Initializing an anonymous class with a trait

Question

Can someone help me understand the following behavior?

Simply put: what is the difference between the following two cases where...

I define a simple class c + trait t

scala> class c {val x=true; val y=this.x}  defined class c  scala> trait t {} defined trait t 

I can instantiate a new "c with t"

scala> new c with t res32: c with t = $anon$1@604f1a67 

But I can't instantiate a new "[anonymous class just like c] with t"

scala> new {val x=true; val y=this.x} with t <console>:9: error: type mismatch;  found   : type  required: ?{def x: ?} <console>:9: error: value x is not a member of object $iw               new {val x=true; val y=this.x} with t 

What's the difference between these two cases?

Thanks!

Answer 1

Is this what you're after:

new t {val x=true; val y=this.x} 

If you have another trait, u {}, you can write new t with u {val x=true; val y=this.x}