gcc/testsuite/obj-c++.dg/method-8.mm

/* Tests of duplication.  */
/* { dg-do compile } */
// { dg-additional-options "-Wno-objc-root-class" }

@interface class1
- (int) meth1;   /* { dg-message "previous declaration" } */
- (void) meth1;  /* { dg-error "duplicate declaration of method .\\-meth1." } */
@end

@interface class2
+ (void) meth1; /* { dg-message "previous declaration" } */
+ (int) meth1;  /* { dg-error "duplicate declaration of method .\\+meth1." } */
@end

@interface class3
- (int) meth1;
@end

@implementation class3
- (int) meth1 { return 0; } /* { dg-message "previously defined here" } */
- (int) meth1 { return 0; } /* { dg-error "redefinition of" } */
@end

@interface class4
+ (void) meth1;
@end

@implementation class4
+ (void) meth1 {} /* { dg-message "previously defined here" } */
+ (void) meth1 {} /* { dg-error "redefinition of" } */
@end