C interface provides a pointer and a length... wrap without copying?

[cy via Digitalmars-d-learn]

On Saturday, 11 March 2017 at 23:43:54 UTC, Nicholas Wilson wrote:
> A string *is* a pointer length pair, an immutable(char)[].

Yes, but surely there's some silly requirement, like that the 
pointer must only ever point to garbage collected memory, or 
something?

> ubyte[] arr; // or byte/char whatever is the pointed to type 
> returned by giveMeTheMemory
> arr = giveMeTheMemory()[0 .. getMeTheLength()];

...guess not! :D