How does Smite Evil interact with missing an attack roll?
* Is it something that must be declared before the attack roll is made, and is lost if the roll fails?
* Is it something that I can declare after I make the roll and find out it is successful (presumably before I roll damage dice)?
* Or does it work more like a "charged touch attack" where I declare my smiting before the attack, and it applies to the next thing I actually manage to hit?
* None of the above?
* Is it something that must be declared before the attack roll is made, and is lost if the roll fails?
* Is it something that I can declare after I make the roll and find out it is successful (presumably before I roll damage dice)?
* Or does it work more like a "charged touch attack" where I declare my smiting before the attack, and it applies to the next thing I actually manage to hit?
* None of the above?