diff options
Diffstat (limited to 'src/compiler/GF/Infra/UseIO.hs')
| -rw-r--r-- | src/compiler/GF/Infra/UseIO.hs | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/compiler/GF/Infra/UseIO.hs b/src/compiler/GF/Infra/UseIO.hs index e27b6e075..4c5a26d32 100644 --- a/src/compiler/GF/Infra/UseIO.hs +++ b/src/compiler/GF/Infra/UseIO.hs @@ -159,6 +159,9 @@ instance ErrorMonad IO where then h (ioeGetErrorString e) else ioError e {- +-- Control.Monad.Fail import will become redundant in GHC 8.8+ +import qualified Control.Monad.Fail as Fail + instance Functor IOE where fmap = liftM instance Applicative IOE where @@ -170,7 +173,15 @@ instance Monad IOE where IOE c >>= f = IOE $ do x <- c -- Err a appIOE $ err raise f x -- f :: a -> IOE a + + #if !(MIN_VERSION_base(4,13,0)) + fail = raise + #endif + +instance Fail.MonadFail IOE where fail = raise + + -} -- | Print the error message and return a default value if the IO operation 'fail's |
