59 lines
1.5 KiB
TypeScript
59 lines
1.5 KiB
TypeScript
//// [chainedCallsWithTypeParameterConstrainedToOtherTypeParameter.ts]
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class Chain<T extends A> {
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constructor(public value: T) { }
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then<S extends T>(cb: (x: T) => S): Chain<S> {
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return null;
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}
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}
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class A {
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x;
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}
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class B extends A {
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y;
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}
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class C extends B {
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z;
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}
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// Ok to go down the chain, but error to try to climb back up
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(new Chain(new A)).then(a => new B).then(b => new C).then(c => new B).then(b => new A);
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//// [chainedCallsWithTypeParameterConstrainedToOtherTypeParameter.js]
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var __extends = (this && this.__extends) || function (d, b) {
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for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
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function __() { this.constructor = d; }
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__.prototype = b.prototype;
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d.prototype = new __();
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};
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var Chain = (function () {
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function Chain(value) {
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this.value = value;
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}
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Chain.prototype.then = function (cb) {
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return null;
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};
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return Chain;
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})();
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var A = (function () {
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function A() {
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}
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return A;
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})();
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var B = (function (_super) {
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__extends(B, _super);
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function B() {
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_super.apply(this, arguments);
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}
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return B;
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})(A);
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var C = (function (_super) {
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__extends(C, _super);
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function C() {
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_super.apply(this, arguments);
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}
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return C;
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})(B);
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// Ok to go down the chain, but error to try to climb back up
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(new Chain(new A)).then(function (a) { return new B; }).then(function (b) { return new C; }).then(function (c) { return new B; }).then(function (b) { return new A; });
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