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//// [spreadObjectOrFalsy.ts]
function f1<T>(a: T & undefined) {
return { ...a }; // Error
}
function f2<T>(a: T | T & undefined) {
return { ...a };
}
function f3<T extends undefined>(a: T) {
return { ...a }; // Error
}
function f4<T extends undefined>(a: object | T) {
return { ...a };
}
function f5<S, T extends undefined>(a: S | T) {
return { ...a };
}
function f6<T extends object | undefined>(a: T) {
return { ...a };
}
// Repro from #46976
function g1<T extends {}, A extends { z: (T | undefined) & T }>(a: A) {
const { z } = a;
return {
...z
};
}
// Repro from #47028
interface DatafulFoo<T> {
data: T;
}
class Foo<T extends string> {
data: T | undefined;
bar() {
if (this.hasData()) {
this.data.toLocaleLowerCase();
}
}
hasData(): this is DatafulFoo<T> {
return true;
}
}
//// [spreadObjectOrFalsy.js]
"use strict";
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
function f1(a) {
return __assign({}, a); // Error
}
function f2(a) {
return __assign({}, a);
}
function f3(a) {
return __assign({}, a); // Error
}
function f4(a) {
return __assign({}, a);
}
function f5(a) {
return __assign({}, a);
}
function f6(a) {
return __assign({}, a);
}
// Repro from #46976
function g1(a) {
var z = a.z;
return __assign({}, z);
}
var Foo = /** @class */ (function () {
function Foo() {
}
Foo.prototype.bar = function () {
if (this.hasData()) {
this.data.toLocaleLowerCase();
}
};
Foo.prototype.hasData = function () {
return true;
};
return Foo;
}());
//// [spreadObjectOrFalsy.d.ts]
declare function f1<T>(a: T & undefined): any;
declare function f2<T>(a: T | T & undefined): T | (T & undefined);
declare function f3<T extends undefined>(a: T): any;
declare function f4<T extends undefined>(a: object | T): {};
declare function f5<S, T extends undefined>(a: S | T): S | T;
declare function f6<T extends object | undefined>(a: T): T;
declare function g1<T extends {}, A extends {
z: (T | undefined) & T;
}>(a: A): T | (undefined & T);
interface DatafulFoo<T> {
data: T;
}
declare class Foo<T extends string> {
data: T | undefined;
bar(): void;
hasData(): this is DatafulFoo<T>;
}
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