[clang] [alpha.webkit.NoUnretainedMemberChecker] Recognize NS_REQUIRES_PROPERTY_DEFINITIONS (PR #141293)

[Ryosuke Niwa via cfe-commits]

================
@@ -64,3 +64,33 @@ void forceTmplToInstantiate(FooTmpl<SomeObj, CFMutableArrayRef>) {}
   };
 
 } // namespace ptr_to_ptr_to_retained
+
+ at interface AnotherObject : NSObject {
+  NSString *ns_string;
+  CFStringRef cf_string;
+  // expected-warning at -1{{Instance variable 'cf_string' in 'AnotherObject' is a retainable type 'CFStringRef'; member variables must be a RetainPtr}}
+}
+ at property(nonatomic, strong) NSString *prop_string1;
+ at property(nonatomic, assign) NSString *prop_string2;
+// expected-warning at -1{{Property 'prop_string2' in 'AnotherObject' is a raw pointer to retainable type 'NSString'; member variables must be a RetainPtr}}
+ at property(nonatomic, unsafe_unretained) NSString *prop_string3;
+// expected-warning at -1{{Property 'prop_string3' in 'AnotherObject' is a raw pointer to retainable type 'NSString'; member variables must be a RetainPtr}}
+ at property(nonatomic, readonly) NSString *prop_string4;
+ at end
+
+NS_REQUIRES_PROPERTY_DEFINITIONS
+ at interface NoSynthObject : NSObject {
+  NSString *ns_string;
+  CFStringRef cf_string;
+  // expected-warning at -1{{Instance variable 'cf_string' in 'NoSynthObject' is a retainable type 'CFStringRef'; member variables must be a RetainPtr}}
+}
+ at property(nonatomic, readonly, strong) NSString *prop_string1;
+ at property(nonatomic, readonly, strong) NSString *prop_string2;
----------------
rniwa wrote:

sure, I'll add a test.

https://github.com/llvm/llvm-project/pull/141293