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//// [mappedTypes2.ts]
function verifyLibTypes<T, K extends keyof T, U>() {
var x1: Partial<T>;
var x1: { [P in keyof T]?: T[P] };
var x2: Readonly<T>;
var x2: { readonly [P in keyof T]: T[P] };
var x3: Pick<T, K>;
var x3: { [P in K]: T[P] };
var x4: Record<K, U>;
var x4: { [P in K]: U };
}
type Proxy<T> = {
get(): T;
set(value: T): void;
}
type Proxify<T> = {
[P in keyof T]: Proxy<T[P]>;
}
type DeepReadonly<T> = {
readonly [P in keyof T]: DeepReadonly<T[P]>;
};
declare function assign<T>(obj: T, props: Partial<T>): void;
declare function freeze<T>(obj: T): Readonly<T>;
declare function pick<T, K extends keyof T>(obj: T, ...keys: K[]): Pick<T, K>;
declare function mapObject<K extends string, T, U>(obj: Record<K, T>, f: (x: T) => U): Record<K, U>;
declare function proxify<T>(obj: T): Proxify<T>;
interface Point {
x: number;
y: number;
}
interface Shape {
name: string;
width: number;
height: number;
location: Point;
}
interface PartialShape {
name?: string;
width?: number;
height?: number;
location?: Point;
}
interface ReadonlyShape {
readonly name: string;
readonly width: number;
readonly height: number;
readonly location: Point;
}
function f0(s1: Shape, s2: Shape) {
assign(s1, { name: "circle" });
assign(s2, { width: 10, height: 20 });
}
function f1(shape: Shape) {
var frozen: ReadonlyShape;
var frozen: Readonly<Shape>;
var frozen = freeze(shape);
}
function f2(shape: Shape) {
var partial: PartialShape;
var partial: Partial<Shape>;
var partial: Partial<Shape> = {};
}
function f3(shape: Shape) {
const x = pick(shape, "name", "location"); // { name: string, location: Point }
}
function f4() {
const rec = { foo: "hello", bar: "world", baz: "bye" };
const lengths = mapObject(rec, s => s.length); // { foo: number, bar: number, baz: number }
}
function f5(shape: Shape) {
const p = proxify(shape);
let name = p.name.get();
p.width.set(42);
}
function f6(shape: DeepReadonly<Shape>) {
let name = shape.name; // string
let location = shape.location; // DeepReadonly<Point>
let x = location.x; // number
}
//// [mappedTypes2.js]
function verifyLibTypes() {
var x1;
var x1;
var x2;
var x2;
var x3;
var x3;
var x4;
var x4;
}
function f0(s1, s2) {
assign(s1, { name: "circle" });
assign(s2, { width: 10, height: 20 });
}
function f1(shape) {
var frozen;
var frozen;
var frozen = freeze(shape);
}
function f2(shape) {
var partial;
var partial;
var partial = {};
}
function f3(shape) {
var x = pick(shape, "name", "location"); // { name: string, location: Point }
}
function f4() {
var rec = { foo: "hello", bar: "world", baz: "bye" };
var lengths = mapObject(rec, function (s) { return s.length; }); // { foo: number, bar: number, baz: number }
}
function f5(shape) {
var p = proxify(shape);
var name = p.name.get();
p.width.set(42);
}
function f6(shape) {
var name = shape.name; // string
var location = shape.location; // DeepReadonly<Point>
var x = location.x; // number
}
//// [mappedTypes2.d.ts]
declare function verifyLibTypes<T, K extends keyof T, U>(): void;
declare type Proxy<T> = {
get(): T;
set(value: T): void;
};
declare type Proxify<T> = {
[P in keyof T]: Proxy<T[P]>;
};
declare type DeepReadonly<T> = {
readonly [P in keyof T]: DeepReadonly<T[P]>;
};
declare function assign<T>(obj: T, props: Partial<T>): void;
declare function freeze<T>(obj: T): Readonly<T>;
declare function pick<T, K extends keyof T>(obj: T, ...keys: K[]): Pick<T, K>;
declare function mapObject<K extends string, T, U>(obj: Record<K, T>, f: (x: T) => U): Record<K, U>;
declare function proxify<T>(obj: T): Proxify<T>;
interface Point {
x: number;
y: number;
}
interface Shape {
name: string;
width: number;
height: number;
location: Point;
}
interface PartialShape {
name?: string;
width?: number;
height?: number;
location?: Point;
}
interface ReadonlyShape {
readonly name: string;
readonly width: number;
readonly height: number;
readonly location: Point;
}
declare function f0(s1: Shape, s2: Shape): void;
declare function f1(shape: Shape): void;
declare function f2(shape: Shape): void;
declare function f3(shape: Shape): void;
declare function f4(): void;
declare function f5(shape: Shape): void;
declare function f6(shape: DeepReadonly<Shape>): void;
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