File: test12.elpi

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elpi 2.0.7-3
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:functional
pred p i:int, o:int.

/* this slightly differs from test11.elpi since 
 * we explicitly put the uvar keyword in place of a unification variable
 * the input mode will therefore prevent the query `p 1 Y` to unify with 
 * `p uvar 3.
 */
p 1 2.
p uvar 3.

main.