8000 Can instantiate a generic type without type argument · Issue #3768 · sorbet/sorbet · GitHub
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Can instantiate a generic type without type argument #3768

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Morriar opened this issue Dec 8, 2020 · 1 comment
Open

Can instantiate a generic type without type argument #3768

Morriar opened this issue Dec 8, 2020 · 1 comment
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@Morriar
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Morriar commented Dec 8, 2020 •
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Input

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# typed: strict

class A
  extend T::Generic

  E = type_member
end

A.new # No error? A should require type argument like `A[Foo]`

Observed output

No errors! Great job.

Sorbet treats this as A[T.untyped]

Expected behavior

I would expect Sorbet to raise an error saying A is a generic type and requires a type argument like A[Foo].
@Morriar Morriar added bug Something isn't working unconfirmed This issue has not yet been confirmed by the Sorbet team labels Dec 8, 2020
@Morriar Morriar removed the unconfirmed This issue has not yet been confirmed by the Sorbet team label Apr 30, 2021
@jez jez added this to the Generics milestone Aug 14, 2022
@jez jez mentioned this issue Feb 16, 2023
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@Tom-Bonnike
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Tom-Bonnike commented May 6, 2025 •
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+1, # typed: strong also doesn’t raise any error for usages of these untyped generic classes.

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