always false
do nothing
import std.algorithm : map; class NormalRNG : DistributionRNG!double { double front() @property { return rNormal(); } } import std.range; auto rng = new NormalRNG; auto sigma = 4.0; auto mu = 2.0; auto sample = rng.map!(x => x * sigma + mu).take(9).array;
Interface for infinity input range of random numbers.