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Only clean when the annotated type mirror is type variable #787

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Only clean when the annotated type mirror is type variable #787

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49a799d
Only clean when the annotated type mirror is type variable
Ao-senXiong Jun 19, 2024
280e8aa
Add error message on NoExplicitAnnotations test case
Ao-senXiong Jun 20, 2024
b5fc573
Empty commit for CI
Ao-senXiong Jun 20, 2024
1d7beaa
Merge branch 'master' into clearAnnotation-only-typevar
Ao-senXiong Sep 4, 2024
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1 change: 1 addition & 0 deletions checker/tests/stubparser-nullness/NoExplicitAnnotations.java
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,7 @@ void use(
NoExplicitAnnotationsSub2 sub2,
NoExplicitAnnotationsSub3 sub3) {
nble = sub1.method1();
// :: error: (assignment.type.incompatible)
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Can you provide a reason why this new error is desirable? Why is this change in behavior an improvement?

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Also note that a wilcard jtreg test fails.

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@Ao-senXiong Ao-senXiong Jun 21, 2024 •
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Can you provide a reason why this new error is desirable? Why is this change in behavior an improvement?

Because nn is @Nonnull and method1() is @Nullable. So there should be an assignment incompatiable error.

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But method1 is in the stub file without annotations.
Shouldn't the logic be that, if something appears in the stub-file, those annotations are used. If there are no annotations in the stub-file, the usual defaults are used.
That's at least what the current behavior seems to be. This makes the stub-files readable and understandable without looking at what the corresponding source says.

nn = sub1.method1();
nble = sub2.method2();
nn = sub2.method2();
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4 changes: 3 additions & 1 deletion framework/src/main/java/org/checkerframework/framework/stub/AnnotationFileParser.java
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Expand Up @@ -1521,7 +1521,9 @@ private void clearAnnotations(AnnotatedTypeMirror atype, Type typeDef) {
*/
// Clear existing annotations, which only makes a difference for
// type variables, but doesn't hurt in other cases.
atype.clearAnnotations();
if (atype.getKind() == TypeKind.TYPEVAR) {
atype.clearAnnotations();
}
}

/**
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