Memory allocation purity

[Walter Bright via Digitalmars-d]

On 5/16/2014 1:54 AM, Araq wrote:
>>
>> Yes, the VRP has been a nice win for D. No other language does it.
>
> I don't know why you keep saying things like that, you don't know all the
> languages out there. Nimrod does it too fwiw...

I having trouble finding it in the spec:

     http://nimrod-lang.org/manual.html

Can you please point me to it?