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fused-effects-exceptions
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No need for a runM.

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Patrick Thomson 2019-10-31 15:40:29 -04:00
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@ -9,7 +9,7 @@ This package provides `Control.Effect.Exception`, a module that wraps the [`Cont
Please be aware that injudicious use of these functions may provoke surprising interactions with carriers that thread a monadic state as a parameter, à la the `Control.Carrier.State` types provided by `fused-effects`. For example, a function like `finally`, which does not thread any state from its body to its handler block, may discard state writes in cleanup handlers: Please be aware that injudicious use of these functions may provoke surprising interactions with carriers that thread a monadic state as a parameter, à la the `Control.Carrier.State` types provided by `fused-effects`. For example, a function like `finally`, which does not thread any state from its body to its handler block, may discard state writes in cleanup handlers:
```haskell ```haskell
λ runM (runState 'a' ((throwIO (userError "urk") `finally` put @Char 'z') λ run (runState 'a' ((throwIO (userError "urk") `finally` put @Char 'z')
`catch` (\(_ :: IOException) -> pure ()))) `catch` (\(_ :: IOException) -> pure ())))
('a', ()) ('a', ())
``` ```