More tricky range semantics

[Dicebot via Digitalmars-d]

On Friday, 16 January 2015 at 14:58:09 UTC, Dicebot wrote:
> On Friday, 16 January 2015 at 00:58:34 UTC, Joseph Rushton 
> Wakeling via Digitalmars-d wrote:
>> On 16/01/15 00:24, Andrei Alexandrescu via Digitalmars-d wrote:
>>> That's right. To simplify the problem space we might decree 
>>> that forward (or
>>> better) ranges with reference semantics are not allowed. -- 
>>> Andrei
>>
>> That would seem to place significant restrictions on the 
>> ability to define effective random number generators and 
>> related functionality ... ?
>
> Why RNG would be a forward range as opposed to just input range?

To specify : the way I see it you either want PRNG to be a 
forward range and that fits with value semantics. Or you want 
reference semantics and it naturally becomes input range.