[Bug objc/47076] New: Protocol referenced in @interface declarations should be defined

[nicola at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47076

           Summary: Protocol referenced in @interface declarations should
                    be defined
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: objc
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: nicola@gcc.gnu.org


All the protocols in the list of protocols in an @interface declaration should
have been defined; forward-references are not enough.  Here is a testcase --

/* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.
 */
/* { dg-do compile } */

/* Test that all protocols appearing in @interface declarations are             
   real (ie, we saw a full @protocol definition with list of methods),          
   and not just forward-references (ie, "@protocol NSObject;").  */

#include <objc/objc.h>

@protocol MyProtocol;

@protocol MyProtocol2
- (int)method2;
@end

@interface MyClass <MyProtocol> /* { dg-warning "definition of protocol
.MyProtocol. not found" } */
@end

@interface MyClass2 <MyProtocol2> /* Ok */
@end

@interface MyClass2 (Category) <MyProtocol>  /* { dg-warning "definition of
protocol .MyProtocol. not found" } */
@end

Thanks