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

Hi Gonzalo, Gonzalo Brito Gadeschi wrote:

Someone suggested to use boost::size in the other thread, but size does

boost::end(rng) - boost::begin(rng)

which is not the number of elements in the filtered range.

Try boost::distance(rng | filtered(pred)). Size shouldn't even compile, since it requires random access, and a filtered range cannot be random access. HTH, Nate