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120 lines
2.3 KiB
120 lines
2.3 KiB
/*
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* Copyright (c) 2017 - present Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import <Foundation/NSString.h>
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int* __nullable returnsNull();
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@interface T : NSObject
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- (NSObject* _Nullable)nullableMethod;
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@end
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@implementation T {
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int* unnanotatedField;
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int* __nullable nullableField;
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int* nonnullField;
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}
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- (void)assignNullableFieldToNullOkay {
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nullableField = nil;
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}
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- (void)assignUnnanotatedFieldToNullBad {
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unnanotatedField = nil;
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}
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- (void)assignNonnullFieldToNullBad {
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nonnullField = nil;
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}
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- (void)testNullableFieldForNullOkay {
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if (nullableField == nil) {
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}
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}
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- (void)testUnnanotatedFieldForNullBad {
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if (unnanotatedField == nil) {
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}
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}
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- (int)DeadStoreFP_testUnnanotatedFieldInClosureBad {
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int (^testField)(int defaultValue);
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testField = ^(int defaultValue) {
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if (unnanotatedField != nil) {
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return *unnanotatedField;
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} else {
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return defaultValue;
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}
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};
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return testField(42);
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}
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- (void)testNonnullFieldForNullBad {
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if (nonnullField == nil) {
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}
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}
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- (void)dereferenceUnnanotatedFieldOkay {
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*unnanotatedField = 42;
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}
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- (void)dereferenceNonnullFieldOkay {
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*nonnullField = 42;
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}
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- (void)dereferenceNullableFieldBad {
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*nullableField = 42;
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}
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- (void)dereferenceUnnanotatedFieldAfterTestForNullBad {
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if (unnanotatedField == nil) {
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*unnanotatedField = 42;
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}
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}
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- (void)FP_dereferenceNonnullFieldAfterTestForNullOkay {
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if (nonnullField == nil) {
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*nonnullField = 42;
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}
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}
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- (void)dereferenceNullableFunctionBad {
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int* p = returnsNull();
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*p = 42;
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}
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- (void)dereferenceNullableFunction1Ok {
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int* p = returnsNull();
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if (p) {
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*p = 42;
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}
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}
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- (void)dereferenceNullableFunction2Ok {
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int* p = returnsNull();
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if (p != nil) {
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*p = 42;
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}
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}
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- (NSObject* _Nullable)nullableMethod {
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return nil;
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}
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- (NSString*)dereferenceNullableMethodOkay {
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NSObject* object = [self nullableMethod];
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return [object description]; // does not report here
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}
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- (void)reassigningNullableObjectOkay {
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NSObject* object = [self nullableMethod];
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object = nil; // does not report here
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}
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@end
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