Function

fatalError(_:file:line:)

Unconditionally prints a given message and stops execution.

Declaration

func fatalError(_ message: @autoclosure () -> String = String(), file: StaticString = #file, line: UInt = #line) -> Never

Parameters

message: The string to print. The default is an empty string.
file: The file name to print with message. The default is the file where fatalError(_:file:line:) is called.
line: The line number to print along with message. The default is the line number where fatalError(_:file:line:) is called.

See Also

Exiting a Program

The return type of functions that do not return normally, that is, a type with no values.