The project requires some interest into software design, especially
with smart pointers. Do you think this description fits you? If yes,
you could start already by refactoring the existing uses of the ISL C
function to use the existing isl-noexceptions.h C++ wrappers. Recent
examples: https://reviews.llvm.org/D97751 https://reviews.llvm.org/D99841. This would demonstrate your ability
to work on this project.