diff options
Diffstat (limited to 'monadTrans')
| -rw-r--r-- | monadTrans/h1.hs | 2 | ||||
| -rw-r--r-- | monadTrans/h2.hs | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/monadTrans/h1.hs b/monadTrans/h1.hs new file mode 100644 index 0000000..0127e8c --- /dev/null +++ b/monadTrans/h1.hs @@ -0,0 +1,2 @@ +-- Kind of t in MonadTrans t +(* -> *) -> * -> * diff --git a/monadTrans/h2.hs b/monadTrans/h2.hs new file mode 100644 index 0000000..b74c1e1 --- /dev/null +++ b/monadTrans/h2.hs @@ -0,0 +1,4 @@ +-- Implement join :: M (N (M (N a))) -> M (N a), given distrib :: N (M a) -> M (N a) and assuming M and N are instances +-- of Monad. + +join a = fmap join (join $ fmap distrib a) |