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68 lines
1.3 KiB
68 lines
1.3 KiB
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import <Foundation/NSObject.h>
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#include <memory>
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@interface SomeObject : NSObject
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@property int x;
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@property std::shared_ptr<int> ptr;
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- (int)returnsPOD;
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- (std::shared_ptr<int>)returnsnonPOD;
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@end
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@implementation SomeObject
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- (int)returnsPOD {
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return _x;
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}
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- (std::shared_ptr<int>)returnsnonPOD {
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return std::shared_ptr<int>(new int(_x));
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}
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@end
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int dereferenceNilBad() {
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int* int_ptr = nil;
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return *int_ptr;
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}
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int FP_testCallMethodReturnsPODOk() {
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SomeObject* obj = nil;
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return [obj returnsPOD];
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}
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std::shared_ptr<int> testCallMethodReturnsnonPODBad() {
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SomeObject* obj = nil;
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std::shared_ptr<int> d = [obj returnsnonPOD]; // UB
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return d;
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}
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int FP_testAccessPropertyAccessorOk() {
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SomeObject* obj = nil;
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return obj.x; // calls property accessor method
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}
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std::shared_ptr<int> testAccessPropertyAccessorBad() {
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SomeObject* obj = nil;
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return obj.ptr; // calls property accessor method, but return type is non-POD
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}
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int methodReturnsPOD(SomeObject* obj) { return [obj returnsPOD]; };
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int FP_methodReturnsPODNilOk() { return methodReturnsPOD(nil); };
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int methodReturnsPODNotNilOK() {
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SomeObject* o = [SomeObject new];
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return methodReturnsPOD(o);
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}
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