Re: Proposal to deprecate and then drop fromJust

And I did it myself, as it was about adding one single line rule: https://github.com/ndmitchell/hlint/pull/115 https://github.com/ndmitchell/hlint/pull/115 Let’s see what Neil thinks about :) - Oleg

On 24 Feb 2015, at 12:28, Oleg Grenrus wrote:

...

On 24 Feb 2015, at 12:23, Erik de Castro Lopo mailto:mle+hs@mega-nerd.com> wrote:

Possibly what we need is a pragma to mark functions partial and a warning flag that warns on usage of functions that have been marked partial.

I had this in mind too, but that is very heavy solution. I’d rather start with making hlint warnings?

foo :: Maybe Int -> Int foo x = if isJust x then fromJust x else 0

bar :: Maybe Int -> Int bar x = 1 + fromJust x

It warns about `foo` nonsense. It could propose to change `bar` part into `fromMaybe (error “I’know what I’m doing”) x` ?

- Oleg

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