Swift equivalent to Objective-C FourCharCode single quote literals (e.g. 'TEXT')

Question

I am trying replicate some Objective C cocoa in Swift. All is good until I come across the following:

// Set a new type and creator:
unsigned long type = \'TEXT\         


        

Answer 1

Using NSHFSTypeCodeFromFileType does work, but only for 4-character strings wrapped with single quotes, aka 6-character strings. It returns 0 for unquoted 4-character strings.

So wrap your 4-character string in ' ' before passing it to the function:

extension FourCharCode: ExpressibleByStringLiteral {

    public init(stringLiteral value: StringLiteralType) {
        if value.count == 4 {
            self = NSHFSTypeCodeFromFileType("'\(value)'")
        } else {
            self = 0
        }
    }

}