warn-redundant-constraints present as errors

[Konstantine Rybnikov]

On a slightly unrelated note I should say it would be great to have errors
contain word "Error:". This is especially nice to have because when you
build with "-j" your error that stops compilation gets lost somewhere in
the middle of many warnings (which my projects have, unfortunately).

On Thu, Jan 8, 2015 at 11:45 PM, Alan & Kim Zimmerman <alan.zimm at gmail.com>
wrote:

> This is a great feature, here is some feedback
>
> My syntax highlighter in emacs expects warnings to have the word "warning"
> in them.
>
> So for the two warnings reported below, the first is highlighted as an
> error, and the second as a warning
>
>
> Language/Haskell/Refact/Utils/TypeUtils.hs:3036:17:
>     Redundant constraint: SYB.Data t
>     In the type signature for:
>        duplicateDecl :: SYB.Data t =>
>                         [GHC.LHsBind GHC.Name]
>                         -> t -> GHC.Name -> GHC.Name -> RefactGhc
> [GHC.LHsBind GHC.Name]
>
> Language/Haskell/Refact/Utils/TypeUtils.hs:3045:7: Warning:
>     Defined but not used: ‘toks
>
>
> This is in a ghci session, and the file loads without problems, so it is
> indeed a warning.
>
> Can we perhaps add the word "Warning" to the output for Redundant
> constraints?
>
> I also had a situation where it asked me to remove a whole lot of
> constraints from different functions, I did them in batches, so did not
> remove them all from the file at once, and at some point I had to add at
> least one of them back, albeit based on an error message.
>
>
> Regards
>   Alan
>
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