stream == range ? [Sliding window]

[Andrei Alexandrescu via Digitalmars-d]

On 5/31/15 10:50 AM, Dmitry Olshansky wrote:
> 1. There must be a way to look at underlying buffer w/o copying anything.

bulkRead would be useful for unbuffered streams. The input range 
interface requires a 1-element (at least) buffer. Buffered ranges would 
indeed need more optional primitives. -- Andrei