enum Never The return type of functions that do not return normally; a type with no values. Use Never as the return type when declaring a closure, function, or method that unconditionally throws an error, traps, or otherwise does not terminate. func crashAndBurn() -> Never { fatalError("Something very, very bad happened")} Import import Swift
The return type of functions that do not return normally; a type with no values.
Use
Neveras the return type when declaring a closure, function, or method that unconditionally throws an error, traps, or otherwise does not terminate.