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

xo-object/include/xo/object/Integer.hpp

@@ -0,0 +1,31 @@
+/* @file Integer.hpp
+ *
+ * author: Roland Conybeare, Aug 2025
+ */
+
+#include "Number.hpp"
+
+namespace xo {
+    namespace obj {
+        class Integer : public Number  {
+        public:
+            using int_type = long long;
+
+        public:
+            Integer() = default;
+            explicit Integer(int_type x);
+
+            static gp<Integer> make(int_type x);
+
+            // inherited from Object..
+            virtual std::size_t _shallow_size() const override;
+            virtual Object * _shallow_copy() const override;
+            virtual std::size_t _forward_children() override;
+
+        private:
+            int_type value_ = 0;
+        };
+    } /*namespace obj*/
+} /*namespace xo*/
+
+/* end Integer.hpp */