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comparison src/pair_key_fn.sml @ 2277:6bce459ca581

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Add new files missing from previous commit.
author Ziv Scully <ziv@mit.edu>
date Mon, 09 Nov 2015 13:38:04 -0500
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2276:c05f9a5e0f0f 2277:6bce459ca581
1 functor PairKeyFn (structure I : ORD_KEY
2 structure J : ORD_KEY)
3 : ORD_KEY where type ord_key = I.ord_key * J.ord_key = struct
4
5 type ord_key = I.ord_key * J.ord_key
6
7 fun compare ((i1, j1), (i2, j2)) =
8 case I.compare (i1, i2) of
9 EQUAL => J.compare (j1, j2)
10 | ord => ord
11
12 end