- Boost-users - lists.preview.boost.org

match multiline regular expression
by Winson Yung 25 Jul '06

25 Jul '06

I am trying to match (case insenstive) the following two lines with a single regular expression, but somehow it doesn't work using boot regex: NET INCOME PER COMMON SHARE: Basic .................................................. $ 4.38 $ 3.90 $ 3.37 where: 1) there might be spaces before "NET INCOME PER COMMON SHARE" 2) there might be spaces after "NET INCOME PER COMMON SHARE" 3) the semicolon might be optional ^(\\s*)?Net income per common share:?(\\s*)?\\r\\n( *)?basic Any one has suggestions? /Winson

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version specific "boost-<version>" source header subdirectory
by Noel Yap 25 Jul '06

25 Jul '06

Is there any way _not_ to get the version specific subdirectory? I prefer embedding that information within the --prefix argument. Thanks, Noel

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iterate over key_type of map
by gast128 24 Jul '06

24 Jul '06

Dear all, in our company we use the STL map frequently. However one often wants to iterate over the key_type only (or mapped type, or make desicions for the key type, and take action on its corresponded map type). With the transform_iterator this is possible, but the resulting code is not an improvement over writing the loop explicitly. For example I want to search for the maximum string length: typedef std::map<std::string, double> StringDoubleMap; typedef boost::function<StringDoubleMap::key_type (const StringDoubleMap::value_type&)> Function; typedef boost::transform_iterator<Function, StringDoubleMap::const_iterator> TransformIterator; StringDoubleMap mp = boost::assign::map_list_of("George", 0.0) ("Bill", 0.0) ("Ronald", 0.0) ("Jimmy", 0.0); Function fc = boost::bind(&StringDoubleMap::value_type::first, _1); TransformIterator itBegin(mp.begin(), fc); TransformIterator itEnd(mp.end(), fc); TransformIterator it = std::max_element(itBegin, itEnd, boost::bind (&std::string::length, _1) < boost::bind(&std::string::length, _2)); if (it != itEnd) { std::cout << it->c_str() << ' ' << it->length() << std::endl; } A select1st or select2nd would already a great help. Wkr, me

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Re: [Boost-users] shared_ptr compile error ms vc++ 8
by Andrew McDonald 24 Jul '06

24 Jul '06

you misunderstand....I was answering a prior question posted by bringiton asking how to diagnose the specific source code location of such errors when compiled using vc++ 8... not a question regarding whether or not such code is in error... My posting was an example confirming for bringiton that the error output produced by vc++ 8 specifically also referenced the module/line number that attempted to instantiate the shared_ptr template, rather than just the error location inside the shared_ptr header. Although I am now regretting posting.... ;) regards, Andrew > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org]On Behalf Of > Bronek Kozicki > Sent: Monday, 24 July 2006 6:37 PM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] shared_ptr compile error ms vc++ 8 > > > Andrew McDonald wrote: > > Was an answer to a previous question regarding locating the > source of the error using vc++ 8 > > >>> When compiling the following line in a file example.cpp; > >>> > >>> boost::shared_ptr<int> p(new std::string) > > you would have error from any compiler, because this code is > illformed. There is > no conversion from std::string* to int* . > > > B. > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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How to detect overflow when use lexical_cast??
by 袁晓辉 24 Jul '06

24 Jul '06

Hi,all I want to cast string to long long type and handle overflow. I tested as follow. long long somevar = lexical_cast<long long>("123456789789789798879977978789787987879879787977897897897899879978798798798");//!!!!!!!!!!!!!! But it does not throw an exception!! It seem that casting to int does not have this kind of problem. int somevar2 = lexical_cast<int>("123456789789789798879977978789787987879");//will throw an exception

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Re: [Boost-users] shared_ptr compile error ms vc++ 8
by Andrew McDonald 24 Jul '06

