tests/cases/compiler/derivedClasses.ts(1,19): error TS2449: Class 'Color' used before its declaration.


==== tests/cases/compiler/derivedClasses.ts (1 errors) ====
    class Red extends Color {
                      ~~~~~
!!! error TS2449: Class 'Color' used before its declaration.
!!! related TS2728 tests/cases/compiler/derivedClasses.ts:8:7: 'Color' is declared here.
        public shade() { 
        	var getHue = () => { return this.hue(); };
        	return getHue() + " red"; 
        }
    }
    
    class Color {
        public shade() { return "some shade"; }
        public hue() { return "some hue"; }
    }
    
    class Blue extends Color {
        
        public shade() { 
        	var getHue = () => { return this.hue(); };
        	return getHue() + " blue"; 
        }
    }
    
    var r = new Red();
    var b = new Blue();
    
    r.shade();
    r.hue();
    b.shade();
    b.hue();
    
    
    