Swift: if a do return try fails does catch execute

Question

I am working on a piece of code that is going to fetch an array of NSManagedObjects from CoreData. When using a do catch statement in my code it doesn't seem right to do it this way, but it is the simplest way I can write this line of code.

In any other scenario when you use the return statement you are jumping out of the current function you are in. And you can be assured that no other code in your function will execute past the return statement. I am wondering if the same applies to Swift's do catch paradigm.

class func getAll() -> [MMNotification] {
    let context = appDelegate.persistentContainer.viewContext
    let fetchRequest = NSFetchRequest<MMNotification>(entityName: "MMNotification")
    do {
        return try context.fetch(fetchRequest)
    }
    catch {
        // Will this 'catch' if the try fails, 
        // even if we said we are 'return'ing right before the 'try'?
        return []
    }
}

Here I am fetching a list of notifications stored in CoreData. In the do block you can see the line of code in question.

QUESTION

Will the catch block execute if the try fails after already stating that the function should return?

Answer 1

What you have should work as expected. Basically what happens is if a throw occurs at any time within a do, the catch is called and any code after the throw will not be executed.