More tricky range semantics

[Joseph Rushton Wakeling via Digitalmars-d]

On Friday, 16 January 2015 at 17:13:33 UTC, Joseph Rushton 
Wakeling wrote:
> I think you've misunderstood what I was getting at, probably 
> because I didn't explain myself well.

There's a concrete example of the problem I can demonstrate from 
some Phobos functionality, but off the top of my head I can't 
remember what it is.  I'll try and look it up when I get home 
later this evening.

The essence is that, as a caller, I have this problem:

     auto range = SomeReferenceTypeForwardRange(whatever);

     foo(range); // prints one set of 10 values

     foo(range); // should print different set of 10 values
                 // but won't because foo()'s implementation
                 // doesn't take into account possibility of
                 // reference type input