282 lines
14 KiB
Objective-C
282 lines
14 KiB
Objective-C
// RUN: %clang_cc1 -fsyntax-only -fblocks -Woverriding-method-mismatch -Wno-nullability-declspec -Wnullable-to-nonnull-conversion %s -verify
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__attribute__((objc_root_class))
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@interface NSFoo
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- (void)methodTakingIntPtr:(_Nonnull int *)ptr;
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- (_Nonnull int *)methodReturningIntPtr;
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@end
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// Nullability applies to all pointer types.
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typedef NSFoo * _Nonnull nonnull_NSFoo_ptr;
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typedef id _Nonnull nonnull_id;
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typedef SEL _Nonnull nonnull_SEL;
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// Nullability can move into Objective-C pointer types.
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typedef _Nonnull NSFoo * nonnull_NSFoo_ptr_2;
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// Conflicts from nullability moving into Objective-C pointer type.
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typedef _Nonnull NSFoo * _Nullable conflict_NSFoo_ptr_2; // expected-error{{'_Nonnull' cannot be applied to non-pointer type 'NSFoo'}}
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void testBlocksPrinting(NSFoo * _Nullable (^bp)(int)) {
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int *ip = bp; // expected-error{{'NSFoo * _Nullable (^)(int)'}}
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}
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// Check returning nil from a _Nonnull-returning method.
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@implementation NSFoo
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- (void)methodTakingIntPtr:(_Nonnull int *)ptr { }
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- (_Nonnull int *)methodReturningIntPtr {
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return 0; // no warning
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}
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@end
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// Context-sensitive keywords and property attributes for nullability.
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__attribute__((objc_root_class))
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@interface NSBar
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- (nonnull NSFoo *)methodWithFoo:(nonnull NSFoo *)foo;
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- (nonnull NSFoo **)invalidMethod1; // expected-error{{nullability keyword 'nonnull' cannot be applied to multi-level pointer type 'NSFoo **'}}
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// expected-note@-1{{use nullability type specifier '_Nonnull' to affect the innermost pointer type of 'NSFoo **'}}
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- (nonnull NSFoo * _Nullable)conflictingMethod1; // expected-error{{nullability specifier '_Nullable' conflicts with existing specifier '_Nonnull'}}
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- (nonnull NSFoo * _Nonnull)redundantMethod1; // expected-warning{{duplicate nullability specifier '_Nonnull'}}
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@property(nonnull,retain) NSFoo *property1;
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@property(nullable,assign) NSFoo ** invalidProperty1; // expected-error{{nullability keyword 'nullable' cannot be applied to multi-level pointer type 'NSFoo **'}}
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// expected-note@-1{{use nullability type specifier '_Nullable' to affect the innermost pointer type of 'NSFoo **'}}
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@property(null_unspecified,retain) NSFoo * _Nullable conflictingProperty1; // expected-error{{nullability specifier '_Nullable' conflicts with existing specifier '_Null_unspecified'}}
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@property(retain,nonnull) NSFoo * _Nonnull redundantProperty1; // expected-warning{{duplicate nullability specifier '_Nonnull'}}
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@property(null_unspecified,retain,nullable) NSFoo *conflictingProperty3; // expected-error{{nullability specifier 'nullable' conflicts with existing specifier 'null_unspecified'}}
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@property(nullable,retain,nullable) NSFoo *redundantProperty3; // expected-warning{{duplicate nullability specifier 'nullable'}}
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@end
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@interface NSBar ()
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@property(nonnull,retain) NSFoo *property2;
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@property(nullable,assign) NSFoo ** invalidProperty2; // expected-error{{nullability keyword 'nullable' cannot be applied to multi-level pointer type 'NSFoo **'}}
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// expected-note@-1{{use nullability type specifier '_Nullable' to affect the innermost pointer type of 'NSFoo **'}}
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@property(null_unspecified,retain) NSFoo * _Nullable conflictingProperty2; // expected-error{{nullability specifier '_Nullable' conflicts with existing specifier '_Null_unspecified'}}
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@property(retain,nonnull) NSFoo * _Nonnull redundantProperty2; // expected-warning{{duplicate nullability specifier '_Nonnull'}}
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@end
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void test_accepts_nonnull_null_pointer_literal(NSFoo *foo, _Nonnull NSBar *bar) {
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[foo methodTakingIntPtr: 0]; // expected-warning{{null passed to a callee that requires a non-null argument}}
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[bar methodWithFoo: 0]; // expected-warning{{null passed to a callee that requires a non-null argument}}
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bar.property1 = 0; // expected-warning{{null passed to a callee that requires a non-null argument}}
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bar.property2 = 0; // expected-warning{{null passed to a callee that requires a non-null argument}}
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[bar setProperty1: 0]; // expected-warning{{null passed to a callee that requires a non-null argument}}
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[bar setProperty2: 0]; // expected-warning{{null passed to a callee that requires a non-null argument}}
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int *ptr = bar.property1; // expected-warning{{incompatible pointer types initializing 'int *' with an expression of type 'NSFoo * _Nonnull'}}
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}
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// Check returning nil from a nonnull-returning method.
