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December 11, 2015 01:48
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A simple script to demonstrate the unfortunate importance of goal ordering in `core.logic`.
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| (use `clojure.core.logic) | |
| ;; Runs quickly. Prints (1 2,3). | |
| (clojure.pprint/pprint (run* [q] (fresh [x] (== x [1,2,3]) | |
| (membero q x)))) | |
| ;; Hangs | |
| (clojure.pprint/pprint (run* [q] (fresh [x] (membero q x) | |
| (== x [1,2,3])))) |
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