Class syntax parsing

src/preparser.cc

Index: src/preparser.cc
diff --git a/src/preparser.cc b/src/preparser.cc
index a60742aca9fe9a08d9ca33f76d4c2d75e1be4f80..3173cc0f900255aa1d764736d8c6f70d51da0ddb 100644
--- a/src/preparser.cc
+++ b/src/preparser.cc
@@ -78,6 +78,12 @@ PreParserIdentifier PreParserTraits::GetSymbol(Scanner* scanner) {
   if (scanner->UnescapedLiteralMatches("arguments", 9)) {
     return PreParserIdentifier::Arguments();
   }
+  if (scanner->UnescapedLiteralMatches("prototype", 9)) {
+    return PreParserIdentifier::Prototype();
+  }
+  if (scanner->UnescapedLiteralMatches("constructor", 11)) {
+    return PreParserIdentifier::Constructor();
+  }
   return PreParserIdentifier::Default();
 }
 
@@ -178,6 +184,8 @@ PreParser::Statement PreParser::ParseSourceElement(bool* ok) {
   switch (peek()) {
     case Token::FUNCTION:
       return ParseFunctionDeclaration(ok);
+    case Token::CLASS:
+      return ParseClassDeclaration(ok);
     case Token::CONST:
       return ParseVariableStatement(kSourceElement, ok);
     case Token::LET:
@@ -305,6 +313,9 @@ PreParser::Statement PreParser::ParseStatement(bool* ok) {
       }
     }
 
+    case Token::CLASS:
+      return ParseClassDeclaration(CHECK_OK);
+
     case Token::DEBUGGER:
       return ParseDebuggerStatement(ok);
 
@@ -345,6 +356,18 @@ PreParser::Statement PreParser::ParseFunctionDeclaration(bool* ok) {
 }
 
 
+PreParser::Statement PreParser::ParseClassDeclaration(bool* ok) {
+  Expect(Token::CLASS, CHECK_OK);
+  int pos = position();
+  bool is_strict_reserved = false;
+  Identifier name =
+      ParseIdentifierOrStrictReservedWord(&is_strict_reserved, CHECK_OK);
+  ParseClassLiteral(name, scanner()->location(), is_strict_reserved, pos,
+                    CHECK_OK);
+  return Statement::Default();
+}
+
+
 PreParser::Statement PreParser::ParseBlock(bool* ok) {
   // Block ::
   //   '{' Statement* '}'