Why not?

[Uriel]

Lets consider following code:

class Foo {
   private Foo[] m_SomeData;

   public this(int a, double b, string c) {}

   public Foo append(Foo obj) {
     m_SomeData ~= obj;
     return this;
   }
}

void foo(Foo obj) {}

void main() {
   foo(1, 1.0, "1");

   Foo obj = new Foo();
   obj.append(1, 1.0, "1").append(2, 2.0, "2");
}

Why not to do implicitly cast of these three parameters to new Foo 
object. We know that bar should recieve a Foo object and we have a call 
with parameters which exactly match one of Foo's constructors. It could 
be a nice syntactic sugar though not very hard to implement I think.