how to do iota(0,256) with ubytes ? (cf need for iotaInclusive)

[Ali Çehreli via Digitalmars-d]

On 10/08/2015 07:43 PM, Timothee Cour via Digitalmars-d wrote:
> also, workarounds involving:
> iota(0,256).map!(a=>cast(ubyte)a)
> are neither pleasant nor efficient
>
>
> On Thu, Oct 8, 2015 at 7:41 PM, Timothee Cour <thelastmammoth at gmail.com>
> wrote:
>
>> 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 ?
>>
>>
>

 From an email to a friend earlier this year, without caring much about 
performance implications: :)

auto inclusive_iota(T)(T beg, T end)
{
     /* Chain the elements of 'iota' (which is end-exclusive)
      * and a range containing just the end element
      * 'only'. This returns a lazy range. */
     return chain(iota(beg, end), only(end));
}

Ali