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Validate return types correctly. #4844

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merged 3 commits into from Jul 29, 2021
Merged

Validate return types correctly. #4844

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272c49e
Validate return types correctly.
smillst Jul 28, 2021
0aa0793
Use class name.
smillst Jul 29, 2021
51450a7
Merge remote-tracking branch 'origin/master' into validate-return
smillst Jul 29, 2021
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2 changes: 1 addition & 1 deletion checker/tests/nullness/Issue1027.java
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Expand Up @@ -19,7 +19,7 @@ class Repr<T> {
void bar(Function<T, String> p) {}
}

@SuppressWarnings("nullness")
@SuppressWarnings({"nullness", "keyfor"})
Repr<@KeyFor("this") String> foo() {
return null;
}
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2 changes: 1 addition & 1 deletion checker/tests/nullness/java8inference/Issue1084.java
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Expand Up @@ -7,7 +7,7 @@ class MyOpt<T extends Object> {
static <S> MyOpt<@NonNull S> empty() {
throw new RuntimeException();
}

// :: error: (type.argument)
static <S> MyOpt<S> of(S p) {
throw new RuntimeException();
}
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9 changes: 9 additions & 0 deletions framework/src/main/java/org/checkerframework/common/basetype/BaseTypeValidator.java
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Expand Up @@ -4,6 +4,7 @@
import com.sun.source.tree.ClassTree;
import com.sun.source.tree.ExpressionTree;
import com.sun.source.tree.IdentifierTree;
import com.sun.source.tree.MethodTree;
import com.sun.source.tree.NewClassTree;
import com.sun.source.tree.ParameterizedTypeTree;
import com.sun.source.tree.Tree;
Expand Down Expand Up @@ -471,6 +472,14 @@ protected void visitTypeParameterBounds(
case TYPE_PARAMETER:
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The Javadoc for the containing method twice says "type parameter tree" and once says "parameter type tree". Please make them consistent.

// Nothing to do.
break;
case METHOD:
// If a MethodTree is passed, it's just the return type that is validated.
// See BaseTypeVisitor#validateTypeOf.
MethodTree methodTree = (MethodTree) tree;
if (methodTree.getReturnType() instanceof ParameterizedTypeTree) {
typeargtree = (ParameterizedTypeTree) methodTree.getReturnType();
}
break;
default:
// The parameterized type is the result of some expression tree.
// No need to do anything further.
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