Regex.swift

struct Regex {
    let pattern: String
    let options: NSRegularExpressionOptions!

    private var matcher: NSRegularExpression {
        return NSRegularExpression(pattern: self.pattern, options: self.options, error: nil)
    }

    init(pattern: String, options: NSRegularExpressionOptions = nil) {
        self.pattern = pattern
        self.options = options
    }

    func match(string: String, options: NSMatchingOptions = nil) -> Bool {
        return self.matcher.numberOfMatchesInString(string, options: options, range: NSMakeRange(0, string.utf16Count)) != 0
    }
}

extension Regex: StringLiteralConvertible {
    typealias ExtendedGraphemeClusterLiteralType = StringLiteralType

    init(unicodeScalarLiteral value: UnicodeScalarLiteralType) {
        self.pattern = "\(value)"
    }
    
    init(extendedGraphemeClusterLiteral value: ExtendedGraphemeClusterLiteralType) {
        self.pattern = value
    }
    
    init(stringLiteral value: StringLiteralType) {
        self.pattern = value
    }
}