Unichar variable in Swift -


how define unichar type variable in swift likes '\0' '\n' in objective-c ?

in swift,

func previouscharacter() -> unichar {     return "\n"     //error }

compiler gave me error:

cannot convert return expression of type 'string' expected return type 'unichar'

but in objective-c, more easy directly.

in swift, character literals of type character.

let exclamationmark: character = "!"

see strings , characters

for advanced readers:

you can extend unichar capability accept character literals:

extension unichar : unicodescalarliteralconvertible {     public typealias unicodescalarliteraltype = unicodescalar      public init(unicodescalarliteral scalar: unicodescalar) {         self.init(scalar.value)     } }   let newline: unichar = "\n" let whitespaces = nscharacterset.whitespaceandnewlinecharacterset()  print("c whitespace \(whitespaces.characterismember(newline))")

however, note swift literals use 4 bytes while unichar uses 2 bytes, therefore characters truncated when converted unichar.


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