp> #include <boost/mpl/size.hpp> template<class Sequence> struct flatten { typedef typename boost::mpl::fold< Sequence, typename boost::mpl::clear<Sequence>::type, typename boost::mpl::copy< boost::mpl::_2, boost::mpl::back_inserter<boost::mpl::_1> >::type >::type type; }; typedef flatten< boost::mpl::vector< boost::mpl::vector_c<int, 0, 1, 2, 3>, boost::mpl::vector_c<int, 4, 5, 6> > >::type flatvec; int main() { std::cout << boost::mpl::size<flatvec>::value << std::endl; } 8< ------------------------------------------------------------------- It compiles (using gcc 4.2.1), but prints 0 instead of the expected 7. What am I doing wrong? Thanks for your help Andreas

2 1

[boost-users] [iterator_range construct new iterator_range of arbitary size_type]
by chun ping wang 25 Dec '07

25 Dec '07

Hi I have two questions. How would I go about using iterator_range to construct a new boost iterator_range of specific size_type ? 1.) Like std::vector<int> v(40); // constructs 40 int objects but instead your giving only std::vector<int>::iterator beg(v.begin()), end(v.end()); // the range 2.) How would with combination of iterator_range modify an existing sequence. Like BOOST_FOREACH(int& x, v) but using boost iterator_range concept instead. Thanks.

3 4

[serialization] understanding of track_always serialization trait
by Yan Drugalya 24 Dec '07

24 Dec '07

Folks , I feel a lack of understanding what actually track_always trait does. I expect that boost does not allow me to save/load twice object with the same address? But it reports BOOST_STATIC_ASSERT even in following case: Question 1 Class A { // serialization support }; BOOST_CLASS_TRACKING (A, track_always) BOOST_CLASS_EXPORT( A) … A* a = new A; oa << a ; assert in oserializer.hpp // if your program traps here, it indicates taht your doing one of the following: // a) serializing an object of a type marked "track_never" through a pointer. // b) saving an non-const object of a type not markd "track_never) // Either of these conditions may be an indicator of an error usage of the // serialization library and should be double checked. See documentation on // object tracking. Qurstion 2 Above code with using of xml_oarchive compliles and works: oa << BOOST_SERIALIZATION_NVP(a); oa << BOOST_SERIALIZATION_NVP(a); I expect that it should raise above BOOST_STATIC_ASSERT because I trying to store the same object twice? Question 3 Also I can't understand how track_always serialization trait works in case of Diamond inheritance Quataion from documentation "In a diamond hesitance structure with a virtual base class, object tracking will prevent redundant save/load invocations" How boost knows that this is virtual base class and prevents redundant save/load invocations? Please help me to find the way to understanding of object tracking trait :) Thank you

2 1

Help needed on time date
by tonyaim83 24 Dec '07

24 Dec '07

Hi I'm using Date time library for the first time so no idea how best make use of it. My primary target is to check if the first timestamp and second timestamp entered by the user are in a span of one hour. Format of input string is as follows YYYYDDMM-HH:MM:SS(20071015-17:47:10) Now if the second string is also in the an hour span it should return true otherwise false. I m thinking of doing this like std::string to_iso_string(date d1) ptime p1(d1, time_duration("17:21:23")); std::string to_iso_string(date d2) ptime p2(d2, time_duration("17:22:23")); ptime p3=p2-p1; if (p3>1) { return false; } I could also find a function which has a separator T std::string to_iso_extended_string(ptime); How can i make use of this function as in my case the separtor of date- time is "-" Or a better way to perform the same task. -- View this message in context: http://www.nabble.com/Help-needed-on-time-date-tp14486644p14486644.html Sent from the Boost - Users mailing list archive at Nabble.com.

3 2

[interprocess][intrusive][mpi] Latest SVN head documentation
by Edward Diener 24 Dec '07

24 Dec '07

In the latest SVN head, the documentation for interprocess and intrusive offo of the main Boost documentation page eventually points to an HTTP metacomm address where no documentation exists rather than to the documentation in the corresponding boost/libs/interprocess/doc/html and boost/libs/intrusive/doc/html where documentation does exist after bjam is used to build it. For MPI in the latest SVN head, the documentation off of the main Boost documentation page points to boost/doc/html/mpi.html but no file exists here even after building the MPI docs with bjam. Instead it should eventually point to boost/libs/mpi/doc/html where docs do exist for MPI after one builds them.

1 0

BGL: Finding all simple cycles in an undirected graph
by Torsten Sadowski 23 Dec '07

23 Dec '07

Hello, I am looking for a way to find all simple cycles in an undirected graph. I need it to reconstruct a 3D mesh from a graph containing the mesh vertices and edges. Any hints? Cheers, Torsten

2 3

Cygwin compilation problem
by Kent Holsinger 23 Dec '07

23 Dec '07

I've used various earlier versions of Boost with Cygwin in the past, and I am finally getting around to trying version 1.34.1. Unfortunately, I can't get it to build. Here's the string of error messages I get when I try: ***** 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). /c/development/boost_1_34_1/tools/build/v2/tools/stage.jam:424: in object(installed-shared-lib-generator)(a)4.run *** argument error * rule virtual-target.register ( target ) * called with: ( object(file-target)@1391 object(file-target)@1392 ) * extra argument object(file-target)@1392 /c/development/boost_1_34_1/tools/build/v2/build/virtual-target.jam:880:see definition of rule 'register' being called /c/development/boost_1_34_1/tools/build/v2/build/generators.jam:840: in try-one-generator-really /c/development/boost_1_34_1/tools/build/v2/build/generators.jam:902: in try-one-generator /c/development/boost_1_34_1/tools/build/v2/build/generators.jam:1110: in construct-really /c/development/boost_1_34_1/tools/build/v2/build/generators.jam:1186: in generators.construct /c/development/boost_1_34_1/tools/build/v2/tools/stage.jam:160: in construct /c/development/boost_1_34_1/tools/build/v2/build/targets.jam:1242: in object(install-target-class)(a)65.generate /c/development/boost_1_34_1/tools/build/v2/build/targets.jam:765: in generate-really /c/development/boost_1_34_1/tools/build/v2/build/targets.jam:738: in object(main-target)(a)249.generate /c/development/boost_1_34_1/tools/build/v2/build/targets.jam:895: in targets.generate-from-reference /c/development/boost_1_34_1/tools/build/v2/build/targets.jam:1169: in generate-dependencies /c/development/boost_1_34_1/tools/build/v2/build/targets.jam:1214: in object(alias-target-class)(a)71.generate /c/development/boost_1_34_1/tools/build/v2/build/targets.jam:765: in generate-really /c/development/boost_1_34_1/tools/build/v2/build/targets.jam:738: in object(main-target)(a)253.generate /c/development/boost_1_34_1/tools/build/v2/build-system.jam:402: in load /c/development/boost_1_34_1/tools/build/v2/kernel/modules.jam:261: in import /c/development/boost_1_34_1/tools/build/v2/kernel/bootstrap.jam:132: in boost-build /c/development/boost_1_34_1/boost-build.jam:9: in module scope ***** If it makes any difference bjam --version reports: Boost.Build V2 (Milestone 11) Boost.Jam 03.1.16 and gcc --version reports gcc (GCC) 3.4.4 (cygming special, gdc 0.12, using dmd 0.125) Do I need to figure out how to compile gcc 4.x under Cygwin, or is there a simpler way to get things to work? Kent -- Kent E. Holsinger kent(a)darwin.eeb.uconn.edu http://darwin.eeb.uconn.edu -- Department of Ecology & Evolutionary Biology -- University of Connecticut, U-3043 -- Storrs, CT 06269-3043

2 2

VS2005 threads with clr option not working
by Jason McGuidwin 23 Dec '07

23 Dec '07

hello, I am trying to compile a simple proragm with the thread headers included and the clr option in VS2005 When i include the thread headers and set the to compile with the /clr option the app will not execute and give the error below: "The application failed to initialize properly (0xc000007b). Click on OK to terminate the application." this sample program works fine without the clr option, however I am writing a managed c++ app that needs this option on. also I have used the lib installer from http://www.boost-consulting.com/products/free the 1.34.1 installer for vs8.0, I have selected all options and still does not work. I have tried defining BOOST_THREAD_USE_DLL and BOOST_THREAD_USE_LIB, still fails. BOOST_THREAD_USE_LIB error message is the same as if I did not have this define. BOOST_THREAD_USE_DLL error message: "This application has failed to start because boost_threads-vc80-mt-gd-1_34_1.dll was not found. Re-Installing the application may fix this problem." my project prefs have the following settings: c/c++ - additional include directories= "C:\Program Files\Boost\boost_1_34_1\" linker - additional include directories= "C:\Program Files\Boost\boost_1_34_1\lib" [code] #include "stdafx.h" #include <iostream> #include <boost/timer.hpp> //#define BOOST_THREAD_USE_DLL //#define BOOST_THREAD_USE_LIB #include <boost/thread/thread.hpp> #include <boost/thread/xtime.hpp> int main(int argc, char* argv[]) { boost::xtime expiration; boost::timer the_timer; //starts the timer std::cout<<"Welcome to the sample program!"<<std::endl; for(int i = 0;i <1000000; i++) { if(i%100000 == 0) { std::cout<<"."; boost::xtime_get(&expiration, boost::TIME_UTC); expiration.nsec +=int(5 * 1e08);// half second; boost::thread::sleep(expiration); } } std::cout<<std::endl<<"This program has been running for: "<< the_timer.elapsed() <<" second(s)." << std::endl; std::cout<< std::endl<<"Press any key then enter to exit. "<< std::endl; char buff[100]; std::cin>>buff; } [/code] Jason McGuidwin Gnostech Inc. San Diego, Ca

3 2

[review] Formal Fast-Track review of the Boost.Functional/Factory library - extended until sunday
by John Torjo 22 Dec '07

22 Dec '07

Hi all, I've extended the review until Sunday (inclusive). I'm hoping for more reviews. So far, we've had only two. If you are interested in the library (you should be :)), please take some time to review it. This is the info you need to do a review on: *Description* Factories are callback mechanisms for constructors, so we provide two function objects, boost::value_factory and boost::factory, that encasulate object construction through direct application of the constructor or operator new, respectively. These templates make other facilities that operate on function objects (such as standard algorithms, Boost.Bind, Boost.Function, or Fusion functional adapters) applicable to constructors. *Author* Tobias Schwinger *Download* Get it from here: http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… Read documentation online here: http://torjo.com/tobias/ What to include in Review Comments ================================== Your comments may be brief or lengthy, but basically the Review Manager needs your evaluation of the library. If you identify problems along the way, please note if they are minor, serious, or showstoppers. Here are some questions you might want to answer in your review: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? And finally, every review should answer this question: * Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. Best, John Torjo - Review Manager - -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

