github/semantic
1
1
Fork 0
mirror of https://github.com/github/semantic.git synced 2024-12-23 23:11:50 +03:00
Code Issues Projects Releases Wiki Activity

Add a default implementation for crosswalk.

Browse Source
This commit is contained in:
Rob Rix 2016-03-10 13:15:48 -05:00
parent 64baf04a31
commit 35024d02cf
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/Data/Align.hs
View File

@ -18,6 +18,8 @@ instance Align [] where
class Functor t => Crosswalk t where
crosswalk :: Align f => (a -> f b) -> t a -> f (t b)
crosswalk f = sequenceL . fmap f
sequenceL :: Align f => t (f a) -> f (t a)
sequenceL = crosswalk id