- Boost-users - lists.boost.org

uBLAS and fast matrix multiplication
by klapshin <klapshin＠yahoo.com> 12 Dec '02

12 Dec '02

Hello, I am considering switching from in-house matrix implementation to uBLAS. Overall impression from uBLAS is quite good, but it seems that uBLAS does not take advantage of fast matrix multiplication algorithms such as Strassen or Vinograd. Is that correct? If yes, are there plans to implement such algorithms? Best regards, Kirill Lapshin.

3 3

Re: [Boost-Users] testing if shared_ptr has been assigned
by dick.bridges＠tais.com 12 Dec '02

12 Dec '02

I should point out that I went 'back' to get() because I got tired of explaining the 'correct' way [ie, if( b ) ] Darin Adler provided in his answer. |---------+----------------------------------------------------> | | Dick | | | Bridges/CSE/IRV/CONTRACTOR/TOSHIBA-TAIS@T| | | OSHIBA-TAIS | | | | | | 12/12/2002 08:07 AM | | | Please respond to Boost-Users | | | | |---------+----------------------------------------------------> >----------------------------------------------------------------------------------------------| | | | To: Boost-Users(a)yahoogroups.com | | cc: | | Subject: Re: [Boost-Users] testing if shared_ptr has been assigned | >----------------------------------------------------------------------------------------------| >From the docs: <snippet> get T * get() const; // never throws Returns: the stored pointer. Throws: nothing. </snippet> Therefore you can use if( b.get() ) or if( b.get() == NULL ) "TEA Hartmann, Steven" To: boost-users(a)yahoogroups.com <SHartmann(a)aus.t cc: elusa.com> Subject: [Boost-Users] testing if shared_ptr has been assigned 12/11/2002 11:01 AM Please respond to Boost-Users I need some help in testing for the condition of whether a shared_ptr has been assigned. In the following example, the "if( b != NULL ) does not work. How would I do this test? typedef boost::shared_ptr<int> IPtr; int i( 0 ); IPtr a( i ); IPtr b; if( some condition ) b = a; if( b != NULL ) { // How should this really be coded? } Best Regards, Steve [Non-text portions of this message have been removed] Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

1 0

RE: [Boost-Users] Test Library: Program Execution Monitor output
by Tom Matelich 12 Dec '02

12 Dec '02

> I don't really need this "no errors detected" message. Looking into > code I found a way to turn it off -- I have to define an environment > variable. > I have a way to control this behavior. This is good. Bad news though > that the way to control is quite an awkward one. I would like to > have some internal control, probably overwritable via environment > variable. In case you hadn't though of this workaround: if(getenv("VAR") == 0) putenv("VAR=defaultvalue"); Not to say a programmatic method is not worthwhile. ----------------------------------------------------------------------- DISCLAIMER: Information contained in this message and/or attachment(s) may contain confidential information of Zetec, Inc. If you have received this transmission in error, please notify the sender by return email. -----------------------------------------------------------------------

2 1

RE: [Boost-Users] testing if shared_ptr has been assigned
by TEA Hartmann, Steven 12 Dec '02

12 Dec '02

Thanks all. That works beautifully. -----Original Message----- From: Tom Matelich [mailto:tmatelich@zetec.com] Sent: Thursday, December 12, 2002 12:25 AM To: 'Boost-Users(a)yahoogroups.com' Subject: RE: [Boost-Users] testing if shared_ptr has been assigned if(b) should do it. shared_ptr has an implicit conversion to bool (sort of). > -----Original Message----- > From: TEA Hartmann, Steven [mailto:SHartmann@aus.telusa.com] > Sent: Wednesday, December 11, 2002 11:02 AM > To: boost-users(a)yahoogroups.com > Subject: [Boost-Users] testing if shared_ptr has been assigned > > > I need some help in testing for the condition of whether a > shared_ptr has > been assigned. In the following example, the "if( b != NULL > ) does not > work. How would I do this test? > > typedef boost::shared_ptr<int> IPtr; > > int i( 0 ); > IPtr a( i ); > IPtr b; > > if( some condition ) > b = a; > > if( b != NULL ) { // How should this really be coded? > } > > > Best Regards, > > Steve > > > [Non-text portions of this message have been removed] > > > ------------------------ Yahoo! Groups Sponsor > ---------------------~--> > Get 128 Bit SSL Encryption! > http://us.click.yahoo.com/CBxunD/vN2EAA/xGHJAA/EbFolB/TM > -------------------------------------------------------------- > -------~-> > > Info: <http://www.boost.org> > Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> > Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> > > > Your use of Yahoo! Groups is subject to > http://docs.yahoo.com/info/terms/ > > ----------------------------------------------------------------------- DISCLAIMER: Information contained in this message and/or attachment(s) may contain confidential information of Zetec, Inc. If you have received this transmission in error, please notify the sender by return email. ----------------------------------------------------------------------- Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ [Non-text portions of this message have been removed]

