413 lines
15 KiB
Objective-C
413 lines
15 KiB
Objective-C
// RUN: %clang_cc1 -fblocks -fsyntax-only %s -verify -Wmethod-signatures
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// Tests Objective-C 'kindof' types.
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#if !__has_feature(objc_kindof)
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#error does not support __kindof
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#endif
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@protocol NSObject
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@end
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@protocol NSCopying
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- (id)copy;
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+ (Class)classCopy;
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@end
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@protocol NSRandomProto
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- (void)randomMethod;
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+ (void)randomClassMethod;
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@end
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__attribute__((objc_root_class))
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@interface NSObject <NSObject>
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- (NSObject *)retain;
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@end
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@interface NSString : NSObject <NSCopying> // expected-note{{receiver is instance of class declared here}}
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- (void)compare:(NSString *)string;
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- (NSString *)stringByAppendingString:(NSString *)string;
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+ (instancetype)string;
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@end
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@interface NSMutableString : NSString
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- (void)appendString:(NSString *)string;
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@end
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@interface NSNumber : NSObject <NSCopying>
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- (NSNumber *)numberByAddingNumber:(NSNumber *)number;
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@end
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// ---------------------------------------------------------------------------
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// Parsing and semantic analysis for __kindof
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// ---------------------------------------------------------------------------
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// Test proper application of __kindof.
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typedef __kindof NSObject *typedef1;
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typedef NSObject __kindof *typedef2;
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typedef __kindof NSObject<NSCopying> typedef3;
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typedef NSObject<NSCopying> __kindof *typedef4;
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typedef __kindof id<NSCopying> typedef5;
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typedef __kindof Class<NSCopying> typedef6;
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// Test redundancy of __kindof.
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typedef __kindof id __kindof redundant_typedef1;
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typedef __kindof NSObject __kindof *redundant_typedef2;
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// Test application of __kindof to typedefs.
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typedef NSObject *NSObject_ptr_typedef;
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typedef NSObject NSObject_typedef;
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typedef __kindof NSObject_ptr_typedef typedef_typedef1;
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typedef __kindof NSObject_typedef typedef_typedef2;
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// Test application of __kindof to non-object types.
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typedef __kindof int nonobject_typedef1; // expected-error{{'__kindof' specifier cannot be applied to non-object type 'int'}}
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typedef NSObject **NSObject_ptr_ptr;
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typedef __kindof NSObject_ptr_ptr nonobject_typedef2; // expected-error{{'__kindof' specifier cannot be applied to non-object type 'NSObject_ptr_ptr' (aka 'NSObject **')}}
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// Test application of __kindof outside of the decl-specifiers.
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typedef NSObject * __kindof bad_specifier_location1; // expected-error{{'__kindof' type specifier must precede the declarator}}
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typedef NSObject bad_specifier_location2 __kindof; // expected-error{{expected ';' after top level declarator}}
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// expected-warning@-1{{declaration does not declare anything}}
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// ---------------------------------------------------------------------------
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// Pretty printing of __kindof
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// ---------------------------------------------------------------------------
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void test_pretty_print(int *ip) {
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__kindof NSObject *kindof_NSObject;
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ip = kindof_NSObject; // expected-warning{{from '__kindof NSObject *'}}
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__kindof NSObject_ptr_typedef kindof_NSObject_ptr;
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ip = kindof_NSObject_ptr; // expected-warning{{from '__kindof NSObject_ptr_typedef'}}
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__kindof id <NSCopying> *kindof_NSCopying;
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ip = kindof_NSCopying; // expected-warning{{from '__kindof id<NSCopying> *'}}
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__kindof NSObject_ptr_typedef *kindof_NSObject_ptr_typedef;
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ip = kindof_NSObject_ptr_typedef; // expected-warning{{from '__kindof NSObject_ptr_typedef *'}}
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}
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// ---------------------------------------------------------------------------
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// Basic implicit conversions (dropping __kindof, upcasts, etc.)
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// ---------------------------------------------------------------------------
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void test_add_remove_kindof_conversions(void) {
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__kindof NSObject *kindof_NSObject_obj;
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NSObject *NSObject_obj;
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// Conversion back and forth
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kindof_NSObject_obj = NSObject_obj;
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NSObject_obj = kindof_NSObject_obj;
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// Qualified-id conversion back and forth.