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@implementation NSBar
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- (nonnull NSFoo *)methodWithFoo:(nonnull NSFoo *)foo {
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return 0; // no warning
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}
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- (NSFoo **)invalidMethod1 {
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return 0;
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}
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- (NSFoo *)conflictingMethod1 {
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return 0; // no warning
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}
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- (NSFoo *)redundantMethod1 {
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int *ip = 0;
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return ip; // expected-warning{{result type 'NSFoo * _Nonnull'}}
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}
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@end
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__attribute__((objc_root_class))
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@interface NSMerge
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- (nonnull NSFoo *)methodA:(nonnull NSFoo*)foo;
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- (nonnull NSFoo *)methodB:(nonnull NSFoo*)foo;
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- (NSFoo *)methodC:(NSFoo*)foo;
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@end
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@implementation NSMerge
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- (NSFoo *)methodA:(NSFoo*)foo {
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int *ptr = foo; // expected-warning{{incompatible pointer types initializing 'int *' with an expression of type 'NSFoo * _Nonnull'}}
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return ptr; // expected-warning{{result type 'NSFoo * _Nonnull'}}
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}
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- (nullable NSFoo *)methodB:(null_unspecified NSFoo*)foo { // expected-error{{nullability specifier 'nullable' conflicts with existing specifier 'nonnull'}} \
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// expected-error{{nullability specifier 'null_unspecified' conflicts with existing specifier 'nonnull'}}
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return 0;
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}
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- (nonnull NSFoo *)methodC:(nullable NSFoo*)foo {
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int *ip = 0;
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return ip; // expected-warning{{result type 'NSFoo * _Nonnull'}}
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}
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@end
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// Checking merging of nullability when sending a message.
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@interface NSMergeReceiver
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- (id)returnsNone;
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- (nonnull id)returnsNonNull;
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- (nullable id)returnsNullable;
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- (null_unspecified id)returnsNullUnspecified;
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@end
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void test_receiver_merge(NSMergeReceiver *none,
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_Nonnull NSMergeReceiver *nonnull,
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_Nullable NSMergeReceiver *nullable,
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_Null_unspecified NSMergeReceiver *null_unspecified) {
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int *ptr;
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ptr = [nullable returnsNullable]; // expected-warning{{'id _Nullable'}}
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ptr = [nullable returnsNullUnspecified]; // expected-warning{{'id _Nullable'}}
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ptr = [nullable returnsNonNull]; // expected-warning{{'id _Nullable'}}
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ptr = [nullable returnsNone]; // expected-warning{{'id _Nullable'}}
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ptr = [null_unspecified returnsNullable]; // expected-warning{{'id _Nullable'}}
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ptr = [null_unspecified returnsNullUnspecified]; // expected-warning{{'id _Null_unspecified'}}
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ptr = [null_unspecified returnsNonNull]; // expected-warning{{'id _Null_unspecified'}}
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ptr = [null_unspecified returnsNone]; // expected-warning{{'id'}}
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ptr = [nonnull returnsNullable]; // expected-warning{{'id _Nullable'}}
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ptr = [nonnull returnsNullUnspecified]; // expected-warning{{'id _Null_unspecified'}}
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ptr = [nonnull returnsNonNull]; // expected-warning{{'id _Nonnull'}}
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ptr = [nonnull returnsNone]; // expected-warning{{'id'}}
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ptr = [none returnsNullable]; // expected-warning{{'id _Nullable'}}
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ptr = [none returnsNullUnspecified]; // expected-warning{{'id'}}
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ptr = [none returnsNonNull]; // expected-warning{{'id'}}
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ptr = [none returnsNone]; // expected-warning{{'id'}}
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}
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// instancetype
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@protocol Initializable
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- (instancetype)initWithBlah:(id)blah;
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@end
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__attribute__((objc_root_class))
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@interface InitializableClass <Initializable>
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- (nonnull instancetype)initWithBlah:(nonnull id)blah;
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- (nullable instancetype)returnMe;
