Implement handling of arrow functions in the parser

src/scanner.cc

Index: src/scanner.cc
diff --git a/src/scanner.cc b/src/scanner.cc
index df19ee8faf3314176542f89a5c47588371350811..d121466e74330996d06a7be802644e235cd8dfc6 100644
--- a/src/scanner.cc
+++ b/src/scanner.cc
@@ -395,10 +395,12 @@ void Scanner::Scan() {
         break;
 
       case '=':
-        // = == ===
+        // = == === =>
         Advance();
         if (c0_ == '=') {
           token = Select('=', Token::EQ_STRICT, Token::EQ);
+        } else if (c0_ == '>') {
+          token = Select(Token::ARROW);
         } else {
           token = Token::ASSIGN;
         }
@@ -928,6 +930,16 @@ static Token::Value KeywordOrIdentifierToken(const uint8_t* input,
 }
 
 
+bool Scanner::IdentifierIsFutureStrictReserved(
+    const AstRawString* string) const {
+  // Keywords are always 1-byte strings.
+  return string->is_one_byte() &&
+      Token::FUTURE_STRICT_RESERVED_WORD == KeywordOrIdentifierToken(
+          string->raw_data(), string->length(),
+          harmony_scoping_, harmony_modules_);
+}
+
+
 Token::Value Scanner::ScanIdentifierOrKeyword() {
   ASSERT(unicode_cache_->IsIdentifierStart(c0_));
   LiteralScope literal(this);