Changes in src/Common/utility.h [13932f14:134322e]

File:

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

src/Common/utility.h

@@ -244 +244 @@
         ValueGuard(T& inRef) : old(inRef), ref(inRef) {}
         ~ValueGuard() { ref = old; }
+};
+
+template< typename T >
+struct ValueGuardPtr {
+        T old;
+        T* ref;
+
+        ValueGuardPtr(T * inRef) : old( inRef ? *inRef : T() ), ref(inRef) {}
+        ~ValueGuardPtr() { if( ref ) *ref = old; }
+};
+
+template< typename T >
+struct ValueGuardPtr< std::list< T > > {
+        std::list< T > old;
+        std::list< T >* ref;
+
+        ValueGuardPtr( std::list< T > * inRef) : old(), ref(inRef) {
+                if( ref ) { swap( *ref, old ); }
+        }
+        ~ValueGuardPtr() { if( ref ) { swap( *ref, old ); } }
 };