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Diffstat (limited to 'src/Propellor/Property/List.hs')
| -rw-r--r-- | src/Propellor/Property/List.hs | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/src/Propellor/Property/List.hs b/src/Propellor/Property/List.hs index 283c5ec7..a88d44d7 100644 --- a/src/Propellor/Property/List.hs +++ b/src/Propellor/Property/List.hs @@ -2,6 +2,7 @@ {-# LANGUAGE FlexibleInstances #-} module Propellor.Property.List ( + props, PropertyList(..), PropertyListType, ) where @@ -12,6 +13,22 @@ import Propellor.PropAccum import Data.Monoid +-- | Starts accumulating a list of properties. +-- +-- > propertyList "foo" $ props +-- > & someproperty +-- > ! oldproperty +-- > & otherproperty +props :: PropList +props = PropList [] + +data PropList = PropList [Property HasInfo] + +instance PropAccum PropList where + PropList l `addProp` p = PropList (toProp p : l) + PropList l `addPropFront` p = PropList (l ++ [toProp p]) + getProperties (PropList l) = reverse l + class PropertyList l where -- | Combines a list of properties, resulting in a single property -- that when run will run each property in the list in turn, @@ -21,12 +38,7 @@ class PropertyList l where -- Note that Property HasInfo and Property NoInfo are not the same -- type, and so cannot be mixed in a list. To make a list of -- mixed types, which can also include RevertableProperty, - -- use `props`: - -- - -- > propertyList "foo" $ props - -- > & someproperty - -- > ! oldproperty - -- > & otherproperty + -- use `props` propertyList :: Desc -> l -> Property (PropertyListType l) -- | Combines a list of properties, resulting in one property that |