Using RefCounted in recursive structures and templates

[ag0aep6g via Digitalmars-d-learn]

Am 10.05.2016 um 21:43 schrieb Lodovico Giaretta:
> import std.typecons: RefCounted;
>
> struct S
> {
>      RefCounted!S s; // error: struct S no size yet for forward reference
> }

This used to work with 2.067. I've filed a phobos regression for this 
very code, and two related dmd issues with different reductions:

https://issues.dlang.org/show_bug.cgi?id=16011 - [REG2.068] recursive 
RefCounted used to work
https://issues.dlang.org/show_bug.cgi?id=16012 - [REG2.070] forward 
reference with alias this
https://issues.dlang.org/show_bug.cgi?id=16013 - [REG2.072a] ICE with 
mutually dependent structs and alias this