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+ (nullable instancetype)returnInstanceOfMe;
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- (nonnull instancetype _Nullable)initWithBlah2:(nonnull id)blah; // expected-error {{nullability specifier '_Nullable' conflicts with existing specifier '_Nonnull'}}
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- (instancetype _Nullable)returnMe2;
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+ (_Nonnull instancetype)returnInstanceOfMe2;
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@end
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void test_instancetype(InitializableClass * _Nonnull ic, id _Nonnull object) {
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int *ip = [ic returnMe]; // expected-warning{{incompatible pointer types initializing 'int *' with an expression of type 'InitializableClass * _Nullable'}}
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ip = [InitializableClass returnMe]; // expected-warning{{incompatible pointer types assigning to 'int *' from 'id _Nullable'}}
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ip = [InitializableClass returnInstanceOfMe]; // expected-warning{{incompatible pointer types assigning to 'int *' from 'InitializableClass * _Nullable'}}
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ip = [object returnMe]; // expected-warning{{incompatible pointer types assigning to 'int *' from 'id _Nullable'}}
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ip = [ic returnMe2]; // expected-warning{{incompatible pointer types assigning to 'int *' from 'InitializableClass * _Nullable'}}
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ip = [InitializableClass returnInstanceOfMe2]; // expected-warning{{incompatible pointer types assigning to 'int *' from 'InitializableClass * _Nonnull'}}
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}
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// Check null_resettable getters/setters.
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__attribute__((objc_root_class))
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@interface NSResettable
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@property(null_resettable,retain) NSResettable *resettable1; // expected-note{{passing argument to parameter 'resettable1' here}}
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@property(null_resettable,retain,nonatomic) NSResettable *resettable2;
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@property(null_resettable,retain,nonatomic) NSResettable *resettable3;
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@property(null_resettable,retain,nonatomic) NSResettable *resettable4;
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@property(null_resettable,retain,nonatomic) NSResettable *resettable5;
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@property(null_resettable,retain,nonatomic) NSResettable *resettable6;
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@end
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void test_null_resettable(NSResettable *r, int *ip) {
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[r setResettable1:ip]; // expected-warning{{incompatible pointer types sending 'int *' to parameter of type 'NSResettable * _Nullable'}}
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r.resettable1 = ip; // expected-warning{{incompatible pointer types assigning to 'NSResettable * _Nullable' from 'int *'}}
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}
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@implementation NSResettable // expected-warning{{synthesized setter 'setResettable4:' for null_resettable property 'resettable4' does not handle nil}}
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- (NSResettable *)resettable1 {
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int *ip = 0;
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return ip; // expected-warning{{result type 'NSResettable * _Nonnull'}}
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}
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- (void)setResettable1:(NSResettable *)param {
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}
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@synthesize resettable2; // no warning; not synthesized
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@synthesize resettable3; // expected-warning{{synthesized setter 'setResettable3:' for null_resettable property 'resettable3' does not handle nil}}
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- (void)setResettable2:(NSResettable *)param {
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}
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@dynamic resettable5;
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- (NSResettable *)resettable6 {
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return 0; // no warning
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}
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@end
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// rdar://problem/19814852
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@interface MultiProp
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@property (nullable, copy) id a, b, c;
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@property (nullable, copy) MultiProp *d, *(^e)(int);
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@end
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void testMultiProp(MultiProp *foo) {
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int *ip;
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ip = foo.a; // expected-warning{{from 'id _Nullable'}}
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ip = foo.d; // expected-warning{{from 'MultiProp * _Nullable'}}
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ip = foo.e; // expected-error{{incompatible type 'MultiProp *(^ _Nullable)(int)'}}
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}
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void testBlockLiterals() {
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(void)(^id(void) { return 0; });
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(void)(^id _Nullable (void) { return 0; });
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(void)(^ _Nullable id(void) { return 0; });
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int *x = (^ _Nullable id(void) { return 0; })(); // expected-warning{{incompatible pointer types initializing 'int *' with an expression of type 'id _Nullable'}}
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}
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// Check nullability of conditional expressions.
