1 // RUN: %clang_cc1 -verify -fsyntax-only %s
5 extern NSString *fa2 (const NSString *) __attribute__((format_arg(1)));
6 extern NSString *fa3 (NSString *) __attribute__((format_arg(1)));
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}}
12 struct s1 { int i; } __attribute__((format_arg(1))); // expected-warning {{'format_arg' attribute only applies to Objective-C methods and non-K&R-style functions}}
13 union u1 { int i; } __attribute__((format_arg(1))); // expected-warning {{'format_arg' attribute only applies to}}
14 enum e1 { E1V0 } __attribute__((format_arg(1))); // expected-warning {{'format_arg' attribute only applies to}}
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'}}
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)));
23 extern NSString *fi2 (NSString *) __attribute__((format_arg(1)));
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)));