Use adapted bounds for method/constructor type arguments - #1850
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Pull request overview
This PR updates the Checker Framework’s method-invocation type argument checking to use viewpoint-adapted bounds for method type parameters, and adds a viewpoint test to exercise both explicit and inferred method type arguments against those adapted bounds.
Changes:
- Add
AnnotatedTypeFactory.methodTypeVariablesFromUse(...)to compute method type-parameter bounds in the invocation’s viewpoint. - Use the new adapted-bounds helper from
BaseTypeVisitor.visitMethodInvocation(...)when validating method type arguments. - Add a new viewpoint test covering explicit and inferred method type arguments with receiver-dependent bounds.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| framework/tests/viewpointtest/MethodTypeVariableBounds.java | New test cases for receiver-dependent method type parameter bounds under different receiver viewpoints. |
| framework/src/main/java/org/checkerframework/framework/type/AnnotatedTypeFactory.java | Introduces a helper to compute invocation-viewpoint-adapted method type parameter bounds. |
| framework/src/main/java/org/checkerframework/common/basetype/BaseTypeVisitor.java | Switches method invocation type-argument checking to use adapted bounds from the factory helper. |
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aosen-xiong
commented
Jul 6, 2026
AnnotatedTypeCopierWithReplacement skips executable type parameters, so adapted method/constructor type-variable bounds were discarded and inference still saw unadapted declaration bounds. Install the adapted declarations, drop the redundant post-check re-adaptation helper, and add constructor coverage.
wmdietl
requested changes
Jul 16, 2026
…dings (eisop#1886) Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
wmdietl
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Aug 5, 2026
The viewpoint test checker obtained method type parameter bounds through AnnotatedTypeFactory#methodTypeVariablesFromUse, which fetched the raw bounds and then viewpoint-adapted them itself. "Use adapted bounds for method/constructor type arguments" (eisop#1850) performs that adaptation in AbstractViewpointAdapter#viewpointAdaptMethod and #viewpointAdaptConstructor, so the framework method duplicated it. Remove methodTypeVariablesFromUse and its BaseTypeVisitor call site, which restores the master implementation, and read the already-adapted bounds from methodFromUse and constructorFromUse. Constructor invocations are now checked as well; previously only method invocations reported viewpointtest.lost.in.bounds. Update the expectations in the tests added by eisop#1850, and delete ViewpointAdaptationBounds.java, whose cases those tests cover. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Split from #1173.
Use viewpoint-adapted method type parameter bounds when checking method invocation type arguments.
Adds a viewpoint test covering explicit and inferred type arguments.