Refactor top-level function to generate vulkan.hpp

snippets/Optional.hpp

@@ -0,0 +1,33 @@
+  template <typename RefType>
+  class Optional
+  {
+  public:
+    Optional( RefType & reference ) VULKAN_HPP_NOEXCEPT
+    {
+      m_ptr = &reference;
+    }
+    Optional( RefType * ptr ) VULKAN_HPP_NOEXCEPT
+    {
+      m_ptr = ptr;
+    }
+    Optional( std::nullptr_t ) VULKAN_HPP_NOEXCEPT
+    {
+      m_ptr = nullptr;
+    }
+
+    operator RefType *() const VULKAN_HPP_NOEXCEPT
+    {
+      return m_ptr;
+    }
+    RefType const * operator->() const VULKAN_HPP_NOEXCEPT
+    {
+      return m_ptr;
+    }
+    explicit operator bool() const VULKAN_HPP_NOEXCEPT
+    {
+      return !!m_ptr;
+    }
+
+  private:
+    RefType * m_ptr;
+  };