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| author | Joe Zhao <ztuowen@gmail.com> | 2015-08-24 15:45:45 -0600 |
|---|---|---|
| committer | Joe Zhao <ztuowen@gmail.com> | 2015-08-24 15:45:45 -0600 |
| commit | 6588473adf96a3eb7cfac55820ec022d4533fcbf (patch) | |
| tree | dcc6d21e7ce8ed368eda73a7fd74eca5340355ed /monadTrans/h2.hs | |
| parent | 3cf3e36b1498271f3c9162576809d886482e6d97 (diff) | |
| download | typeclass-master.tar.gz typeclass-master.tar.bz2 typeclass-master.zip | |
Diffstat (limited to 'monadTrans/h2.hs')
| -rw-r--r-- | monadTrans/h2.hs | 4 |
1 files changed, 4 insertions, 0 deletions
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) |