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