JavaScript: Port regular expression parser to Java.

Author: Max Schaefer

javascript/extractor/src/com/semmle/js/ast/regexp/Error.java

@@ -7,6 +7,20 @@
  * An error encountered while parsing a regular expression.
  */
 public class Error extends SourceElement {
+	public static final int UNEXPECTED_EOS = 0;
+	public static final int UNEXPECTED_CHARACTER = 1;
+	public static final int EXPECTED_DIGIT = 2;
+	public static final int EXPECTED_HEX_DIGIT = 3;
+	public static final int EXPECTED_CONTROL_LETTER = 4;
+	public static final int EXPECTED_CLOSING_PAREN = 5;
+	public static final int EXPECTED_CLOSING_BRACE = 6;
+	public static final int EXPECTED_EOS = 7;
+	public static final int OCTAL_ESCAPE = 8;
+	public static final int INVALID_BACKREF = 9;
+	public static final int EXPECTED_RBRACKET = 10;
+	public static final int EXPECTED_IDENTIFIER = 11;
+	public static final int EXPECTED_CLOSING_ANGLE = 12;
+
 	private final int code;
 
 	public Error(SourceLocation loc, Number code) {