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Type Inference Zoo

zoo.cuichen.cc

160 pointsmpweiher5 comments

It is crazy how much work comes out of Bruno Oliveira’s research groups.

Another cool online thing that exists is CP, a language with disjoint intersection and union types:

TypeScript has this functionality.

Additionally, Scala 3 does as well, including support for these generic "Type-Lambda" expressions I saw in one of the examples on the playground:

https://beta.plground.org/jnclma/CP_tutorial

  printNum = trait implements ExpSig<Eval => Print> {

In Scala 3, this would be roughly:

  trait ExpSig[F[_]]
  object printNum extends ExpSig[[A] =>> Eval[A] => Print]

https://docs.scala-lang.org/scala3/reference/new-types/type-...

This is amazing. I've been wanting to do this for ages (even tried a few times and failed a few times). Great to see this.

huh funny how python's doing the job of modeling type systems when it barely enforces types itself. but makes sense the more u poke around. didn't have to fight any compiler layer or deal with noise. could just build the inference logic raw, decide how types get unified, how ctx gets stored, all that. no annotations or weird conversions. the language just stepped aside so i could focus. actually helped my brain map the theory better ngl

>uh funny how python's doing the job of modeling type systems when it barely enforces types itself

The magic of computers. You can write a standards-compliant Lisp interpreter in python, too and it doesn't have a large chunk of that stuff in itself either.

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