[es6] support template literals after MemberExpression

src/scanner.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Features shared by parsing and pre-parsing scanners.
 
 #ifndef V8_SCANNER_H_
 #define V8_SCANNER_H_
 
 #include "src/allocation.h"
@@ skipping 514 matching lines @@
 
   // Literal buffer support
   inline void StartLiteral() {
     LiteralBuffer* free_buffer = (current_.literal_chars == &literal_buffer1_) ?
             &literal_buffer2_ : &literal_buffer1_;
     free_buffer->Reset();
     next_.literal_chars = free_buffer;
   }
 
   inline void StartRawLiteral() {
-    raw_literal_buffer_.Reset();
-    next_.raw_literal_chars = &raw_literal_buffer_;
+    LiteralBuffer* free_buffer =
+        (current_.raw_literal_chars == &raw_literal_buffer1_) ?
+            &raw_literal_buffer2_ : &raw_literal_buffer1_;
+    free_buffer->Reset();
+    next_.raw_literal_chars = free_buffer;
   }
 
   INLINE(void AddLiteralChar(uc32 c)) {
     DCHECK_NOT_NULL(next_.literal_chars);
     next_.literal_chars->AddChar(c);
   }
 
   INLINE(void AddRawLiteralChar(uc32 c)) {
     DCHECK_NOT_NULL(next_.raw_literal_chars);
     next_.raw_literal_chars->AddChar(c);
@@ skipping 162 matching lines @@
 
   // Buffers collecting literal strings, numbers, etc.
   LiteralBuffer literal_buffer1_;
   LiteralBuffer literal_buffer2_;
 
   // Values parsed from magic comments.
   LiteralBuffer source_url_;
   LiteralBuffer source_mapping_url_;
 
   // Buffer to store raw string values
-  LiteralBuffer raw_literal_buffer_;
+  LiteralBuffer raw_literal_buffer1_;
+  LiteralBuffer raw_literal_buffer2_;
 
   TokenDesc current_;  // desc for current token (as returned by Next())
   TokenDesc next_;     // desc for next token (one token look-ahead)
 
   // Input stream. Must be initialized to an Utf16CharacterStream.
   Utf16CharacterStream* source_;
 
 
   // Start position of the octal literal last scanned.
   Location octal_pos_;
@@ skipping 21 matching lines @@
   bool harmony_classes_;
   // Whether we scan TEMPLATE_SPAN and TEMPLATE_TAIL
   bool harmony_templates_;
   // Whether we allow \u{xxxxx}.
   bool harmony_unicode_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCANNER_H_