1// RUN: %clang_cc1 -verify -fsyntax-only %s
2
3@class NSString;
4@class NSAttributedString;
5
6extern NSString *fa2 (const NSString *) __attribute__((format_arg(1)));
7extern NSString *fa3 (NSString *) __attribute__((format_arg(1)));
8
9extern void fc1 (const NSString *) __attribute__((format_arg));  // expected-error {{'format_arg' attribute takes one argument}}
10extern void fc2 (const NSString *) __attribute__((format_arg())); // expected-error {{'format_arg' attribute takes one argument}}
11extern void fc3 (const NSString *) __attribute__((format_arg(1, 2))); // expected-error {{'format_arg' attribute takes one argument}}
12
13struct s1 { int i; } __attribute__((format_arg(1)));  // expected-warning {{'format_arg' attribute only applies to Objective-C methods and non-K&R-style functions}}
14union u1 { int i; } __attribute__((format_arg(1)));  // expected-warning {{'format_arg' attribute only applies to}}
15enum e1 { E1V0 } __attribute__((format_arg(1))); // expected-warning {{'format_arg' attribute only applies to}}
16
17extern NSString *ff3 (const NSString *) __attribute__((format_arg(3-2)));
18extern NSString *ff4 (const NSString *) __attribute__((format_arg(foo))); // expected-error {{use of undeclared identifier 'foo'}}
19
20/* format_arg formats must take and return a string.  */
21extern NSString *fi0 (int) __attribute__((format_arg(1)));  // expected-error {{format argument not a string type}}
22extern NSString *fi1 (NSString *) __attribute__((format_arg(1)));
23
24extern NSString *fi2 (NSString *) __attribute__((format_arg(1)));
25
26extern int fi3 (const NSString *) __attribute__((format_arg(1)));  // expected-error {{function does not return NSString}}
27extern NSString *fi4 (const NSString *) __attribute__((format_arg(1)));
28extern NSString *fi5 (const NSString *) __attribute__((format_arg(1)));
29
30extern NSAttributedString *fattrs (const NSString *) __attribute__((format_arg(1)));
31