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thisConditionalOnMethodReturnOfGenericInstance.js
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thisConditionalOnMethodReturnOfGenericInstance.js
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//// [thisConditionalOnMethodReturnOfGenericInstance.ts]
class A<T> {
unmeasurableUsage!: {[K in keyof T]-?: T[K]};
}
class B<T> extends A<T> {
method(): string | (this extends C ? undefined : null) {
return "";
}
}
class C<T = any> extends B<T> {
marker!: string;
}
const x = new C<{}>();
const y = x.method(); // usage flags `method` in `B` as circular and marks `y` as the error-any type
//// [thisConditionalOnMethodReturnOfGenericInstance.js]
"use strict";
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 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;
}
B.prototype.method = function () {
return "";
};
return B;
}(A));
var C = /** @class */ (function (_super) {
__extends(C, _super);
function C() {
return _super !== null && _super.apply(this, arguments) || this;
}
return C;
}(B));
var x = new C();
var y = x.method(); // usage flags `method` in `B` as circular and marks `y` as the error-any type