Allow [a-\d] in RegExp parser.

test/cctest/test-regexp.cc

 // Copyright 2008 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 108 matching lines @@
   CHECK_PARSE_EQ("[a-zA-Z0-9]", "[a-z A-Z 0-9]");
   CHECK_PARSE_EQ("[-123]", "[- 1 2 3]");
   CHECK_PARSE_EQ("[^123]", "^[1 2 3]");
   CHECK_PARSE_EQ("]", "']'");
   CHECK_PARSE_EQ("}", "'}'");
   CHECK_PARSE_EQ("[a-b-c]", "[a-b - c]");
   CHECK_PARSE_EQ("[\\d]", "[0-9]");
   CHECK_PARSE_EQ("[x\\dz]", "[x 0-9 z]");
   CHECK_PARSE_EQ("[\\d-z]", "[0-9 - z]");
   CHECK_PARSE_EQ("[\\d-\\d]", "[0-9 - 0-9]");
+  CHECK_PARSE_EQ("[z-\\d]", "[z - 0-9]");
   CHECK_PARSE_EQ("\\cj\\cJ\\ci\\cI\\ck\\cK",
                  "'\\x0a\\x0a\\x09\\x09\\x0b\\x0b'");
   CHECK_PARSE_EQ("\\c!", "'c!'");
   CHECK_PARSE_EQ("\\c_", "'c_'");
   CHECK_PARSE_EQ("\\c~", "'c~'");
   CHECK_PARSE_EQ("[a\\]c]", "[a ] c]");
   CHECK_PARSE_EQ("\\[\\]\\{\\}\\(\\)\\%\\^\\#\\ ", "'[]{}()%^# '");
   CHECK_PARSE_EQ("[\\[\\]\\{\\}\\(\\)\\%\\^\\#\\ ]", "[[ ] { } ( ) % ^ #  ]");
   CHECK_PARSE_EQ("\\0", "'\\x00'");
   CHECK_PARSE_EQ("\\8", "'8'");
@@ skipping 129 matching lines @@
   V8::Initialize(NULL);
   const char* kEndBackslash = "\\ at end of pattern";
   ExpectError("\\", kEndBackslash);
   const char* kUnterminatedGroup = "Unterminated group";
   ExpectError("(foo", kUnterminatedGroup);
   const char* kInvalidGroup = "Invalid group";
   ExpectError("(?", kInvalidGroup);
   const char* kUnterminatedCharacterClass = "Unterminated character class";
   ExpectError("[", kUnterminatedCharacterClass);
   ExpectError("[a-", kUnterminatedCharacterClass);
-  const char* kIllegalCharacterClass = "Illegal character class";
-  ExpectError("[a-\\w]", kIllegalCharacterClass);
   const char* kEndControl = "\\c at end of pattern";
   ExpectError("\\c", kEndControl);
   const char* kNothingToRepeat = "Nothing to repeat";
   ExpectError("*", kNothingToRepeat);
   ExpectError("?", kNothingToRepeat);
   ExpectError("+", kNothingToRepeat);
   ExpectError("{1}", kNothingToRepeat);
   ExpectError("{1,2}", kNothingToRepeat);
   ExpectError("{1,}", kNothingToRepeat);
 }
@@ skipping 866 matching lines @@
   // whole block at a time.
   TestSimpleRangeCaseIndependence(CharacterRange('A', 'k'),
                                   CharacterRange('a', 'z'));
 }
 
 
 TEST(Graph) {
   V8::Initialize(NULL);
   Execute("foo$(?!bar)", false, true);
 }