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Re: [Boost-users] Simple regex question
by david v 05 Jul '07

05 Jul '07

Right, That's the confusion here !!!! thanks.!! Gottlob Frege wrote: >On 7/4/07, david v <danova_fr(a)hotmail.com> wrote: >>Ok i understand david and divad is the same so it's normal to find it >>twice, >>however why it always return as match "David" and not both matches "david" >>and "divad" in the order they appear in the searched string??? does not >>make >>sense to me ?? How can i get the matches in the same order they appear in >>the string ?? >> > >match returns what part of the input string matched the regex, not >what part of the regex matched the input string. > >so >regex = "f*.r" >stringtosearch = "foobarblah" > >match is "foobar" not "f*.r" > >Is that the confusion here? > >Tony _________________________________________________________________ MSN Messenger : appels gratuits de PC à PC ! http://www.msn.fr/newhotmail/Default.asp?Ath=f

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[Boost.Random] C2825 in pass_through_engine.hpp when compiling on VS2005
by Gabriele Rizzo 05 Jul '07

05 Jul '07

Hi everyone, hope someone could help me... I'm using Boost Libraries 1.34.0 (actually Boost.Random only) in a VS2005 VC++ project. I've read the behaviour of these libraries on this platform at http://tinyurl.com/38pbp2 and all results on machines using this compiler are marked "pass", so it should work... But not for me, and I cannot really find why. Here is the code (more or less), cut'n'pasted from all around the project //begin code #include <boost/random.hpp> //commenting this line is uninfluential #include <boost/random/variate_generator.hpp> #include <boost/random/mersenne_twister.hpp> #include <boost/random/lagged_fibonacci.hpp> #include <boost/random/uniform_int.hpp> #include <boost/random/normal_distribution.hpp> boost::mt19937 Engine_Int; boost::lagged_fibonacci19937 Engine_Double; boost::uniform_int< > Uniform( 0, RAND_MAX ); boost::variate_generator< boost::mt19937&, boost::uniform_int< > > MyRand( Engine_Int, Uniform ); boost::normal_distribution< > Gaussian( 20, sqrt( (double) 20) ); boost::variate_generator< boost::lagged_fibonacci19937&, boost::normal_distribution< > > MyGaussianRand( Engine_Double, Gaussian ); unsigned SeedGenerator( unsigned uSeed ) { Engine_Int.seed( (boost::mt19937::result_type) uSeed ); Engine_Double.seed( uSeed ); return( uSeed ); } int main( ) { //do something... return EXIT_SUCCESS } //end code Does someone have a guess? Thanks a lot Gabriele

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Boost::Thread 1.34 - Acess Violation at runtime (release-static)
by Mario Figueiredo 05 Jul '07

05 Jul '07

Hello everyone, I get an access violation at runtime after building against the boost::test release static library. The error doesn't occur with the debug static library. -> MinGW 3.4.5 (last updated 2007-03-26) -> Running Windows XP with SP2 Furthermore, Access violation also occurs after building (against the static-debug lib) doc\boost_1_34_0\libs\test\example\unit_test_example_02.cpp Output occurs as expected, but Access Violation is triggered at system error BOOST_CHECK. No output for this error is shown on screen. Can't seem to be able to copy-paste call stack without triggering a top-posting warning. Let me know if you need it and I'll try to format it. Anyone else experienced this two problems?

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[wave] some more question...
by Ovanes Markarian 04 Jul '07

04 Jul '07

Hello Hartmut! I have a file delived from some processor manufacturer which I can not change. In the file I have following defines, which wave can't parse: #define UINT_MAX 4294967295U #define ULONG_MAX 1099511627775U First error which happens during parsing of UINT_MAX is: description: error: ill formed integer literal or integer constant too large: 4294967295U I do not understand why I get the first error, since the value 4294967295U is 0xFFFFFFFF which is 32 bits long and should be fine (since it is also marked as unsigned for the preprocessor)... Clearly the ULONG_MAX has a wrong numeric format (should be 1099511627775UL or 1099511627775ul), but unfortunately this file comes from some vendor and is deeply incorporated into the build process, so that it can not easily be changed. What do you think, could be the possible solution in this case? My other question would be: Is there any change to allow the hooking interface to specify, which preprocessor directives should be expanded, an which not. Let me summarize: I need some few macros to be expanded, which are defined in some 2-3 headers and I do not want wave to preprocess everything (huge source dir). Ideally, it would be great to have some functionality, which can notify the preprocessor whether to skip the preprocessing directive or not, e.g. function void found_include_directive(std::string const &filename, bool include_next); (as well as other functions like expanding_function_like_macro) from the default_preprocessing_hooks interface could additionaly return bool value, which would notify the preprocessor whether to include and expand the file/macro or not. May be in this second case I could solve the first problem as well, since I don't really need these defines, they are parsed as part of dependency, which is not required in my case. With Kind Regards, Ovanes Markarian

