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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;
}
// No strict initialization checks in ambient contexts
declare class C2 {
a: number;
b: number | undefined;
c: number | null;
d?: 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";
}
// Assignment in constructor satisfies strict initialization check
class C5 {
a: number;
constructor() {
this.a = 0;
}
}
// All code paths must contain assignment
class C6 {
a: number; // Error
constructor(cond: boolean) {
if (cond) {
return;
}
this.a = 0;
}
}
class C7 {
a: number;
constructor(cond: boolean) {
if (cond) {
this.a = 1;
return;
}
this.a = 0;
}
}
// 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;
constructor() {
let x = this.a; // Error
this.a = this.b; // Error
this.b = x;
let y = this.c;
}
}
//// [strictPropertyInitialization.js]
"use strict";
// Properties with non-undefined types require initialization
var C1 = /** @class */ (function () {
function C1() {
}
return C1;
}());
// No strict initialization checks for static members
var C3 = /** @class */ (function () {
function C3() {
}
return C3;
}());
// Initializer satisfies strict initialization check
var C4 = /** @class */ (function () {
function C4() {
this.a = 0;
this.b = 0;
this.c = "abc";
}
return C4;
}());
// Assignment in constructor satisfies strict initialization check
var C5 = /** @class */ (function () {
function C5() {
this.a = 0;
}
return C5;
}());
// All code paths must contain assignment
var C6 = /** @class */ (function () {
function C6(cond) {
if (cond) {
return;
}
this.a = 0;
}
return C6;
}());
var C7 = /** @class */ (function () {
function C7(cond) {
if (cond) {
this.a = 1;
return;
}
this.a = 0;
}
return C7;
}());
// Properties with string literal names aren't checked
var C8 = /** @class */ (function () {
function C8() {
}
return C8;
}());
// No strict initialization checks for abstract members
var C9 = /** @class */ (function () {
function C9() {
}
return C9;
}());
// Properties with non-undefined types must be assigned before they can be accessed
// within their constructor
var C10 = /** @class */ (function () {
function C10() {
var x = this.a; // Error
this.a = this.b; // Error
this.b = x;
var y = this.c;
}
return C10;
}());
//// [strictPropertyInitialization.d.ts]
declare class C1 {
a: number;
b: number | undefined;
c: number | null;
d?: number;
}
declare class C2 {
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 {
a: number;
b: number;
c: string;
}
declare class C5 {
a: number;
constructor();
}
declare class C6 {
a: number;
constructor(cond: boolean);
}
declare class C7 {
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 {
a: number;
b: number;
c?: number;
constructor();
}
|
