Re: [Boost-users] dereference problems with iterator_facade

From: e r (erwann.rogard_at_[hidden])
Date: 2008-08-22 23:37:24

David Abrahams wrote:
> on Tue Aug 19 2008, e r <erwann.rogard-AT-gmail.com> wrote:
> 
>> hello,
>>
>> i have a build error when i try to use an iterator derived from
>> iterator_facade<Iter> with Iter an iterator over a const Range. It's the
>> const that causes the error. See the *.hpp below and an example.
> 
> The problem is that the reference type of Iter is value_type& when it
> should be value_type const&.  The value_type of a constant iterator is
> still non-const, and you're getting the Value parameter by asking the
> value_type of BaseIter.
> 
>> any other suggestion to improve the *hpp also appreciated.
> 
> Use iterator_adaptor; all your problems will go away and your code will
> get smaller.
> 

Indeed, it worked. Thanks^2!