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__kindof id <NSCopying> kindof_id_NSCopying_obj;
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id <NSCopying> id_NSCopying_obj;
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kindof_id_NSCopying_obj = id_NSCopying_obj;
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id_NSCopying_obj = kindof_id_NSCopying_obj;
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}
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void test_upcast_conversions(void) {
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__kindof NSObject *kindof_NSObject_obj;
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NSObject *NSObject_obj;
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// Upcasts
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__kindof NSString *kindof_NSString_obj;
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NSString *NSString_obj;
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kindof_NSObject_obj = kindof_NSString_obj;
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kindof_NSObject_obj = NSString_obj;
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NSObject_obj = kindof_NSString_obj;
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NSObject_obj = NSString_obj;
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// "Upcasts" with qualified-id.
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__kindof id <NSCopying> kindof_id_NSCopying_obj;
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id <NSCopying> id_NSCopying_obj;
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kindof_id_NSCopying_obj = kindof_NSString_obj;
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kindof_id_NSCopying_obj = NSString_obj;
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id_NSCopying_obj = kindof_NSString_obj;
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id_NSCopying_obj = NSString_obj;
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}
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void test_ptr_object_conversions(void) {
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__kindof NSObject **ptr_kindof_NSObject_obj;
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NSObject **ptr_NSObject_obj;
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// Conversions back and forth.
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ptr_kindof_NSObject_obj = ptr_NSObject_obj;
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ptr_NSObject_obj = ptr_kindof_NSObject_obj;
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// Conversions back and forth with qualified-id.
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__kindof id <NSCopying> *ptr_kindof_id_NSCopying_obj;
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id <NSCopying> *ptr_id_NSCopying_obj;
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ptr_kindof_id_NSCopying_obj = ptr_id_NSCopying_obj;
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ptr_id_NSCopying_obj = ptr_kindof_id_NSCopying_obj;
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// Upcasts.
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__kindof NSString **ptr_kindof_NSString_obj;
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NSString **ptr_NSString_obj;
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ptr_kindof_NSObject_obj = ptr_kindof_NSString_obj;
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ptr_kindof_NSObject_obj = ptr_NSString_obj;
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ptr_NSObject_obj = ptr_kindof_NSString_obj;
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ptr_NSObject_obj = ptr_NSString_obj;
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}
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// ---------------------------------------------------------------------------
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// Implicit downcasting
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// ---------------------------------------------------------------------------
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void test_downcast_conversions(void) {
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__kindof NSObject *kindof_NSObject_obj;
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NSObject *NSObject_obj;
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__kindof NSString *kindof_NSString_obj;
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NSString *NSString_obj;
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// Implicit downcasting.
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kindof_NSString_obj = kindof_NSObject_obj;
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kindof_NSString_obj = NSObject_obj; // expected-warning{{assigning to '__kindof NSString *' from 'NSObject *'}}
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NSString_obj = kindof_NSObject_obj;
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NSString_obj = NSObject_obj; // expected-warning{{assigning to 'NSString *' from 'NSObject *'}}
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// Implicit downcasting with qualified id.
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__kindof id <NSCopying> kindof_NSCopying_obj;
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id <NSCopying> NSCopying_obj;
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kindof_NSString_obj = kindof_NSCopying_obj;
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kindof_NSString_obj = NSCopying_obj; // expected-warning{{from incompatible type 'id<NSCopying>'}}
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NSString_obj = kindof_NSCopying_obj;
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NSString_obj = NSCopying_obj; // expected-warning{{from incompatible type 'id<NSCopying>'}}
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kindof_NSObject_obj = kindof_NSCopying_obj;
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kindof_NSObject_obj = NSCopying_obj; // expected-warning{{from incompatible type 'id<NSCopying>'}}
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NSObject_obj = kindof_NSCopying_obj;
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NSObject_obj = NSCopying_obj; // expected-warning{{from incompatible type 'id<NSCopying>'}}
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}
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void test_crosscast_conversions(void) {
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__kindof NSString *kindof_NSString_obj;
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NSString *NSString_obj;
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__kindof NSNumber *kindof_NSNumber_obj;
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NSNumber *NSNumber_obj;
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NSString_obj = kindof_NSNumber_obj; // expected-warning{{from '__kindof NSNumber *'}}
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}
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@interface NSCell : NSObject
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@end
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@interface NSCellSub : NSCell
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@end
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@interface NSCellSub2 : NSCell
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@end
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@interface NSCellSubSub : NSCellSub
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@end
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typedef signed char BOOL;
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void test_conditional(BOOL flag) {
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NSCellSubSub *result;
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__kindof NSCellSub *kindof_Sub;
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NSCell *cell;
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NSCellSub *sub;
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NSCellSub2 *sub2;
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NSCellSubSub *subsub;
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// LHS is kindof NSCellSub, RHS is NSCell --> kindof NSCell
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// LHS is kindof NSCellSub, RHS is NSCellSub --> kindof NSCellSub
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// LHS is kindof NSCellSub, RHS is NSCellSub2 --> kindof NSCell
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// LHS is kindof NSCellSub, RHS is NSCellSubSub --> kindof NSCellSub
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result = flag ? kindof_Sub : cell;
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result = flag ? kindof_Sub : sub;
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result = flag ? kindof_Sub : sub2;
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result = flag ? kindof_Sub : subsub;
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result = flag ? cell : kindof_Sub;
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result = flag ? sub : kindof_Sub;
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result = flag ? sub2 : kindof_Sub;
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result = flag ? subsub : kindof_Sub;
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}
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// ---------------------------------------------------------------------------
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// Blocks
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// ---------------------------------------------------------------------------
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void test_block_conversions(void) {
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// Adding/removing __kindof from return type.
