reflect: insert xo/ subdir into include path

include/xo/reflect/atomic/AtomicTdx.hpp

@@ -0,0 +1,37 @@
+/* @file AtomicTdx.hpp */
+
+#pragma once
+
+#include "xo/reflect/TypeDescrExtra.hpp"
+//#include "reflect/TaggedPtr.hpp"
+#include <memory>
+
+namespace xo {
+  namespace reflect {
+    class TaggedPtr;
+
+    /* Extra type-associated information for an atomic type.
+     * We use this as degenerate catch-all case for types that aren't known
+     * to have additional structure (std::vector, std::map, int*, etc.)
+     */
+    class AtomicTdx : public TypeDescrExtra {
+    public:
+      virtual ~AtomicTdx() = default;
+
+      static std::unique_ptr<AtomicTdx> make();
+
+      // ----- Inherited from TypeDescrExtra -----
+
+      virtual Metatype metatype() const override { return Metatype::mt_atomic; }
+      virtual uint32_t n_child(void * /*object*/) const override { return 0; }
+      virtual TaggedPtr child_tp(uint32_t /*i*/, void * /*object*/) const override;
+      virtual std::string const & struct_member_name(uint32_t i) const override;
+      //virtual StructMember const * struct_member(uint32_t /*i*/) const override { return nullptr; }
+
+    private:
+      AtomicTdx() = default;
+    }; /*TypeDescrExtra*/
+  } /*namespace reflect*/
+} /*namespace xo*/
+
+/* end AtomicTdx.hpp */