1*67e74705SXin Li// RUN: %clang_cc1 -fsyntax-only -verify -Wno-objc-root-class %s 2*67e74705SXin Li 3*67e74705SXin Li@class FOO, BAR; // expected-note {{forward declaration of class here}} 4*67e74705SXin Li@class FOO, BAR; 5*67e74705SXin Li 6*67e74705SXin Li@interface INTF : FOO // expected-error {{attempting to use the forward class 'FOO' as superclass of 'INTF'}} 7*67e74705SXin Li@end 8*67e74705SXin Li 9*67e74705SXin Li@interface FOO 10*67e74705SXin Li- (BAR*) Meth1; 11*67e74705SXin Li- (FOO*) Meth2; 12*67e74705SXin Li@end 13*67e74705SXin Li 14*67e74705SXin Li@interface INTF1 : FOO 15*67e74705SXin Li@end 16*67e74705SXin Li 17*67e74705SXin Li@interface INTF2 : INTF1 // expected-note {{previous definition is here}} 18*67e74705SXin Li@end 19*67e74705SXin Li 20*67e74705SXin Li 21*67e74705SXin Li@class INTF1, INTF2; 22*67e74705SXin Li 23*67e74705SXin Li@interface INTF2 : INTF1 // expected-error {{duplicate interface definition for class 'INTF2'}} 24*67e74705SXin Li@end 25*67e74705SXin Li 26*67e74705SXin Li// 2nd test of a forward class declaration matching a typedef name 27*67e74705SXin Li// referring to class object. 28*67e74705SXin Li// FIXME. This may become a negative test should we decide to make this an error. 29*67e74705SXin Li// 30*67e74705SXin Li@interface NSObject @end 31*67e74705SXin Li 32*67e74705SXin Li@protocol XCElementP @end 33*67e74705SXin Li 34*67e74705SXin Litypedef NSObject <XCElementP> XCElement; // expected-note {{previous definition is here}} 35*67e74705SXin Li 36*67e74705SXin Li@interface XCElementMainImp { 37*67e74705SXin Li XCElement * _editingElement; 38*67e74705SXin Li} 39*67e74705SXin Li@end 40*67e74705SXin Li 41*67e74705SXin Li@class XCElement; // expected-warning {{redefinition of forward class 'XCElement' of a typedef name of an object type is ignored}} 42*67e74705SXin Li 43*67e74705SXin Li@implementation XCElementMainImp 44*67e74705SXin Li- (XCElement *)editingElement { return _editingElement; } 45*67e74705SXin Li@end 46*67e74705SXin Li 47*67e74705SXin Li 48*67e74705SXin Li// rdar://9653341 49*67e74705SXin Li@class B; // expected-note {{forward declaration of class here}} 50*67e74705SXin Li@interface A : B {} // expected-error {{attempting to use the forward class 'B' as superclass of 'A'}} 51*67e74705SXin Li@end 52*67e74705SXin Li 53*67e74705SXin Li@interface B : A {} 54*67e74705SXin Li@end 55*67e74705SXin Li 56*67e74705SXin Li@implementation A @end 57*67e74705SXin Li@implementation B @end 58*67e74705SXin Li 59