24 Jul '06

Was an answer to a previous question regarding locating the source of the error using vc++ 8 regards, Andrew > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org]On Behalf Of > Mateusz Loskot > Sent: Monday, 24 July 2006 5:02 PM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] shared_ptr compile error ms vc++ 8 > > > Andrew McDonald wrote: > > I am using VC++ 2005 Express Edition v 8.0.050727.42. > > > > When compiling the following line in a file example.cpp; > > > > boost::shared_ptr<int> p(new std::string) > --------------------^^^-------------^^^^^^ > > int type is not a string type, and the other way. > > Best regards > -- > Mateusz Loskot > http://mateusz.loskot.net > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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Re: [Boost-users] shared_ptr compile error ms vc++ 8
by Andrew McDonald 24 Jul '06

24 Jul '06

I am using VC++ 2005 Express Edition v 8.0.050727.42. When compiling the following line in a file example.cpp; boost::shared_ptr<int> p(new std::string) the following error is produced (note the explicit mention of example.cpp(10) ): c:\Projects\boost\shared_ptr.hpp(125) : error C2440: 'initializing' : cannot convert from 'std::string *' to 'int *' Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast .\example.cpp(10) : see reference to function template instantiation 'boost::shared_ptr<T>::shared_ptr<std::string>(Y *)' being compiled with [ T=int, Y=std::string ] regards, Andrew McDonald System Architect Norwood Systems Australia Pty Ltd Level 1, 71 Troy Terrace PO Box 1281 Subiaco, WA 6904 Tel +61 8 9380 7766 Fax +61 8 9380 7733 The information in this email, and any attachments, may contain confidential information and is intended solely for the attention and use of the named addressee (s). It must not be disclosed to any person(s) without authorization. If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are not authorized to, and must not, disclose, copy, distribute, or retain this message or any part of it. If you have received this communication in error, please notify the sender immediately.

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manually calling constructor?
by bringiton bringiton 24 Jul '06

24 Jul '06

Is it possible to manually call the constructor of an object. It is possible to call the destructor (a trick i found from std::vector<T>::pop_back()) I stepped through the std::vector<T>::push_back() to find how they call the constructor for memory that has already been allocated, but I could not follow the code. Test3 t; t.~Test3(); // OK t.Test3(); // compile error

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shared_ptr compile error ms vc++ 8
by bringiton bringiton 24 Jul '06

24 Jul '06

boost::shared_ptr<int> p(new std::string); In MS VC++ 6, the above will throw the following compile error: >>error C2440: 'initializing' : cannot convert from 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > *' to 'int *' The above is not very useful because it catches the error in the shared_ptr.hpp file. However, it is OK because because the compiler also has a reference to my line of code above: >>see reference to function template instantiation '__thiscall boost::shared_ptr<int>::boost::shared_ptr<int>(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > *)' being compiled The above is all good. I however do not get the luxury of the additional reference in MS VC++ 8. Instead I just get the initial reference to shared_ptr.hpp. This makes it extremely difficult to track where the error because I have many pages that use the shared_ptr. - Can anyone suggest how I can get the 2nd reference to my own code in MS VC++ 8. - Am I missing something obvious? - BTW, in vc++ 8 i'm viewing the errors in a list (instead of the text dump). - I may need to look at the text dump to get the 2nd reference but was wondering if there was an easier solution - Sorry, I dont have vc++ 8 in front of me to give you the error

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Re: [Boost-users] serialization on const member and map<const CLASS*, CLASS>
by Cheok Yan Cheng 24 Jul '06

24 Jul '06

Please take note that even the following simplest form won't work. Here is the full source code. Any suggestion? Thank you very much! #include <iostream> #include <sstream> #include <fstream> using namespace std; #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> class dd { private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & i; } int i; }; class dummy { public: dummy() : d(0){} ~dummy(){} private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & const_cast<dd *>(d); } const dd *d; }; int main() { const dummy w; dummy r; // make an archive std::ofstream ofs("dummy"); boost::archive::text_oarchive oa(ofs); oa << w; std::ifstream ifs("dummy"); boost::archive::text_iarchive ia(ifs); ia >> r; } c:\Documents and Settings\yccheok\Desktop\xxx\main.cpp(34): error C2679: binary '&' : no operator found which takes a right-hand operand of type 'dd *' (or there is no acceptable conversion) __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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