Progress.

include/hdk/grid/PrimitiveWrapper.hpp

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+#pragma once
+/// @file PrimitiveWrapper.hpp
+/// For complete documentation, see src/PrimitiveWrapper.cpp
+//
+namespace hdk::grid {
+  template <typename T>
+  class PrimitiveWrapper {
+    private:
+      T primitive_value;
+    public:
+      PrimitiveWrapper() = delete;
+      PrimitiveWrapper(T value) : primitive_value(value) {}
+      operator T() const { return primitive_value; }
+      PrimitiveWrapper& operator=(T newValue) {
+        primitive_value = newValue;
+        return *this;
+      }
+  };
+}