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| author | Joey Hess <joeyh@joeyh.name> | 2016-11-11 17:29:11 -0400 |
|---|---|---|
| committer | Joey Hess <joeyh@joeyh.name> | 2016-11-11 17:29:25 -0400 |
| commit | c0d0e57257fe8dee1f9d37a6d49b6322af985a69 (patch) | |
| tree | be921c1ad45c42e6ed1c987fc51d6e9b7e013689 /src/Propellor/Info.hs | |
| parent | c24acf55af190bc332b29d0ef4a04dda9335b01a (diff) | |
Clean up build warnings about redundant constraints when built with ghc 8.0.
Only a couple of the constraints were really redundant. The rest are
essential to propellor's tracking of Info propigation, so I silenced the
warning for those.
It would be better to only silence the warning for the functions with the
extra constraints, but IIRC warnings can only be silenced on an entire file
basis.
This commit was sponsored by Andreas on Patreon.
Diffstat (limited to 'src/Propellor/Info.hs')
| -rw-r--r-- | src/Propellor/Info.hs | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/Propellor/Info.hs b/src/Propellor/Info.hs index e9218291..75f0b76a 100644 --- a/src/Propellor/Info.hs +++ b/src/Propellor/Info.hs @@ -1,4 +1,5 @@ {-# LANGUAGE PackageImports, TypeFamilies, DataKinds, PolyKinds #-} +{-# OPTIONS_GHC -fno-warn-redundant-constraints #-} module Propellor.Info ( osDebian, @@ -38,6 +39,9 @@ import Prelude -- -- The new Property will include HasInfo in its metatypes. setInfoProperty + -- -Wredundant-constraints is turned off because + -- this constraint appears redundant, but is actually + -- crucial. :: (MetaTypes metatypes' ~ (+) HasInfo metatypes, SingI metatypes') => Property metatypes -> Info @@ -47,6 +51,9 @@ setInfoProperty (Property _ d a oldi c) newi = -- | Adds more info to a Property that already HasInfo. addInfoProperty + -- -Wredundant-constraints is turned off because + -- this constraint appears redundant, but is actually + -- crucial. :: (IncludesInfo metatypes ~ 'True) => Property metatypes -> Info |