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datalog: dl-saturated? fixpoint predicate (212/212)
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Returns true iff one more saturation step would derive no new
tuples. Walks every rule under the current bindings and short-
circuits as soon as one derivation would add a fresh tuple.
Useful in tests that want to assert "no work left" after a call,
or for tooling that wants to know whether `dl-saturate!` would
do anything.

3 new eval tests cover the after-saturation, before-saturation,
and after-assert states.
This commit is contained in:
giles
2026-05-08 10:15:29 +00:00
parent 43fa31375d
commit fc6979a371
4 changed files with 60 additions and 6 deletions
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lib/datalog/scoreboard.md
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@@ -1,13 +1,13 @@
# datalog scoreboard
**209 / 209 passing** (0 failure(s)).
**212 / 212 passing** (0 failure(s)).
| Suite | Passed | Total | Status |
|-------|--------|-------|--------|
| tokenize | 26 | 26 | ok |
| parse | 18 | 18 | ok |
| unify | 28 | 28 | ok |
| eval | 25 | 25 | ok |
| eval | 28 | 28 | ok |
| builtins | 19 | 19 | ok |
| semi_naive | 8 | 8 | ok |
| negation | 10 | 10 | ok |