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void conditional_expr(int c) {
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NSFoo * _Nonnull p;
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NSFoo * _Nonnull nonnullP;
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NSFoo * _Nullable nullableP;
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NSFoo * _Null_unspecified unspecifiedP;
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NSFoo *noneP;
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p = c ? nonnullP : nonnullP;
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p = c ? nonnullP : nullableP; // expected-warning{{implicit conversion from nullable pointer 'NSFoo * _Nullable' to non-nullable pointer type 'NSFoo * _Nonnull'}}
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p = c ? nonnullP : unspecifiedP;
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p = c ? nonnullP : noneP;
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p = c ? nullableP : nonnullP; // expected-warning{{implicit conversion from nullable pointer 'NSFoo * _Nullable' to non-nullable pointer type 'NSFoo * _Nonnull'}}
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p = c ? nullableP : nullableP; // expected-warning{{implicit conversion from nullable pointer 'NSFoo * _Nullable' to non-nullable pointer type 'NSFoo * _Nonnull'}}
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p = c ? nullableP : unspecifiedP; // expected-warning{{implicit conversion from nullable pointer 'NSFoo * _Nullable' to non-nullable pointer type 'NSFoo * _Nonnull'}}
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p = c ? nullableP : noneP; // expected-warning{{implicit conversion from nullable pointer 'NSFoo * _Nullable' to non-nullable pointer type 'NSFoo * _Nonnull'}}
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p = c ? unspecifiedP : nonnullP;
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p = c ? unspecifiedP : nullableP; // expected-warning{{implicit conversion from nullable pointer 'NSFoo * _Nullable' to non-nullable pointer type 'NSFoo * _Nonnull'}}
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p = c ? unspecifiedP : unspecifiedP;
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p = c ? unspecifiedP : noneP;
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p = c ? noneP : nonnullP;
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p = c ? noneP : nullableP; // expected-warning{{implicit conversion from nullable pointer 'NSFoo * _Nullable' to non-nullable pointer type 'NSFoo * _Nonnull'}}
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p = c ? noneP : unspecifiedP;
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p = c ? noneP : noneP;
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}
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typedef int INTS[4];
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@interface ArraysInMethods
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- (void)simple:(int [_Nonnull 2])x;
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- (void)nested:(void *_Nullable [_Nonnull 2])x;
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- (void)nestedBad:(int [2][_Nonnull 2])x; // expected-error {{nullability specifier '_Nonnull' cannot be applied to non-pointer type 'int [2]'}}
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- (void)withTypedef:(INTS _Nonnull)x;
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- (void)withTypedefBad:(INTS _Nonnull[2])x; // expected-error{{nullability specifier '_Nonnull' cannot be applied to non-pointer type 'INTS' (aka 'int [4]')}}
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- (void)simpleSugar:(nonnull int [2])x;
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- (void)nestedSugar:(nonnull void *_Nullable [2])x; // expected-error {{nullability keyword 'nonnull' cannot be applied to multi-level pointer type 'void * _Nullable [2]'}} expected-note {{use nullability type specifier '_Nonnull' to affect the innermost pointer type of 'void * _Nullable [2]'}}
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- (void)sugarWithTypedef:(nonnull INTS)x;
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@end
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void test(ArraysInMethods *obj) {
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[obj simple:0]; // expected-warning {{null passed to a callee that requires a non-null argument}}
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[obj nested:0]; // expected-warning {{null passed to a callee that requires a non-null argument}}
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[obj withTypedef:0]; // expected-warning {{null passed to a callee that requires a non-null argument}}
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[obj simpleSugar:0]; // expected-warning {{null passed to a callee that requires a non-null argument}}
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[obj sugarWithTypedef:0]; // expected-warning {{null passed to a callee that requires a non-null argument}}
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}
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