xref: /aosp_15_r20/external/jspecify/samples/NullUnmarkedUndoesNullMarkedForWildcards.java (revision 2167191df2fa07300797f1ac5b707370b5f38c48)
1 /*
2  * Copyright 2023 The JSpecify Authors.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 import org.jspecify.annotations.NullMarked;
17 import org.jspecify.annotations.NullUnmarked;
18 import org.jspecify.annotations.Nullable;
19 
20 @NullMarked
21 interface NullUnmarkedUndoesNullMarkedForWildcards {
22   @NullUnmarked
apply(Supplier<?> supplier)23   default void apply(Supplier<?> supplier) {
24     // jspecify_nullness_not_enough_information
25     acceptObject(supplier.get());
26   }
27 
acceptObject(Object o)28   void acceptObject(Object o);
29 
30   interface Supplier<T extends @Nullable Object> {
get()31     T get();
32   }
33 }
34