protocol ExpressibleByUnicodeScalarLiteral A type that can be initialized with a string literal containing a single Unicode scalar value. The String, StaticString, Character, and UnicodeScalar types all conform to the ExpressibleByUnicodeScalarLiteral protocol. You can initialize a variable of any of these types using a string literal that holds a single Unicode scalar. let ñ: UnicodeScalar = "ñ" print(ñ) // Prints "ñ" Conforming to ExpressibleByUnicodeScalarLiteral To add ExpressibleByUnicodeScalarLiteral conformance to your custom type, implement the required initializer. Inheritance View Protocol Hierarchy → Associated Types UnicodeScalarLiteralType A type that can represent a Unicode scalar literal. Valid types for UnicodeScalarLiteralType are UnicodeScalar, String, and StaticString. Import import Swift Initializers init(unicodeScalarLiteral:) Required Creates an instance initialized to the given value. Declaration init(unicodeScalarLiteral value: Self.UnicodeScalarLiteralType)