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get all the elements with a certain value with multi_index
by boost＠larroy.com 04 Jul '07

04 Jul '07

Hello I'm trying to use multi_index with an ordered_non_unique index. My question is how can I perform a search like with "find(key)" and get all the elements that match that key. Since find only returns one element that match, and there can be several in the container. I've tried to iterate "count(key)" times with the iterator returned by find but doesn't seem to work. Is there a way to do this? Regards -- Pedro Larroy Tovar, pedro at larroy dot com | http://pedro.larroy.com/ * Las patentes de programación son nocivas para la innovación * http://proinnova.hispalinux.es/

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Re: [Boost-users] Simple regex question
by david v 04 Jul '07

04 Jul '07

Ok i understand david and divad is the same so it's normal to find it twice, however why it always return as match "David" and not both matches "david" and "divad" in the order they appear in the searched string??? does not make sense to me ?? How can i get the matches in the same order they appear in the string ?? david v wrote: > > Hello, > > I'm trying to use regex_search to look for regular expressions. > > > > regex = (david|divad) > > stringtosearch = "david" > > > > > > So I'm looking for regex above in the string "david". As you see a > > very basic example. I'm expecting to find two hits, but I thought I > > should recover "david" and "david" and not twice the same match > > "david" ??? > > > > Here is a snippet of the code: > > > > .... > > boost::smatch match; > > start = stringtosearch.begin(); //that would be the start of "david" > > end = stringtosearch.end(); // that would be the end of "david" > > old_pos = 0; > > cout << "Looking for regex:" << regex << " in string " << > > stringtosearch << endl; > > while (boost::regex_search(start,end,match,regex)) > > { > > > > > > old_pos += match.position()+1; > > std::string t = match[0]; > > > > std::cout << "\tFound:" << match[0] << endl; > > > > old_pos += match.length(); > > start = match[0].second; > > > > > > } > > catch(const std::exception &regex) > > { > > std::cerr << "Exception:" << regex.what() << std::endl; > > exit(-1); > > } > > > > > > Here is the output: > > Looking for regex:(david|divad) in string david > > Found david > > Looking for regex:(david|divad) in string david > > Found david > > > > As you can see, pattern "david" is found twice ??? I was expecting two > > different patterns to be found "david" and "divad". Um, because the stringtosearch contains "divad" both times the code is called? > > cout << "Looking for regex:" << regex << " in string " << > > stringtosearch << endl; Outputs > > Looking for regex:(david|divad) in string david Both times. > > By the way how can I recover the total number of matches found ?? By keeping count? John. _________________________________________________________________ Testez Windows Live Mail Beta ! http://www.ideas.live.com/

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Using lambda bind as destruct functor to shared_ptr
by Scott French 04 Jul '07

04 Jul '07

Hello, Should the following code sample work? It is the simplest reproduction case I could come up with: #include <boost/lambda/lambda.hpp> #include <boost/lambda/bind.hpp> #include <boost/shared_ptr.hpp> #include <stdlib.h> using namespace std; using namespace boost; using namespace boost::lambda; int main(void) { void * myResource = malloc(5); shared_ptr<void> mySharedResource(myResource, bind(free, _1)); } I get a compile error using g++ 4.0.1 on Mac OS X: /Documents/boost_1_34_0/boost/detail/sp_counted_impl.hpp: In member function 'void* boost::detail::sp_counted_impl_pd<P, D>::get_deleter(const std::type_info&) [with P = void*, D = boost::lambda::lambda_functor<boost::lambda:: lambda_functor_base<boost::lambda:: action<2, boost::lambda::function_action<2, void> >, boost::tuples::tuple<void (&)(void*), const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >]': test.cpp:13: instantiated from here /Documents/boost_1_34_0/boost/detail/sp_counted_impl.hpp:150: error: no match for ternary 'operator?:' in '(+ ti)->std::type_info::operator==(((const std::type_info&)((const std::type_info*)(& _ZTIN5boost6lambda14lambda_functorINS0_19lambda_functor_baseINS0_6action ILi2ENS0 _15function_actionILi2EvEEEENS_6tuples5tupleIRFvPvEKNS1_INS0_11placehold erILi1EE EEENS7_9null_typeESG_SG_SG_SG_SG_SG_SG_EEEEEE)))) ? boost::lambda::operator&(const boost::lambda::lambda_functor<T>&) [with Arg = boost::lambda::lambda_functor_base<boost::lambda::action<2, boost::lambda::function_action<2, void> >, boost::tuples::tuple<void (&)(void*), const boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> >]() : 0' Of course, just using "free" instead of bind(free, _1) works, but my real case is more complicated and this appears to be a general conflict between lambda::bind and shared_ptr. Thanks, Scott French

