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by s3cur3 2339 days ago
Erlang's type checker Dialyzer has an Elixir wrapper called Dialyxir (https://github.com/jeremyjh/dialyxir). As someone coming from C++, Dialyzer leaves a lot to be desired—I still miss C++ type checking—but it's better than nothing.

The Norm library (https://github.com/keathley/norm) is an attempt at higher-level, more expressive type checking which I think shows a lot of promise, but I've not adopted it in a real project yet.