4 6

Re: [Boost-users] [review] Formal Fast-Track review of the Boost.Functional/Factory library - extended until sunday
by Tobias Schwinger 22 Dec '07

22 Dec '07

shunsuke wrote: > John Torjo wrote: >> Hi all, >> >> I've extended the review until Sunday (inclusive). I'm hoping for more reviews. So far, we've had only two. >> If you are interested in the library (you should be :)), please take some time to review it. This >> is the info you need to do a review on: >> >> *Description* >> >> Factories are callback mechanisms for constructors, so we provide two >> function objects, boost::value_factory and boost::factory, that >> encasulate object construction through direct application of the >> constructor or operator new, respectively. These templates make other >> facilities that operate on function objects (such as standard >> algorithms, Boost.Bind, Boost.Function, or Fusion functional adapters) >> applicable to constructors. > > Is there any difference to lambda::constructor/new_ptr? Yes, those components are designed to only work with the Lambda library. Functional/Factory OTOH provides standard compliant (they work with result_of and the libraries built upon it) function objects. Regards, Tobias

2 3

vector slice for other containers
by abir basak 22 Dec '07

22 Dec '07

Hi, can I use vector_slice / vector_range from uBLAS for std::vector or std::deque ? Or any other library can do it? I can't use iterator based libs (like boost::range or boost::range + step_iterator) as I want to hold view even after a few push_back & pop_front , as long as no element gets remove from within my view window. If elements gets removed from view window,any behavior is fine for me .. but if the case is not so , I want the range/slice view to hold the proper elements irrespective of iterator invalidation due to push_back/pop_front. Thanks abir

1 0

[review] Formal Fast-Track review of the Boost.Functional/Factory library - 2 days left
by John Torjo 22 Dec '07

22 Dec '07

Hi all, There are only 2 days left from the formal Fast-Track review of the Boost.Functional/Factory library. We've had just one review, and we need more. If you are interested in the library (you should be :)), please take some time to review it. This is the info you need to do a review on: *Description* Factories are callback mechanisms for constructors, so we provide two function objects, boost::value_factory and boost::factory, that encasulate object construction through direct application of the constructor or operator new, respectively. These templates make other facilities that operate on function objects (such as standard algorithms, Boost.Bind, Boost.Function, or Fusion functional adapters) applicable to constructors. *Author* Tobias Schwinger *Download* Get it from here: http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… Read documentation online here: http://torjo.com/tobias/ What to include in Review Comments ================================== Your comments may be brief or lengthy, but basically the Review Manager needs your evaluation of the library. If you identify problems along the way, please note if they are minor, serious, or showstoppers. Here are some questions you might want to answer in your review: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? And finally, every review should answer this question: * Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. Best, John Torjo - Review Manager - -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

4 6

[review][unordered] Review summary
by Ion Gaztañaga 21 Dec '07

21 Dec '07

Hi to all, This post tries to summarize the review of the new Boost.Unordered library. In general, there were no serious implementation change requests and most reviewers had only documentation issues. Here we go: * * * begin of summary * * * Thosten Ottosen's review: ---------------------- (http://lists.boost.org/Archives/boost/2007/12/131372.php) Thorsten questioned about the convenience of supporting throwing hash or predicates. This started a thread about the exception safety guarantees of STL containers and Daniel explained the thread-safety guarantees of Unordered. Basically, Daniel's implementation uses an smart double-buffering technique to obtain strong safety guarantees (stricter than the requirements of the standard) in some operations. There's an slight size overhead (the container must allocate space for two equality functors and hashers) but according to Daniel, speed should not suffer. Chung Ping Wang's review: ---------------------- (http://lists.boost.org/Archives/boost/2007/12/131372.php) The only complain was the packaging of the library (there was an "unordered" directory at the top). Since the library has been accepted it will be packaged as the rest of Boost libraries so the problem disappears. Mathias Gaunard's comment: ---------------------- (http://lists.boost.org/Archives/boost/2007/12/131426.php) Mathias suggested adding move semantics and in-place construction. Daniel said that these features were likely to be added in the future. He pointed that we have no standard move emulation library in Boost so we'll need to push that first. Regarding in-place construction, there is a problem with allocators, since containers are now required to call allocator::construct() to construct values. Hervé Brönnimann's review: ---------------------- (http://lists.boost.org/Archives/boost/2007/12/131435.php) Hervé praised the library and suggested adding operator==(). Daniel replied that he was trying to limit himself to obvious design decisions for extensions so he didn't want to go into this area. He also cited some problems with non-unique key unordered containers. Hervé suggested extending the prime number list and Daniel agreed. Daniel also agreed to correct some documentation issues. "Swap" semantics wrt allocators was also discussed. "Swap" and its effect on containers is an active issue in the committee, so Daniel is free to implement what he thinks best until we have a firm resolution. John Torjo's review: ---------------------- (http://lists.boost.org/Archives/boost/2007/12/131557.php) A concise and positive review with no comments. Jamie Allsop's review: ---------------------- (http://lists.boost.org/Archives/boost/2007/12/131762.php) Documentation suggestions that Daniel found interesting and a request to include a comparison with other implementations. Steven Watanabe's comments ---------------------- (http://lists.boost.org/Archives/boost/2007/12/131817.php) Several implementation comments regarding (ADL, BOOST_DEDUCED_TYPENAME, warnings...). See the post for details. Cromwell Enage's review ---------------------- (http://lists.boost.org/boost-users/2007/12/32706.php) Suggested the addition of local_cbegin() and similar, and some documentation suggestions Daniel agreed to solve. Paul A Bristow's review ---------------------- (http://lists.boost.org/Archives/boost/2007/12/131545.php) A brief and positive review with no comments. * * * end of summary * * * Regards, Ion

1 0

BOOST_PP_COUNTER compiler errors (MSVC8)
by Robert Dailey 21 Dec '07

21 Dec '07

Hi, I'm currently compiling my code in Visual Studio 2005. Below is the code that utilizes BOOST_PP_COUNTER. Note that the goal here is to increment the counter 1 time each time the CHECK_MATCH_AND_RETURN macro is used. This allows me to make sure that I've got one macro call per enumeration member. The problem I'm having is that I'm getting page after page of compiler error and as far as I can tell I'm using the counter system as it was shown in the code examples. Below I've also listed some of the compiler errors I'm getting: Compiler Errors: error C2162: expected macro formal parameter error C2065: 'include' : undeclared identifier error C2882: 'boost' : illegal use of namespace identifier in expression Code: #include <boost/static_assert.hpp> #include <boost/preprocessor/slot/counter.hpp> /// Various camera actions that may be performed. /// These actions are usually a result of input events. enum CameraAction { MOVE_FORWARD = 0 , MOVE_BACKWARD , MOVE_LEFT , MOVE_RIGHT , MOVE_UP , MOVE_DOWN , ROTATE_RIGHT , ROTATE_LEFT , ROTATE_UP , ROTATE_DOWN , ROLL_LEFT , ROLL_RIGHT , INCREASE_ACCEL , DECREASE_ACCEL , ENABLE_LOOK , TOGGLE_LOOK , ENABLE_AUTO_MOVE , TOGGLE_AUTO_MOVE /// @cond , NUM_CAMERAACTIONS , CAMERAACTION_NONE /// @endcond }; //========================================================================================= CameraAction StringToCameraAction( const std::string& str ) { // I'm using a macro here because I need the stringizing preprocessor operator (#) // to make the conditionals more manageable. By using this macro, I never have to explicitly // update the string comparison itself if the enumeration names ever change. #define CHECK_MATCH_AND_RETURN( action ) if( str == #action ) { return action; } #include BOOST_PP_UPDATE_COUNTER() CHECK_MATCH_AND_RETURN( ROTATE_LEFT ) CHECK_MATCH_AND_RETURN( ROTATE_RIGHT ) CHECK_MATCH_AND_RETURN( ROTATE_UP ) CHECK_MATCH_AND_RETURN( ROTATE_DOWN ) CHECK_MATCH_AND_RETURN( MOVE_UP ) CHECK_MATCH_AND_RETURN( MOVE_DOWN ) CHECK_MATCH_AND_RETURN( MOVE_LEFT ) CHECK_MATCH_AND_RETURN( MOVE_RIGHT ) CHECK_MATCH_AND_RETURN( MOVE_FORWARD ) CHECK_MATCH_AND_RETURN( MOVE_BACKWARD ) CHECK_MATCH_AND_RETURN( ROLL_RIGHT ) CHECK_MATCH_AND_RETURN( ROLL_LEFT ) CHECK_MATCH_AND_RETURN( INCREASE_ACCEL ) CHECK_MATCH_AND_RETURN( DECREASE_ACCEL ) CHECK_MATCH_AND_RETURN( ENABLE_LOOK ) CHECK_MATCH_AND_RETURN( TOGGLE_LOOK ) CHECK_MATCH_AND_RETURN( ENABLE_AUTO_MOVE ) CHECK_MATCH_AND_RETURN( TOGGLE_AUTO_MOVE ) // This helps me remember to add/remove items above. BOOST_STATIC_ASSERT( (BOOST_PP_COUNTER)+1 != NUM_CAMERAACTIONS ); return CAMERAACTION_NONE; }

2 6

multi_index_container: modification of a non-key member of a value_type
by Venikov, Andy 21 Dec '07

21 Dec '07

Let say we have struct A {...}; struct B {...}; struct C {...}; And we define a container of objects that hold these three structures: struct Whole { A a; B b; C c; }; multi_index_container<Whole, indexed_by< ordered_unique< member<Whole, A, &Whole::a> > >, indexed_by< ordered_unique< member<Whole, A, &Whole::b> > > > container; As you can see only a and b are the keys, c is just a member. Let's also say that we've got an iterator "it" pointing to an element in the container (through what index the iterator has been retrieved is immaterial at this point). And we want to modify "c" member of that element. Is this safe: *const_cast<C **>(&it->c) = <new value of c> ??? I know that one can use "modify" member function, but it seems an overkill to have to create a separate functor just to update a non-key element. Plus, member does additional checks on collision, and the performance may suffer as a result. Thanks, Andy.

