no message

src/Common/CommonConstants.java

@@ -1,7 +1,22 @@
 package Common;
+import Common.Utils.Vector_;
+
+import java.util.Vector;
+import java.util.regex.Pattern;
 public class CommonConstants {
     public static final int Nan = -1;
+    public static final Pattern VALID_EMAIL_ADDRESS_REGEX =
+            Pattern.compile("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,6}$", Pattern.CASE_INSENSITIVE);
     public static char[] regular_metasymbols = new char[]{
             '<', '>', '(', ')', '[', ']', '{', '}', '^', '-', '=', '$', '!', '|', '?', '*', '+', '.'
     };
+    public static char toStrike = (char) 822;
+    public static char boop = (char) 7;
+    public static Vector<Character> forbidden_file_name_characters = new Vector_<>(
+            '#', '%', '&', '{', '}',
+            '<', '>', '*', '?', '!',
+            '$', '\'', '\"', '@', '+',
+            '`', '|', '=', '#', ':', '/', '\\',
+            '~', '^'
+    );
 }