1 0

Re: [Boost-Users] testing if shared_ptr has been assigned
by dick.bridges＠tais.com 12 Dec '02

12 Dec '02

>From the docs: <snippet> get T * get() const; // never throws Returns: the stored pointer. Throws: nothing. </snippet> Therefore you can use if( b.get() ) or if( b.get() == NULL ) "TEA Hartmann, Steven" To: boost-users(a)yahoogroups.com <SHartmann(a)aus.t cc: elusa.com> Subject: [Boost-Users] testing if shared_ptr has been assigned 12/11/2002 11:01 AM Please respond to Boost-Users I need some help in testing for the condition of whether a shared_ptr has been assigned. In the following example, the "if( b != NULL ) does not work. How would I do this test? typedef boost::shared_ptr<int> IPtr; int i( 0 ); IPtr a( i ); IPtr b; if( some condition ) b = a; if( b != NULL ) { // How should this really be coded? } Best Regards, Steve [Non-text portions of this message have been removed] Info: <http://www.boost.org> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

1 0

RE: [Boost-Users] testing if shared_ptr has been assigned
by Tom Matelich 12 Dec '02

12 Dec '02

if(b) should do it. shared_ptr has an implicit conversion to bool (sort of). > -----Original Message----- > From: TEA Hartmann, Steven [mailto:SHartmann@aus.telusa.com] > Sent: Wednesday, December 11, 2002 11:02 AM > To: boost-users(a)yahoogroups.com > Subject: [Boost-Users] testing if shared_ptr has been assigned > > > I need some help in testing for the condition of whether a > shared_ptr has > been assigned. In the following example, the "if( b != NULL > ) does not > work. How would I do this test? > > typedef boost::shared_ptr<int> IPtr; > > int i( 0 ); > IPtr a( i ); > IPtr b; > > if( some condition ) > b = a; > > if( b != NULL ) { // How should this really be coded? > } > > > Best Regards, > > Steve > > > [Non-text portions of this message have been removed] > > > ------------------------ Yahoo! Groups Sponsor > ---------------------~--> > Get 128 Bit SSL Encryption! > http://us.click.yahoo.com/CBxunD/vN2EAA/xGHJAA/EbFolB/TM > -------------------------------------------------------------- > -------~-> > > Info: <http://www.boost.org> > Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> > Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> > > > Your use of Yahoo! Groups is subject to > http://docs.yahoo.com/info/terms/ > > ----------------------------------------------------------------------- DISCLAIMER: Information contained in this message and/or attachment(s) may contain confidential information of Zetec, Inc. If you have received this transmission in error, please notify the sender by return email. -----------------------------------------------------------------------

1 0

Re: Please post Boost.Python questions to Python's c++-sig
by William Trenker <wtrenker＠hotmail.com> 11 Dec '02

11 Dec '02

David, Thanks for this clarification. I was checking out the c++-sig group yesterday and was wondering what that list's relationship was to the official boost list. Now I know why some of my Pythonic questions here were getting blank stares. Cheers, Bill > William, please post Boost.Python questions here: > http://mail.python.org/mailman/listinfo/c++-sig > > Thanks, > -- > David Abrahams

