Fix some bugs in accessing details of the lastest regexp

src/macros.py

 # Copyright 2006-2009 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 178 matching lines @@
 macro UTC_MS(arg)          = (%_DateField(arg, 18));
 macro UTC_DAYS(arg)        = (%_DateField(arg, 19));
 macro UTC_TIME_IN_DAY(arg) = (%_DateField(arg, 20));
 
 macro TIMEZONE_OFFSET(arg)   = (%_DateField(arg, 21));
 
 macro SET_UTC_DATE_VALUE(arg, value) = (%DateSetValue(arg, value, 1));
 macro SET_LOCAL_DATE_VALUE(arg, value) = (%DateSetValue(arg, value, 0));
 
 # Last input and last subject of regexp matches.
 macro LAST_SUBJECT(array) = ((array)[1]);

[ulan, 2012/04/23 16:59:23]

We can avoid duplication:
macro LAST_SUBJECT(array) = ((array)[LAST_SUBJECT_INDEX]);

[Erik Corry, 2012/04/23 18:54:02]

Done.

[Erik Corry, 2012/04/23 19:04:06]

Spoke too soon.  Our macro system is not advanced enough for this.

+const LAST_SUBJECT_INDEX = 1;
 macro LAST_INPUT(array) = ((array)[2]);
 
 # REGEXP_FIRST_CAPTURE
 macro CAPTURE(index) = (3 + (index));
 const CAPTURE0 = 3;
 const CAPTURE1 = 4;
 
 # For the regexp capture override array.  This has the same
 # format as the arguments to a function called from
 # String.prototype.replace.
@@ skipping 19 matching lines @@
 const TYPE_EXTENSION = 1;
 const TYPE_NORMAL = 2;
 
 # Matches Script::CompilationType from objects.h
 const COMPILATION_TYPE_HOST = 0;
 const COMPILATION_TYPE_EVAL = 1;
 const COMPILATION_TYPE_JSON = 2;
 
 # Matches Messages::kNoLineNumberInfo from v8.h
 const kNoLineNumberInfo = 0;