Changeset 134322e for src/Common/utility.h

Timestamp:

Jun 1, 2017, 4:26:50 PM (7 years ago)

Author:

Thierry Delisle <tdelisle@…>

Branches:

ADT, aaron-thesis, arm-eh, ast-experimental, cleanup-dtors, deferred_resn, demangler, enum, forall-pointer-decay, jacob/cs343-translation, jenkins-sandbox, master, new-ast, new-ast-unique-expr, new-env, no_list, persistent-indexer, pthread-emulation, qualifiedEnum, resolv-new, with_gc

Children:

676cc8c

Parents:

3fb9a83

Message:

Refactored PassVisitor? to properly support env and statements to add

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 ); } }
 };