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//// [strictPropertyInitialization.ts]
// Properties with non-undefined types require initialization
class C1 {
a: number; // Error
b: number | undefined;
c: number | null; // Error
d?: number;
#f: number; //Error
#g: number | undefined;
#h: number | null; //Error
#i?: number;
}
// No strict initialization checks in ambient contexts
declare class C2 {
a: number;
b: number | undefined;
c: number | null;
d?: number;
#f: number;
#g: number | undefined;
#h: number | null;
#i?: number;
}
// No strict initialization checks for static members
class C3 {
static a: number;
static b: number | undefined;
static c: number | null;
static d?: number;
}
// Initializer satisfies strict initialization check
class C4 {
a = 0;
b: number = 0;
c: string = "abc";
#d = 0
#e: number = 0
#f: string= "abc"
}
// Assignment in constructor satisfies strict initialization check
class C5 {
a: number;
#b: number;
constructor() {
this.a = 0;
this.#b = 0;
}
}
// All code paths must contain assignment
class C6 {
a: number; // Error
#b: number
constructor(cond: boolean) {
if (cond) {
return;
}
this.a = 0;
this.#b = 0;
}
}
class C7 {
a: number;
#b: number;
constructor(cond: boolean) {
if (cond) {
this.a = 1;
this.#b = 1;
return;
}
this.a = 0;
this.#b = 1;
}
}
// Properties with string literal names aren't checked
class C8 {
a: number; // Error
"b": number;
0: number;
}
// No strict initialization checks for abstract members
abstract class C9 {
abstract a: number;
abstract b: number | undefined;
abstract c: number | null;
abstract d?: number;
}
// Properties with non-undefined types must be assigned before they can be accessed
// within their constructor
class C10 {
a: number;
b: number;
c?: number;
#d: number;
constructor() {
let x = this.a; // Error
this.a = this.b; // Error
this.b = this.#d //Error
this.b = x;
this.#d = x;
let y = this.c;
}
}
// Property is considered initialized by type any even though value could be undefined
declare function someValue(): any;
class C11 {
a: number;
#b: number;
constructor() {
this.a = someValue();
this.#b = someValue();
}
}
const a = 'a';
const b = Symbol();
class C12 {
[a]: number;
[b]: number;
['c']: number;
constructor() {
this[a] = 1;
this[b] = 1;
this['c'] = 1;
}
}
enum E {
A = "A",
B = "B"
}
class C13 {
[E.A]: number;
constructor() {
this[E.A] = 1;
}
}
//// [strictPropertyInitialization.js]
"use strict";
// Properties with non-undefined types require initialization
var __classPrivateFieldSet = (this && this.__classPrivateFieldSet) || function (receiver, state, value, kind, f) {
if (kind === "m") throw new TypeError("Private method is not writable");
if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot write private member to an object whose class did not declare it");
return (kind === "a" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;
};
var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
return kind === "m" ? f : kind === "a" ? f.call(receiver) : f ? f.value : state.get(receiver);
};
var _C1_f, _C1_g, _C1_h, _C1_i, _C4_d, _C4_e, _C4_f, _C5_b, _C6_b, _C7_b, _C10_d, _C11_b;
class C1 {
constructor() {
_C1_f.set(this, void 0); //Error
_C1_g.set(this, void 0);
_C1_h.set(this, void 0); //Error
_C1_i.set(this, void 0);
}
}
_C1_f = new WeakMap(), _C1_g = new WeakMap(), _C1_h = new WeakMap(), _C1_i = new WeakMap();
// No strict initialization checks for static members
class C3 {
}
// Initializer satisfies strict initialization check
class C4 {
constructor() {
this.a = 0;
this.b = 0;
this.c = "abc";
_C4_d.set(this, 0);
_C4_e.set(this, 0);
_C4_f.set(this, "abc");
}
}
_C4_d = new WeakMap(), _C4_e = new WeakMap(), _C4_f = new WeakMap();
// Assignment in constructor satisfies strict initialization check
class C5 {
constructor() {
_C5_b.set(this, void 0);
this.a = 0;
__classPrivateFieldSet(this, _C5_b, 0, "f");
}
}
_C5_b = new WeakMap();
// All code paths must contain assignment
class C6 {
constructor(cond) {
_C6_b.set(this, void 0);
if (cond) {
return;
}
this.a = 0;
__classPrivateFieldSet(this, _C6_b, 0, "f");
}
}
_C6_b = new WeakMap();
class C7 {
constructor(cond) {
_C7_b.set(this, void 0);
if (cond) {
this.a = 1;
__classPrivateFieldSet(this, _C7_b, 1, "f");
return;
}
this.a = 0;
__classPrivateFieldSet(this, _C7_b, 1, "f");
}
}
_C7_b = new WeakMap();
// Properties with string literal names aren't checked
class C8 {
}
// No strict initialization checks for abstract members
class C9 {
}
// Properties with non-undefined types must be assigned before they can be accessed
// within their constructor
class C10 {
constructor() {
_C10_d.set(this, void 0);
let x = this.a; // Error
this.a = this.b; // Error
this.b = __classPrivateFieldGet(this, _C10_d, "f"); //Error
this.b = x;
__classPrivateFieldSet(this, _C10_d, x, "f");
let y = this.c;
}
}
_C10_d = new WeakMap();
class C11 {
constructor() {
_C11_b.set(this, void 0);
this.a = someValue();
__classPrivateFieldSet(this, _C11_b, someValue(), "f");
}
}
_C11_b = new WeakMap();
const a = 'a';
const b = Symbol();
class C12 {
constructor() {
this[a] = 1;
this[b] = 1;
this['c'] = 1;
}
}
var E;
(function (E) {
E["A"] = "A";
E["B"] = "B";
})(E || (E = {}));
class C13 {
constructor() {
this[E.A] = 1;
}
}
E.A;
//// [strictPropertyInitialization.d.ts]
declare class C1 {
#private;
a: number;
b: number | undefined;
c: number | null;
d?: number;
}
declare class C2 {
#private;
a: number;
b: number | undefined;
c: number | null;
d?: number;
}
declare class C3 {
static a: number;
static b: number | undefined;
static c: number | null;
static d?: number;
}
declare class C4 {
#private;
a: number;
b: number;
c: string;
}
declare class C5 {
#private;
a: number;
constructor();
}
declare class C6 {
#private;
a: number;
constructor(cond: boolean);
}
declare class C7 {
#private;
a: number;
constructor(cond: boolean);
}
declare class C8 {
a: number;
"b": number;
0: number;
}
declare abstract class C9 {
abstract a: number;
abstract b: number | undefined;
abstract c: number | null;
abstract d?: number;
}
declare class C10 {
#private;
a: number;
b: number;
c?: number;
constructor();
}
declare function someValue(): any;
declare class C11 {
#private;
a: number;
constructor();
}
declare const a = "a";
declare const b: unique symbol;
declare class C12 {
[a]: number;
[b]: number;
['c']: number;
constructor();
}
declare enum E {
A = "A",
B = "B"
}
declare class C13 {
[E.A]: number;
constructor();
}
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