- Boost-users - lists.boost.org

[program-options] windows/dos_style
by Andy 29 Mar '06

29 Mar '06

I am just starting to create a program on windows with command line options. I want it act like most dos based programs do. I have been looking at the enum style_t in cmdline.hpp. It provides a unix_style but there is no dos_style or windows_style. What would a dos_style/windows_style look like? Thanks, Andy

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[date_time] local_time compiler issue
by Prasad Ramanan 29 Mar '06

29 Mar '06

Hi, I get a compiler error when trying to compile the following simple program that includes the boost local_time header file: #include <iostream> #include <fstream> #include <string> #include "boost/date_time/local_time/local_time.hpp" using namespace std; void main() {} The error is: 'syntax error: '<' in the file boost\date_time\tz_db_base.hpp at the following line: 'typedef time_zone_names<charT> time_zone_names;' (this is line 149 of this file) I am using boost version 1.32, and I am using the c++ compiler from Microsoft Visual C++ .NET Version 7.1.3088. Does anyone know what is going on here? I have used boost::gregorian and boost::posix_time before successfully. Thanks for your help, Prasad

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Dynamically creating classed by name?
by Rob Caldecott 29 Mar '06

29 Mar '06

Is there any way that, using Boost, you can dynamically create classes by name, similar to the MFC RUNTIME_CLASS macros? I was hoping that the boost::serialize libs might be able to help with this. For example, I want to be able to do something like: CMyClass* pClass = CREATE_CLASS_BY_NAME("CMyClass"); Can Boost help me to achieve this?

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helppppppppp me please
by Karim Bakir 29 Mar '06

29 Mar '06

Hi, I develop in VC++, I use boost library, I have a problem , I use Multi array It runs very well however I can't to include a boost array as a parameter in a function , the compilation is Ok but at the execution it does nothing. Too I can't declare a private member as boost multi array. With boost I can only return a boost multi array , that is OK . Declare member variabla as a boost multiarray it said extents unexpected for example: class Myclass { public : void maFonction(boost::multi_array<double, 2> res); private : int dim1; int dim2; typedef boost::multi_array<double, 2> boostResultatNearby(boost::extents[dim1][dim2][dim3]) } Can you help me please thanks --------------------------------- Nouveau : téléphonez moins cher avec Yahoo! Messenger ! Découvez les tarifs exceptionnels pour appeler la France et l'international.Téléchargez la version beta.

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[Numeric Conversion] numeric_cast and UDTs
by Scott Meyers 29 Mar '06

29 Mar '06

From a cursory look through the library doc, it appears that it's possible to create a UDT such that numeric_cast will work with it. For example, class int24 { ... }; // for 24-bit ints; must also specialize // std::numeric_limits, create a range // checking policy, etc. int i; ... int24 myInt = numeric_cast<int24>(i); // throws if i's value won't // fit in an int24 short s = numeric_cast<short>(myInt); // throws if myInt's value won't // fit in a short Can somebody who knows this library please tell me if my understanding is correct -- that numeric_cast can be made to work with integral UDTs? Thanks, Scott

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Building boost using the VS2005 ARM cross-compiler?
by Alex Korban 29 Mar '06

29 Mar '06

Hi Has anyone attempted to build boost using the VS2005 ARM cross-compiler? Are all the necessary libraries available in this version of Visual Studio (I know they weren't in EVC4)? How would I go about actually building boost? My understanding is that I need to modify the jam files to use the cross-compiler. Perhaps somebody has already done it? Any help would be greatly appreciated. -- Best regards Alex Korban.

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Re: [Boost-users] [tuples] make_tuple_over a type-sequence
by EMalenfant＠interstarinc.com 29 Mar '06

29 Mar '06

From: Yuval Ronen [mailto:ronen_yuval@yahoo.com] > > Is there a meta-function that creates a tuple type which > contains the types contained in a type-sequence? (I'm talking > about a similar thing to variant's make_variant_over). > We use a generator like this: template<typename Typelist> struct TupleGen : boost::mpl::reverse_fold< Typelist, boost::tuples::null_type, boost::tuples::cons<boost::mpl::_2, boost::mpl::_1> > { };

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[tuples] make_tuple_over a type-sequence
by Yuval Ronen 29 Mar '06

29 Mar '06

Is there a meta-function that creates a tuple type which contains the types contained in a type-sequence? (I'm talking about a similar thing to variant's make_variant_over).

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Re: [Boost-users] Dynamically creating classed by name?
by David Klein 29 Mar '06

29 Mar '06

boost-users-bounces(a)lists.boost.org wrote: > boost-users-bounces(a)lists.boost.org wrote: >> Is there any way that, using Boost, you can dynamically create >> classes by name, similar to the MFC RUNTIME_CLASS macros? I was >> hoping that the boost::serialize libs might be able to help with >> this. >> >> For example, I want to be able to do something like: >> >> CMyClass* pClass = CREATE_CLASS_BY_NAME("CMyClass"); >> >> Can Boost help me to achieve this? >> >> >> >> _______________________________________________ >> Boost-users mailing list >> Boost-users(a)lists.boost.org >> http://lists.boost.org/mailman/listinfo.cgi/boost-users > > hi rob, > > i guess you're looking for some kind of reflection library. > there is none so far in boost, but there were some proposals in the > past. > > see: http://lists.boost.org/Archives/boost/2006/01/99686.php > > HTH dave > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users oh well, i just read about MFC's RUNTIME_CLASS and it seems more like a factory than a whole reflection library. there used to be an implementation of a generic factory class in the old boost vault on sourceforge. but i couldn't find it in the new one. maybe someone can upload it again? sorry for the noise before.

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Re: [Boost-users] Dynamically creating classed by name?
by David Klein 29 Mar '06

29 Mar '06

boost-users-bounces(a)lists.boost.org wrote: > Is there any way that, using Boost, you can dynamically create > classes by name, similar to the MFC RUNTIME_CLASS macros? I was > hoping that the boost::serialize libs might be able to help with this. > > For example, I want to be able to do something like: > > CMyClass* pClass = CREATE_CLASS_BY_NAME("CMyClass"); > > Can Boost help me to achieve this? > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users hi rob, i guess you're looking for some kind of reflection library. there is none so far in boost, but there were some proposals in the past. see: http://lists.boost.org/Archives/boost/2006/01/99686.php HTH dave

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