/*
 * Copyright 2022 The JSpecify Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import org.jspecify.nullness.NullMarked;
import org.jspecify.nullness.Nullable;
import org.jspecify.nullness.NullnessUnspecified;

@NullMarked
interface WildcardBoundWithAnnotations {
  <T> void use(Supplier<? extends T> s, Lib<T> l);

  <T> void useUnspec(Supplier<? extends @NullnessUnspecified T> s, Lib<T> l);

  <T> void useUnionNull(Supplier<? extends @Nullable T> s, Lib<T> l);

  default <T> void x0(Supplier<? extends T> s, Lib<T> l) {
    use(s, l);
    useUnspec(s, l);
    useUnionNull(s, l);
  }

  default <T> void x1(Supplier<? extends @NullnessUnspecified T> s, Lib<T> l) {
    // jspecify_nullness_not_enough_information
    use(s, l);
    // jspecify_nullness_not_enough_information
    useUnspec(s, l);
    useUnionNull(s, l);
  }

  default <T> void x2(Supplier<? extends @Nullable T> s, Lib<T> l) {
    // jspecify_nullness_mismatch
    use(s, l);
    // jspecify_nullness_not_enough_information
    useUnspec(s, l);
    useUnionNull(s, l);
  }

  interface Supplier<T extends @Nullable Object> {}

  interface Lib<T> {}
}

Add a sample inspired by a mis-annotated Guava API that our prototype missed.
Add a sample inspired by a mis-annotated Guava API that our prototype missed.

https://github.com/google/guava/blob/156694066b5198740a820c6eef723fb86c054343/guava/src/com/google/common/base/FunctionalEquivalence.java#L41

...has `? extends T`, but its caller...

https://github.com/google/guava/blob/156694066b5198740a820c6eef723fb86c054343/guava/src/com/google/common/base/Equivalence.java#L157

...has `? extends @Nullable T`.

That shouldn't be allowed: Both should have `? extends @Nullable T`.

(It's possible that the extra `Lib` parameter in this sample isn't
necessary. I added it while debugging a mistake of mine (specifically, a
missing bound on the type parameter of `Supplier`), and I didn't try
later to remove it.)