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[IBD] Weekly news: 2007-06-27 to 2007-07-03
by Matias Capeletto 04 Jul '07

04 Jul '07

================================================== Hi Boost, Once a week, we will send you a brief of our work for the Improving Boost Docs project. We need more hands, join us! We are waiting you on the boost-docs list. More information: http://svn.boost.org/trac/boost/wiki/ImprovingBoostDocs ================================================== 2007-07-03 ------------------------------------------------------------------------------------- * A new community builder tool for the project: Linked In. Be part of our network of trust. * Change date format to be ISO 8601 compliant. * Ohloh statistics for our project. 2007-07-02 ------------------------------------------------------------------------------- * New project: Boost Debugger Visualizers. Welcome Filip! * Formal presentation of the project. 32 downloads on the first 12 hours! * Initial structure of the Boost Glue docs project. 2007-07-01 ------------------------------------------------------------------------------- * First Release of Boost Docs! 2007-06-30 ------------------------------------------------------------------------------- * We will use ohloh as a community builder tool and for statistics about our project. * Two new objectives: Standard C++ Library Boosted Docs and Documentation Best Practices. 2007-06-29 ------------------------------------------------------------------------------- * Stuart Dootson will be our browser testing manager. Thanks! * Add fancy graphics to the wiki. 2007-06-28 ------------------------------------------------------------------------------- * The formal objectives of the project have been outlined. * We are trying to build a long term community of people that cares and constantly improve Boost docs. With that in mind new sections have been created: Subprojects, People, and Acknowledgments; including pictures of us to make us feel as a group. * The community is growing: Peter Foley starts the SVG icons set project. Welcome Peter! 2007-06-27 ------------------------------------------------------------------------------- * Help needed for a new project: Boost specific WikiMacros * "Quickbook as a WikiProcessor for our Trac", let us know we can count on you! Best regards Improving Boost Docs Crowd

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Iteratiing on regex results with pointer-to-member-function
by Alain Leblanc 04 Jul '07

04 Jul '07

Hi, I wrote some code where I want to iterate on the result of a regex matching and call a member function for each match. It goes roughly like this: ====================================================================== class XX { typedef bool (XX::*FuncPtr)(const boost::match_results<std::string::const_iterator>& what); FuncPtr funcPtr; }; bool XX::regex_callback(const boost::match_results<std::string::const_iterator>& what) { return true; } void XX::addDelayedVariables(string expr) { funcPtr = &XX::regex_callback; regex re("([[:alpha::]][[:alnum]]+)(\[[^\\]]+])"); sregex_iterator m1(expr.begin(), expr.end(), re); sregex_iterator m2; match_results<string::const_iterator> results; (*) bool a = (this->*funcPtr)(results); (*) for_each(m1, m2, (this->*funcPtr)); (#) } =========================================================================== When compiling (gcc 4.1 on FC 6) I get an error message at (#) that says: invalid use of non-static member function I added the two lines with a (*) as a sanity check to see that I declared the pointer-to-member-function correctly, and I have no problem compiling those. So my question is: is this a problem with me not understanding how to handle pointer-to-member-functions in C++, or is there something with the boost libraries that I'm missing or is preventing me from performing this operation? I would appreciate any help or opinion. thanks, Alain

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Can't compile boost 1.3.3.1 with stlport 4.6.2
by Hongquan 04 Jul '07

04 Jul '07

Hi Buddy: I down the boost 1.3.3.1 and stlport 4.6.2 and then using the command < bjam.exe -sTOOLS=msvc-stlport -sSTLPORT_4.6.2_PATH=D:\SDK\Stlport\STLport-4.6.2 > to build the boost source ,but some error was threw out in compile process just as: E:\boost_1_33_1\boost/date_time/date_formatting.hpp(64) : fatal error C1001: INT ERNAL COMPILER ERROR (compiler file 'msc1.cpp', line 1794) Please choose the Technical Support command on the Visual C++ Help menu, or open the Technical Support help file for more information I searched the web and find out some clues at microsoft web site http://support.microsoft.com/kb/226110/en-us and Microsoft has comfirmed that this is a bug of vc6 . But I'm thinking if there is any other way to build the boost with stlport . If anyone knows it,please give me a tip! Thank you very much! Hongquan I-ZQ

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