Refactor top-level function to generate vulkan.hpp

snippets/DispatchLoaderBase.hpp

@@ -0,0 +1,22 @@
+  class DispatchLoaderBase
+  {
+  public:
+    DispatchLoaderBase() = default;
+    DispatchLoaderBase( std::nullptr_t )
+#if !defined( NDEBUG )
+      : m_valid( false )
+#endif
+    {}
+
+#if !defined( NDEBUG )
+    size_t getVkHeaderVersion() const
+    {
+      VULKAN_HPP_ASSERT( m_valid );
+      return vkHeaderVersion;
+    }
+
+  private:
+    size_t vkHeaderVersion = VK_HEADER_VERSION;
+    bool   m_valid         = true;
+#endif
+  };