Changes in src/Common/utility.h [79970ed:c8dfcd3]

File:

• src/Common/utility.h (modified) (1 diff)

src/Common/utility.h

@@ -246 +246 @@
 }
 
+// RAII object to regulate "save and restore" behaviour, e.g.
+// void Foo::bar() {
+//   ValueGuard<int> guard(var); // var is a member of type Foo
+//   var = ...;
+// } // var's original value is restored
+template< typename T >
+struct ValueGuard {
+        T old;
+        T& ref;
+
+        ValueGuard(T& inRef) : old(inRef), ref(inRef) {}
+        ~ValueGuard() { ref = old; }
+};
+
 #endif // _UTILITY_H