Changes in src/Common/utility.h [79970ed:1ba88a0]

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; }
+};
+
+template< typename T >
+struct reverseIterate_t {
+        T& ref;
+
+        reverseIterate_t( T & ref ) : ref(ref) {}
+
+        typedef typename T::reverse_iterator iterator;
+        iterator begin() { return ref.rbegin(); }
+        iterator end() { return ref.rend(); }
+};
+
+template< typename T >
+reverseIterate_t< T > reverseIterate( T & ref ) {
+        return reverseIterate_t< T >( ref );
+}
+
 #endif // _UTILITY_H