1 // RUN: %clang_cc1 -verify -fsyntax-only %s 2 3 @class NSString; 4 5 extern NSString *fa2 (const NSString *) __attribute__((format_arg(1))); 6 extern NSString *fa3 (NSString *) __attribute__((format_arg(1))); 7 8 extern void fc1 (const NSString *) __attribute__((format_arg)); // expected-error {{'format_arg' attribute takes one argument}} 9 extern void fc2 (const NSString *) __attribute__((format_arg())); // expected-error {{'format_arg' attribute takes one argument}} 10 extern void fc3 (const NSString *) __attribute__((format_arg(1, 2))); // expected-error {{'format_arg' attribute takes one argument}} 11 12 struct s1 { int i; } __attribute__((format_arg(1))); // expected-warning {{'format_arg' attribute only applies to non-K&R-style functions}} 13 union u1 { int i; } __attribute__((format_arg(1))); // expected-warning {{'format_arg' attribute only applies to non-K&R-style functions}} 14 enum e1 { E1V0 } __attribute__((format_arg(1))); // expected-warning {{'format_arg' attribute only applies to non-K&R-style functions}} 15 16 extern NSString *ff3 (const NSString *) __attribute__((format_arg(3-2))); 17 extern NSString *ff4 (const NSString *) __attribute__((format_arg(foo))); // expected-error {{use of undeclared identifier 'foo'}} 18 19 /* format_arg formats must take and return a string. */ 20 extern NSString *fi0 (int) __attribute__((format_arg(1))); // expected-error {{format argument not a string type}} 21 extern NSString *fi1 (NSString *) __attribute__((format_arg(1))); 22 23 extern NSString *fi2 (NSString *) __attribute__((format_arg(1))); 24 25 extern int fi3 (const NSString *) __attribute__((format_arg(1))); // expected-error {{function does not return NSString}} 26 extern NSString *fi4 (const NSString *) __attribute__((format_arg(1))); 27 extern NSString *fi5 (const NSString *) __attribute__((format_arg(1))); 28
