--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/Parser/attributes.mm	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -verify -fsyntax-only -Wno-objc-root-class %s
+
+// FIXME: Why isn't this supported? Seems useful for availability attributes at
+// the very least.
+__attribute__((deprecated)) @class B; // expected-error {{prefix attribute must be followed by an interface, protocol, or implementation}}
+
+__attribute__((deprecated)) @interface A @end
+__attribute__((deprecated)) @protocol P0;
+__attribute__((deprecated)) @protocol P1
+@end
+
+#define EXP __attribute__((visibility("default")))
+class EXP C {};
+EXP class C2 {}; // expected-warning {{attribute 'visibility' is ignored, place it after "class" to apply attribute to type declaration}}
+
+@interface EXP I @end // expected-error {{postfix attributes are not allowed on Objective-C directives, place them in front of '@interface'}}
+EXP @interface I2 @end
+
+@implementation EXP I @end // expected-error-re {{postfix attributes are not allowed on Objective-C directives{{$}}}}
+EXP @implementation I2 @end
+
+@class EXP OC; // expected-error-re {{postfix attributes are not allowed on Objective-C directives{{$}}}}
+EXP @class OC2; // expected-error {{prefix attribute must be followed by an interface, protocol, or implementation}}
+
+@protocol EXP P @end // expected-error {{postfix attributes are not allowed on Objective-C directives, place them in front of '@protocol'}}
+EXP @protocol P2 @end