ES6 unicode extensions, part 1.

src/scanner.h

Index: src/scanner.h
diff --git a/src/scanner.h b/src/scanner.h
index e626f206c74952c856d77d55b708b9e01661b1ac..ba0fcdcff9846b43045a7984cc46c5fb8480ae51 100644
--- a/src/scanner.h
+++ b/src/scanner.h
@@ -458,6 +458,8 @@ class Scanner {
   void SetHarmonyClasses(bool classes) {
     harmony_classes_ = classes;
   }
+  bool HarmonyUnicode() const { return harmony_unicode_; }
+  void SetHarmonyUnicode(bool unicode) { harmony_unicode_ = unicode; }
 
   // Returns true if there was a line terminator before the peek'ed token,
   // possibly inside a multi-line comment.
@@ -611,6 +613,10 @@ class Scanner {
   }
 
   uc32 ScanHexNumber(int expected_length);
+  // Scan a number of any length but not bigger than max_value. For example, the
+  // number can be 000000001, so it's very long in characters but its value is
+  // small.
+  uc32 ScanUnlimitedLengthHexNumber(int max_value);
 
   // Scans a single JavaScript token.
   void Scan();
@@ -637,6 +643,8 @@ class Scanner {
   // Decodes a Unicode escape-sequence which is part of an identifier.
   // If the escape sequence cannot be decoded the result is kBadChar.
   uc32 ScanIdentifierUnicodeEscape();
+  // Helper for the above functions.
+  uc32 ScanUnicodeEscape();
 
   // Return the current source position.
   int source_pos() {
@@ -681,6 +689,8 @@ class Scanner {
   bool harmony_numeric_literals_;
   // Whether we scan 'class', 'extends', 'static' and 'super' as keywords.
   bool harmony_classes_;
+  // Whether we allow \u{xxxxx}.
+  bool harmony_unicode_;
 };
 
 } }  // namespace v8::internal