Fix constants in Xor #778
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Fix constants in Xor #778
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−3
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Looks good to me, waiting for the tests to finish. |
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I was a bit too quick with adding the trivially true/false cases in simplify_bool. Can probably do with a re-review |
ThomSerg
approved these changes
Nov 6, 2025
| elif lb == 1 == ub: | ||
| self.assertEqual(cp.Model(expr).solveAll(), total_vals) | ||
| else: | ||
| self.assertNotEqual(cp.Model(expr).solveAll(), total_vals) |
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use assertLess()?
What with assertMore(..., 0)?
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Some changes to how we handle constants in Xor, fixing both #620 and #747
Trivially true comparisons are now simplified away during
simplify_bool, and we cannsimplify_boolon the decomposition of Xor.This is not needed for any other global constraint, as it is the only one that takes Boolean arguments.
(Actually also IfThenElse does, but it's decomposition uses
impliesconstraints, and the simplifications are built-in to that constructor)