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Typechecking should take eta-equality on types into account #3285

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janmasrovira opened this issue Jan 17, 2025 · 0 comments
Open

Typechecking should take eta-equality on types into account #3285

janmasrovira opened this issue Jan 17, 2025 · 0 comments
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bug enhancement New feature or request pending-review typechecking

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@janmasrovira
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To reproduce clone and run juvix typecheck:
https://github.com/anoma/anoma-applib/tree/jan/type-checking-bug

Extract of the error message:

 mkReader {S} {M} ask local has type:
  Reader StandardInputs (StateT PRNG (ReaderT StandardInputs Mtl.Identity))
but is expected to have type:
  Reader StandardInputs λ! {A := StateT PRNG (ReaderT StandardInputs Mtl.Identity) A}

It should be possible to unify these two types by the eta-reduction law.
@lukaszcz lukaszcz changed the title Typechecking bug related to type equality Typechecking should take eta-equality on types into account Feb 3, 2025
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bug enhancement New feature or request pending-review typechecking
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@janmasrovira