DIP69 - Implement scope for escape proof references

[Walter Bright via Digitalmars-d]

On 12/9/2014 8:34 PM, Dicebot wrote:
> But as far as I understand the spec it will result it this code failing too:
>
> auto r = ["aaa", "bbb", "ccc"].map!foo;
> // should compile but will fail because foo returns scope  ref:
> string s = r.front;
>
> What I mean is that in current proposal it is impossible to transfer scope
> information down the call chain - either function always returns scope ref or
> never. Which implies the necessity of something like `auto scope`...

If you want data to 'escape' from r.front, then it shouldn't be marked as scope. 
Definitely, using scope successfully will require some rethinking of how code is 
written.