Multiple alias this is coming.

[IgorStepanov via Digitalmars-d-announce]

On Thursday, 18 September 2014 at 21:29:10 UTC, Nordlöw wrote:
> On Thursday, 18 September 2014 at 11:20:49 UTC, IgorStepanov 
> wrote:
>> I've created pull request, which introduces multiple alias 
>> this.
>> https://github.com/D-Programming-Language/dmd/pull/3998
>> Please see the additional tests and comment it.
>
> Exciting!
>
> What more good things than a better behaving Nullable(T) with T 
> being a polymorphic class will this enable?

Is Nullable!(T) with polymorphic type disallowed now?

This PR also allows to use inherited alias thises:

interface Intable
{
    @property int getInt();
}

class Foo : Intable
{
    int i;

    this (int i)
    {
        this.i = i;
    }

    override @property int getInt()
    {
       return i;
    }
}

auto f = new Foo(42);
int i = f; //i now 42

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