Function assertDirectiveDef

packages/core/src/render3/assert.ts:138–144

(obj: any)

 * an interface, so we can't do a direct instanceof check.
 */
export function assertDirectiveDef<T>(obj: any): asserts obj is DirectiveDef<T> {
  if (obj.type === undefined || obj.selectors == undefined || obj.inputs === undefined) {
    throwError(
      `Expected a DirectiveDef/ComponentDef and this object does not seem to have the expected shape.`,
    );
  }
}

export function assertIndexInDeclRange(tView: TView, index: number) {
  assertBetween(HEADER_OFFSET, tView.bindingStartIndex, index);