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Diffstat (limited to 'testsuite/tests/perf/compiler/T3064.hs')
| -rw-r--r-- | testsuite/tests/perf/compiler/T3064.hs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/testsuite/tests/perf/compiler/T3064.hs b/testsuite/tests/perf/compiler/T3064.hs index dacca79296..e29dd95564 100644 --- a/testsuite/tests/perf/compiler/T3064.hs +++ b/testsuite/tests/perf/compiler/T3064.hs @@ -19,6 +19,8 @@ instance (Monad m) => Monad (ReaderT r m) where m >>= k = ReaderT $ \r -> do a <- runReaderT m r runReaderT (k a) r + +instance (MonadFail m) => MonadFail (ReaderT r m) where fail msg = ReaderT $ \_ -> fail msg newtype ResourceT r s m v = ResourceT { unResourceT :: ReaderT r m v } |