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

xo-object/src/object/Boolean.cpp

@@ -0,0 +1,52 @@
+/* @file Boolean.cpp
+ *
+ * author: Roland Conybeare, Aug 2025
+ */
+
+#include "Boolean.hpp"
+#include <array>
+#include <cassert>
+#include <cstddef>
+
+namespace xo {
+    namespace obj {
+        gp<Boolean>
+        Boolean::boolean_obj(bool x)
+        {
+            static std::array<gp<Boolean>, 2> s_boolean_v
+                = {{ new Boolean{false}, new Boolean{true} }};
+
+            return s_boolean_v[static_cast<std::size_t>(x)];
+        }
+
+        std::size_t
+        Boolean::_shallow_size() const
+        {
+            return sizeof(Boolean);
+        }
+
+        Object *
+        Boolean::_shallow_copy() const
+        {
+            /* Boolean instances not created in GC-owned space,
+             * so GC will not traverse them.
+             *
+             * If we wanted booleans in GC-owned space, would need
+             * to pad Boolean::value_ with enough space to hold a forwarding
+             * pointer
+             */
+
+            assert(false);
+            return nullptr;
+        }
+
+        std::size_t
+        Boolean::_forward_children()
+        {
+            assert(false);
+            return 0;
+        }
+    }
+} /*namespace xo*/
+
+/* end Boolean.cpp */