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//// [genericCallWithObjectTypeArgsAndConstraints3.ts]
// Generic call with constraints infering type parameter from object member properties
class Base {
x: string;
}
class Derived extends Base {
y: string;
}
class Derived2 extends Base {
z: string;
}
function f<T extends Base>(a: { x: T; y: T }) {
var r: T;
return r;
}
var r1 = f({ x: new Derived(), y: new Derived2() }); // error because neither is supertype of the other
function f2<T extends Base, U extends { x: T; y: T }>(a: U) {
var r: T;
return r;
}
var r2 = f2({ x: new Derived(), y: new Derived2() }); // ok
var r3 = f2({ x: new Derived(), y: new Derived2() }); // ok
function f3<T extends Base>(y: (a: T) => T, x: T) {
return y(null);
}
// all ok - second argument is processed before x is fixed
var r4 = f3(x => x, new Base());
var r5 = f3(x => x, new Derived());
var r6 = f3(x => x, null);
//// [genericCallWithObjectTypeArgsAndConstraints3.js]
// Generic call with constraints infering type parameter from object member properties
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 Base = (function () {
function Base() {
}
return Base;
}());
var Derived = (function (_super) {
__extends(Derived, _super);
function Derived() {
return _super !== null && _super.apply(this, arguments) || this;
}
return Derived;
}(Base));
var Derived2 = (function (_super) {
__extends(Derived2, _super);
function Derived2() {
return _super !== null && _super.apply(this, arguments) || this;
}
return Derived2;
}(Base));
function f(a) {
var r;
return r;
}
var r1 = f({ x: new Derived(), y: new Derived2() }); // error because neither is supertype of the other
function f2(a) {
var r;
return r;
}
var r2 = f2({ x: new Derived(), y: new Derived2() }); // ok
var r3 = f2({ x: new Derived(), y: new Derived2() }); // ok
function f3(y, x) {
return y(null);
}
// all ok - second argument is processed before x is fixed
var r4 = f3(function (x) { return x; }, new Base());
var r5 = f3(function (x) { return x; }, new Derived());
var r6 = f3(function (x) { return x; }, null);
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