Thorsten Ottosen skrev:

Also, I don't see any reason why a const T& overload of boost::fill cannot exists as long as the const-iterator is actually a mutable iterator (like with iterator_range<MutableRange>).

Also note that in a world with perfect forwarding, we shuold probably specify fill() like

 template< class Rng >
 void fill( Rng&& rng, range_value<Rng>::type x );

-Thorsten