`case` statements in elm can not match variables. Both of these branches
look to the compiler as if they match everything. It interprets
`messageParam` as the name of a variable to which to bind the match, which
in this case will be `node.message`.
On Sun, Jul 9, 2017 at 5:04 PM jadski <jonathan@hotlink.technology> wrote:
> With manual formatting
>
> *Code*
>
> type Message = Good | Bad | ManyOthers
>
> type alias Node = { message : Message }
>
> trymatch : Node -> Message -> Bool
> trymatch node messageParam =
> case node.message of
> messageParam ->
> True
> _ ->
> False
>
> evalTrue = trymatch { message = Good } Good
> evalFalse = trymatch { message = Good } Bad
>
>
> *Error Message*
>
> The following pattern is redundant. Remove it.
>
> 10| _ ->
> ^
> Any value with this shape will be handled by a previous pattern.
>
>
>
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