Allow numeric literals to be checked for a decimal point.

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 417 matching lines @@
   bool is_next_contextual_keyword(Vector<const char> keyword) {
     DCHECK_NOT_NULL(next_.literal_chars);
     return next_.literal_chars->is_contextual_keyword(keyword);
   }
 
   const AstRawString* CurrentSymbol(AstValueFactory* ast_value_factory);
   const AstRawString* NextSymbol(AstValueFactory* ast_value_factory);
   const AstRawString* CurrentRawSymbol(AstValueFactory* ast_value_factory);
 
   double DoubleValue();
+  bool ContainsDot();
   bool LiteralMatches(const char* data, int length, bool allow_escapes = true) {
     if (is_literal_one_byte() &&
         literal_length() == length &&
         (allow_escapes || !literal_contains_escapes())) {
       const char* token =
           reinterpret_cast<const char*>(literal_one_byte_string().start());
       return !strncmp(token, data, length);
     }
     return false;
   }
@@ skipping 350 matching lines @@
   bool has_multiline_comment_before_next_;
   // Whether we scan 'module', 'import', 'export' as keywords.
   bool harmony_modules_;
   // Whether we allow \u{xxxxx}.
   bool harmony_unicode_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCANNER_H_