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__kindof NSString *(^kindof_NSString_void_block)(void);
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NSString *(^NSString_void_block)(void);
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kindof_NSString_void_block = NSString_void_block;
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NSString_void_block = kindof_NSString_void_block;
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// Covariant return type.
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__kindof NSMutableString *(^kindof_NSMutableString_void_block)(void);
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NSMutableString *(^NSMutableString_void_block)(void);
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kindof_NSString_void_block = NSMutableString_void_block;
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NSString_void_block = kindof_NSMutableString_void_block;
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kindof_NSString_void_block = NSMutableString_void_block;
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NSString_void_block = kindof_NSMutableString_void_block;
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// "Covariant" return type via downcasting rule.
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kindof_NSMutableString_void_block = NSString_void_block; // expected-error{{from 'NSString *(^)(void)'}}
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NSMutableString_void_block = kindof_NSString_void_block;
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kindof_NSMutableString_void_block = NSString_void_block; // expected-error{{from 'NSString *(^)(void)'}}
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NSMutableString_void_block = kindof_NSString_void_block;
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// Cross-casted return type.
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__kindof NSNumber *(^kindof_NSNumber_void_block)(void);
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NSNumber *(^NSNumber_void_block)(void);
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kindof_NSString_void_block = NSNumber_void_block; // expected-error{{from 'NSNumber *(^)(void)'}}
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NSString_void_block = kindof_NSNumber_void_block; // expected-error{{'__kindof NSNumber *(^)(void)'}}
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kindof_NSString_void_block = NSNumber_void_block; // expected-error{{from 'NSNumber *(^)(void)'}}
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NSString_void_block = kindof_NSNumber_void_block; // expected-error{{'__kindof NSNumber *(^)(void)'}}
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// Adding/removing __kindof from argument type.
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void (^void_kindof_NSString_block)(__kindof NSString *);
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void (^void_NSString_block)(NSString *);
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void_kindof_NSString_block = void_NSString_block;
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void_NSString_block = void_kindof_NSString_block;
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// Contravariant argument type.
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void (^void_kindof_NSMutableString_block)(__kindof NSMutableString *);
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void (^void_NSMutableString_block)(NSMutableString *);
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void_kindof_NSMutableString_block = void_kindof_NSString_block;
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void_kindof_NSMutableString_block = void_NSString_block;
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void_NSMutableString_block = void_kindof_NSString_block;
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void_NSMutableString_block = void_NSString_block;
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// "Contravariant" argument type via downcasting rule.
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void_kindof_NSString_block = void_kindof_NSMutableString_block;
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void_kindof_NSString_block = void_NSMutableString_block;
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void_NSString_block = void_kindof_NSMutableString_block; // expected-error{{from 'void (^)(__kindof NSMutableString *)'}}
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void_NSString_block = void_NSMutableString_block; // expected-error{{from 'void (^)(NSMutableString *)'}}
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}
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// ---------------------------------------------------------------------------
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// Messaging __kindof types.
