r203966 - Objective-C. Turn off designated initialization warnings on

[Fariborz Jahanian]

Author: fjahanian
Date: Fri Mar 14 15:35:00 2014
New Revision: 203966

URL: http://llvm.org/viewvc/llvm-project?rev=203966&view=rev
Log:
Objective-C. Turn off designated initialization warnings on
'init' methods which are unavailable. Subclasses of NSObject
have to implement such methods as a common pattern to prevent
user's own implementation. // rdar://16305460

Modified:
    cfe/trunk/lib/Sema/SemaDeclObjC.cpp
    cfe/trunk/test/SemaObjC/attr-designated-init.m

Modified: cfe/trunk/lib/Sema/SemaDeclObjC.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDeclObjC.cpp?rev=203966&r1=203965&r2=203966&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDeclObjC.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDeclObjC.cpp Fri Mar 14 15:35:00 2014
@@ -392,11 +392,14 @@ void Sema::ActOnStartOfObjCMethodDef(Sco
     if (MDecl->getMethodFamily() == OMF_init) {
       if (MDecl->isDesignatedInitializerForTheInterface()) {
         getCurFunction()->ObjCIsDesignatedInit = true;
-        getCurFunction()->ObjCWarnForNoDesignatedInitChain =
+        // Don't issue this warning for unavaialable inits.
+        if (!MDecl->isUnavailable())
+          getCurFunction()->ObjCWarnForNoDesignatedInitChain =
             IC->getSuperClass() != 0;
       } else if (IC->hasDesignatedInitializers()) {
         getCurFunction()->ObjCIsSecondaryInit = true;
-        getCurFunction()->ObjCWarnForNoInitDelegation = true;
+        // Don't issue this warning for unavaialable inits.
+        getCurFunction()->ObjCWarnForNoInitDelegation = !MDecl->isUnavailable();
       }
     }
 

Modified: cfe/trunk/test/SemaObjC/attr-designated-init.m
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaObjC/attr-designated-init.m?rev=203966&r1=203965&r2=203966&view=diff
==============================================================================
--- cfe/trunk/test/SemaObjC/attr-designated-init.m (original)
+++ cfe/trunk/test/SemaObjC/attr-designated-init.m Fri Mar 14 15:35:00 2014
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -fsyntax-only -verify -fblocks %s
+// RUN: %clang_cc1 -fsyntax-only -Wno-incomplete-implementation -verify -fblocks %s
 
 #define NS_DESIGNATED_INITIALIZER __attribute__((objc_designated_initializer))
 
@@ -248,3 +248,17 @@ __attribute__((objc_root_class))
     return ((void*)0);
 }
 @end
+
+// rdar://16305460
+__attribute__((objc_root_class))
+ at interface MyObject
+- (instancetype)initWithStuff:(id)stuff __attribute__((objc_designated_initializer));
+- (instancetype)init __attribute__((unavailable));
+ at end
+
+ at implementation MyObject
+- (instancetype)init
+{
+   return ((void*)0);
+}
+ at end