github/semantic
1
1
Fork 0
mirror of https://github.com/github/semantic.git synced 2024-12-21 05:41:54 +03:00
Code Issues Projects Releases Wiki Activity

Revert "Revert "Define a Crosswalk instance for Patch.""

Browse Source 
This reverts commit 20d96850fa7ee2b1ad3c949b128186eaa8f22f6b.
This commit is contained in:
Rob Rix 2017-05-11 14:19:34 -04:00
parent 344bff67ce
commit 4ef3604a65
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/Patch.hs
View File

@ -16,6 +16,7 @@ module Patch
, patchType
) where
import Data.Align
import Data.Functor.Listable
import Data.These
import Prologue
@ -90,3 +91,8 @@ instance Listable1 Patch where
instance Listable a => Listable (Patch a) where
tiers = tiers1
instance Crosswalk Patch where
crosswalk f (Replace a b) = alignWith (these Delete Insert Replace) (f a) (f b)
crosswalk f (Insert b) = Insert <$> f b
crosswalk f (Delete a) = Delete <$> f a