diff options
Diffstat (limited to 'src/Utils')
| -rw-r--r-- | src/Utils/Either.hs | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/Utils/Either.hs b/src/Utils/Either.hs new file mode 100644 index 0000000..5d62dcc --- /dev/null +++ b/src/Utils/Either.hs @@ -0,0 +1,7 @@ +module Utils.Either + ( mapLeft + ) where + +mapLeft :: (a -> c) -> Either a b -> Either c b +mapLeft f (Left l) = Left (f l) +mapLeft _ (Right r) = (Right r) |