Function shouldAddAbstractDirective

packages/core/src/render3/jit/directive.ts:514–544

(type: Type<any>)

];

function shouldAddAbstractDirective(type: Type<any>): boolean {
  const reflect = getReflect();

  if (LIFECYCLE_HOOKS.some((hookName) => reflect.hasLifecycleHook(type, hookName))) {
    return true;
  }

  const propMetadata = reflect.propMetadata(type);

  for (const field in propMetadata) {
    const annotations = propMetadata[field];

    for (let i = 0; i < annotations.length; i++) {
      const current = annotations[i];
      const metadataName = current.ngMetadataName;

      if (
        isInputAnnotation(current) ||
        isContentQuery(current) ||
        isViewQuery(current) ||
        metadataName === 'Output' ||
        metadataName === 'HostBinding' ||
        metadataName === 'HostListener'
      ) {
        return true;
      }
    }
  }

  return false;
}