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-rw-r--r--docs/virtual-machine-specification.org7
1 files changed, 4 insertions, 3 deletions
diff --git a/docs/virtual-machine-specification.org b/docs/virtual-machine-specification.org
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+++ b/docs/virtual-machine-specification.org
@@ -131,9 +131,10 @@ whole or not at all.
Specified, not yet implemented; each grows admission or planning
without changing admitted semantics:
-- constraint propagation: residuated constraints today wait and
- return; a store that actively narrows domains and detects
- unsatisfiable residue early is the next strength;
+- richer propagation: the interval store today reads domains and
+ one-sided comparisons; difference constraints between variables,
+ arithmetic relations, and propagation through record structure
+ are the next strengths;
- symbolic discharge: algebraic evidence for universals over
infinite domains, and arithmetic decrease measures for recursion
that structural containment cannot see;