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| author | Joey Hess <joeyh@joeyh.name> | 2016-03-25 15:28:31 -0400 |
|---|---|---|
| committer | Joey Hess <joeyh@joeyh.name> | 2016-03-25 15:28:31 -0400 |
| commit | 1edce2b72614e2e8eceefde97436db024799ff20 (patch) | |
| tree | bee36dec11710fae9cb93fe6d6f7e32293f26e01 /src/Propellor/EnsureProperty.hs | |
| parent | 9768434f5fa2f2ed0bbb0212763a76471186a3cd (diff) | |
ported Property.Apt
Diffstat (limited to 'src/Propellor/EnsureProperty.hs')
| -rw-r--r-- | src/Propellor/EnsureProperty.hs | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/src/Propellor/EnsureProperty.hs b/src/Propellor/EnsureProperty.hs index 21f8acce..c4b5fde1 100644 --- a/src/Propellor/EnsureProperty.hs +++ b/src/Propellor/EnsureProperty.hs @@ -7,7 +7,7 @@ module Propellor.EnsureProperty ( ensureProperty , property' - , OuterMetaTypes + , OuterMetaTypes(..) ) where import Propellor.Types @@ -33,8 +33,8 @@ import Propellor.Exception -- with the property to be lost. ensureProperty :: - ( (Targets inner `NotSuperset` Targets outer) ~ 'CanCombine - , CannotUse_ensureProperty_WithInfo inner ~ 'True + ( Cannot_ensureProperty_WithInfo inner ~ 'True + , (Targets inner `NotSuperset` Targets outer) ~ 'CanCombine ) => OuterMetaTypes outer -> Property (MetaTypes inner) @@ -42,10 +42,10 @@ ensureProperty ensureProperty _ = catchPropellor . getSatisfy -- The name of this was chosen to make type errors a more understandable. -type family CannotUse_ensureProperty_WithInfo (l :: [a]) :: Bool -type instance CannotUse_ensureProperty_WithInfo '[] = 'True -type instance CannotUse_ensureProperty_WithInfo (t ': ts) = - Not (t `EqT` 'WithInfo) && CannotUse_ensureProperty_WithInfo ts +type family Cannot_ensureProperty_WithInfo (l :: [a]) :: Bool +type instance Cannot_ensureProperty_WithInfo '[] = 'True +type instance Cannot_ensureProperty_WithInfo (t ': ts) = + Not (t `EqT` 'WithInfo) && Cannot_ensureProperty_WithInfo ts -- | Constructs a property, like `property`, but provides its -- `OuterMetaTypes`. |