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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();
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