DIP69 - Implement scope for escape proof references

[deadalnix via Digitalmars-d]

On Saturday, 13 December 2014 at 20:45:53 UTC, Walter Bright 
wrote:
> On 12/13/2014 2:10 AM, bearophile wrote:
>> Walter Bright:
>>
>>>>> struct Tree {
>>>>>   RefCount!(Tree*) left;
>>>>>   RefCount!(Tree*) right;
>>>>>   ...
>>>>> }
>>>>
>>>> ... I don't think I'd ever have a use for this code.
>>>
>>> You have no use for tree structures?
>>
>> Giving a reference counter to every pointer in a binary tree 
>> sounds a bit too much.
>
> DMD, for example, uses ASTs where the nodes have multiple 
> parents.

It is a DAG then.