2 1

State machine throws std exception in an action
by Andreas Huber 21 Dec '07

21 Dec '07

Forwarded private email: --- Ankorus wrote: > Subject: State machine throws std exception in an action > Date: Mon, 10 Dec 2007 15:08:01 -0800 > > Andreas, > > The state machine I am using for boost statechart playground is as > simple as it gets. > Stopped -> Started > where Started state has 2 sub states: > Passive (default) -> Active. > I started with simple_state, found that it does not have sm context > in constructor, moved to state, added some actions. > Everything was looking good so far. > Now the action called transitioning from Passive to Active throws > std exception. > I am expecting Started state to transit to Exception but it is not > happenning... > Any comments appreciated... > > Thanks, > Ankorus > > // StateDefines.h > #pragma once > #include <boost/statechart/event.hpp> > #include <boost/statechart/state_machine.hpp> > namespace sc = boost::statechart; > // Events > struct EvStart : sc::event<EvStart> {}; > struct EvStop : sc::event<EvStop> {}; > struct EvActivate : sc::event<EvActivate> {}; > struct EvDeactivate : sc::event<EvDeactivate> {}; > // States > struct Started; > struct Stopped; > struct Active; > struct Passive; > struct Exception; > > // States.h > #pragma once > #include <boost/statechart/state.hpp> > #include <boost/statechart/simple_state.hpp> > #include <boost/statechart/transition.hpp> > #include <boost/statechart/exception_translator.hpp> > #include <boost/mpl/list.hpp> > #include "SomeClass.h" > namespace mpl = boost::mpl; > struct Started : sc::simple_state<Started, SomeClass, Passive> > { > typedef mpl::list > < > sc::transition<EvStop, Stopped, SomeClass, &SomeClass::Shutdown>, > sc::transition<sc::exception_thrown, Exception> > > reactions; > Started(); > ~Started(); > }; > struct Stopped : sc::state<Stopped, SomeClass> > { > typedef sc::transition<EvStart, Started, SomeClass, > &SomeClass::Startup> reactions; > Stopped(my_context ctx); > ~Stopped(); > }; > struct Active : sc::simple_state<Active, Started> > { > typedef sc::transition<EvDeactivate, Passive, SomeClass, > &SomeClass::Deactivate> reactions; > Active(); > ~Active(); > }; > struct Passive : sc::simple_state<Passive, Started> > { > typedef sc::transition<EvActivate, Active, SomeClass, > &SomeClass::Activate> reactions; > Passive(); > ~Passive(); > }; > struct Exception : sc::simple_state<Exception, Started> > { > //typedef sc::transition<EvStart, Started, SomeClass, > &SomeClass::Startup> reactions; > Exception(); > ~Exception(); > }; > > // States.cpp > #include "StdAfx.h" > #include "States.h" > Stopped::Stopped(my_context ctx) > : sc::state<Stopped, SomeClass>(ctx) > { > std::cout << __FUNCTION__ << std::endl; > context<SomeClass>().SomeFun(); > }; > Stopped::~Stopped() > { > std::cout << __FUNCTION__ << std::endl; > }; > Started::Started() > { > std::cout << __FUNCTION__ << std::endl; > }; > Started::~Started() > { > std::cout << __FUNCTION__ << std::endl; > }; > Active::Active() > { > std::cout << __FUNCTION__ << std::endl; > }; > Active::~Active() > { > std::cout << __FUNCTION__ << std::endl; > }; > Passive::Passive() > { > std::cout << __FUNCTION__ << std::endl; > }; > Passive::~Passive() > { > std::cout << __FUNCTION__ << std::endl; > }; > Exception::Exception() > { > std::cout << __FUNCTION__ << std::endl; > }; > Exception::~Exception() > { > std::cout << __FUNCTION__ << std::endl; > }; > > > // SomeClass.h > #pragma once > #include "StatesDefines.h" > class SomeClass : public sc::state_machine<SomeClass, Stopped> > { > public: > SomeClass(); > ~SomeClass(); > void SomeFun() > { > std::cout << __FUNCTION__ << std::endl; > } > public: > void Activate(const EvActivate& e) > { > std::cout << "Action: "__FUNCTION__ << std::endl; > throw std::exception("Activation exception"); > } > void Deactivate(const EvDeactivate& e) { std::cout << __FUNCTION__ > << std::endl; } > void Startup(const EvStart& e) { std::cout << __FUNCTION__ << > std::endl; } > void Shutdown(const EvStop& e) { std::cout << __FUNCTION__ << > std::endl; } > }; > > // SomeClass.cpp > #include "StdAfx.h" > #include "States.h" > SomeClass::SomeClass() > { > initiate(); > } > SomeClass::~SomeClass() > { > } > > // main.cpp > #include "stdafx.h" > #include "SomeClass.h" > int main(int argc, char* argv[]) > { > //try > //{ > SomeClass sc; > sc.process_event(EvStart()); > sc.process_event(EvActivate()); > sc.process_event(EvStop()); > //} > //catch(std::exception& e) > //{ > // std::cout << e.what() << std::endl; > //} > return 0; > }

1 1

How to create a compilation warning
by Remi Ricard 21 Dec '07

21 Dec '07

Hi, I want to warn user about a possible miss use of a function. Now I'm only able to stop the compilation with the following code template <typename ValueType> class simVec3 { ......... /// Unary multiply by scalar. /// @param rsh The scalar to multiply the vector with template<class T> simVec3<ValueType>& operator *= (const T& rhs) { // The function should not be use like this // simVec<int> vec(1, 1, 1); // a *= 0.3; // since what a will contain is [0, 0, 0] BOOST_MPL_ASSERT_NOT(( boost::mpl::and_< \ boost::is_floating_point<T>, \ boost::is_integral<ValueType> > )); ValueType s=static_cast<ValueType>(rhs); vec[0]*=s; vec[1]*=s; vec[2]*=s; return *this; } What I would want is something like #if A_meta_function_returning_1_if_int_double #pragma message("simVec::Possible type truncation") #endif instead of the BOOST_MPL_ASSERT_NOT I also tried something like: template <bool x> struct AA; template <> struct AA<true> { enum {value = 1 }; }; template <> struct AA<false> { enum {value = 0}; }; template <typename U, typename V> double myfct(U u, V v) { #if ( AA< boost::mpl::and_< boost::is_integral<U>, \ boost::is_floating_point<V> > > ::value ) #pragma message("****** Hellop *********") #endif return u + v; } But the compilation is complaining about an unmatched parenthesis Remi

2 2

[Boost.Spirit] Cannot negate a parser with action?
by Smith, Lloyd 20 Dec '07

20 Dec '07

The following negation gives the error messages below (VS2005). Negation is OK if no action is given. Is there any way to enable an action on a negated character parser? +(~ch_p(L';')[push_back_a(variableName)]) error C2678: binary '~' : no operator found which takes a left-hand operand of type 'boost::spirit::action<ParserT,ActionT>' (or there is no acceptable conversion) Lloyd Smith Senior Architect, Development CA, Inc. tel: +1 858 625-6869 tel: +1 858 538-1189 (home) mailto:lloyd.smith@ca.com <mailto:lloyd.smith@ca.com>

1 0

Boost in Eclipse CDT..
by Filip Balas 20 Dec '07

20 Dec '07

Hi All, I saw an earlier post that talked about this similar problem, but the only reply did not solve my problem. I have eclipse 3.2.2, cdt 3.1.1.1 I have to use these versions because I am also using the cell SDK 2.1. I am getting the error: expected primary-expression before ')' token expected primary-expression before '>' token The line of code looks like: #include <boost/filesystem/path.hpp> #include <boost/filesystem/operations.hpp> namespace fs = boost::filesystem; fs::path configPath(fs::initial_path<fs::path>()); I have 'boost_filesystem' in my libraries (-l) section in my Linker tab. I have '/usr/include/boost' in my include paths section (-l) in my compiler & debug options. (this is the right path) I am wondering if this may be a problem with the version of eclipse/cdt that I'm using, or if someone else has had this problem and knows of a solution? Thanks, Phil

3 9

double arithmetic precession and equality
by Andrej van der Zee 20 Dec '07

20 Dec '07

Hi, I was wondering if boost provides any support for testing equality of two doubles. In principle in C/C++ you cannot rely on equality because it uses bitwise comparison of doubles and in arithmetic expressions results may have lost some precession. An example will help: #include <iostream> int main(void) { double start = 3.123; double end = 4.124; double diff = end - start; // == 1.001 ??? if (diff != 1.001) { std::cout << diff << " and " << 1.001 << " are not equal" << std::endl; } } On my machine, this example outputs: 1.001 and 1.001 are not equal I am using a lot of arithmetic expressions on floating-point values and also need to test for equality. Also, at compile-time I do not know the precession so comparing within the range of an epsilon seems impossible. So does boost have anything for this I don't know of? Or any other libraries? Thanks, Andrej ___________________________________________________________ Yahoo! Answers - Got a question? Someone out there knows the answer. Try it now. http://uk.answers.yahoo.com/

3 2

[boost] [serialization] typeid information is not included in archives
by Andrei Popa 20 Dec '07

20 Dec '07

Hallo all,I just discovered the serialization library found it extremely nice and useful. I appreciate all work of the author.I have not yet build any program with the library, I just read the documentation.There is one think that do not fit to my use: "typeid information is not included in archives".The reason is "archive portability" and the solution "same sequence by save/load".But what if I do not know the sequence? What can I do then?Think about a CAD program. I do not know what the user will draw, a line, circle, rectangle and so on.And I have to save them in a file, at the load I need to know what type of object do I load.For me the "archive portability" is not so important. Is there a way to configure/change the library to save the name of the class specified by std::type_of::name() in the archive?Best regards,Andrei _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

3 4

Problem in accessing bundled properties with Dynamic Properties
by tonyaim83 20 Dec '07

20 Dec '07

Hi.. My Sample Previous code look like #include "src-graphml.hpp" using namespace std; using namespace boost; int main(int argc, char** argv) { typedef adjacency_list<vecS,vecS,directedS, property<vertex_name_t,string>, property<edge_weight_t,double> > graph_t; graph_t g; dynamic_properties dp; dp.property("color",get(vertex_name_t(),g)); dp.property("weight",get(edge_weight_t(),g)); return 0; } Now i have added one more property to the vertex and i m using bundled property for declaration.So now my code look like.. #include "src-graphml.hpp" using namespace std; using namespace boost; struct node { string name; string path; }; int main(int argc, char** argv) { typedef adjacency_list<vecS,vecS,directedS, node,property<edge_weight_t,double> > graph_t; graph_t g; dynamic_properties dp; dp.property("name",g().name); dp.property("file",g[*node].path); dp.property("weight",get(edge_weight, g)); return 0; } I have quoted with bold tag the one in which i m getting compilation error just let me know how to use it correctly.. Thanks in advance.. -- View this message in context: http://www.nabble.com/Problem-in-accessing-bundled-properties-with-Dynamic-… Sent from the Boost - Users mailing list archive at Nabble.com.

