jerro:
Couldn't it just be iota with no parameters?
The Count range has a helper count() function similar to this, that's meant to have an argument that defaults to zero:
Count!T count(T)(T start=0) if (isIntegral!T) { return Count!T(start); }
The argument allows it to start from another starting point, and it allows you to specify the type of the numbers it yields, while in iota() without arguments it's less easy to specify the type of the numbers it yields.
Count(5) is easy to replace with iota(5, int.max), but count(BigInt(0)) is less easy to replace with iota, because it doesn't give you a way to denote a right-open BigInt interval. And using iota(BigInt(0), BigInt(ulong.max)) is not that good. Currently using BigInt in iota seems to not even being supported...
Bye, bearophile
