work on #11

Author: nuclearace

SwiftIO/SwiftRegex.swift

@@ -43,7 +43,7 @@ public class SwiftRegex: NSObject, BooleanType {
     }
 
     final var targetRange: NSRange {
-        return NSRange(location: 0,length: countElements(target))
+        return NSRange(location: 0,length: target.utf16Count)
     }
 
     final func substring(range: NSRange) -> String? {
@@ -102,7 +102,7 @@ public class SwiftRegex: NSObject, BooleanType {
                 let mut = NSMutableString(string: target)
                 mut.replaceCharactersInRange(match.rangeAtIndex(groupno), withString: replacement)
 
-                target = mut
+                target = mut as String
             }
         }
     }
@@ -154,7 +154,7 @@ public class SwiftRegex: NSObject, BooleanType {
 
             out.appendString(substring( NSRange(location:pos, length:targetRange.length-pos))!)
 
-            return out
+            return out as String
     }
 
     public var boolValue: Bool {
@@ -206,4 +206,4 @@ public func ~= (left: SwiftRegex, right: ([String]?) -> String) -> String {
     return left.substituteMatches({match, stop -> String in
         return right(left.groupsForMatch(match))
         }, options: nil)
-}
+}