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Introduce Throws typeclass #5

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chshersh opened this issue Mar 20, 2021 · 0 comments
Open

Introduce Throws typeclass #5

chshersh opened this issue Mar 20, 2021 · 0 comments
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enhancement New feature or request

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@chshersh
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Currently, we need to specify list of exceptions precisely. But the order of exceptions in the list doesn't actually matter. So the following two actions are the same, but they won't typecheck to each other:

foo :: EIO '[ E1, E2 ] Int
bar :: EIO '[ E2, E1 ] Int

This is usually handled by typeclasses:

foo :: Throws e '[ E1, E2 ] => EIO e Int
@chshersh chshersh added the enhancement New feature or request label Mar 20, 2021
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@chshersh