+ xo-alloc + xo-object + xo-alloc docs + GC utests

src/alloc/Forwarding1.cpp

@@ -0,0 +1,45 @@
+/* file Forwarding1.cpp
+ *
+ * author: Roland Conybeare, Aug 2025
+ */
+
+#include "Forwarding1.hpp"
+#include <cstddef>
+#include <cassert>
+
+namespace xo {
+    namespace obj {
+        Forwarding1::Forwarding1(gp<Object> dest)
+            : dest_{dest}
+        {}
+
+        Object *
+        Forwarding1::_offset_destination(Object * src) const
+        {
+            intptr_t offset = src - static_cast<const Object *>(this);
+
+            return dest_.ptr() + offset;
+        }
+
+        std::size_t
+        Forwarding1::_shallow_size() const {
+            assert(false);
+            return 0;
+        }
+
+        Object *
+        Forwarding1::_shallow_copy() const {
+            assert(false);
+            return nullptr;
+        }
+
+        std::size_t
+        Forwarding1::_forward_children() {
+            assert(false);
+            return 0;
+        }
+
+    } /*namespace obj*/
+} /*namespace xo*/
+
+/* end Forwarding1.cpp */