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