10 lines
177 B
JavaScript
10 lines
177 B
JavaScript
|
class A {
|
||
|
|
foo(): A { return this; }
|
||
|
|
}
|
||
|
|
class B extends A {
|
||
|
|
foo(): B { return this; }
|
||
|
|
}
|
||
|
|
class C extends A {}
|
||
|
|
var a: A = new B();
|
||
|
|
a.foo = function(): C { return new C(); }
|