From 9ff99799ea7a41450fc33fbe4923d3bdc4cf20fa Mon Sep 17 00:00:00 2001
From: Omar Shrit <omar@shrit.me>
Date: Thu, 18 Jun 2020 20:29:04 +0200
Subject: [PATCH] Another tests that I have done by changing the
 pointer_wrapper

Only you have to change name to do tests

Signed-off-by: Omar Shrit <omar@shrit.me>
---
 .../core/cereal/pointer_wrapper_test.hpp      | 83 +++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 src/mlpack/core/cereal/pointer_wrapper_test.hpp

diff --git a/src/mlpack/core/cereal/pointer_wrapper_test.hpp b/src/mlpack/core/cereal/pointer_wrapper_test.hpp
new file mode 100644
index 0000000000..430754b88c
--- /dev/null
+++ b/src/mlpack/core/cereal/pointer_wrapper_test.hpp
@@ -0,0 +1,83 @@
+#ifndef CEREAL_PONTER_WRAPPER_HPP
+#define CEREAL_PONTER_WRAPPER_HPP
+
+/*
+ * The objective of this class is to create a wrapper for
+ * raw pointer by encapsulating them in a smart pointer unique_ptr
+ * This will allow to serialize raw pointer in cereal as a smart pointer
+ * because it will be difficult to change all pointer type in mlpack
+ */
+
+#include <cereal/archives/binary.hpp>
+#include <cereal/archives/json.hpp>
+#include <cereal/archives/portable_binary.hpp>
+#include <cereal/archives/xml.hpp>
+#include <cereal/types/memory.hpp>
+
+namespace cereal {
+
+template<class T>
+class pointer_wrapper
+{
+public:
+  pointer_wrapper(T*& pointer)
+    : localPointer(&pointer)
+  {
+     std::cout << "address of  pointer" << &pointer << std::endl;
+     std::cout << "address of  pointer" << *localPointer << std::endl;
+     std::cout << "address saved by localPointer: " << localPointer << std::endl;
+     if (pointer == nullptr) {
+      *localPointer = new T();
+      std::cout << "address pointed by the pointer" << pointer << std::endl;
+    }
+
+  }
+
+  template<class Archive>
+  void save(Archive& ar, const unsigned int /*version*/) const
+  {
+    std::unique_ptr<T> smartPointer = std::make_unique<T>(*this->localPointer);
+    ar(CEREAL_NVP(smartPointer));
+  }
+
+  template<class Archive>
+  void load(Archive& ar, const unsigned int /*version*/)
+  {
+    std::unique_ptr<T> smartPointer;
+    ar(CEREAL_NVP(smartPointer));
+
+    moved_pointer = std::move(smartPointer);
+
+    std::cout << "The value of localPointer is : " << *moved_pointer
+              << std::endl;
+    auto p = *moved_pointer;
+    std::cout << "p" << p << std::endl;
+    release_pointer();
+  }
+
+  void release_pointer()
+  {
+   std::cout << "The addresss of pointed by localpointer : "
+              << this->localPointer << std::endl; 
+    //   double i =100;
+    **localPointer = 27;
+    std::cout << "The value for d should be: "
+              << **this->localPointer << std::endl;
+  }
+
+private:
+  T** localPointer;
+  std::unique_ptr<T> moved_pointer;
+};
+
+template<class T>
+inline pointer_wrapper<T>
+make_pointer(T* t)
+{
+  pointer_wrapper<T> a(t);
+  return a;
+}
+
+} // end namespace cereal
+
+#endif // CEREAL_POINTER_WRAPPER_HPP