1 // RUN: %clang_cc1 -fsyntax-only -verify -Wno-objc-root-class %s 2 3 @class FOO, BAR; // expected-note {{forward declaration of class here}} 4 @class FOO, BAR; 5 6 @interface INTF : FOO // expected-error {{attempting to use the forward class 'FOO' as superclass of 'INTF'}} 7 @end 8 9 @interface FOO 10 - (BAR*) Meth1; 11 - (FOO*) Meth2; 12 @end 13 14 @interface INTF1 : FOO 15 @end 16 17 @interface INTF2 : INTF1 // expected-note {{previous definition is here}} 18 @end 19 20 21 @class INTF1, INTF2; 22 23 @interface INTF2 : INTF1 // expected-error {{duplicate interface definition for class 'INTF2'}} 24 @end 25 26 // 2nd test of a forward class declaration matching a typedef name 27 // referring to class object. 28 // FIXME. This may become a negative test should we decide to make this an error. 29 // 30 @interface NSObject @end 31 32 @protocol XCElementP @end 33 34 typedef NSObject <XCElementP> XCElement; // expected-note {{previous definition is here}} 35 36 @interface XCElementMainImp { 37 XCElement * _editingElement; 38 } 39 @end 40 41 @class XCElement; // expected-warning {{redefinition of forward class 'XCElement' of a typedef name of an object type is ignored}} 42 43 @implementation XCElementMainImp 44 - (XCElement *)editingElement { return _editingElement; } 45 @end 46 47 48 // rdar://9653341 49 @class B; // expected-note {{forward declaration of class here}} 50 @interface A : B {} // expected-error {{attempting to use the forward class 'B' as superclass of 'A'}} 51 @end 52 53 @interface B : A {} 54 @end 55 56 @implementation A @end 57 @implementation B @end 58 59
