- Boost-users - lists.boost.org

date_time: << operator for time_duration
by Donato Petrino 16 Jun '05

16 Jun '05

Hello, one short question regarding the 'operator<<' on time_durations (which in turn calls 'duration_put' in time_formatting_streams.hpp): The stream's filler is changed via the manipulator 'std::setfill' to zero ('0'), but without setting it back to the one the stream had when entering to this function (in my case blank (' ')). This results in undesired leading blanks on the subsequent usage of the same stream object. Question: Is it a bug or is it the common way how streams are used (which would mean that is't up to me resetting it to blank again). Thank you in advance! -- Donato Petrino

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Random numbers: problem with uniform_real random distribution
by Dave Steffen 15 Jun '05

15 Jun '05

Hi Folks, I'm getting some very odd results out of the random uniform_real distribution. The distribution uniform_real<> rdouble (-1, 3); returns a sequence of number that looks like 1.28327e+10 2.34686e+09 1.29337e+10 1.25118e+10 1.54783e+10 1.13449e+10 which certainly doesn't meet the requirement of returning values in [-1,3)! I don't see any mention of this on the bug tracker; has anyone else seen this? ---------------------------------------------------------------------- Dave Steffen, Ph.D. "There are two ways to write error-free Software Engineer IV programs; only the third one works." Numerica Corporation ph (970) 419-8343 x27 "Pie are not square. Pie are round. fax (970) 223-6797 Cornbread are square" dgsteffen(a)numerica.us ... anon (usenet)

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Re: [Boost-users] Reference information for mpl::for_each
by Stephen Gross 15 Jun '05

15 Jun '05

>Maybe > template <class Sequence, class T> struct contains_convertible_type : mpl::not_< boost::is_same< typename mpl::find_if< type_sequence , boost::is_convertible<T,_1> >::type , typename mpl::end<Sequence>::type > > {}; Cool--thanks for the info; I'll work on it... Thanks, --Steve

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Boost.mpl suggestion: variation of find_if
by Vyacheslav Kononenko 15 Jun '05

15 Jun '05

Hi, I could not come with usable name for such thing but it could be usable anyway. So it is like find_if but applies a function to an sequence and return first non void type that function returned. So implementation would be trivial: template< typename Sequence, typename Func > struct find_type : fold< Sequence, void_, if_< is_void_< _1 >, Func< _2 >, _1 > {}; If it can be implemented by current set of algorithms please point me out. Regards, Vyacheslav

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fatal error LNK1104: cannot open file 'libboost_regex-vc71-sgd-1_32.lib'
by John Lucas 15 Jun '05

15 Jun '05

Hi boost New to C++ and boost so please bear with me. I have downloaded the boost library (1.3.2) from sf.net on to a Windows XP platform running Visual Studio .NET. I've started a C++ project however when I compile it, having added the regex class, I get the following error: fatal error LNK1104: cannot open file 'libboost_regex-vc71-sgd-1_32.lib' I have include the lib path for boost and that worked OK with the other libraries but not this one. Any one got any ideas? John Lucas Director of Operations MI International UK Tel: +44 (0)1642 356138 Mobile: +44 (0)7884 181828 Email: <mailto:john.lucas@mi-int.com> john.lucas(a)mi-int.com URL: <http://www.mi-int.com/> www.mi-int.com <http://www.mi-int.com/images/logo3.JPG> First for European POI and business data In association with D&B DISCLAIMER: this email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error, please notify the system manager. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of the company. If you are not the intended recipient, please email postmaster(a)mi-int.com, along with a copy of the email. Finally, the recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. E&OE

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Re: [Boost-users] fatal error LNK1104: cannot open file'libboost_regex-vc71-sgd-1_32.lib'
by Marcin Tustin 15 Jun '05

15 Jun '05

The readmes do say, but briefly, get bjam from the boost sourceforge site, and run it in the boost root directory. Alternatively, there may well be project files for use with visual studio available for regex inside the boost distribution. > -----Original Message----- > From: John Lucas [mailto:john.lucas@mi-int.com] > Sent: 14 June 2005 22:43 > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] fatal error LNK1104: cannot open > file'libboost_regex-vc71-sgd-1_32.lib' > > Build the libraries? I understand what that means. How do I do that? > ________________________________ > > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Victor A. Wagner Jr. > Sent: 14 June 2005 21:34 > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] fatal error LNK1104: cannot open > file 'libboost_regex-vc71-sgd-1_32.lib' > > > At 07:37 2005-06-14, John Lucas wrote: > > > Hi boost > > New to C++ and boost so please bear with me. > > I have downloaded the boost library (1.3.2) from sf.net > on to a Windows XP platform running Visual Studio .NET. I've > started a C++ project however when I compile it, having added > the regex class, I get the following error: > > fatal error LNK1104: cannot open file > 'libboost_regex-vc71-sgd-1_32.lib' > > I have include the lib path for boost and that worked > OK with the other libraries but not this one. Any one got any ideas? > > > did you build the boost libraries for your > compiler(apparently VC++7.1)? > > > > > > > > > > John Lucas > Director of Operations > MI International > UK > Tel: +44 (0)1642 356138 > Mobile: +44 (0)7884 181828 > Email: john.lucas(a)mi-int.com <mailto:john.lucas@mi-int.com> > URL: www.mi-int.com <http://www.mi-int.com/> > > > > > > First for European POI and business data > > > > > > In association with D&B > > > > > > DISCLAIMER: this email and any files transmitted with > it are confidential and intended solely for the use of the > individual or entity to whom they are addressed. If you have > received this email in error, please notify the system > manager. Please note that any views or opinions presented in > this email are solely those of the author and do not > necessarily represent those of the company. If you are not > the intended recipient, please email postmaster(a)mi-int.com, > along with a copy of the email. Finally, the recipient should > check this email and any attachments for the presence of > viruses. The company accepts no liability for any damage > caused by any virus transmitted by this email. E&OE > > > > > > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > Victor A. Wagner Jr. http://rudbek.com > <http://rudbek.com/> The five most dangerous words in the > English language: > "There oughta be a law" > >

