Module not imported for meta-data references. #13449
Description
From #12888 (comment)
after upgrading to TypeScript 2.1.5.
the issue regressed in different place.
when 'strictNullCheck' option is false the following typescript emitt invalid javascript code.
file: auxiliry.ts
export class SomeClass { field: string; } file: main.ts
import { SomeClass } from './auxiliry'; function annotation(): PropertyDecorator { return (target: any): void => { }; } export class ClassA { @annotation() array: SomeClass | null; } Emitted code:
"use strict"; var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) { var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d; if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc); else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r; return c > 3 && r && Object.defineProperty(target, key, r), r; }; var __metadata = (this && this.__metadata) || function (k, v) { if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v); }; function annotation() { return function (target) { }; } var ClassA = (function () { function ClassA() { } return ClassA; }()); __decorate([ annotation(), __metadata("design:type", auxiliry_1.SomeClass) // <-- auxiliry_1 is not emitted as require statement ], ClassA.prototype, "array", void 0); exports.ClassA = ClassA;