Function applyToUpdateRecorder

packages/schematics/angular/utility/change.ts:141–154

(recorder: UpdateRecorder, changes: Change[])

}

export function applyToUpdateRecorder(recorder: UpdateRecorder, changes: Change[]): void {
  for (const change of changes) {
    if (change instanceof InsertChange) {
      recorder.insertLeft(change.pos, change.toAdd);
    } else if (change instanceof RemoveChange) {
      recorder.remove(change.order, change.toRemove.length);
    } else if (change instanceof ReplaceChange) {
      recorder.remove(change.order, change.oldText.length);
      recorder.insertLeft(change.order, change.newText);
    } else if (!(change instanceof NoopChange)) {
      throw new Error('Unknown Change type encountered when updating a recorder.');
    }
  }
}