[Boost-users] filter_iterator usage

From: Nico Galoppo (nico_at_[hidden])
Date: 2006-02-23 00:47:28

Hi,

I have a class with some custom iterators, I would like to add another custom 
iterator that is a 'filtered' version of the custom iterator. Something like this:

class A
{
public:
   typedef boost::filter_iterator<predicate_type, custom_iterator> 
filtered_iterator;

   filtered_iterator begin()
   {
     predicate_type predicate = boost::bind(...);
     return boost::make_filter_iterator(predicate, custom_begin(), custom_end());
   }
}

Unfortunately, the following code doesn't compile:

A a;
A::filtered_iterator it = a.begin();

Reason: cannot convert from 'boost::filter_iterator<Predicate,Iterator>' to 
'const boost::filter_iterator<Predicate,Iterator>'

I can give more compiler output if needed.

Thanks!

--nico

-- 
nico galoppo von borries     @  address: 105 creel st., chapel hill
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