Function pureFunction1Internal

packages/core/src/render3/pure_function.ts:339–351

(
  lView: LView,
  bindingRoot: number,
  slotOffset: number,
  pureFn: (v: any) => any,
  exp: any,
  thisArg?: any,
)

 * @returns Updated or cached value
 */
export function pureFunction1Internal(
  lView: LView,
  bindingRoot: number,
  slotOffset: number,
  pureFn: (v: any) => any,
  exp: any,
  thisArg?: any,
): any {
  const bindingIndex = bindingRoot + slotOffset;
  return bindingUpdated(lView, bindingIndex, exp)
    ? updateBinding(lView, bindingIndex + 1, thisArg ? pureFn.call(thisArg, exp) : pureFn(exp))
    : getPureFunctionReturnValue(lView, bindingIndex + 1);
}

/**
 * If the value of any provided exp has changed, calls the pure function to return