Re: [boost] [range] Best way to count the elements in a filtered range?

I'm not quite sure I'm understanding the question! Does boost::count( filtered_range ); not do exactly what you want?

boost::count takes a value (just like the STL), there is no version of boost::count that simply takes a range. Also, I don't understand why you'd like am rvalue ref version of count when

the argument is const

E.g. boost::cout( range | filter ); would bind to an rvalue.