Function lastSelectedElementIdx

packages/core/src/render3/view/directives.ts:519–528

* Returns the last selected element index in the `HostBindingOpCodes` * * For perf reasons we don't need to update the selected element index in `HostBindingOpCodes` only * if it changes. This method returns the last index (or '0' if not found.) * * Selected element index are only the ones whic

(hostBindingOpCodes: HostBindingOpCodes)

 * Selected element index are only the ones which are negative.
 */
function lastSelectedElementIdx(hostBindingOpCodes: HostBindingOpCodes): number {
  let i = hostBindingOpCodes.length;
  while (i > 0) {
    const value = hostBindingOpCodes[--i];
    if (typeof value === 'number' && value < 0) {
      return value;
    }
  }
  return 0;
}

/**
 * Builds up an export map as directives are created, so local refs can be quickly mapped