I think it is better to pass the value as const reference to Save instead copying it. On 9/13/07, David Klein wrote:

Hughes, James wrote:

...

I have a question for boost:binders out there... In the following scenario..(pseudocode)

Class Fred { typedef std::map MyMap;

MyMap Bert;

Save(MyMap::iterator pos) { ... }

SaveAll() { for_each(Bert.begin(), Bert.end(), bind(&Fred::Save, this, _1); }

};

The code wants to save all the data in the map. The bind, I was hoping, would simply call Save for all items in the map, passing in the iterator as the parameter, but I get a template compile fault on the bind. I've tried all sorts of combinations, checked boost docs, read the chapter in Beyond the C++ standard library, Googled etc, but just cannot figure out what I need to do here.

Any help gratefully received.

James

Hi James,

Class Fred { ...

void // void was missing Save(MyMap::value_type pos) // changed iterator to value_type { ... }

void // void was missing SaveAll() { for_each(Bert.begin(), Bert.end(), bind(&Fred::Save, this, _1); }

};

-- HTH, dave

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-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of David Klein Sent: 13 September 2007 13:49 To: boost-users@lists.boost.org Subject: Re: [Boost-users] [bind] for_each, Member function question.

Ovanes Markarian wrote:

...

I think it is better to pass the value as const reference to Save instead copying it.

Hi Ovanes,

i just wanted to show to use value_type instead of iterator. But you're right, a const ref is probably better :)

-- Regards, dave

Thanks all. I had a feeling I was missing some vital piece of information!! Rgds James This message (including any attachments) contains confidential and/or proprietary information intended only for the addressee. Any unauthorized disclosure, copying, distribution or reliance on the contents of this information is strictly prohibited and may constitute a violation of law. If you are not the intended recipient, please notify the sender immediately by responding to this e-mail, and delete the message from your system. If you have any questions about this e-mail please notify the sender immediately.