how to do iota(0,256) with ubytes ?

and more generally:

iota with 'end' parameter set to max range of a type.

of course this doesn't work:

auto b=iota(ubyte(0), ubyte(256));

//cannot implicitly convert expression (256) of type int to ubyte

Could we have a function with iota_inclusive that has inclusive bounds for 'end' parameter ?