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Set-theoretic types: type definitions #13881

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josevalim opened this issue Oct 6, 2024 · 0 comments
Open
12 tasks

Set-theoretic types: type definitions #13881

josevalim opened this issue Oct 6, 2024 · 0 comments
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App:Elixir (checker)

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josevalim commented Oct 6, 2024 •
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This refers to second and third milestones of Elixir's type system. It is a continuation of #13227 and can only be started once that is completed.

New constructs and APIs will be added to Elixir:

  • Define a construct for typed structs (field documentation, parametric definitions, private fields, deprecate empty structs)
  • Define a construct for type aliases
  • Define a construct for type signatures
  • Define a construct for typed behaviours
  • Define a construct for typed protocols (parametric protocols)
  • Define a construct for Erlang FFI

At the descr-level, we need to support:

  • Occurrence typing
  • Recursive types
  • Parametric polymorphism and local inference/partial application
  • Strong arrows
  • Row polymorphism
  • Behaviours
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