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// ---------------------------------------------------------------------------
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void message_kindof_object(__kindof NSString *kindof_NSString) {
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[kindof_NSString retain]; // in superclass
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[kindof_NSString stringByAppendingString:0]; // in class
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[kindof_NSString appendString:0]; // in subclass
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[kindof_NSString numberByAddingNumber: 0]; // expected-warning{{instance method '-numberByAddingNumber:' not found (return type defaults to 'id')}}
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[kindof_NSString randomMethod]; // in protocol
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}
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void message_kindof_qualified_id(__kindof id <NSCopying> kindof_NSCopying) {
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[kindof_NSCopying copy]; // in protocol
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[kindof_NSCopying stringByAppendingString:0]; // in some class
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[kindof_NSCopying randomMethod]; // in unrelated protocol
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}
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void message_kindof_qualified_class(
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__kindof Class <NSCopying> kindof_NSCopying) {
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[kindof_NSCopying classCopy]; // in protocol
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[kindof_NSCopying string]; // in some class
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[kindof_NSCopying randomClassMethod]; // in unrelated protocol
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}
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// Make sure we don't emit warning about multiple methods found.
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typedef int NSInteger;
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@interface Foo : NSObject
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- (NSString*)test;
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@end
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@interface Bar : NSObject
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- (NSInteger)test;
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@end
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void test(__kindof Bar *kBar) {
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[kBar test];
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}
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// Make sure we don't emit warning about no method found.
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@interface A : NSObject
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@property (readonly, getter=isActive) BOOL active;
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@end
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@interface B : NSObject
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@property (getter=isActive, readonly) BOOL active;
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@end
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void foo() {
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__kindof B *NSApp;
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if ([NSApp isActive]) {
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}
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}
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typedef const struct CGPath *CGPathRef;
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@interface C : NSObject
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@property (copy) NSString *path;
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@end
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@interface D : NSObject
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@property CGPathRef path __attribute__((availability(macosx,unavailable)));
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@end
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// Make sure we choose "NSString *path" for [s1 path].
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void bar(id s1, id s2) {
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return [[s1 path] compare:[s2 path]];
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}
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// ---------------------------------------------------------------------------
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// __kindof within specialized types
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// ---------------------------------------------------------------------------
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@interface NSArray<T> : NSObject
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@end
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void implicit_convert_array(NSArray<__kindof NSString *> *kindofStringsArray,
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NSArray<NSString *> *stringsArray,
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NSArray<__kindof NSMutableString *>
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*kindofMutStringsArray,
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NSArray<NSMutableString *> *mutStringsArray) {
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// Adding/removing __kindof is okay.
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kindofStringsArray = stringsArray;
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stringsArray = kindofStringsArray;
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// Other covariant and contravariant conversions still not permitted.
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kindofStringsArray = mutStringsArray; // expected-warning{{incompatible pointer types}}
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stringsArray = kindofMutStringsArray; // expected-warning{{incompatible pointer types}}
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mutStringsArray = kindofStringsArray; // expected-warning{{incompatible pointer types}}
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// Adding/removing nested __kindof is okay.
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NSArray<NSArray<__kindof NSString *> *> *kindofStringsArrayArray;
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NSArray<NSArray<NSString *> *> *stringsArrayArray;
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kindofStringsArrayArray = stringsArrayArray;
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stringsArrayArray = kindofStringsArrayArray;
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}
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// ---------------------------------------------------------------------------
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// __kindof + nullability
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// ---------------------------------------------------------------------------
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void testNullability() {
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// The base type being a pointer type tickles the bug.
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extern __kindof id <NSCopying> _Nonnull getSomeCopyable();
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NSString *string = getSomeCopyable(); // no-warning
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void processCopyable(__typeof(getSomeCopyable()) string);
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processCopyable(0); // expected-warning{{null passed to a callee that requires a non-null argument}}
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}
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// Make sure that we don't emit a warning about conflicting parameter types
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// between __kindof id and id.
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@interface A2 : NSObject
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- (void)test:(__kindof id)T;
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@end
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@implementation A2
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- (void)test:(id)T {
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}
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@end
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@interface NSGeneric<ObjectType> : NSObject
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- (void)test:(__kindof ObjectType)T;
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- (void)mapUsingBlock:(id (^)(__kindof ObjectType))block;
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@end
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@implementation NSGeneric
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- (void)test:(id)T {
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}
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- (void)mapUsingBlock:(id (^)(id))block {
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}
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@end
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// Check that clang doesn't crash when a type parameter is illegal.
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@interface Array1<T> : NSObject
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@end
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@interface I1 : NSObject
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@end
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@interface Array1<__kindof I1*>(extensions1) // expected-error{{expected type parameter name}}
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@end
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@interface Array2<T1, T2, T3> : NSObject
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@end
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@interface Array2<T, T, __kindof I1*>(extensions2) // expected-error{{expected type parameter name}} expected-error{{redeclaration of type parameter 'T'}}
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@end
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