NSScanner Utility

NSScanner+Z.swift

import Foundation

extension NSScanner {

	func scanStringFromSet(strings: Set<String>) -> String? {
		for string in strings {
			if self.scanString(string, intoString: nil) {
				return string
			}
		}
		return nil
	}

	func scanCharactersFromSet(set: NSCharacterSet) -> String? {
		var string: NSString? = nil
		if self.scanCharactersFromSet(set, intoString: &string) {
			return string as? String
		}
		return nil
	}

	func scanUpToCharactersFromSet(set: NSCharacterSet) -> String? {
		var string: NSString? = nil
		if self.scanUpToCharactersFromSet(set, intoString: &string) {
			return string as? String
		}
		return nil
	}

	func scanString(string: String) -> String? {
		var outstring: NSString? = nil
		if self.scanString(string, intoString: &outstring) {
			return string
		}
		return nil
	}

	func scanUpToString(string: String) -> String? {
		var outstring: NSString? = nil
		if self.scanUpToString(string, intoString: &outstring) {
			return string
		}
		return nil
	}

}