2 1

[review][unordered] Unordered accepted
by Ion Gaztañaga 19 Dec '07

19 Dec '07

Hi to all, The Unordered library submitted by Daniel James has been *accepted* into Boost. Thanks to all reviewers and all who contributed to the library before the review. We've received 8 reviews (Thosten Ottosen, Chun Ping Wang, Hervé Brönnimann, John Torjo, Cromwell Enage, Jamie Allsop, Graham Mark and Paul Bristow), and all were positive (since Chun's only complain was packaging and his ratings were all above 7 out of 10). Darren Cook privately sent me a positive mini-review (attached below). If I've missed any review, please let me know. I plan to write a post this weekend with a summary of requests/suggestions and Daniel's replies. Congrats Daniel! Regards, Ion /////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////// Hi Ion, Not critical but the images seem to be missing. E.g. on http://igaztanaga.drivehq.com/unordered/unordered/buckets.html If I find time I will try out the library and write a review in the week, but here is a mini-review (feel free to forward to the list - I'm not subscribed at the moment): Documentation: * Fine * The concrete examples of how to use a custom type, and a custom hash function, and do everything in portable TR1, are wonderful - I've searched before and never been able to find something as clear as this seems to be. * In Table 1.4: "No equivalent. No idea why." is not very Boost-like :-) . Isn't the reason simply that there is no ordering in hash containers, so therefore no ordering function? > > * What is your evaluation of the potential usefulness of the library? > > * Do you think the library should be accepted as a Boost library? Yes. It is essential it gets into Boost as rapidly as possible; in fact I think it should be released as a patch to the current release. Having all of TR1 except for the hashed containers is a nasty red pimple on the otherwise very handsome nose of Boost. In particular, Visual C++ *still* does not ship with TR1 ("no plans until 2009" was the rumour I found), so anyone wanting to ship portable code is relying on Boost. And, at least for me, unordered_map is the single most useful library in TR1. Darren

3 2

[boost-users] [boost::lambda and ptrdiff_t].
by chun ping wang 19 Dec '07

19 Dec '07

Hi, does anyone know whats wrong with this code. It doesn't compile on gcc-mingw 4.1.2. it works on msvc visual studio 2005. code: template <class InputIterator> typename InputIterator::difference_type kmean::getClusterIndex(InputIterator first, InputIterator last) { typedef typename InputIterator::value_type T; BOOST_STATIC_ASSERT(boost::is_floating_point<T>::value); #ifdef __DEBUG__ boost::prof::profiler p; #endif T min(std::numeric_limits<T>::max()); typedef typename InputIterator::difference_type diff_type; diff_type index(0); diff_type currentIndex(0); std::for_each(first, last, ( boost::lambda::if_then(boost::lambda::_1 < boost::lambda::var(min), ( boost::lambda::var(min) = boost::lambda::_1, boost::lambda::var(index) = boost::lambda::var(currentIndex) )), ++boost::lambda::var(currentIndex) ) ); #ifdef __DEBUG__ std::cerr << "finish getClusterIndex\n"; #endif return index; } error message: C:/Boost/include/boost/lambda/detail/lambda_functor_base.hpp: In member function 'boost::lambda::identity<ptrdiff_t&>& boost::lambda::identity<ptrdiff_t&>::operator=(const boost::lambda::identity<ptrdiff_t&>&)': C:/Boost/include/boost/lambda/detail/lambda_functor_base.hpp:23: instantiated from 'typename InputIterator::difference_type kmean::getClusterIndex(InputIterator, InputIterator) [with InputIterator = __gnu_cxx::__normal_iterator<double*, std::vector<double, std::allocator<double> > >]' ./cs522/c++/kmeanMain.cpp:70: instantiated from here C:/Boost/include/boost/lambda/detail/lambda_functor_base.hpp:23: error: non-static reference member 'ptrdiff_t& boost::lambda::identity<ptrdiff_t&>::elem', can't use default assignment operator C:/Boost/include/boost/lambda/detail/lambda_functors.hpp: In member function 'boost::lambda::lambda_functor<boost::lambda::identity<ptrdiff_t&> >& boost::lambda::lambda_functor<boost::lambda::identity<ptrdiff_t&> >::operator=(const boost::lambda::lambda_functor<boost::lambda::identity<ptrdiff_t&> >&)': C:/Boost/include/boost/lambda/detail/lambda_functors.hpp:113: note: synthesized method 'boost::lambda::identity<ptrdiff_t&>& boost::lambda::identity<ptrdiff_t&>::operator=(const boost::lambda::identity<ptrdiff_t&>&)' first required here ./cs522/c++/def/kmeandef.hpp: In function 'typename InputIterator::difference_type kmean::getClusterIndex(InputIterator, InputIterator) [with InputIterator = __gnu_cxx::__normal_iterator<double*, std::vector<double, std::allocator<double> > >]': ./cs522/c++/def/kmeandef.hpp:406: note: synthesized method 'boost::lambda::lambda_functor<boost::lambda::identity<ptrdiff_t&> >& boost::lambda::lambda_functor<boost::lambda::identity<ptrdiff_t&> >::operator=(const boost::lambda::lambda_functor<boost::lambda::identity<ptrdiff_t&> >&)' first required here make: *** [project/kmeanMain.o] Error 1

1 0

boost.test create test suites aith auto registration
by Brandon Olivares 19 Dec '07

19 Dec '07

Hi, The documentation says I can use syntax like: BOOST_AUTO_TEST_SUITE( test_suite_name ); // Test cases here BOOST_AUTO_TEST_SUITE_END(); I'm getting no errors, but I find that even when using this, testing errors are reported as being in the master test suite. Sample code: BOOST_AUTO_TEST_SUITE( StringUtility ); BOOST_AUTO_TEST_CASE( getWords ) { // This is only to test functionality of the test library BOOST_CHECK_EQUAL(1, 2); } BOOST_AUTO_TEST_SUITE_END(); Sample output (note that the other test case is from the main file): Running 2 test cases... ./StringUtilityTest.cc(7): error in "getWords": check 1 == 2 failed [1 != 2] *** 1 failure detected in test suite "War" I'd appreciate any help figuring this out. Thanks, Brandon

2 2

Re: [Boost-users] [boost] [serialization] typeid information is not included in archives
by Andrei Popa 19 Dec '07

19 Dec '07

Hi Mahesh, I think I understand better what you are to say. I read about extended_type_info, I will try your solution. Thanks, Andrei _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

1 0

Boost shared pointers, PThreads and void* casts
by STenyaK (Bruno Gonzalez) 19 Dec '07

19 Dec '07

I haven't been able to find any clear explanation about this, so here it goes: I'm coding a multithreaded program using pthreads. The general behaviour is this: -A function starts. -The function creates a shared pointer "OBJ". -The function creates a Thread, passing "OBJ" as the parameter (having to cast it as void*). -The thread starts, getting a (void*) param which is casted back to "OBJ" (shared pointer type). -The function ends, and therefore its "OBJ" goes out of scope. -The thread" ends, so its "OBJ" goes out of scope too. (of course, the thread could at times end before the function instead) I'm afraid that the shared pointer does not behave well due to those nasty void* casts... maybe trying to delete twice the object. What's the proper way of coding this? Weak pointers maybe? Thanks a lot for any help. -- Saludos, Bruno González _______________________________________________ Msn/Jabber: stenyak AT gmail.com ICQ: 153709484 http://www.stenyak.com

5 13

Re: [Boost-users] [boost] [serialization] typeid information is not included in archives
by Andrei Popa 19 Dec '07

19 Dec '07

Hi Mahesh, Actually I thought myself about a such solution. But how do you know to what class do you have to cast(dynamic_cast)? That is the Question! You do not know if you are reading in a "Circle" or a "Line"... If the implementation is made using typeid or class name I do not really care. Regards, Andrei _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

1 0

Install: recommended directory for boost-root?
by Michael Fuller 19 Dec '07

19 Dec '07

I'm installing Boost on a Mac (OS 10.5.1). I realize that I could put the libraries just about anywhere, but is there a recommended directory for the Boost root? Some possibilities I've considered include /opt/local/lib/Boost, opt/local/var/Boost, /Library/Boost, / local/bin/Boost, /local/share/Boost ... Where do you normally install your "third-party" libraries and why? Does the recommended location depend on platform (i.e. Linux, Win, Mac)? Thanks! Mike ========================== Michael Fuller, Ph.D. Faculty of Forestry University of Toronto Toronto, ON M5R 3B3 PHONE: (416) 946-0119 EMAIL: mm.fuller(a)utoronto.ca WEB: www.tiem.utk.edu/~mmfuller

1 0

[program_options] Custom storage
by Adam Badura 19 Dec '07

19 Dec '07

Is there a way to add a different storage for program options (different from available: command line, configuration file, environmental variables)? I would like to use this library (or at least try to) however I must store configuration in Windows Registry. Is it possible now? Will it ever be (as it seems to me that it is not possible now)? Adam Badura

2 1

Segmentation fault with wdirectory_iterator
by Adam Panayis 19 Dec '07

19 Dec '07

Hi, I have a similar problem to the one below. http://lists.boost.org/boost-users/2007/12/32679.php When I try to create a wdirectory_iterator on a wpath I get a segmentation fault. Sample code: #include <iostream> #include <boost/filesystem/config.hpp> #include <boost/filesystem/operations.hpp> #include <boost/filesystem/fstream.hpp> #include <boost/program_options.hpp> #include <boost/scoped_array.hpp> main() { boost::filesystem::wpath wp_t2(L"/"); std::locale::global(std::locale("")); boost::filesystem::wdirectory_iterator wd_1(wp_t2); } I am using boost version 1.34.1 on fedora 7. Can anyone help? Thanks Adam

1 0

Boost.Timer in OSX 10.5
by Tom Smith 19 Dec '07

19 Dec '07

Hi, Since upgrading this computer to OSX 10.5 (from Tiger 10.4), I've had weird boost::timer behaviour - jobs taking 50+ hours report as finishing in ~3000s. It seems similar to the problem here (elapsed_max is the problem, basically): http://lists.boost.org/boost-users/2007/09/30661.php The code in that thread gives elapsed_max() as 4294.97 sec on my system. I guess this is a bug the standard library on 10.5, not a Boost bug, but still - any ideas? Thanks, Tom

1 0

[fusion] bug in end_impl for struct_tag
by Roman Perepelitsa 19 Dec '07

19 Dec '07

I've encountered fusion's behavior that seems to be a bug. #include <boost/mpl/assert.hpp> #include <boost/type_traits/is_same.hpp> #include <boost/fusion/sequence/intrinsic/begin.hpp> #include <boost/fusion/sequence/intrinsic/end.hpp> #include <boost/fusion/adapted/struct/adapt_struct.hpp> #include <boost/fusion/iterator/next.hpp> struct s { int m; }; BOOST_FUSION_ADAPT_STRUCT(s, (int, m)) int main() { using namespace boost::fusion; using boost::is_same; typedef result_of::begin<s>::type b; typedef result_of::end<s>::type e; // this fails BOOST_MPL_ASSERT((is_same<result_of::next<b>::type, e>)); } Here is a patch against trunk: Index: end_impl.hpp =================================================================== --- end_impl.hpp (revision 42137) +++ end_impl.hpp (working copy) @@ -8,6 +8,7 @@ #if !defined(BOOST_FUSION_END_IMPL_24122005_1755) #define BOOST_FUSION_END_IMPL_24122005_1755 +#include <boost/fusion/adapted/struct/extension.hpp> #include <boost/fusion/adapted/struct/struct_iterator.hpp> namespace boost { namespace fusion @@ -25,7 +26,7 @@ template <typename Sequence> struct apply { - typedef struct_iterator<Sequence, 2> type; + typedef struct_iterator<Sequence, struct_size<Sequence>::value> type; static type call(Sequence& v) Regards, Roman Perepelitsa.

