[boost] [iterators] Missing typedefs in v1.57

Subject: [boost] [iterators] Missing typedefs in v1.57
From: news.gmane.org (boost57_at_[hidden])
Date: 2014-12-09 05:43:11

I posted this a week ago in the user mailing list but it went unnoticed. 
Perhaps this developers' list is a better place to post it.

The typedefs for difference_type and reference used to be in scope for 
classes derived from iterator_facade.  Since v1.57 they have to be declared 
thus:

typedef typename iterator_facade_::difference_type    difference_type;
typedef typename iterator_facade_::reference        reference;

This seems out of place for a class that was designed to reduce boiler plate 
code.  However, if the change was intentional, please document it.

Thanks,
Keith MacDonald