summaryrefslogtreecommitdiff
path: root/Propellor/Property.hs
diff options
context:
space:
mode:
Diffstat (limited to 'Propellor/Property.hs')
-rw-r--r--Propellor/Property.hs5
1 files changed, 5 insertions, 0 deletions
diff --git a/Propellor/Property.hs b/Propellor/Property.hs
index 29f6bb80..e7ec704d 100644
--- a/Propellor/Property.hs
+++ b/Propellor/Property.hs
@@ -88,3 +88,8 @@ props = []
(&) :: IsProp p => [Property] -> p -> [Property]
ps & p = ps ++ [toProp p]
infixl 1 &
+
+-- | Adds a property to the list in reverted form.
+(!) :: [Property] -> RevertableProperty -> [Property]
+ps ! p = ps ++ [toProp $ revert p]
+infixl 1 !