I am playing a level 4 character: Cleric, War Domain (1) and Fighter Battle Master (3).
The War Domain's War Priest feature is described as follows:
From 1st level, your god delivers bolts of inspiration to you while you are engaged in battle. When you use the Attack action, you can make one weapon attack as a bonus action. You can use this feature a number of times equal to your Wisdom modifier (a minimum of once). You regain all expended uses when you finish a long rest.
The description of the Battle Master's Precision Attack feature:
When you make a weapon attack roll against a creature, you can expend one superiority to add to the roll. You can use this maneuver before or after making the attack roll, but before any effects of the attack are applied.
The question: Can both features be used in the same attack, or must they be used on separate independent attacks?