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> Maybe the most powerful of any fully statically typed language?

Compared to Haskell, Ocaml, Scala, F#, ...? Writing it like a dynamically typed language is standard for full type inference.

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Those functional languages don't have function overloading or named arguments. The type inference in Crystal works very differently. The type of a method can only be computed from explicit calls to it. In those functional languages the type can be computed independent of a call because it's trivial to do so if a function name always refers to a single entity.

> Those functional languages don't have function overloading or named arguments.

Scala has both, F# too (though function overloading is possible, I think it's not idiomatic), OCaml has named arguments, Haskell has overloading.

I should have qualified that statement with OO languages, not functional. Also see asterite's reply, he would know much better than me, as I believe he's one of the core Crystal developers.

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