Greetings: I have made some changes into my sandbox and I am happy to say some tests send by Steven a while ago are now working correctly. The interface was previously supporting only allocations made by "new_sh". I was aware of this but now I am adding a solution to make shifted_ptr generic enough. The solution is still a non-portable one but will be corrected shortly; it consists of detecting the stack frame and I am using gcc's __builtin_frame_address(). I also replaced Nedmalloc for Boost.Pool because I temporarily wish to reduce problems I might face. The problem with Boost.Pool is that it doesn't handle arbitrary sized chunks and the complexity goes down to O(n) for array allocations. All in all shifted_ptr behaves differently when a pointer resides either on the: 1. stack & data segment 2. local heap 3. system heap Moreover the test file shifted_ptr_test3.cpp which uses BOOST_TEST macros is crashing on gcc for Windows. The same tests appears in shifted_ptr_test2.cpp and work correctly. Finally yes I definitely need to write documentation about this but I will basically need to write something similar to a book. For now I just want to present a working example and here it is. The ultimate objective of shifted_ptr is to handle neural networks for artificial intelligence testings so feel free using the pointer in your tests to help me finding flaws that might still exist. Regards, -Phil