Re: [Haskell-cafe] incomplete-uni-patterns

Does this suppress the warning?: let ~[addr,port] = args and let ~(Just val) = mval Jeff

On Jan 25, 2023, at 4:05 PM, Kazu Yamamoto (山本和彦) via Haskell-Cafe wrote:

Hello,

The recent GHC added incomplete-uni-patterns to the -Wall option. So, we have a waning with the following code:

let [addr,port] = args

To avoid this, I changed the code to:

let addr = head args port = head $ tail args

In my opinion, this seems Lisp rather than Haskell.

Also, I need to avoid:

let Just val = mval

Rahter, I use:

let val = fromJust mval

This is annoying to me.

How do you get along with incomplete-uni-patterns? I would like to know the best current practice.

--Kazu

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