There are as many kinds of nulls as programming languages. Cixl [0] doesn't derive null from every other type, instead Nil and all other types derive Opt; which

There are as many kinds of nulls as programming languages. Cixl [0] doesn't derive null from every other type, instead Nil and all other types derive Opt; which means that user code may specify Opt to accept nulls or any other type to have nulls automatically trapped. [0] https://github.com/basic-gongfu/cixl#optionals https://github.com/basic-gongfu/cixl#optionals