Newbie boost::mem_fn problem

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Mark Snelling

4 Sep 2002 4 Sep '02

5:16 p.m.

Hello, My problem I think is very simple, I just can't seem to find the solution I have an STL list of object pointers and I want to call a member function on each of the pointers in the list usigng the STL for_each algorithm. This would seem easy if the list contained the actual objects rather than pointers to them, but because they are pointers I can't find a way of doing this. class Block { public: void update(int x); }; void main() { list blocks; for_each(blocks.begin(), blocks.end(), *****); // Call update on each item in list } what should I replace the ***** with? Any help appreciated! Mark.

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Jeff Faust

4 Sep 4 Sep

6:22 p.m.

New subject: [Boost-Users] Newbie boost::mem_fn problem

#include ... int updateVal; ... for_each(blocks.begin(), blocks.end(), boost::bind(&Block::update, _1, updateVal)); Jeff -----Original Message----- From: Mark Snelling [mailto:mark@bakedbeans.com] Sent: Wednesday, September 04, 2002 10:17 AM To: Boost-Users@yahoogroups.com Subject: [Boost-Users] Newbie boost::mem_fn problem Hello, My problem I think is very simple, I just can't seem to find the solution I have an STL list of object pointers and I want to call a member function on each of the pointers in the list usigng the STL for_each algorithm. This would seem easy if the list contained the actual objects rather than pointers to them, but because they are pointers I can't find a way of doing this. class Block { public: void update(int x); }; void main() { list blocks; for_each(blocks.begin(), blocks.end(), *****); // Call update on each item in list } what should I replace the ***** with? Any help appreciated! Mark. 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/

Mark Snelling

5 Sep 5 Sep

8:02 a.m.

New subject: [Boost-Users] Newbie boost::mem_fn problem

Thanks Jeff. I really must spend some time getting to grips with the boost::bind library. Are there any sets of documentation for this? I don't find the Boost set of docs on the topic very enlightening. Mark. ----- Original Message ----- From: "Jeff Faust" To: Sent: Wednesday, September 04, 2002 7:22 PM Subject: RE: [Boost-Users] Newbie boost::mem_fn problem

...

#include

...

int updateVal;

...

for_each(blocks.begin(), blocks.end(), boost::bind(&Block::update, _1, updateVal));

Jeff

-----Original Message----- From: Mark Snelling [mailto:mark@bakedbeans.com] Sent: Wednesday, September 04, 2002 10:17 AM To: Boost-Users@yahoogroups.com Subject: [Boost-Users] Newbie boost::mem_fn problem

Hello, My problem I think is very simple, I just can't seem to find the solution I have an STL list of object pointers and I want to call a member function on each of the pointers in the list usigng the STL for_each algorithm. This would seem easy if the list contained the actual objects rather than pointers to them, but because they are pointers I can't find a way of doing this.

class Block { public: void update(int x); };

void main() { list blocks; for_each(blocks.begin(), blocks.end(), *****); // Call update on each item in list }

what should I replace the ***** with?

Any help appreciated!

Mark.

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/

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Jeff Faust

2:25 p.m.

New subject: [Boost-Users] Newbie boost::mem_fn problem

Those docs are the only I've found. Of course, this forum is a perfect place to present your questions. One thing: bind<> is an improvement over std::bind1st and std::bind2nd. The STL methods will probably have more documentation available. Maybe understanding it from that perspective will help. Jeff -----Original Message----- From: Mark Snelling [mailto:mark@bakedbeans.com] Sent: Thursday, September 05, 2002 1:02 AM To: Boost-Users@yahoogroups.com Subject: Re: [Boost-Users] Newbie boost::mem_fn problem Thanks Jeff. I really must spend some time getting to grips with the boost::bind library. Are there any sets of documentation for this? I don't find the Boost set of docs on the topic very enlightening. Mark. ----- Original Message ----- From: "Jeff Faust" To: Sent: Wednesday, September 04, 2002 7:22 PM Subject: RE: [Boost-Users] Newbie boost::mem_fn problem

...

#include

...

int updateVal;

...

for_each(blocks.begin(), blocks.end(), boost::bind(&Block::update, _1, updateVal));

Jeff

-----Original Message----- From: Mark Snelling [mailto:mark@bakedbeans.com] Sent: Wednesday, September 04, 2002 10:17 AM To: Boost-Users@yahoogroups.com Subject: [Boost-Users] Newbie boost::mem_fn problem

Hello, My problem I think is very simple, I just can't seem to find the solution I have an STL list of object pointers and I want to call a member function on each of the pointers in the list usigng the STL for_each algorithm. This would seem easy if the list contained the actual objects rather than pointers to them, but because they are pointers I can't find a way of doing this.

class Block { public: void update(int x); };

void main() { list blocks; for_each(blocks.begin(), blocks.end(), *****); // Call update on each item in list }

what should I replace the ***** with?

Any help appreciated!

Mark.

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/

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/

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