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But unfortunately that's where most libraries have issues. Ideed, if you look closely at fp-ts or lodash pipe implementations you'll see that typescript support has a limited function count support. For fp-ts, after 19 composed functions, you'll have no more type checking. For lodash, it's even worse, only 9 functions are supported. This is because these libraries are using typescript function overload definition instead of recursive typescript definitions.
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This is advanced typescript for library authors. By adding this kind of type definition you can improve your type definitions for advanced functionnal code. I'd like to emphasize that typescript type system is Turing complete, so if you think some advanced typing is impossible to do with typescript, you should think twice. Because chances are that you can. It might not be easy and i hope Typescript will improve on this part.
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