Function pureFunctionVInternal

packages/core/src/render3/pure_function.ts:471–487

(
  lView: LView,
  bindingRoot: number,
  slotOffset: number,
  pureFn: (...v: any[]) => any,
  exps: any[],
  thisArg?: any,
)

 * @returns Updated or cached value
 */
export function pureFunctionVInternal(
  lView: LView,
  bindingRoot: number,
  slotOffset: number,
  pureFn: (...v: any[]) => any,
  exps: any[],
  thisArg?: any,
): any {
  let bindingIndex = bindingRoot + slotOffset;
  let different = false;
  for (let i = 0; i < exps.length; i++) {
    bindingUpdated(lView, bindingIndex++, exps[i]) && (different = true);
  }
  return different
    ? updateBinding(lView, bindingIndex, pureFn.apply(thisArg, exps))
    : getPureFunctionReturnValue(lView, bindingIndex);
}