1 files changed, 28 insertions, 0 deletions
diff --git a/test/SemaObjC/format-arg-attribute.m b/test/SemaObjC/format-arg-attribute.m
new file mode 100644
index 0000000..60cc7cb
--- /dev/null
+++ b/test/SemaObjC/format-arg-attribute.m
@@ -0,0 +1,28 @@
+// RUN: clang-cc -verify -fsyntax-only %s
+
+@class NSString;
+
+extern NSString *fa2 (const NSString *) __attribute__((format_arg(1)));
+extern NSString *fa3 (NSString *) __attribute__((format_arg(1)));
+
+extern void fc1 (const NSString *) __attribute__((format_arg));  // expected-error {{attribute requires 1 argument(s)}}
+extern void fc2 (const NSString *) __attribute__((format_arg())); // expected-error {{attribute requires 1 argument(s)}}
+extern void fc3 (const NSString *) __attribute__((format_arg(1, 2))); // expected-error {{attribute requires 1 argument(s)}}
+
+struct s1 { int i; } __attribute__((format_arg(1)));  // expected-warning {{'format_arg' attribute only applies to function types}}
+union u1 { int i; } __attribute__((format_arg(1)));  // expected-warning {{'format_arg' attribute only applies to function types}}
+// FIXME: We don't flag this yet.
+enum e1 { E1V0 } __attribute__((format_arg(1))); /* { dg-error "does not apply|only applies" "format_arg on enum" } */
+
+extern NSString *ff3 (const NSString *) __attribute__((format_arg(3-2)));
+extern NSString *ff4 (const NSString *) __attribute__((format_arg(foo))); // expected-error {{attribute requires 1 argument(s)}}
+
+/* format_arg formats must take and return a string.  */
+extern NSString *fi0 (int) __attribute__((format_arg(1)));  // expected-error {{format argument not a string type}}
+extern NSString *fi1 (NSString *) __attribute__((format_arg(1))); 
+
+extern NSString *fi2 (NSString *) __attribute__((format_arg(1))); 
+
+extern int fi3 (const NSString *) __attribute__((format_arg(1)));  // expected-error {{function does not return NSString}}
+extern NSString *fi4 (const NSString *) __attribute__((format_arg(1))); 
+extern NSString *fi5 (const NSString *) __attribute__((format_arg(1)));