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