ES6: Add support for explicit octal and binary integer literals

src/preparser.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1706 matching lines @@
 }
 
 
 int DuplicateFinder::AddNumber(i::Vector<const char> key, int value) {
   ASSERT(key.length() > 0);
   // Quick check for already being in canonical form.
   if (IsNumberCanonical(key)) {
     return AddAsciiSymbol(key, value);
   }
 
-  int flags = i::ALLOW_HEX | i::ALLOW_OCTALS;
+  int flags = i::ALLOW_HEX | i::ALLOW_OCTAL | i::ALLOW_IMPLICIT_OCTAL |
+      i::ALLOW_BINARY;
   double double_value = StringToDouble(unicode_constants_, key, flags, 0.0);
   int length;
   const char* string;
   if (!std::isfinite(double_value)) {
     string = "Infinity";
     length = 8;  // strlen("Infinity");
   } else {
     string = DoubleToCString(double_value,
                              i::Vector<char>(number_buffer_, kBufferSize));
     length = i::StrLength(string);
@@ skipping 84 matching lines @@
       backing_store_.Add(static_cast<byte>((ascii_length >> 14) | 0x80u));
     }
     backing_store_.Add(static_cast<byte>((ascii_length >> 7) | 0x80u));
   }
   backing_store_.Add(static_cast<byte>(ascii_length & 0x7f));
 
   backing_store_.AddBlock(bytes);
   return backing_store_.EndSequence().start();
 }
 } }  // v8::preparser