On Wednesday, 26 February 2014 at 10:36:14 UTC, Per Nordlöw wrote:
Make it possible to defined implicit conversions between
wrapped types in order to, for instance, correctly implement
NotNull for reference types.
I'm pretty sure multiple alias this would do the trick.
interface A {}
interface B {}
class C : A, B {}
class D : C {}
NotNull!D should implicitly cast to NotNull!C AND to D (the
latter gives access to the methods here too so it should be
preferred).
NotNull!C should implicitly cast to C (the first one to try),
NotNull!A, NotNull!B, and NotNull!Object.
Multiple alias this would allow that.
https://d.puremagic.com/issues/show_bug.cgi?id=6083
