Is automatic identification of the final modifier a feature of the compiler?

In Swift, the compiler does not automatically determine that a method or class should be marked as final. The final modifier needs to be explicitly specified to prevent overriding a method or inheriting a class. This allows the compiler to optimize the code, knowing that the behavior will not change in subclasses.

Example:

final class MyClass {
    final func doSomething() {
        print("Action is being performed")
    }
}

Without explicitly specifying final, the compiler will not consider the method or class as final.