Function getTIcu

packages/core/src/render3/i18n/i18n_util.ts:39–57

(tView: TView, index: number)

 * @param index Index where the value should be read from.
 */
export function getTIcu(tView: TView, index: number): TIcu | null {
  const value = tView.data[index] as null | TIcu | TIcuContainerNode | string;
  if (value === null || typeof value === 'string') return null;
  if (
    ngDevMode &&
    !(value.hasOwnProperty('tView') || value.hasOwnProperty('currentCaseLViewIndex'))
  ) {
    throwError("We expect to get 'null'|'TIcu'|'TIcuContainer', but got: " + value);
  }
  // Here the `value.hasOwnProperty('currentCaseLViewIndex')` is a polymorphic read as it can be
  // either TIcu or TIcuContainerNode. This is not ideal, but we still think it is OK because it
  // will be just two cases which fits into the browser inline cache (inline cache can take up to
  // 4)
  const tIcu = value.hasOwnProperty('currentCaseLViewIndex')
    ? (value as TIcu)
    : (value as TIcuContainerNode).value;
  ngDevMode && assertTIcu(tIcu);
  return tIcu;
}

/**
 * Store `TIcu` at a give `index`.