Introduced a TempAssign utility because I just couldn't watch this anymore. Y...

src/utils.h

 // 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 354 matching lines @@
 
   // Factory method for creating empty vectors.
   static Vector<T> empty() { return Vector<T>(NULL, 0); }
 
  private:
   T* start_;
   int length_;
 };
 
 
+// A temporary assignment sets a (non-local) variable to a value on
+// construction and resets it the value on destruction.

[Mads Ager (chromium), 2008/12/15 08:36:30]

it the -> the

+template <typename T>
+class TempAssign {
+ public:
+  TempAssign(T* var, T value): var_(var), old_value_(*var) {
+    *var = value;
+  }
+
+  ~TempAssign() { *var_ = old_value_; }
+
+ private:
+  T* var_;
+  T old_value_;
+};
+
+
 template <typename T, int kSize>
 class EmbeddedVector : public Vector<T> {
  public:
   EmbeddedVector() : Vector<T>(buffer_, kSize) { }
  private:
   T buffer_[kSize];
 };
 
 
 inline Vector<const char> CStrVector(const char* data) {
@@ skipping 170 matching lines @@
   ptr[2] = value >> 8;
   ptr[1] = value >> 16;
   ptr[0] = value >> 24;
 #endif
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_UTILS_H_