2 1

How to debug? - Unable to load Boost.Build: could not find build system.
by Chun Tse 19 Dec '07

19 Dec '07

Hello, I've followed the instructions from here: http://www.boost.org/boost-build2/doc/html/bbv2/installation.html I can build from example hello.cpp from: /usr/share/boost-build/example/hello $ bjam ...found 9 targets... ...updating 5 targets... MkDir1 bin MkDir1 bin\gcc-mingw-3.4.5 MkDir1 bin\gcc-mingw-3.4.5\debug gcc.compile.c++ bin\gcc-mingw-3.4.5\debug\hello.o gcc.link bin\gcc-mingw-3.4.5\debug\hello.exe ...updated 5 targets... /usr/share/boost-build/example/hello $ ls Jamroot bin hello.cpp /usr/share/boost-build/example/hello $ find . . ./bin ./bin/gcc-mingw-3.4.5 ./bin/gcc-mingw-3.4.5/debug ./bin/gcc-mingw-3.4.5/debug/hello.exe ./bin/gcc-mingw-3.4.5/debug/hello.o ./hello.cpp ./Jamroot I copy the example directory to my h drive and edit the ../boost-build.jam so it points to the build system: /h/workspace/example/hello $ cat ../boost-build.jam # Copyright 2002, 2003 Vladimir Prus # Distributed under the Boost Software License, Version 1.0. # (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) boost-build /usr/share/boost-build/kernel ; Then I run bjam and get an error saying it can't find bootstrap.jam. /h/workspace/example/hello $ ls Jamroot hello.cpp /h/workspace/example/hello $ bjam Unable to load Boost.Build: could not find build system. --------------------------------------------------------- h:\workspace\example\boost-build.jam attempted to load the build system by invoking 'boost-build /usr/share/boost-build/kernel ;' but we were unable to find "bootstrap.jam" in the specified directory or in BOOST_BUILD_PATH (searching /usr/share/boost-build/kernel, /usr/share/boost-build). Please consult the documentation at 'http://www.boost.org'. bootstrap.jam is contained in /usr/share/boost-build/kernel $ ls -l /usr/share/boost-build/kernel total 18 -rw-r--r-- 1 mtse Administ 194 Dec 19 17:01 boost-build.jam -rw-r--r-- 1 mtse Administ 4287 Dec 19 16:08 bootstrap.jam -rw-r--r-- 1 mtse Administ 10260 Dec 19 16:08 class.jam -rw-r--r-- 1 mtse Administ 7145 Dec 19 16:08 errors.jam -rw-r--r-- 1 mtse Administ 11414 Dec 19 16:08 modules.jam $ env | grep BOOS BOOST_BUILD_PATH=/usr/share/boost-build What could be wrong? How can I debug this? $ bjam -v Boost.Jam Version 3.1.16. OS=NT. Copyright 1993-2002 Christopher Seiwald and Perforce Software, Inc. Copyright 2001 David Turner. Copyright 2001-2004 David Abrahams. Copyright 2002-2005 Rene Rivera. Copyright 2003-2005 Vladimir Prus. Michael

1 0

[boost-users] hamming distance.
by chun ping wang 18 Dec '07

18 Dec '07

Hi, are their any library in boost where it can help me count the difference of two list. (i.e. the number of items that difference from each other) also known as hamming distance.

1 0

boost with embedded compiler / in embedded area
by Bernhard Merkle 18 Dec '07

18 Dec '07

Hi, I have the following questions about using boost with embedded compilers / in the embedded area 1. what about embedded c++ compiler support in boost ? I saw on [1] some compilers but my list e.g. is - Metrowerks Codewarrior for PPC (v 8.x unfortunately) but the 9.x seems also to have problems - GreenHills C++ (seems to have the EDG parser, so no problem) - ARM C++ an they are not officially supported. Has anyone tried them or others ? experiences ? AFAIK, boost has some requirements to C++ compilers (especially templates) 2. what parts of boost are you using in your (embedded) area ? What parts would you avoid and what is recommendable ? (e.g. statechart, thread, the whole collection/algorithm things) Any performance/size issues ? TIA and kind regads, Berni [1] http://engineering.meta-comm.com/boost-regression/CVS-HEAD/developer/summar… <http://engineering.meta-comm.com/boost-regression/CVS-HEAD/developer/summar…>

2 1

[Statechart] Compilation error with BCB 2007.
by Alfred Handke 18 Dec '07

18 Dec '07

2 1

file descriptor imitation - boost iostreams
by Michał Nowotka 18 Dec '07

18 Dec '07

Hi Boosters, I have a function with following interface: int gvRender (GVC_t *gvc, graph_t *g, char *format, FILE *out) but I don't want to store the output in temporary file but to compute everything in memory... (but to store the output to same malloced string and pass it to a display function). Boost is so powerful - so can I solve this problem somehow using boost (C++ doesn't doesn't provide tools to simulate file descriptors )? I know very little about boost iostream would it be helpful? -- Cheers, Michał Nowotka

2 6

linking problem with Visual Studio 2005
by Andrea Galeazzi 18 Dec '07

18 Dec '07

Hi everybody, I'm trying to use boost in a .NET project written in C++ managed. When I build it in Debug version it's everything alright, but when I do it in Release version I've got this error: error LNK2001: unresolved external symbol "char __cdecl boost::re_detail::w32_toupper(char,unsigned long)" (?w32_toupper@ re_detail@boost@@$$FYADDK@Z). In particular the error above is generated by the following row: regex_replace(std::string(p1, p2), transformer, replace_string,boost::format_all). So now I'm in a bind because I've completed my application but I cannot distribute it due to the fact that .NET allows to deliver only release version. Can some help me? Cheers

2 2

Jamfile to use system boost
by Darren Dale 18 Dec '07

18 Dec '07

Hi, I am new to boost, working through the quickstart example as documented at http://www.boost.org/libs/python/doc/building.html . I have gotten to the point where I can move the test project out of the boot source tree, and run the tests by directing the Jamroot back to the boost source tree. The next step I would like to take is to build the test project using my system's boost (version 1.34.1, installed using gentoo's package manager), rather than the svn checkout. This question has been asked on this list before, but was not resolved: http://www.nabble.com/-python--jam-file-to9942060.html#a9942060 . Is it possible to use boost without the boost source tree? If so, what should I look for so I can point my Jamroot to the right place? As it stands, I am stuck in the same place as the previous poster. If gentoo hasn't installed all of the necessary files, maybe I could improve gentoo's handling of the package. Thank you, Darren

1 0

Interprocess: which version to use?
by Michael Shepanski 18 Dec '07

18 Dec '07

Hello, I want to start using boost::interprocess. My needs are fairly modest, so I don't need a large feature set, but reliability is valuable. Also I need it to be compatible with the rest of boost 1.34.1. So which is the best version of interprocess for me to download and use? Thanks, --- Michael

1 0

Visual Studio .NET 2008 compiler #defines?
by legalize+jeeves＠mail.xmission.com 18 Dec '07

18 Dec '07

[Please do not mail me a copy of your followup] I'm using boost 1.34.1 with the Boost Consultants installer. I tried compiling some code with Visual Studio 2008 and of course 1.34.1 doesn't recognize the compiler and prints out a lot of "compiler not recognized" messages. The code seems to compile OK, but obviously the compiler isn't recognized. Are there plans to update the #defines to recognize VS.NET 2008 soon, or should I do something to update the headers? (Would this mean I'd have to recompile all the libs? I'm using the precompiled libs at the moment.) Thanks in advance. -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

4 4

time_series
by Sebastian Weber 17 Dec '07

17 Dec '07

Hello everyone! I am wondering about the time_series library. It got accepted a while ago and I thought it will be included in boost 1.35.0. However, I can not find time_series in subversion - its not in the trunk, nor in sandbox or any other suspicious places. Only the quite old version in the sandbox on boost-consulting seems to be available. What happened? Can someone enlighten me, please? The library looks really useful and I am willing to use it in my project. Are there any alternatives by the way which can compete with boost.time_series and are as well written in C++? Greetings, Sebastian

2 1

Run-time flavors of Boost (aka lib suffix / runtime-options)
by Benoit Sigoure 17 Dec '07

17 Dec '07

Hello list, Boost libraries often ship compiled in various different "flavors" (compiled with different runtime-options). First off, is there an official place where this is documented? I didn't find any, besides the header `boost/config/auto_link.hpp'. Based on this header, I tried to document the suffix used by Boost libraries as follows: > A suffix is one or more of the following letters: sgdpn (in that > order). s = static > runtime, d = debug build, g = debug/diagnostic runtime, p = STLPort > build, > n = (unsure) STLPort build without iostreams from STLPort (it looks > like `n' > must always be used along with `p'). Additionally, it can start > with `mt-' to > indicate for multi-thread builds. Is this accurate? What is a `static runtime'? My guess is that `-s' is Windows-specific, because on Windows it's common to see both shared libraries and static libraries using the same naming scheme `libfoo.lib' (because in the shared library case, `libfoo.lib' is not a directly shared library but rather an import library), can anyone confirm that? This entails that for most UNIX-like OSes, the `-s' variant doesn't exist, it's the `libfoo.a' static archive that is used instead, is that correct? Cheers, -- Benoit Sigoure aka Tsuna EPITA Research and Development Laboratory

