1 /* 2 * Copyright 2020 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.Nullable; 18 import org.jspecify.annotations.NullnessUnspecified; 19 20 @NullMarked 21 class InstanceOfCheck { x0(Object o)22 Object x0(Object o) { 23 if (o instanceof Foo) { 24 return o; 25 } else { 26 return o; 27 } 28 } 29 x1(@ullnessUnspecified Object o)30 Object x1(@NullnessUnspecified Object o) { 31 if (o instanceof Foo) { 32 return o; 33 } else { 34 // jspecify_nullness_not_enough_information 35 return o; 36 } 37 } 38 x2(@ullable Object o)39 Object x2(@Nullable Object o) { 40 if (o instanceof Foo) { 41 return o; 42 } else { 43 // jspecify_nullness_mismatch 44 return o; 45 } 46 } 47 48 class Foo {} 49 } 50