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| author |  Benjamin Barenblat <bbaren@mit.edu> | 2015-12-23 16:01:51 -0500 |
|---|---|---|
| committer | Benjamin Barenblat <bbaren@mit.edu> | 2015-12-23 16:01:51 -0500 |
| commit | 3d3886672433f0775f772d8d2ee47c5f5e0bc745 (patch) | |
| tree | 072d171c17d92a6696024256c4b2f5aaa760df35 /src/list_key_fn.sml | |
| parent | bf037ce78c2c76a34ecca0fb8bafa5d5be38968a (diff) | |
| parent | 4be7962adf740a35222bfd99608c04329a802a04 (diff) | |
Merge branch 'upstream' into dfsg_clean20151220+dfsg
Diffstat (limited to 'src/list_key_fn.sml')
| -rw-r--r-- | src/list_key_fn.sml | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/list_key_fn.sml b/src/list_key_fn.sml new file mode 100644 index 00000000..ec2bd26f --- /dev/null +++ b/src/list_key_fn.sml @@ -0,0 +1,14 @@ +functor ListKeyFn(K : ORD_KEY) + : ORD_KEY where type ord_key = K.ord_key list = struct + +type ord_key = K.ord_key list + +val rec compare = + fn ([], []) => EQUAL + | ([], _) => LESS + | (_, []) => GREATER + | (x::xs, y::ys) => case K.compare (x, y) of + EQUAL => compare (xs, ys) + | ord => ord + +end |