3 3

Error while using read_graphml function of graphml.cpp
by tonyaim83 17 Dec '07

17 Dec '07

Hi. I m making use of the code given on http://article.gmane.org/gmane.comp.lib.boost.devel/146836 I m able to compile these files successfully and also able to link it with the Expat parser. But when i m trying to run this from command prompt it throws me following error. "This application has requested the Runtime to terminate it in an unusual way.Please contact the application's support team for more information." What can the reason for this... Kindly help.. -- View this message in context: http://www.nabble.com/Error-while-using-read_graphml-function-of-graphml.cp… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

BoostCon 2008: May 4-9
by David Abrahams 17 Dec '07

17 Dec '07

The 2nd annual Boost Conference has been scheduled for May 4-9 2008. Please save the date! Registration should open sometime in the next week. If you want to stay at the Aspen Meadows (highly recommended as it is within walking distance of the conference venue and was the site of great after-hours discussions in '07), it's especially important this year that you book your rooms early. Since, unlike last year, Aspen's airport will be open this May, demand for rooms has been heavy. In fact, the following week, which we tried to get, was snapped up by another group before we even had a chance to catch our breath, just weeks after BoostCon'07 ended. We'll be working hard on getting the program together for 2008 over the coming weeks. We hope to include many more Boost authors and contributors, and build in several more intensive library-specific sessions, to make 2008 better than ever. Please send any questions to the BoostCon planning committee at: boostcon-plan(a)lists.boost-consulting.com Those of you who didn't make it to BoostCon'07 may want to have a look at the photo gallery at http://boostcon.com/community/photos, peruse the 2007 program at http://boostcon.com/program, and check out the two trip reports mentioned here: http://boostcon.com/news/2007/Jul/16/yet-another-trip-report. See you in Aspen! -- The BoostCon Planning Committee

1 0

[review] Review of Unordered library begins today December 7
by Ion Gaztañaga 16 Dec '07

16 Dec '07

Hi all, The formal review of the Unordered library, proposed by Daniel James, begins today : *Description*: An implementation of the unordered containers specified in TR1, with most of the changes from the recent draft standards. *Author*: Daniel James *Download*: http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… The documentation is in the zip file. I've put documentation online here: http://igaztanaga.drivehq.com/unordered http://tinyurl.com/yw8wjp What to include in Review Comments ================================== Your comments may be brief or lengthy, but basically the Review Manager needs your evaluation of the library. If you identify problems along the way, please note if they are minor, serious, or showstoppers. Here are some questions you might want to answer in your review: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? And finally, every review should answer this question: * Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. Unordered containers are likely to become one of the most used Boost libraries so I encourage you to review the library in order to see if Unordered fulfills all your expectations. Ion Gaztañaga - Review Manager -

6 8

[boost-users] tokenizer vs string algorithm split.
by chun ping wang 15 Dec '07

15 Dec '07

Hi I was wondering which one is better and faster to split a file of csv value of number and put it into container of double. 1.) Which option is better. // method 1. std::vector<std::string> split_string; boost::algorithm::trim(flist); boost::algorithm::split(split_string, flist, boost::algorithm::is_any_of(",")); std::vector<double> elements; BOOST_FOREACH(std::string s, split_string) { elements += boost::lexical_cast<double>(s); } // method 2. boost::char_separator<char> sep(","); boost::tokenizer<boost::char_separator<char> > tokens(flist, sep); std::vector<double> elements; BOOST_FOREACH(std::string token, tokens) { elements += boost::lexical_cast<double>(token); } 2.) When is it better to use string algorithm split instead of tokenizer and vice versa.

6 10

Re: [Boost-users] Linking problem trying to use mutex, condition
by Brian Krahmer 15 Dec '07

15 Dec '07

So it turns out that I wasn't linking against the thread library. I assumed there wasn't a thread library (all implemented in headers) because when I tried to get it to build by doing 'bjam --with-libraries=regex,serialization,thread', it didn't do anything with thread. I then tried 'bjam --with-thread --with-regex --with-serialization', and that seems to work. BTW, I tried building using a parallel make (-j3), but there were errors in the build process. It appears perhaps there's a bug in the parallel compilation or the jamfile for thread. thanks, brian

2 1

Interprocess documentation
by Stefan Funck 15 Dec '07

15 Dec '07

Hi, could someone please give a hint where to find the interprocess documentation? http://igaztanaga.drivehq.com/interprocess seems to be broken, also http://www.boost.org/regression-logs/cs-win32_metacomm/doc/html/interproces… as given in doc/html/interprocess.html from the current svn trunk does not work. thanks, Stefan

3 2

Linking problem trying to use mutex, condition
by Brian Krahmer 15 Dec '07

15 Dec '07

I'm trying to compile a test program using the ReadWriteMutex example at http://paulbridger.net/read_write_lock, and I'm getting about 30 linking errors referring to mutex, lock_error and the like. I'm on an Ubuntu system, using boost 1.33.1. I'm including "boost/thread/mutex.hpp" and "boost/thread/condition.hpp". I can post more details, but was wondering if anybody was familiar with this problem. thanks, brian

1 0

Can Lambda dynamic create template parameter？
by Guo Xu 15 Dec '07

15 Dec '07

I want to implement the grammar like this, to create template parameter dynamicly, set< int, ( _1 > _2 ) > intset; can lambda do it ,and how to ?

2 1

[signals, MSVC8.1] Hang in signals constructor when upgrading from 1.33.1 to 1.34.1
by Kris Braun 14 Dec '07

14 Dec '07

Hi there, Trying to upgrade from 1.33.1 to 1.34.1 on Visual Studio 2005, I'm experiencing an infinite loop in the signals code. It happens when named_slot_map constructor calls groups.clear(), which ends up in some standard library iterator cleanup code (_Clean_up_iter_debug). It appears there's a circular link in some pointers to parents. This is happening on a debug build with both Boost and my project compiled with _HAS_ITERATOR_DEBUGGING=0. The problem does not appear on non-debug builds. The signals constructor is running inside the function below, which is called during C++ static initialization: static boost::signal< void( E& ) >& GetHandler( void ) { static boost::signal< void( E& ) > _Handler; return _Handler; } Does anybody have any idea what has changed between 1.33.1 and 1.34.1 that would cause this behaviour change? Thanks, Kris --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.

1 0

[Boost.MultiIndex] map by string and search by char*
by dariomt＠gmail.com 14 Dec '07

14 Dec '07

I'm trying to use Boost-MultiIndex to achieve: 1) the equivalent (or similar) functionality & performance of an std::map<std::string, ValType> with searches by std::string 2) perform searches by const char* without creating a temporary std::string and without copying the actual char's --------------------------code----------------------- #include <string> #include <functional> #include <cassert> #include <boost/multi_index_container.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/member.hpp> using namespace boost; using namespace boost::multi_index; struct elem { std::string m_key; double m_value; elem( const std::string& key, double value) : m_key(key), m_value(value) {} }; struct less_string : std::less<std::string> { using std::less<std::string>::operator(); // use operator< bool operator() (const std::string& lhs, const char* rhs) const {return lhs < rhs;} bool operator() (const char* lhs, const std::string& rhs) const {return lhs < rhs;} }; typedef multi_index_container< elem, indexed_by< ordered_unique< member<elem,std::string,&elem::m_key>, less_string > > > elem_set; int main() { elem_set s; s.insert( elem("p", 1.0) ); assert( s.find("p") != s.end() ); // no temporary and no data copy! I did it! return 0; } --------------------------code----------------------- Is this the right way to go? Any hint will be appreciated. TIA PS: I know I'm actually getting something more like a std::set, it's ok

2 1

BGL support for graphml
by abhishek.v＠tcs.com 14 Dec '07

14 Dec '07

Hi.. I have downloaded the graphml.cpp, graphml.hpp, reader_test.cc and the test xml file. To check whether the code posted by Tiago on http://article.gmane.org/gmane.comp.lib.boost.devel/146836 to see if it is working fine or not. I m able to build the project and link the libraries of expat as well in Dev-Cpp. But while executing the exe file i m getting an error "This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information." What could be the reason for this. Also i want to know from where i should download the latest version of graphml.cpp and graphml.hpp. As i have downloaded the latest version of boost from the sourceforge site but in this the graphml.cpp and graphml.hpp files are missing. Currently i m working with the version of Tiago but let me know if stable version are going to be included in the standard boost package or this itself is a the latest and stable version and i m missing out something. Thanks 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

STL Maps
by merlin antony 14 Dec '07

14 Dec '07

hi, i'm using stl maps in my project to create maps. this stl maps is datatype specific. eg map<int,int>, map <string,int>, etc.. is they any way to create a template map like map<T,T>. so that the map is compatible across any datatype being passed to it? is it possible to do in boost library by using property map concept? thanx, merlin.

2 1

Recursive grammar problem
by john 14 Dec '07

14 Dec '07

Hello, I have a string I want to parse that is like that A or A or A or ( C or C or C or ( D) or C) or B. Obviously A and B are just something else but we don't care about it here. I define it as mystring = (A | (ch_p('(') >> A >> ch_p(')'))) >> * ("or" >> (A | mystring)) the problem is that as this is exactly the same over and over, I'm getting the end results in the furthest mystring possible: B will be part of "( C or C or C or ( D) or C) or B" and not of the total string and that messes my grammar :( I have no idea how to pass that trouble, so any help on that would be appreciated (well if anyone understood what I said ;) ) Thanks

2 1

Serialization of STL containers?
by Joseph Turian 14 Dec '07

14 Dec '07

I am unable to serialize STL containers. Here's an example, with error message foo.cpp: #include <iostream> #include <fstream> #include <boost/archive/text_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/serialization/list.hpp> #include <boost/archive/tmpdir.hpp> class bus_route { friend class boost::serialization::access; std::list<int> stops; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & stops; } public: bus_route(){} }; main() { std::ofstream ofs("removeme"); boost::archive::text_oarchive oa(ofs); bus_route a; oa << a; } ==== $ gcc -o foo foo.cpp /usr/include/boost/archive/detail/oserializer.hpp: In function 'void boost::archive::save(Archive&, T&) [with Archive = boost::archive::text_oarchive, T = bus_route]': /usr/include/boost/archive/basic_text_oarchive.hpp:78: instantiated from 'void boost::archive::basic_text_oarchive<Archive>::save_override(T&, int) [with T = bus_route, Archive = boost::archive::text_oarchive]' /usr/include/boost/archive/detail/interface_oarchive.hpp:78: instantiated from 'Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = bus_route, Archive = boost::archive::text_oarchive]' foo.cpp:29: instantiated from here /usr/include/boost/archive/detail/oserializer.hpp:567: error: invalid application of 'sizeof' to incomplete type 'boost::STATIC_ASSERTION_FAILURE<false>' Any idea what I'm doing wrong?

