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//// [derivedClassTransitivity.ts]
// subclassing is not transitive when you can remove required parameters and add optional parameters
class C {
foo(x: number) { }
}
class D extends C {
foo() { } // ok to drop parameters
}
class E extends D {
foo(x?: string) { } // ok to add optional parameters
}
var c: C;
var d: D;
var e: E;
c = e;
var r = c.foo(1);
var r2 = e.foo('');
//// [derivedClassTransitivity.js]
// subclassing is not transitive when you can remove required parameters and add optional parameters
var __extends = (this && this.__extends) || function (d, b) {
for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var C = (function () {
function C() {
}
C.prototype.foo = function (x) { };
return C;
}());
var D = (function (_super) {
__extends(D, _super);
function D() {
return _super !== null && _super.apply(this, arguments) || this;
}
D.prototype.foo = function () { }; // ok to drop parameters
return D;
}(C));
var E = (function (_super) {
__extends(E, _super);
function E() {
return _super !== null && _super.apply(this, arguments) || this;
}
E.prototype.foo = function (x) { }; // ok to add optional parameters
return E;
}(D));
var c;
var d;
var e;
c = e;
var r = c.foo(1);
var r2 = e.foo('');
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