1 0

Python: Wrapping #define's and enum's
by William Trenker <wtrenker＠hotmail.com> 11 Dec '02

11 Dec '02

Many C/C++ libraries contain one or more .h/.hpp files that define various constants used by that library's API. What is the prescribed method for wrapping #defines that are used to represent constants? Also, how do I wrap anonymous enums? For example, I have a project with an Enumerations.h file containing: #define MSG_A 23 #define MSG_B 25 enum {Red, White, Blue = 40 }; What would the boost wrapper code for the above look like? Thanks, Bill

3 2

RE: [Boost-Users] .cvsignore - I'm stuck
by Tom Matelich 11 Dec '02

11 Dec '02

This won't help with an initial checkout, but you could write a small script like: #this is to be run in the base directory #update just the files in boost, don't recurse cvs up -l #now update the subdirectories you care about cvs up boost cvs up libs Obviously, you'll need to put your own options in there. If you need help making a real script or batch file, let me know. > -----Original Message----- > From: William Trenker <wtrenker(a)hotmail.com> > [mailto:wtrenker@hotmail.com] > Sent: Tuesday, December 10, 2002 1:56 PM > To: Boost-Users(a)yahoogroups.com > Subject: [Boost-Users] .cvsignore - I'm stuck > > > (This isn't really a boost question but I've spent half a day reading > the cvs documentation and am hoping for a bit of help on what I think > is probably a very simple question.) > > I have a blazing 33.6K modem connection to the Internet. So when I > do a cvs update of my copy of the boost tree, the mug shots (.jpg > files) in the people subdirectory take quite a long time to be > checked for differences. I don't really need to update those files > so I am trying to get a .cvsignore file to work in the "people" > subdirectory. (I realize these files may not change very often; > still, I would appreciate knowing how to do a .cvsignore for boost > libraries that I'm not using.) But I can't get cvs to recognize the > .cvsignore file. > > I created a .cvsignore file, with the line "*.jpg", in the people > sub-directory. But when I run "cvs update" in the people > sub-directory (after "cvs login") cvs gives me a "? .cvsignore" > response and continues updating anyway. I thought maybe I have to > "cvs add" the .cvsignore file, but that doesn't work. > > How do I get cvs to "see" my .cvsignore file? > > Thanks, > Bill > > > > ------------------------ Yahoo! Groups Sponsor > ---------------------~--> > Get 128 Bit SSL Encryption! > http://us.click.yahoo.com/CBxunD/vN2EAA/xGHJAA/EbFolB/TM > -------------------------------------------------------------- > -------~-> > > Info: <http://www.boost.org> > Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> > Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> > > > Your use of Yahoo! Groups is subject to > http://docs.yahoo.com/info/terms/ > > ----------------------------------------------------------------------- DISCLAIMER: Information contained in this message and/or attachment(s) may contain confidential information of Zetec, Inc. If you have received this transmission in error, please notify the sender by return email. -----------------------------------------------------------------------

1 0

.cvsignore - I'm stuck
by William Trenker <wtrenker＠hotmail.com> 11 Dec '02

11 Dec '02

(This isn't really a boost question but I've spent half a day reading the cvs documentation and am hoping for a bit of help on what I think is probably a very simple question.) I have a blazing 33.6K modem connection to the Internet. So when I do a cvs update of my copy of the boost tree, the mug shots (.jpg files) in the people subdirectory take quite a long time to be checked for differences. I don't really need to update those files so I am trying to get a .cvsignore file to work in the "people" subdirectory. (I realize these files may not change very often; still, I would appreciate knowing how to do a .cvsignore for boost libraries that I'm not using.) But I can't get cvs to recognize the .cvsignore file. I created a .cvsignore file, with the line "*.jpg", in the people sub-directory. But when I run "cvs update" in the people sub-directory (after "cvs login") cvs gives me a "? .cvsignore" response and continues updating anyway. I thought maybe I have to "cvs add" the .cvsignore file, but that doesn't work. How do I get cvs to "see" my .cvsignore file? Thanks, Bill

6 5