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The canonical Datalog idiom for "no X has any Y": orphan(X) :- person(X), not(parent(X, _)). was rejected by the safety check with "negation refers to unbound variable(s) (\"_anon1\")". The parser renames each anonymous `_` to a fresh `_anon*` symbol so multiple `_` occurrences don't unify with each other, and the negation safety walk then demanded all free vars in the negated lit be bound by an earlier positive body lit — including the renamed anonymous vars. Anonymous vars in a negation are existentially quantified within the negation, not requirements from outside. Added dl-non-anon-vars to strip `_anon*` names from the `needed` set before the binding check in dl-process-neg!. Real vars (like `X` in the orphan idiom) still must be bound by an earlier positive body lit, just as before. 2 new regression tests (orphan idiom + multi-anon "solo" pattern); conformance 273/273. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
21 lines
775 B
JSON
21 lines
775 B
JSON
{
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"lang": "datalog",
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"total_passed": 273,
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"total_failed": 0,
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"total": 273,
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"suites": [
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{"name":"tokenize","passed":31,"failed":0,"total":31},
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{"name":"parse","passed":23,"failed":0,"total":23},
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{"name":"unify","passed":29,"failed":0,"total":29},
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{"name":"eval","passed":42,"failed":0,"total":42},
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{"name":"builtins","passed":26,"failed":0,"total":26},
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{"name":"semi_naive","passed":8,"failed":0,"total":8},
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{"name":"negation","passed":12,"failed":0,"total":12},
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{"name":"aggregates","passed":23,"failed":0,"total":23},
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{"name":"api","passed":22,"failed":0,"total":22},
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{"name":"magic","passed":36,"failed":0,"total":36},
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{"name":"demo","passed":21,"failed":0,"total":21}
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],
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"generated": "2026-05-11T08:49:02+00:00"
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}
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