Re: Allowing Expressions such as (low < value < high)

[Nordlöw]

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.