schuderer / picograd

Attempt to reproduce Andrej Karpathy's migrograd auto differentiation engine in C++

picograd

Attempt to reproduce Andrej Karpathy's migrograd auto differentiation engine in C++.

I am an absolute newbie at C++, so please do not use this code for anything important. :)

Value is the user-facing class (meant for being used as a stack object by the user). There's a hidden Node graph behind it (every Value has an underlying Node), and Nodes can live on if referenced from other nodes in the graph. std::shared_ptr seems to work nicely here and there don't seem to be any memory management issues (Famous last words. You can tell that I still have a novice's confidence.).

This being a template class, I was torn about file structure. Currently, the last line of picograd/value.h imports picograd/value.hpp. In Qt Creator, this causes cyclic import warnings. If these annoy you, pasting the contents of value.hpp at the spot of the import and removing its own import of value.h should fix it.