Irregexp: Added derived knowledge of whether we are at the start of input.

src/flags.cc

 // Copyright 2006-2008 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 420 matching lines @@
     int j = 1;
     for (int i = 1; i < *argc; i++) {
       if (argv[i] != NULL)
         argv[j++] = argv[i];
     }
     *argc = j;
   }
 
   if (FLAG_help) {
     PrintHelp();
+    exit(0);
   }
   // parsed all flags successfully
   return 0;
 }
 
 
 static char* SkipWhiteSpace(char* p) {
   while (*p != '\0' && isspace(*p) != 0) p++;
   return p;
 }
@@ skipping 88 matching lines @@
 const char** JSArguments::argv() { return argv_; }
 const char*& JSArguments::operator[](int idx) { return argv_[idx]; }
 JSArguments& JSArguments::operator=(JSArguments args) {
     argc_ = args.argc_;
     argv_ = args.argv_;
     return *this;
 }
 
 
 } }  // namespace v8::internal