Cosmetic: Add macros for NaN, undefined and Infinity to native js code.

src/regexp.js

 // Copyright 2012 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 171 matching lines @@
       return null;
     }
   } else {
     i = 0;
   }
 
   %_Log('regexp', 'regexp-exec,%0r,%1S,%2i', [this, string, lastIndex]);
   // matchIndices is either null or the lastMatchInfo array.
   var matchIndices = %_RegExpExec(this, string, i, lastMatchInfo);
 
-  if (matchIndices === null) {
+  if (IS_NULL(matchIndices)) {
     this.lastIndex = 0;
     return null;
   }
 
   // Successful match.
   lastMatchInfoOverride = null;
   if (global) {
     this.lastIndex = lastMatchInfo[CAPTURE1];
   }
   return BuildResultFromMatchInfo(matchIndices, string);
@@ skipping 22 matching lines @@
   var i = TO_INTEGER(lastIndex);
 
   if (this.global) {
     if (i < 0 || i > string.length) {
       this.lastIndex = 0;
       return false;
     }
     %_Log('regexp', 'regexp-exec,%0r,%1S,%2i', [this, string, lastIndex]);
     // matchIndices is either null or the lastMatchInfo array.
     var matchIndices = %_RegExpExec(this, string, i, lastMatchInfo);
-    if (matchIndices === null) {
+    if (IS_NULL(matchIndices)) {
       this.lastIndex = 0;
       return false;
     }
     lastMatchInfoOverride = null;
     this.lastIndex = lastMatchInfo[CAPTURE1];
     return true;
   } else {
     // Non-global regexp.
     // Remove irrelevant preceeding '.*' in a non-global test regexp.
     // The expression checks whether this.source starts with '.*' and
     // that the third char is not a '?'.
     var regexp = this;
     if (%_StringCharCodeAt(regexp.source, 0) == 46 &&  // '.'
         %_StringCharCodeAt(regexp.source, 1) == 42 &&  // '*'
         %_StringCharCodeAt(regexp.source, 2) != 63) {  // '?'
       regexp = TrimRegExp(regexp);
     }
     %_Log('regexp', 'regexp-exec,%0r,%1S,%2i', [regexp, string, lastIndex]);
     // matchIndices is either null or the lastMatchInfo array.
     var matchIndices = %_RegExpExec(regexp, string, 0, lastMatchInfo);
-    if (matchIndices === null) {
+    if (IS_NULL(matchIndices)) {
       this.lastIndex = 0;
       return false;
     }
     lastMatchInfoOverride = null;
     return true;
   }
 }
 
 function TrimRegExp(regexp) {
   if (!%_ObjectEquals(regexp_key, regexp)) {
@@ skipping 110 matching lines @@
 
 // Property of the builtins object for recording the result of the last
 // regexp match.  The property lastMatchInfo includes the matchIndices
 // array of the last successful regexp match (an array of start/end index
 // pairs for the match and all the captured substrings), the invariant is
 // that there are at least two capture indeces.  The array also contains
 // the subject string for the last successful match.
 var lastMatchInfo = new InternalPackedArray(
     2,                 // REGEXP_NUMBER_OF_CAPTURES
     "",                // Last subject.
-    void 0,            // Last input - settable with RegExpSetInput.
+    UNDEFINED,         // Last input - settable with RegExpSetInput.
     0,                 // REGEXP_FIRST_CAPTURE + 0
     0                  // REGEXP_FIRST_CAPTURE + 1
 );
 
 // Override last match info with an array of actual substrings.
 // Used internally by replace regexp with function.
 // The array has the format of an "apply" argument for a replacement
 // function.
 var lastMatchInfoOverride = null;
 
@@ skipping 78 matching lines @@
 
   for (var i = 1; i < 10; ++i) {
     %DefineOrRedefineAccessorProperty($RegExp, '$' + i,
                                       RegExpMakeCaptureGetter(i), NoOpSetter,
                                       DONT_DELETE);
   }
   %ToFastProperties($RegExp);
 }
 
 SetUpRegExp();