ecmascript5

import console;
module util {
print: (m){console.log(m);};
};
export class Foo {
use util;
init: (v){this.v = isFinite(v) ? v:0, this;};
print: (m){util.print(m), this;};
class self.Bar {
extends Foo;
'+': (v){isFinite(v) ? v:this.v;};
print: (v){super(this + v);};
};
};
fb = new Foo.Bar();
fb.print(10);