llvm-project/clang/test/Parser/check-syntax-1.m

// RUN: %clang_cc1 -fsyntax-only -verify %s

int @interface bla  ; // expected-error {{cannot combine with previous 'int' declaration specifier}}
@end

typedef float CGFloat;
@interface XNSNumber 
+ (XNSNumber *) numberWithCGFloat  : (CGFloat) float; // expected-error {{expected identifier}}  \
                                                      // expected-error {{expected ';' after method prototype}}
@end

// rdar: // 7822196
@interface A
(void) x;	// expected-error {{method type specifier must start with '-' or '+'}} 
(int)im; // expected-error {{method type specifier must start with '-' or '+'}} \
- ok;
@end