2 3

weird bug, std::list nodes don't work properly with pool_allocator.
by Flogromp N. 14 Dec '07

14 Dec '07

/* The pool allocator is not being used properly, somehow, with std::list. When you go to purge the pool, it says nothing was purged, because nothing is even registered as being allocated in the pool. What is going on here? I have included copious debugging information. I've even provided a dummy modification of the boost::pool_allocator class to show what's going on. It's weird. If you change l_type to an std::vector, everything will work, and the output will be: purged? 1 This program outputs the following when l_type is std::list, debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::debug_pool_allocator() [with Tag = foo_tag, T = int, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::debug_pool_allocator(const debug_pool_allocator<Tag, U, UserAllocator, Mutex, NextSize>&) [with U = int, Tag = foo_tag, T = std::_List_node<int>, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] static T* debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::allocate(typename boost::pool<UserAllocator>::size_type) [with Tag = foo_tag, T = std::_List_node<int>, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] --- static T* debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::allocate(typename boost::pool<UserAllocator>::size_type) [with Tag = foo_tag, T = std::_List_node<int>, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] --- ... purged? 0 released? 0 This program outputs the following when l_type is std::vector, debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::debug_pool_allocator() [with Tag = foo_tag, T = int, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] static T* debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::allocate(typename boost::pool<UserAllocator>::size_type) [with Tag = foo_tag, T = int, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] --- static T* debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::allocate(typename boost::pool<UserAllocator>::size_type) [with Tag = foo_tag, T = int, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] static void debug_pool_allocator<Tag, T, UserAllocator, Mutex, NextSize>::deallocate(T*, typename boost::pool<UserAllocator>::size_type) [with Tag = foo_tag, T = int, UserAllocator = boost::default_user_allocator_new_delete, Mutex = boost::details::pool::default_mutex, unsigned int NextSize = 32u] --- ... purged? 1 released? 0 */ #include <iostream> using std::cout; using std::endl; #include <list> #include <vector> #include <boost/current_function.hpp> #include <boost/limits.hpp> // std::numeric_limits #include <new> // std::bad_alloc #include <boost/pool/poolfwd.hpp> #include <boost/pool/singleton_pool.hpp> #include <boost/pool/pool_alloc.hpp> #define DEBUG_FUNC cout << BOOST_CURRENT_FUNCTION << " " << endl template < class Tag, class T, class UserAllocator = boost::default_user_allocator_new_delete, class Mutex = boost::details::pool::default_mutex, unsigned NextSize = 32 > class debug_pool_allocator { public: typedef T value_type; typedef UserAllocator user_allocator; typedef Mutex mutex; static unsigned const next_size = NextSize; typedef value_type* pointer; typedef value_type const* const_pointer; typedef value_type& reference; typedef value_type const& const_reference; typedef typename boost::pool<UserAllocator>::size_type size_type; typedef typename boost::pool<UserAllocator>::difference_type difference_type; template <class U> struct rebind { typedef debug_pool_allocator<Tag, U, UserAllocator, Mutex, NextSize> other; }; debug_pool_allocator() { DEBUG_FUNC; } // default copy constructor // default assignment operator // not explicit, mimicking std::allocator [20.4.1] template <class U> debug_pool_allocator( debug_pool_allocator<Tag, U, UserAllocator, Mutex, NextSize> const& ) { DEBUG_FUNC; } // default destructor static pointer address(reference r) { DEBUG_FUNC; return &r; } static const_pointer address(const_reference s) { DEBUG_FUNC; return &s; } static size_type max_size() { DEBUG_FUNC; return (std::numeric_limits<size_type>::max)(); } static void construct(pointer const ptr, value_type const& t) { DEBUG_FUNC; new(ptr) T(t); } static void destroy(pointer const ptr) { DEBUG_FUNC; ptr->~T(); } bool operator==(debug_pool_allocator const&) const { DEBUG_FUNC; return true; } bool operator!=(debug_pool_allocator const&) const { DEBUG_FUNC; return false; } static pointer allocate(size_type const n) { DEBUG_FUNC; const pointer ret = static_cast<pointer>( boost::singleton_pool< Tag, sizeof(T), UserAllocator, Mutex, NextSize >::ordered_malloc(n) ) ; if (ret == 0) throw std::bad_alloc(); return ret; } static pointer allocate(size_type const n, void const* const) { DEBUG_FUNC; return allocate(n); } static void deallocate(pointer const ptr, size_type const n) { DEBUG_FUNC; boost::singleton_pool< Tag, sizeof(T), UserAllocator, Mutex, NextSize >::ordered_free(ptr, n); } }; // --- struct foo_tag {}; // IF YOU CHANGE THIS TO std::vector, IT WILL DEALLOCATE PROPERLY! typedef std::list< int, debug_pool_allocator<foo_tag, int> > l_type; int main() { bool success = false; l_type* l = new l_type; for (int i=0; i<2; ++i) { l->push_back(444); cout << "---" << endl; } cout << "..." << endl; success = boost::singleton_pool<foo_tag, sizeof(int)>::purge_memory(); cout << "purged? " << success << endl; success = boost::singleton_pool<foo_tag, sizeof(int)>::release_memory(); cout << "released? " << success << endl; }

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[review] Boost.Functional/Forward - result
by John Torjo 13 Dec '07

13 Dec '07

Hi all, I'm happy to announce that The Boost.Functional/Forward library has been accepted into Boost. Congrats to Tobias for a great lib! Summary: 5 reviews, all positive. Suggestions for improvement: - Automatically detect if the compiler supports variadic templates and rvalue references and use those instead. This can be a useful portability utility when such compilers become more common. - It should use compressed_pair to store the wrapped function object to take advantage of EBO. - more tweakable parameters for specific uses - like, arity 3 for function X, and arity 5 for function Y - Docs: add more material explaining the forwarding problem - Docs: should be explicitly specified that the wrapped function object must be result_of compatible - Docs: A discussion of the impact of the library on compile time (especially with high values of N) Best, John -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

2 1

[boost::logging] flushing rolling_file
by Benjamin de Dardel 13 Dec '07

13 Dec '07

Hi all, Does anybody use boost::logging ? I wonder if it's possible to flush logs in a rolling_file as in a standard file (flush_each_time) ? It would be nice ! Thanks, Benjamin

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Re: [Boost-users] [boost] [review] Gentle reminder - Fast track formal review of Boost.Functional/Factory will begin December 17
by John Torjo 13 Dec '07

13 Dec '07

Joel de Guzman wrote: > John Torjo wrote: > >> Hi all, >> >> This is a gentle reminder of the Boost.Functional/Factory review, about >> to start next Monday. >> >> >> Factories are callback mechanisms for constructors, so we provide two >> function objects, boost::value_factory and boost::factory, that >> encasulate object construction through direct application of the >> constructor or operator new, respectively. These templates make other >> facilities that operate on function objects (such as standard >> algorithms, Boost.Bind, Boost.Function, or Fusion functional adapters) >> applicable to constructors. >> >> Get it from here: >> http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… >> > > Link to docs please? Thanks! > > I've posted them temporarily on my site - http://www.torjo.com/tobias/ Best, John -- http://John.Torjo.com -- C++ expert ... call me only if you want things done right

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Re: [Boost-users] BGL Max flow min cut
by Line B. Reinhardt 13 Dec '07

13 Dec '07

It is mostly the reverse edge I have problem with. My graph is not necessarily a complete graph and therefore in my graph an reverse edge does not always exist. However I would like to introduce just when running the algorithm. I think I will need two graphs but maybe have a map between the edges which are cooresponding in both graphs. Thanks for your answer. Best regards Line On Dec 10, 2007 7:37 AM, Line B. Reinhardt <lbr(a)ctt.dtu.dk> wrote: > Dear All > I would like some help with graph structure for the edmund_karp max flow min cut function. > I have a general graph in which I have many properties + edge and vertex. I sould like to run edmund karp on this graph however I have not been able to make the structure right for edmund karp and therefore I have made a second graph a flow graph. However I do not want to copy edges over every time I change something in the original graph. I was wundering if I could make it the same graph or just make the flow graph a filteret version of the original graph. > The graphs are defined as follows:: <snip> Hi Line, Can you explain what you mean by "have not been able to make the structure right"? Your original graph needs to have reversed edges (for every edge (u,v) in the graph, (v,u) needs to also be in the graph), but unless you're missing that, you should be able to avoid having to create a separate graph to pass in. If you are missing reversed edges, you won't be able to add them through a filtered graph - a filtered graph only lets you remove some set of vertices and/or edges from the graph. Regards, Aaron _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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[review] Review of Unordered library started December 7 and still running!
by Ion Gaztañaga 13 Dec '07

13 Dec '07

Hi all, The formal review of the Unordered library started December 7, we have a few nice reviews, but they are not enough. If you are interested in the library (and I *know* you are), please take some time to review it. This is the info you need to do a review: *Description*: An implementation of the unordered containers specified in TR1, with most of the changes from the recent draft standards. *Author*: Daniel James *Download*: http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… The documentation is in the zip file. I've put documentation online here: http://igaztanaga.drivehq.com/unordered http://tinyurl.com/yw8wjp What to include in Review Comments ================================== Your comments may be brief or lengthy, but basically the Review Manager needs your evaluation of the library. If you identify problems along the way, please note if they are minor, serious, or showstoppers. Here are some questions you might want to answer in your review: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? And finally, every review should answer this question: * Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. Ion Gaztañaga - Review Manager -

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a bug in lambda
by Guo Xu 12 Dec '07

12 Dec '07

i found that , when int a = 2, b = 0 the expression max( (_1 - _2 - 4)( a, b ) , 0 ); should return 0, but return -2, why ? is it a bug in lambda?

2 1

[accumulators] Compilation Problem
by Olivier Tournaire 12 Dec '07

12 Dec '07

Hi all, I am trying to use boost::accumulators lib and I would appreciate some help. I do not know how to use the tag::density. How do I use : accumulator_set<double, tag::density > angular_acc; and set density::cache_size density::num_bins To have for example 10 subdivisions between -pi and pi ? Then, how do I extract the results of the accumulation ? Regards Olivier -- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.

