Torch : Hacking with C APIs

Checkout this section: https://pytorch.org/cppdocs/

In addition to the C++ frontend contained in csrc/api/include , torch supports

1. ATen/ATen.h
2. torch/csrc/autograd/variable.h torch/csrc/autograd/variable.h
3. torchscript (explore later)
4. C++ extensions (explore later)

The C++ frontend APIs are not required to be understood for working with Python bindings(as I suppose). It just abstracts the C++ functionalities offered by Pytorch.