[+] Encapsulate Regex matching stuff

ProjectClock/Utils.swift

@@ -119,3 +119,30 @@ extension UIViewController
         self.present(alert, animated: true, completion: nil)
     }
 }
+
+
+/// Regex Matching (Credit: https://www.hackingwithswift.com/articles/108/how-to-use-regular-expressions-in-swift)
+extension NSRegularExpression
+{
+    convenience init(_ pattern: String)
+    {
+        do { try self.init(pattern: pattern) }
+        catch { preconditionFailure("Illegal regular expression: \(pattern).") }
+    }
+    
+    func matches(_ string: String) -> Bool
+    {
+        let range = NSRange(location: 0, length: string.utf16.count)
+        return firstMatch(in: string, options: [], range: range) != nil
+    }
+}
+
+extension String
+{
+    static func ~= (lhs: String, rhs: String) -> Bool
+    {
+        guard let regex = try? NSRegularExpression(pattern: rhs) else { return false }
+        let range = NSRange(location: 0, length: lhs.utf16.count)
+        return regex.firstMatch(in: lhs, options: [], range: range) != nil
+    }
+}