Dijitso provides a core component of the FEniCS framework, namely the just-in-time compilation of C++ code that is generated from Python modules. It is called from within a C++ library, using ctypes to import the dynamic shared library directly.

As long as the compiled code can provide a simple factory function to a class implementing a predefined C++ interface, there is no limit to the complexity of that interface. Parallel support depends on the mpi4py interface.