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Bug in filesystem library? (wpath, wdirectory_iterator)
by Olivier Delande 12 Dec '07

12 Dec '07

I noticed something which looks pretty much like a bug in the filesystem library. Both version 1.34.1 and CVS are affected under Linux. I do not know about other versions/platforms. If I compile and run the following code ----------------------------------- #include <boost/filesystem.hpp> #include <iostream> int main(int argc, char *argv[]) { boost::filesystem::wpath p(L"/"); boost::filesystem::wdirectory_iterator i(p); return 0; } ----------------------------------- then I get an exception: ----------------------------------- 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: Invalid argument Aborted ----------------------------------- However, the following alternate version (which uses char instead of wchar_t) works: ----------------------------------- #include <boost/filesystem.hpp> #include <iostream> int main(int argc, char *argv[]) { boost::filesystem::path p("/"); boost::filesystem::directory_iterator i(p); return 0; } ----------------------------------- Has anyone ever found a way to cope with that or filed a bug? Thanks -- Olivier

1 0

maps and constructor
by Hicham Mouline 12 Dec '07

12 Dec '07

Hello, I am attempting to design a class: class C { std::map<double, const A> ma; std::map<double, const B> ma; . public: C(...); }; The keys in the 2 maps are always identical. So I could choose: std::map<double, const std::pair<A,B> > or std::map<double, const std::pair<A,B>* > (ps: AFAIK, using a const-ref for the pair is impossible, but possible with some boost classes) Q1: Is there a difference in memory usage, in access speed or in code readability between the top choice and bottom ones? Q2: Between the 2 bottom ones (storing the pair object in the map vs storing the ptr) Q3: For users of class C, what sort of constructors should I offer? C::C(const std::map<double, const std::pair<A,B>* >& ) Or, should I allow adding elements to the map after the object being constructed? C::add(double, const A&, const B&) Are there better ways with boost classes? Thank you for boost and your time, Rds,

1 0

Re: [Boost-users] [File System] unresolved symbol unsigned int boost::filesystem::detail::not_found_error after upgrade from boost 1_34_0 to 1_34_1
by Bill McLean 12 Dec '07

12 Dec '07

Oops. The below is no longer a problem. In order to resolve the problem, I reinstalled boost from Boost Consulting and had it install all the libraries. One I dropped my belief that I had done everything correctly and I redid the installation was I able to resolve the problem. Bill McLean -----Original Message----- From: Bill McLean [mailto:bill@mcleansoftware.com] Sent: Wednesday, December 12, 2007 11:55 AM To: 'boost-users(a)lists.boost.org' Subject: [File System] unresolved symbol unsigned int boost::filesystem::detail::not_found_error after upgrade from boost 1_34_0 to 1_34_1 After upgrading from Boost 1.34.0 to 1.34.1, I get the Visual Studio 2005 error and building my project: Error 805 error LNK2001: unresolved external symbol "unsigned int boost::filesystem::detail::not_found_error" (?not_found_error@detail@filesystem@boost@@3IA) FolderProcessing.obj I have isolated the error to the declaration: boost::filesystem::directory_iterator it(folder); Using boost 1_34_0 the above declaration worked and with 1_34_0 it fails. I have copied the installed boost 1.34.1 (from Boost Consulting) C:\Program Files\boost\boost_1_34_1 to my project folder C:\projects\ardev\CurrentDev\ExternalLibs\boost where I copied the new boost 1_34_1 release over top the 1_34_0 release. All references to 1_34_0 libraries have been changed to 1_34_1 libraries: ... boost_signals-vc80-mt-gd-1_34_1.lib boost_thread-vc80-mt-gd-1_34_1.lib boost_filesystem-vc80-mt-gd-1_34_1.lib

1 0

Re: [Boost-users] build boost.python tutorial "hello world" without bjam
by damny＠web.de 12 Dec '07

12 Dec '07

hi. in result of your post, i changed my original bat like this: // --- snip ----------------------------------------------------------------------------- SET DIR_MINGW=c:\development_compiler\mingw\ SET DIR_BOOST=c:\development_compiler\_boost\ SET DIR_PYTHN=c:\development_compiler\python25\ SET DIR_PRJCT=%~dp0 SET NME_PRJCT=hello SET CC=c:\development_compiler\mingw\bin\g++.exe SET LD=c:\development_compiler\mingw\bin\ld.exe SET INCL=-I%DIR_BOOST%include\boost-1_34_1 -I%DIR_PYTHN%include -I%DIR_MINGW%include SET LIBS=-L%DIR_BOOST%lib -L%DIR_PYTHN%libs -L%DIR_MINGW%lib %CC% -O0 -shared %INCL% %DIR_PRJCT%%NME_PRJCT%.cpp ^ %LIBS% %DIR_BOOST%lib\boost_python-mgw34-1_34_1.a -lpython25 ^ -o %NME_PRJCT%.pyd // --- snip ----------------------------------------------------------------------------- in association with "boost_python-mgw34-1_34_1.dll" the "hello world" demo works *YeahHa*. but is there a possibility to avoid the necessity of using the dll? :o) daniel > -----Ursprüngliche Nachricht----- > Von: boost-users(a)lists.boost.org > Gesendet: 05.12.07 15:37:35 > An: boost-users(a)lists.boost.org > Betreff: Re: [Boost-users] build boost.python tutorial "hello world" without bjam > > damny(a)web.de wrote: > > > thanks for your replay, > > > > but nothing happens when i reorder the compile command. > > like before, the same error messages appear. > > > > are there any other ideas? i'm at a loss. > > OK, the only other thing I can offer is the output if the commands invoked > by bjam when building this tutorial example: > > ---%<--- > C:\src\boost\BOOST_~3\libs\python\example\tutorial>bjam -d+2 --toolset=gcc > 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). > gcc.compile.c++ bin\gcc-mingw-3.4.2\debug\hello.o > > "g++" -ftemplate-depth-128 -O0 -fno-inline -Wall -g > -I"..\..\..\.." -I"C:\Python25\Include" -c -o > "bin\gcc-mingw-3.4.2\debug\hello.o" "hello.cpp" > > gcc.link.dll bin\gcc-mingw-3.4.2\debug\hello.a > bin\gcc-mingw-3.4.2\debug\hello.pyd > > "g++" -L"C:\Python25\libs" -Wl,-R -Wl,"C:\Python25" -Wl,-R > -Wl,"C:\Python25\libs" "-Wl,--out-implib,bin\gcc-mingw-3.4.2\debug\hello.a" > -o "bin\gcc-mingw-3.4 > .2\debug\hello.pyd" -shared -Wl,--start-group > "bin\gcc-mingw-3.4.2\debug\hello.o" > "..\..\..\..\bin.v2\libs\python\build\gcc-mingw-3.4.2\debug\boost_python-mgw3 > 4-d-1_34_1.a" -lpython25 -Wl,--end-group -g > > Creating library file: bin\gcc-mingw-3.4.2\debug\hello.a > --->%--- > > Here you can see the exact command used to compile and link the tutorial > example in boost 1.34.1. > > Maybe this gets you started. > > HTH, Markus > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > _____________________________________________________________________ Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! http://smartsurfer.web.de/?mc=100071&distributionid=000000000066

2 1

identification of thread
by Igor 12 Dec '07

12 Dec '07

Hi, Could you please explain for beginner in thread-related business, how the thread is identified from itself? Can the program, that it the given thread, obtain its own number or an index of itself? I assume that there should be some enumeration such as numbering the main program by 0, next child thread by 1, etc.? And, in particular, is this number available from boost thread library? THanks in advance Igor

4 3

iterator_range compile problem
by Olivier Tournaire 12 Dec '07

12 Dec '07

Hi all, I am having problem while compiling this code : typedef std::pair<double,double> t_pair; typedef std::vector< t_pair > t_vector; typedef t_vector::iterator t_iterator; typedef iterator_range< t_iterator > histogram_type; // syntax error : missing ';' before '<' Do you have any issue ? Regards Olivier -- Le temps des cerises reviendra. Dans l'immédiat, c'est le temps des noyaux. Courage.

2 2

boost::random issue with icc on Windows
by Geoff Wedig 12 Dec '07

12 Dec '07

Hello, We are experiencing a problem with boost::random using icc on Windows under optimization. If we compile with the -O1 option, we get correct behavior. Compiling with -O2 or no -O option gives us a string of zeros. We have compiled a small test case which shows this problem: #include "boost/function.hpp" #include "boost/random.hpp" #include <iostream> #include <iomanip> using namespace std; typedef boost::lagged_fibonacci607 RGType; typedef boost::uniform_smallint<> DistType; typedef boost::variate_generator<RGType, DistType> GeneratorType; int main() { DistType mainDist(0,10000); RGType mainEng((boost::uint32_t) 12); GeneratorType mainGen(mainEng, mainDist); for(size_t i = 0; i != 10; ++i) cout << mainGen() << ", "; cout << endl; } To date, I've done a lot of hunting trying different compiler options to attack this problem. The compiler option which seems to have the most consistent effect, in that adding it makes the program work, whereas removing it makes it not is -Qunroll0. I am guessing something in the optimization is causing the generator not to initialize properly, but I do not, at present, know how to solve it. Has anyone else seen this, or have any ideas what might be going wrong? I appreciate any ideas. Thanks, Geoff Wedig Digital Domain

3 4

Constant floats
by Robert Dailey 12 Dec '07

12 Dec '07

Is there a way I can define constant floats within class scope like you can with integral values? I was hoping boost could help in this area. For example: struct default_alpha { static const float value = 1.0f; }; The above is not legal, of course. Anyone? Thanks.

6 12

[File System] unresolved symbol unsigned int boost::filesystem::detail::not_found_error after upgrade from boost 1_34_0 to 1_34_1
by Bill McLean 12 Dec '07

12 Dec '07

After upgrading from Boost 1.34.0 to 1.34.1, I get the Visual Studio 2005 error and building my project: Error 805 error LNK2001: unresolved external symbol "unsigned int boost::filesystem::detail::not_found_error" (?not_found_error@detail@filesystem@boost@@3IA) FolderProcessing.obj I have isolated the error to the declaration: boost::filesystem::directory_iterator it(folder); Using boost 1_34_0 the above declaration worked and with 1_34_0 it fails. I have copied the installed boost 1.34.1 (from Boost Consulting) C:\Program Files\boost\boost_1_34_1 to my project folder C:\projects\ardev\CurrentDev\ExternalLibs\boost where I copied the new boost 1_34_1 release over top the 1_34_0 release. All references to 1_34_0 libraries have been changed to 1_34_1 libraries: ... boost_signals-vc80-mt-gd-1_34_1.lib boost_thread-vc80-mt-gd-1_34_1.lib boost_filesystem-vc80-mt-gd-1_34_1.lib

1 0

[program_options] std::wstring ??
by Robert Bielik 12 Dec '07

12 Dec '07

I've tried using the std::wstring with program options, couldn't make it work, only with std::string. Any workarounds? TIA /R

2 4