Allowing Expressions such as (low < value < high)

["Nordlöw" via Digitalmars-d-learn]

On Thursday, 4 September 2014 at 22:37:11 UTC, Ary Borenszweig 
wrote:
>> Correction: foo cannot be pure in this case. But I believe 
>> your example
>> is misguiding in this case. The most common use case for this 
>> is when
>> foo is pure.
>
> No, why?

foo cannot be pure because it does io.