• Enjoys Math (3/3) Jan 30 2016 class A { static B b; } class B {}
• anonymous (9/12) Jan 30 2016 It works when you make b const/immutable:
• Enjoys Math (12/15) Jan 30 2016 More info:
• Chris Wright (6/27) Jan 30 2016 You should use a static constructor:

Enjoys Math <enjoysmath gmail.com> writes:

class A { static B b; } class B {}

doing b = new B() does NOT work.

Nor could I create a this() {} at module level

anonymous <anonymous example.com> writes:

On 30.01.2016 22:52, Enjoys Math wrote:
 class A { static B b; } class B {}

 doing b = new B() does NOT work.

 Nor could I create a this() {} at module level

It works when you make b const/immutable:

class A {static immutable B b = new B;} class B {}

If you want/need b to be mutable, you can use a static constructor 
(`static this`), either in the class or the module:

class A {static B b; static this() {b = new B;}} class B {}
class A {static B b;} static this() {A.b = new B;} class B {}

You could also set it in `main` or another function that runs before b 
is used, of course.

Enjoys Math <enjoysmath gmail.com> writes:

On Saturday, 30 January 2016 at 21:52:20 UTC, Enjoys Math wrote:
 class A { static B b; } class B {}

 doing b = new B() does NOT work.

 Nor could I create a this() {} at module level

More info:

B : A

so I can't do

class A {
   this () {
     if (b is null) {
         b = new B();
     }
}
}

Since it OVERFLOWS THE STACK!!

Chris Wright <dhasenan gmail.com> writes:

On Sat, 30 Jan 2016 22:02:10 +0000, Enjoys Math wrote:

 On Saturday, 30 January 2016 at 21:52:20 UTC, Enjoys Math wrote:
 class A { static B b; } class B {}

 doing b = new B() does NOT work.

 Nor could I create a this() {} at module level

 
 More info:
 
 B : A
 
 so I can't do
 
 class A {
    this () {
      if (b is null) {
          b = new B();
      }
 }
 }

You should use a static constructor:

class A {
  static B b;
  static this() { b = new B(); }
}