From 7268253f5ae4b4883d28faa87b3e63295f04abfd Mon Sep 17 00:00:00 2001 From: Andreas Källberg Date: Sat, 5 Sep 2020 20:23:07 +0200 Subject: MonadFail: Make backwards-compatible --- src/compiler/GF/Infra/SIO.hs | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'src/compiler/GF/Infra/SIO.hs') diff --git a/src/compiler/GF/Infra/SIO.hs b/src/compiler/GF/Infra/SIO.hs index 2cb6d1ccd..0ce431380 100644 --- a/src/compiler/GF/Infra/SIO.hs +++ b/src/compiler/GF/Infra/SIO.hs @@ -42,6 +42,7 @@ import qualified GF.Command.Importing as GF(importGrammar, importSource) #ifdef C_RUNTIME import qualified PGF2 #endif +import qualified Control.Monad.Fail as Fail -- * The SIO monad @@ -58,7 +59,7 @@ instance Monad SIO where return x = SIO (const (return x)) SIO m1 >>= xm2 = SIO $ \ h -> m1 h >>= \ x -> unS (xm2 x) h -instance MonadFail SIO where +instance Fail.MonadFail SIO where fail = liftSIO . fail instance Output SIO where -- cgit v1.2.3