Inherited @SideEffectsOnly annotations - #8003
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smillst merged 16 commits intoAug 18, 2026
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After a call to a method annotated @SideEffectsOnly, discard only what the annotation's expressions could have changed, rather than every refinement. A checker discards what it knows about an expression `e` if `e` contains a listed expression, and also if `e` contains a call through whose receiver or arguments a listed expression is reachable: a @pure method's result depends on state that no annotation declares, so approximate that state by what is reachable from the call's receiver and arguments. If a listed expression cannot be represented at the call site -- because viewpoint adaptation yields an Unknown, or because it cannot be parsed -- then return null, which makes the caller discard every refinement. Omitting the expression instead would treat the method as side-effecting less than it was declared to. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
@SideEffectsOnly is not inherited as an annotation, because its `value` element is significant, unlike that of the other inherited declaration annotations. A method that overrides methods in two supertypes inherits the union of what they permit it to side-effect, rather than the "first one wins" rule of `addOrMerge`. Each expression is remembered along with the method that declares it, because the expression is parsed in that method's scope: an expression that names a field of the superclass might name a different field, or none at all, in the subclass. A @SideEffectsOnly written on the overriding method itself is authoritative, so in that case nothing is inherited. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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In `@checker/tests/sideeffectsonly/SideEffectsOnlyInherit.java`:
- Around line 44-56: Extend the side-effect inheritance tests by adding a field
absent from both supertypes, then update testF and testG to assert that this
unrelated field remains refined after receiver.m(c). Keep the existing f and g
assertions unchanged and use the same expected type-checking pattern.
In `@checker/tests/sideeffectsonly/SideEffectsOnlyOverride.java`:
- Around line 75-84: Add the test-harness marker for the unimplemented override
check to the assertion on variable y in testDynamicDispatch, indicating that
line 83 currently depends on the expected unsound refinement-retention behavior.
Keep the existing call and assertion unchanged apart from associating this
dependency with the TODO markers for the override check.
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📒 Files selected for processing (5)
checker/tests/sideeffectsonly/SideEffectsOnlyInherit.javachecker/tests/sideeffectsonly/SideEffectsOnlyInheritScope.javachecker/tests/sideeffectsonly/SideEffectsOnlyOverride.javaframework/src/main/java/org/checkerframework/framework/flow/CFAbstractAnalysis.javaframework/src/main/java/org/checkerframework/framework/type/AnnotatedTypeFactory.java
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Aug 18, 2026
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