Method constructor

packages/core/src/di/injection_token.ts:96–117

(
    protected _desc: string,
    options?: {
      providedIn?: Type<any> | 'root' | 'platform' | 'any' | null;
      factory: () => T;
    },
  )

  );

  constructor(
    protected _desc: string,
    options?: {
      providedIn?: Type<any> | 'root' | 'platform' | 'any' | null;
      factory: () => T;
    },
  ) {
    this.ɵprov = undefined;
    if (typeof options == 'number') {
      (typeof ngDevMode === 'undefined' || ngDevMode) &&
        assertLessThan(options, 0, 'Only negative numbers are supported here');
      // This is a special hack to assign __NG_ELEMENT_ID__ to this instance.
      // See `InjectorMarkers`
      (this as any).__NG_ELEMENT_ID__ = options;
    } else if (options !== undefined) {
      this.ɵprov = ɵɵdefineInjectable({
        token: this,
        providedIn: options.providedIn || 'root',
        factory: options.factory,
      });
    }
  }

  /**
   * @internal