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//// [genericTypeAssertions4.ts]
class A {
foo() { return ""; }
}
class B extends A {
bar() { return 1; }
}
class C extends A {
baz() { return 1; }
}
var a: A;
var b: B;
var c: C;
function foo2<T extends A>(x: T) {
var y = x;
y = a; // error: cannot convert A to T
y = b; // error: cannot convert B to T
y = c; // error: cannot convert C to T
y = <T>a;
y = <T>b; // error: cannot convert B to T
y = <T>c; // error: cannot convert C to T
}
//// [genericTypeAssertions4.js]
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
if (typeof b !== "function" && b !== null)
throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var A = /** @class */ (function () {
function A() {
}
A.prototype.foo = function () { return ""; };
return A;
}());
var B = /** @class */ (function (_super) {
__extends(B, _super);
function B() {
return _super !== null && _super.apply(this, arguments) || this;
}
B.prototype.bar = function () { return 1; };
return B;
}(A));
var C = /** @class */ (function (_super) {
__extends(C, _super);
function C() {
return _super !== null && _super.apply(this, arguments) || this;
}
C.prototype.baz = function () { return 1; };
return C;
}(A));
var a;
var b;
var c;
function foo2(x) {
var y = x;
y = a; // error: cannot convert A to T
y = b; // error: cannot convert B to T
y = c; // error: cannot convert C to T
y = a;
y = b; // error: cannot convert B to T
y = c; // error: cannot convert C to T
}
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