[Boost-users] Re: FOREACH with maps

From: Eric Niebler (eric_at_[hidden])
Date: 2005-05-11 02:34:14

Dave Steffen wrote:
> If anyone's interested: I'm playing with the idea of extending FOREACH
> in a way so that, instead of having a pair<>, you've got two separate
> variables for key and value.  Maybe something like:
> 
> map<int,int> m;
> ...
> FOREACH_PAIR(int key, int value, m)
> { ... }
> 
> I'm having a very moderate amount of success.  Anyone else playing
> with this sort of thing?
> 

Can't find the reference now, but someone suggested using tie() from the 
tuples library for this:

int key, int value;
BOOST_FOREACH(boost::tie(key, value), m)
{ ... }

HTH,

-- 
Eric Niebler
Boost Consulting
www.boost-consulting.com