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Re: [Boost-users] fatal error LNK1104: cannot open file'libboost_regex-vc71-sgd-1_32.lib'
by Marcin Tustin 15 Jun '05

15 Jun '05

This probably means that you haven't compiled the library corresponding to your current setup. If the autolinking not choosing the library compiled with the right settings (i.e. you've decided that you know better than boost what to link to), you could modify the regexp headers to not do autolinking (search for inclusion of autolink.hpp), and configure your project to link against the right lib. > -----Original Message----- > From: John Lucas [mailto:john.lucas@mi-int.com] > Sent: 14 June 2005 15:37 > To: boost-users(a)lists.boost.org > Subject: [Boost-users] fatal error LNK1104: cannot open > file'libboost_regex-vc71-sgd-1_32.lib' > > Hi boost > > New to C++ and boost so please bear with me. > > I have downloaded the boost library (1.3.2) from sf.net on to > a Windows XP platform running Visual Studio .NET. I've > started a C++ project however when I compile it, having added > the regex class, I get the following error: > > fatal error LNK1104: cannot open file > 'libboost_regex-vc71-sgd-1_32.lib' > > I have include the lib path for boost and that worked OK with > the other libraries but not this one. Any one got any ideas? > > > > > > > John Lucas > Director of Operations > MI International > UK > Tel: +44 (0)1642 356138 > Mobile: +44 (0)7884 181828 > Email: john.lucas(a)mi-int.com <mailto:john.lucas@mi-int.com> > URL: www.mi-int.com <http://www.mi-int.com/> > > <http://www.mi-int.com/images/logo3.JPG> > > > > First for European POI and business data > > > In association with D&B > > > DISCLAIMER: this email and any files transmitted with it are > confidential and intended solely for the use of the > individual or entity to whom they are addressed. If you have > received this email in error, please notify the system > manager. Please note that any views or opinions presented in > this email are solely those of the author and do not > necessarily represent those of the company. If you are not > the intended recipient, please email postmaster(a)mi-int.com, > along with a copy of the email. Finally, the recipient should > check this email and any attachments for the presence of > viruses. The company accepts no liability for any damage > caused by any virus transmitted by this email. E&OE > > >

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Re: [Boost-users] How to inherit from boost::multi_array
by Sohail Somani 14 Jun '05

14 Jun '05

-----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Yan Zhang Sent: Tuesday, June 14, 2005 4:07 PM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] How to inherit from boost::multi_array Hi Ron, I finally got it work by using static_cast. But I ran into another problem as you pointed out early that you have to define dimension before you use assignment and copy constructor. That makes the whole thing quit complicated. Any suggestion? Thanks. Yan Revisit inheritance?

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Re: [Boost-users] How to inherit from boost::multi_array
by Yan Zhang 14 Jun '05

14 Jun '05

Hi Ron, I finally got it work by using static_cast. But I ran into another problem as you pointed out early that you have to define dimension before you use assignment and copy constructor. That makes the whole thing quit complicated. Any suggestion? Thanks. Yan _____ From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Ronald Garcia Sent: Tuesday, June 14, 2005 2:28 PM To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] How to inherit from boost::multi_array Use static_cast, rather than const_cast. Cheers, ron On Jun 13, 2005, at 11:14 AM, Yan Zhang wrote: Hi Ron, How do you "cast "other" to the multi_array type" here? I used Array (const Array& other) : boost::multi_array<double,2>( const_cast<const boost::multi_array<double,2>& > other) { } And it failed to compile. Thank for your help, YanI'm read the posting by Thomas and replay by Ronald on how to inherit from boost::multi_array as following: On Oct 2, 2004, at 10:26 AM, Thomas Mensch wrote: Dear List, I am using boost 1.31.0 on Linux (with gcc 3.3.2)I would like to create a 2D array class, which inherits fromboost::multi_array<double, 2> class. However I have problemswith the copy constructor of my class Array. Below is the code,which I am trying to run.

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Reference information for mpl::for_each ?
by Stephen Gross 14 Jun '05

14 Jun '05

(1) Where can I find reference information for mpl::for_each (I've looked around on the boost website and can't seem to find it). (2) Here's what I'm trying to do: I've got an mpl::vector. Given some type T, I want to loop across the vector and see if T is convertible to any of the types in the vector. I tried something like 'for_each<typelist, is_convertible<T, _1> >()' but my syntax is definitely wrong. Any ideas? Thanks in advance, --Steve Stephen Gross Case Western School of Medicine Cleveland, OH "By Grabthar's hammer, by the sons of Worvan, you shall be avenged." - Dr. Lazarus

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