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| author | Herbert Valerio Riedel <hvr@gnu.org> | 2018-11-10 01:12:52 +0100 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2019-03-22 10:34:51 -0400 |
| commit | ab51bee40c82cd552bcf13e24b67d43f3b8d25f3 (patch) | |
| tree | a75a4102576dad50af44e342fb9152e7270792eb /testsuite/tests/simplCore/should_compile/T8331.hs | |
| parent | cd07086ada34888c08585f4dc98a961618748ed0 (diff) | |
| download | haskell-ab51bee40c82cd552bcf13e24b67d43f3b8d25f3.tar.gz | |
base: Remove `Monad(fail)` method and reexport `MonadFail(fail)` instead
As per https://prime.haskell.org/wiki/Libraries/Proposals/MonadFail
Coauthored-by: Ben Gamari <ben@well-typed.com>
Diffstat (limited to 'testsuite/tests/simplCore/should_compile/T8331.hs')
| -rw-r--r-- | testsuite/tests/simplCore/should_compile/T8331.hs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/testsuite/tests/simplCore/should_compile/T8331.hs b/testsuite/tests/simplCore/should_compile/T8331.hs index 04cb1aff73..a7dc318826 100644 --- a/testsuite/tests/simplCore/should_compile/T8331.hs +++ b/testsuite/tests/simplCore/should_compile/T8331.hs @@ -23,6 +23,8 @@ 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) mapReaderT :: (m a -> n b) -> ReaderT r m a -> ReaderT r n b |