ProtocolSwift5.9.0
ExpressibleByNilLiteral
A type that can be initialized using the nil literal, nil.
protocol ExpressibleByNilLiteralnil has a specific meaning in Swift—the absence of a value. Only the Optional type conforms to ExpressibleByNilLiteral. ExpressibleByNilLiteral conformance for types that use nil for other purposes is discouraged.
Requirements
init(nilLiteral: ()) Creates an instance initialized with
nil.