Constructor Inheritance

[Meta via Digitalmars-d-learn]

It's been so long since I've had to use OOP in D that I'm 
starting to forget things like this. If I have the parent class A 
which defines a constructor:

class A
{
     string val;

     this(string val) { this.val = val; }
}

And a child class B which inherits from A:

class B: A
{
}

I get the the following error:

Error: class B cannot implicitly generate a default ctor when 
base class A is missing a default ctor

Is there a simpler way to do this without having to define a 
constructor in B that just forwards to A's constructor, like so?

class B: A
{
     this(string val) { super(val); }
}

Is it allowed to do something like `alias __ctor = super.__ctor`?