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authorJoey Hess2015-10-27 14:34:10 -0400
committerJoey Hess2015-10-27 14:37:02 -0400
commit56c3394144abbb9862dc67379d3253c76ae4df97 (patch)
tree7e643b1f938343f883f6379382440516e6d3a5db /src/Propellor/PropAccum.hs
parent77e3a5d4d968f3567b1b8e62996e0e6c803ab642 (diff)
Explicit Info/NoInfo for RevertableProperty (API change)
RevertableProperty used to be assumed to contain info, but this is now made explicit, with RevertableProperty HasInfo or RevertableProperty NoInfo. Transition guide: - If you define a RevertableProperty, expect some type check failures like: "Expecting one more argument to ‘RevertableProperty’". - Change it to "RevertableProperty NoInfo" - The compiler will then tell you if it needs "HasInfo" instead. - If you have code that uses the RevertableProperty constructor that fails to type check, use the more powerful <!> operator
Diffstat (limited to 'src/Propellor/PropAccum.hs')
-rw-r--r--src/Propellor/PropAccum.hs4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/Propellor/PropAccum.hs b/src/Propellor/PropAccum.hs
index 3c50cf32..85a30af5 100644
--- a/src/Propellor/PropAccum.hs
+++ b/src/Propellor/PropAccum.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE PackageImports #-}
+{-# LANGUAGE PackageImports, FlexibleContexts #-}
module Propellor.PropAccum
( host
@@ -46,7 +46,7 @@ class PropAccum h where
(&^) = addPropFront
-- | Adds a property in reverted form.
-(!) :: PropAccum h => h -> RevertableProperty -> h
+(!) :: IsProp (RevertableProperty i) => PropAccum h => h -> RevertableProperty i -> h
h ! p = h & revert p
infixl 1 &