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import java.io.*;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Set;
import org.checkerframework.checker.nullness.qual.*;
import org.checkerframework.dataflow.qual.*;
@org.checkerframework.framework.qual.DefaultQualifier(Nullable.class)
public class GenericArgs {
public @NonNull Set<@NonNull String> strings = new HashSet<>();
void test() {
@NonNull HashSet<@NonNull String> s = new HashSet<>();
strings.addAll(s);
strings.add("foo");
}
static class X<@NonNull T extends @NonNull Object> {
T value() {
// :: error: (return.type.incompatible)
return null;
}
}
public static void test2() {
// :: error: (type.argument.type.incompatible)
Object o = new X<Object>().value();
}
static <@NonNull Z extends @NonNull Object> void test3(Z z) {}
void test4() {
// :: error: (type.argument.type.incompatible)
GenericArgs.<@Nullable Object>test3(null);
// :: error: (argument.type.incompatible)
GenericArgs.<@NonNull Object>test3(null);
}
static class GenericConstructor {
<@NonNull T extends @NonNull Object> GenericConstructor(T t) {}
}
void test5() {
// :: error: (argument.type.incompatible)
new <@NonNull String>GenericConstructor(null);
}
void testRecursiveDeclarations() {
class MyComparator<@NonNull T extends @NonNull Comparable<T>>
implements Comparator<T @NonNull []> {
@Pure
public int compare(T[] a, T[] b) {
return 0;
}
}
Comparator<@NonNull String @NonNull []> temp = new MyComparator<@NonNull String>();
}
}
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