Re: [Boost-users] using pairs with boost.foreach

Subject: Re: [Boost-users] using pairs with boost.foreach
From: Eric Niebler (eric_at_[hidden])
Date: 2009-10-22 09:17:30

Sean Farrow wrote:
> Hi:
> 
> Is it possible to use an std::pair with boost.foreach?
> 
> I’m getting all sorts of errors when trying to do this.
> 
> Any help appreciated.

Do you mean using a std::pair of iterators to designate the range? That 
should work. Or are you doing something like this:

   BOOST_FOREACH( std::pair<X,Y> x, a_map ) // OOPS

The above won't work because the extra comma makes it look like you're 
trying to pass 3 arguments to the BOOST_FOREACH macro. Try this:

   typedef std::pair<X,Y> value_type;
   BOOST_FOREACH( value_type x, a_map )

HTH,

-- 
Eric Niebler
BoostPro Computing
http://www.boostpro.com